生物+同步再生干法脱硫，破解污泥沼气高硫难题，去除率99%+

　　Biological+synchronous regeneration dry desulfurization solves the problem of high sulfur in sludge and biogas, with a removal rate of 99%+

　　厌氧消化是我国污泥处理处置的核心技术路线，在污泥降解过程中会伴随产生大量沼气，其甲烷含量达60%～70%，是极具价值的可再生能源。但污泥沼气中含有的硫化氢（H?S）成为其资源化利用的“致命阻碍”——H?S剧毒，空气中浓度达0.1%时可致人瞬间昏迷、脑死亡，且在潮湿环境下会强烈腐蚀管道和燃烧设备，燃烧后产生的SO?还会造成大气污染。我国污泥厌氧消化沼气中H?S含量多在300～9000mg/m?，个别案例高达30000mg/m?，远超《大中型沼气工程技术规范》规定的发电用H?S≤200mg/m?、民用供气≤20mg/m?的标准，脱硫处理成为沼气资源化利用的必由之路。

　　Anaerobic digestion is the core technology route for sludge treatment and disposal in China. During the sludge degradation process, a large amount of biogas is generated, with a methane content of 60% to 70%, which is a highly valuable renewable energy source. But the hydrogen sulfide (H2S) contained in sludge biogas has become a "fatal obstacle" to its resource utilization - H2S is highly toxic, and when the concentration in the air reaches 0.1%, it can cause instant coma and brain death. In humid environments, it can strongly corrode pipelines and combustion equipment, and the SO? Produced after combustion can also cause air pollution. The H-S content in anaerobic digestion biogas of sludge in China is mostly between 300-9000mg/m? Some cases reach up to 30000mg/m? , far exceeding the requirement of H-S ≤ 200mg/m for power generation specified in the Technical Specification for Large and Medium sized Biogas Engineering? Civil gas supply ≤ 20mg/m? According to the standard, desulfurization treatment has become a necessary path for the resource utilization of biogas.

　　传统沼气脱硫工艺存在诸多短板：干法脱硫硫容有限、再生风险高，不适用于大型污泥消化项目；湿法脱硫碱耗高（3～5kgNaOH/kgH?S）、易产生二次污染，难以达到排放标准。在此背景下，“生物+同步再生干法脱硫法”应运而生，融合生物脱硫与改良型干法脱硫的优势，成为大型市政污泥消化沼气脱硫的理想方案，既解决高硫浓度处理难题，又实现降本增效。

　　The traditional biogas desulfurization process has many shortcomings: dry desulfurization has limited sulfur capacity, high regeneration risk, and is not suitable for large-scale sludge digestion projects; Wet flue gas desulfurization has high alkali consumption (3-5 kg NaOH/kgH? S) and is prone to secondary pollution, making it difficult to meet emission standards. In this context, the "biological+synchronous regeneration dry desulfurization method" has emerged, integrating the advantages of biological desulfurization and improved dry desulfurization, becoming an ideal solution for large-scale municipal sludge digestion and biogas desulfurization. It not only solves the problem of high sulfur concentration treatment, but also achieves cost reduction and efficiency improvement.

　　该工艺以碱再生生物洗涤为核心一级脱硫，依托脱氮硫杆菌等化能自养型脱硫菌，将沼气中的H?S转化为单质硫，实现高效脱除与碱液再生。其核心优势在于环保经济，无需额外添加催化剂，碱耗仅0.63kgNaOH/kgH?S，远低于传统湿法脱硫，且可回收纯度95%以上的单质硫，实现资源循环。华东某大型污泥厌氧消化项目中，生物脱硫单元在进气H?S浓度4125～7425mg/m?的情况下，去除率稳定在99%以上，出气浓度平均仅11.72mg/m?，耐冲击负荷能力突出。

　　This process takes alkaline regeneration biological washing as the core for primary desulfurization, relying on autotrophic desulfurization bacteria such as denitrifying sulfur bacteria to convert H2S in biogas into elemental sulfur, achieving efficient removal and alkaline regeneration. Its core advantage lies in environmental protection and economy, without the need for additional catalysts, with a base consumption of only 0.63kgNaOH/kgH? S， Far lower than traditional wet desulfurization, and capable of recovering elemental sulfur with a purity of over 95%, achieving resource recycling. In a large-scale anaerobic digestion project for sludge in East China, the biological desulfurization unit has an inlet H2S concentration of 4125-7425mg/m? In this case, the removal rate remains stable at over 99%, and the average gas concentration is only 11.72mg/m? Outstanding ability to withstand impact loads.

　　同步再生干法脱硫作为二级精脱硫，完美解决了传统干法脱硫再生难、易自燃、脱硫剂板结的痛点。该工艺通过自控系统，根据沼气流量和H?S浓度自动变频投加空气（富余系数1.2～1.8），在脱除H?S的同时完成脱硫剂连续再生，采用隔离仓卸料设计杜绝空气带入引发自燃，搭配加热保温装置防止脱硫剂板结。工程实践表明，该单元可将生物脱硫后的沼气H?S浓度进一步降至1mg/m?以下，即便生物脱硫故障，进气浓度达300～500mg/m?，仍能保证出气≤20mg/m?，起到应急保障作用。

　　Synchronous regeneration dry desulfurization, as a secondary precision desulfurization, perfectly solves the pain points of difficult regeneration, easy self ignition, and desulfurizer agglomeration in traditional dry desulfurization. This process uses a self-control system to automatically add air (with a surplus factor of 1.2-1.8) according to the biogas flow rate and H2S concentration through frequency conversion. While removing H2S, it completes continuous regeneration of desulfurizer. It adopts an isolated bin discharge design to prevent air from entering and causing spontaneous combustion, and is equipped with a heating and insulation device to prevent desulfurizer from solidifying. Engineering practice has shown that this unit can further reduce the H2S concentration of biogas after biological desulfurization to 1mg/m? Even if biological desulfurization fails, can the intake concentration reach 300-500mg/m? Can we still ensure that the gas output is ≤ 20mg/m? Plays an emergency support role.

　　“生物+同步再生干法脱硫法”实现了优势互补：生物脱硫处理量大、运行成本低，同步再生干法脱硫反应快、净化度高，二者结合既适配大型污泥消化项目的高气量、高硫浓度需求，又能满足严格的环保标准。上述华东案例中，该脱硫系统处理成本仅0.101元/m?沼气，直接运行成本低至0.039元/m?，设备总投资约700万元，占地面积600㎡，脱硫剂日消耗量仅1～2kg，更换周期长达数年，经济效益显著。

　　The "biological+synchronous regeneration dry desulfurization method" has achieved complementary advantages: biological desulfurization has a large processing capacity and low operating costs, while synchronous regeneration dry desulfurization has fast reaction and high purification degree. The combination of the two is suitable for the high gas volume and high sulfur concentration requirements of large-scale sludge digestion projects, and can also meet strict environmental standards. In the above-mentioned East China case, the desulfurization system has a processing cost of only 0.101 yuan/m ? of biogas, with a direct operating cost as low as 0.039 yuan/m ?. The total equipment investment is about 7 million yuan, covering an area of 600 square meters. The daily consumption of desulfurizer is only 1-2 kg, and the replacement cycle takes several years, resulting in significant economic benefits.

　　随着污泥厌氧消化项目规模化推进，沼气资源化利用需求日益迫切，传统脱硫工艺已难以适配行业发展。生物+同步再生干法脱硫法凭借高效、经济、安全、环保的优势，破解了污泥沼气高硫处理瓶颈，既保障了沼气回收利用的安全性，又降低了运行成本，还实现了单质硫资源化回收，为大型市政污泥消化沼气脱硫提供了可复制、可推广的解决方案，助力沼气产业高质量发展与“双碳”目标落地。

　　With the large-scale promotion of sludge anaerobic digestion projects, the demand for biogas resource utilization is becoming increasingly urgent, and traditional desulfurization processes are no longer suitable for industry development. The biological+synchronous regeneration dry desulfurization method, with its advantages of high efficiency, economy, safety, and environmental protection, has solved the bottleneck of high sulfur treatment of sludge and biogas, ensuring the safety of biogas recycling and utilization, reducing operating costs, and realizing the resource recovery of elemental sulfur. It provides a replicable and promotable solution for large-scale municipal sludge digestion and biogas desulfurization, and helps the high-quality development of the biogas industry and the implementation of the "dual carbon" goal.

　　本文由 沼气脱硫 友情奉献.更多有关的知识请点击https://www.hneee.net/真诚的态度.为您提供为全面的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

　　This article is contributed by the friendship of biogas desulfurization For more related knowledge, please click https://www.hneee.net/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.