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Nozzle

A technology of nozzles and water spray holes, which is used in coal gasification, underground mining, construction, etc., can solve the problems of gas quality limitation, easy to be affected by high temperature, nozzle burnout, etc.

Active Publication Date: 2015-05-20
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0029] see figure 1 The first embodiment of the nozzle of the present invention includes a nozzle main body 1, a water jacket 3 and a water delivery pipe 4 communicating with the water jacket 3 are arranged in the nozzle main body 1, and cooling water enters the water jacket 3 through the water delivery pipe 4 to The nozzle main body 1 is cooled, and the rear end of the water delivery pipe 4 is provided with several water spray holes 431 .

no. 2 example

[0031] see figure 2 , The second embodiment of the nozzle of the present invention includes a nozzle body 1 , a nozzle cavity 2 , a water jacket 3 and a water delivery pipe 4 . The nozzle main body 1 is approximately tubular and encloses a nozzle cavity 2 . The inner cavity 2 of the nozzle is the conveying channel of the gasification agent. The water jacket 3 is arranged on the inner wall of the rear end of the nozzle body 1 (towards the coal seam combustion zone), and the water pipe 4 is arranged on the inner side of the nozzle body 1 away from the end of the coal seam combustion zone, and communicates with the water jacket 3 . When the nozzle is in use, cooling water enters the water jacket 3 through the water delivery pipe 4 to cool the nozzle main body 1 .

[0032] The length and outer diameter of the nozzle body 1 are determined according to the inner diameter of the underground gasifier well and the process requirements. In this embodiment, the length of the nozzle bo...

no. 3 example

[0049] see Figure 7 , The third embodiment of the nozzle of the present invention includes a nozzle body 1 , a nozzle cavity 2 , a water jacket 3 and a water delivery pipe 4 . The inner cavity 2 of the nozzle is the conveying channel of the gasification agent. The water jacket 3 is arranged on the inner wall of the rear end of the nozzle body 1 (towards the coal seam combustion zone), and the water pipe 4 is arranged on the inner side of the nozzle body 1 away from the end of the coal seam combustion zone, and communicates with the water jacket 3 . When the nozzle is in use, cooling water enters the water jacket 3 through the water delivery pipe 4 to cool the nozzle main body 1 . The rear end of the water pipe 4 is extended to form an extension section 43 , and the extension section 43 is provided with a plurality of water spray holes 431 . The cooling water sprayed from the spray hole 431 is internally mixed with the gasification agent in the nozzle inner cavity 2 and then...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/295
CPCE21B43/295
Inventor 姚凯李金刚刘清宇宋建权
Owner ENN SCI & TECH DEV
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