Underground gasification gas injection device and method

Abstract

The invention provides an underground gasification gas injection device and method. The device comprises a gas injection pipe (3) and an atomizing nozzle (21); the gas injection pipe (3) is provided with an outer pipe (25) and an inner pipe (24); the inner pipe (24) isolated from the outer pipe (25) is disposed in the outer pipe (25); the atomizing nozzle (21) is disposed at one end of the gas injection pipe (3) and provided with an inner spout and an outer spout; the inner spout is communicated with the inner pipe (24) and the outer spout is communicated with the outer pipe (25). The underground gasification gas injection device and method is provided in order to at least reduce heat loss in the gas delivery process.

Description

technical field [0001] The invention relates to the field of underground coal gasification, and more specifically relates to an underground gasification gas injection device. Background technique [0002] For example, underground gasification of carbon-containing organic matter such as coal and oil shale is the use of gasification agents to control the combustion of carbon-containing organic matter such as coal and oil shale in the underground, and generate combustible organic matter through thermal and chemical effects on carbon-containing organic matter. gas process. The combustible gas produced can be used as power generation gas or chemical synthesis gas. In the process of producing combustible gas by underground gasification of carbon-containing organic matter, the type of gasification agent and gas injection method largely determine the quality of combustible gas and the stability of gas production. In practical applications, the types of carbon-containing organic un...

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Problems solved by technology

However, in the implementation, the efficiency of water vapor transportation in the gasification agent is not high. Most of the water vapor is transported and cooled in the well for a long distance to produce condensed water. When it reaches the reaction zone, the water or water vapor cannot mix well with the oxygen / oxygen-enriched oxidizing agent. Evenly sent to the reaction working face, which affects the efficiency of underground coal gasification and stable production process control

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