Dust control method and device of power plant coal transport system

Abstract

The invention discloses a dust control method of a power plant coal transport system for reducing the concentration of dust generated by the coal transport system. The coal transport system comprises guide chute and a coal transport belt, wherein one end of the coal transport belt is located in the guide chute. The method comprises the following steps: reducing the positive pressure of an air flow in the guide chute; and intermittently spraying a non-working surface of the coal transport belt outside the guide chute and non-sealed places of rollers at two ends, wherein the guide chute is of a sealed structure. Based on the fully-sealed guide chute, various dust removal manners such as unpowered, micro-powered and high pressure water spray dust removal manners are organically integrated in a process system, so that the system can be suitable for dust removal requirements of coal types with small granularity of fire coal and high cohesiveness in different humidity conditions, and has the advantages of good dust removal effect, low energy consumption, small maintenance quantity and the like. After implementing the project, the site dust concentration of the coal transport system is reduced to be less than 4mg/m3 which satisfies the requirement on the work site dust concentration of the state.

Description

technical field [0001] The invention relates to a coal conveying system of a power plant, in particular to a method and device for controlling dust in the coal conveying system of a power plant. Background technique [0002] The traditional coal conveying system of a thermal power plant basically has no effective dust prevention and suppression measures in design. A large amount of dust will be generated during the unloading, transfer and screening process of coal burning, which is difficult to control and is the most serious dust pollution in power plants. place. Dust pollution not only endangers the health of workers, but also creates potential safety hazards of spontaneous combustion of pulverized coal, which seriously affects the safe and civilized production of power plants. As the leading industry in the development of the national economy, the electric power industry must take the road of sustainable development. In addition, in recent years, the national environment...

AI Technical Summary

Problems solved by technology

[0002] The traditional coal conveying system of a thermal power plant basically has no effective dust prevention and suppression measures in design. A large amount of dust will be generated during the unloading, transfer and screening of coal, which is difficult to control and is the most serious dust pollution in power plants. place

Dust pollution not only endangers the health of workers, but also creates potential safety hazards of spontaneous combustion of pulverized coal, seriously affecting the safe and civilized production of power plants

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