Biogas is the product of anaerobic fermentation of biomass and is a high-quality renewable biomass energy. Its main component is CH4 (about 55% - 70%) CO2 (about 30% - 45%), with a small amount of H2S, O2, CO, N2 and other hydrocarbons. The CO2 in the biogas reduces the energy density and calorific value of the biogas and limits the utilization range of the biogas. Therefore, the biogas should be decarburized and purified to reduce the CO2 content.
沼氣提純的技術主要有以下及方面：
Biogas purification technologies mainly include the following aspects:
1. Membrane separation method is an energy-saving CO2 separation and recovery process that has developed rapidly in recent years. This method realizes the separation of biogas by using different solubility and permeability of different components in biogas when passing through the membrane.
2. Chemical absorption method is to use weak alkaline absorption solution to absorb acidic CO2 in the adsorption tower, and then enter the desorption tower under high temperature to complete regeneration, so as to achieve the goal of removing CO2 from biogas.
3、水洗法是利用CO2和CH4在水中溶解度不同，通過物理吸收，實現CO2和CH4的分離目的。
3. The water washing method is to realize the separation of CO2 and CH4 through physical absorption based on the different solubility of CO2 and CH4 in water.
4. The adsorption principle of PSA is to selectively adsorb CO2 in biogas to separate it from CH4 based on the different adsorption capacities of adsorbents for CH4 and CO2.
5. The low-temperature separation method uses the different boiling points of CH4 and CO2 to convert CO2 in biogas into liquid or solid under low temperature conditions, but CH4 remains in a gas state, so as to realize the separation of the two.
There are many biogas purification technologies and processes. Kaifeng Deer Air Separation Plant has mature biogas purification technologies and experience, which can be designed and selected according to users' energy utilization goals.
企業二維碼
2022-10-19
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