Coke oven flue gas comprehensive treatment system based on sodium-based dry process and low-temperature SCR denitration

A comprehensive treatment and basic technology, applied in coke ovens, separation methods, chemical instruments and methods, etc., can solve the problems of high cost, large system resistance, and low flue gas temperature of activated coke method, and avoid local high flow rate and "" The effect of vacuum, reducing selection specifications, and improving desulfurization efficiency
CN108201781AInactive Publication Date: 2018-06-26CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
Publication Date
2018-06-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a coke oven flue gas comprehensive treatment system based on a sodium-based dry process and low-temperature SCR denitration. The coke oven flue gas comprehensive treatment system comprises a cooling mechanism, a desulfurizer supply mechanism, a desulfurizing tower, a bag-type dust collector, an ammonia gas supply mechanism and a denitration tower, wherein the gas inlet of the cooling mechanism is connected with a flue of coke oven flue gas; the gas outlet of the cooling mechanism is connected with the gas inlet of the desulfurizing tower through a first pipeline; the desulfurizer supply mechanism is connected with and arranged on the first pipeline; the gas outlet of the desulfurizing tower is connected with the gas inlet of the bag-type dust collector; the gas outlet of the bag-type dust collector is connected with the gas inlet of the denitration tower through a second pipeline; the ammonia gas supply mechanism is connected with and arranged on the second pipeline; and a regenerative furnace used for heating flue gas is arranged between the ammonia gas supply mechanism and the denitration tower. The system provided by the invention has simple structure, isconvenient to operate, has high removal efficiency to pollutants in the coke oven flue gas, is free of corrosivity, can stably operate for a long time, and has good emission effect and wide adaptationrange.
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Description

technical field

[0001] The invention belongs to the technical field of flue gas treatment, and in particular relates to a coke oven flue gas comprehensive treatment system based on sodium-based dry method and low-temperature SCR denitrification. Background technique

[0002] The coking industry is a heavily polluting industry. In July 2012, the Ministry of Environmental Protection issued the "Coking Chemical Industry Pollutant Discharge Standard", which clearly stipulates the pollutant discharge of the coking industry.

[0003] As one of the key pollution sources of the coking industry, coke oven chimney flue gas has attracted the attention of the Ministry of Environmental Protection. There are three main types of pollutants emitted from coke oven chimneys: SO 2 , nitrogen oxides and soot. For the treatment of these three pollutants, there have been many methods: SO 2 The treatment of nitrogen oxides mainly includes dry method (sodium-based, calcium-based, etc.), semi-dry...

Claims

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