Low-concentration coal bed gas or gas combustor and matched system thereof

Abstract

The invention discloses a low-concentration coal bed gas or gas combustor and a matched system thereof. The low-concentration coal bed gas or gas combustor comprises a metal housing, wherein the edge of the top end of the metal housing is connected with a boiler through a connection flange; a ceramic fiber layer is attached to the inner wall of the metal housing; a fireproof brick layer is attached to the inner side of the ceramic fiber layer; a porous medium layer upper part, a porous medium layer lower part, a ceramic honeycomb panel, a heat-resistant metal wire mesh and an uniform-pressure air chamber are sequentially arranged at the interior of the fireproof brick layer from top to bottom; the four sides of the heat-resistant metal wire mesh are fixed on the metal housing and are used for supporting the porous medium layer upper part, the porous medium layer lower part and the ceramic honeycomb panel; the uniform-pressure air chamber is formed between the heat-resistant metal wire mesh and the bottom of the metal housing; a coal bed gas or gas inlet is formed in the bottom of the metal housing at the center of the uniform-pressure air chamber; a baffle plate is arranged at the coal bed gas or gas inlet. The low-concentration coal bed gas or gas combustor has the beneficial effect that the combustor can be used for combusting the low-concentration coal bed gas or gas.

Description

technical field [0001] The invention belongs to the technical field of gas combustion, and relates to a low-concentration coalbed methane or gas burner and its matching system. Background technique [0002] my country is rich in coalbed methane (gas) resources, and the reserves within 2000m below the surface are about 35 trillion m 3 . But my country's coalbed methane (gas) utilization rate is very low. According to statistics, in 2013 my country's coalbed methane (gas) extraction volume was 15.6 billion cubic meters, of which 6.6 billion cubic meters were utilized, and the utilization rate was only 42.3%. The main reasons are: (1) The concentration of coalbed methane (gas) is low. More than 50% of the extracted coalbed methane (gas) in my country has a concentration below 10%, and most of them have a concentration below 5%. ; (2) Coalbed methane (gas) parameters fluctuate greatly. During the coalbed methane (gas) extraction process, the concentration can reach 80% when ...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a low-concentration coalbed methane or gas burner, which solves the problem that the existing porous media burner does not consider the large change in fuel concentration and is not suitable for burning low-concentration coalbed methane or gas

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