警示！沼氣不脫硫直接使用=毀設(shè)備+污環(huán)境，90%企業(yè)踩過這個(gè)明顯坑在環(huán)保與資源化利用政策推動(dòng)下，沼氣已成為養(yǎng)殖場(chǎng)、酒廠、污水處理廠等場(chǎng)景的重要清潔能源，但據(jù)行業(yè)調(diào)研數(shù)據(jù)顯示，90%的企業(yè)在沼氣利用中存在一個(gè)明顯誤區(qū)——忽視沼氣脫硫環(huán)節(jié)，直接將沼氣池產(chǎn)出的沼氣用于發(fā)電、燒鍋爐，殊不知，未經(jīng)脫硫的沼氣中含有大量硫化氫等雜質(zhì)，不僅會(huì)嚴(yán)重腐蝕設(shè)備，導(dǎo)致設(shè)備維修成本激增，還會(huì)污染環(huán)境，違反環(huán)保標(biāo)準(zhǔn)。結(jié)合沼氣利用實(shí)操經(jīng)驗(yàn)與行業(yè)規(guī)范，詳解沼氣脫硫的必要性、核心流程、主流技術(shù)及應(yīng)用場(chǎng)景，幫助企業(yè)避開誤區(qū)，實(shí)現(xiàn)沼氣資源化利用、碳減排與降本增效的雙贏。

　　Warning! Direct use of biogas without desulfurization=equipment destruction+environmental pollution. 90% of enterprises have stepped into this fatal pit. Under the promotion of environmental protection and resource utilization policies, biogas has become an important clean energy source in breeding farms, distilleries, sewage treatment plants and other scenarios. However, according to industry research data, 90% of enterprises have a fatal misconception in biogas utilization - ignoring the biogas desulfurization process and directly using the biogas produced by the biogas digester for power generation and boiler burning. Little do they know, the desulfurized biogas contains a large amount of impurities such as hydrogen sulfide, which not only seriously corrodes equipment, leading to a surge in equipment maintenance costs, but also pollutes the environment and violates environmental standards. Combining practical experience and industry standards in biogas utilization, this article elaborates on the necessity, core processes, mainstream technologies, and application scenarios of biogas desulfurization, helping enterprises avoid misunderstandings and achieve a win-win situation of biogas resource utilization, carbon reduction, cost reduction, and efficiency improvement.

　　沼氣從沼氣池產(chǎn)出后，無法直接用于發(fā)電或其他用途，核心原因是其含有高濃度硫化氫（H?S），我國環(huán)保標(biāo)準(zhǔn)明確規(guī)定，沼氣利用時(shí)H?S含量不得超過20mg/m?，超標(biāo)使用不僅違規(guī)，還會(huì)引發(fā)一系列問題。硫化氫具有強(qiáng)腐蝕性，與沼氣中的水蒸氣共同作用，會(huì)加速管道、閥門、發(fā)電設(shè)備的腐蝕和堵塞，據(jù)統(tǒng)計(jì)，未經(jīng)脫硫的沼氣直接使用，設(shè)備腐蝕速率提升75%，平均設(shè)備使用壽命縮短4-6年，每年維修成本增加3萬-8萬元，部分企業(yè)甚至因設(shè)備腐蝕嚴(yán)重，被迫停工檢修，造成巨大經(jīng)濟(jì)損失。

　　After biogas is produced from biogas digesters, it cannot be directly used for power generation or other purposes. The core reason is that it contains high concentrations of hydrogen sulfide (H2S). China's environmental standards clearly stipulate that the H2S content during biogas utilization shall not exceed 20mg/m? Excessive use not only violates regulations, but also triggers a series of problems. Hydrogen sulfide has strong corrosiveness and works together with water vapor in biogas to accelerate the corrosion and blockage of pipelines, valves, and power generation equipment. According to statistics, the direct use of desulfurized biogas increases equipment corrosion rate by 75%, shortens the average equipment service life by 4-6 years, and increases annual maintenance costs by 30000 to 80000 yuan. Some enterprises are even forced to shut down for maintenance due to severe equipment corrosion, causing huge economic losses.

　　此外，硫化氫燃燒后會(huì)生成SO?，與水蒸氣結(jié)合形成亞硫酸，進(jìn)一步腐蝕燃燒設(shè)備，同時(shí)污染大氣環(huán)境，影響人體健康，這也是沼氣利用前脫硫的核心原因。沼氣脫硫的核心目的，就是去除其中的硫化氫雜質(zhì)，使其達(dá)到使用標(biāo)準(zhǔn)，脫硫完成后，沼氣可直接用于發(fā)電、燒鍋爐，若想升級(jí)為天然氣，則需在脫硫后進(jìn)行第二步——提純提醇，去除二氧化碳等雜質(zhì)，提升甲烷純度，達(dá)到《進(jìn)入天然氣長輸管道的氣體質(zhì)量要求》相關(guān)標(biāo)準(zhǔn)。

　　In addition, the combustion of hydrogen sulfide generates SO?, which combines with water vapor to form sulfurous acid, further corroding combustion equipment and polluting the atmospheric environment, affecting human health. This is also the core reason why desulfurization is necessary before the utilization of biogas. The core purpose of biogas desulfurization is to remove hydrogen sulfide impurities to meet the usage standards. After desulfurization, biogas can be directly used for power generation and boiler burning. If you want to upgrade to natural gas, you need to perform the second step after desulfurization - purification and alcohol extraction, removal of impurities such as carbon dioxide, and improvement of methane purity to meet the relevant standards of "Gas Quality Requirements for Entering Natural Gas Long distance Pipeline".

　　需明確的是，脫硫與提醇同屬沼氣凈化流程，且遵循“先脫硫、后提純”的原則，這是因?yàn)榱蚧瘹涞膹?qiáng)腐蝕性，若先進(jìn)行提純，會(huì)嚴(yán)重?fù)p壞提純?cè)O(shè)備，增加凈化成本。目前，行業(yè)內(nèi)常見的沼氣脫硫方式主要有三類，適配不同場(chǎng)景需求：生物脫硫技術(shù)成熟、運(yùn)行成本低，綜合運(yùn)行成本低于每立方沼氣2分錢，適合大規(guī)模沼氣處理；絡(luò)合鐵脫硫效率高，可快速去除高濃度硫化氫；氧化鐵干法脫硫簡(jiǎn)易、成本較低，適合沼氣量小、硫化氫濃度低的場(chǎng)景。

　　It should be clarified that desulfurization and alcohol extraction belong to the same process of biogas purification, and the principle of "desulfurization first, purification later" must be followed. This is because hydrogen sulfide is highly corrosive. If purification is carried out first, it will seriously damage the purification equipment and increase the purification cost. At present, there are three common methods for biogas desulfurization in the industry, which are suitable for different scenarios: mature biological desulfurization technology, low operating costs, and comprehensive operating costs of less than 2 cents per cubic meter of biogas, suitable for large-scale biogas treatment; Complex iron has high desulfurization efficiency and can quickly remove high concentrations of hydrogen sulfide; Iron oxide dry desulfurization is simple, efficient, and cost-effective, suitable for scenarios with low biogas production and low hydrogen sulfide concentration.

　　其中，生物脫硫作為新興技術(shù)，在國外已廣泛應(yīng)用，國內(nèi)也逐步推廣，其通過專用菌種將硫化氫轉(zhuǎn)化為單質(zhì)硫，實(shí)現(xiàn)環(huán)保脫硫，典型案例顯示，該技術(shù)脫硫效率可達(dá)99%以上；干法脫硫則通過氧化鐵等填料氧化硫化氫，設(shè)備構(gòu)成簡(jiǎn)單，無需復(fù)雜操作，適合中小型企業(yè)；濕法脫硫則多用于大型工程，常與干法結(jié)合，先粗脫硫再精脫硫，確保脫硫效果達(dá)標(biāo)。

　　Among them, biological desulfurization, as an emerging technology, has been widely applied abroad and gradually promoted domestically. It converts hydrogen sulfide into elemental sulfur through specialized bacterial strains, achieving environmentally friendly and efficient desulfurization. Typical cases show that the desulfurization efficiency of this technology can reach over 99%; Dry desulfurization uses fillers such as iron oxide to oxidize hydrogen sulfide. The equipment is simple in composition and does not require complex operations, making it suitable for small and medium-sized enterprises; Wet desulfurization is commonly used in large-scale projects and is often combined with dry desulfurization. It involves coarse desulfurization followed by fine desulfurization to ensure that the desulfurization effect meets the standard.

　　沼氣脫硫的應(yīng)用場(chǎng)景十分廣泛，核心集中在養(yǎng)殖場(chǎng)、酒廠、污水處理廠、生物天然氣廠等，這些場(chǎng)景產(chǎn)生的沼氣產(chǎn)量大、硫化氫濃度高，若不進(jìn)行脫硫處理，不僅無法實(shí)現(xiàn)資源化利用，還會(huì)造成環(huán)境污染。據(jù)數(shù)據(jù)顯示，完成脫硫處理的沼氣，資源化利用率可提升80%以上，同時(shí)可減少60%以上的硫化物排放，助力企業(yè)實(shí)現(xiàn)碳減排目標(biāo)，契合當(dāng)前環(huán)保發(fā)展趨勢(shì)。

　　The application scenarios of biogas desulfurization are very wide, with the core concentrated in breeding farms, distilleries, sewage treatment plants, biogas plants, etc. These scenarios generate large biogas production and high hydrogen sulfide concentration. If desulfurization treatment is not carried out, not only can resource utilization not be achieved, but environmental pollution can also be caused. According to data, the resource utilization rate of biogas treated with desulfurization can be increased by more than 80%, while reducing sulfide emissions by more than 60%, helping enterprises achieve carbon reduction goals and in line with current environmental development trends.

　　反觀部分企業(yè)，因忽視沼氣脫硫，不僅面臨設(shè)備損壞、環(huán)保處罰的風(fēng)險(xiǎn)，還浪費(fèi)了寶貴的清潔能源。例如，某大型養(yǎng)殖場(chǎng)曾因未對(duì)沼氣脫硫，直接用于發(fā)電，導(dǎo)致發(fā)電設(shè)備僅使用1年就出現(xiàn)嚴(yán)重腐蝕，維修耗時(shí)1個(gè)月，直接經(jīng)濟(jì)損失超過10萬元，同時(shí)因廢氣排放超標(biāo)，被處以高額罰款。

　　On the other hand, some enterprises, due to neglecting biogas desulfurization, not only face the risk of equipment damage and environmental penalties, but also waste valuable clean energy. For example, a large livestock farm was once fined heavily for not desulfurizing biogas and directly using it for power generation, resulting in severe corrosion of the power generation equipment after only one year of use. The maintenance took one month, and the direct economic loss exceeded 100000 yuan. At the same time, due to excessive exhaust emissions, the farm was fined heavily.

　　綜上，沼氣脫硫是沼氣資源化利用的必經(jīng)環(huán)節(jié)，更是企業(yè)規(guī)避設(shè)備損耗、環(huán)保風(fēng)險(xiǎn)的關(guān)鍵。企業(yè)需摒棄“省成本”的短視思維，根據(jù)自身沼氣產(chǎn)量、硫化氫濃度，選擇適配的脫硫技術(shù)，嚴(yán)格遵循“先脫硫、后提純”的流程，才能更好地發(fā)揮沼氣的清潔能源價(jià)值，既降低設(shè)備維修和環(huán)保成本，又實(shí)現(xiàn)碳減排目標(biāo)，在環(huán)保與效益之間找到平衡點(diǎn)，推動(dòng)企業(yè)綠色可持續(xù)發(fā)展。

　　In summary, biogas desulfurization is a necessary step in the resource utilization of biogas, and it is also the key for enterprises to avoid equipment loss and environmental risks. Enterprises need to abandon the short-sighted thinking of "cost saving", choose suitable desulfurization technologies based on their own biogas production and hydrogen sulfide concentration, strictly follow the process of "desulfurization first, purification later", in order to fully tap into the clean energy value of biogas, reduce equipment maintenance and environmental costs, and achieve carbon reduction goals, find a balance between environmental protection and efficiency, and promote green and sustainable development of enterprises.

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