沼氣發電機對沼氣的要求需滿足穩定燃燒、設備安全及高效運行，指標如下：

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

甲烷濃度：需≥50%（理想值 55-65%），每降低 1% 發電量減少約 2%，可通過在線紅外檢測儀實時監測

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%，過高會降低熱值，需通過氣水分離裝置優化

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

硫化氫濃度：≤20ppm（非耐硫機型需≤5ppm），超過 50ppm 將加速發動機腐蝕，建議采用生物脫硫 + 干法脫硫組合工藝

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、雜質控制

2、 Impurity control

水分：露點溫度≤-10℃（環境溫度 25℃時），可通過冷干機 + 硅膠吸附雙重脫水

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?，超過 10mg/m3 將導致火花塞積碳，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?（燃氣輪機需≤10mg/m3），可采用電捕焦油器 + 陶瓷濾芯過濾

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

三、運行參數

3、 Operating parameters

供氣壓力：需穩定在 3-10kPa（根據機型調整），波動超過 ±1kPa 會影響燃燒效率，建議配置穩壓罐

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

進氣溫度：≤40℃，高溫環境需增加空冷器，避免爆震風險

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

粉塵粒徑：≤5μm，需配置精度 0.1μm 的三級過濾系統

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

四、預處理要求

4、 Preprocessing requirements

脫硫裝置：采用氧化鐵脫硫劑（穿透硫容≥30%），每 2000 小時需再生或更換

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

脫水系統：配置自動排水閥，排水頻率根據產氣濕度調整（建議每小時排水 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)

過濾精度：采用燒結金屬濾芯，壓差超過 0.1MPa 時需反吹清洗

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

五、監測與維護

5、 Monitoring and maintenance

在線監測：安裝沼氣成分分析儀（如 ABB AO2020），實時監控甲烷、硫化氫、壓力等參數

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

定期檢測：每月送樣檢測硅氧烷、焦油含量，每季度校驗熱值儀

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

應急處理：當硫化氫超標時自動切換備用脫硫塔，水分超標時啟動旁路干燥

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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