沼气提纯主要目的是去除二氧化碳获得高纯度甲烷。沼气提纯技术多源于天然气、合成氨变换气的脱碳技术。由于沼气的处理量远小于天然气或合成氨变换气，在脱碳技术选择上应更注重小型化、节能化。目前沼气提纯技术大致可分为：吸附、吸收、膜分离、低温提纯。
The main purpose of biogas purification is to remove carbon dioxide and obtain high-purity methane. Biogas purification technology mostly comes from the decarbonization technology of natural gas and synthetic ammonia. Since the treatment capacity of biogas is far less than that of natural gas or synthetic ammonia, more attention should be paid to miniaturization and energy saving in the selection of decarbonization technology. At present, biogas purification technology can be roughly divided into adsorption, absorption, membrane separation and low-temperature purification.
应用广泛的沼气提纯技术主要包括：变压吸附、水洗、有机溶剂物理吸收、有机溶剂化学吸收、高压膜分离和低温提纯。下表为六种沼气提纯技术的关键参数。
Widely used biogas purification technologies mainly include pressure swing adsorption, water washing, physical absorption of organic solvents, chemical absorption of organic solvents, high-pressure membrane separation and low-temperature purification. The following table shows the key parameters of six biogas purification technologies.
加压水洗法用得多；在德国，变压吸附法更为广泛；在荷兰，加压水洗法、变压吸附法和膜分离技术应用都比较普遍。下表为五种沼气提纯技术的经济比较。
Pressurized water washing method is most used; In Germany, PSA is more extensive; In the Netherlands, pressurized water washing, pressure swing adsorption and membrane separation technology are widely used. The following table shows the economic comparison of five biogas purification technologies.
注：耗电成本（12~18欧分/kWh），耗热成本（3~5欧分/kWh），水费用为5欧元/m³（含污水处理费）。未考虑进一步的处理成本（如分离硅氧烷或氨气）。所有值都是基于满负荷运转情况。

Note: power consumption cost (12 ~ 18 euro cents / kWh), heat consumption cost (3 ~ 5 euro cents / kWh), water cost is 5 euro / M & sup3; (including sewage treatment fee). Further treatment cost (such as separation of siloxane or ammonia) is not considered. All values are based on full load operation.
沼气提纯成本与原料气甲烷含量以及成品甲烷含量有关甲烷含量高的原始沼气提纯成本更低。这主要由于能量输出的增加，而总成本与高能级有关。可以通过提高效率（降低单位输出能耗），使用高热值的原始沼气降低实际能耗，从而降低成本。
The cost of biogas purification is related to the methane content of feed gas and finished products. The cost of raw biogas purification with high methane content is lower. This is mainly due to the increase of energy output, and the total cost is related to the high energy level. The actual energy consumption can be reduced by improving the efficiency (reducing the energy consumption per unit output) and using the original biogas with high calorific value, so as to reduce the cost.
沼气提纯站的经济效益还与其他因素有关，例如，可操作性和额定负荷。沼气提纯站的额定运行负荷不仅取决于提纯站自身的高度稳定性，而且与原始沼气流量和后续单元（如充电站和加气站）的可靠性有关。
The economic benefit of biogas purification station is also related to other factors, such as operability and rated load. The rated operating load of biogas purification station not only depends on the high stability of the purification station itself, but also related to the original biogas flow and the reliability of subsequent units (such as charging station and gas filling station).
停机时间短，设备运行良好，在额定负荷和足够原料气的条件下设备能正常连续运行，是一个沼气提纯站高效可用的标准。快速响应时间非常必要，因此由技术供应商提供良好网络服务至关重要。此外，还可以采用远程监控，当操作被中断，技术人员可以直接发现故障，根据故障类型立即采取必要的补救措施，避免了时间延误，不需要服务技术人员长途跋涉到达现场解决问题。
With short shutdown time and good equipment operation, the equipment can operate normally and continuously under the condition of rated load and sufficient feed gas. It is an efficient and available standard for biogas purification station. Fast response time is very necessary, so it is very important for technology suppliers to provide good network services. In addition, remote monitoring can also be adopted. When the operation is interrupted, technicians can directly find the fault and take necessary remedial measures immediately according to the fault type, so as to avoid time delay and do not need service technicians to travel long distances to the site to solve the problem.
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The above is the main content of biogas desulfurization. Please continue to pay attention to us for more wonderful contents: https://www.hneee.net