SNCR denitration system of circulating fluidized bed boiler based on flow-state reconstruction

Abstract

The invention belongs to the technical field of SNCR (Selective Non-Catalytic Reduction) denitration devices of circulating fluidized bed boiler equipment and particularly relates to an SNCR denitration system of a circulating fluidized bed boiler based on flow-state reconstruction. The SNCR denitration system mainly solves the problems of high investment cost and running cost and low denitration efficiency existed in the denitration of the existing boiler. The technical scheme is that the SNCR denitration system comprises a circulating fluidized bed boiler hearth and a circulating fluidized bed boiler separator, as well as an ammonia water unloading and storing system, an ammonia water diluted water delivery system, a mixing and distributing system, a spray injection system and a test system; ammonia water is delivered from a tank wagon to an ammonia water storage tank through a pipeline and an ammonia unloading pump for storing; the test system belongs to a CEMS (Continuous Emission Monitoring System) test system, and an input end of the CEMS test system is connected with the circulating fluidized bed boiler separator. The SNCR denitration system has the advantages of low cost and good denitration effect.

Description

technical field [0001] The invention belongs to the technical field of SNCR denitrification devices for circulating fluidized bed boiler equipment, and in particular relates to a circulating fluidized bed boiler SNCR denitrification system based on fluid state reconstruction. Background technique [0002] With the promulgation and implementation of the national "Emission Standard of Air Pollutants for Thermal Power Plants" GB13223-2011, it is required that the emissions of soot, sulfur dioxide, nitrogen oxides, mercury and their compounds from coal-fired boilers must reach the limit value. For nitrogen oxide emissions, the conventional denitrification system is only for the single removal of boiler emissions, and does not start from the source boiler where the pollution source is generated. There are problems of high investment costs, high operating costs, and low denitrification efficiency. Contents of the invention [0003] The invention mainly aims at the problems of in...

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Problems solved by technology

[0003] The present invention mainly aims at the problems of investment cost, high operation cost and low denitrification efficiency in current boiler denitrification, and provides a circulating fluidized bed boiler SNCR denitrification system based on fluid state reconstruction

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