Rational positive-pressure pneumatic pressure ash handling system

Abstract

The invention relates to a rational positive-pressure pneumatic pressure ash handling system in a coal fired power plant. A positive-pressure concentrated-phase pneumatic pressure ash handling systems commonly adopted by the coal fired power plant currently implement discontinuous powder transmitting and conveying by taking a bilge pump as a secondary storage container; while a concentrated rational positive-pressure pneumatic pressure ash handling system uses an electronic baffle door, a solid powder flow monitor, and a mixed pipe to replace the bilge pump, a charge valve, and a discharge valve, and change discontinuous ash conveying into rational positive-pressure pneumatic pressure ash handling system so as to overcome the defect that a discontinuous ash handling system can possibly threaten the safety running of an electric dust catcher due to insufficient conveying power. The rational positive-pressure pneumatic pressure ash handling system not only can improve the ash conveying capacity of the system, but also can monitor the flow state and ash / air ratio of the conveyed ash; moreover, relevant accessories and devices such as the bilge pump, the charge valve, and the discharge valve, and the like can be saved, and the quantity of ash conveying pipelines is reduced.

Description

technical field [0001] The invention relates to a quantitative positive pressure 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 accumulation...

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. It is difficult to adapt to the positive pressure dense phase pneumatic ash conveying system, and frequent occurrence of conveying blockage and electrostatic precipitator ash storage The accumulation of fly ash in the hopper makes the powder level reach a dangerously high 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 on the spot, causing serious pollution or reducing the load of the generator set. Safe operation at the expense of the economy has grown to the point where it must be addressed

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