Thesis: Studying about Control System of DCU Dung Quat Refinery

LIST OF Figures 2 LIST OF Tables 2 TABLE OF CONTENTS 2 Chapter 1 An overview of Dung Quat Refinery 4 1.1 Geographical location of Dung Quat Refinery 4 1.2 Natural Conditions: 5 1.3 The importance of Dung Quat Refinery 6 1.4 Technical Features 7 1.5 History of Dung Quat Refinery 8 1.6 Organization Chart of Binh Son Refinery and Petrochemical Plant 11 1.7 Raw materials for Dung Quat Refinery 12 1.8 Process Units: 13 Chapter 2 Introduction of Crude Distillation Unit (CDU) 18 2.1 Introduction of Crude Distillation Unit (Unit 011) of Dung Quat Refinery 18 2.2 Mission of Crude Distillation Unit (Unit 011) 22 2.3 Characteristics of the Crude Oil input 23 2.3.1 Bach Ho Oil 23 2.3.2 Dubai Oil 25 2.4 Product Standards 25 2.5 Description of CDU processing technology 27 2.5.1 Preheater for Crude oil input 28 2.5.2 Desalter 29 2.5.3 Heat Furnace 31 2.6 Gasoline Stabilizer Tower 32 2.7 Crude Distillation Tower 33 2.7.1 Disc Structure of Distillation Tower 33 2.7.2 Description of the distillation operator 33 Chapter 3: Studying about Control System of CDU Dung Quat 40 3.1 Temperature control system of Kerosene stream. 41 3.1.1 Control Purpoes 41 3.1.2 The variables of control 41 3.1.4 Control Strategy 43 3.2 Control System of Overhead product of distillation tower 47 3.2.1 Control Purpoes 47 3.2.2 The variables of control 47 3.2.3 Schematic model 48 3.2.4 Control Strategy 49 3.3 Control System of bottom of the distillation column 54 3.3.2 The variables of control 54 3.3.3 Schematic model 54 3.3.4 Control Strategy 55 Conclusion: 60

MINISTRY OF EDUCATION AND TRAINING

HANOI UNIVERSITY OF MINING AND GEOLOGY

- -Graduation Thesis Nguyen Quang Trung CTTT12210127

Thesis:

Studying about Control System of

DCU - Dung Quat Refinery

Ha Noi, 6 - 2017

MINISTRY OF EDUCATION AND TRAINING

HANOI UNIVERSITY OF MINING AND GEOLOGY

- -Graduation Thesis Nguyen Quang Trung CTTT12210127

Thesis:

Studying about Control System of

DCU - Dung Quat Refinery

SUPERVISOR: REVIEWER:

Ha Noi, 6-2017

Control System of CDU Dung Quat Refinery

INTRODUCTION

Phân xưởng chưng cất khí quyển (Crude Distillation Unit) là phân xưởng cửa ngõ của nhà máy lọc hóa dầu Dung Quất, là phân xưởng cung cấp nguồn nguyên liệu cho hầu hết các phân xưởng kế tiếp của nhà máy lọc dầu Do đó, kiến thức về phân xưởng này là vô cùng quan trọng cho bất cứ 1 kỹ sư công nghệ hóa dầu nào.

Sự chưng cất được tiến hành trong các thiết bị chưng cất gồm tháp chưng cất và các thiết bị phụ trợ khác như lò gia nhiệt, thiết bị tách muối… Hầu hết các tháp chưng cất dùng trong công nghệ lọc dầu và chế biến khí tự nhiên là tháp đĩa, và tháp chưng cất của chính của nhà máy lọc dầu dung quất cũng vậy Trong một tháp chưng cất luôn có nhiều đĩa, tương ứng với mỗi dải nhiệt độ khác nhau lại cho ra những sản phẩm khác nhau phục vụ cho các phân xưởng phụ trợ kế tiếp Vì vậy việc điều khiển nhiệt độ đầu ra cũng như đầu vào của các dòng sản phẩm là việc làm vô cùng quan trọng Nó ảnh hưởng trực tiếp đến chất lượng sản phẩm thương mại và ảnh hưởng gián tiếp đến chi phí vận hành của nhà máy.

Do đó, trong đồ án tốt nghiệp: “Control system of CDU Dung Quat”, em xin được tìm hiểu về các quy trình điều khiển đặc trưng của tháp chưng cất dầu thô - Nhà máy lọc hóa dầu Dung Quất.

Control System of CDU Dung Quat Refinery

PREFACE

I sincerely thank Dr Nguyen Van Toan who has dedicated

guidance and help me Thanks to the teacher's guidance, I

understood the necessary issues and completed this thesis in due time.

However, with the large of workload and in a limited time, so during the process of compeleted this thesis I can not avoid

mistakes and shortcomings I hope all of our beloved teachers would review and help me perfect my project.

Once again, I would like to express my deep gratitude to Dr Nguyen Van Toan and all the teachers of Oil and Gas Faculty - major in Oil refining and Petrochemistry -( Hanoi University of Mining and Geology ) have helped me during 5 years of

studying and finishing this thesis.

Thank you sincerely!

Hanoi, 6-2017

Student

Nguyen Quang Trung

Control System of CDU Dung Quat Refinery

LIST OF Figures

Figure 1.1: Geographical of Dung Quat Refinery in the map

Figure 1.2: Organization Chart of Binh Son refinery and Petrochemical Plant

Figure 1.3: Organization Chart of BSR

Figure 1.4: Table of Dung Quat Refinery’s Process Unit

Figure 2.1: Crude Distillation Unit (Unit 011) of Dung Quat Refinery Figure 2.2: 3D strucuture of Crude Distillation Unit from South East

Figure 2.3: 3D sstrucuture of Crude Distillation Unit from West East

Figure 3.0: The P&ID diagram for the crude oil distillate control system Figure 3.1: Simple model of Kerosene thermal process

Figure 3.2: The P&ID diagram of Kerosene thermal control process

Figure 3.3: Block diameter for the Kerosene thermal control process

Figure 3.4: Simple model of Over-head product line thermal process

Figure 3.5: The P&ID diagram of Over-head product thermal control process

Figure 3.6: ck diameter for Over-head product thermal control process

Figure 3.7: Simple model of Bottom product line control process

Figure 3.8: Block diameter for Over-head product thermal control process

LIST OF Tables Table 1.1 The main Process units and Offsites of Dung Quat Refinery

Table 1.2 Product’s Capacity

Table 2.1: Distillation Curve and Propotion Curve of Bach Ho Crude oil

Table 2.2: Distillation Curve and Propotion Curve of Dubai Crude oil

Table 2.3 Product Standards

Talble 2.4 Summary of heat exchangers as well as hot product lines

Control System of CDU Dung Quat Refinery

TABLE OF CONTENTS

Control System of CDU Dung Quat Refinery

Chapter 1 - An overview of Dung Quat Refinery

1.1 Geographical location of Dung Quat Refinery

Dung Quat or Binh Son oil refinery, the first oil refinery of Vietnam is located at DungQuat Economic Zone, Quang Ngai province

Which has the Northwest borders Chu Lai Airport, the West borders National Highway1A, East and Northeastern East border the East Sea And Quang Ngai city is at theSouthwest Distance from Dung Quat refinery to:

- To Quang Ngai city: 25-40 km

- To Da Nang city: 100 km

- To Hanoi: 880 km

- To Ho Chi Minh City: 870 km

- 13 km to Chu Lai airport

- Inland Maritime road: 30 km

- International Maritime road: 190 km

- Geographical coordinates: 1080.47 degrees East, 150.23 degrees North latitude

Control System of CDU Dung Quat Refinery

Figure 1.1 Geographical of Dung Quat Refinery in the map

1.2 Natural Conditions:

- Dung Quat Economic Zone or Binh Son Refining is located in the flat terrain ofQuang Ngai Province, between the coast are low mountain range and sand dunes + Highest altitude : + 20m

Control System of CDU Dung Quat Refinery

+ Average wind speed : 2.9 m / s

+ Maximum wind speed : 40m / s

+ Typhoons: Quang Ngai as well as all the other central region which are seacoastal provinces are affected by storms On average per year, storms directlyaffects Quang Ngai province, caused heavy rain and very strong winds of level 6

or higher There are also three to four tornados along with heavy rain and strongwinds, sometimes accompanied by sea level rise

1.3 The importance of Dung Quat Refinery

Over the years the world has witnessed major fluctuations and needs in the oil andrefined oil markets Unstable situation in the major oil-supplying regions and the rise indemand of Oil-supplying have helped the price of Oil and gasoline increased to therecord levels Especially, In the year 2008, the world crude oil market was constantlyfluctuating unnormally It was the reason pushing the crude oil price to the record of150$/barrel, and then fell down magnificently to below 45$/barrel

Fluctuations in crude oil prices have had a negative impact on many economies, leading

to many consequences, affecting the growth rate of many countries, including our countryVietnam To reduce the negative impact of oil price fluctuations and ensure our nationalenergy security, Vietnam needs to be proactive in satisfying domestic demand of oil-supplying Building refineries will create a precondition for the chemical industry to

Control System of CDU Dung Quat Refinery

develop Refined products are the main raw material for polymerization production,lubricant additives and some cosmetic products Nowaday, more than 99% of the oilexports, 50% of the imported oil products are due to Foreign transport The productionand consumption of oil in the country make the domestic transporting service increase,especially the shipbuilding industry grow rapidly These are two important sectors thatare capable of generating great added value and a lot of potential for development Soafter all, Vietnam has decided to invest in building the first oil refinery in Dung Quat -Quang Ngai called Dung Quat The first Oil Refinery Dung Quat is located in QuangNgai province, in central region of Vietnam where has the lowest economic growth in thecountry The refinery plant located here do not directly create jobs or contribute to localbudgets But with the development of infrastructure including deep-water ports, roads,electricity, telecommunication networks serving refineries (without those factories)Open policies will attract domestic and foreign investment projects in Dung Quateconomic zone in particular and in the central region Dung Quat has attractivecomparative advantages: located in the midst of Vietnam and the region; There is Chu LaiInternational Airport, deep sea port; Has a new city with a full range of high qualityamenities and services; To enjoy the highest privileges in Vietnam and to apply theregime and mechanism of open management in line with international practices andadaptation to the nature of economic globalization today

1.4 Technical Features

Dung Quat refinery has a designed capacity of 6.5 million tons of crude oil annually, or

140 thousand barrels per day (22×103 m3/d) The capacity would be expanded to

10 million tons per year by 2013–2014 In addition to fuels, the refinery will also producepetro-chemical products The refinery complex area comprises:

• Overall Refinery Process, Utility and Offsites Facilities: about 110 ha;

Control System of CDU Dung Quat Refinery

Main contractors of the refinery were Technip, JGC Corporation, and TécnicasReunidas The refinery cost US$3 billion, up from $2.5 billion previously and more thandouble an original cost estimate of about $1.4 billion in 1994 It may need another

$1 billion to build a desulphurising unit targeted for 2013

1.5 History of Dung Quat Refinery

The Dung Quat refinery story began in 1995 with the withdrawal of Total from theproject (Total claimed the site of the refinery made no sense and would involve increasedcosts of more than $500m)

A consortium of foreign firms stepped in (LG Group, Petronas, Conoco, Stone andWebster and PRC - Chinese Petroleum Company and China Development) but withdrewtwo years later for the same reasons

In 1999, Prime Minister Phan Van Khai took steps to speed up construction of thecountry's first oil refinery The rekindled project was a joint venture between Vietsovpetro(a Vietnam-Russia joint venture responsible for the bulk of Vietnam's oil exports) andRussia's External Economic Federation (Zarubeznheft)

The joint venture was dissolved in December 2002 by the Russians who claimedthe refinery was not economically viable at the intended site In February 2003 Vietnamdecided to go it alone and continue with the refinery construction Phase I operationsbegan in February 2009

The Dung Quat refinery has cost an estimated at $3bn for construction andequipment The original front-end engineering and design contractor for the project was

Control System of CDU Dung Quat Refinery

Foster Wheeler Energy of the UK (this was superseded by a FEED agreement signedwith Technip in 2004) The refinery was built on a site consisting of 338ha of land and473ha of sea in the Dung Quat Economic Zone

Vietnam has awarded contracts to a group of construction companies includingTechnip-Coflexip of France, JGC Corp of Japan and Technicas Reunidas of Spain, fortechnology and equipment supply Stone and Webster provided project managementconsultancy services as per their October 2003 contract

One of the consortia, TPC Complex, which consists of Technip, TechnipGeoproduction and Technicas Reunidas, was awarded the engineering, procurement andconstruction turnkey contracts No.1 and No.4 for the refinery in May 2005 In June 2006the refinery selected the SmartPlant Enterprise as its standard software for management

of plant design, maintenance and operations of the plant

The refinery complex area consists of the following components:

- Refinery processing, utility and offsite facilities

(110ha) Crude oil tank farm and gas flare-off area

(42ha)

Product tank farm (36ha)

-Seawater intake, waste water processing and crude oil pipelines

(4ha) Interconnecting pipelines and road access (40ha)

-Harbour product export area (135ha)

Vietnam's National Assembly approved the construction of the Oil Refinery No.1

(Dung Quat) in 1997 with an investment of $1.3 billion (costs have since increased to

$2.5 billion), which came from crude oil revenue, credits and bond sales

Vietnam reimbursed Russia the $235 million it had put into the VietRoss venture inDecember 2002 when Russia withdrew (this money was previously earmarked forreinvestment into the offshore oil and gas fields of Vietnam)

Control System of CDU Dung Quat Refinery

The Bank for Foreign Trade of Vietnam (Vietcombank) was able to arrange loansworth $250 million

The consortium of contractors that won tender package No.1 was also able toarrange loans of $500 million in deferred payment terms

Source of Supply:

The refinery is outfitted to process oil from Bach Ho oil field, which is expected

to run dry before 2020 Petrovietnam has a preliminary agreement with BP for supplies

of similar quality to use exclusively until 2011

Ownership:

The refinery is owned and operated by Petrovietnam Petrovietnam negotiates withforeign oil companies, including Royal Dutch Shell, Essar Group and SK Energy,toupgrade and sell part of the refinery

Controversy

Critics of the project claim that the refinery is non-feasible, and the location ischosen for political, not economical reasons, as most of oil comes from offshore fields inSouthern Vietnam

Control System of CDU Dung Quat Refinery

1.6 Organization Chart of Binh Son Refinery and Petrochemical Plant

To run any kind of plants, how the organization chart is will somehow reflect theeffective or the feasibility of the project Unlike many other companies, BSR has built upits own organization chart to run their specific refinery configuration

Figure 1.2 : Organization Chart of Binh Son refinery and Petrochemical Plant

Figure 1.3: Organization Chart of BSR

1.7 Raw materials for Dung Quat Refinery

Crude oil used as raw material for the plant is crude oil from Bach Ho field andimported oil from Dubai

Bach Ho Oilfield is located in the Southeast Vietnam, about 145km from the coast ofVung Tau This is the main oil field for many Refining Factory of VietNam FromBach Ho OilField, there is a long-way gas pipeline along the shore to supply Dinh Coliquefied gas plant, Ba Ria power plant and Phu My electricity center Nowaday, weare using the lastest technology for mining, Bach Ho oilfield is currently exploited byself-spraying technology, contributing to the economy of the country Crude oil whichextracted from the Bach Ho oilfield has very good quality, which is sweet, light oiland have the low percentage of impurities Bach Ho Oilfield has a reserve of about

300 million tons and has been commercially exploited since the middle of 1986 It isthe largest oil field in Vietnam and now has the maximum exploitation capacity Eachday this oildfield could be exploited about 38000 tons of crude oil accounted for 80%

of Vietnam crude oil output Accoring to the plan, Dung Quat oil refinery will use

100% of crude oil from Bach Ho field in phase 1 and in phase 2, the factory willprocess crude oil mixture (85% crude oil of Bach Ho oildfield and 15% sour oil ofDubai).

1.8 Process Units:

Figure 1.4: Table of Dung Quat Refinery’s Process Unit

Dung Quat oil refinery is located in Binh Son district, Quang Ngai province Theproject site is comprised of four main areas: technology and auxiliary workshops,

product storage tankage areas, cargo terminals and wharf oil refueling and marinedischarge and discharge systems These areas are connected by pipeline systems withadjacent roads

Total area of the project is approximately 338 hectares, including the following:

- All technology workshops, auxiliaries and peripherals: about 110 hectares

- Sea area: 471 hectares

- Flare and Crude oil storage tank: about 42 hectares

- Product storage tank: about 44 hectares

-In addition, the port area of the product will occupy about 35 hectares

Here are the main Process units and Offsites of Dung Quat Refinery (Table 1.1):

Unit 011: Crude Distillation Unit (CDU)

Unit 014: Kerosene Treating Unit (KTU) Unit 037: – Fuel-gas: Used to burn for heating up for other units.

Unit 024: (LCO-HDT): diezel Hydrotreating Unit 058: Effulent Treatment Plant (ETP)

Unit 034: Sea water intake for cooling.

Unit 035: Instrument/Plant air Unit 036: Nitrogent plant Unit 037: Fuel gas

Unit 039: Caustic supply Unit 057: Flare: 115meters height Unit 059: Fire water: Two tanks Unit 100: RO: Silica Seperating

Offsite P1

Unit 038: – Fuel oil Unit 051: Intermediate tankge: 23 tankage Unit 054: – Blending Unit

Unit 055: Flushing oil: Using LGO from CDU to clean pipes system Unit 056: Slops oil: Collect oil from units, provide for CDU, RFCC unit Unit 060: Crude oil tankge -Included 8 tanks, each tank has the capacity

the sea) Unit 071: Interconnecting Pipleline (P1 P3) - 12 pipelines: 8 product pipelines and 4 auxiliary pipelines, total 7km long.

Unit 072: Interconnecting Pipleline (P3 Jetty): There are 15 pipelines: 10 product pipelines, 5 waste oil extraction lines and ballast water, 3km long.

Here are some main products of Dung Quat Refinery:

- Types of products:

+ Propylene

+ Liquefied Petroleum Gas (LPG)

+ Gasoline Mogas (A-90/92/95 RON gasoline)

+ Domestic jet / fuel oil

+ Automotive diesel fuel (DO )

+ Fuel oil (FO)

Fuel Oil (FO) 300 - 350

Fuel for the plant/jet 470 - 490

Table 1.2: Product’s Capacity

Product quality: For products consumed domestically in accordance with product

quality standards of Vietnam For export products must reach the requirements ofexport quality

When reached the maximum capacity, Dung Quat Refinery will produce 150,000 tons

of petrol, 240,000 tons of diesel, about 23,000 tons of LPG and other products such aspropylene over 8,000 tons, Jet-A1 gasoline (about 30,000 tons) and FO oil (about25,000 tons) Dung Quat refinery will meet about 30% of petroleum demand in thecountry, step by step ensure the number one spot of national energy providing

Chapter 2 - Introduction of Crude Distillation Unit (CDU)

2.1 Introduction of Crude Distillation Unit (Unit 011) of Dung Quat

Refinery

The Crude oil Distillation Unit (CDU) can be considered as a "gateway" workshop of

a refinery that separates crude oil into smaller segments at different boiling points.The CDU plant of Dung Quat Refinery is designed with a capacity of 6.5 million tons

of crude oil per year, equivalent to 812,500 kg / h (calculated for 8,000 hours peryear)

The CDU is designed to operate on two sources of oil: Bach Ho Oil of Vietnam andDubai Oil of the foreign Middle East According to plans, in the first phase ofoperation, the plant will use 100% raw material of Bach Ho crude oil And then usethe mixed oil source of 84.6% Bach Ho Oil and 15.4% Dubai Oil

CDU's products included Offgas, LPG, Full Range Naphta, Kerosene, LGO, HGO andatmospheric distillate residues Most of the CDU's products go to other units such asUnit 012 - NHT ( Naphta Hydrotreatment Unit), Unit 014 - KTU ( Kerosen TreatingUnit), Unit 015 - RFCC ( Residue Fluidised Catalytic Cracking Unit) The diagram

of the workshops of Dung Quat Oil Refinery is shown in Figure below

Figure 2.1 Crude Distillation Unit (Unit 011) of Dung Quat Refinery

According to the Figure 1, the area covered with a rectangular frame is theatmospheric distillation CDU With two main units are the T-1101 (MainFRACTIONATOR) and the T-1107 (Stabilizer).

As you can see on the plant figure, the crude oil stream passing through the PreheaterSystem and the Salt Separater then moving to the main fractionator ( T-1101 ) In herethe crude oil will be separate into some main products:

- Light products output from the top of the CDU distillation column is fed through theRFCC processing unit and then through the liquefied petroleum gas (LPG) treatmentplant

- The naphtha feed is taken to the Naphtha treatment plant processing by hydrogenand then goes to the naphtha separation tower, where Naphtha is split into lightnaphtha and heavy naphtha

- Light naphtha from the separation tower is taken to the Isomerization unit

- Heavy Naphtha from the separation tower is taken to the Continuous ReformingCatalytic Unit

- Kerosene stream from the atmospheric distillation unit is delivered directly to theKerosene tankge storage or used as a mixing material for diesel and fuel oil, or it istransported to a Kerosene treatment plant ( KTU) In the KTU the content ofmercaptan (RSH), hydrosulfide (H2S) and naphthenic acid (RCOOH) are reduced andwater removed The treated Kerosene was then taken to the reservoir where it wasused as jet fuel JetA1

- The LGO from the atmospheric distillation plant is injected directly into the Dieselblending system and finally to the storage tank at the Product tankages

- The HGO is pumped to the storage tank at the plant through pipes system, fromwhich it is pumped to the diesel /fuel oil blending system

- The residues from the CDU was transferred to the RFCC to upgrade to higher valueproducts

3D strucuture of Crude Distillation Unit with the view of South East and West East areshown in these figure below:

Figure 2.2: 3D strucuture of Crude Distillation Unit from South East

Figure 2.3: 3D sstrucuture of Crude Distillation Unit from West East

2.2 Mission of Crude Distillation Unit (Unit 011)

The purpose of the CDU workshop is to separate preliminary crude oil to produceproducts as raw materials for subsequent processing units and the direct mixingconstituents for some products

Crude oil is heated by the product streams and the flow circulating reflux(Pumparound) before being taken to the furnace heater Preliminary separationprocess crude oil is conducted in the main separated tower and the side separatedseparation tower (Stripper) Naphtha line separated from the main tower Tl-101are brought to a stable tower gas (Stabilizer) Tl-107 The other product is cooledbefore being put straight to intermediate storage tanks or workshops forappropriate depth processing Particularly, LGO and HGO are dried by vacuumbefore being transported to an intermediate storage tank or LCO-HDT unit

The workshop is designed to operate two types of crude oil:

+ 6.5 million tons / year with White Tiger Oil (sweet oil)

+ 6.5 million tons per year with Dubai oil (sour oil)

In addition, an operating case based on mixed oil mixes between 84.6% of Bach HoOil and 15.4% of Dubai Oil So, the Jet AI product’s standard for dew point anddensity may be achieved in mixed oil processing

2.3 Characteristics of the Crude Oil input

2.3.1 Bach Ho Oil

Bach Ho crude oil is a light oil with an API of 39.2 and a low sulfur content of 0.03% White Tiger Oil is a Paraffin Oil White Tiger Oil gives average naphtha yieldsand intermediate distillation and high vacuum gas oil yields White Tiger Oil is high quality crude oil; Low elemental content is suitable for refineries with cracking

process

 Distillation Curve

Properties of Bach Ho crude oil’s segments are shown in the table below:

Table 2.1: Distillation Curve and Propotion Curve of Bach Ho Crude oil

Properties of elemental Ingredients

 Distillation Curve

Properties of Dubai crude oil’s segments are shown in the table below:

Table 2.2: Distillation Curve and Propotion Curve of Dubai Crude oil

Properties of elemental ingredients

Temperature o C % Mass %Distillation Density

Standard Value Processing Method

Total C4 in Full Range

Naphtha

The gap between 5%vol

of Kerosene and 95%vol

of Full Range Naphtha

The gap between 5%vol

of LGO and 95%vol of

Kerosene

The OVERLAP between

95%vol LGO and 5%

vol HGO

The amount of residue

 The main towers in Crude Distillation Unit

• Main Disillation Tower: T-1101

• Stabilizer equipment: D-1104 and D-1105

• Drier Tower: T-1105 and T-1106

2.5 Description of CDU processing technology

Crude oil after being heat exchanged with hot streams comes from the distillation column, then being heated from the heater and fed to the distillation tower In the crude distillation segment, beside the main distillation column T-1101, there are other types of other devices such as: separation equipments, stable equipment, or salt

separator

2.5.1 Preheater for Crude oil input

Crude oil is pumped from the storage tank to the crude oil distillation unit by the 6001A / B / C feed pump When entering the workshop, crude oil is heated in two rows of heat exchangers (two parallel branches) At the first heat exchanger,

P-The temperature of crude oil is raised from 50 ° C to 138° C with the raw materials input of Bach Ho crude oil and 133 ° C, with the raw materials input of Dubai crude oil In order to keep the output temperature of the crude oil in two parallel branches equal, the crude oil flows in each of the branches is controlled by the 011-TV-007A and 011-TV-007B control valves located at the input of each heat exchanger

equipments El 101 and El 102 Then the crude oil goes into two Salt seprator devices.After leaving the salt separator, crude oil is pumped by P-101A / B to the Hot Preheat

Crude Train, the temperature of the crude oil is raised from 136/13 l ° C to 283/277 °

C depend on the raw materials of Bach Ho and Dubai crude oil To maintaining the temperature of oil output in each branches The crude input is controlled by two

control valves 011- TV-015A and 011-TV-015B which located at the input of the heat exchangers E-1105A-J and E-1106A-R

Summary of heat exchangers as well as hot product lines are used in each heat

exchanger is shown in the table below: ( Table 2.4)

Heat Exchangers

Cooled-Preheater

E-1101A-HExchange with distillation residue from

E-1105

E-1102Exchange with the Kerosene pumparoud from pump P-l 103

E-1Í03A/BExchange with LGO from tower

T-1103

E-1104Exchange with HGO from E-1107

Hot Preheater

E-1105A-JExchange with distillation residue from

E-1108

E-1106A-FExchange with LGO pumparoud from pump P-1104

E-1107Exchange with HGO from tower

T-l 104

E-1109Exchage with the HGO pumaroud from

pump P-l 105

E-1108A-D Exchange with distillation residue fromE-1134

E-1134 A/B Exchane withe distillation residue from

pump P-1106

Table 2.4: Summary of heat exchangers as well as hot product lines