A secondary fiber separation device for pulverized coal system

Abstract

The invention discloses a pulverized coal system fiber secondary separation device. The device comprises a fiber screen shell body, a brush, a screen, a base and a back flushing nitrogen pipeline; a motor is installed at the central position of the fiber screen shell body; a cover is installed below the motor; a bearing is installed below the cover; a rotary shaft is connected with the bottom of the bearing; a reduction box is connected with the outer side of the rotary shaft; fixed blocks are installed on both sides of the reduction box; a fixed rod is installed in each of the fixed blocks; and limiting blocks are installed on both the left side and the right side of each fixed rod. With the pulverized coal system fiber secondary separation device, separation treatment can be convenientlyconducted to pulverized coal by a user, the secondary separation structure is simple and manufacturing is easy. The device is applicable to a pulverized coal gasification device, placing stability ofthe device is effectively improved, the screen is convenient to disassemble, inspect and clean, the effect of capturing fiber and other impurities is remarkable, deficiency of existing technology canbe offset, a pulverized coal system can be cleaned more thoroughly and more efficiently, and a good foundation is laid for stable operation of the device.

Description

technical field [0001] The invention mainly relates to the fields of coal chemical industry and power generation production equipment, and in particular to a secondary fiber separation device for a pulverized coal system. Background technique [0002] According to the requirements of coal chemical industry and power generation process, the coal grinding and drying unit of aerospace furnace system is equipped with ash conveying system for continuous pulverized coal conveying. The ash conveying system includes three important equipments: rotary unloading valve, fiber screen and screw conveyor. Raw coal is often accompanied by incompletely mineralized woody materials or other sundries generated during transportation and storage. During the coal grinding process, woody materials and other sundries will form long fibers and be mixed in coal powder, and the coal powder mixed with fibers will not Adding filtration to use directly may affect the stability of the pressurized pulveriz...

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Problems solved by technology

[0002] According to the requirements of coal chemical industry and power generation process, the coal grinding and drying unit of aerospace furnace system is equipped with ash conveying system for continuous pulverized coal conveying. The ash conveying system includes three important equipments: rotary unloading valve, fiber screen and screw conveyor. Raw coal is often accompanied by incompletely mineralized woody materials or other sundries generated during transportation and storage. During the coal grinding process, woody materials and other sundries will form long fibers and be mixed in coal powder, and the coal powder mixed with fibers will not Adding filtration to use directly may affect the stability of the pressurized pulverized coal transportation process and affect the safe operation of the device. In the prior art, the fiber screen adopts a rotary screen mesh primary filtration structure during the pulverized coal transportation process, which can generally effectively screen out fibers. However, there is a centripetal force on the rotating screen surface of the fiber screen during the rotation process, and there is a certain gap between the rotating screen surface and the shell; it is easy to cause fibers or other debris, especially the ceramic pieces falling off the system pipe wall, etc. Complete capture cannot completely solve the problem that debris enters the pulverized coal pressurization system and affects the safe and stable operation of the device

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