Low-concentration coal-bed methane engine anti-explosion gas supply system and operation method

Abstract

The invention discloses a low-concentration coal-bed methane engine anti-explosion gas supply system and an operation method. The low-concentration coal-bed methane engine anti-explosion gas supply system comprises a gas conveying pipeline. A coal-bed methane extraction device is installed at the head of the gas conveying pipeline. Starting from the outlet of the coal-bed methane extraction device, an anti-static device, a water and dust removal device, a coal-bed methane content regulating device and a coal-bed methane pressure adjustment device which are controlled through a control cabinet are sequentially arranged on the gas conveying pipeline in the output direction of coal-bed methane. A coal-bed methane and air mixing device is arranged at the tail of the gas conveying pipeline and used for feeding gas mixed by the coal-bed methane and air mixing device into a coal-bed methane engine for combustion and doing work, and then the coal-bed methane engine drives a generator to work. By means of the method, the low-concentration coal-bed methane can be safely extracted and conveyed, the low-concentration coal-bed methane enables the engine to operate continuously and stably after being regulated, and therefore the purposes of saving energy and reducing emission are achieved.

Description

technical field [0001] The invention relates to the technical field of a coalbed methane engine and a coalbed methane generating set, and more particularly relates to a low-concentration coalbed methane engine explosion-proof gas supply system and a method for operating the system. Background technique [0002] Coalbed methane is a mixture of methane-based hydrocarbons and air. China's coalbed methane resources amount to 36.8 trillion m 3 , the recoverable resources are about 10 trillion m 3 . If coalbed methane is effectively utilized, it can make up nearly one-third of the natural gas gap. However, due to technical and other factors, the utilization rate of coalbed methane data in China is relatively low. In terms of greenhouse benefits, methane is more than 20 times that of carbon dioxide, and the direct discharge of coalbed methane into the atmosphere not only causes waste of energy but also pollutes the environment. Inspired by relevant national policies, coal minin...

AI Technical Summary

Problems solved by technology

However, low-concentration coalbed methane with a concentration of less than 15% is prone to explosion during transportation within the range of the detonation limit, and safety accidents are likely to occur if special safety measures are not adopted.

In addition, because the concentration of coalbed methane changes during the extraction process, especially for low-concentration coalbed methane, due to concentration fluctuations, problems such as difficulty in ignition and power fluctuations occur during the working process of the engine.

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