對于廢氣治理達標(biāo)排放，企業(yè)該如何選用末端治理？末端治理即建設(shè)高效治理設(shè)施，推進污染設(shè)施升級改造，實行重點排放源排放濃度與去除效率雙重控制。

　　How should companies choose end-point treatment for meeting emission standards in exhaust gas treatment? End of pipe treatment refers to the construction of efficient treatment facilities, the promotion of pollution facility upgrading and transformation, and the implementation of dual control of emission concentration and removal efficiency from key emission sources.

　　一般優(yōu)先選用回收技術(shù)，可通過冷凝、吸附再生等處理，進行回收利用；難以回收的，可采用燃燒、吸附濃縮+燃燒等技術(shù)進行銷毀。

　　Generally, recycling technology is preferred, which can be treated through condensation, adsorption regeneration, etc. for recycling and utilization; Difficult to recycle, combustion, adsorption concentration+combustion and other technologies can be used for destruction.

　　常用 VOCs 末端治理技術(shù)

　　Common VOCs End of pipe Treatment Technologies

　　企業(yè)在進行技術(shù)選擇時，應(yīng)結(jié)合排放廢氣的濃度、組分、風(fēng)量、溫度、濕度、壓力以及生產(chǎn)工況等，合理選擇VOCs末端治理技術(shù)。實際應(yīng)用中，企業(yè)一般采用多種技術(shù)的組合工藝，提高VOCs治理效率。

　　When enterprises make technology choices, they should consider the concentration, composition, air volume, temperature, humidity, pressure, and production conditions of the emitted exhaust gas, and reasonably choose VOCs end of pipe treatment technologies. In practical applications, enterprises generally adopt a combination of multiple technologies to improve the efficiency of VOCs treatment.

　　“對低濃度、大風(fēng)量廢氣，宜采用活性炭吸附、沸石轉(zhuǎn)輪吸附、減風(fēng)增濃等濃縮技術(shù)，提高VOCs 濃度后凈化處理；

　　For low concentration and high air volume exhaust gases, it is advisable to use concentration technologies such as activated carbon adsorption, zeolite rotary adsorption, and wind reduction and concentration enhancement to purify and treat VOCs after increasing their concentration;

　　對高濃度廢氣，優(yōu)先進行溶劑回收，難以回收的，宜采用高溫焚燒、催化燃燒等技術(shù)。

　　For high concentration exhaust gases, solvent recovery should be prioritized. For those that are difficult to recover, high-temperature incineration, catalytic combustion, and other technologies should be used.

　　油氣（溶劑）回收宜采用冷凝+吸附、吸附+吸收、膜分離+吸附等技術(shù)。

　　Oil and gas (solvent) recovery should adopt technologies such as condensation+adsorption, adsorption+absorption, membrane separation+adsorption, etc.

　　水溶性、酸堿 VOCs 廢氣一般選用多級化學(xué)吸收等處理技術(shù)，惡臭類廢氣還應(yīng)進一步加強除臭處理。

　　Water soluble and acid-base VOCs waste gases are generally treated using multi-stage chemical absorption techniques, while odorous waste gases should further strengthen deodorization treatment.

　　低溫等離子、光催化、光氧化技術(shù)主要適用于惡臭異味等治理；

　　Low temperature plasma, photocatalysis, and photocatalytic oxidation technologies are mainly suitable for the treatment of odors and odors;

　　生物法主要適用于低濃度 VOCs 廢氣治理和惡臭異味治理。

　　Biological methods are mainly applicable for the treatment of low concentration VOCs waste gas and the treatment of odors and unpleasant odors.

　　采用一次性活性炭吸附技術(shù)的，應(yīng)定期更換活性炭，廢舊活性炭應(yīng)再生或處理處置。

　　For those who use disposable activated carbon adsorption technology, the activated carbon should be replaced regularly, and waste activated carbon should be regenerated or disposed of.

　　幾種典型 VOCs 組合處理技術(shù)介紹

　　Introduction to several typical VOCs combination treatment technologies

　?。?）VOCs循環(huán)脫附分流回收吸附技術(shù)該技術(shù)

　　(1) VOCs cycle desorption diversion recovery adsorption technology

　　采用活性炭作為吸附劑，采用惰性氣體循環(huán)加熱脫附分流冷凝回收的工藝對有機氣體進行凈化和回收。回收液通過后續(xù)的精制工藝可實現(xiàn)有機物的循環(huán)利用。工藝原理示意圖如下：

　　The purification and recovery of organic gases are carried out using activated carbon as an adsorbent and an inert gas cycle heating desorption split flow condensation recovery process. The recycled liquid can achieve the recycling of organic matter through subsequent refining processes. The schematic diagram of the process principle is as follows:

　　VOCs 循環(huán)脫附分流回收吸附工藝原理示意圖

　　Schematic diagram of VOCs cycle desorption, diversion recovery and adsorption process principle

　　整個系統(tǒng)由來氣預(yù)處理、吸附、循環(huán)加熱脫附、冷凝回收和自動控制等主要部分構(gòu)成。含VOCs的氣體通過預(yù)處理后進入吸附段吸附后達標(biāo)排放，吸附段通常并聯(lián)設(shè)置有吸附罐并通過切換閥控制實現(xiàn)氣體的連續(xù)吸附操作。吸附到設(shè)定程度的吸附罐通過切換閥切換形成再生循環(huán)回路。循環(huán)回路可通過充入惰性氣體置換系統(tǒng)內(nèi)氣體的方式減少氣相中的含氧量，從而減少再生過程中某些類型溶劑的氧化副產(chǎn)物的生成。通過循環(huán)風(fēng)機和加熱器可形成循環(huán)氣流加熱吸附罐進行脫附，同時通過分流冷凝系統(tǒng)冷凝回收溶劑。

　　The entire system consists of main components such as gas pretreatment, adsorption, cyclic heating desorption, condensation recovery, and automatic control. After pre-treatment, gases containing VOCs enter the adsorption section for adsorption and meet emission standards. The adsorption section is usually equipped with adsorption tanks in parallel and controlled by a switching valve to achieve continuous gas adsorption operation. The adsorption tank, which has reached the set level of adsorption, forms a regeneration cycle circuit by switching the valve. The circulation loop can reduce the oxygen content in the gas phase by injecting inert gas to replace the gas in the system, thereby reducing the generation of oxidation by-products of certain types of solvents during the regeneration process. A circulating airflow can be formed through a circulating fan and heater to heat the adsorption tank for desorption, while the solvent is condensed and recovered through a split flow condensation system.

　　目前該技術(shù)成熟、穩(wěn)定，可實現(xiàn)自動化運行。單位投資大致為9-24萬元/千（m3/h），回收的有機物成本700-3000元/t。對有機氣體成分的凈化回收效率一般大于90%，也可達95%以上。適用于石油，化工及制藥工業(yè)，涂裝、印刷、涂布，漆包線、金屬及薄膜除油，食品，煙草，種子油萃取工業(yè)，及其他使用有機溶劑或C4-C12 石油烴的工藝過程。

　　At present, the technology is mature and stable, and can achieve automated operation. The unit investment is roughly 90000 to 240000 yuan per thousand (m3/h), and the cost of recovering organic matter is 700-3000 yuan per ton. The purification and recovery efficiency of organic gas components is generally greater than 90%, and can also reach over 95%. Suitable for the petroleum, chemical, and pharmaceutical industries, painting, printing, coating, enameled wire, metal and film degreasing, food, tobacco, seed oil extraction industries, and other processes that use organic solvents or C4-C12 petroleum hydrocarbons.

　?。?）高效吸附-脫附-燃燒 VOCs 治理技術(shù)

　　(2) Efficient adsorption desorption combustion VOCs treatment technology

　　該技術(shù)利用高吸附性能的活性碳纖維、顆粒炭、蜂窩炭和耐高溫高濕整體式分子篩等固體吸附材料對工業(yè)廢氣中的 VOCs 進行富集，對吸附飽和的材料進行強化脫附工藝處理，脫附出的VOCs 進入高效催化材料床層進行催化燃燒或蓄熱催化燃燒工藝處理，進而降解 VOCs。

　　This technology utilizes solid adsorption materials such as activated carbon fiber, granular carbon, honeycomb carbon, and high-temperature and high humidity resistant integral molecular sieve with high adsorption performance to enrich VOCs in industrial waste gas. The saturated adsorption materials are subjected to enhanced desorption process treatment, and the desorbed VOCs enter the high-efficiency catalytic material bed for catalytic combustion or thermal storage catalytic combustion process treatment, thereby degrading VOCs.

　　主要工藝流程包括預(yù)處理、吸附、脫附-燃燒三個階段。

　　The main process flow includes three stages: pretreatment, adsorption, desorption combustion.

　　①預(yù)處理：含 VOCs 廢氣在吸附凈化前一般先經(jīng)高效纖維過濾器或高效干濕復(fù)合過濾器過濾，對廢氣粉塵等進行攔截凈化。

　?、?Pre treatment: VOCs containing waste gas is generally filtered through high-efficiency fiber filters or high-efficiency wet dry composite filters before adsorption purification, to intercept and purify waste gas dust and other pollutants.

　　②吸附階段：去除塵雜后的廢氣，經(jīng)合理布風(fēng)，使其均勻地通過固定吸附床內(nèi)的吸附材料層過流斷面，在一定停留時間內(nèi)，由于吸附材料表面與有機廢氣分子間相互作用發(fā)生物理吸附，廢氣中的有機成份吸附在活性炭表面積，使廢氣得到凈化；實際應(yīng)用中，凈化裝置一般設(shè)置兩臺以上吸附床，以確保一臺處于脫附再生或備用，保證吸附過程連續(xù)性，不影響實際生產(chǎn)。

　?、?Adsorption stage: After removing dust and impurities, the exhaust gas is evenly distributed through the flow cross-section of the adsorption material layer in the fixed adsorption bed through reasonable air distribution. Within a certain residence time, physical adsorption occurs due to the interaction between the adsorption material surface and the organic waste gas molecules. The organic components in the exhaust gas are adsorbed on the surface area of the activated carbon, purifying the exhaust gas; In practical applications, purification devices are generally equipped with two or more adsorption beds to ensure that one is in desorption regeneration or standby mode, ensuring the continuity of the adsorption process and not affecting actual production.

　　③脫附-燃燒：達到飽和狀態(tài)的吸附床應(yīng)停止吸附轉(zhuǎn)入脫附再生，脫附后的廢氣進入燃燒階段，即 RTO或 RCO廢氣處理工藝。

　?、?Desorption combustion: When the adsorption bed reaches saturation, it should stop adsorption and switch to desorption regeneration. The desorbed exhaust gas enters the combustion stage, which is the RTO or RCO exhaust gas treatment process.

　　RCO 廢氣處理工藝原理示意圖

　　Schematic diagram of RCO waste gas treatment process principle

　　催化燃燒技術(shù)（RCO）是利用催化劑做中間體，使有機氣體在較低的溫度下，變成無害的水和二氧化碳氣體，即：

　　Catalytic combustion technology (RCO) uses catalysts as intermediates to transform organic gases into harmless water and carbon dioxide gases at lower temperatures, namely:

　　兩種燃燒技術(shù)的去除率、達標(biāo)能力是一致的，但也存在一些不同，見下表。

　　The removal rate and compliance ability of the two combustion technologies are consistent, but there are also some differences, as shown in the table below.

　　總的來說，RTO技術(shù)會產(chǎn)生二次污染，同時存在投資大、運行費用高、風(fēng)險高等問題。RCO技術(shù)具有明顯優(yōu)勢。

　　Overall, RTO technology generates secondary pollution, while also facing issues such as high investment, high operating costs, and high risks. RCO technology has significant advantages.

　　目前該技術(shù)成熟、穩(wěn)定，可實現(xiàn)自動化運行。設(shè)備投資基本上是200~300萬元（以處理風(fēng)量為50000m3/h），運行費用30~50萬元，主體設(shè)備壽命10~15年。VOCs去除效率一般大于95%，可達98%以上。在石油、化工、電子、機械、涂裝等行業(yè)大風(fēng)量、低濃度或濃度不穩(wěn)定的有機廢氣治理中得到應(yīng)用。

　　At present, the technology is mature and stable, and can achieve automated operation. The equipment investment is basically 2 to 3 million yuan (with a processing air volume of 50000 m3/h), the operating cost is 300000 to 500000 yuan, and the service life of the main equipment is 10 to 15 years. The removal efficiency of VOCs is generally greater than 95%, and can reach over 98%. It has been applied in the treatment of organic waste gases with high air volume, low concentration, or unstable concentration in industries such as petroleum, chemical, electronics, machinery, and painting.

　?。?）冷凝與變壓吸附聯(lián)用 VOCs治理技術(shù)

　　(3) Condensation and pressure swing adsorption combined VOCs treatment technology

　　該技術(shù)采用多級冷凝技術(shù)，使廢氣的有機成分在常壓下凝結(jié)成液體析出，經(jīng)凈化后的廢氣進入吸附器進一步吸附富集，同時確保達標(biāo)排放。吸附飽和后的吸附劑（活性炭、沸石等）等采用負壓脫附方式再生吸附劑，并將高濃度 VOCs 送回前端冷凝裝置。

　　This technology adopts multi-stage condensation technology to condense the organic components of the exhaust gas into liquid under normal pressure, and the purified exhaust gas enters the adsorber for further adsorption and enrichment, while ensuring compliance with emission standards. After adsorption saturation, adsorbents such as activated carbon and zeolite are regenerated using negative pressure desorption, and high concentration VOCs are sent back to the front-end condensation device.

　　冷凝與變壓吸附工藝原理示意圖

　　Schematic diagram of condensation and pressure swing adsorption process principle

　　工藝流程主要包括冷凝和吸附兩大單元。冷凝單元一般設(shè)置三級冷凝，第一級從常溫冷凝到3℃、第二級從3℃冷凝到-35℃、第三級從-35℃冷凝到-70℃。第三級的冷凝余氣返回第一級前面的前置換熱器，冷量回用，將進入回收處理裝置的含VOCs廢氣預(yù)冷，有節(jié)能效果。吸附單元一般配置吸附罐兩只和脫附真空泵一臺，以及用于切換吸附脫附的電動或氣動閥門若干。真空泵還需要配備冷卻系統(tǒng)。

　　The process flow mainly includes two major units: condensation and adsorption. The condensation unit is generally equipped with three-stage condensation, with the first stage condensing from room temperature to 3 ℃, the second stage condensing from 3 ℃ to -35 ℃, and the third stage condensing from -35 ℃ to -70 ℃. The condensed residual gas from the third stage is returned to the pre heat exchanger in front of the first stage, and the cooling capacity is reused to pre cool the VOCs containing waste gas entering the recovery and treatment device, which has energy-saving effect. The adsorption unit is generally equipped with two adsorption tanks, one desorption vacuum pump, and several electric or pneumatic valves for switching adsorption and desorption. The vacuum pump also needs to be equipped with a cooling system.

　　冷凝與吸附聯(lián)用技術(shù)能夠克服單純冷凝技術(shù)在應(yīng)用過程中能耗大、運行成本高的現(xiàn)象，同時彌補單純吸附技術(shù)在應(yīng)用過程中，設(shè)備體積大、吸附溫升對安全運行有影響、長期運行吸附材料易失活等問題。單位投資大致為0.4-0.8萬/m3，單位小時運行成本為0.08-0.2元/m3。凈化效率一般大于98%。主要適用于石油化工、有機化工、油氣儲運等行業(yè)。主要適用于儲油庫、煉油廠、石油化工廠等成品油/化工品裝車油氣回收；液體儲罐呼吸氣 VOCs 治理；油品、化工品碼頭裝船油氣回收。

　　The combination of condensation and adsorption technology can overcome the phenomenon of high energy consumption and operating costs in the application process of simple condensation technology, while also compensating for the problems of large equipment volume, impact of adsorption temperature rise on safe operation, and easy deactivation of adsorption materials during long-term operation of simple adsorption technology. The unit investment is approximately 0.4-0.08 million/m3, and the hourly operating cost is 0.08-0.2 yuan/m3. The purification efficiency is generally greater than 98%. Mainly applicable to industries such as petrochemicals, organic chemicals, and oil and gas storage and transportation. Mainly suitable for oil and gas recovery of finished oil/chemical products loaded onto trucks in oil storage tanks, refineries, petrochemical plants, etc; Treatment of VOCs in liquid storage tank breathing gas; Oil and gas recovery from loading at oil and chemical terminals.

　　（4）沸石轉(zhuǎn)輪與蓄熱燃燒VOCs治理技術(shù)

　　(4) Zeolite Wheel and Thermal Storage Combustion VOCs Treatment Technology

　　該技術(shù)采用高濃縮倍率沸石轉(zhuǎn)輪設(shè)備將廢氣濃度濃縮 5-20倍，富集的廢氣進入燃燒爐或催化爐（RTO/RCO）進行燃燒處理，VOCs 被徹底分解成 CO2 和 H2O。同時反應(yīng)后的高溫?zé)煔膺M入特殊結(jié)構(gòu)的陶瓷蓄熱體，80-95%以上的熱量被蓄熱體吸收，使得出口氣體溫度降至接近進口溫度。不同蓄熱體通過切換閥或者旋轉(zhuǎn)裝置隨時間進行轉(zhuǎn)換，分別進行吸熱和放熱，對系統(tǒng)熱量進行有效回收和利用。

　　This technology uses a high concentration ratio zeolite rotary equipment to concentrate the exhaust gas concentration by 5-20 times. The enriched exhaust gas enters the combustion furnace or catalytic furnace (RTO/RCO) for combustion treatment, and VOCs are completely decomposed into CO2 and H2O. At the same time, the high-temperature flue gas after the reaction enters the specially structured ceramic heat storage body, and more than 80-95% of the heat is absorbed by the heat storage body, causing the outlet gas temperature to drop to near the inlet temperature. Different thermal storage bodies are converted over time through switching valves or rotating devices, respectively absorbing and releasing heat, effectively recovering and utilizing system heat.

　　沸石轉(zhuǎn)輪吸附濃縮＋蓄熱式燃燒工藝流程示意圖

　　Schematic diagram of zeolite rotary adsorption concentration+regenerative combustion process flow

　　工藝流程主要由沸石轉(zhuǎn)輪濃縮（吸附區(qū)域、脫附區(qū)域、冷卻區(qū)域）、脫附系統(tǒng)、蓄熱式燃燒系統(tǒng)（RTO爐體、陶瓷蓄熱體、燃燒系統(tǒng)等）及控制系統(tǒng)等部分組成。

　　The process flow mainly consists of zeolite wheel concentration (adsorption zone, desorption zone, cooling zone), desorption system, regenerative combustion system (RTO furnace body, ceramic regenerative body, combustion system, etc.), and control system.

　　①吸附脫附：沸石分子篩轉(zhuǎn)輪分為吸附區(qū)、脫附區(qū)和冷卻區(qū)三個功能區(qū)域，沸石分子篩轉(zhuǎn)輪吸附濃縮系統(tǒng)利用吸附-脫附-冷卻這一連續(xù)性過程，對VOCs廢氣進行吸附濃縮。首先，廢氣進入沸石分子篩轉(zhuǎn)輪的吸附區(qū)，VOCs被沸石分子篩吸附除去，被凈化后排出。吸附在分子篩轉(zhuǎn)輪中的VOCs，在脫附區(qū)經(jīng)過約200℃小風(fēng)量的熱風(fēng)處理而被脫附、濃縮。再生后的沸石分子篩轉(zhuǎn)輪在冷卻區(qū)被冷卻，如此反復(fù)。

　　① Adsorption and desorption: The zeolite molecular sieve rotary wheel is divided into three functional areas: adsorption zone, desorption zone, and cooling zone. The zeolite molecular sieve rotary wheel adsorption and concentration system utilizes the continuous process of adsorption desorption cooling to adsorb and concentrate VOCs waste gas. Firstly, the exhaust gas enters the adsorption zone of the zeolite molecular sieve wheel, and VOCs are adsorbed and removed by the zeolite molecular sieve, purified and discharged. The VOCs adsorbed in the molecular sieve impeller are desorbed and concentrated in the desorption zone after being treated with a small amount of hot air at about 200 ℃. The regenerated zeolite molecular sieve wheel is cooled in the cooling zone, and this process is repeated.

　?、谛顭崾饺紵好摳胶蟮母邼舛刃★L(fēng)量廢氣進入蓄熱式燃燒處理系統(tǒng)，首先進入蓄熱室 A 的陶瓷介質(zhì)層，陶瓷釋放熱量，溫度降低，而有機廢氣吸收熱量，溫度升高，廢氣離開蓄熱室后以較高的溫度進入氧化室。在氧化室中，有機廢氣由燃燒器加熱升溫至設(shè)定的氧化溫度800℃以上，使其中的VOCs分解成二氧化碳和水后排放。

　?、?Regenerative combustion: The high concentration and low air volume exhaust gas after desorption enters the regenerative combustion treatment system. Firstly, it enters the ceramic medium layer of the regenerative chamber A. The ceramic releases heat and the temperature decreases, while the organic exhaust gas absorbs heat and the temperature increases. After leaving the regenerative chamber, the exhaust gas enters the oxidation chamber at a higher temperature. In the oxidation chamber, organic waste gas is heated by a burner to a set oxidation temperature of over 800 ℃, causing VOCs to decompose into carbon dioxide and water before being discharged.

　?、蹚U氣流經(jīng)蓄熱室A升溫后進入氧化室氧化，凈化后的高溫氣體離開氧化室，進入蓄熱室B，釋放熱量，降溫排出，而蓄熱室B吸收大量熱量后升溫，同時清掃蓄熱室C。循環(huán)完成后，進氣與出氣閥門進行一次切換，進入下一個循環(huán)，廢氣由蓄熱室B進入，蓄熱室C排出，清掃蓄熱室A。如此交替。由于廢氣已在蓄熱室內(nèi)預(yù)熱，燃料耗量大為減少，運行成本大大降低。

　?、?After the exhaust gas flows through the heat storage chamber A and is heated up, it enters the oxidation chamber for oxidation. The purified high-temperature gas leaves the oxidation chamber and enters the heat storage chamber B, releasing heat and cooling down before being discharged. The heat storage chamber B absorbs a large amount of heat and heats up while cleaning the heat storage chamber C. After the cycle is completed, the inlet and outlet valves are switched once to enter the next cycle. The exhaust gas enters from the heat storage chamber B, the heat storage chamber C is discharged, and the heat storage chamber A is cleaned. This process alternates. Due to the preheating of exhaust gas in the heat storage chamber, fuel consumption is greatly reduced and operating costs are greatly reduced.

　　目前技術(shù)成熟、穩(wěn)定，可實現(xiàn)自動化運行。單位投資大致為9-24萬元/千（m3/h），回收的有機物成本700-3000元/t。熱回收效率可達90-95%，處理效率可達95-99%。主要適用于有機化工、石油化工、涂裝、印刷等行業(yè)及大風(fēng)量低濃度行業(yè)。

　　At present, the technology is mature and stable, and can achieve automated operation. The unit investment is approximately 90000 to 240000 yuan per thousand (m3/h), and the cost of recovering organic matter is 700-3000 yuan per ton. The heat recovery efficiency can reach 90-95%, and the treatment efficiency can reach 95-99%. Mainly suitable for industries such as organic chemicals, petrochemicals, painting, printing, as well as high air volume and low concentration industries.

　　（5）低濃度多組分工業(yè)廢氣生物凈化技術(shù)

　　(5) Low concentration multi-component industrial waste gas biological purification technology

　　該技術(shù)利用高效復(fù)合功能菌劑與擴培技術(shù)，強化廢氣生物凈化的反應(yīng)過程，針對不同類型廢氣應(yīng)用新型的生物凈化工藝，強化廢氣生物凈化的傳質(zhì)過程，裝填具有高比表面積和生物固著力的生物填料，解決微生物附著難、系統(tǒng)運行不穩(wěn)定的問題。

　　This technology utilizes efficient composite functional microbial agents and expansion techniques to enhance the reaction process of biological purification of waste gas. New biological purification processes are applied for different types of waste gas to strengthen the mass transfer process of biological purification of waste gas. Biological fillers with high specific surface area and biological fixation force are loaded to solve the problems of difficult microbial attachment and unstable system operation.

　　低濃度多組分工業(yè)廢氣生物凈化技術(shù)

　　Low concentration multi-component industrial waste gas biological purification technology

　　工藝流程以生物氧化為主、化學(xué)吸收為輔，主要通過生物處理去除廢氣中的絕大部分污染物，化學(xué)吸收單元則可在進氣濃度發(fā)生異常時，為系統(tǒng)的穩(wěn)定達標(biāo)排放提供進一步保證。主體技術(shù)生物滴濾箱由濾床、營養(yǎng)液循環(huán)噴淋系統(tǒng)、參數(shù)控制系統(tǒng)等組成。廢氣進入生物箱體后，通過附著在填料上的微生物的代謝作用，廢氣中的污染物被降解為簡單的無機物。其中，VOCs分解為CO2、H2O以及其他簡單的無機物；含氮污染物中的氮元素轉(zhuǎn)化為硝酸鹽或氮氣；含硫惡臭污染物中的硫元素轉(zhuǎn)化為硫酸鹽。

　　The process flow is mainly based on biological oxidation, supplemented by chemical absorption. The vast majority of pollutants in the exhaust gas are removed through biological treatment. The chemical absorption unit can provide further guarantee for the stable and compliant emissions of the system when the intake concentration is abnormal. The main technology of the biological drip filter box consists of a filter bed, nutrient solution circulation spray system, parameter control system, etc. After entering the biological chamber, the pollutants in the exhaust gas are degraded into simple inorganic substances through the metabolic process of microorganisms attached to the packing. Among them, VOCs decompose into CO2, H2O, and other simple inorganic substances; The nitrogen element in nitrogen-containing pollutants is converted into nitrate or nitrogen gas; The sulfur element in sulfur-containing odorous pollutants is converted into sulfates.

　　此項技術(shù)適用范圍廣，適用于低濃度多組分工業(yè)廢氣排放控制，與傳統(tǒng)生物技術(shù)相比，拓寬了生物處理法的應(yīng)用范圍。運行管理方便，二次污染少。工程主體設(shè)備投資約為250萬元，年運行費用約35萬元。VOCs的去除率可達80-90%，對H2S的去除率可達95%以上。主要用于低濃度多組分工業(yè)廢氣的處理。

　　This technology has a wide range of applications and is suitable for controlling low concentration multi-component industrial waste gas emissions. Compared with traditional biotechnology, it broadens the application scope of biological treatment methods. Easy operation and management, with minimal secondary pollution. The investment in the main equipment of the project is about 2.5 million yuan, and the annual operating cost is about 350000 yuan. The removal rate of VOCs can reach 80-90%, and the removal rate of H2S can reach over 95%. Mainly used for the treatment of low concentration multi-component industrial waste gas.

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