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　　生物脱硫：同样是湿法衍生技术，为何有的无需浆液池？

　　Biological desulfurization: why do some wet derived technologies not require a slurry tank?

　　很多接触过湿法脱硫的人都会有这样的疑问：同样是湿法体系，锅炉房脱硫塔旁边，有的配有专门的浆液池，有的却没有踪迹。其实这一差异，核心在于湿法脱硫的循环方式不同——塔内循环无需浆液池，塔外循环则必须配套浆液池，而生物脱硫作为湿法脱硫的重要衍生技术，同样存在类似的差异的，却又有着自身独特的技术逻辑。不同于传统湿法脱硫的酸碱中和，生物脱硫依托微生物的代谢作用去除硫化物，既保留了湿法脱硫的高效性，又解决了传统湿法二次污染的痛点，而其是否需要配套浆液池，也与自身的工艺类型密切相关，今天就详细拆解生物脱硫的核心技术、工艺差异，解答“为何有的无需浆液池”的疑问，带大家读懂生物脱硫的独特优势与实操逻辑。

　　Many people who have been exposed to wet desulfurization have this question: for the same wet system, some are equipped with dedicated slurry tanks next to the desulfurization tower in the boiler room, while others have no trace. In fact, the core of this difference lies in the different circulation methods of wet desulfurization - the internal circulation does not require a slurry pool, while the external circulation must be matched with a slurry pool. As an important derivative technology of wet desulfurization, biological desulfurization also has similar differences but its own unique technical logic. Unlike the acid-base neutralization of traditional wet flue gas desulfurization, biological desulfurization relies on the metabolic action of microorganisms to remove sulfides, which not only retains the high efficiency of wet flue gas desulfurization, but also solves the pain point of secondary pollution in traditional wet flue gas desulfurization. Whether it needs to be matched with a slurry tank is closely related to its own process type. Today, we will break down the core technology and process differences of biological desulfurization in detail, answer the question of "why some do not require a slurry tank", and take you to understand the unique advantages and practical logic of biological desulfurization.

　　首先要明确，生物脱硫的核心原理，与传统湿法脱硫的酸碱中和有着本质区别。它是利用特定微生物（如脱硫杆菌、硫氧化菌）的代谢活动，将废气中的硫化物（如硫化氢）转化为无害的硫单质或硫酸盐，整个过程无需添加大量碱性脱硫剂，更环保、更节能，也是目前备受推崇的绿色脱硫技术。而生物脱硫作为湿法脱硫的衍生技术，同样分为两种核心工艺类型，这也是其是否需要配套浆液池的关键所在。

　　Firstly, it should be clarified that the core principle of biological desulfurization is fundamentally different from the acid-base neutralization of traditional wet desulfurization. It utilizes the metabolic activity of specific microorganisms (such as desulfurizing bacteria and sulfur oxidizing bacteria) to convert sulfides (such as hydrogen sulfide) in exhaust gas into harmless elemental sulfur or sulfate. The entire process does not require the addition of a large amount of alkaline desulfurizer, making it more environmentally friendly and energy-saving. It is also currently highly regarded as a green desulfurization technology. As a derivative technology of wet desulfurization, biological desulfurization can also be divided into two core process types, which is the key to whether it needs to be matched with a slurry tank.

　　生物脱硫的第一种工艺的是生物膜法脱硫，这种工艺无需配套浆液池，类似于湿法脱硫中的塔内循环模式。其核心逻辑是将脱硫微生物固定在脱硫塔内的填料表面，形成一层致密的生物膜，废气（如沼气、工业尾气）从塔底进入，与塔内喷淋的营养液充分接触，硫化物被生物膜上的微生物捕获、代谢，实现脱硫目的。整个过程中，营养液在塔内循环使用，无需引出塔外，因此不需要额外建设浆液池。

　　The first process of biological desulfurization is biofilm desulfurization, which does not require a matching slurry tank and is similar to the tower circulation mode in wet desulfurization. The core logic is to fix desulfurization microorganisms on the surface of the packing in the desulfurization tower, forming a dense biofilm. Waste gas (such as biogas and industrial exhaust gas) enters from the bottom of the tower and fully contacts with the nutrient solution sprayed inside the tower. Sulfides are captured and metabolized by microorganisms on the biofilm, achieving the purpose of desulfurization. Throughout the entire process, the nutrient solution is circulated inside the tower without the need to be drawn out, so there is no need to construct an additional slurry tank.

　　这种无浆液池的生物膜法脱硫，优势十分突出。一方面，它占地空间小，无需额外规划浆液池的用地，尤其适合场地有限的公司；另一方面，营养液循环封闭进行，水质不易受到外界污染，运行稳定性强，设备损耗小、使用寿命长，同时节省了浆液储存、输送的相关成本。但它也存在一定的局限性，与塔内循环类似，由于营养液和生物膜均在塔内，无法实现在线维护，一旦设备出现故障或需要更换填料、检修微生物，就必须停机操作，会在一定程度上影响生产进度。

　　This biofilm desulfurization method without slurry pool has outstanding advantages. On the one hand, it occupies a small space and does not require additional planning of the land for the slurry tank, especially suitable for enterprises with limited space; On the other hand, the nutrient solution is circulated in a closed manner, which makes the water quality less susceptible to external pollution, has strong operational stability, low equipment loss, long service life, and saves the related costs of slurry storage and transportation. But it also has certain limitations, similar to the circulation inside the tower. Due to the presence of nutrient solution and biofilm inside the tower, online maintenance cannot be achieved. Once the equipment malfunctions or requires replacement of packing or maintenance of microorganisms, it must be shut down, which will affect the production progress to a certain extent.

　　这里补充一个专业知识点：生物膜法脱硫中，微生物的活性是核心，营养液的配比需精准控制，确保微生物的代谢需求，同时要定期监测生物膜的厚度和活性，避免生物膜脱落影响脱硫效率。这种工艺适合硫化物浓度适中、场地有限、对连续运行要求不极致的场景，如小型沼气利用项目、中小型工业尾气处理等。

　　Here is an additional professional knowledge point: in biofilm desulfurization, the activity of microorganisms is the core, and the ratio of nutrient solution needs to be precisely controlled to ensure the metabolic needs of microorganisms. At the same time, the thickness and activity of the biofilm should be regularly monitored to avoid biofilm detachment affecting desulfurization efficiency. This process is suitable for scenarios where the concentration of sulfides is moderate, the site is limited, and the requirements for continuous operation are not extreme, such as small-scale biogas utilization projects, small and medium-sized industrial exhaust gas treatment, etc.

　　生物脱硫的第二种工艺是悬浮生长法脱硫，这种工艺则需要配套专门的浆液池，类似于湿法脱硫中的塔外循环模式。其核心逻辑是将脱硫微生物悬浮在脱硫浆液中，浆液储存在专门的浆液池内，通过循环泵将含微生物的浆液打入脱硫塔内的喷淋层，与废气充分接触，微生物代谢去除硫化物后，浆液再流回浆液池循环使用，形成完整的循环体系。

　　The second process of biological desulfurization is suspension growth desulfurization, which requires a dedicated slurry tank, similar to the tower external circulation mode in wet desulfurization. The core logic is to suspend desulfurization microorganisms in desulfurization slurry, store the slurry in a dedicated slurry pool, and inject the slurry containing microorganisms into the spray layer of the desulfurization tower through a circulation pump, fully contacting with the exhaust gas. After the microorganisms metabolize and remove sulfides, the slurry flows back to the slurry pool for recycling, forming a complete circulation system.

　　配套浆液池的悬浮生长法脱硫，最大的优势就是清渣方便、可在线维护。脱硫过程中产生的硫单质等产物会沉淀在浆液池底部，无需停机，即可通过浆液池的排渣装置进行清理，避免产物堆积影响脱硫效率；同时，若需要补充微生物、调整营养液配比，或检修循环系统，均可在不停机的情况下完成，不会影响生产的连续性。但它也存在明显的短板，占地面积较大，需要额外建设浆液池，且浆液在循环过程中容易受到外界污染，需要加强水质监测和维护，运行成本相对更高。

　　The biggest advantage of the suspended growth desulfurization method with a matching slurry pool is its convenient slag removal and online maintenance. The sulfur and other products generated during the desulfurization process will settle at the bottom of the slurry pool, and can be cleaned through the slag discharge device of the slurry pool without stopping the machine to avoid the accumulation of products affecting the desulfurization efficiency; At the same time, if it is necessary to supplement microorganisms, adjust nutrient solution ratios, or overhaul the circulation system, it can be completed without stopping the machine, without affecting the continuity of production. But it also has obvious shortcomings, occupying a large area and requiring the construction of additional slurry tanks. Moreover, the slurry is easily contaminated by external factors during the circulation process, requiring strengthened water quality monitoring and maintenance, resulting in relatively higher operating costs.

　　很多人会疑惑，同样是生物脱硫，为何要分为有浆液池和无浆液池两种工艺？其实核心是适配不同的使用场景和需求。对于场地紧张、追求低成本、对停机维护接受度较高的公司，无浆液池的生物膜法脱硫是更优选择；而对于生产连续性要求高、硫化物浓度较高、需要频繁清渣的公司，配套浆液池的悬浮生长法脱硫则更贴合需求。这与传统湿法脱硫中塔内、塔外循环的选择逻辑一致，都是基于实际场景的个性化适配。

　　Many people may wonder why there are two types of processes for biological desulfurization: those with slurry tanks and those without slurry tanks? In fact, the core is to adapt to different usage scenarios and requirements. For enterprises with limited space, pursuit of low cost, and high acceptance of downtime maintenance, biofilm desulfurization without slurry pool is a better choice; For enterprises that require high production continuity, high sulfide concentration, and frequent slag cleaning, the suspended growth desulfurization method with a matching slurry pool is more in line with their needs. This is consistent with the selection logic of internal and external circulation in traditional wet flue gas desulfurization, which is based on personalized adaptation to actual scenarios.

　　相较于传统湿法脱硫，生物脱硫的两大工艺无论是否需要浆液池，都有着显着的优势。它无需大量使用碱性脱硫剂，减少了脱硫剂的浪费和副产物的产生，从根源上降低了二次污染的风险；同时，微生物代谢过程温和，对设备的腐蚀性小，能有效延长设备使用寿命，长期运行成本更低。此外，生物脱硫的脱硫效率高，能精准去除废气中的硫化物，满足严格的环保排放要求，适配多种废气处理场景。

　　Compared to traditional wet desulfurization, the two major processes of biological desulfurization have significant advantages regardless of whether a slurry tank is required. It does not require a large amount of alkaline desulfurizer, reducing the waste of desulfurizer and the generation of by-products, and fundamentally reducing the risk of secondary pollution; At the same time, the microbial metabolism process is mild, with low corrosiveness to equipment, which can effectively extend the service life of equipment and lower long-term operating costs. In addition, biological desulfurization has high desulfurization efficiency and can accurately remove sulfides from exhaust gas, meeting strict environmental emission requirements and adapting to various exhaust gas treatment scenarios.

　　值得注意的是，无论是有浆液池还是无浆液池的生物脱硫工艺，都需要注重微生物的养护和工艺参数的控制。微生物的活性直接决定脱硫效率，因此需要定期监测营养液的辫贬值、温度、溶解氧等参数，确保微生物处于最佳代谢状态；对于有浆液池的工艺，还需要定期清理浆液池内的沉淀物，防止管道堵塞、影响循环效率；无浆液池的工艺，则需要定期检查生物膜的状态，及时补充微生物或更换填料。

　　It is worth noting that both biological desulfurization processes with and without slurry tanks require attention to the maintenance of microorganisms and control of process parameters. The activity of microorganisms directly determines the desulfurization efficiency, so it is necessary to regularly monitor the pH value, temperature, dissolved oxygen and other parameters of the nutrient solution to ensure that microorganisms are in the optimal metabolic state; For processes with slurry tanks, it is necessary to regularly clean the sediment in the tank to prevent pipeline blockage and affect circulation efficiency; The process without a slurry tank requires regular inspection of the status of the biofilm, timely replenishment of microorganisms or replacement of fillers.

　　总结来说，生物脱硫作为湿法脱硫的绿色衍生技术，其是否需要配套浆液池，取决于自身的工艺类型——生物膜法无需浆液池，占地小、成本低但需停机维护；悬浮生长法需配套浆液池，可在线维护、清渣方便但占地较大。两种工艺各有优劣，核心是适配不同公司的场地条件、生产需求和环保要求。不同于传统湿法脱硫的酸碱中和，生物脱硫依托微生物代谢实现绿色脱硫，既解决了传统脱硫的环保痛点，又通过两种工艺的差异化设计，满足了不同场景的使用需求，成为当下环保脱硫领域的优选技术之一。

　　In summary, as a green derivative technology of wet flue gas desulfurization, whether biological desulfurization requires a slurry tank depends on its own process type - biofilm method does not require a slurry tank, occupies a small area, has low cost but requires shutdown maintenance; The suspended growth method requires a slurry tank, which can be maintained online and has convenient slag cleaning, but it occupies a large area. Both processes have their own advantages and disadvantages, and the core is to adapt to the site conditions, production needs, and environmental protection requirements of different enterprises. Unlike the acid-base neutralization of traditional wet desulfurization, biological desulfurization relies on microbial metabolism to achieve green desulfurization, which not only solves the environmental pain points of traditional desulfurization, but also meets the usage needs of different scenarios through the differentiated design of the two processes, becoming one of the preferred technologies in the current field of environmental desulfurization.