Rotary feeding pulverized coal quantitative feeding and conveying device and method

Abstract

The invention discloses a rotary feeding pulverized coal quantitative feeding and conveying device and a method. The feeding device consists of a locking hopper system, a pulverized coal looser, a pressing feeder, a pulverized coal flow meter and related control valves; the locking hopper system realizes feeding of pulverized coals from normal pressure to increased pressure; the lower part of a feeding hopper is connected with the pulverized coal looser for preventing bridge blockage of the pulverized coals; the lower part of the pulverized coal looser is connected with the pressing feeder; the continuous and stable feeding of the pulverized coals is realized through a mechanical rotary feeding mode; the lower part of the pressing feeder is connected with a pneumatic conveying device; and materials are continuously fed into reaction equipment through a pneumatic conveying mode. The feeding device realizes pressed, continuous and quantitative feeding of the pulverized coals through matching the locking hopper feeding system with the pressing feeding system and the pneumatic conveying system, guarantees the stability of the feeding system, and is convenient for operation, simple in control, accurate in metering and capable of being widely applied to feeding of the pulverized coals with different particle sizes and other solid materials.

Description

technical field [0001] The invention relates to the feeding and conveying of solid powder in the field of energy and chemical industry, in particular to a rotary feeding type pulverized coal quantitative feeding conveying device and method. Background technique [0002] Pressurized feeding and transportation of pulverized coal is the source of raw material supply for dry coal gasification and pulverized coal pyrolysis, and it is one of the key technologies that affect the continuous and stable operation of the subsequent reaction process. At present, there are mainly two technical solutions for the pressurized feeding and transportation of pulverized coal: one is the pressurized dense-phase gas delivery technology using gas as the carrier gas, which mainly includes the lower discharge dense-phase delivery system, such as Shell and Prenflo way, and the upper discharge dense phase conveying system, such as GSP way. The second is the fledgling solids pumping technology. [00...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the defects of low precision and unstable transportation in the transportation of solid materials such as pulverized coal in the prior art, and provide a kind of feeding rate that can be better controlled, accurate metering, simple control, and can continuously and stably feed materials under pressure. Rotary feeding type pulverized coal quantitative feeding conveying device and method

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