Normal waste water : • Demi Water Plant • Chemical Dosing System • Sampling System Abnormal waste water: • Boiler Chemicla Cleaning(Rinse) • EP Washing Water • AH Washing Water • Blowdown Quenching Water • SCR Waste Water • CPP Waste Water • Electro Chlorination Plant • Plant Area Sump • Coal Runoff Pond • Ash Waste Water Oily waste water: • Unit1 Turbine building oily sump • Unit2 Turbine building oily sump • Unit1 Transformer area oily sump • Unit2 Transformer area oily sump • Fire Fighting Pump House Area Sump • Aux Boiler Area Oily Sump • Unit1 Boiler area oily sump • Unit2 Boiler area oily sump • Fly ash transfer compresser shelter oily sump • LDO area Oily Sump • Workshop Wareahouse area oily sump • Vehicle repair shop area oily sump The purpose of waste water treatment plant is to collect normal, abnormal and oily waste water generated in the power plant, treat them and then dispose as per requirement.
FOR CONSTRUCTION 0INT1 Rev Owner 30.06.2020 H.J.KIM Y.H.PARK S.K.LEE 21.10.2019 H.J.KIM Y.H.PARK S.K.LEE FOR CONSTRUCTION FOR CONSTRUCTION Date Prepared Checked Approved Details of Revision Owner’s Engineer Contractor DOOSAN HEAVY INDUSTRIES & CONSTRUCTION Sub-Supplier CHUNG-AM WATER TREATMENT & ENGINEERING CO., LTD Project NGHI SON BOT THERMAL POWER PLANT PROJECT (2×600MW) Title SYSTEM DESCRIPTION FOR WASTE WATER TREATMENT PLANT Document No Rev NS2-XS00-P0GN-120001 0INT1 Page-No 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 RECORD OF REVISION Rev Date Page Affected Description of Revision 21.10.2019 33 For Construction 0INT1 30.06.2020 34 For Construction Rev.0INT1 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 Table of Contents No Description Page Introduction System / Component Description 2.1 Main Equipment 2.2 Flow Diagram 10 2.2.1 Oily Water Treatment Plant 10 2.2.2 Industrial Waste Water Treatment Plant 11 2.3 Industrial Waste Water Treatment Process 12 2.4 Equipment Description 13 Chemicals Handling for Waste Water Treatment Plant 17 3.1 Filling of Chemical Storage Tank 17 3.2 Responsibilities and Duties during Chemical Filling 18 Control 19 Code & Standard 20 References & Abbreviation 22 Operation Philosophy for Waste Water Treatment 23 Rev.0INT1 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 INTRODUCTION This system description is prepared to understand the process & equipment for waste water treatment plant in Nghi Son Thermal Power Plant Project in Vietnam Waste water treatment plant of Nghi Son Thermal Power Plant is consisting of following major sources of waste water streams SYSTEM / COMPONENT DESCRIPTION Normal waste water : • Demi Water Plant • Chemical Dosing System • Sampling System Abnormal waste water: • Boiler Chemicla Cleaning(Rinse) • EP Washing Water • AH Washing Water • Blowdown Quenching Water • SCR Waste Water • CPP Waste Water • Electro Chlorination Plant • Plant Area Sump • Coal Run-off Pond • Ash Waste Water Oily waste water: • Unit#1 Turbine building oily sump • Unit#2 Turbine building oily sump • Unit#1 Transformer area oily sump • Unit#2 Transformer area oily sump • Fire Fighting Pump House Area Sump • Aux Boiler Area Oily Sump • Unit#1 Boiler area oily sump • Unit#2 Boiler area oily sump • Fly ash transfer compresser shelter oily sump • LDO area Oily Sump • Workshop & Wareahouse area oily sump • Vehicle repair shop area oily sump The purpose of waste water treatment plant is to collect normal, abnormal and oily waste water generated in the power plant, treat them and then dispose as per requirement Rev.0INT1 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 2.1 MAIN EQUIPEMNT Specification Denomination Industrial waste water treatment system Normal Waste Water Pond (P0GNK01BB001) Normal Waste Water Feed Pump A/B (P0GNK02/03AP001) Abnormal Waste Water Pond (P0GNK05BB001) AIR-BLOWER(COMMON) (P0GNC11/12/13AN001) Abnormal Waste Water Feed Pump (P0GNK05/06/07AP001) pH Adjustment Pond (P0GNK08BB001) Agitator for pH Adjustment Pond (P0GNK08AM001) Coagulation Pond (P0GNK08BB002) Agitator for Coagulation Pond (P0GNK08AM002) Flocculation Pond (P0GNK08BB003) Agitator for Flocculation Pond (P0GNK08AM003) Clarifier (P0GNS01BB001) - Quantity - Dimension - Effective Depth - Retention Time - Material - Quantity - Type - Capacity - Head - Quantity - Dimension - Effective Depth - Retention Time - Material - Quantity - Type - Capacity - Head - Quantity - Type - Capacity - Head - Quantity - Dimension - Effective Depth - Retention Time - Material One (1×100%) 41mL x 12mW x 4mH 3.5mH 8hr RCC + Painting Two (2 ×100%) Horizontal & Centrifugal 180m3/hr 15m One (1×100%) 41mL x 34.5mW x 4mH 3.5mH 50hr RCC + Painting Three (3 ×50%) Twin lobe (Roots) 35Nm3/min 4m Three (3×50%) Horizontal & Centrifugal 80m3/hr 15m One (1×100%) 6.0mL x 4.0mW x 3.0mH 2.5mH 20min RCC + Painting - Quantity - Type (Impeller) - Speed - Material (Impeller) - Quantity - Dimension - Effective Depth - Retention Time - Material - Quantity - Type (Impeller) - Speed - Material (Impeller) - Quantity - Dimension - Effective Depth - Retention Time - Material - Quantity - Type (Impeller) - Speed - Material (Impeller) - Quantity - Dimension - Effective Depth - Retention Time One (1×100%) Propeller / 2stage 153RPM CS + R/L Rev.0INT1 One (1×100%) 3.0mL x 4.0mW x 3.0mH 2.5mH 10min RCC + Painting One (1×100%) Propeller / 2stage 153RPM STS316 One (1×100%) 6.0mL x 4.0mW x 3.0mH 2.5mH 20min RCC + Painting One (1×100%) Propeller/ 2stage 51RPM STS316 One (1×100%) 17.0mΦ x 3.8mH 3.3mH 4hr of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 Specification Denomination Clarifier Scraper (P0GNS01AM001) - Material RCC + Painting - Quantity - Type (Motor/Reducer) - Speed - Material - Quantity - Type - Capacity - Head - Quantity - Dimension - Effective Depth - Retention Time - Material - Quantity - Type - Capacity - Head - Quantity - Type - Capacity - Head Dual Medial Filter (DMF) A/B (P0GNK13/14BB001) - Quantity - Dimension - Type - Linear Velocity - Material Activated Carbon Filter (ACF) A/B (P0GNK15/16BB001) - Quantity - Dimension - Type - Linear Velocity - Material One (1×100%) Vertical / Cycloid 0.038RPM SS400 + Painting Two (2 ×100%) Horizontal & Centrifugal 19m3/hr 20m One (1×100%) 7.65mL x 7.65mW x 4.0mH 3.5mH 1hr RCC + Painting Two (2 ×100%) Horizontal & Centrifugal 180m3/hr 30m Two (2 ×100%) Twin lobe (Roots) 8Nm3/min 4m Two (2 ×100%) 3.4mΦ x 1.83mH Vertical & Cylindrical 20㎥/㎡/hr A516-70 + Epoxy painting Two (2 ×100%) 3.4mΦ x 2.4mH Vertical & Cylindrical 20㎥/㎡/hr A516-70 + Epoxy painting Final pH Adjustment Pond (P0GNK20BB001) - Quantity - Dimension - Effective Depth - Retention Time - Material One (1×100%) 7.65mL x 4.0mW x 2.5mH 2mH 15min RCC + Painting Agitator for Final pH Adjustment Pond (P0GNK20AM001) - Quantity - Type (Impeller) - Speed - Material (Impeller) - Quantity - Dimension - Effective Depth - Retention Time - Material - Quantity - Type - Capacity - Head One (1×100%) Propeller / 2stage 106RPM A240-304 One (1×100%) 7.65mL x 13.5mW x 4.0mH 3.5mH 2hr RCC + Painting Two (2 ×100%) Horizontal & Centrifugal 330m3/hr 20m Two (2 ×100%) Horizontal & Centrifugal 180m3/hr 40m Sludge Transfer Pump A/B (P0GNS02/03AP001) Clarified Water Pond (P0GNK10BB001) Clarified Water Pump A/B (P0GNK11/12AP001) Air Blower A/B for DMF (P0GNC01/02AN001) Final Effluent Pond (P0GNK20BB002) Final Backwash Pump A/B (P0GNK25/26AP001) Final Effluent Pump A/B (P0GNK22/23AP001) - Quantity - Type - Capacity - Head Rev.0INT1 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 Specification Denomination Sludge Thickener (P0GNS05BB001) - Quantity - Dimension - Effective Depth - Retention Time - Material Sludge Thickener Scraper (P0GNS05AM001) - Quantity - Type (Motor/Reducer) - Speed - Material Thickened Sludge Transfer Pump A/B (P0GNS06/07AP001) - Quantity - Type - Capacity - Head - Quantity - Dimension - Effective Depth - Retention Time - Material - Quantity - Type (Impeller) - Speed - Material (Impeller) - Quantity - Type - Capacity - Head - Quantity - Dimension - Effective Capacity - Material - Accessories Sludge Mixing Tank (P0GNS08BB001) Agitator for Sludge Mixing Tank (P0GNS08AM001) Sludge Lift Pump (P0GNS10AP001/002) Filter Press (P0GNS10AT001) Caustic Storage Tank (P0GNN01BB001) Cuastic Unloading & Transfer Pump A/B (P0GNN02/03AP001) Caustic Dosing Tank (P0GNN05BB001) Caustic Dosing Pump A/B (For pH Adjustment Pond) (P0GNN06/07AP001) Caustic Dosing Pump A/B (For Final pH Adjustment Pond) (P0GNN08/09AP001) Agitator for Caustic Dosing Tank (P0GNN05AM001) - Quantity - Dimension - Type - Material - Quantity - Type - Capacity - Head - Quantity - Dimension - Type - Retention Time - Material - Quantity - Type - Capacity - Head - Quantity - Type - Capacity - Head - Quantity - Type (Motor/Impeller) - Speed - Material (Impeller) Rev.0INT1 One (1×100%) 5.0mΦ x 3.8mH 3.3mH 4.5hr RCC + Painting One (1×100%) Vertical / Cycloid 0.13 RPM SS400 + Painting Two (2 ×100%) Horizontal & Centrifugal 19m3/hr 20m One (1×100%) 1.6mΦ x 2mH 1.8mH 25min SS400 + Epoxy painting One (1×100%) Propeller / 2stage 153RPM A240-304 Two (2 ×100%) Diaphragm 340L/min 5bar One (1×100%) 7.0mL x 1.8mW x 2.7mH 2.8 m3/hr A36 + Epoxy Painting Cake Hopper 1set Control Panel 1set One (1×100%) 2.4mΦ x 2.5mH Cylindrical A240 - 304 Two (2 ×100%) Horizontal & Centrifugal 2m3 12m One (1×100%) 1.4mΦ x 1.6mH Cylindrical 48hr A240-304 Two (2×100%) Diaphragm 70ℓ/hr 20m Two (2×100%) Diaphragm 70ℓ/hr 20m One (1×100%) Propeller / 2stage 150RPM A240-304 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 Specification Denomination Acid Storage Tank A/B (P0GNN11BB001) - Quantity - Dimension - Type - Material - Quantity - Type - Capacity - Head - Quantity - Dimension - Type - Retention Time - Material - Quantity - Type - Capacity - Head - Quantity - Type - Capacity - Head - Quantity - Type (Motor/Impeller) - Speed - Material (Impeller) - Quantity - Dimension - Type - Material - Quantity - Type - Capacity - Head - Quantity - Dimension - Type - Retention Time - Material - Quantity - Type - Capacity - Head - Quantity - Type (Impeller) - Speed - Material (Impeller) Two (2×100%) 2.4mΦ x 2.5mH Cylindrical SS400 + Rubber Lining Two (2×100%) Horizontal & Centrifugal 2m3 12m One (1×100%) 1.4mΦ x 1.6mH Cylindrical 48hr SS400 + Rubber Lining Two (2×100%) Diaphragm 70ℓ/hr 20m Two (2×100%) Diaphragm 70ℓ/hr 20m One (1×100%) Propeller / 2stage 150RPM SS400 + Rubber Lining One (1×100%) 2.4mΦ x4.7mH Cylindrical A240-304 Two (2×100%) Horizontal & Centrifugal 5m3/hr 12m One (1×100%) 1.4mΦ x 1.6mH Cylindrical 72hr A240-304 Two (2×100%) Diaphragm 122ℓ/hr 20m One (1×100%) Propeller / 2stage 150RPM A240-304 A-Polymer Auto Dissolving Unit (P0GNN21BB001) - Quantity - Type - Size One (1×100%) 3-Stage Tank 1.84mL x 0.75mW x0.75mH A-Polymer Dosing Pump A/B (P0GNN22/23AP001) - Quantity - Type - Capacity - Head - Quantity - Type - Size - Material Two (2×100%) Diaphragm 360ℓ/hr 20m One (1×100%) Vertical 0.45mΦ x 0.75mH FRP Acid Unloading & Transfer Pump A/B (P0GNN12/13AP001) Acid Dosing Tank (P0GNN15BB001) Acid Dosing Pump A/B (For pH Adjustment Pond) (P0GNN16/17AP001) Acid Dosing Pump A/B (For Final pH Adjustment Pond) (P0GNN18/19AP001) Agitator for Acid Dosing Tank (P0GNN15AM001) Coagulant Storage Tank (P0GNN25BB001) Coagulant Transfer Pump A/B (P0GNN26/27AP001) Coagulant Dosing Tank (P0GNN28BB001) Coagulant Dosing Pump A/B (P0GNN29/30AP001) Agitator for Coagulant Dosing Tank (P0GNN28AM001) Fume Absorber (P0GNN14BB001) Rev.0INT1 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 Specification Denomination Drum Pump A/B (P0GNN31/32AP001) Sump Pump A/B for Drain Pit (P0GNN34/35AP001) Pump Room Drain Pit (P0GNN33BB001) Air Receiver Tank for Instrument Air (P0GNB11BB001) Air Receiver Tank for Service Air (P0GNC05BB001) Eye washer & Safety shower (P0GNK26AZ001/002/003/004) WWT Retention Pond (P0GNK30BB001) WWT Transfer Pump A/B for WWT Retention Pond (P0GNK30/31AP001) - Quantity - Type - Capacity - Head - Quantity - Type - Capacity - Head - Quantity - Dimension - Effective Depth - Retention Time - Material - Quantity - Type - Capacity - Size - Material - Quantity - Type - Capacity - Size - Material - Quantity - Type Two (2×100%) Drum Pump 5m3/hr 18m Two (2×100%) Drum Pump 20m3/hr 15m One (1×100%) 2.0mL x 1.4mW x 2.0mH 1.8mH 1hr RCC + Painting One (1×100%) Vertical & Cylindrical 0.28m3 0.55mΦ x 1.2mH A240 Gr 304 One (1×100%) Vertical & Cylindrical 0.28m3 0.55mΦ x 1.2mH A240 Gr 304 Four (4×100%) Hand & Foot Control - Quantity - Dimension - Effective Depth - Retention Time - Material - Quantity - Type - Capacity - Head One (1×100%) 65mL x 35mW x 4.1mH 3.5mH day RCC + Painting Two (2 ×100%) Horizontal Self-Priming 180m3/hr 30m - Quantity - Dimension - Effective Depth - Retention Time - Material - Quantity - Size - Type - Capacity - Material One (1×100%) 6.35mL x 16.0mW x 4.0mH 3.5mH 12hr RCC + Painting Two (2×100%) 0.55mL x 0.4mW x 0.65mH Belt 90l/hr x 2set A240TP304 / A283Gr.C, A194 Gr2H Two (2×100%) Horizontal & Centrifugal 25m3/hr 15m Two (2×100%) 5.12mL x1.72mW x1.9mH EPS 25m3/hr SS400 + Epoxy painting 0INT1 Oily waste water treatment system Oily Waste Water Pond (P0GNB01BB001) Oil Skimmer A/B (P0GNB01/02AT001) Oily Waste Water Feed Pump A/B (P0GNB04/05AP001) Oil Separator (P0GNB05/06AT001) - Quantity - Type - Capacity - Head - Quantity - Size - Type - Capacity - Material Rev.0INT1 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 Specification Denomination Oil Sludge Pond (P0GNB10BB001) - Quantity - Dimension - Effective Depth - Material One (1×100%) 2.0mL x 2.5mW x 1.2mH 1.0mH RCC + Painting Oil Sludge & Skimmed Oil Pump (P0GNB10AP001/002) - Quantity - Type - Capacity - Head Two (2×100%) Diaphragm 10m3/hr 20m Rev.0INT1 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 CODE & STANDARD Regulations on quality of treated wastewater: − QCVN 40:2011/BTNMT – National technical regulation on industrial wastewater Sl No Parameter Unit Value A °C 8F °C 40 B Maximum cooling water temperature increase (between cooling water system condenser inlet and outlet) Absolute discharge temperature pH - 6.0 to 9.0 C Smell - Negligible Colour (Co Pt/Co 50 Biological oxygen demand (BOD at 20°C) mg/l 40.5 Chemical oxygen demand (COD) mg/l 80 Total suspended solids mg/l 50 Arsenic mg/l 0.081 10 Mercury mg/l 0.005 11 Lead mg/l 0.405 12 Cadmium mg/l 0.0081 13 Chromium (total) mg/l 0.5 14 Chromium (as Cr6) mg/l 15 Chromium (as Cr3) mg/l 16 Copper mg/l 0.081 (provided Chromium (total) does not exceed 0.5 mg/l) 0.5 (provided Chromium (total) does not exceed 0.5 mg/l) 0.5 17 Zinc mg/l 1.0 18 Nickel mg/l 0.405 19 Manganese mg/l 0.81 20 Iron mg/l 1.0 21 Tin mg/l 0.81 22 Cyanide mg/l 0.08 23 Phenol mg/l 0.405 24 Mineral oil and fat mg/l 4.05 25 Animal vegetable fat and oil mg/l 26 Total residual chlorine mg/l 10 (including mineral oil and fat / oil and grease) 0.2 27 PCBs mg/l 0.0081 28 Pesticides (organic phosphate) mg/l 0.81 29 Pesticides (organic chlorine) mg/l 0.081 30 Sulphur mg/l 0.405 31 Fluoride mg/l 8.1 32 Chloride mg/l 486 D ‐Pt in pH = 7) Rev.0INT1 20 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 33 Ammonia (as N) mg/l 8.1 34 Total nitrogen (N) mg/l 24.3 35 Total phosphorus (P) mg/l 4.86 36 Coliform bacteria MPN E /100ml 5000 37 Bioassay 38 α active radiation Bq/l 90% of fishes alive after 96 hours in 100% waste water 0.1 39 β active radiation Bq/l 1.0 - When specification is not available, the equipment shall confirm to related • Waste water Engineering Treatment and Reuse (4th) (Metcalf & Eddy) • Standard Handbook of Environmental Engineering (Rober A Corbitt) • General Chemistry 2nd edition by D.A McQUARRIE and P.A ROCK • EIA of NS2 project International Standards mentioned below: ISO International Standards Organization API 12R1 Recommended Practice for Setting, Maintenance, Inspection, Operation and Repair of Tanks in production service ASME American Society of Mechanical Engineers ANSI American National Standards Institute BS Applicable British Standards Institute API American Petroleum Institute ISA Instrument Society of America JSCE Japan Society of Civil Engineering Rev.0INT1 21 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 REFERENCES & ABBREVIATION In the design of waste water treatment plant following project drawings were followed 6.1 REFERENCES P&I Diagram : NS2-XG02-P0GN-120001 Calculation sheet : NS2-CC07-P0GN-120001 6.2 ABBREVIATION A-Polymer : anionic polymer Auto : automatic CCR : central control room DMF : dual media filter ACF : activated carbon filter EPS : Egg plate shape HR : hour HMI : human machine interface MCC : motor control center LSHH : level signal high high LSH : level signal high LSL : level signal low LSLL : level signal low low Man : manual PLC : programmable logic control W/W : waste water VLV : valve Rev.0INT1 22 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 OPERATION PHILOSOPHY FOR WASTE WATER TREATMENT PLANT 7.1 GENERAL Operation philosophy is based on P&ID of waste water treatment plant Alarming signal from pH analyzer (high, low) will be interfaced to HMI The alarm signal of pH in water is generated in the HMI from analogue signals from the respective field instruments 7.2 NORMAL WASTE WATER FEED PUMPS(P0GNK02/03AP001) Two normal waste water feed pumps(1W+1S) will be operated alternatively and controlled by level transmitter(high/low operation by clarified water pond level transmitter) Even if signal for normal waste water feed pond & abnormal waste water feed pond is both high level , there is no problem in operation, as the capacity of normal waste water feed pumps is enough to handle all normal waste water & abnormal waste water 7.2.1 Automatic Mode: A signal to start up the first pump from HMI according to the high level signal (LSH) from level transmitter (P0GNK01CL001) A signal to stop the operation pump from HMI according to low level signal (LSL) from level transmitter (P0GNK01CL001) Operation will be interfaced to HMI Interlock signals of level transmitter (P0GNK01CL001) for dry run (LSLL) or difference pressure indicator transmitter(P0GNK01CP001/002) high value or level transmitter (P0GNK10CL001) high high level (LSHH) or chemical tank level switch(P0GNN05CL080, P0GNN15CL080, P0GNN28CL080, P0GNN21CL080)(LSLL) will be interfaced to HMI When one of Agitator for pH Adjustment Pond (P0GNK08AM001), Agitator for Coagulation Pond(P0GNK08AM002), Agitator for Flocculation Pond (P0GNK08AM003) is trip, pump will stop 7.2.2 Manual Mode: Pumps can be operated by start and stop using the HMI 7.3 ABNORMAL WASTE WATER FEED PUMPS(P0GNK05/06/07AP001) Three abnormal waste water feed pumps(2W+1S) will be operated alternatively and controlled by level transmitter(high/low operation by abnormal / normal waste water pond level transmitter (The choice for 2W should be chosen by the operator depending on the presence or absence of water in the abnormal waste wate pond) 7.3.1 Automatic Mode: A signal to start up the first pump from HMI according to the high level signal (LSH) from level transmitter A signal to stop the operation pump from HMI according to low level signal (LSL) from level transmitter Operation will be interfaced to HMI Interlock signals of level transmitter(P0GNK05CL001) for dry run (LSLL) or level transmitter(P0GNK01CL001) high high level (LSHH) or difference pressure indicator transmitter(P0GNK04CP001/002/003) high value will be interfaced to HMI Rev.0INT1 23 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 7.3.2 Manual Mode: Pumps can be operated by start and stop using the HMI 7.4 AGITATOR FOR pH ADJUSTMENT POND(P0GNK08AM001) The agitator will be interlocked with normal waste water feed pumps 7.4.1 Automatic Mode: Agitator for pH adjustment pond will be operated continuously In case of normal waste water feed pumps are stopped, the agitator will be stopped after minutes The agitator will be operated again with operation of the normal waste water feed pumps 7.4.2 Manual Mode: Agitator can be operated by start and stop using the HMI 7.5 AGITATOR FOR COAGULATION POND(P0GNK08AM002) The agitator will be interlocked with normal waste water feed pumps 7.5.1 Automatic Mode: Agitator for coagulation tank will be operated continuously In case of normal waste water feed pumps are stopped, the agitator will be stopped after 5minutes The agitator will be operated again with operation of the normal waste water feed pumps 7.5.2 Manual Mode: Agitator can be operated by start and stop using the HMI 7.6 AGITATOR FOR FLOCCULATION POND(P0GNK08AM003) The agitator will be interlocked with normal waste water feed pumps 7.6.1 Automatic Mode: Agitator for coagulation pond will be operated continuously In case of normal waste water feed pumps are stopped, the agitator will be stopped after 5minutes The agitator will be operated again with operation of the normal waste water feed pumps 7.6.2 Manual Mode: Agitator can be operated by start and stop using the HMI 7.7 CLARIFIER SCRAPER(P0GNS01AM001) 7.7.1 Manual Mode: Clarifier scraper can be operated manually • Clarifier scraper can be operated by start and stop push buttons on control panel except for the system trip • Normally Clarifier scraper can be operated continuously • In case of the clarifier scraper is started again after shut down, it is certain that the settledsludge around the bottom of clarifier is disposed 7.8 CLARIFIED WATER PUMPS(P0GNK11/12AP001) Two clarified water feed pumps(1W+1S) will be operated alternatively and controlled by level transmitter(high/low operation by clarified water pond level transmitter) 7.8.1 Automatic Mode: Rev.0INT1 24 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 A signal to start up the first pump from HMI according to the high level signal (LSH) from level transmitter(P0GNK10CL001) A signal to stop the operation pump from HMI according to low level signal (LSL) from level transmitter(P0GNK10CL001) Operation will be interfaced to HMI Interlock signals of level transmitter(P0GNK10CL001) for dry run (LSLL) or level transmitter(P0GNK20CL001) high high level (LSHH) & Dual Media Filter A(P0GNK13BB001) service in valve(P0GNK13AA051) / service out valve(P0GNK13AA052) open or Activated Carbon Filter A(P0GNK15BB001) service in valve(P0GNK15AA051)/service out valve(P0GNK15AA052) open or Dual Media Filter B(P0GNK14BB001) service in valve(P0GNK14AA051)/service out valve(P0GNK14AA052) open or Activated Carbon Filter B(P0GNK16BB001) service in valve(P0GNK16AA051)/service out valve(P0GNK16AA052) open will be interfaced to HMI 7.8.2 Manual Mode: Pumps can be operated by start and stop using the HMI 7.9 DUAL MEDIA FILTER(P0GNK13/14BB001) Clarified water will enter dual media filter from the clarified water pond by clarified water pump 7.9.1 Operating Condition: A signal to start up the first pump from HMI according to the high level signal (LSH) from level transmitter(P0GNK10CL001) A signal to stop the operation pump from HMI according to low level signal (LSL) from level transmitter(P0GNK10CL001) Operation will be interfaced to HMI Interlock signals of level transmitter(P0GNK10CL001) for dry run (LSLL) or level transmitter(P0GNK20CL001) high high level (LSHH) & Dual Media Filter A(P0GNK13BB001) service in valve(P0GNK13AA051)/service out valve(P0GNK13AA052) open or Activated Carbon Filter A(P0GNK15BB001) service in valve(P0GNK15AA051)/service out valve(P0GNK15AA052) open or Dual Media Filter B(P0GNK14BB001) service in valve(P0GNK14AA051)/service out valve(P0GNK14AA052) open or Activated Carbon Filter B(P0GNK16BB001) service in valve(P0GNK16AA051)/service out valve(P0GNK16AA052) open will be interfaced to HMI 7.9.2 Manual Mode: Valve can be operated ON/OFF 7.9.3 Backwash Mode 7.9.3.1 Drain: (30 seconds) Vent operation when deferential pressure transmitter becomes the high point to: Open and close automatic valves, as per the following table 7.9.3.2 Air bubbling: (5 minutes) Air inlet after vent operation is finished: During air inlet period, air blower for dual media filter will be on operation Open and close automatic valves, as per the following table 7.9.3.3 Backwash period: (15 minutes) Backwash after air blowing: During backwash period, filter backwash pump will be on operation Open and close automatic valves, as per the following table 7.9.3.4 Vent operation: (30 seconds) Rev.0INT1 25 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 After backwash time is finished, a signal will reverse the opening of the above valves: Open and close automatic valves, as per the following table 7.9.3.5 Rinse operation: (5 minutes) After vent time is finished, a signal will reverse the opening of the above valves: During rinse period, clarified water pump will be on operation Open and close automatic valves, as per the following table 7.9.3.6 Stand-By: After rinse time is finished, a signal will reverse the opening of the above valves: Open and close automatic valves, as per the following table This control description covers the process control functional logic requirement for following equipment KKS NO Description Purpose P0GNK13/14AA051 Dual Media Filter Valve #1 Service water inlet P0GNK13/14AA052 Dual Media Filter Valve #2 Service water outlet P0GNK13/14AA053 Dual Media Filter Valve #3 Backwash water inlet P0GNK13/14AA 054 Dual Media Filter Valve #4 Backwash water outlet P0GNK13/14AA 055 Dual Media Filter Valve #5 Vent P0GNK13/14AA 056 Dual Media Filter Valve #6 Rinse outlet P0GNK13/14AA 057 Dual Media Filter Valve #7 Air inlet ※ Command Status Table OFF OFF OFF OFF ON ON OFF Air Bubbling OFF OFF OFF ON OFF OFF ON Back wash OFF OFF ON ON OFF OFF OFF Water Filling ON OFF OFF OFF ON OFF OFF OFF OFF OFF ON OFF OFF ON OFF KKS NO Service Drain P0GNK13/14AA051 P0GNK13/14AA052 P0GNK13/14AA053 P0GNK13/14AA 054 P0GNK13/14AA 055 P0GNK13/14AA 056 P0GNK13/14AA 057 Filter backwash pump (P0GNK25/26AP001) Air blower for DMF (P0GNC01/02AN001) ON ON OFF OFF OFF OFF OFF Rinse Stand-By ON OFF OFF OFF OFF ON OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF Depending on site conditions, regeneration time and sequence can be modified 7.9.4 Operation Description: Backwash Start Condition Dual Media Filter and Activated Carbon Filter Train’s Service Sequence will be decided using the HMI Backwash Sequence Operation Time: Dual Media Filter and Activated Carbon Filter is sequentially regenerated after 24 hours operating Differential Pressure Transmitter: If the differential pressure over 1bar, Dual Media Filter and Activated Carbon Filter is sequentially egenerated When final effluent pond level is high When the Dual Media Filter and Activated Carbon Filter are backwash, other Dual Media Filter and Activated Carbon Filter are service operation in the standby state Rev.0INT1 26 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 After the backwash ended, Dual Media Filter and Activated Carbon Filter will be in standby mode 7.10 ACTIVATED CARBON FILTER(P0GNK15/16BB001) Filtrated water will be transferred from dual media filter to the activated carbon filter 7.10.1 Operating Condition: Refer 7.0 7.10.2 Manual Mode: Valve can be operated ON/OFF 7.10.3 Backwash Mode 7.10.3.1 Backwash period: (15 minutes) Backwash when deferential pressure transmitter becomes the high point to: During backwash period, filter backwash pump will be on operation Open and close automatic valves, as per following table 7.10.3.2 Rinse operation: (5 minutes) After vent time is finished, a signal will reverse the opening of the above valves: During rinse period, clarified water pump will be on operation Open and close automatic valves, as per following table 7.10.3.3 Normal operation: After rinse time is finished, a signal will reverse the opening of the above valves: Open and close automatic valves, as per following table This control description covers the process control functional logic requirement for following equipment KKS NO Description Purpose P0GNK15/16AA051 Activated Carbon Filter Valve #1 Service water inlet P0GNK15/16AA052 Activated Carbon Filter Valve #2 Service water outlet P0GNK15/16AA053 Activated Carbon Filter Valve #3 Backwash water inlet P0GNK15/16AA054 Activated Carbon Filter Valve #4 Backwash water outlet P0GNK15/16AA055 Activated Carbon Filter Valve #5 Vent P0GNK15/16AA056 Activated Carbon Filter Valve #6 Rinse outlet ※ Command Status Table KKS NO Service Backwash Rinse Stand-By P0GNK15/16AA051 ON OFF ON OFF P0GNK15/16AA052 ON OFF OFF OFF P0GNK15/16AA053 OFF ON OFF OFF P0GNK15/16AA054 OFF ON OFF OFF P0GNK15/16AA055 OFF OFF OFF OFF P0GNK15/16AA056 OFF OFF ON OFF Filter backwash pump (P0GNK25/26AP001) OFF ON OFF OFF Depending on site conditions, regeneration time and sequence can be modified Rev.0INT1 27 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 7.10.4 Operation Description: Backwash Start Condition Dual Media Filter and Activated Carbon Filter Train’s Service Sequence will be decided using the HMI Regeneration Sequence Operation Time: Dual Media Filter and Activated Carbon Filter is sequentially regenerated after 24 operating Differential Pressure Transmitter: If the differential pressure over 1bar, Dual Media Filter and Activated Carbon Filter is sequentially egenerated When the Dual Media Filter and Activated Carbon Filter are backwash, other Dual Media Filter and Activated Carbon Filter are service operation in the standby state After the backwash ended, Dual Media Filter and Activated Carbon Filter will be in standby mode DMF & ACF sequentially proceed the backwash process After completion of the process and stand-by 7.11 AGITATOR FOR FINAL pH ADJUSTMENT POND (P0GNK20AM001) The agitator will be interlocked with clarified water pumps 7.11.1 Automatic Mode: Agitator for final pH Adjustment pond will be operated continuously In case of clarified water pump is stopped, the agitator will be stopped after minutes The agitator will be operated again with operation of the clarified water pumps 7.11.2 Manual Mode : Agitator can be operated by start and stop using the HMI 7.12 FILTER BACKWASH PUMPS(P0GNK25/26AP001) Filter Backwash pump (1W+1S) will be operated alternatively and interlocked with final effluent pond level transmitter, dual media filter & activated carbon filter backwash process The operator has to cross the operation similar to the operation time of the pump 7.12.1 Automatic Mode: If the backwash mode, Filter Backwash Pump is operating Refer to 7.9.3 Table and 7.10.3 Table 7.12.2 Manual Mode : Pumps can be operated by start and stop using the HMI 7.13 SLUDGE TRANSFER PUMPS(P0GNS02/03AP001) Two sludge transfer pumps will be operated alternatively and intermittently required 7.13.1 Manual Mode: Sludge transfer pumps are operated manually Pumps can be operated by start and stop using the HMI 7.14 SLUDGE THICKENER SCRAPER(P0GNS05AM001) 7.14.1 Manual Mode: Sludge thickener scraper can be operated manually Sludge thickener scraper can be operated by start and stop push buttons on control panel except for the system trip Normally sludge thickener scraper can operate continuously Rev.0INT1 28 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 In case of the scraper is start again after shut down, it is certain that the settled sludge around the bottom of sludge thickener is disposed 7.15 CAUSTIC DOSING PUMPS(P0GNN06/07/08/09AP001) Two caustic dosing pumps will be operated alternatively and controlled by pH analyzer, caustic dosing tank level switch and interlocked with normal waste water feed pumps Another two caustic dosing pumps will be operated alternatively and controlled by final pH analyzer, caustic dosing tank level switch which is interlocked with clarified water pumps 7.15.1 Automatic Mode (CAUSTIC DOSING PUMP A/B FOR pH ADJUSTMENT POND): They are interlocked with normal waste water feed pumps Normal waste water feed pumps are stopped, caustic dosing pump will be stopped and caustic dosing pump operates again with operation of normal waste water feed pump First caustic dosing pump will be operated if lower than 11.4, indicating of the pH analyzer (P0GNK08CQ001) (pH set point will be changed according to the condition of the waste water.) When pH meter is indicated higher than 11.4, it will stop pump Operation will be interfaced to HMI A signal to shut down the operation pump from HMI according to low low level signal (LSLL) from level switch (P0GNN05CL080) on the caustic dosing tank Interlock signals of level switch (P0GNN10CL080) for dry run (LSLL) will be interfaced to HMI 7.15.2 Manual Mode (CAUSTIC DOSING PUMP A/B FOR pH ADJUSTMENT POND): Pumps can be operated by start and stop using the HMI The flow quantity is controlled at the constant rate by fixing the flow control dial 7.15.3 Automatic Mode (CAUSTIC DOSING PUMP A/B FOR FINAL pH ADJUSTMENT POND): They are interlocked with Clarified Water Pumps Clarified Water Pumps are stopped, caustic dosing pump will be stopped and caustic dosing pump operates again with operation of Clarified water pump First caustic dosing pump will be operated if lower than 6, indicating of the pH analyzer (P0GNK20CQ001) (pH set point will be changed according to the condition of the waste water.) When pH meter is indicated higher than 6, it will stop pump Operation will be interfaced to HMI A signal to shut down the operation pump from HMI according to low low level signal (LSLL) from level switch (P0GNN05CL080) on the caustic dosing tank Interlock signals of level switch (P0GNN05CL080) for dry run (LSLL) will be interfaced to HMI After test working, pH value can be changed according to operating condition 7.15.4 Manual Mode (CAUSTIC DOSING PUMP A/B FOR FINAL pH ADJUSTMENT POND): Pumps can be operated by start and stop using the HMI The flow quantity is controlled at the constant rate by fixing the flow control dial 7.16 ACID DOSING PUMPS(P0GNN16/17/18/19AP001) Two acid dosing pumps will be operated alternatively and controlled by pH analyzer, acid dosing tank level switch and interlocked with normal waste water feed pumps another Two acid dosing pumps will be operated alternatively and controlled by Final pH analyzer, acid dosing tank level switch which is interlocked with clarified water pumps 7.16.1 Automatic Mode (ACID DOSING PUMP A/B FOR pH ADJUSTMENT POND): They are interlocked with normal waste water feed pumps Rev.0INT1 29 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 Normal waste water feed pumps are stopped, acid dosing pump will be stopped and acid dosing pump operates again with operation of normal waste water feed pump First acid dosing pump will be operated if higher than 11.6, indicating of the pH analyzer (P0GNK08CQ001) (pH set point will be changed according to the condition of the waste water) When pH meter is indicated lower than 11.6, it will stop pump Operation will be interfaced to HMI A signal to shut down the operation pump from HMI according to low low level signal (LSLL) from level switch (P0GNN15CL080) on the acid dosing tank Interlock signals of level switch (P0GNN15CL080) for dry run (LSLL) will be interfaced to HMI 7.16.2 Manual Mode (ACID DOSING PUMP A/B FOR pH ADJUSTMENT POND): Pumps can be operated by start and stop using on the HMI The flow quantity is controlled at the constant rate by fixing the flow control dial 7.16.3 Automatic Mode (ACID DOSING PUMP A/B FOR FINAL pH ADJUSTMENT POND): They are interlocked with Clarified Water Pumps Clarified Water Pumps are stopped, acid dosing pump will be stopped and acid dosing pump operates again with operation of Clarified Water Pumps First acid dosing pump will be operated if higher than 9.0, indicating of the pH analyzer (P0GNK20CQ001) (pH set point will be changed according to the condition of the waste water) When pH meter is indicated lower than 9, it will stop pump Operation will be interfaced to HMI A signal to shut down the operation pump from HMI according to low low level signal (LSLL) from level switch on the acid dosing tank Interlock signals of level switch (P0GNN15CL080) for dry run (LSLL) will be interfaced to HMI 7.16.4 Manual Mode (ACID DOSING PUMP A/B FOR FINAL pH ADJUSTMENT POND): Pumps can be operated by start and stop using the HMI The flow quantity is controlled at the constant rate by fixing the flow control dial 7.17 COAGULANT DOSING PUMPS(P0GNN29/30AP001) Two coagulant dosing pumps will be operated alternatively and controlled by from normal waste water feed pumps ,coagulant dosing tank level switch (P0GNN28CL080) and interlocked with normal Waste Water Feed Pumps 7.17.1 Automatic Mode: They are interlocked with normal waste water feed pumps Normal waste water feed pumps are stopped, coagulation dosing pump will be stopped after 5minutes and coagulation dosing pump operates again with operation of normal waste water feed pump Operation will be interfaced to HMI A signal to shut down the operation pump from HMI according to low low level signal (LSLL) from level switch (P0GNN28CL080) on the coagulant dosing tank Interlock signals of level switch (P0GNN28CL080) for dry run (LSLL) will be interfaced to HMI 7.17.2 Manual Mode: Pumps can be operated by start and stop using the HMI The flow quantity is controlled at the constant rate by fixing the flow control dial 7.18 A-POLYMER DOSING PUMPS(P0GNN22/23AP001) Two A-polymer dosing pumps will be operated alternatively and controlled by from HMI of flocculent auto dissolving unit, level switch (P0GNN21CL080) and interlocked with normal waste water feed pumps Rev.0INT1 30 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 7.18.1 Automatic Mode: They are interlocked with normal waste water feed pumps Operation will be interfaced to HMI A signal to shut down the operation pump from HMI of the flocculent auto dissolving unit Interlock signals of level switch (P0GNN01CL080) for dry run (LSLL) will be interfaced to HMI 7.18.2 Manual Mode: Pumps can be operated by start and stop using the HMI The flow quantity is controlled at the constant rate by fixing the flow control dial 7.19 THICKENED SLUDGE TRANSFER PUMP(P0GNS06/07AP001) Two thickened sludge transfer pumps will be operated alternatively and intermittently required 7.19.1 Manual Mode: Pumps can be operated by start and stop using the HMI When The Thickener is cleaned, The abnormal waste water pond should be emptied and starting 7.20 FILTER PRESS(P0GNS10AT001) This equipment is package system Filter Press will be operated using LCP only It will be only monitored by MMI of PLC 7.20.1 Semi-Automatic Mode Is In The Maker Standard Package : Hydraulic pump shall be operated according to cylinder forth signal from LCP of filter press Hydraulic pump shall be stopped according to the pressure value 170~190kg/cm2 Operator opens sludge inlet valve and closes drain valve Sludge pump shall be operated automatically according to timer setting (4hours) from LCP of filter press Operator can reset the timer to change the operation time Sludge pump shall be stopped after 4hours Operator closes sludge inlet valve and opens drain valve Hydraulic pump shall be operated according to cylinder back signal from LCP of filter press and stopped automatically Filter plate shall be moved and the cakes shall be removed 7.20.2 Manual Mode: Filter press can be operated manually Filter press can be operated by start and stop using the HMI except for the system trip 7.21 OIL SKIMMERS(P0GNB01/02AT001) 7.21.1 Manual Mode: Oil skimmer can be operated manually Oil skimmer can be operated by start and stop using the HMI except for the system trip Operation time : 24hr 7.22 OILY WASTE WATER FEED PUMPS(P0GNB04/05AP001) Two oily waste water feed pumps(1W+1S) will be operated alternatively and controlled by level transmitter 7.22.1 Automatic Mode: A signal to start up the first pump from HMI according to the high level signal (LSH) from level transmitter (P0GNB01CL001) Rev.0INT1 31 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 A signal to stop the operation pump from HMI according to low level signal (LSL) from level transmitter (P0GNB01CL001) Operation will be interfaced to HMI Interlock signals of level transmitter (P0GNB01CL001) for dry run (LSLL) & level switch (P0GNB10CL080) high high level (LSHH) & level transmitter (P0GNK01CL001) high high (LSHH) will be interfaced to HMI 7.22.2 Manual Mode: Pumps can be operated by start and stop using the HMI 7.23 OIL SLUDGE & SKIMMED OIL PUMP(P0GNB10AP001/002) Oil sludge & Skimmed oil pump will be operated manually according to requirements In purging the sludge, operator keep watching level switch to prevent overflow 7.24 OIL SEPARATOR(P0GNB05/06AT001) 7.24.1 Manual Mode: Two oil separators can be operated manually according to requirements Oil separator is operated with oily waste water feed pump Inlet water quantity is controlled by two of manual valves on the oily waste water feed pump discharge line at the constant rate Pipe oil skimmer is installed lower by 1mm than the water level by turning the handle of pipe skimmer With oily water separating tank uncovered, check that water and oil flow from pipe skimmer and then set the height of water dam regulator lower by 3.2mm than oil dam 7.25 SUMP PUMPS(P0GNK34/35AP001) for DRAIN PIT Two sump pumps will be operated alternatively and controlled by level switch (P0GNK33CL080) 7.25.1 Automatic Mode: A signal to start up the first pump from HMI according to the high level signal (LSH) from level switch (P0GNK33CL080) A signal to stop the operation pump from HMI according to low level signal (LSLL) from switch (P0GNK33CL080) level Operation will be interfaced to HMI Interlock signals of level switch (P0GNK33CL080) for dry run (LSLL) & level transmitter (P0GNK01CL001) high high level (LSHH) will be interfaced to HMI 7.25.2 Manual Mode: Pumps can be operated by start and stop using the HMI 7.26 AIR-BLOWER ( COMMON) P0GNC01/02/03AN001) 7.26.1 Manual Mode: Air-Blower can be operated manually Air-Blower can be operated by start and stop using the HMI except for the system trip Operation time : 24hr 7.27 AIR BLOWER FOR DMF(P0GNC01/02AN001) Two air blower for DMF(1W+1S) will be operated alternatively and controlled dual media filter backwash mode Rev.0INT1 32 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 The operator has to cross the operation similar to the operation time of the Air Blower 7.27.1 Automatic Mode: If the backwash mode, Air blower for DMF is operating Refer to 7.9.3 Table 7.27.2 Manual Mode: Air Blower for DMF can be operated by start and stop using the HMI 7.28 FINAL EFFLUENT PUMPS(P0GNK22/23AP001) Two post final effluent pumps(1W+1S) will be operated alternatively and controlled by level transmitter(P0GNK20CL001) The operator has to cross the operation similar to the operation time of the pump 7.28.1 Automatic Mode: A signal to start up the first pump from HMI according to the high level signal (LSH) from level transmitter (P0GNK20CL001) A signal to stop the operation pump from HMI according to low level signal (LSL) from level transmitter (P0GNK20CL001),or When DMF & ACF is Backwash Mode Operation will be interfaced to HMI 7.28.2 Manual Mode: Pumps can be operated by start and stop using the HMI 7.29 Pneumatic Valve On/OFF Table A Final Efflunet Pump(P0GNK22/23AP001)Strat running Time (within 30 secons) and pH Value (high or Low) or CW Dischage Canal DCS Signal : On Valve Name Valve status Reuse valve (P0GNK22AA051) OFF CW Dischage Canal Valve (P0GNK22AA052) OFF Nomal Waste Water Pond Return Valve(P0GNK22AA053) On B Final Efflunet Pump(P0GNK22/23AP001)Strat running Time (after 30 secons) and pH Value (Not Low & Not High) and CW Dischage Canal DCS Signal : off Valve status Valve Name Reuse DCS Signals Signal On Signal Off Reuse valve (P0GNK22AA051) On Off CW Dischage Canal Valve (P0GNK22AA052) Off On Nomal Waste Water Pond Return Valve(P0GNK22AA053) Off Off 7.30 CHEMICAL FILLING 7.30.1 Caustic Dosing Tank(P0GNN05BB001) Rev.0INT1 33 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 Level Switch (P0GNN05CL080) Water Pneumatic Valve (P0GNK05AA051) High Point OFF Caustic Unloading & Transfer Pump (P0GNN02/03AP001) OFF Chemical Point OFF ON ON Low Point ON OFF OFF Agitator (P0GNN05AM001) ON Note: When Level switch reach CP, agitator is started to operate and if the level switch reach high, agitator is operating during 30 minutes 7.30.2 Acid Dosing Tank(P0GNN15BB001) Level Switch (P0GNN15CL080) Water Pneumatic Valve (P0GNN15AA051) High Point OFF Acid Unloading & Transfer Pump (P0GNN12/13AA051) OFF Chemical Point OFF ON ON Low Point ON OFF OFF Agitator (P0GNN15AM001) ON Note: When Level switch reach CP, agitator is started to operate and if the level switch reach high, agitator is operating during 30 minutes 7.30.3 Coagulant(Alum) Dosing Tank(P0GNN28BB001) Level Switch (P0GNN28CL080) Water Pneumatic Valve (P0GNN28AA051) Coagulant Unloading & Transfer Pump (P0GNN26/27AP001) Agitator (P0GNN28AM001) High Point OFF OFF ON Chemical Point OFF ON ON Low Point ON OFF OFF Note: When Level switch reach CP, agitator is started to operate and if the level switch reach high, agitator is operating during 30 minutes 7.31 WWT TRANSFER PUMPS FOR WWT RETENTION POND(P0GNK30/31AP001) Two WWT transfer pumps (1W+1S) will be operated alternatively and controlled by level transmitter(P0GNK30CL001) The operator has to cross the operation similar to the operation time of the pump 7.31.1 Automatic Mode: A signal to start up the first pump from HMI according to the high level signal (LSH) from level transmitter (P0GNK30CL001) A signal to stop the operation pump from HMI according to low level signal (LSL) from level transmitter (P0GNK30CL001) Operation will be interfaced to HMI Interlock signals of level transmitter (P0GNK301CL001) for dry run (LSLL) & (P0GNK01CL001) high high (LSHH) will be interfaced to HMI level transmitter 7.31.2 Manual Mode: Pumps can be operated by start and stop using the HMI ※ Detailed values and sequence can be changed after commissioning and test Rev.0INT1 34 of 34 0INT1 .. .SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 RECORD OF REVISION Rev Date Page Affected Description of Revision 21.10.2019 33 For Construction 0INT1 30.06.2020 34 For Construction Rev.0INT1 of 34 SYSTEM. .. 30.06.2020 34 For Construction Rev.0INT1 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 Table of Contents No Description Page Introduction System / Component Description 2.1 Main Equipment 2.2 Flow Diagram... Operation Philosophy for Waste Water Treatment 23 Rev.0INT1 of 34 SYSTEM DESCRIPTION NS2-XS00-P0GN-120001 INTRODUCTION This system description is prepared to understand the process & equipment for