Coke oven flue gas multi-pollutant dry purification device and process

Abstract

The invention relates to a coke oven flue gas multi-pollutant dry purification device. The device consists of an evaporator I, a desulfurizer adding apparatus, a cloth bag dust collector, and a mediumand low temperature SCR denitration reactor. The evaporator I is a heat pipe type evaporator, the desulfurizer adding apparatus is connected to a desulfurizer grinding and conveying system, and the desulfurizer grinding and conveying system consists of a desulfurizer powder bin, a Roots blower and a desulfurizer pulverizer. The cloth bag dust collector includes a filter bag chamber, the filter bag chamber includes a dust remover ash hopper, a dust remover middle box and a purified air chamber that are disposed from the bottom up in order, the dust remover middle box is internally equipped with a tubesheet, a filter bag is disposed on the tubesheet, and a pulse dust-cleaning apparatus is disposed above the filter bag. An air outlet of the cloth bag dust collector is connected to an air inlet of the medium and low temperature SCR denitration reactor, an air inlet pipeline of the medium and low temperature SCR denitration reactor is internally equipped with an ammonia injection grid anda guide plate II, and a flue gas current equalizer, a catalyst reservation layer and a catalyst layer are disposed below the guide plate II in order.

Description

technical field [0001] The invention belongs to the field of integrated high-efficiency control of coke oven flue gas multi-pollutants, and in particular relates to a coke oven flue gas multi-pollutant dry purification device and process. Background technique [0002] Due to the production of coke ovens containing dust, SO 2 , NO x and other harmful substances will pollute the environment. With the increasingly stringent environmental protection emission standards and the increasing efforts of the country to control pollution, the treatment of coke oven flue gas has gradually been paid attention to. The GB16171-2012 "Emission Standards for Pollutants in the Coking Chemical Industry" promulgated by the Ministry of Environmental Protection has made the following strict regulations on the emission of coke oven chimneys in key areas: the emission concentration of particulate matter is less than or equal to 15mg / m 3 , the emission concentration of sulfur dioxide is less than o...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the deficiency of existing coke oven flue gas treatment, the present invention discloses a coke oven flue gas multi-pollutant dry-type purification device and process, which can not only eliminate fine particle dust in coke oven flue gas, SO 2 , NO X etc. for dry purification treatment, and has the advantages of small total investment, zero water consumption in the system, no desulfurization tower, low energy consumption in operation, small footprint, simple process, small maintenance, and long service life of the catalyst.

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