Under low temperature conditions, the biogas generator unit is easy to be excessively cooled, resulting in failure to start. The editor will introduce the following ways to successfully start the biogas generator set at low temperature:

循環(huán)水加熱系統(tǒng)(也稱燃油加熱器加熱系統(tǒng))

Circulating water heating system (also known as fuel heater heating system)

1.這是近幾年新采用的低溫輔助啟動方式，這種低溫啟動方式是通過燃油加熱器附帶的水泵將發(fā)動機機體內(nèi)的冷卻液抽出，通過燃油加熱器將其加熱后再循環(huán)至發(fā)動機機體內(nèi)，以此加熱發(fā)動機，達到低溫條件下啟動發(fā)動機的目的。

1. This is a new low-temperature auxiliary starting method adopted in recent years. This low-temperature starting method is to pump out the coolant in the engine body through the water pump attached to the fuel heater, heat it and recycle it to the engine body through the fuel heater, so as to heat the engine and achieve the purpose of starting the engine under low temperature conditions.

2.火焰預(yù)熱啟動

2. Flame preheating start

火焰預(yù)熱裝置的工作溫度為-40℃，工作過程為電子自動控制?；鹧骖A(yù)熱起動裝置一般由電子控制器、電磁閥、溫度傳感器、火焰預(yù)熱塞及燃油管和導(dǎo)線組成。該裝置的工作過程是，將電熱塞加熱到850-950℃后接通起動機，電磁閥自動打開油路，通過燃油管向電熱塞供油，進行火焰預(yù)熱啟動。

The working temperature of the flame preheating device is -40 ℃, and the working process is electronic automatic control. The flame preheating starting device is generally composed of electronic controller, solenoid valve, temperature sensor, flame preheating plug, fuel pipe and wire. The working process of the device is to heat the glow plug to 850-950 ℃, turn on the starter, the solenoid valve automatically opens the oil circuit, and supply oil to the glow plug through the fuel pipe for flame preheating and startup.

3.加注冷起動液

3. Fill cold starting liquid

冷起動液是一種輔助啟動燃料(由乙醚，低揮發(fā)點的碳氫化合物和帶有添加劑的低凝點機油組成)，其中加入的帶有添加劑的低凝點機油可改善氣缸壁的潤滑條件，達到啟動的目的。選擇這種啟動方式啟動時，應(yīng)選霧化情況較好的起動液，并控制好噴射時間、噴入位置和噴入量。另外，切忌從空氣濾清器的進氣口直接噴入起動液，以免影響空濾器濾芯的質(zhì)量和加大起重液的噴入量，造成發(fā)動機冷機啟動運轉(zhuǎn)超速。

Cold starting fluid is an auxiliary starting fuel (composed of ether, low volatile hydrocarbon and low pour point engine oil with additives). The low pour point engine oil with additives can improve the lubrication conditions of cylinder wall and achieve the purpose of starting. When this starting method is selected, the starting liquid with good atomization should be selected, and the injection time, injection position and injection amount should be well controlled. In addition, do not spray starting fluid directly from the air inlet of the air filter, so as not to affect the quality of the air filter element and increase the injection amount of lifting fluid, resulting in overspeed of engine cold start.

4.其他的預(yù)熱方式

4. Other preheating methods

除上述預(yù)熱方式外，還可采用熱水預(yù)熱法(將熱至沸點的熱水注放冷卻系)蒸汽預(yù)熱法(上蒸汽通過管道從水箱的下水管進入冷卻系，或直接進入發(fā)動機冷卻水套)、電預(yù)熱法(將加熱器直接插入冷卻系或機油內(nèi)，此法熱效率高，發(fā)電機組使用也比較方便)等多種方法進行低溫啟動。

In addition to the above preheating methods, many other methods can be used for low-temperature start-up, such as hot water preheating method (injecting hot water to the boiling point into the cooling system), steam preheating method (the upper steam enters the cooling system from the lower pipe of the water tank through the pipe, or directly into the engine cooling water jacket), electric preheating method (inserting the heater directly into the cooling system or engine oil, which has high thermal efficiency and is convenient for the use of the generator set).

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