Vortex type extracted gas dilution mixer for coal mine

Abstract

The invention relates to a vortex type extracted gas dilution mixer for a coal mine. The vortex type extracted gas dilution mixer comprises a casing, an inlet pipe and an expansion pipe, wherein the inlet pipe is a 90-degree elbow; the inlet end of the inlet pipe is arranged outside the casing; a straight pipe section at the inlet end vertically penetrates through the interior of the casing; and a straight-pipe section at the outlet end of the inlet pipe is horizontally arranged in the casing, is connected with the expansion pipe and faces to the outlet end of the casing. The vortex type extracted gas dilution mixer is characterized by being additionally provided with an inner helical blade, an outer helical blade, a reinforced rib and a diversion cone, wherein the diversion cone is of a conical structure and is positioned in the expansion pipe; the tip of the diversion cone is back to the outlet end of the expansion pipe; the expansion pipe, the casing and the diversion cone are fixedly connected by using the reinforced ribs; the axial line of the inlet pipe, which is close to the straight pipe section at the outlet end, the expansion pipe and the diversion cone is positioned in the axis of the casing; the inner helical blade is arranged in the straight pipe section of the inlet pipe, which is close to the outlet end; and the outer helical blade is arranged in an annular cavity enclosed by the outer wall of the inlet pipe, which is close to the straight pipe section at the outlet end and the inner wall of the casing. The invention has the advantages of safe protection, low conveying energy consumption of the extracted gas, 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 for extracting gas, exhaust gas or air spiral blade swirl type dilution mixer, which belongs to the ultra-low concentration methane thermal Countercurrent oxidation and low-density energy recovery technology. 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 concentration of ...

AI Technical Summary

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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