A co-processing device for desulfurization, denitrification and dust removal

Abstract

The invention provides a desulfurization, denitration and dust-removing cooperative treatment device. The device comprises an air distribution outlet, a combustion furnace, a ceramic filter, a bubbling bed gas filter and an absorber which are communicated with one another sequentially; the absorber comprises a concentration part and an absorption part which are arranged on a lower layer as well asa denitration part which is arranged on an upper layer; the absorption part is used for absorbing an ammonium sulfite solution formed by SO2 in flue gas; the concentration part is used for pumping ammonium sulfate into a concentrated liquid spraying layer through a concentration pump, so that the ammonium sulfate is concentrated while the temperature of the flue gas is reduced, and ammonium sulfate slurry with the solid content of 5 to 15 percent is obtained; the denitration part is communicated with an ammonia gas conveying pipeline and a thermal desorption gas conveying pipeline; the denitration part is also provide with a denitration catalyst adding port; and the temperature of the thermal desorption gas is controlled to be about 400 DEG C, so that denitration reaction is accelerated,ammonium bisulfate adhering to the surface of the catalyst is decomposed and the surface of the catalyst is purified. The desulfurization, denitration and dust-removing cooperative aim can be fulfilled.

Description

technical field [0001] The invention relates to the field of environmental protection machinery, in particular to a desulfurization, denitrification and dust removal cooperative processing device. Background technique [0002] Exhaust gas refers to the poisonous and harmful gas emitted by human beings in the process of production and life. Especially in chemical plants, steel plants, pharmaceutical plants, coking plants and oil refineries, etc., the exhaust gas emitted is very smelly, which seriously pollutes the environment and affects human health. [0003] There are many types of pollutants in exhaust gas, their physical and chemical properties are very complex, and their toxicity is also different. The exhaust gas discharged from fuel combustion contains sulfur dioxide, nitrogen oxides (NOx), hydrocarbons, smoke and so on. Air pollution by exhaust gas is one of the most common and serious environmental problems in the world. [0004] In the conventional process, desul...

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Problems solved by technology

[0004] In the conventional process, desulfurization, denitrification and dust removal are completed in their own devices as independent unit operations. This independent exhaust gas treatment process is costly, wastes space, and the process is complicated. Therefore, it is necessary to develop a desulfurization and denitrification process. Dust removal co-processing device, so as to achieve the two purposes of desulfurization, denitrification and dust removal

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