在养殖场、污水处理厂等沼气产出场景中，沼气发电本是“变废为宝”的好项目——既能处理废弃物，又能产生清洁能源。但不少从业者却直呼“又爱又恨”，吐槽沼气发电机组不好用：有的用两千多小时就出故障，差的几百小时就报废，维修成本居高不下。可同样的机组，在油田、天然气领域却能稳定运行八千小时。这到底是怎么回事？今天就结合实操经验，给大家科普沼气发电机组“不好用”的核心原因，帮大家理清其中的关键门道。

　　In biogas production scenarios such as farms and sewage treatment plants, biogas power generation is a good project to turn waste into treasure - it can not only treat waste but also generate clean energy. However, many practitioners call it "love and hate" and complain roast biogas generating units are not easy to use: some of them break down after more than 2000 hours, and some of them are scrapped after hundreds of hours, with high maintenance costs. However, the same unit can operate stably for 8000 hours in the fields of oil fields and natural gas. What the hell is going on here? Today, based on practical experience, we will explain to you the core reasons why biogas generators are not easy to use, and help you clarify the key tricks involved.

　　先给大家讲个真实案例：我们十天前刚修补完一个养殖场的5万立方生物质气设施，之前因气管脱落导致沼气全部泄漏，重新安装后仅十天左右，池子就全鼓起来了，产气速度特别快，测算日产量不低于8000立方，整体效益本该很好。而这个项目的发电机组，稳定运行了四五千小时都没出问题。核心原因很简单——这里的沼气硫化氢含量低，对发电机的腐蚀性极小。反观很多其他养殖场，发电机组寿命大幅缩短，本质问题就出在沼气的前期预处理上。

　　Let me give you a real case first: We just repaired a 50000 cubic meter biomass gas facility in a breeding farm ten days ago. Previously, all the biogas leaked due to the detachment of the gas pipe. After reinstalling it, the pool was fully inflated in just about ten days, and the gas production rate was particularly fast. The estimated daily output was not less than 8000 cubic meters, and the overall benefit should have been very good. And the generator set of this project has been running stably for four to five thousand hours without any problems. The core reason is simple - the hydrogen sulfide content in the biogas here is low, and its corrosiveness to the generator is minimal. On the other hand, in many other breeding farms, the lifespan of the generator set has been significantly shortened, and the fundamental problem lies in the pre-treatment of biogas in the early stage.

　　可能有人会疑惑，现在发电机组的品质一直在提升，为啥到了沼气领域就“水土不服”？关键不在于机组本身，而在于沼气中的杂质，尤其是硫化氢。硫化氢是强腐蚀性气体，哪怕含量不高，长期接触也会严重损坏发电机组的核心部件。之前遇到不少养殖场客户，发电机组用几百到两千多小时就被腐蚀，根本原因就是沼气中的硫化氢没处理干净，持续侵蚀设备内部结构，最终导致故障停机。

　　Some people may wonder why the quality of generator sets has been constantly improving, and why is it so difficult to adapt to the biogas industry? The key is not the unit itself, but the impurities in the biogas, especially hydrogen sulfide. Hydrogen sulfide is a highly corrosive gas, and even if its content is not high, long-term exposure can seriously damage the core components of the generator set. Previously, we encountered many customers in breeding farms where the generator set was corroded after several hundred to two thousand hours. The root cause was that the hydrogen sulfide in the biogas was not completely removed, which continued to erode the internal structure of the equipment and ultimately led to a malfunction and shutdown.

　　而预处理不到位的核心症结，在于成本敏感下的工艺选择偏差。对国内大多数客户来说，都希望控制前期投入，普遍存在“发电机成本不能比脱硫成本高”的认知。这就导致一个关键问题：本应做好的脱硫工艺被简化。要知道，高效的脱硫工艺比如湿法脱硫，虽然脱硫效果好，能稳定控制硫化氢含量，但造价高昂，大多客户难以接受。无奈之下，很多项目只能选择成本更低的干法脱硫。

　　The core issue of inadequate preprocessing lies in the process selection deviation under cost sensitivity. For most domestic customers, they hope to control the initial investment, and there is a common perception that the cost of generators cannot be higher than that of desulfurization. This leads to a key issue: the desulfurization process that should have been done well is simplified. You should know that efficient desulfurization processes such as wet desulfurization have good desulfurization effects and can stably control hydrogen sulfide content, but they are expensive and difficult for most customers to accept. Helpless, many projects can only choose the lower cost dry desulfurization method.

　　可干法脱硫的弊端十分明显，这也是发电机组“短命”的直接导火索。干法脱硫依赖脱硫剂吸附硫化氢，但脱硫剂有明确的使用周期，前500小时左右还能勉强达标，超过这个时间后，脱硫效果会急剧下降，无法有效拦截硫化氢。而很多客户忽略了脱硫剂的更换周期，或者为了省成本拖延更换，导致未被去除的硫化氢直接进入发电机组，持续腐蚀部件。久而久之，设备自然频繁出故障，使用寿命大幅缩短。

　　The drawbacks of dry desulfurization are very obvious, which is also the direct trigger for the "short life" of the generator set. Dry desulfurization relies on desulfurizers to adsorb hydrogen sulfide, but desulfurizers have a clear usage cycle. They can barely meet the standard for the first 500 hours, but after this time, the desulfurization effect will sharply decrease and cannot effectively intercept hydrogen sulfide. However, many customers overlook the replacement cycle of desulfurizers or delay replacement in order to save costs, resulting in untreated hydrogen sulfide directly entering the generator set and continuously corroding components. Over time, the equipment naturally experiences frequent malfunctions, resulting in a significant reduction in its lifespan.

　　这里要明确一个关键认知：沼气发电项目好不好用，核心不在发电机组的品质，而在前期的沼气预处理，尤其是脱硫环节。同样的机组，在硫化氢含量低的沼气环境中能稳定运行数千小时，在脱硫不到位的环境中就频繁报废，足以说明预处理的重要性。很多人误以为“上了发电机组就能稳定发电”，却忽略了沼气本身的特性，跳过了必要的预处理步骤，最终导致项目失败。

　　Here we need to clarify a key understanding: whether a biogas power generation project is effective or not depends not on the quality of the generator set, but on the early biogas pretreatment, especially the desulfurization process. The same unit can operate stably for thousands of hours in biogas environments with low hydrogen sulfide content, but is frequently scrapped in environments with inadequate desulfurization, which demonstrates the importance of pretreatment. Many people mistakenly believe that 'stable power generation can be achieved by installing a generator set', but ignore the characteristics of biogas itself, skip necessary pre-treatment steps, and ultimately lead to project failure.

　　针对养殖领域的沼气发电项目，我们今年也明确了核心方向：必须把脱硫、脱水工艺做到位。不管客户对成本多敏感，都要优先保障预处理效果，通过合理的工艺设计，将沼气中的硫化氢等杂质控制在发电机组能接受的范围。比如定期更换脱硫剂，根据产气规模和硫化氢含量优化脱硫流程，必要时采用多级脱硫工艺，从根源上减少对设备的腐蚀。只有这样，才能提高发电机组的综合利用效率，让沼气发电真正发挥效益。

　　For biogas power generation projects in the aquaculture industry, we have also clarified the core direction this year: we must put desulfurization and dehydration processes in place. No matter how cost sensitive the customer is, priority should be given to ensuring the pre-treatment effect. Through reasonable process design, impurities such as hydrogen sulfide in biogas should be controlled within the acceptable range of the generator set. For example, regularly replacing desulfurizers, optimizing desulfurization processes based on gas production scale and hydrogen sulfide content, and adopting multi-stage desulfurization processes when necessary to reduce equipment corrosion at the root. Only in this way can the comprehensive utilization efficiency of the generator set be improved, and the benefits of biogas power generation be truly realized.

　　可能有客户会担心，做好脱硫工艺会大幅增加成本。但从长远来看，这其实是“省钱”的关键。前期省了脱硫的投入，后期发电机组频繁维修、更换的成本更高，还会耽误正常发电，损失更多收益。与其等到设备报废再补救，不如在前期就做好预处理，选择适配的脱硫工艺，平衡成本与效果。

　　Some customers may be concerned that implementing effective desulfurization processes will significantly increase costs. But in the long run, this is actually the key to 'saving money'. In the early stage, the investment in desulfurization was saved, but in the later stage, the cost of frequent maintenance and replacement of the generator set is higher, which will also delay normal power generation and result in a loss of more revenue. Instead of waiting until the equipment is scrapped for remediation, it is better to do a good job of pre-treatment in the early stage, choose a suitable desulfurization process, and balance cost and effectiveness.

　　总结下来，沼气发电机组“不好用”的根源，不是设备品质不行，而是前期沼气预处理不到位，尤其是脱硫工艺选择不当、维护不及时。对想上沼气发电项目的养殖企业来说，千万别只盯着发电机组的成本，忽略了脱硫、脱水这些基础环节。只有把沼气“净化”到位，让发电机组在安全的气体环境中运行，才能避免频繁故障，真正实现沼气发电的经济效益和环保价值。如果正在规划或运营沼气发电项目，不妨先检查一下自身的预处理工艺，这才是解决问题的核心所在。

　　In summary, the root cause of the "poor usability" of biogas generators is not the poor quality of the equipment, but the inadequate pre-treatment of biogas in the early stage, especially the improper selection and untimely maintenance of desulfurization processes. For breeding enterprises that want to invest in biogas power generation projects, they should not only focus on the cost of the generator set and ignore the basic links such as desulfurization and dehydration. Only by thoroughly purifying biogas and allowing the generator set to operate in a safe gas environment can frequent failures be avoided, truly realizing the economic benefits and environmental value of biogas power generation. If you are planning or operating a biogas power generation project, you may want to first check your pre-treatment process, which is the core of solving the problem.

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