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Device for reducing nitric oxide in coke oven flue gas through exhaust gas circulation

A technology of coke oven flue gas and nitrogen oxides, applied in incinerators, regulating fuel supply, combustion methods, etc., can solve problems such as high nitrogen oxide content

Pending Publication Date: 2018-11-30
SHANXI HEIMAO JIAOHUA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a device for reducing nitrogen oxides in coke oven flue gas through exhaust gas circulation, so as to solve the problem of high nitrogen oxide content in flue gas

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  • Device for reducing nitric oxide in coke oven flue gas through exhaust gas circulation

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] The invention discloses a device for reducing nitrogen oxides in coke oven flue gas through waste gas circulation, such as figure 1 As shown, it includes a PLC control board 1, and the PLC control board 1 is connected to two industrial computers 2 respectively. It is connected to the single-heating coke oven 4, and the external circulation system of the reheating coke oven is connected to the reheating coke oven 3. Each operation of the single-heating coke oven 4 or the reheating coke oven 3 can be controlled through the corresponding industrial computer 2 to realize automatic control, and the operation is simple and convenient. The PLC control board 1 and two industrial computer 2 form an automatic control system. The main control unit of the automatic control system adopts Siemens PLC (S7-300) system, and the 1 / 0 point shrinkage is ...

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Abstract

The invention discloses a device for reducing nitric oxide in coke oven flue gas through exhaust gas circulation. The device comprises a PLC control panel. The PLC control panel is connected with twoindustrial personal computers. The two industrial personal computers are connected with a single heating coke oven outer circulation system and a reheating coke oven outer circulation system. The single heating coke oven outer circulation system is connected with a single heating coke oven. The reheating coke oven outer circulation system is connected with a reheating coke oven. The air is provided for the single heating coke oven and the reheating coke oven through a first waste gas mixing unit and a second waste gas mixing unit correspondingly and mixed with coke oven waste gas. The mixing ratio is adjusted by adjusting the opening degree of a gate plate. The flame center temperature of a coke oven burning point can be reduced so as to control the generation amount of NOX and achieve low-nitrogen burning.

Description

【Technical field】 [0001] The invention belongs to the technical field of tail gas purification in the coking industry, and in particular relates to a device for reducing nitrogen oxides in coke oven flue gas through waste gas circulation. 【Background technique】 [0002] When coke oven gas is burned in the coke oven combustion chamber, nitrogen oxides (NO x ), NO x Usually refers to the mixture of NO and NO2. Nitrogen oxides discharged into the atmosphere will destroy the ozone layer, cause acid rain and pollute the environment. In the mid-1980s, developed countries regarded it as a harmful gas and proposed emission control standards. With the rapid development of my country's economy, the harm of nitrogen oxides emitted by coke ovens has been paid more and more attention, and emission control standards have been formulated. At present, my country's coke oven chimney gas NO x The emission standard implemented is the limit value of 500mg / Nm 3 , "special area" coke oven ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/44F23G7/06F23N1/00
CPCF23G5/44F23G7/06F23N1/005
Inventor 史军伟虎骁司少龙蒙少科张引成
Owner SHANXI HEIMAO JIAOHUA CO LTD
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