Powder coal pressure transmission system and method of fuel coal gasification entrained-flow bed

Abstract

The invention relates to a powder coal pressure transmission system and method of a fuel coal gasification entrained-flow bed, belonging to a powder coal pressure transmission system and method. A powder coal storage bin of the system is connected with a feed port of a powder coal isolation lock hopper through a hydraulic double-plunger dry powder pump; a discharge port of the powder coal isolation lock hopper is connected with a feed port of a powder coal feed hopper; an output port of a high-pressure plunger pump is connected with a pressurization port of the powder coal isolation lock hopper; and all the components are respectively connected through pipeline transition. The method comprises the following steps: pressurizing powder coal in the powder coal storage bin into the powder coal isolation lock hopper through the hydraulic double-plunger dry powder pump; after the powder coal isolation lock hopper is fully filled with the powder coal, isolating the powder coal isolation lock hopper from the hydraulic double-plunger dry powder pump; and applying pressure into the powder coal isolation lock hopper until the powder coal enters the powder coal feed hopper under the action of gravity. The method does not need high-pressure inert gas in the pressurization process, is efficient and energy-saving in the compression process, enhances the facility operation economy, avoids the probability of high / low-pressure bin shift and other safety accidents caused by the damage of the piston or discharge valve, and saves the operating cost.

Description

technical field [0001] The invention relates to a pulverized coal pressurized conveying system and method, in particular to a pulverized coal pressurized conveying system and method for coal-fired gasification entrained flow bed. Background technique [0002] The process of coal-fired gasification is to convert the difficult-to-process solid raw coal into easy-to-purify and applicable synthesis gas (CO+H 2 ) or fuel gas process. In the entrained bed gasification process, pulverized coal with a content of 5-97um accounting for more than 80% needs to be sprayed into the gasifier together with the gasification agent. [0003] In the prior art, the coal supply system of pulverized coal pressurized gasification devices (space furnace, shell and GSP, etc.) for domestic coal-fired gasification usually adopts the mode of intermittent pressurized dense-phase pneumatic conveying. The specific process is: the pulverized coal is stored in the pulverized coal storage bin. When the pulv...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a pulverized coal pressurized conveying system and method for coal-fired gasification entrained flow bed, which solves the problem of low gas compression efficiency, high energy consumption and a large amount of high-pressure gas in the lock bucket under the condition of high-pressure gas replacement. The problem of pollution and energy waste caused by emptying the bucket after the discharge is completed

Images