1. 根据瓦斯浓度选 “发动机类型”

1. Select "engine type" based on gas concentration

低浓度瓦斯（5%-30%）由于甲烷含量较低，需要选择专门设计的 “低浓度瓦斯发动机”，这类发动机采用预混燃烧技术，能在瓦斯浓度波动时稳定运行；高浓度瓦斯（30% 以上）则可以使用常规的气体发动机，但需注意配置可靠的防爆装置，确保燃烧安全。

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. 根据用电需求定 “功率大小”

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

首先计算所有用电设备的总功率，包括同时运行的大功率设备（如水泵、电机）。发电机组的额定功率应比总负载高 20%-30%，以应对设备启动时的瞬时电流。例如，总负载为 1000 千瓦的矿区，建议选择 1200-1500 千瓦的机组，避免长期过载导致设备寿命缩短。

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. 关注 “排放处理” 与 “效率参数”

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

虽然瓦斯燃烧比煤炭清洁，但仍需处理氮氧化物等污染物。选择配备尾气处理装置的机组，确保排放符合当地环保要求（如氮氧化物浓度低于 500 毫克 / 立方米）。同时，发电效率是重要指标，高效机组的发电效率可达 35%-40%，意味着每立方米瓦斯能发出更多的电，长期使用更节省燃料。

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. 考虑 “安装环境” 与 “配套设施”

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

发电机组需要安装在通风良好、远离明火的场所，地面需做硬化处理，防止设备振动导致基础沉降。同时，要配套建设瓦斯储罐、预处理装置和配电系统，确保气源稳定和电力输出安全。例如，在多雨的南方矿区，需为发电机组搭建防雨棚，避免电气元件受潮损坏。

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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