SCR denitration reaction platform

Abstract

Disclosed is an SCR denitration reaction platform. The reaction platform comprises a support frame; an SCR denitration reactor and a plurality of storeys of stairs are fixed in the support frame; the SCR denitration reactor comprises a reactor body, which is equipped with a gas inlet and a gas outlet; an ash hopper is arranged at the bottom of the reactor body; a plurality of layers of denitration catalysts are arranged inside the reactor body; a gas inlet flue is connected to a gas inlet end of the reactor body through a corner flue; an ammonia spraying device is arranged in the gas inlet flue; a flue gas guiding device is arranged in the corner flue; the ammonia spraying device comprises an ammonia gas conveying pipe and a plurality of ammonia spraying pipes; a plurality of ammonia spraying holes which are distributed along an axial direction are arranged in each of the ammonia spraying pipes; and a baffle and a flow guiding plate which correspond with each ammonia spraying hole are arranged on one corresponding ammonia spraying pipe to ensure full mixing of sprayed ammonia gas and flue gas. The SCR denitration reaction platform provided by the invention has compact spatial arrangement, so that the SCR denitration reaction platform is convenient for workers to work up and down and carry goods, effectively increases the reaction efficiency of the SCR denitration reactor, reduces the escaping volumes of nitrogen oxides and ammonia gas, and thus saves the production cost.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification, in particular to an SCR denitrification reaction platform. Background technique [0002] At present, the most widely used flue gas denitrification technology in domestic and foreign power plants is the selective catalytic reduction process. Generally, by building an SCR denitration reaction platform composed of a supporting frame and an SCR denitration reactor, and performing denitration treatment in the SCR denitration reactor, the SCR denitration reactor has a reactor body, and the reactor body has an upper air inlet and a lower air inlet. The side air outlet is equipped with an ash hopper at the bottom. The reactor body is equipped with a multi-layer denitrification catalyst, and the air inlet is connected to the intake flue through an angled flue, and an ammonia injection device is installed in the intake flue. , There is a flue gas guiding device in the corner flue. The ma...

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Problems solved by technology

[0003] However, the existing SCR denitrification reaction platform has a complex structure and unreasonable design, and it is inconvenient for the staff to go up and down and carry goods, and another sootblower platform must be set up to support each sootblower, which not only costs high, but also takes up a lot of space. Moreover, due to the unreasonable design of the ammonia injection device installed in the intake flue and the flue gas guide device in the angled flue, the denitrification efficiency of the SCR denitrification reactor is low and the ammonia escape rate is high, thereby increasing the cost of the denitrification reaction , also cause harm to the surrounding environment

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