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Ngày tải lên: 26/02/2014, 22:20

... ứng giữa vôi (CaO) và dolomit (CaCO 3 .MgCO 3 ) với SO 2 xảy ra như sau: 2CaO + 2 SO 2 +O 2  2CaSO 4 2CaCO 3 .MgCO 3 + 2SO 2 + O 2  2[CaSO 4 + MgO] + 4CO 2  Phản ứng giữa vôi và SO 2 ... niêm mạc đường khí quản. Khi tiếp xúc với mắt chúng có thể tạo thành axit.  SO x có thể xâm nhập vào cơ thể con người qua các cơ quan hô hấp hoặc các cơ quan tiêu hóa sau khi được hòa tan trong ... đối với sức khoẻ con người, động thực vật, mà còn tác động lên các vật liệu xây dựng, các công trình kiến trúc, là một trong những chất gây ô nhiễm môi trường. Trong khí quyển, khí SO 2 khi gặp các...

Ngày tải lên: 22/04/2013, 16:06

Ngày tải lên: 15/06/2013, 13:15

... [P]=K c E t (s-C a ) 2 cos 2 TNH ÁP SUẤT TÍNH TOÁN CHO PHÉP,[p] Tính chiều dài tính toán của đáy nón,L L=Chiều cao đáy nón Tính đường kính tính toán của đáy nón D α cos 1,09,0 21 tt DD D + = Hay α cos 1,09,0 21 ... trường Cb = 0 Hệ số bổ sung do sai lệch khi chế tạo và lắp ráp : C0 = 0.4 (mm) Hệ số quy tròn bầng 1.499 (mm) Do đó C = 1.5 + 0.4 + 1.499 = 3.399(mm) Khi đó S = S’ +C = 4 (mm) Bề dày thực của ... m n δ η = = Choïn [δ]= Min ( [δ k ], [δ ch ]) = 139.33 *10 6 ( N/m 2 ) ã Be daứy thaựp ủửụùc tớnh theo co ng thửực : S= 4,0 . . 18,1 t DE LP Dt t Trong đó D là đường kính thân,mm. Pn là áp suất...

Ngày tải lên: 02/07/2014, 08:15

... 1.21 FIGURE 11 Economic study plots for life-cycle costs (Power). Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright â 2006 The McGraw-Hill Companies. ... installed cost for the mechanical chilling system for Case 2 is $3-million, or about $3,000,000/18,100 kW ϭ $165.75/kW of added output. Again, costs come from contractor and staff studies. Raw-water consumption ... the plant’s overall O&M costs by $35/ h when the chiller is operating. Disposal of additional cooling-tower blowdown costs $17 / h. The compressor used in Case 2 consumes about 4 MW of auxiliary...

Ngày tải lên: 04/07/2014, 07:20

... pressure in the condenser shell? Calculation Procedure: 1. Sketch the condenser, showing flow conditions (a) Figure 8 shows the condenser and the flow conditions prevailing. 2. Determine the condenser ... valid with constant inlet-water temperature and cooling-water flow rate. It is useful in analyzing condenser operating conditions at other than full load. Single- or multiple-pass surface condensers ... (www.digitalengineeringlibrary.com) Copyright â 2006 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website. STEAM CONDENSING SYSTEMS AND AUXILIARIES STEAM CONDENSING...

Ngày tải lên: 04/07/2014, 07:20

... Preheating Combustion Air 3.4 Combustion of Coal Fuel in a Furnace 3.5 Percent Excess Air While Burning Coke 3.8 Combustion of Fuel Oil in a Furnace 3.9 Combustion of Natural Gas in a Furnace 3.11 Combustion ... burned. 3. Compute the weight or the products of combustion 4. Convert the flue-gas weight to volume The products of complete combustion of any fuel that does not contain sulfur are CO 2 ,H 2 O, ... (www.digitalengineeringlibrary.com) Copyright â 2006 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website. COMBUSTION COMBUSTION 3.5 COMBUSTION OF COAL FUEL...

Ngày tải lên: 04/07/2014, 07:20

... load. Plot the power-consumption curve for each type of control device considered. Calculation Procedure: 1 Determine the types of controls to consider There are five types of controls used for forced- ... hydraulic or electric coupling with constant-speed drive giving wide control over fan speed. 2. Evaluate each type of fan control Tabulate the selection factors influencing the control decision as ... 68.8-ft (21.0-m) diameter, cir- cular-base conical pile. How many tons of coal does the pile contain if its base angle is 36 Њ? How much bituminous coal is contained in a 25-ft (7.5-m) high rectangular...

Ngày tải lên: 04/07/2014, 07:20

... turbine-expansion line. The computed extraction flow for the second-stage heater is not compared with an assumed value because an assumption was not necessary. 6. Compare the actual condenser steam flow Sketch ... and exhaust conditions, or 1375.5 Ϫ 885.3 ϭ 490.2 Btu /lb Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright â 2006 The McGraw-Hill Companies. ... satisfactory, because estimates within 1 percent are considered sufficiently accurate for all routine anal- yses. For the second-stage direct-contact heater, condensate flow, lb/h is as follows: The required...

Ngày tải lên: 04/07/2014, 07:20

... plentiful, desiccant cooling and cogener- ation become attractive. In coupling the continuously available heat-rejection capacity of packaged cogeneration units, Fig. 4, with continuously operating ... demands, the use of integrated components for desiccant cooling, thermal- energy storage, and cogeneration increases. The combination also ensures a rea- sonable constant, cost-effective supply of ... gal/ h consumption, we get the fuel rate ϭ (2320 lb/h)/(7.387 lb/gal) ϭ 315 gal/h (1192 L/h). The daily fuel consumption is then (24 h /day) (315 gal /h) ϭ 7550 gal/ day (28,577 L /day) . In 7 days...

Ngày tải lên: 04/07/2014, 07:20

... these conditions prevail, the savings can be substantial. Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright â 2006 The McGraw-Hill Companies. ... hookup, and other con- ditions peculiar to a given job. Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright â 2006 The McGraw-Hill Companies. All ... curves when the pump is handling the viscous liquid. Calculation Procedure: 1. Determine the required correction factors A centrifugal pump handling a viscous liquid usually must develop a greater...

Ngày tải lên: 04/07/2014, 07:20

... website. PIPING AND FLUID FLOW PIPING AND FLUID FLOW 8.27 dyers, cookers (nonpressure and pressure), cooking coils, cooking kettles, cooking tanks, cooking vats, cylinder dryers, cylinders (jacketed), double-drum ... power, cogeneration, marine, buildings (office, commercial, Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright â 2006 The McGraw-Hill Companies. ... Power Boiler Code and Code for Pressure Piping, ASA B31.1 ) Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright â 2006 The McGraw-Hill Companies....

Ngày tải lên: 04/07/2014, 07:20

... power-cylinder cooling and raw-water cooling for the compressor (Ingersoll-Rand Co. ). FIGURE 9 Closed cooling system for power and air cylinders utilizing pipe coil in the cooling tower (Ingersoll-Rand Co. ). Downloaded ... might be chosen, Fig. 8, combines a heat exchanger for engine power-cylinder cooling and a cooling tower for raw-water cooling for the compressor. Either a natural-draft cooling tower, such as ... recirculated through the cooling tower does not contact the compressor coolant. Where installation costs are critical, raw water can be used to cool the air- compressor cylinders, Fig. 10. The engine...

Ngày tải lên: 04/07/2014, 07:20

... the minimum consistent with safe and dependable conveying of the material. Along with capital cost, the operating and maintenance costs must also be evaluated before a final choice of the conveyor ... system to handle the conveyed product safely. One way around these problems is use of metal-belt conveyors. These are similar in design to conventional rubber and composite-material conveyor belts ... this installation. 5. Compute the required power input to the conveyor The power input to a conveyor is composed of two portions: the power required to move the empty belt conveyor and the power...

Ngày tải lên: 04/07/2014, 07:20

... and for pressure drop. The column on the left lists the conditions to which each equation applies. The second column lists the standard form of the correlation for film coefficients that is found ... and pressure drop. The columns on the left list the conditions to which each equation applies, and the second columns gives the standard forms of the correlations for film coefficients that are found ... fouling on the overall coefficient of heat transfer. (Condenser Service and Engineering Co. , Inc.) 2. Compute the total cooling-water flow rate required Use this relation: total cooling water required,...

Ngày tải lên: 04/07/2014, 07:20

... A COMPOUND COMPRESSION- REFRIGERATION PLANT WITH A WATER-COOLED INTERCOOLER AND LIQUID FLASH COOLER Design a 100-ton (90-t) compound ammonia-compression refrigeration system hav- ing a water-cooled ... air- conditioning first cost should compare favorably with that of a conventional heating plant plus air-conditioning equipment. For this reason, air conditioning should pref- erably be incorporated ... (www.digitalengineeringlibrary.com) Copyright â 2006 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website. REFRIGERATION 12.25 Compressor DX DX Compressor DX DX Cooling...

Ngày tải lên: 04/07/2014, 07:20

Ngày tải lên: 04/07/2014, 07:20

Ngày tải lên: 04/07/2014, 07:20

Ngày tải lên: 04/07/2014, 07:20

Ngày tải lên: 04/07/2014, 07:20