沼气发电机对沼气的要求需满足稳定燃烧、设备安全及高效运行，指标如下：

The biogas generator requires stable combustion, equipment safety, and efficient operation of biogas, with the following core indicators:

一、成分要求

1、 Ingredient requirements

甲烷浓度：需≥50%（理想值 55-65%），每降低 1% 发电量减少约 2%，可通过在线红外检测仪实时监测

Methane concentration: It needs to be ≥ 50% (ideal value 55-65%), and for every 1% decrease in power generation, the reduction is about 2%, which can be monitored in real time by an online infrared detector

二氧化碳含量：≤45%，过高会降低热值，需通过气水分离装置优化

Carbon dioxide content: ≤ 45%. If it is too high, it will reduce the calorific value and needs to be optimized through a gas water separation device

硫化氢浓度：≤20ppm（非耐硫机型需≤5ppm），超过 50ppm 将加速发动机腐蚀，建议采用生物脱硫 + 干法脱硫组合工艺

Hydrogen sulfide concentration: ≤ 20ppm (≤ 5ppm for non sulfur resistant models), exceeding 50ppm will accelerate engine corrosion. It is recommended to use a combination of biological desulfurization and dry desulfurization process

二、杂质控制

2、 Impurity control

水分：露点温度≤-10℃（环境温度 25℃时），可通过冷干机 + 硅胶吸附双重脱水

Moisture: Dew point temperature ≤ -10 ℃ (at ambient temperature of 25 ℃), can be dehydrated through double dehydration using a refrigerated dryer and silica gel adsorption

硅氧烷：≤5mg/m?，超过 10mg/m³ 将导致火花塞积碳，需配置活性炭吸附塔

Siloxanes: ≤ 5mg/m?， Exceeding 10mg/m ³ will result in carbon buildup on spark plugs, requiring the installation of an activated carbon adsorption tower

焦油：≤50mg/m?（燃气轮机需≤10mg/m³），可采用电捕焦油器 + 陶瓷滤芯过滤

Tar: ≤ 50mg/m? (Gas turbine requires ≤ 10mg/m ³), electric tar catcher+ceramic filter can be used for filtration

三、运行参数

3、 Operating parameters

供气压力：需稳定在 3-10kPa（根据机型调整），波动超过 ±1kPa 会影响燃烧效率，建议配置稳压罐

Gas supply pressure: It needs to be stable at 3-10kPa (adjusted according to the model). Fluctuations exceeding ± 1kPa will affect combustion efficiency. It is recommended to install a stabilizing tank

进气温度：≤40℃，高温环境需增加空冷器，避免爆震风险

Intake temperature: ≤ 40 ℃. In high-temperature environments, an air cooler needs to be added to avoid the risk of detonation

粉尘粒径：≤5μm，需配置精度 0.1μm 的三级过滤系统

Dust particle size: ≤ 5 μ m, requiring a three-stage filtration system with an accuracy of 0.1 μ m

四、预处理要求

4、 Preprocessing requirements

脱硫装置：采用氧化铁脱硫剂（穿透硫容≥30%），每 2000 小时需再生或更换

Desulfurization device: using iron oxide desulfurizer (with a sulfur penetration capacity of ≥ 30%), which needs to be regenerated or replaced every 2000 hours

脱水系统：配置自动排水阀，排水频率根据产气湿度调整（建议每小时排水 1-2 次）

Dehydration system: equipped with an automatic drainage valve, the drainage frequency is adjusted according to the humidity of the produced gas (it is recommended to drain 1-2 times per hour)

过滤精度：采用烧结金属滤芯，压差超过 0.1MPa 时需反吹清洗

Filtration accuracy: sintered metal filter element is used, and when the pressure difference exceeds 0.1MPa, it needs to be backwashed for cleaning

五、监测与维护

5、 Monitoring and maintenance

在线监测：安装沼气成分分析仪（如 ABB AO2020），实时监控甲烷、硫化氢、压力等参数

Online monitoring: Install a biogas composition analyzer (such as ABB AO2020) to monitor real-time parameters such as methane, hydrogen sulfide, and pressure

定期检测：每月送样检测硅氧烷、焦油含量，每季度校验热值仪

Regular testing: monthly sample testing for siloxane and tar content, quarterly verification of calorimeter

应急处理：当硫化氢超标时自动切换备用脱硫塔，水分超标时启动旁路干燥

Emergency response: Automatically switch to the backup desulfurization tower when hydrogen sulfide exceeds the standard, and start the bypass drying when moisture exceeds the standard

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