Denitration system for cement production

Abstract

The invention discloses a denitration system for cement production. The denitration system comprises a raw material preheater, a cyclone feeder, a cyclone mixer, a reductant atomizer, a reductant and atomizing agent pressurizer and a combustion furnace. The cyclone feeder is fixedly connected with a material outlet of the raw material preheater, a material outlet of the cyclone feeder is communicated with one side of the cyclone mixer, and the other side of the cyclone mixer is communicated with the reductant and atomizing agent pressurizer; the reductant and atomizing agent pressurizer is communicated with a material outlet of the reductant atomizer, the lower portion of the reductant and atomizing agent pressurizer is communicated with the combustion furnace, the lower portion of the reductant atomizer is communicated with the combustion furnace, and the lower portion of the cyclone mixer is communicated with the upper portion of the combustion furnace. The denitration system has the advantages that the waste heat of the combustion furnace can be fully utilized, and less nitric oxide is generated in the combustion process.

Description

technical field [0001] The invention relates to cement production, in particular to a denitrification system for cement production. Background technique [0002] As a building material, cement has a particularly large production capacity, and the production process of cement is usually calcined. During the calcining process, due to the combustion of nitrogen in the air, a large amount of nitrogen oxides are produced. Nitrogen oxides are harmful to the environment. Air pollution is particularly serious. Nitrogen oxides in the air easily generate nitric acid and acid rain. The cement out of stock in the prior art usually adopts the SNCR denitrification system, which mainly uses the method of mixing the reducing agent to reduce the nitrogen oxides, and the reducing agent is difficult to mix fully by direct spraying and mixing in the prior art, and because the reducing agent It will contain a lot of dust, which will easily lead to insufficient mixing and insufficient reduction....

AI Technical Summary

Problems solved by technology

The cement out of stock in the prior art usually adopts the SNCR denitrification system, which mainly uses the method of mixing the reducing agent to reduce nitrogen oxides, and the reducing agent is difficult to mix fully by direct spraying and mixing in the prior art, and because the reducing agent It will contain a lot of dust, which will easily lead to insufficient mixing and insufficient reduction.

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