Low-temperature denitration and desulfurization device for coking furnace flue gas and process

Abstract

The invention discloses a low-temperature denitration and desulfurization device for coking furnace flue gas and a process and belongs to the technical field of pollutant treatment of flue gas of a coking furnace in the coking industry. The device mainly comprises a denitration reactor, a reheater, an induced draft fan, a desulfurizing tower, a desulfurization absorption liquid heat exchanger, an ammonium sulfate mother liquor tank, an ammonium sulfate mother liquor circulating pump, a desulfurizing liquid circulating pump and a desulfurizing liquid metering and conveying pump. The coking furnace flue gas is denitrated by the denitration reactor, heat exchange of high and low temperature coking furnace gas is performed by the aid of the reheater, desulfurization is performed by the aid of a desulfurization absorption, and finally, low-temperature denitration and desulfurization purification treatment of the coking furnace flue gas is completed. The low-temperature denitration and desulfurization device has the advantages as follows: resources of a coking plant are sufficiently utilized, the idea of treating waste with waste is realized, and continuous and stable production of the coking furnace is guaranteed while the working condition of the coking furnace flue gas and the denitration and desulfurization requirements are met through a pilot plant test and an industrialized application test.

Description

technical field [0001] The invention belongs to the technical field of coke oven flue gas pollutant treatment in the coking industry, and in particular relates to a coke oven flue gas low-temperature denitrification and desulfurization device and process. In particular, nitrogen oxides (NOx), sulfur dioxide (SO 2 ) processing method. Background technique [0002] According to coking principle of coke oven and NO in coke oven flue gas X , SO 2 The generation mechanism of other pollutants, the analysis shows that the NO in the coke oven flue gas X , SO 2 The content of pollutants such as pollutants can only be controlled and reduced, but cannot be avoided. To meet the emission requirements stipulated in the "Emission Standards of Pollutants for the Coking Chemical Industry" (GB16171-2012), the NO in the coke oven flue gas must X , SO 2 The pollutants such as denitrification and desulfurization purification treatment can be discharged up to the standard. [0003] In rec...

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Problems solved by technology

[0005] The object of the present invention is to provide a coke oven flue gas low-temperature denitrification and desulfurization device and process, which solves the problem of NO in the coke oven flue gas. X , SO 2 The problem of non-compliance with emissions

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