沼氣脫硫作為一種新能源，得到越來越廣泛的運用。

Biogas desulfurization, as a new energy source, is being increasingly widely used.

　　1.脫硫的作用

1. The role of desulfurization

　　沼氣中含有微量的硫化氫，略帶臭味，通常用于熱電聯產的燃氣發動機，或用于蒸汽或動力出產的鍋爐。在焚燒過程中，硫化氫將轉化為硫化氫O4。這種酸極具腐蝕性，會在很短時間內損壞發動機或鍋爐。在焚燒前除掉硫化氫是必要的。

Biogas contains trace amounts of hydrogen sulfide, with a slight odor, and is usually used in gas engines for cogeneration, or in boilers for steam or power production. During the incineration process, hydrogen sulfide will be converted into hydrogen sulfide O4. This type of acid is highly corrosive and can quickly damage engines or boilers. It is necessary to remove hydrogen sulfide before incineration.

　　2.進步運用壽數削減運轉本錢

2. Improve the use of lifespan to reduce operating costs

　　硫化氫腐蝕將逐年削減后端用氣設備的壽數，這就是為什么內燃機制造商要求沼氣中的硫化氫不能超過20-200ppm。否則，替換各類配件等修理的運轉費用將大幅度添加。此外，故障越多，修理費將會進步，收入大大降低。為保證體系設備安全，進步設備運用壽數，滿意環保要求，需求去除硫化氫。

Hydrogen sulfide corrosion will gradually reduce the lifespan of backend gas equipment, which is why internal combustion engine manufacturers require that hydrogen sulfide in biogas cannot exceed 20-200ppm. Otherwise, the operating costs of replacing various accessories and repairing them will be significantly increased. In addition, the more malfunctions there are, the more repair costs will increase and the revenue will be greatly reduced. To ensure the safety of system equipment, improve the service life of equipment, and meet environmental requirements, it is necessary to remove hydrogen sulfide.

　　3.保護環境，削減碳減排

3. Protecting the environment and reducing carbon emissions

　　HS2是有毒氣體，未經凈化的沼氣焚燒會導致二氧化硫的排放，形成嚴峻的惡臭問題以及酸雨。為了健康安全，在運用沼氣之前必須要去除硫化氫。

HS2 is a toxic gas, and the incineration of untreated biogas can lead to the emission of sulfur dioxide, resulting in severe odor problems and acid rain. For the sake of health and safety, hydrogen sulfide must be removed before using biogas.

　　4.沼氣脫硫的辦法常用的有：生物脫硫、干法脫硫或濕法脫硫及其他脫硫辦法。

The commonly used methods for biogas desulfurization include biological desulfurization, dry desulfurization, wet desulfurization, and other desulfurization methods.

　　當沼氣從厭氧發酵裝置中產生時，特別是在中高溫下發酵時，它攜帶很多的硫化氫。因為沼氣中仍有很多水蒸氣，水和沼氣中的硫化氫共同作用，加速了金屬管道、閥門、流量計的腐蝕和阻塞。此外，硫化氫焚燒后產生的二氧化硫與焚燒產品中的水蒸氣結合形成亞硫酸，對設備的金屬表面形成腐蝕，還污染大氣環境，影響人體健康。因而，在運用沼氣之前，必須除掉其中的硫化氫。

When biogas is produced from anaerobic fermentation equipment, especially during fermentation at medium and high temperatures, it carries a lot of hydrogen sulfide. Because there is still a lot of water vapor in biogas, the combined action of water and hydrogen sulfide in biogas accelerates the corrosion and blockage of metal pipelines, valves, and flow meters. In addition, the sulfur dioxide generated after hydrogen sulfide incineration combines with the water vapor in the incineration product to form sulfite, which corrodes the metal surface of the equipment and pollutes the atmospheric environment, affecting human health. Therefore, before using biogas, hydrogen sulfide must be removed from it.

　　工業上常用的沼氣脫硫辦法有干法脫硫、濕法脫硫和生物脫硫。

The commonly used methods for biogas desulfurization in industry include dry desulfurization, wet desulfurization, and biological desulfurization.

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