Recycling method of fine slag discharged by anthracite coal water slurry gasifier and structure thereof

Abstract

The invention discloses a recycling method of a fine slag discharged by an anthracite coal water slurry gasifier and a structure thereof. The method comprises the following steps: respectively connecting gasified fine slag discharged by the anthracite coal water slurry gasifier and a flotation feeding barrel and a tail slime charging barrel through pumps; carrying out blending combustion of the gasifier by using clean coal entering the flotation feeding barrel obtained in a flotation manner; squeezing the material entering the tail slime charging barrel as coal slime to carry out blending combustion of a coal burning boiler; and pumping the wastewater after flotation and squeezing back to a lye storage tank to recycle. By adopting the recycling method, the gasification efficiency of the coal water slurry is improved, the energy consumption is reduced, high load and safe and stable operation of a coal chemical production line are ensured, and an exemplary role is played for development of an anthracite coal water slurry gasification technology in the field of the coal chemical industry in Guizhou even in China.

Description

technical field [0001] The invention relates to a method for reusing fine slag discharged from an anthracite coal-water slurry gasification furnace and its structure, and belongs to the technical field of technology and transformation of the ash water system of the gasification furnace. Background technique [0002] Coal chemical industry used to use bituminous coal as raw material in the past, and the amount of ash produced was small and the residual carbon content was low, so it was of little significance to use. The existing treatment method is to process it to outsourced units for the manufacture of cement and its concrete mortar preparation. However, due to the constraints of bituminous coal production and production areas, anthracite coal-water slurry gasification has also been forced to start promotion. Guizhou is rich in anthracite coal production, but due to the high melting point of coal ash, high ash content, and poor slurryability, the operation efficiency of an...

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Problems solved by technology

Guizhou is rich in anthracite coal production, but due to the high melting point of coal ash, high ash content, poor slurryability and other reasons, the operation efficiency of anthracite coal-water slurry gasification technology is low and the production cost is high

Analyzing the reason, it is affected by coal quality, the residual carbon content in the ash of anthracite is relatively high. In the past, the gasification fine slag was treated and discharged or sold directly to outside units in the gasification system. One of the causes of low performance

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