Speaking of gas generating units have to mention the matter of gas collection, what kind of technology and machinery is used for gas collection and application? First of all, gas collection: gas collection through gas extraction, gas extraction commonly uses water ring vacuum pump, for example, the coal mine I work with is 2BEC52 and 2BEC72 water ring vacuum pump. Pumping device in the air drainage pumping station (of course, there are also underground movable pumping stations, but ordinary pumping can be small), pumps and drainage main pipeline connection, drainage main pipeline continues to extend through the wellbore to underground and drainage branch pipe connection, branch pipe and drilling hole connection. There may be thousands or tens of thousands of boreholes in a coal mine. Gas comes from these boreholes and gathers at gas pumping stations through drainage pipelines. The following is the application of gas: high-concentration gas can be applied (more than 30% of the general concentration is called high-concentration gas), the general application way is gas power generation, gas extraction application in this regard, as far as I know, the best is the Jincheng Coal Group. Low concentration gas is usually discharged directly into the atmosphere (gas is greenhouse gas!!!) because of its difficult application or high cost.
Coalbed methane is called coal mine gas in coal mine. According to the new resource evaluation results, China's onshore CBM resources amount to 36.8 trillion cubic meters, which is equivalent to the onshore conventional natural gas resources (38 trillion cubic meters), second only to Russia and Canada. The main component of coalbed methane is methane. When the concentration of methane in the air reaches 5%-16%, it will explode in open fire, which is the source of coal mine gas explosion accident. The greenhouse effect of coal bed methane (CBM) is about 21 times that of carbon dioxide (CO2) when it is discharged directly into the atmosphere without application. Gas generator power generation can not only effectively deal with coal mine gas accidents, improve the safe consumption conditions of coal mine, but also help to increase the supply of clean energy, reduce greenhouse gas emissions, and achieve multiple purposes of maintaining life, resources and environment.
The air-fuel ratio can be controlled automatically by using the technology of electronic controlled gas mixer to adapt to the change of gas concentration. Meanwhile, the safe delivery technology of low-concentration gas and water mist technology are adopted to deal with the safe delivery of low-concentration gas in the air.
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