A material conveying system and method

Abstract

The invention relates to the technical field of coal gasification, in particular to a material conveying system and method. It can realize the transportation of solid materials and the efficient shunting of solid materials and gas products without using mechanical valves, and improve the heat recovery efficiency of gas products. The material conveying system includes a gasifier; a gas product heat recovery system connected to the gas product outlet of the gasifier; a solid material recovery treatment system connected to the solid material outlet at the bottom of the gasifier through a bent conveying pipe, bent The angle between the curved conveying pipe and the vertical direction is an acute angle, and the solid material can fall to the bent conveying pipe under the action of gravity to form a material seal; the pneumatic conveying pipe is used to blow air to the solid material forming the seal, so that the solid material Overcome the resistance of the curved conveying pipeline, and be conveyed to the solid material recovery and treatment system under the action of pressure difference.

Description

technical field [0001] The invention relates to the technical field of coal gasification, in particular to a material conveying system and method. Background technique [0002] A large amount of high-temperature and high-pressure solid materials and high-temperature gas products are usually produced in the process of coal pyrolysis and gasification. Among them, the high-temperature and high-pressure solid materials usually need to be discharged from the system for recycling after cooling and depressurization. In order to improve thermal efficiency, high-temperature gas products need to be Perform heat recovery. [0003] In order to achieve high-efficiency heat recovery, it is necessary to separate the high-temperature gas product and the high-temperature and high-pressure solid material. The high-temperature gas product after the split is usually recovered by using a waste heat boiler to obtain high-quality steam for power generation, etc.; and the high-temperature and high-...

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Problems solved by technology

[0004] In the prior art, when discharging high-temperature and high-pressure solid materials, mechanical valves are usually used to control the transportation of high-temperature and high-pressure solid materials, and the opening and closing of the mechanical valves are used to control the material level height to realize the separation of high-temperature and high-pressure solid materials and high-temperature gas products. Shunting, under high temperature and high pressure conditions, frequent operation of mechanical valves is prone to problems such as poor sealing, making it difficult to effectively control the splitting of high-temperature and high-pressure solid materials and high-temperature gas products, which in turn will affect the heat recovery efficiency of gas products

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