High-temperature desulfurization denitration flue gas dedusting system based on catalyst filter unit

Abstract

The invention discloses a high-temperature desulfurization denitration flue gas dedusting system based on a catalyst filter unit. The system comprises a lime storage and transportation part, an ammonia gas supply part, a desulfurization part, a catalyst filter part, a slaked lime circulation part and a by-product collection part, wherein slaked lime is taken as a desulfurization catalyst, ammoniagas is taken as a denitration catalyst, and flue gas is subjected to desulfurization and denitration in the desulfurization part and the catalyst filter part separately; a catalyst filter dedustor canbe used to control nitrogen oxides and particulate matter within a standard range; and at the same time, through combination of dry desulfurization and a slaked lime circulation process, SO2 emissionreaches a standard at a lower Ca / S value condition.

Description

technical field [0001] The invention relates to the technical field of glass melting furnace flue gas treatment, in particular to a high-temperature desulfurization and denitrification flue gas dust removal system based on a catalyst filter unit. Background technique [0002] In 2017, the "Emission Standards of Air Pollutants for the Flat Glass Industry" (GB 26453-2011) revision sheet (draft for comments) was promulgated. In areas where the density of land development is high and the environmental carrying capacity begins to weaken, or the capacity of the atmospheric environment is small and the ecological In areas where the environment is fragile and serious air pollution problems are prone to occur and special protection measures are required, the pollution discharge behavior of enterprises should be strictly controlled. It also stipulates that enterprises in the above-mentioned areas implement special emission limits of air pollutants as follows: [0003] Glass melting f...

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Problems solved by technology

[0007] In recent years, at present, the catalytic filter unit can solve dust removal and denitrification very well, and can reduce the concentration of particulate matter in the flue gas to 5mg / m 3 Below, the concentration of nitrogen oxides can be reduced to 50mg / m 3 Below, it can fully meet the existing emission standards, and even meet the requirements of ultra-low emissions; but its desulfurization effect is low, if only relying on the desulfurization effect of the lime particle cake layer, it can only make the flue gas of glass melting furnaces fueled by natural gas Meet SO in the current "Emission Standard of Air Pollutants for Flat Glass Industry_GB26453-2011" 2 The emission limit is 400mg / m 3 , for high concentration SO 2 Furnaces or areas with more stringent emission targets, unable to achieve up-to-standard emissions

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