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- 蒸汽加热消白系统 Flue gas condensation - steam heating and whitening system

Reducing the temperature of saturated wet flue gas can reduce the temperature required for heating and save energy consumption. 20t/h 锅炉的 5 0 对应的 3 10000Nm3/h 的烟气量为例 如果通过冷凝降低到 4 5 可以产生 7 .7t/h 的凝结水 Taking the flue gas amount of 3 10000 Nm3 / h corresponding to 50 ℃ of a 220 t / h boiler as an example , if it is reduced to 45 by condensation , it can produce 7.7 t / h of condensed water . The condensed water can be recovered as the process water of the desulfurization tower. M2.5 的排放是非常有利的 As the water vapor of the flue gas needs to be condensed with fine dust when condensing, this is very beneficial for reducing PM2.5 emissions .


冷凝器 湿烟气可用循环冷却水进行冷凝 吸热后的冷却水通过冷却塔冷却 Condenser wet flue gas can be condensed with circulating cooling water , and the cooling water after heat absorption is cooled by a cooling tower . 因此需要大量的循环水 Because the heat released by the condensation of the flue gas is very large , a large amount of circulating water is required . - 蒸汽加热的烟气消白系统如下图所示 Flue gas condensation - steam heated flue gas whitening system is shown in the following figure :

布置在脱硫塔后面,湿电前面,将烟气温度由 5 0 以上冷却到 4 5 左右 The condenser is arranged behind the desulfurization tower and in front of the wet electricity, and the flue gas temperature is cooled from above 50 ℃ to about 45 . 可用 S S2205 P TFE 材质制作 The condensed water of the condenser is weakly acidic, which can be used directly for desulfurization process water or treated as reclaimed water. The condenser can be made of S S2205 or P TFE material .

加热器 Heater

,用蒸汽加热,疏水进入除氧器回收利用。 The heater is arranged between the wet electricity and the chimney , is heated by steam, and drains into the deaerator for recycling. 5 ℃的烟气加热到7 5 ℃, 即可消除白烟 White smoke can be eliminated by heating the flue gas at 45 ° C to 75 ° C. S2205或 N D钢材质 制造。 The heater can be made of S S2205 or ND steel .

冷却塔 Cooling tower

单独制造,也可以利用电厂原有的冷却塔。 The cooling tower can be manufactured separately with ordinary FRP material , or the original cooling tower of the power plant can be used. Circulating water must be monitored and treated to avoid condenser structure or blockage. 8 -- 46 ℃,由于与烟气温差小,冷凝器需要很大的换热面积。 The temperature of the inlet and outlet water of the cooling tower of the power plant is generally 3 8-46 ℃ in summer . Due to the small temperature difference from the smoke, the condenser needs a large heat exchange area. 2 - 40 ℃。 The water temperature of a separate cooling tower in summer can be lower, such as 3 2-40 ℃.

20t/h 锅炉湿烟气在 5 0 降到 4 5 ,再加热到 7 5 ,系统主要参数如下表: 2 When the wet flue gas of a 20t / h boiler is reduced from 50 ° C to 45 ° C , it is heated to 75 ° C. The main parameters of the system are as follows:

project

unit

Flue gas condenser

Flue gas heater

Cooling Tower

Flue gas inlet and outlet temperature

-- 45 50-45

5--75 4 5--75

2 -- 40 Water 3 2-40

Media type

 

Recycled water

steam

Recycled water

Media parameters

 

0 2 0

.8MPa250 0 .8MPa250

 

Media flow

/h t / h

Water 622

7

22 Water 6 22

Heat transfer

W K W

5800

3560

 

Heat exchange element

 

S2205 S S2205

S2205 翅片管 S S2205 finned tube

FRP

Heat exchange area

M2

2100

000 1 000

 

equipment weight

t

40

18

 

Module smoke resistance

Pa

400

160

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