Energy saving and emission reduction comprehensive purifying treatment technology of coke oven flue gas

Abstract

The invention relates to an energy saving and emission reduction comprehensive purifying treatment technology of coke oven flue gas, and belongs to the technical field of metallurgy coking industry energy saving and emission reduction. An apparatus for enforcing the technology comprises a coke oven flue gas leading-out regulating valve, an induced draught fan, a waste heat recovery system, a flue gas dedusting system and a coke oven flue gas low temperature oxidation absorption system. The technology comprises the following steps: the coke oven flue gas goes through the leading-out regulating valve and the induced draught fan and enters the waste heat recovery utilization system to recovery waste heat of the flue gas and make the temperature of the flue gas decrease to below 150DEG C from 320DEG C, the cooled flue gas enters the flue gas dedusting system to reduce the dust particle content to below 30mg / Nm<3> from 150mg / Nm<3>, and the dedusted flue gas enters the low temperature oxidation absorption system to carry out desulphurization and denitration purifying treatment in order to reduce the SO2 and NOX content of the flue gas with the integral desulphurization and denitration efficiency being 85% or above in order to realize the coke oven flue gas energy saving and emission reduction comprehensive treatment purposes. The technology has the advantages of high coke oven flue gas waste heat recycling efficiency and good comprehensive purification effect.

Description

technical field [0001] The invention belongs to the technical field of energy saving and emission reduction in the metallurgical coking industry, and in particular relates to a comprehensive purification treatment process for energy saving and emission reduction of coke oven flue gas. In particular, it can realize the low-temperature oxidation, absorption, desulfurization and denitrification integrated device of coke oven flue gas. Background technique [0002] According to the understanding of the coke oven flue gas in some independent coking plants, because the coke oven has been used for several years, the carbonization chamber has different degrees of leakage, and the temperature of the coke oven flue gas is 230 ° C ~ 320 ° C; SO 2 The content is 250mg / Nm 3 ~380mg / Nm 3 ;NO X The content is generally 1000mg / Nm 3 ~1600mg / Nm 3 , of which 90% is NO; dust particle content is generally 80mg / Nm 3 ~150mg / Nm 3 , These parameter values ​​far exceed the requirements of the e...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a coke oven flue gas energy saving and emission reduction comprehensive purification treatment process, which solves the problem of NOx, SO 2 The problem of substandard emissions

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