沼气提纯成天然气，到底要花多少钱？一文算清成本与收益

　　How much does it cost to purify biogas into natural gas? Calculate costs and benefits in one article

　　很多做沼气利用、环保项目的朋友，都有一个共同的疑问：把沼气提纯成天然气，到底要花多少钱？能不能赚钱？今天就不绕弯子，实打实地跟大家唠唠，一分钟帮大家算明白沼气提纯的成本账，从前期投资到后期运营，再到回本周期，每一笔都讲透彻，不玩虚的、不搞专业术语，新手也能一看就懂，再也不用为成本和收益的事儿发愁。

　　Many friends who work on biogas utilization and environmental protection projects have a common question: how much does it cost to purify biogas into natural gas? Can we make money? Today, let's not go around the bush and have a practical chat with everyone. In just one minute, we will help you calculate the cost of biogas purification. From the initial investment to the later operation, and then to the payback period, every transaction will be explained thoroughly, without any exaggeration or professional terminology. Even beginners can understand it at a glance and no longer have to worry about costs and benefits.

　　首先跟大家说清楚，沼气提纯成天然气的成本，主要分成两大块，缺一不可，大家千万别只算其中一块，不然很容易算错账、踩大坑——就是一次性投资成本，加上长期运行成本。这两块成本，直接决定了项目能不能赚钱、多久能回本，咱们一块一块慢慢唠。

　　First of all, let me make it clear to everyone that the cost of purifying biogas into natural gas is mainly divided into two parts, one of which is indispensable. Don't just count one part, otherwise it is easy to miscalculate and fall into a big trap - it is a one-time investment cost plus long-term operating costs. These two costs directly determine whether the project can make money and how long it will take to recoup. Let's talk slowly together.

　　第一部分，一次性设备投资成本。大家都知道，沼气提纯不是简单过滤一下就行，得有一套完整的设备，通常包括脱硫系统、提纯系统、脱水系统，还有一些辅助设备，这是前期投入的大头。咱们就以行业内常见的、每天处理1万方沼气的项目为例，给大家算一笔具体的账，这样更直观。

　　The first part is the investment cost of disposable equipment. As we all know, biogas purification is not just about filtering, it requires a complete set of equipment, usually including desulfurization system, purification system, dehydration system, and some auxiliary equipment, which is the main investment in the early stage. Let's take the common project in the industry that processes 10000 cubic meters of biogas per day as an example to give you a specific account, which is more intuitive.

　　其中，脱硫系统是基础，主要用来去除沼气中的硫化氢，避免腐蚀设备、影响提纯效果，这部分投资大概在100万左右；核心的提纯系统，用来脱除沼气中的二氧化碳等杂质，提升甲烷纯度，达到天然气标准，这部分成本稍高，大概在200万到360万之间（具体看提纯技术，膜分离或变压吸附工艺价格有差异）；再加上一些辅助设备，比如管道、控制系统等，大概20万左右。

　　Among them, the desulfurization system is the foundation, mainly used to remove hydrogen sulfide from biogas, avoid equipment corrosion, and affect purification efficiency. The investment for this part is about 1 million yuan; The core purification system is used to remove impurities such as carbon dioxide from biogas, improve methane purity, and meet natural gas standards. The cost of this part is slightly higher, ranging from 2 million to 3.6 million (depending on the purification technology, membrane separation or pressure swing adsorption process prices may vary); Plus some auxiliary equipment, such as pipelines, control systems, etc., it's about 200000 yuan.

　　这么算下来，一套每天处理1万方沼气的提纯设备，一次性投资大概在320万到480万之间。这里有个关键知识点跟大家说一下：气量越大，单位投资成本越低。比如每天处理2万方、5万方的项目，分摊到每一方沼气的设备成本，会比1万方的项目低不少，这就是规模效应，做项目的时候可以重点考虑。

　　Based on this calculation, a purification equipment that processes 10000 cubic meters of biogas per day requires a one-time investment of approximately 3.2 million to 4.8 million. Here is a key knowledge point to share with everyone: the larger the gas volume, the lower the unit investment cost. For example, processing projects of 20000 to 50000 cubic meters per day, the equipment cost allocated to each cubic meter of biogas will be much lower than that of projects of 10000 cubic meters. This is the scale effect, which can be a key consideration when working on projects.

　　第二部分，长期运行成本。这部分成本是很多朋友容易忽略的，但其实它才是决定项目长期收益的关键，毕竟设备买完之后，每天运行都要花钱。沼气提纯的运行成本，主要来自三个方面，咱们一个个算清楚，都是实打实的支出。

　　The second part is the long-term operating costs. This part of the cost is easily overlooked by many friends, but in fact, it is the key to determining the long-term benefits of the project, after all, after purchasing the equipment, it costs money to operate every day. The operating costs of biogas purification mainly come from three aspects, and we have calculated them one by one, all of which are actual expenses.

　　最主要的是电耗，提纯过程中，压缩机、脱碳系统等设备都需要用电，这部分成本大概在每方沼气0.18到0.35元之间；其次是耗材成本，比如脱硫剂、吸附剂等，每天都会有消耗，大概在每方沼气0.05到0.15元之间，具体看沼气的杂质含量；最后是人工和维护成本，需要专人看管设备、定期维护，避免设备出故障，这部分大概在每方沼气0.03到0.08元之间。

　　The most important factor is electricity consumption. During the purification process, equipment such as compressors and decarbonization systems require electricity, which costs approximately 0.18 to 0.35 yuan per cubic meter of biogas; Next is the cost of consumables, such as desulfurizers, adsorbents, etc., which are consumed daily, ranging from 0.05 to 0.15 yuan per cubic meter of biogas, depending on the impurity content of the biogas; Finally, there are labor and maintenance costs, which require dedicated personnel to monitor the equipment and conduct regular maintenance to avoid equipment malfunctions. This cost ranges from 0.03 to 0.08 yuan per cubic meter of biogas.

　　把这三部分加起来，沼气提纯的综合运行成本，大概在每方0.26到0.55元之间。这里跟大家补充一句，沼气提纯成天然气后，不是所有沼气都能转化成甲烷，折算下来，每立方沼气转化成甲烷的成本，大概在1.2到1.5元每立方米，这个数值是行业内的常规范围，大家可以作为参考。

　　Adding these three parts together, the comprehensive operating cost of biogas purification is approximately between 0.26 and 0.55 yuan per cubic meter. Here I would like to add that not all biogas can be converted into methane after being purified into natural gas. Converted, the cost of converting biogas into methane per cubic meter is approximately 1.2 to 1.5 yuan per cubic meter, which is a common range in the industry and can be used as a reference for everyone.

　　算完成本，大家最关心的肯定是：到底赚不赚钱？其实赚不赚钱，核心看回本周期，咱们结合一个实际案例，给大家算一笔收益账，一看就明白。就以日产1万方甲烷的项目为例，目前提纯后的生物甲烷，市场销售价格大概在2.0到2.5元每立方（不同地区、是否入网价格有差异）。

　　After calculating the cost, the most concerned thing for everyone is definitely: whether it's profitable or not? Actually, whether to make money or not depends on the current cycle. Let's combine a practical case and calculate a profit account for everyone. It's easy to understand at a glance. Taking the project of producing 10000 cubic meters of methane per day as an example, the market sales price of purified biomethane is approximately 2.0 to 2.5 yuan per cubic meter (depending on the region and whether it is connected to the network).

　　咱们按中间价算，每立方甲烷盈利大概在0.6到0.8元之间，一天下来，净利润大概在0.6到0.8万元。按照这个盈利水平，前期的设备投资，大概2到5年就能回本。当然，这只是常规情况，如果当地有可再生能源补贴、碳交易收益，回本周期还能缩短不少。

　　Based on the median price, the profit per cubic meter of methane is approximately between 0.6 and 0.8 yuan, resulting in a net profit of approximately 0.6 to 8000 yuan per day. At this profit level, the initial equipment investment can be recouped in approximately 2 to 5 years. Of course, this is just a routine situation. If there are subsidies for renewable energy and carbon trading profits locally, the payback period can be shortened significantly.

　　最后跟大家总结几个重点，都是干货，一定要记牢，避免踩坑。第一，沼气提纯，气量越大，回本越快，规模效应越明显，有条件的朋友可以考虑扩大处理规模；第二，连续运行最关键，设备不能三天打鱼两天晒网，只有持续稳定运行，才能保证稳定收益，降低单位运行成本；第三，千万别只算设备投资，忽略运行成本，很多朋友就是只算前期设备钱，觉得很划算，后期才发现运行成本居高不下，最后不赚钱。

　　Finally, I would like to summarize a few key points with everyone, all of which are valuable and must be memorized to avoid pitfalls. Firstly, for biogas purification, the larger the gas volume, the faster the cost recovery, and the more obvious the scale effect. Friends who have the conditions can consider expanding the processing scale; Secondly, continuous operation is the most crucial. The equipment cannot fish for three days and sun dry for two days. Only by continuous and stable operation can stable profits be guaranteed and unit operating costs be reduced; Thirdly, do not only calculate equipment investment and ignore operating costs. Many friends only calculate the initial equipment cost, thinking it is very cost-effective, but later realize that the operating costs remain high and do not make any money in the end.

　　还有一点要提醒大家，沼气提纯的成本，还会受沼气成分、提纯技术、当地电价等因素影响。比如沼气中硫化氢、二氧化碳含量高，耗材和电耗就会增加；采用膜分离技术，前期投资稍低，但后期膜组件需要定期更换；采用变压吸附技术，甲烷回收率更高，但电耗稍高，大家可以根据自己的情况选择。

　　Another point to remind everyone is that the cost of biogas purification is also affected by factors such as biogas composition, purification technology, and local electricity prices. For example, high levels of hydrogen sulfide and carbon dioxide in biogas will increase consumables and electricity consumption; Adopting membrane separation technology, the initial investment is slightly lower, but the membrane components need to be replaced regularly in the later stage; By using pressure swing adsorption technology, the methane recovery rate is higher, but the power consumption is slightly higher. Everyone can choose according to their own situation.

　　总的来说，沼气提纯成天然气，前期有一定的设备投资，但长期运行成本可控，只要做好规模规划、保证连续运行，还是有不错的收益的，而且还能实现环保减排，兼具经济效益和环境效益。

　　In general, the purification of biogas into natural gas requires a certain amount of equipment investment in the early stage, but the long-term operating costs are controllable. As long as the scale is well planned and continuous operation is ensured, there are still good benefits, and environmental protection and emission reduction can be achieved, with both economic and environmental benefits.

　　希望今天的分享，能帮到各位做沼气项目的朋友，彻底算清沼气提纯的成本账、收益账，再也不用为“要不要做、能不能赚钱”的事儿纠结。如果大家还有具体的项目规模、当地电价等细节，也可以私下交流，帮大家精准测算成本和回本周期，少走弯路、多赚钱。

　　I hope today's sharing can help friends who are doing biogas projects to thoroughly calculate the cost and profit of biogas purification, and no longer have to worry about whether to do it or make money. If you have specific details such as project scale and local electricity prices, you can also communicate privately to help you accurately calculate costs and payback periods, avoiding detours and making more money.