The pollution problem caused by smoke exhaust of gas generator set is out of line with the current environment, but gas generator set, as the choice of emergency power supply, plays an indelible role, so people in the industry hope to keep the important role of gas generator set and reduce its pollution problem to a low level, Here are several ways to improve the gas generator pollution.

從進(jìn)氣系統(tǒng)入手

Start with the intake system

瓦斯發(fā)電機(jī)組進(jìn)氣系統(tǒng)主要是將經(jīng)過灰塵、雜質(zhì)過濾的空氣送入氣缸內(nèi)通過對(duì)進(jìn)氣系統(tǒng)的改進(jìn)，控制進(jìn)入的空氣量能有用減少燃燒后的空氣污染。

The air intake system of gas generator set mainly sends the air filtered by dust and impurities into the cylinder. Through the improvement of the air intake system, controlling the amount of air entering can effectively reduce the air pollution after combustion.

1．采用可變渦流進(jìn)氣系統(tǒng)

1. Variable swirl intake system is adopted

由于進(jìn)氣渦流強(qiáng)度對(duì)NOx的排放影響較大，采用可變渦流進(jìn)氣系統(tǒng)的方式依據(jù)轉(zhuǎn)速和負(fù)荷的變化來控制渦流強(qiáng)度，可在不犧牲經(jīng)濟(jì)性的情況下降低NO。的生成量．

Because the intensity of intake swirl has a great influence on NOx emission, adopting the variable swirl intake system to control the intensity of swirl according to the change of speed and load can reduce no without sacrificing economy. The amount of production

2．采用多氣門技術(shù)

2. Adopt multi valve technology

采用多氣門技術(shù)(通常采用每缸四氣門：進(jìn)氣門和排氣門各2個(gè))可擴(kuò)大進(jìn)、排氣門的總流通截面積，充量系數(shù)增加，且噴油器可垂直布置在汽缸軸線上，有利于燃油在燃燒室空間中均勻分布，其混合氣形成和燃燒條件大為改善，使放熱規(guī)律更為合理，尾氣排敏中NOx的排放下降，CO的排放也有所減少，而且炭煙在大負(fù)荷時(shí)也明顯下降。

The multi valve technology (usually four valves per cylinder: two inlet valves and two exhaust valves) can enlarge the total flow area of inlet and exhaust valves, increase the charge coefficient, and the injector can be vertically arranged on the cylinder axis, which is conducive to the uniform distribution of fuel in the combustion chamber space, greatly improve the mixture formation and combustion conditions, and make the heat release law more reasonable, The emission of NOx and CO in the exhaust gas decreased, and the soot also decreased significantly under heavy load.

燃油摻水的方法有進(jìn)氣管噴水和乳化柴油等。

The methods of mixing water in fuel include spray water in intake pipe and emulsified diesel oil.

1、進(jìn)氣管噴水

1. Intake pipe spray water

進(jìn)氣管噴水的主要作用是吸熱和稀釋燃油密度。當(dāng)少量水進(jìn)入燃燒室并霧化良好時(shí)，由于水蒸氣的“微爆”作用使油滴破碎成更小的油滴，因而促進(jìn)了混合氣的形成和燃燒．在燃燒過程中由于水的吸熱作用可使高燃燒溫度降低，如水與油混合噴入可降低燃油密度，使高燃燒溫度進(jìn)一步降低，因此NOx排放減少。需要注意的是冬季儲(chǔ)水箱需防凍，并要求隨負(fù)荷大小自動(dòng)調(diào)節(jié)噴水量等。

The main function of water injection in intake pipe is to absorb heat and dilute fuel density. When a small amount of water enters the combustion chamber and atomizes well, the oil droplets are broken into smaller oil droplets due to the "micro explosion" effect of water vapor, thus promoting the formation and combustion of mixture. In the combustion process, the high combustion temperature can be reduced due to the heat absorption effect of water. For example, the injection of water and oil mixture can reduce the fuel density and further reduce the high combustion temperature, so the NOx emission is reduced. It should be noted that the water storage tank should be antifreezed in winter, and the water spray volume should be automatically adjusted with the load.

2、乳化柴油

2. Emulsified diesel oil

在柴油中摻水，即乳化柴油，由于其“徽爆”作用，使其燃油霧化良I好，井促使燃燒室內(nèi)的空氣形成強(qiáng)烈紊流，燃油與空氣的分布更加均勻，生成的炭煙減少．水蒸氣的水煤氣反應(yīng)也使炭煙排放降低。另外，乳化柴油可降低高燃燒溫度，因此NOx生成量減少。

The emulsified diesel oil mixed with water, because of its "explosive" effect, makes the fuel atomized well, promotes the air in the combustion chamber to form strong turbulence, makes the distribution of fuel and air more uniform, and reduces the soot generated. The water gas reaction of water vapor also reduces the soot emission. In addition, emulsified diesel can reduce the high combustion temperature, so the NOx production is reduced.