Dry method combined desulfurization and denitration technology and device for activated coke

Abstract

The invention relates to a dry method combined desulfurization and denitration technology and device for activated coke. The desulfurization and denitration device is a multi-section diameter-expanding fluidized bed concurrent with a gravity field. Exhaust gas containing NOx and SO2 firstly enters an ascending flue at the front end of a desulfurizing tower, cooling and humidifying are performed bya water atomizing nozzle, and ozone sprayed in the ascending flue oxidizes NOx and SO2 into high-valent-state NOx and SOx respectively; the exhaust gas enters the top of the fluidized bed and is mixed with the activated coke discharged from a stock bin, and the activated coke is fluidized; the activated coke moves downwards and enters diameter-expanding sections to finish the desulfurization anddenitration adsorption reaction; the exhaust gas enters a gas-solid separation device, the separated activated coke is fed into an desorption tower for regeneration, and enriched NO2 and SO2 gas are obtained respectively; finally, the regenerated activated coke is sent to the stock bin to participate in desulfurization and denitration again. The integrated desulfurization and denitration technology has the advantages of high efficiency, simple process, considerable comprehensive benefits and the like.

Description

technical field [0001] The invention belongs to the field of flue gas pollution control, and in particular relates to a process and a device for combined desulfurization and denitrification by activated coke dry method. Background technique [0002] my country is currently facing severe air pollution problems, and flue gas purification from coal-fired power plants is one of the main ways to reduce air pollution. Nitrogen oxides and sulfur oxides discharged into the atmosphere will cause harm to the environment and people's health, so flue gas desulfurization and denitrification have always been an important part of flue gas purification. Due to the complexity of separate desulfurization and denitrification process equipment and high investment costs, combined desulfurization and denitrification has gradually become the mainstream of development. At present, most coal-fired power plants use a process that combines wet desulfurization with selective catalytic reduction denitr...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low desulfurization efficiency and insufficient utilization of active coke active sites in the above circulating fluidized bed activated coke desulfurization and denitrification process, the present invention provides a process and device for combined desulfurization and denitrification of activated coke with dry process

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