Selective catalytic reduction (SCR) denitration flow field simulation system and method

Abstract

The invention discloses an SCR denitration flow field simulation system, which comprises an SCR denitration reactor model, a flow measuring device, a deduster, a draught fan and a methane gas jetting device. The SCR denitration reactor model is made by reducing a real SCR denitration reactor according to a ratio of 1:10 to 1:15, and comprises a coal economizer outlet section, the SCR denitration reactor and an air preheater inlet section, wherein the air preheater inlet section is connected to a horizontally arranged measuring pipe. The flow measuring device is arranged on the measuring pipe.The outlet of the measuring pipe is connected to the inlet of the deduster through a structure in which a vertical pipe is connected with a horizontal pipe, and the outlet of the deduster is connected with the draught fan. A three-way switch is arranged on the measuring pipe, and the methane jetting device is connected to an ammonia spraying and mixing section through a jetting pipe. When the system disclosed by the invention is used, a flow field, a pressure field and a concentration field in the SCR denitration reactor can be conveniently measured, the motion of fly ash in the reactor can be really simulated, and a basis is provided for the structural design and optimization of a real reactor.

Description

technical field [0001] The invention relates to the field of denitrification equipment, in particular to an SCR denitrification flow field simulation system, and also to a SCR denitration flow field simulation method. Background technique [0002] For the SCR denitration reaction device, its core is the denitration catalyst. Under the action of the catalyst, the NOx and NH in the flue gas 3 Rapid reaction to generate N 2 and H 2 O. In order to give full play to the catalytic effect of the catalyst, it is necessary to ensure that the flow field distribution of the system is very uniform (including temperature distribution, distribution of ammonia and nitrogen oxides, and flow velocity distribution, etc.). There should be no dust accumulation in the tunnel (severe dust accumulation will cause blockage, increase the pressure loss of equipment, and affect the service life of subsequent equipment), if dust accumulation will directly affect the denitrification efficiency. [0...

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Problems solved by technology

In order to give full play to the catalytic effect of the catalyst, it is necessary to ensure that the flow field distribution of the system is very uniform (including temperature distribution, distribution of ammonia and nitrogen oxides, and flow velocity distribution, etc.). There should be no dust accumulation in the tunnel (severe dust accumulation will cause blockage, increase the pressure loss of equipment, and affect the service life of subsequent equipment), if dust accumulation will directly affect the denitrification efficiency

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