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Method and device for comprehensively treating pollutants jointly aiming at waste heat recovery of flue gas in coke oven

A technology for comprehensive treatment and waste heat of flue gas, applied in separation methods, chemical instruments and methods, and air quality improvement, etc., can solve the problems of loss of effectiveness of flue gas denitrification process, loss of economy of flue gas desulfurization process, etc., and achieve economical efficiency. removal effect

Active Publication Date: 2012-11-28
BEIJING SPC ENVIRONMENT PROTECTION TECH
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Problems solved by technology

According to the characteristics of coke oven flue gas, in SO 2 Concentration 100~250mg / Nm 3 In the interval of flue gas desulfurization, the traditional flue gas desulfurization process loses its economy; in the range of flue gas temperature below 110~170 °C, the traditional flue gas denitrification process loses its effectiveness, and the flue gas must be heated above 300 °C to work normally

Method used

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  • Method and device for comprehensively treating pollutants jointly aiming at waste heat recovery of flue gas in coke oven
  • Method and device for comprehensively treating pollutants jointly aiming at waste heat recovery of flue gas in coke oven
  • Method and device for comprehensively treating pollutants jointly aiming at waste heat recovery of flue gas in coke oven

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Embodiment Construction

[0022] Such as figure 1 As shown, the process flow of the present invention mainly involves: carbonization chamber 11 , combustion chamber 12 , heat exchanger 13 , pollutant adsorption device 14 , chimney 15 , analytical regeneration equipment 16 , and adsorbent transfer equipment 17 .

[0023] Wherein the carbonization chamber 11 and the combustion chamber 12 are the integral parts of the coke oven itself, wherein the carbonization chamber 11 can serve as the analysis and regeneration equipment 16 in a certain specific embodiment, and the combustion chamber 12 receives heated air and may be modified accordingly, see image 3 . Such changes should be considered within the scope of the present invention.

[0024] The coke oven consists of a carbonization chamber 11 and a combustion chamber 12 arranged at intervals in sequence. The gas burns in the combustion chamber 12 and supplies heat to the carbonization chamber 11 through partition heat transfer. The flue gas produced is ...

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Abstract

The invention relates to a method for jointly removing SOx, NOx and other pollutants aiming at the waste heat recovery of flue gas in a coke oven, which is used for removing harmful substances SOx and / or NOx, HCl (Hydrogen Chloride), HF (Hydrogen Fluoride), mercury and the like in the flue gas. Therefore, the method comprises the following steps: carrying out heat exchange between the combustion flue gas and a cold medium through a heat exchanger, fully mixing with NH3 and flowing through a pollutant adsorption device on which an adsorbent material layer is arranged from bottom to top. The SOx and / or the NOx, the HCl, the HF and the mercury in the flue gas are adsorbed in an adsorbent porous system, and clean flue gas is discharged from the upper part of the adsorption device. A fresh adsorbent is supplemented from the top part of the adsorption device into the adsorption device, an adsorbent of which the adsorption is saturated is discharged out of the adsorption device from the bottom part of the adsorption device, and the saturated adsorbent is returned to the adsorption device for reuse after being analyzed and regenerated.

Description

technical field [0001] The invention relates to the field of coke oven flue gas waste heat recovery combined with pollutant treatment, more specifically, relates to a coke oven flue gas waste heat recovery combined with SO removal x 、No x and other pollutants of the economical and effective process methods and devices. Background technique [0002] Coke oven flue gas contains SO 2 , SO 3 , NO x , heavy metals and other pollutants, causing air pollution, has not been effectively controlled so far. [0003] The traditional flue gas desulfurization and denitrification process is developed for boiler flue gas. The economical and effective working range is 100~150°C (300~400°C for denitrification), SO 2 Concentration 1000~4000mg / Nm 3 range. According to the characteristics of coke oven flue gas, in SO 2 Concentration 100~250mg / Nm 3 In the range where the flue gas temperature is below 110-170°C, the traditional flue gas denitrification process loses its effectiveness, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/06B01D53/78B01D53/60
CPCY02A50/20
Inventor 张开元贾双燕谢飞
Owner BEIJING SPC ENVIRONMENT PROTECTION TECH
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