High-temperature flue gas dedusting and denitration integrated device

Abstract

The invention provides a high-temperature flue gas dedusting and denitration integrated device. The device comprises a flue gas inlet pipe, an ash bucket, a dedusting and denitration tank, a plurality of synthetic filter cores, a filter core fixing plate, a flue gas outlet pipe, an ammonia spraying device and a back blow dedusting system. The synthetic filter core comprises a dust removal layer and a denitration layer. The dust removal layer is a ceramic membrane. The denitration layer is a honeycomb-like SCR high temperature catalyst. The synthetic filter core is arranged in a lower chamber and is fixedly connected to a fixing plate opening. The ammonia spraying device is arranged at the flue gas inlet pipe. The back blow dedusting system comprises an electromagnetic pulse valve connected to a high pressure air source, a blowing pipe and a control device. A part of the blowing pipe part is arranged in an upper chamber. The device combines dust removal and denitrification. The flue gas is subjected to dust removal and then is denitrified at a high temperature so that dust and nitrogen oxides are removed at the same time, a space is saved, an individual denitration system is avoided and an equipment investment is low.

Description

technical field [0001] The invention relates to the technical field of flue gas purification equipment, in particular to an integrated device for dust removal and denitrification of high-temperature flue gas. Background technique [0002] Nitrogen oxides are the main component of air pollution. At present, coal-fired power plant boilers in thermal power plants mainly use Selective Catalytic Reduction (SCR) to remove nitrogen oxides in flue gas. SCR has a high denitrification efficiency, which can reach 80 ~90% removal rate. Most SCR catalytic reaction systems at home and abroad use TiO 2 as the carrier and V 2 o 5 or V 2 o 5 -WO 3 or V 2 O5-MoO 3 It is a high-temperature catalyst with an active component. The optimal reaction temperature of the catalyst is 320-420°C. If the reaction temperature is low, the activity of the catalyst will decrease, resulting in a decrease in denitrification efficiency. Sexual damage, if the reaction temperature is too high, the NH in t...

AI Technical Summary

Problems solved by technology

In this patent, the inorganic filter element dust collector and the denitrification system are set separately, and the flue gas first passes through the dust collector and then enters the out-of-stock system, which makes the entire dust-removal system occupy a large area and high production cost

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