需要按照沼气发电机组的检查方法检查沼气发电机组的工作情况，并进行断缸试验，看个别气缸是否不工作或工作不正常，并对每个气缸进行比较；气缸内是否有漏气现象；气门间隙是否正常。确认上述部位均无故障后，确定故障可能发生在沼气厂。故障排除方法：

It is necessary to check the working condition of the biogas generator set according to the inspection method of the biogas generator set, and conduct the cylinder breaking test to see whether individual cylinders do not work or work normally, and compare each cylinder; Whether there is air leakage in the cylinder; Check whether the valve clearance is normal. After confirming that there is no fault in the above parts, it is determined that the fault may occur in the biogas plant. Troubleshooting:

沼气动力阀间隙太小，沼气流量不够，混合气太稀。调整动力阀。国Ⅲ系列沼气发电机组的动力阀安装在减压器出口处。动力阀有刻度。R(-)的方向是减小的，L()的方向是增加的。

The clearance of biogas power valve is too small, the biogas flow is not enough, and the mixture is too thin. Adjust the power valve. The power valve of the national III series biogas generator set is installed at the outlet of the pressure reducer. The power valve has a scale. The direction of R (-) is decreasing, and the direction of L () is increasing.

检查沼气过滤器是否堵塞。

Check whether the biogas filter is blocked.

检查压力平衡管是否泄漏或损坏。

Check the pressure balance pipe for leaks or damage.

检查增压中冷系统是否漏气，检查排气管垫、增压器接口、中冷器、混合器、进气管及各连接硅胶管，增压器是否损坏。

Check whether the supercharging intercooling system has air leakage, and check whether the exhaust pipe gasket, supercharger interface, intercooler, mixer, air inlet pipe, connecting silicone pipes and supercharger are damaged.

排气管或三元催化器堵塞，导致排气阻力增大。

The exhaust pipe or three-way catalyst is blocked, resulting in increased exhaust resistance.

检查空气滤清器是否完好，进气管路是否畅通。

Check whether the air filter is intact and whether the air inlet pipeline is unblocked.

检查沼气步进电机与减速机、搅拌机出风口之间的管路。

Check the pipeline between the biogas stepper motor and the air outlet of the reducer and mixer.

混合器膜损坏，不能形成合理的空燃比。更换胶片。

The mixer membrane is damaged and cannot form a reasonable air-fuel ratio. Change the film.

中低压减压阀二次阀板行程太小。

The stroke of secondary valve plate of medium and low pressure reducing valve is too small.

减压器电磁阀的阀芯和阀孔是否损坏，进气量不够，更换电磁阀。

Check whether the valve core and valve hole of the pressure reducer solenoid valve are damaged and whether the air intake is insufficient. Replace the solenoid valve.

检查低压减压器的膜片、弹簧、连杆是否损坏。

Check whether the diaphragm, spring and connecting rod of the low-pressure reducer are damaged.

此外，当沼气发电机组发生故障时，操作人员应冷静、仔细地分析故障特点，确定原因。当发电机组运行中出现异常现象时，可以通过看、听、摸、闻等方法综合判断是哪个部分或哪个系统出现故障。

In addition, when the biogas generator unit fails, the operator shall calmly and carefully analyze the fault characteristics and determine the cause. When abnormal phenomena occur in the operation of the generator set, it can comprehensively judge which part or system has failed by looking, listening, touching, smelling and other methods.

看：观察各仪表的读数，排烟的颜色，水、气、油的变化；听：用细长的金属棒或木头螺丝刀当听诊器，观察声音及其变化；触摸：通过触摸检查气门机构、发动机振动等部件的工作情况；嗅：闻发动机有异味的地方。

Look: observe the readings of each instrument, the color of smoke exhaust, and the changes of water, gas and oil; Listening: use a slender metal rod or wood screwdriver as a stethoscope to observe the sound and its changes; Touch: check the working conditions of valve mechanism, engine vibration and other components through touch; Smell: smell the place where the engine has peculiar smell.

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