沼氣脫硫塔的脫硫工作原理，是借助脫硫吸收劑通過化學反應實現脫硫。脫硫劑具備表面活性與催化氧化特性，能促進二氧化硫的反應，加快碳酸鈣的溶解，促使亞硫酸鈣快速氧化為硫酸鈣，同時強化硫酸鈣的沉淀效果，從而降低液氣比與鈣硫比，減少水分蒸發，以此達成脫硫目的。

　　The working principle of biogas desulfurization tower is to achieve desulfurization through chemical reactions with the help of desulfurization absorbents. Desulfurizers have surface activity and catalytic oxidation characteristics, which can promote the reaction of sulfur dioxide, accelerate the dissolution of calcium carbonate, promote the rapid oxidation of calcium sulfite to calcium sulfate, and enhance the precipitation effect of calcium sulfate, thereby reducing the liquid gas ratio and calcium sulfur ratio, reducing water evaporation, and achieving the purpose of desulfurization.

　　沼氣脫硫塔設備多采用碳鋼材料，裝置的筒體、罐體等部件，需依據預期使用壽命選用對應材質制造，通常使用壽命為 5-8 年，且制造過程均遵循相關規定與規范。

　　The equipment for biogas desulfurization towers often uses carbon steel materials, and the components such as the cylinder and tank body of the device need to be made of corresponding materials according to the expected service life. The typical service life is 5-8 years, and the manufacturing process follows relevant regulations and specifications.

　　硫化氫是一種無色、劇毒且具有腐蝕性的氣體，不僅對人體有強烈毒害作用，還會對沼氣灶產生較強腐蝕。按照規定，民用燃氣中硫化氫含量不得超過 20 毫克 / 立方米，而利用畜禽糞便產生的沼氣，其硫化氫含量一般為 500 毫克 / 立方米，因此農用沼氣在使用前必須進行脫硫處理。

　　Hydrogen sulfide is a colorless, highly toxic, and corrosive gas that not only has a strong toxic effect on the human body, but also causes strong corrosion to biogas stoves. According to regulations, the hydrogen sulfide content in civilian gas must not exceed 20 milligrams per cubic meter, while the hydrogen sulfide content of biogas produced from livestock and poultry manure is generally 500 milligrams per cubic meter. Therefore, agricultural biogas must undergo desulfurization treatment before use.

　　沼氣脫硫塔由脫硫劑和脫硫塔（罐或瓶）構成，脫硫劑分為固體和液體兩種。固體脫硫劑通常采用氧化鐵脫硫，液體脫硫劑則用低濃度堿液吸收沼氣中的硫化氫氣體。當含有硫化氫的沼氣通過脫硫劑時，沼氣中的硫化氫會與脫硫劑發生反應，生成硫化物，進而去除沼氣中的硫化氫。

　　The biogas desulfurization tower consists of desulfurizer and desulfurization tower (tank or bottle), and desulfurizer is divided into solid and liquid types. Solid desulfurizers usually use iron oxide for desulfurization, while liquid desulfurizers use low concentration alkaline solution to absorb hydrogen sulfide gas from biogas. When biogas containing hydrogen sulfide passes through a desulfurizer, the hydrogen sulfide in the biogas will react with the desulfurizer to generate sulfides, thereby removing the hydrogen sulfide from the biogas.

　　無論是固體脫硫劑還是液體脫硫劑，使用一段時間后都需要更換。更換周期取決于沼氣中硫化氫的含量，一般情況下，使用三年左右就需更換一次，否則會導致脫硫效果下降。

　　Both solid and liquid desulfurizers need to be replaced after a period of use. The replacement cycle depends on the content of hydrogen sulfide in the biogas. Generally, it needs to be replaced after about three years of use, otherwise it will lead to a decrease in desulfurization efficiency.

　　在實際應用中，沼氣脫硫塔的脫硫效率受多種因素影響。比如，脫硫劑的填充密度需適中，過密會阻礙沼氣流通，過疏則會降低與硫化氫的接觸效率。同時，沼氣的流速也需控制在合理范圍，流速過快會導致反應不充分，過慢則會影響沼氣的正常供應。此外，環境溫度對脫硫效果也有一定影響，在低溫環境下，可適當采取保溫措施，維持脫硫劑的活性。

　　In practical applications, the desulfurization efficiency of biogas desulfurization towers is influenced by various factors. For example, the filling density of desulfurizer needs to be moderate. If it is too dense, it will hinder the flow of biogas, and if it is too sparse, it will reduce the contact efficiency with hydrogen sulfide. At the same time, the flow rate of biogas also needs to be controlled within a reasonable range. If the flow rate is too fast, it will lead to insufficient reaction, and if it is too slow, it will affect the normal supply of biogas. In addition, the ambient temperature also has a certain impact on the desulfurization effect. In low-temperature environments, appropriate insulation measures can be taken to maintain the activity of the desulfurizer.

　　日常維護中，需定期檢查脫硫塔的密封性，防止沼氣泄漏造成安全隱患。還要觀察脫硫劑的狀態，若固體脫硫劑出現板結、顏色變深，或液體脫硫劑出現渾濁、異味，應及時更換。定期清理脫硫塔內部的雜質與沉淀物，可保持沼氣流通順暢，確保脫硫塔長期穩定運行。

　　In daily maintenance, it is necessary to regularly check the sealing of the desulfurization tower to prevent safety hazards caused by biogas leakage. It is also necessary to observe the state of the desulfurizer. If the solid desulfurizer becomes hardened or the color darkens, or the liquid desulfurizer becomes turbid or has an odor, it should be replaced in a timely manner. Regularly cleaning the impurities and sediment inside the desulfurization tower can maintain smooth flow of biogas and ensure long-term stable operation of the desulfurization tower.

　　合理使用沼氣脫硫塔，能有效降低沼氣中硫化氫的含量，既符合民用燃氣標準，又能減少設備腐蝕，延長沼氣灶等器具的使用壽命，同時保障使用過程中的安全性，讓沼氣這一清潔能源更好地服務于生產生活。

　　Reasonable use of biogas desulfurization towers can effectively reduce the content of hydrogen sulfide in biogas, which not only meets the standards of civilian gas, but also reduces equipment corrosion, prolongs the service life of biogas stoves and other appliances, and ensures safety during use, making biogas, a clean energy source, better serve production and life.

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