1. 沼气的来源
1. sources of Biogas
沼气通常来源于污水厌氧处理、粪便、秸秆发酵、石油天然气等，净化后的沼气可作为清洁能源，替代天然气、煤炭，用于发电、取暖、生产蒸汽等；分离出的硫化氢气体被转换成固态的生物硫磺，可作为化肥、化工等行业的原料。沼气经过吸收净化可资源利用，即实现了节能减排，也节约了企业的生产成本。
Biogas usually comes from anaerobic treatment of sewage, feces, straw fermentation, petroleum and natural gas, etc. The purified biogas can be used as clean energy, instead of natural gas and coal, for power generation, heating, steam production, etc. The separated hydrogen sulfide gas is converted into solid-state biosulfur, which can be used as fertilizer, chemical and other industries. Raw materials. Biogas can be utilized by absorption and purification, which not only realizes energy saving and emission reduction, but also saves the production cost of enterprises.
2. 沼气的价值
2. biogas value
1m3沼气≈0.65m3天然气≈0.7kg标准煤≈ 7.5kg 蒸汽≈1.8kwh电，按照工业天然气3.0元/立方米计算，利用1立方沼气可节约1.95元。
1 m3 biogas 0.65 m3 natural gas 0.7 kg standard coal 7.5 kg steam 1.8 kwh electricity, according to industrial natural gas 3.0 yuan / cubic meter calculation, using 1 cubic methane can save 1.95 yuan.
2. 沼气脱硫和烟气脱硫的区别
2. the difference between biogas desulfurization and flue gas desulfurization.
沼气脱硫和烟气脱硫虽然都是脱硫，但确是完全不同的两种工艺。烟气脱硫是从工业废气中脱除二氧化硫SO2和SO3。我们常说的脱硫脱硝，就指的是脱除二氧化硫。而沼气脱硫是指从沼气中脱除硫化氢(H2S)，以减少对后续管道、燃烧锅炉或发电机的腐蚀。
Biogas desulfurization and flue gas desulphurization are all desulphurization technologies, but they are two different processes. Flue gas desulfurization is the removal of sulfur dioxide SO2 and SO3 from industrial waste gas. We often say that desulfurization and denitrification means removal of sulphur dioxide. Biogas desulfurization refers to the removal of hydrogen sulfide (H2S) from biogas to reduce corrosion of subsequent pipelines, combustion boilers or generators.
3. 什么是沼气生物脱硫？
3. what is biogas desulfurization?
沼气生物脱硫（简称沼气脱硫）是利用生物菌种去除沼气中腐蚀性强、毒性强的硫化氢气体的一种工艺方法，这个工艺具有自动化程度高，流程简洁，运行成本低等优点。
Biogas desulfurization is a process to remove corrosive and toxic hydrogen sulfide gas from biogas by using biological bacteria. This process has the advantages of high automation, simple process and low operation cost.
3. 工艺原理厌氧发酵产生的沼气进入洗涤塔，通过与碱性循环喷淋液发生吸收反应，从而去除沼气中的硫化氢。吸收硫化氢的富液回流至生物反应器内，通过生物转化，将硫化氢转化成固态单质硫磺，并将溶液再生为可用于洗涤沼气的碱性吸收液（亦成为贫液），从而实现了吸收剂的回收和再生循环利用。通过硫沉淀器实现硫磺固体的分离。
3. The biogas produced by anaerobic fermentation goes into the scrubbing tower and absorbs the alkaline circulating spray to remove hydrogen sulfide from the biogas. The rich liquid absorbed by hydrogen sulfide is refluxed into a bioreactor, and then converted into solid sulfur by biotransformation, and the solution is regenerated into an alkaline absorbent (also a lean solution) which can be used to wash methane, thus realizing the recovery and recycling of absorbent. Sulphur solid separation is achieved by sulfur precipitator.
此工艺将弱碱性条件下硫化氢的物理化学吸收与空气作用下碱性溶液的生物再生相结合。含有硫化氢的沼气进入洗涤塔，在这里被吸收硫化氢的碱溶液洗涤，处理后的沼气硫化氢去除率高达99.5%。经系统处理后，沼气可用于燃气发电机发电，用作锅炉燃料或输入至当地小型供气网络。
The process combines the physical and chemical absorption of hydrogen sulfide under weak alkaline condition with the biological regeneration of alkaline solution under the action of air. The methane containing hydrogen sulfide enters the scrubbing tower, where it is washed by the alkali solution which absorbs hydrogen sulfide. The removal rate of hydrogen sulfide from the treated methane is as high as 99.5%. After system treatment, biogas can be used to generate electricity from gas-fired generators for use as boiler fuel or input to local small-scale gas supply network.
几乎不含硫化氢的沼气从洗涤塔顶部逸出，含硫化氢的溶液流入生物反应器，在此细菌在限制供氧条件下将其氧化为单质硫和碱。该系统的少量排出液（含钠盐）和副产品硫磺中都不含硫化物，排放没有问题。
Biogas with almost no hydrogen sulfide escapes from the top of the scrubber and the solution containing hydrogen sulfide flows into the bioreactor, where the bacteria oxidize it to sulfur and alkali under limited oxygen supply. A small amount of effluent (containing sodium salt) and by-product sulphur in the system do not contain sulphide, discharge is not a problem.
4. 生物脱硫的技术优势
4. technical advantages of bio desulfurization
- 全自动无人值守，高度稳定可靠。
- fully automatic, unattended, highly stable and reliable.
- 深度的硫化氢去除（出口硫化氢含量50-100ppm）
- depth of hydrogen sulfide removal (export hydrogen sulfide content 50-100ppm)
- 可耐受气体流量和硫负荷较宽范围的波动
- tolerable fluctuations in gas flow and sulfur load over a wide range.
- 沼气不会被空气稀释：沼气和空气之间有严格的物理分离
Biogas is not diluted by air: there is a strict physical separation between methane and air.
- 只需少量的碱、水和营养物
- only a small amount of alkali, water and nutrients are needed.
- 没有堵塞和污垢的风险，因此维护工作量少
- there is no risk of clogging and fouling, so there is little maintenance effort.
- 常温常压运行
- normal temperature and atmospheric pressure operation
- 产生单质硫：可作为肥料和杀虫剂
Producing elemental sulfur: it can be used as fertilizer and insecticide.
5. 应用的领域
5. areas of application
沼气生物脱硫技术应用的领域非常广泛。污水厌氧处理、粪便、秸秆发酵、石油天然气产生的沼气硫化氢含量过高，都可以应用。
Biogas biological desulfurization technology is widely applied in many fields. Anaerobic treatment of sewage, feces, straw fermentation, petroleum and natural gas produced by methane hydrogen sulfide content is too high, can be applied.