化合物脱硫
Compound desulfurization
常温下，沼气根据脱硫剂料层和沼气中的沼气H2S与活性化合物接触，将硫化氢吸收到化合物的小孔中，产生三硫化二铁。当有水时，铁的硫酸盐转化为化合物和硫单质，脱硫再生过程可循环进行。
At normal temperature, the biogas will absorb hydrogen sulfide into the pores of the compound according to the contact between the desulfurizer material layer and the biogas H2S in the biogas and the active compound to produce ferric sulfide. When there is water, the sulfate of iron is converted into compounds and elemental sulfur, and the desulfurization and regeneration process can be carried out circularly.
脱硫反映：
Desulfurization reaction:
→
→
再生反映：
Regeneration reaction:
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该方法可在有氧或无氧环境中脱硫，操作温度范围广(5-90°C),脱硫水平达到99%.强度高，脱硫技术成熟，效率高，投资低，操作成本高。当脱硫剂饱和时，化合物也可以再生。
This method can be used for desulfurization in aerobic or anaerobic environment, with wide operating temperature range (5-90 ° C) and desulfurization level of 99%. It has high strength, mature desulfurization technology, high efficiency, low investment and high operating cost. When the desulfurizer is saturated, the compound can also be regenerated.
生物脱硫
Biological desulfurization
使用无色硫细菌，如氧化硫杆菌.氧化亚铁硫杆菌，在微氧条件下氧化。H2S氧化成硫单质。生物脱硫技术的关键是如何根据生物脱硫技术的要点H2S不同浓度控制反映中提供溶解氧的浓度H2S含量，进入沼气中2%16%的空气，以满足生物氧化硫酸盐的需要。温度适中.反应速度和空气量可以使反应速度和空气量能够使反应速度和空气量能够使反应速度和空气量能够使反应速度和空气量能够使H2S降低50PPm。
Colorless sulfur bacteria, such as Thiobacillus ferrooxidans and Thiobacillus ferrooxidans, are used for oxidation under micro-oxygen conditions. H2S is oxidized to sulfur. The key of biological desulfurization technology is how to control the concentration of dissolved oxygen in the reaction according to the different concentration of H2S, the key point of biological desulfurization technology, and enter 2% 16% of the air in biogas to meet the need of biological oxidation of sulfate. The temperature is moderate. The reaction speed and air volume can make the reaction speed and air volume can make the reaction speed and air volume can make the reaction speed and air volume can make the reaction speed and air volume reduce the H2S to 50PPm.
渗碳工艺
Carburizing process
沼气渗碳的常用方法主要有水洗法.胺洗法.变压吸附法.膜分离法等。
The common methods of methane carburization include water washing, amine washing, pressure swing adsorption, membrane separation, etc.
渗碳工艺依据:原料气的组成.压力.产品规格和质量标准.工艺的复杂性、可靠性和操作方便性.估价整体运营成本和运营成本等。
Carburizing process basis: composition of feed gas, pressure, product specification and quality standard, complexity, reliability and operation convenience of the process, evaluation of overall operating cost and operating cost, etc.
水洗法
Water washing method
洗涤法是一种物理吸收法，选用1-2MPa洗涤压力，去除沼气中的二氧化碳。水来源丰富，由于二氧化碳水的溶解度远高于甲烷，甲烷损失较小。
The washing method is a physical absorption method, which uses 1-2MPa washing pressure to remove carbon dioxide from biogas. The water source is rich. Because the solubility of carbon dioxide water is much higher than that of methane, the loss of methane is small.
胺洗法
Amine washing method
胺洗法的工作原理与水洗法相似，但用较强的酸性偏碱胺溶液代替普通水，可获得较高的甲烷纯度和较高的回收率，可同时去除硫化氢。
The working principle of the amine washing method is similar to that of the water washing method, but the higher purity of methane and the higher recovery rate can be obtained by replacing the ordinary water with the stronger acidic meta-alkali amine solution, and the hydrogen sulfide can be removed at the same time.
变压吸附法
Pressure swing adsorption
二氧化碳在充压过程中被吸收在某种材料表面，在充压环境中被吸收。当压力降低时，二氧化碳自然释放，然后再生吸收剂，循环。该技术被广泛使用。甲烷纯度高，可在室温和非高压下工作，无需加热，经济；设备.操作简单，维护简单.可循环.它可以完全自动化。气体中含有这种气体。H2S它会吸附在吸附材料上，破坏吸附材料的结构。
Carbon dioxide is absorbed on the surface of certain materials during the pressure filling process, and is absorbed in the pressure filling environment. When the pressure decreases, the carbon dioxide will be released naturally, and then the absorbent will be regenerated and recycled. This technology is widely used. With high purity of methane, it can work at room temperature and non-high pressure without heating, which is economical and energy-saving; Equipment. Simple operation, simple maintenance, recyclable. It can be completely automated. The gas contains this gas. H2S will adsorb on the adsorption material and destroy the structure of the adsorption material.
膜分离法
Membrane separation method
这种方法是近年来去除沼气中酸性气体的一种新方法。由于沼气中各种气体在中空纤维膜中的渗透速度不同，CO2等酸性气体渗入速度快，先逸出，而甲烷气体渗入速度慢，终逸出，达到分离效果。
This method is a new method to remove acid gas from biogas in recent years. Due to the different permeation rates of various gases in the biogas in the hollow fiber membrane, acid gases such as CO2 permeate quickly and escape first, while methane permeates slowly and finally escapes to achieve the separation effect.
适用于膜分离法CO2.原料气分离含量强，选择一级二级膜分离可提高商品气的纯度。现在市场上有很多电影制造商，但产品质量水平不均匀。建议选择MEDAL膜，性能稳定.寿命长.CH4回收效率高的特点。并选择工艺步骤。MEDAL设计，工艺步骤简单.整体撬装占地空间小.移动性强。此外，膜分离是一种物理分离，不存在吸收和再生问题，无变化，零污染问题，无动设备，设备简单，能耗低。
It is applicable to membrane separation method with strong separation content of CO2. Feed gas. Selecting primary to secondary membrane separation can improve the purity of commercial gas. There are many film manufacturers on the market now, but the product quality level is uneven. It is recommended to select MEDAL membrane with stable performance, long service life and high recovery efficiency of CH4. And select the process step. MEDAL patented design, simple process steps, small overall skid space and strong mobility. In addition, membrane separation is a physical separation, without absorption and regeneration problems, no change, zero pollution problems, no moving equipment, simple equipment and low energy consumption.
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2023-02-22
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