沼气脱硫器具技术成熟，运行可靠性高。操作弹性大，对煤种变化的适应性强。脱硫器工艺吸收效果好，吸收剂利用率高，设计脱硫率的实现；钠碱循环利用，损耗少，运行成本低；钠碱吸收剂反应活性高、吸收速度快，可采用低液气比，从而既可降低运行费用；脱硫渣，溶解度极小，无二次污染，可综合利用。如气体纯度要求更高可使用双塔。
The biogas desulfurization equipment has mature technology and high operation reliability. Large operation flexibility and strong adaptability to coal type change. Desulfurizer process has good absorption effect, high utilization rate of absorbent, and realization of designed desulfurization rate; Sodium and alkali are recycled, with less loss and low operation cost; The sodium-alkali absorbent has high reaction activity and fast absorption speed, and can adopt low liquid-gas ratio, which can reduce the operating cost; Desulfurized slag has low solubility, no secondary pollution and can be comprehensively utilized. If the gas purity requirement is higher, double towers can be used.
沼气脱硫方式工艺
Biogas desulfurization process
沼气在脱硫塔内流动的方向可分为两种。一种是沼气自下而动，为了防止冷凝水沉积在塔顶部而使脱硫剂受湿，通常可在顶部脱硫剂上铺一定厚度的碎硅酸铝纤维或其他多孔性填料，将冷凝水阻隔。另一种是气流自上而下流动，塔内产生的冷凝水都聚积在塔底部，可通过排污阀定期排除。脱硫塔底部应设置排污阀门和沼气安全泄压等装置。
The flow direction of biogas in the desulfurization tower can be divided into two types. One is that biogas moves from the bottom. In order to prevent condensate from depositing on the top of the tower and wetting the desulfurizer, a certain thickness of crushed aluminum silicate fiber or other porous filler can be paved on the top desulfurizer to block the condensate. The other is that the air flow flows from top to bottom, and the condensed water generated in the tower accumulates at the bottom of the tower, which can be regularly discharged through the blowdown valve. The bottom of desulfurization tower shall be equipped with blowdown valve and biogas safety pressure relief device.
氧化铁脱硫剂的更换时间应根据脱硫剂的活性和装填量、沼气中硫化氢含量和沼气处理量来确定。一旦脱硫剂失去活性，则需要将脱硫剂从塔内卸出，摊晒在空地上，用碱液或氨水将pH调整至8?9,利用空气中的氧，进行自然再生。大型沼气干法脱硫装置，应设置机械设备装卸脱硫剂。
The replacement time of iron oxide desulfurizer shall be determined according to the activity and loading capacity of desulfurizer, hydrogen sulfide content in biogas and biogas treatment capacity. Once the desulfurizer loses its activity, it is necessary to unload the desulfurizer from the tower, spread it on the open ground, and adjust the pH to 8? 9. Use the oxygen in the air for natural regeneration. Mechanical equipment shall be set for loading and unloading desulfurizer in large biogas dry desulfurization device.
湿法脱硫在大型的脱硫工程中，一般采用先用湿法进行粗脱硫，之后再通过干法进行精脱硫。沼气湿法脱硫可以归纳分为物理吸收法、化学吸收法和氧化法三种。物理和化学方法存在硫化氢再处理问题，氧化法是以碱性溶液为吸收剂，并加人载氧体为催化剂，吸收硫化氢，并将其氧化成单质硫。湿法氧化法是把脱硫剂溶解在水中，液体进入设备，与沼气混合，沼气中的硫化氢与液体产生氧化反应，生成单质硫。
In large desulfurization projects, wet desulfurization is generally used for coarse desulfurization, followed by dry desulfurization for fine desulfurization. The wet desulfurization of biogas can be divided into physical absorption method, chemical absorption method and oxidation method. There is a problem of hydrogen sulfide reprocessing in physical and chemical methods. The oxidation method uses alkaline solution as absorbent and human oxygen carrier as catalyst to absorb hydrogen sulfide and oxidize it into elemental sulfur. The wet oxidation method is to dissolve the desulfurizer in water, and the liquid enters the equipment and mixes with the biogas. The hydrogen sulfide in the biogas will react with the liquid to generate elemental sulfur.
生物脱硫沼气生物脱硫工艺是一种的沼气脱硫工艺，是在生物的作用下，将硫化氢氧化成单质硫的一种方法。生物脱硫方法主要是利用无色硫细菌，如氧化硫硫杆细菌、氧化亚铁硫杆细菌等，在微氧条件下将硫化氢氧化成单质硫，单质硫经过沉淀分离从而达到去除硫的目的。这种脱硫方法已经在德国沼气脱硫中广泛使用，在国内某些工程中已有采用。其优点是：不需要催化剂、不需要处理化学污泥，产生很少的生物污泥、能耗低、可回收_质硫、去除。
Biological desulfurization biogas biological desulfurization process is a kind of biogas desulfurization process. It is a method to oxidize hydrogen sulfide into elemental sulfur under the action of biology. The biological desulfurization method mainly uses colorless sulfur bacteria, such as sulfur oxide sulfur rod bacteria and ferrous oxide sulfur rod bacteria, to oxidize hydrogen sulfide into elemental sulfur under micro-oxygen conditions, and the elemental sulfur is precipitated and separated to achieve the purpose of sulfur removal. This desulfurization method has been widely used in biogas desulfurization in Germany and has been used in some domestic projects. Its advantages are: no catalyst, no chemical sludge treatment, little biological sludge, low energy consumption, recyclable_ Sulfur quality and removal.
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