Safe energy-saving pneumatic ash removal system

Abstract

The invention relates to a safe energy-saving pneumatic ash removal system for a coal fired power plant. At present, a positive pressure concentrated phase pneumatic ash removal system which is still commonly used in the coal fired power plant is a system which can be used for discontinuously transmitting and conveying powder by using a cabin pump as a secondary storage container; however, the cabin pump, a feeding valve and a discharging valve are eliminated, and an electric baffle plate door, a flow monitoring type check valve device and a hybrid tube are used in the safe energy-saving concentrated phase pneumatic ash removal system instead of the cabin pump, the feeding valve and the discharging valve to change a discontinuous ash conveying system into a continuous concentrated phase pneumatic ash removal system, so that the problem that the safe operation of an electric dust remover is influenced because insufficient conveying capacity can occur in a discontinuous ash removal system is solved. By the safe energy-saving pneumatic ash removal system, the ash conveying capacity of the system can be improved, the flow state and the ash-to-air ratio of conveyed ash can be monitored, the cabin pump and accessories and equipment which are related to the feeding valve, the discharging valve and the like of the cabin pump are eliminated, and the quantity of ash conveying pipelines can be reduced.

Description

technical field [0001] The invention relates to a safe and energy-saving pneumatic ash removal system for fly ash in a coal-fired power plant. technical background [0002] The fly ash produced by coal-fired power plants can be comprehensively utilized, and the fly ash needs to be transported to the ash storage for backup. Due to the large amount of conveying and the long distance, a large conveying pressure is required to complete the conveying task. The positive pressure dense phase pneumatic ash removal system of large coal-fired power plants generally adopts imported technology. Combined with the reality of our country, the quality of coal used in coal-fired power plants is changeable, and the large increase in ash content requires a large conveying output. The positive pressure dense phase pneumatic ash conveying system is difficult to adapt to, and the phenomenon of conveying blockage and ash storage in electrostatic precipitators often occur The backlog of fly ash i...

AI Technical Summary

Problems solved by technology

Combined with the reality of our country, the quality of coal used in coal-fired power plants is changeable, and the large increase in ash content requires a large conveying output. The positive pressure dense phase pneumatic ash conveying system is difficult to adapt to, and the phenomenon of conveying blockage and ash storage in electrostatic precipitators often occur The backlog of fly ash in the hopper makes the powder level reach a dangerously high material level, which seriously threatens the safe operation of the power plant. The ash is forced to be released from the ash storage hopper under the electrostatic precipitator urgently on the spot and causes serious pollution. These phenomena have developed to the point where it must be resolved

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