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.

从进气系统入手

Start with the intake system

瓦斯发电机组进气系统主要是将经过灰尘、杂质过滤的空气送入气缸内通过对进气系统的改进，控制进入的空气量能有用减少燃烧后的空气污染。

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．采用可变涡流进气系统

1. Variable swirl intake system is adopted

由于进气涡流强度对NOx的排放影响较大，采用可变涡流进气系统的方式依据转速和负荷的变化来控制涡流强度，可在不牺牲经济性的情况下降低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．采用多气门技术

2. Adopt multi valve technology

采用多气门技术(通常采用每缸四气门：进气门和排气门各2个)可扩大进、排气门的总流通截面积，充量系数增加，且喷油器可垂直布置在汽缸轴线上，有利于燃油在燃烧室空间中均匀分布，其混合气形成和燃烧条件大为改善，使放热规律更为合理，尾气排敏中NOx的排放下降，CO的排放也有所减少，而且炭烟在大负荷时也明显下降。

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.

燃油掺水的方法有进气管喷水和乳化柴油等。

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

1、进气管喷水

1. Intake pipe spray water

进气管喷水的主要作用是吸热和稀释燃油密度。当少量水进入燃烧室并雾化良好时，由于水蒸气的“微爆”作用使油滴破碎成更小的油滴，因而促进了混合气的形成和燃烧．在燃烧过程中由于水的吸热作用可使高燃烧温度降低，如水与油混合喷入可降低燃油密度，使高燃烧温度进一步降低，因此NOx排放减少。需要注意的是冬季储水箱需防冻，并要求随负荷大小自动调节喷水量等。

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

在柴油中掺水，即乳化柴油，由于其“徽爆”作用，使其燃油雾化良I好，井促使燃烧室内的空气形成强烈紊流，燃油与空气的分布更加均匀，生成的炭烟减少．水蒸气的水煤气反应也使炭烟排放降低。另外，乳化柴油可降低高燃烧温度，因此NOx生成量减少。

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.