Pulverizing system and method

Abstract

The invention relates to a pulverizing system and method, and the system is carried in a boiler system. The pulverizing system comprises an air and pulverized coal homogenizing coal mill which is connected to the boiler system through a plurality of pulverized coal pipelines; a pulverized coal concentration regulating valve, a pulverized coal flow regulating valve, a pulverized coal concentrationdetection sensor and a pulverized coal flow detection device are sequentially mounted on each pulverized coal pipeline from the end close to the air and pulverized coal homogenizing coal mill to the boiler system end; and a control system is carried on an industrial personal computer, and the control system is electrically connected with the air and pulverized coal homogenizing coal mill, the pulverized coal concentration regulating valves, the pulverized coal flow regulating valves, the pulverized coal concentration detection sensors, the pulverized coal flow detection devices, as well as anin-boiler flame detection sensor, a flue gas fly ash carbon content detection sensor, a flue gas NOX detection sensor and a flue gas CO detection sensor in the boiler system. By comparing target values of the industrial personal computer and combining with pulverized coal concentration, a flow detection signal and coal quality condition on each pulverized coal pipeline, an instruction is sent to each actuator, so that the deviation of air and pulverized coal in each pulverized coal pipeline is reduced, and fine control is achieved.

Description

technical field [0001] The present invention relates to the technical field of powder making equipment, and more specifically relates to a powder making system and method. Background technique [0002] The coal mill and several pulverized coal pipelines connected to it form a pulverizing system. The pulverizing system is responsible for grinding raw coal into pulverized coal with qualified fineness, and transporting it to the boiler for combustion. The primary wind and raw coal enter the coal mill at the same time, and the primary wind carries the pulverized coal into the pulverized coal separator in the pulverizer. After the coarse and fine powder is separated, the primary wind continues to carry the pulverized coal into the pulverized coal pipeline until it enters the boiler. . In order to improve the combustion efficiency of the boiler and the safety of the boiler operation, it is required that the pulverized coal fineness, pulverized coal concentration and pulverized co...

AI Technical Summary

Problems solved by technology

[0007] For this reason, an object of the present invention is to propose a pulverizing system to solve the problem that the state of the air-powder mixture in the prior art cannot be finely controlled, resulting in a large deviation of the air-powder in each pulverized coal pipeline, which in turn leads to economical and poor boiler operation. poor security

Images