1. 根據瓦斯濃度選 “發動機類型”

1. Select "engine type" based on gas concentration

低濃度瓦斯（5%-30%）由于甲烷含量較低，需要選擇專門設計的 “低濃度瓦斯發動機”，這類發動機采用預混燃燒技術，能在瓦斯濃度波動時穩定運行；高濃度瓦斯（30% 以上）則可以使用常規的氣體發動機，但需注意配置可靠的防爆裝置，確保燃燒安全。

Low concentration gas (5% -30%) requires a specially designed "low concentration gas engine" due to its low methane content. This type of engine uses premixed combustion technology and can operate stably when the gas concentration fluctuates; Conventional gas engines can be used for high concentration gas (over 30%), but reliable explosion-proof devices should be installed to ensure combustion safety.

2. 根據用電需求定 “功率大小”

2. Determine the "power size" based on electricity demand

首先計算所有用電設備的總功率，包括同時運行的大功率設備（如水泵、電機）。發電機組的額定功率應比總負載高 20%-30%，以應對設備啟動時的瞬時電流。例如，總負載為 1000 千瓦的礦區，建議選擇 1200-1500 千瓦的機組，避免長期過載導致設備壽命縮短。

Firstly, calculate the total power of all electrical equipment, including high-power devices running simultaneously (such as water pumps and motors). The rated power of the generator set should be 20% -30% higher than the total load to cope with the instantaneous current during equipment start-up. For example, in a mining area with a total load of 1000 kilowatts, it is recommended to choose units with a capacity of 1200-1500 kilowatts to avoid long-term overload and shorten equipment life.

3. 關注 “排放處理” 與 “效率參數”

3. Pay attention to "emission treatment" and "efficiency parameters"

雖然瓦斯燃燒比煤炭清潔，但仍需處理氮氧化物等污染物。選擇配備尾氣處理裝置的機組，確保排放符合當地環保要求（如氮氧化物濃度低于 500 毫克 / 立方米）。同時，發電效率是重要指標，高效機組的發電效率可達 35%-40%，意味著每立方米瓦斯能發出更多的電，長期使用更節省燃料。

Although gas combustion is cleaner than coal, pollutants such as nitrogen oxides still need to be treated. Select units equipped with exhaust gas treatment devices to ensure emissions meet local environmental requirements (such as nitrogen oxide concentrations below 500 milligrams per cubic meter). At the same time, power generation efficiency is an important indicator, and the power generation efficiency of high-efficiency units can reach 35% -40%, which means that more electricity can be generated per cubic meter of gas, and long-term use is more fuel-efficient.

4. 考慮 “安裝環境” 與 “配套設施”

4. Consider "installation environment" and "supporting facilities"

發電機組需要安裝在通風良好、遠離明火的場所，地面需做硬化處理，防止設備振動導致基礎沉降。同時，要配套建設瓦斯儲罐、預處理裝置和配電系統，確保氣源穩定和電力輸出安全。例如，在多雨的南方礦區，需為發電機組搭建防雨棚，避免電氣元件受潮損壞。

The generator set needs to be installed in a well ventilated area away from open flames, and the ground needs to be hardened to prevent equipment vibration from causing foundation settlement. At the same time, it is necessary to construct gas storage tanks, pre-treatment devices, and power distribution systems to ensure stable gas sources and safe power output. For example, in the rainy southern mining areas, it is necessary to build rain shelters for the generator sets to prevent electrical components from being damaged by moisture.

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