Horizontal gas gasifier and gasification method thereof

Abstract

The invention discloses a horizontal coal gas gasifier and a gasification method thereof, and relates to the field of clean coal gasification. According to the horizontal gas gasifier and the gasification method thereof, the horizontal gasifier comprises a gasification reaction chamber, a gas-slag separation section and a slag pool which are sequentially arranged from top to bottom, burner channels are symmetrically arranged on the two sides of the gasification reaction chamber, pulverized coal is introduced into the burner channels for incomplete combustion, and high-temperature coal gas and slag generated by gasification reaction enter the gas-slag separation section from a slag discharging opening; a membrane type water cooling wall is vertically arranged in the middle of the gas-slag separation section, low-temperature coal gas enters the gas-slag separation section from a chilling ring arranged on the upper portion of the membrane type water cooling wall, the temperature of the high-temperature coal gas is reduced to be below the ash melting point of slag, the slag is solidified into solid slag, the coal gas and the solid slag are subjected to gas-slag separation at the bottom, the slag falls into the slag pool, coal gas enters a subsequent system from the coal gas outlet in the upper portion, the horizontally-arranged gasification reaction chamber and the membrane type water cooling wall are adopted to play a baffling role, and then the overall height of the gasifier is greatly reduced.

Description

technical field [0001] The invention relates to the field of clean coal gasification, in particular to a horizontal coal gas gasification furnace and a gasification method thereof. Background technique [0002] Coal gasifier is a common equipment used to produce gas from coal as raw material for gas or chemical synthesis gas. It can be mainly divided into three categories: fixed bed, fluidized bed and entrained bed. Entrained bed gasification is to send the gasification agent (oxygen and water vapor) with coal powder or coal slurry into the gasifier through special nozzles. Under the high-temperature radiation, the oxygen-coal mixture instantly ignites and burns rapidly, generating a large amount of heat. The temperature in the center of the flame can be as high as 2000°C, all dry distillation products are rapidly decomposed, and coal char is gasified at the same time to generate gas and slag (liquid slag) containing carbon monoxide and hydrogen. [0003] Among the three ...

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Problems solved by technology

[0007] Aiming at the fact that the entrained flow beds in the prior art are basically large or medium-sized gasifiers, which cannot meet the needs of users of coal gasification technology with small gas production capacity, the present invention proposes a horizontal coal gasification furnace and its gasification method. The gasification furnace includes a gasification reaction chamber, a gas-slag separation section and a slag pool arranged in sequence from top to bottom. The horizontal gasification reaction chamber can effectively reduce the height of the equipment. Compared with the vertical gasification The chemical reaction chamber can greatly reduce the height of the overall steel structure and reduce costs

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