需要按照沼氣發電機組的檢查方法檢查沼氣發電機組的工作情況，并進行斷缸試驗，看個別氣缸是否不工作或工作不正常，并對每個氣缸進行比較；氣缸內是否有漏氣現象；氣門間隙是否正常。確認上述部位均無故障后，確定故障可能發生在沼氣廠。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:

沼氣動力閥間隙太小，沼氣流量不夠，混合氣太稀。調整動力閥。國Ⅲ系列沼氣發電機組的動力閥安裝在減壓器出口處。動力閥有刻度。R(-)的方向是減小的，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.

檢查沼氣過濾器是否堵塞。

Check whether the biogas filter is blocked.

檢查壓力平衡管是否泄漏或損壞。

Check the pressure balance pipe for leaks or damage.

檢查增壓中冷系統是否漏氣，檢查排氣管墊、增壓器接口、中冷器、混合器、進氣管及各連接硅膠管，增壓器是否損壞。

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.

排氣管或三元催化器堵塞，導致排氣阻力增大。

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

檢查空氣濾清器是否完好，進氣管路是否暢通。

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

檢查沼氣步進電機與減速機、攪拌機出風口之間的管路。

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

混合器膜損壞，不能形成合理的空燃比。更換膠片。

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

中低壓減壓閥二次閥板行程太小。

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

減壓器電磁閥的閥芯和閥孔是否損壞，進氣量不夠，更換電磁閥。

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.

檢查低壓減壓器的膜片、彈簧、連桿是否損壞。

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

此外，當沼氣發電機組發生故障時，操作人員應冷靜、仔細地分析故障特點，確定原因。當發電機組運行中出現異常現象時，可以通過看、聽、摸、聞等方法綜合判斷是哪個部分或哪個系統出現故障。

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：觀察各儀表的讀數，排煙的顏色，水、氣、油的變化；聽：用細長的金屬棒或木頭螺絲刀當聽診器，觀察聲音及其變化；觸摸：通過觸摸檢查氣門機構、發動機振動等部件的工作情況；嗅：聞發動機有異味的地方。

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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