Flow monitoring type non-return flap apparatus

Abstract

The invention relates to a transportation technology of the pulverized fuel ash of coal-fired power plants. The pulverized fuel ash from the coal-fired power plant needs to be transported to an ash storage for later use. According to the existing transportation technology, the coal-fired power plant usually adopts the positive pressure dense phase pneumatic ash transportation system. However, facts have proven that the positive pressure transportation system has some defects, the ash content of the coal used by the coal-fired power plant coal-fired power plant increases greatly, which leads the pulverized fuel ash transportation system to be inadaptable, so the pipe is often blocked or an ask bucket has to been discharged immediately when too much ash is blocked in the ash bucket of the electrostatic precipitator, and the environment is seriously polluted. The invention adopts a flow-monitoring non-return device, which changes the intermittent transportation into continuous transportation, solves the emergent ash discharge problem of the positive pressure dense phase pneumatic ash transportation system; the technology also has the air lock and flow-monitoring functions.

Description

Technical field [0001] The invention relates to a conveying technology of fly ash from coal-fired power plants. Background technique [0002] The fly ash produced by coal-fired power plants can be used comprehensively, and the fly ash needs to be transported to the ash storage for standby. Due to the large delivery volume and the long distance, a greater delivery pressure is required to complete. According to the existing fly ash transportation technology, most large coal-fired power plants adopt a positive pressure dense phase pneumatic ash transportation system. At present, the types of coal used in coal-fired power plants are changeable, and the ash content has greatly increased. The positive pressure dense phase pneumatic ash conveying system is far from adaptable. Especially in winter, the temperature of fly ash decreases due to the heat dissipation of the warehouse pump, the viscosity of fly ash is large, and the fluidity is poor. The phenomenon of conveying blockage often ...

AI Technical Summary

Problems solved by technology

At present, the types of coal used in coal-fired power plants are changeable, and the ash content has increased significantly. The positive pressure dense phase pneumatic ash conveying system is far from being able to adapt

Especially in winter, due to the heat dissipation of the warehouse pump, the temperature of the fly ash is lowered, the viscosity of the fly ash is high, and the fluidity is poor. Conveying blockages often occur and the accumulation of fly ash in the dust storage hopper of the electrostatic precipitator makes the powder level reach a high level. Often forced to release ash from the ash storage hopper under the electrostatic precipitator on the spot, threatening the safe operation of the power plant and seriously polluting the environment. These phenomena have developed to the point where they must be resolved

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