Double-type air-distribution plate and single pipe discharging sending tank

Abstract

The invention discloses a double-type air-distribution plate and single pipe discharging sending tank. The sending tank comprises a tank body with a cylindrical upper half part and a conic lower half part and is characterized in that: the conic lower half part is provided with a main fluidifying air chamber and an auxiliary fluidifying air chamber; the auxiliary fluidifying air chamber is sleeved outside the main fluidifying air chamber; and a main fluidifying air distribution plate and an auxiliary fluidifying air distribution plate are arranged in the main fluidifying air chamber upwards sequentially. The double-type air-distribution plate and single pipe discharging sending tank improves the utilization rate of inner spaces of the conventional sending tank and effectively prevents internal pulverized coal from bridging. Two different forms of air-distribution plates, namely umbrella hoods are used to control the sizes of fluidifying areas, so that the delivery with higher solid / gas ratio can be realized. The adjustment in a lager solid / gas ratio range can be realized by adjusting two flows of fluidifying air, pressurizing air and supplementing air.

Description

technical field [0001] The invention relates to the technology of an entrained bed gasifier with dry coal powder feed, in particular to a double-type air distribution plate and a single-pipe upper discharge delivery tank. Background technique [0002] The dry coal powder feed entrained flow gasifier is the main direction of gasifier research and development at present, and the dry coal powder pressurized dense phase pneumatic conveying technology is the most critical in the dry coal powder feed pressurized entrained flow gasification technology One of the techniques. [0003] At present, the coal supply system of the mainstream dry pulverized coal pressurized gasification device (Shell, GSP and other brands) adopts the lock bucket technology, that is, the pulverized coal is transported from the atmospheric pressure powder bin to the high pressure bin through the multi-stage variable pressure bin, and then passed through the closed The phase conveying system is transported t...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the above problems and provide a double-type air distribution plate and a single-pipe upper discharge sending tank. Two different types of air distribution plates at the bottom are used to realize the stable fluidization of coal powder, which can effectively solve an air distribution problem. The problem of low space utilization and bridging of the board can also solve the instability and discontinuity of pulverized coal transportation caused by fluidization instability or complexity of control, and can also increase the solid-gas ratio to 200 ~800kg / m 3

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