Control system capable of effectively controlling usage amount of ammonia gas

Abstract

The invention discloses a control system capable of effectively controlling the usage amount of ammonia gas, and relates to the technical field of denitration, the control system comprises a control system, the control system is used for regulating, controlling and monitoring the usage amount of sprayed ammonia, the emission amount of nitrogen oxide and the blowback time, and giving an alarm prompt when the usage amount exceeds the standard; a catalyst layer is installed on the inner side wall of the box body, an air inlet pipe is fixedly connected to the top of the box body, an air conveying pipe is fixedly connected to the top of the air inlet pipe, a driving device is installed on the inner side wall of the air inlet pipe, and the driving device is used for providing power for work of the whole equipment; through the use of the control system, the ammonia spraying usage amount can be effectively controlled, the CEMS reverse blowing time can be effectively controlled, the nitrogen oxide emission amount can be effectively monitored, ammonia gas is fully utilized, meanwhile, a flow meter is prevented from being blocked, a powder bin inlet pipe works normally, and the service life of the powder bin inlet pipe is prolonged. And the pipeline is not blocked.

Description

technical field [0001] The invention relates to the field of out-of-stock technology, in particular to a control system capable of effectively controlling the amount of ammonia used. Background technique [0002] The process of removing nitrogen oxides from combustion flue gas and the importance of preventing environmental pollution have been sharply raised as worldwide problems. The more mainstream processes in the world are divided into: SCR and SNCR. There is not much difference between these two processes except that the reaction temperature of SCR is lower than that of SNCR due to the use of catalyst in SCR. However, from the perspective of construction cost and operating cost, the investment of SCR is at least several times that of SNCR, or even More than 10 times. [0003] Now the denitrification system is widely used, the consumption of liquid ammonia continues to increase, which increases the cost of the power plant, and the operating personnel are required to con...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of continuous increase in the amount of liquid ammonia in the prior art, which increases the cost of the power plant, and requires the operator to control the hourly average value of nitrogen oxides at 30 mg / Nm when the unit is in normal operation. 3 up to 40mg / Nm 3 In between, there will be excessive nitrogen oxide emissions in certain periods of time, which will cause a certain degree of environmental pollution, and a control system that can effectively control the amount of ammonia gas used is proposed

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