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Mixer of coal mine extracted gas and ventilation gas

A technology for extracting gas and wind gas, which is applied in the fields of ultra-low concentration methane thermal countercurrent oxidation and low-density energy recovery, and achieves the effects of good mixing uniformity, reduced pressure head and energy consumption

Inactive Publication Date: 2011-01-05
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the processing capacity of each coal mine exhaust air oxidation device is generally tens of thousands of cubic meters per hour, there is currently no dedicated mixer for gas extraction and exhaust air

Method used

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  • Mixer of coal mine extracted gas and ventilation gas
  • Mixer of coal mine extracted gas and ventilation gas
  • Mixer of coal mine extracted gas and ventilation gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] exist Figure 1~3 In the shown embodiment: the two ends of the casing 1 are provided with flanges 10, and the gas injection pipe is formed by successively connecting the inlet flange 8, the inlet pipe 7, the expansion pipe 6, the transition pipe 5 and the conical tail pipe 3, Wherein the inlet pipe 7 is bent to 90°, the inlet end is arranged outside the housing 1, the front end straight pipe section of the inlet pipe 7 penetrates the housing 1, and the rest are arranged in the housing 1 and towards the outlet of the housing 1; the inlet pipe 7 The axes of the end straight pipe section, the expansion pipe 6, the transition pipe 5 and the conical tailpipe 3 are located at the center of the housing 1, and the length of the end straight pipe section of the inlet pipe 7 is not less than 10 times the diameter of the inlet pipe 7; the conical tailpipe 3 There are small holes 9 evenly distributed on the wall, and the end adopts a circular arc transition, and the cone angle is 4...

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Abstract

The invention relates to a mixer of coal mine extracted gas and ventilation gas, which is characterized by comprising a tubular shell, a gas ejection tube and a fairing, wherein two flanges arranged at both ends of the shell, the gas ejection tube is formed by sequentially connecting an inlet flange, an inlet tube, an expansion tube, a transition tube and a conical tail tube, the inlet end of the inlet flange is arranged outside the shell, the inlet tube, the expansion tube, the transition tube and the conical tail tube are arranged in the shell facing the outlet of the shell, the end of the conical tail tube adopts arc transition, small holes are uniformly distributed on the wall surface of the conical tail tube, a plurality of stiffeners are arranged between the transition tube and the shell, the fairing is arranged in the shell behind the stiffeners and encircles the conical tail tube, and the end of the fairing is near the outlet of the shell. The invention has the advantages of uniformly mixing, low energy consumption on extracted gas transportation and the like.

Description

technical field [0001] The present invention relates to the gas supply equipment of the coal mine exhaust gas oxidation device, in particular to a coal mine exhaust gas oxidation device gas drainage and exhaust gas mixer, which belongs to ultra-low concentration methane thermal countercurrent oxidation and low density energy recovery technology field. Background technique [0002] In recent years, my country has extracted more than 5 billion cubic meters of gas every year. Among them, only 1 / 4 to 1 / 3 of the drainage gas is used, and the rest are in the state of emptying. In particular, low-concentration drainage gas with a concentration of less than 6% cannot be used for civil or power generation, and can only be evacuated. This not only pollutes the atmospheric environment, but also causes waste of non-renewable resources. If the extracted gas is mixed with the exhaust gas in the coal mine and sent to the oxidation device of the exhaust gas in the coal mine for oxidation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
Inventor 刘永启刘瑞祥李宗立王延遐高振强郑斌
Owner SHANDONG UNIV OF TECH
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