A combined desulfurization and denitrification fluidized bed device based on activated carbon and low-temperature catalyst

Abstract

The invention relates to the field of industrial flue gas pollution control, and in particular relates to an activated carbon and low temperature catalyst-based combined desulfurization denitration fluidized bed device suitable for fired coal flue gas desulfurization and denitrification in metallurgical industry and power plants and other enterprises. The combined fluidized bed desulfurization denitration device comprises a fluidized bed body characterized by successively comprising from bottom up an air mixing smoke chamber, a denitrification section and a fluidization section, the fluidization section is in horizontal connection with a cyclone dust collector, one end of the air mixing smoke chamber is connected with a flue gas inlet, the bottom of the flue gas inlet is provided with an ammonia inlet, the bottom end of the air mixing smoke chamber is connected with a rotary dust discharge valve, the junction part of the air mixing smoke chamber and the denitrification section is a wind homogenizing plate, a catalyst plate is arranged above the wind homogenizing plate, one side of the denitrification section is provided with an oxidized air inlet and a steam inlet, the bottom of the fluidization section is provided with an air distribution plate, both ends are respectively connected with an activated carbon inlet and a saturated activated carbon discharge port, the top of the cyclone dust collector is a smoke outlet, and the bottom of the cyclone dust collector is connected with a rotary material discharge valve.

Description

technical field [0001] The invention relates to the field of industrial flue gas pollution control, in particular to a combined desulfurization and denitrification fluidized bed device based on activated carbon and a low-temperature catalyst, which is suitable for desulfurization and denitrification of coal-fired flue gas in metallurgical industries and thermal power plants. Background technique [0002] my country is rich in coal resources and is also the world's largest coal producer and consumer. And in our country, about 84% of coal is burned directly. A large amount of coal burning has caused the air pollution mainly of soot type in my country and produced a large amount of SO 2 Environmental pollution such as acid rain, greenhouse effect and ozone depletion caused by these pollutants has seriously affected the living environment of human beings, and has attracted great attention from the country. Desulfurization and denitrification of flue gas has become an important ...

AI Technical Summary

Problems solved by technology

The denitrification efficiency is very low, this is because activated carbon preferentially and selectively adsorbs SO 2 , the physically adsorbed NOx is absorbed by SO 2 Substitution analysis

Activated carbon combined desulfurization and denitrification cannot meet the requirements of existing environmental protection technology, and there is a phenomenon of high ammonia escape rate. The low-temperature denitrification catalyst technology has matured. The combination of low-temperature denitrification technology and activated carbon technology has a very high desulfurization and denitrification rate, and the ammonia escape rate is very low. , is an ideal combined desulfurization and denitrification technology

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