Coal-fired power plant ash conveying control optimization system

Abstract

The invention provides a coal-fired power plant ash conveying control optimization system, and relates to the technical field of ash conveying control. The coal-fired power plant ash conveying controloptimization system is based on an existing ash conveying control system of a coal-fired power plant, and pressure in a compressed air pipeline in an ash conveying system is collected through using an analog quantity input module and transmitted to a main controller; a digital quantity input module is used for collecting the running states of all valves and a motor of the ash conveying system andtransmitting the running states to the main controller; on the basis of realizing the ash conveying control of the original ash conveying control system, the main controller sets initial working parameters and ash conveying circulation time of the ash conveying system, starts automatic ash conveying, acquires the pressure in the compressed air pipeline, unit load and the pressure standing time, then calculates new ash conveying circulation time of the ash conveying system, generates a control instruction and transmits the control instruction to the digital quantity output module; and the digital quantity output module indirectly controls the motor and the valves in the ash conveying system by controlling the action of an intermediate relay, so that the supply allowance of compressed air is reduced, the waste of the compressed air is avoided, and the ash conveying optimization control is realized.

Description

technical field [0001] The invention relates to the technical field of ash delivery control in coal-fired power plants, in particular to an optimization system for ash delivery control in coal-fired power plants. Background technique [0002] Since each conveying unit of each boiler in a coal-fired power plant adopts a fixed-interval ash conveying method, each conveying unit conveys at the same time in a certain period of time, and there is a peak gas consumption, while in some periods, only a few conveying units convey, and the gas consumption And very little. Therefore, the pressure of the ash removal compressed air pipe network has caused great fluctuations. In order to maintain the minimum delivery pressure of the ash removal compressed air pipe network, the air supply of the air compressor needs to maintain a large supply margin, resulting in a waste of compressed air. [0003] At present, after coal-fired power plants participate in the deep adjustment of large units ...

AI Technical Summary

Problems solved by technology

Due to the limitations of current production management and instrument technology, it is impossible to achieve precise control of feeding, resulting in the need for high-pressure and large-flow compressed air to complete the work of pneumatic ash conveying

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