沼气中的硫化氢和水形成弱酸，会腐蚀发动机的管路和金属零件，尤其是铜铝零件。因此，管道、中冷器、涡轮增压器和活塞部件，如油漆、瓷器等。应该氮化保护。此外，由于硫化氢燃烧的产物二氧化硫的耐腐蚀性较好，燃烧室和排气管的周边部分应考虑防腐措施。

Hydrogen sulfide and water in biogas form weak acids, which can corrode engine pipelines and metal parts, especially copper and aluminum parts. Therefore, pipelines, intercoolers, turbochargers, and piston components such as paint, porcelain, etc. It should be nitrided for protection. In addition, due to the good corrosion resistance of sulfur dioxide, the product of hydrogen sulfide combustion, anti-corrosion measures should be considered for the surrounding parts of the combustion chamber and exhaust pipe.

有时，沼气发动机组在不使用时会被搁置很长时间。错位时间长了，再启动就容易失灵。那么沼气发动机长期放置的注意事项如下：

Sometimes, biogas engine sets are left unused for a long time. If the misalignment time is too long, it is easy to malfunction when restarting. The precautions for long-term placement of biogas engines are as follows:

1.在进气口加入少量水机油，盘车使其附着在活塞顶部、气缸套内壁和气门密封面上，将气门设置在关闭状态，使气缸套与外界隔绝。

1. Add a small amount of water and engine oil to the intake port, turn the engine to attach it to the top of the piston, the inner wall of the cylinder liner, and the valve sealing surface. Set the valve in the closed position to isolate the cylinder liner from the outside world.

2.当确定沼气发动机不会长时间使用时，要尽可能排干冷却水和润滑油。让沼气发电机组干净。

When it is determined that the biogas engine will not be used for a long time, it is necessary to drain the cooling water and lubricating oil as much as possible. Clean the biogas generator set.

3.盖住空气滤清器、排气管和油箱，防止灰尘落入。

3. Cover the air filter, exhaust pipe, and fuel tank to prevent dust from falling in.

4.确保沼气发动机组清洁。去除表面的灰尘和油污。

4. Ensure that the biogas engine set is clean. Remove surface dust and oil stains.

5.取下沼气发动机的气门盖，用刷子涂上少量无水机油，刷在摇臂等部位。

5. Remove the valve cover of the biogas engine, apply a small amount of anhydrous engine oil with a brush, and brush it on the rocker arm and other parts.

6.沼气发动机应放置在通风良好、干燥和清洁的地方。严禁与化学品(如化肥、农药)一起存放。

6. The biogas engine should be placed in a well ventilated, dry, and clean place. It is strictly prohibited to store together with chemicals (such as fertilizers and pesticides).

下面沼气发电机组厂家总结在选购沼气发电机组时的几点建议：

Below are a few suggestions from biogas generator manufacturers when selecting biogas generators:

1.根据沼气产量，选择合适的装机容量，防止机械设备闲置或沼气浪费

1. Select an appropriate installed capacity based on biogas production to prevent mechanical equipment from being idle or biogas waste

2.1000KW左右的沼气发生器市场占有率高，价格高，维护、检修、保养费用相对较低

A biogas generator with a market share of around 2.1000KW has a high price and relatively low maintenance, repair, and upkeep costs

3.当采用多台发电机组时，宜采用1000KW左右的同一规格型号，以减少运行费用和备件储存。量少的时候选功率小一点的。如1000KW加1.500 kW，以便在气源变化较大时调节输出功率，保证发电机组在70%以上功率输出

When using multiple generator sets, it is advisable to use the same specification and model of around 1000KW to reduce operating costs and spare parts storage. Choose a smaller power when the quantity is small. Add 1.500 kW to 1000KW in order to adjust the output power when there is a significant change in the gas source, ensuring that the generator set outputs more than 70% of the power