Efficient screening and impurity removing device for coal powder production

Abstract

The invention discloses an efficient screening and impurity removing device for coal powder production. The device comprises a shell, wherein a feeding cylinder is arranged at the right end of the topof the shell, and a discharging pipe is arranged at the bottom end of the feeding cylinder. According to the efficient screening and impurity removing device for coal powder production, a dischargingroller rotates to realize quantitative feeding of pulverized coal into an arc-shaped screen, a scraping brush roller drives scraping plates to scrape and brush the pulverized coal in the arc-shaped screen, the scraping brush roller reversely rotates to scrape the pulverized coal in the arc-shaped screen into a flow guide screen for screening, the pulverized coal on the flow guide screen falls into the arc-shaped screen under the action of gravity, circulating screening is realized through the scraping brush roller, screening is more thorough, coarse material particles subjected to thorough screening are gathered in the arc-shaped screen, the scraping brush roller rotates in the forward direction to scrape the coarse material particles into a flow guide plate, and the coarse material particles are discharged from a coarse material outlet through the flow guide plate, so that efficient screening and impurity removal of the pulverized coal are realized; and in addition, a fan and an electric heating wire in an air pipe are electrified to work, and then hot air is generated to quickly dry the pulverized coal on the flow guide screen and the arc-shaped screen.

Description

technical field [0001] The invention relates to the technical field of thermal power equipment, in particular to a high-efficiency screening and impurity removal device for pulverized coal production. Background technique [0002] Thermal power plants usually use pulverized coal furnaces, which are boiler equipment fueled by pulverized coal. It has the advantages of rapid and complete combustion, large capacity, high efficiency, wide adaptability to coal types, and easy control and adjustment. The combustion feature of the pulverized coal furnace is that the fuel enters the combustion chamber together with the air and burns in a suspended state. The coal is pre-processed into coal powder, and the contact surface area with the air is greatly increased, which intensifies the combustion. The temperature inside the pulverized coal furnace is also high. Therefore, except coal with poor coal quality, all kinds of coal can be effectively burned in the pulverized coal furnace, and...

AI Technical Summary

Problems solved by technology

[0003] The fineness of pulverized coal is an important economic indicator for the operation of power plants. Too much fineness will lead to insufficient combustion of pulverized coal, incomplete combustion, and large fuel loss, which will affect the efficiency of the boiler. Therefore, pulverized coal needs to be screened before use. The existing The structure of the pulverized coal screening device is rigid, the function is single, the screening effect of pulverized coal is poor, and the screening efficiency is low, which cannot meet the requirements of the power plant for the use of pulverized coal

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