Landfill gas pretreatment is produced in the process of landfill, which is a by-product of degradable organic matter in the process of degradation. Its main components are methane and carbon dioxide, which are colorless and odorless gases. The source of odorous substances is some trace components. Generally speaking, the content of methane in landfill gas is 50-60%, carbon dioxide is 40-50%, and the content of trace components is 40-50% If these gases are directly discharged into the atmosphere, there will be a lot of flammable and explosive safety hazards, and it will also cause serious pollution to the environment, the greenhouse effect is serious, and it is also a waste of resources and energy. Landfill gas recovery has a wide range of applications, such as power generation or as fuel energy, among which gas power generation is the most common way.
Landfill power plant uses landfill gas fuel to generate power to drive gas-fired generating units to generate electricity. The landfill gas is collected to the power station through the gas collection pipeline of the landfill, and the gas collected from the gas well header contains a lot of harmful components and moisture, which seriously affects the operation of the gas-fired power generation unit. Generally, when the landfill gas is recycled, it is usually pretreated to ensure that the clean gas meeting the power generation requirements of the gas-fired power generation unit is provided The system is installed in the front of the gas generator air inlet pipeline, which is a very important equipment for landfill gas power generation project.
The pretreatment device of landfill gas collects landfill gas through gas absorption device, sends it to impurity separator to remove impurities, and desulfurization device removes hydrogen sulfide in landfill gas. After that, the dust or fine particles are removed by the primary filtration device, the initial dehydration is carried out by the cooling dehydration device, the water vapor is removed by the gas-liquid separator, and then the negative pressure is extracted by the blower, and then the impurities are further removed by the precision filter, so as to obtain the landfill gas that has been preliminarily treated, which has a good landfill purification pretreatment effect and effectively removes the toxic and harmful impurities.