Twin-stage adjustable blade spiral-flow type dilution mixer for gas drainage

Abstract

The invention relates to a twin-stage adjustable blade spiral-flow type dilution mixer for gas drainage, which comprises a tubular shell, an inlet pipe and an expansion pipe, and is characterized in that a diversion cone, an inner deflection blade, a first adjusting mechanism, an outer deflection blade, a second adjusting mechanism and a support are additionally arranged, wherein the diversion cone is arranged in the expansion pipe, and is coaxial with the shell, a straight pipe at an outlet end and the expansion pipe; the inner deflection blade is arranged in a cavity between the inner wall of the expansion pipe and the outer wall of the diversion cone, and the outer deflection blade is arranged in a cavity between the outer wall of the expansion pipe and the inner wall of the shell; in the first adjusting mechanism, one end of an inner rotating shaft is arranged outside the shell, the other end of the inner rotating shaft is attached on the outer wall of the diversion cone, the inner diversion blade is fixed on the inner rotating shaft, one end of the inner rotating shaft, which is arranged outside the shell, is connected with an outer transmission shaft arranged on the support through a bevel gear group, and an outer gear engaged with an outer gear ring is fixed on the outer transmission shaft; and the second adjusting mechanism and the first adjusting mechanism have the same structure. The twin-stage adjustable blade spiral-flow type dilution mixer for gas drainage, provided by the invention, has the advantages of security protection, low energy consumption during gas drainage conveying 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 with adjustable vane swirling dilution mixer for gas extraction and exhaust gas or air, which belongs to ultra-low concentration methane Technical fields of thermal countercurrent oxidation and low-density energy recovery. Background technique [0002] Globally, coal mining releases about 49Mt of methane every year, accounting for about 9% of the total global methane emissions. The concentration of methane in the atmosphere is the fastest growing among all greenhouse gases. Due to its strong greenhouse effect, the emission of methane must be effectively controlled. my country extracts 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 con...

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Problems solved by technology

[0004] In the patent "Oxidation Device Gas Mixing Intake System" (CN200920025062.2), the design of the main pipe and auxiliary pipe of the gas mixer is relatively complicated, and the high-concentration gas enters the gas from a very thin auxiliary pipe within 360° Intake main pipe increases the risk of explosion due to friction between high-concentration gas and wall surface

In the patent "Mixer for Coal Mine Drainage Gas and Vacuum Gas" (CN 201010274136.3), the structure of the mixer is complicated and the conical tailpipe of the gas injection pipe with evenly distributed small holes will bring great flow resistance. Increased energy consumption for transporting gas

In addition, there is no gas dilution mixer with relatively complete structure and performance.

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