The gas drainage system has been installed according to the requirements of the national coal mine safety management department, and the gas drainage system must operate normally; Secondly, the pure gas drainage capacity of the gas drainage system is about 1 million m3/year, and the gas concentration is between 6-25%. Achieving these two conditions can provide the foundation for building a gas power station, which can be achieved if the gas power station is built; Promoting pumping by utilization and promoting safety by pumping; The benign cycle of coal mine development.

高低濃度瓦斯的劃分：

Classification of high and low concentration gas:

煤礦瓦斯分高濃度瓦斯和低濃度瓦斯，高濃度瓦斯是指瓦斯（甲烷）濃度大于25%的瓦斯，低濃度瓦斯是指瓦斯濃度低于25%的瓦斯。我國60%以上的瓦斯是含甲烷25%以下的低濃度瓦斯，按煤礦安全規程要求，瓦斯濃度在25%以下的就不能貯存和輸送。

Coal mine gas is divided into high concentration gas and low concentration gas. High concentration gas refers to gas with a gas (methane) concentration greater than 25%, and low concentration gas refers to gas with a gas concentration lower than 25%. More than 60% of China's gas is low concentration gas that contains less than 25% methane. According to coal mine safety regulations, gas with a concentration of less than 25% cannot be stored and transported.

低濃度瓦斯發電基本要求：

Basic requirements for low concentration gas power generation:

1、按國家煤礦安全管理部門的要求安裝了瓦斯抽放系統,并且瓦斯抽放系統須正常運行；

1. The gas drainage system has been installed according to the requirements of the national coal mine safety management department, and the gas drainage system must operate normally;

2、瓦斯抽放系統純瓦斯抽放量在100萬m3/年左右，瓦斯濃度在6-25%之間。

2. The pure gas drainage capacity of the gas drainage system is about 1 million m3/year, and the gas concentration is between 6-25%.

機組對瓦斯的要求：

Requirements of the unit for gas:

在距離燃氣機組燃氣進氣閥1m內

Within 1m from the gas intake valve of the gas turbine

1、瓦斯溫度≤40℃；

1. Gas temperature ≤ 40 ℃;

2、瓦斯壓力3～20kpa ，壓力變化率≤1kpa/min；

2. The gas pressure is 3 to 20 kpa, and the pressure change rate is ≤ 1 kpa/min;

3、H2S≤200mg/Nm3；

3、H2S≤200mg/Nm3；

4、對于CH4體積含量，高濃度瓦斯發電機組要求甲烷含量在25%以上，低濃度瓦斯發電機組要求甲烷含量在12%-25%可以正常啟動。

4. For CH4 volume content, high concentration gas generator sets require a methane content of more than 25%, and low concentration gas generator sets require a methane content of 12% - 25% to be able to start normally.

5、瓦斯中水分含量≤40g/N m3

5. Moisture content in gas ≤ 40g/N m3

6、雜質粒度≤μm，雜質含量≤30mg/N m3。

6. Impurity particle size ≤ μ m. Impurity content ≤ 30mg/N m3.

如果可燃氣體中含硫及氨成分較高，不僅會嚴重腐蝕火花塞電極，而且會使機油中的酸值增加腐蝕機組內部零件，同時易于生成沉淀物，增加對發動機的磨損和腐蝕。

If the sulfur and ammonia content in the combustible gas is high, it will not only seriously corrode the spark plug electrode, but also increase the acid value in the engine oil and corrode the internal parts of the unit. At the same time, it is easy to generate sediment, increasing the wear and corrosion of the engine.

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