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Device and method for desulfurization of coke oven flue gas

A technology for desulfurization equipment and flue gas, applied in separation methods, lighting and heating equipment, chemical instruments and methods, etc., can solve the problems of high difficulty, complicated extraction process of absorption products, waste heat of flue gas of sulfur absorption equipment not being utilized by components, etc. , to achieve the effect of mature and convenient cycle process, clever combination and easy monitoring

Pending Publication Date: 2020-02-28
SHANXI HEIMAO JIAOHUA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems that the existing coke oven flue gas does not meet the environmental protection emission requirements, the waste heat of the flue gas in the existing sulfur absorption equipment is not utilized by the components, and the extraction process of the absorbed products is complicated and difficult, the present invention provides a coke oven flue gas desulfurization The equipment and method can cooperate closely to improve the desulfurization efficiency; make full use of the heat and sulfur dioxide of the coke oven flue gas, and make the coke oven flue gas meet the environmental protection standard discharge

Method used

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  • Device and method for desulfurization of coke oven flue gas
  • Device and method for desulfurization of coke oven flue gas

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A coke oven flue gas desulfurization equipment, comprising waste heat application equipment 1 and circulation desulfurization equipment 2, the inlet of waste heat application equipment 1 is connected to the outlet of coke oven flue gas, and the outlet of waste heat application equipment 1 is connected to the inlet of circulation desulfurization equipment 2.

[0036] Waste heat application equipment includes an economizer 11 and a waste heat boiler 12; the coke oven flue gas outlet is connected to the heating section of the economizer 11 and the evaporator of the waste heat boiler 12; the boiler water of the economizer 11 is passed into the waste heat boiler 12; The flue gas outlets of coal heater 11 and waste heat boiler 12 are connected with desulfurization equipment 2 .

[0037] Circulation desulfurization equipment 2 comprises desulfurization tower 21 and circulation equipment 22; Desulfurization tower 21 comprises interconnected quench section 211 and SO 2 The absor...

Embodiment 2

[0039] Ammonia escape equipment 3 is also included; ammonia escape equipment includes ammonia escape pump 31, ammonia gas absorption liquid backflow device 33 and ammonia gas absorption liquid nozzle 32; ammonia escape pump 31 inlet is connected with ammonia gas absorption liquid backflow device 33, and outlet is connected with ammonia gas Absorbing liquid nozzle 32; ammonia absorbing liquid reflux device 33 is arranged in desulfurization tower 21 SO 2 Above the absorbing section 212, the ammonia gas absorbing liquid nozzle 32 is arranged above the ammonia gas absorbing liquid reflux device 33 in the desulfurization tower.

Embodiment 3

[0040] Embodiment 3: It also includes a mist removal device 4 , which is arranged above the ammonia gas absorption liquid spray nozzle 32 in the desulfurization tower 21 .

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Abstract

The invention relates to the technical field of environmental protection, specifically to a device and a method for desulfurization of coke oven flue gas. According to the invention, the coke oven flue gas is introduced into a waste heat boiler to recover waste heat; ammonia water is utilized to absorb sulfur dioxide in the flue gas in a desulfurizing tower to generate ammonium sulfite; an ammonium sulfite-containing solution is oxidized to generate ammonium sulfate, and the ammonium sulfate is extracted for industrial application; the problem of environmental unfriendliness due to excess sulfur content in the coke oven flue gas is solved; the method for treatment of the coke oven flue gas is close in matching and high in desulfurization efficiency, fully utilizes heat and sulfur dioxide of the coke oven flue gas, and can enable the coke oven flue gas to reach the emission standard of environmental protection.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a coke oven flue gas desulfurization device and method. Background technique [0002] In the traditional process, the flue gas produced by the heating and combustion system of the coke oven is directly discharged into the chimney, and the flue gas discharged through the chimney contains a large amount of SO 2 , causing pollution to the environment and failing to meet environmental protection requirements. [0003] Most of the sulfur absorption devices in the existing coke oven flue gas treatment system are for one-time use, and there is no flue gas waste heat application process; therefore, after entering the desulfurization system, the flue gas temperature is too high, the excess heat energy is wasted, and the cooling is difficult, and After chilling, a large amount of water vapor is produced, which makes the components in the flue gas more complex and pollutes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/78F22B1/18F22D1/00
CPCB01D53/502B01D53/504F22B1/18F22D1/00B01D2258/0283
Inventor 吉忠民李军吕小光杨军峰薛江安范江辉
Owner SHANXI HEIMAO JIAOHUA CO LTD
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