Nozzle

Abstract

A nozzle comprises a nozzle body. A water jacket and a water conveying pipe communicated with the water jacket are arranged in the nozzle body. Cooling water enters the water jacket through the water conveying pipe to cool the nozzle body, and a plurality of water spraying holes are formed in the rear end of the water conveying pipe. A water source and a water pump continuously convey cooling water into the water conveying pipe, and the cooling water flows to the water jacket and then is drained out. The cooling water in the water jacket cools the nozzle body, and the influence on the stability and the continuous production of a gasifier due to the fact that the nozzle is too hot or even burnt is avoided. The cooling water sprayed out from the water spraying holes of the water conveying pipe and a gasifying agent in an inner cavity of the nozzle are internally mixed and then are sprayed out from an outlet to reach a gasification reaction working face, and the effect of improving the coal bed combustion condition and coal gas quality is achieved.

Description

technical field [0001] The invention relates to the field of energy mining, in particular to a nozzle used in an underground coal gasification technology. Background technique [0002] Underground coal gasification technology integrates the three major processes of well construction, coal mining and surface gasification. It directly burns underground coal in a controlled manner to obtain combustible gas. Underground coal gasification technology transforms traditional coal mining into chemical coal mining, eliminating the need for huge coal mining, transportation, washing, gasification and other processes and equipment, and has the advantages of good safety, low investment, high efficiency, and less pollution. advantage. [0003] Underground coal gasification takes place in underground gasifiers. And in the practical application of underground coal gasification technology, it has a wide range of applications and an important role as a nozzle for injecting gasification agent...

AI Technical Summary

Problems solved by technology

[0004] However, because the position of the nozzle is close to the coal seam combustion zone, it is easily affected by high temperature

Although there is a temperature measuring device, it lacks effective protection for the nozzle, which can easily cause the nozzle to be burned, which will affect the stability and continuous production of the underground gasifier

Moreover, there will be a certain degree of water shortage during the coal combustion process of the underground gasifier, and the water injected from the wellhead of the drilling well cannot effectively reach the gasification reaction working face of the coal seam, resulting in certain restrictions on the quality of the gas

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