Catalytic reduction type de-nitrification reactor of circulating fluidized bed

Abstract

The invention discloses a catalytic reduction type de-nitrification reactor of a circulating fluidized bed. The catalytic reduction type de-nitrification reactor comprises a reactor housing with a reactor inner cavity, wherein the bottom and the top of the reactor housing are respectively provided with an inlet flue and an outlet flue; the lower part of the reactor inner cavity is provided with an air distribution plate with air distribution holes; a filtering container is arranged above the air distribution plate in the reactor inner cavity and is used for intercepting a catalyst; the periphery and the top of the filtering container are sealed; the lower part of the filtering container is provided with a downward opening; the container wall of the filtering container is provided with filtering holes; a material returning channel in which the catalyst drops is remained between the external surface of the container wall of the filtering container and the inner wall of the reactor inner cavity; material returning openings connected with the material returning channel are formed between an opening edge of an opening of the filtering container and the air distribution plate or formed in the container wall of the lower part of the filtering container. Through the de-nitrification reactor disclosed by the invention, the amount of the catalyst removed from the fluidized bed along with flue gas is greatly reduced, the catalyst can react in the de-nitrification reactor all the time, and the utilization rate of the catalyst is effectively increased.

Description

technical field [0001] The invention belongs to the technical field of flue gas denitrification, and in particular relates to a circulating fluidized bed catalytic reduction denitrification reactor. Background technique [0002] my country is a big country with coal and oil as the main primary energy sources. During the combustion of coal and oil, a large amount of nitrogen oxides (nitrate) will be produced, causing environmental pollution such as acid rain and photochemical smog, which seriously threatens people's health and continues to deteriorate our dependence. To survive in the environment, but also bring huge losses to the national economy. In recent years, the treatment of nitrogen oxides has become the focus of attention. At present, the flue gas denitrification method commonly used in China is selective redox method. [0003] The principle of Selective Catalytic Reduction (SCR) is that under the action of a catalyst, the reducing agent NH 3 At 290-400°C, NO and NO...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a circulating fluidized bed catalytic reduction denitrification reactor to solve the problem that the catalyst in the fluidized bed denitrification reactor is easy to come out of the fluidized bed

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