针对发动机对沼气的要求，在沼气发动机前安装处理系统以解决了气源侧与用气侧的矛盾是目前解决沼气发电机组利用问题的有用方法，在沼气发电机生产的时候如何才能避免因沼气的因素对发电机组的影响呢？

According to the requirements of the engine for biogas, installing a treatment system in front of the biogas engine to solve the contradiction between the gas source side and the gas consumption side is a useful method to solve the utilization problem of biogas generator set at present. How can we avoid the influence of biogas factors on the generator set during the production of biogas generator?

沼气发电机组

Biogas Generator Set 

1.降低气体的相对湿度

1. Reduce the relative humidity of gas

水分的脱除，考虑到具体的情况，简单分为凝结水的脱除以及未凝结水脱除两大部分，前者可以采用汽水分离器来实现，后者的实现较为复杂，目前主要有下面几种方式：

Considering the specific situation, water removal is simply divided into condensate removal and non condensate removal. The former can be realized by steam water separator, and the latter is more complex. At present, there are mainly the following ways:

低温除湿：通过制冷设备降低气体的温度，使得其中的水蒸气凝结，然后排除系统；吸附：采用对水有较强吸附作用的吸附剂，将气体中的水分析出；膜过滤：采用特殊结构的膜材料，在特定的条件下将水从气体中分出。

Low temperature dehumidification: reduce the temperature of gas through refrigeration equipment to condense the water vapor, and then discharge the system; Adsorption: the adsorbent with strong adsorption on water is used to analyze the water in the gas; Membrane filtration: membrane material with special structure is used to separate water from gas under specific conditions.

2.降低气体杂质成分含量

2. Reduce the content of gas impurities

气体中的杂质是比较复杂的成分，由于是针对发动机的利用，所以对杂质的判断主要以发动机的要求为准，主要有下面几种：

The impurities in the gas are complex components. Since they are used for the engine, the judgment of impurities is mainly based on the requirements of the engine, mainly including the following:

（1）硫的去除：以硫化氢为主的硫化物的去除主要有物理、化学以及生物三种方式。其中物理方法主要指物理吸附方式脱硫，这种方式操作简便，但往往需要占地较大的设备，而且吸附剂需要再生。化学方式指以化学反应的方式将硫固化下来，目前有干法及湿法，其差别主要是反应物的物理形态是固体还是液体的差别。生物法脱硫是目前比较新兴的一种方式，其主要原理是在反应罐中培养出合适的菌种，这些菌种以硫化物为养料，将其中的硫固定下来。对于硫含量不高的气体，采用物理吸附或者干法脱硫一般比较经济实用，而且操作简便。

(1) Sulfur removal: the removal of sulfide dominated by hydrogen sulfide mainly includes physical, chemical and biological methods. Among them, physical method mainly refers to physical adsorption desulfurization, which is easy to operate, but often requires large equipment, and the adsorbent needs to be regenerated. Chemical method refers to the solidification of sulfur by chemical reaction. At present, there are dry method and wet method. The difference is mainly whether the physical form of reactants is solid or liquid. Biological desulfurization is a relatively new way at present. Its main principle is to cultivate appropriate bacteria in the reaction tank. These bacteria use sulfide as nutrient to fix the sulfur. For the gas with low sulfur content, physical adsorption or dry desulfurization is generally economical and practical, and the operation is simple.

（2）粉尘（颗粒物）的去除：

(2) Removal of dust (particulate matter):

通常采用过滤的方式将颗粒物限制在一定的范围内。另外，某些颗粒可以在吸附的环节去除掉，为达到较好的去除效果，一般对气体中的颗粒物分级处理，设置不同精度的过滤器，逐级将颗粒物处理到系统的要求，这样不仅可以降低精 密过滤的成本，也可以增加系统运行的可靠性。

Filtration is usually used to limit particulate matter to a certain range. In addition, some particles can be removed in the process of adsorption. In order to achieve better removal effect, the particles in the gas are generally treated by stages, and filters with different accuracy are set to treat the particles to the requirements of the system step by step, which can not only reduce the cost of precision filtration, but also increase the reliability of system operation.

这些操作利用外部手段使沼气的成分与沼气发电机组的操作性能更加匹配，提升机械生产的质量，降低生产时机械的磨损，实现效益的大化，相信这也是众多机械发电生产商的共同追求。

These operations use external means to better match the composition of biogas with the operating performance of biogas generator set, improve the quality of mechanical production, reduce the wear of machinery during production, and realize the maximization of benefits. I believe this is also the common pursuit of many mechanical power generation manufacturers.