Sludge drying waste gas treatment system
Patent Information
- Application Number
- CN202522511609.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-11-26
AI Technical Summary
[0005]本申请的目的在于克服上述技术不足，提出一种污泥干化废气治理系统，解决现有技术中废气治理效果不佳，且运行成本高的技术问题
[0016]与现有技术相比，本申请提供的污泥干化废气治理系统，通过将废气依次经过化学洗涤装置、降温装置、生物滤池装置和脉冲电浆装置，利用多级组合治理废气的工艺，能够针对性地处理硫化氢（H2S）、氨气（NH3）及挥发性有机物（VOCs）等各类废气成分，实现废气深度净化，提升废气的净化效果；并且采用脉冲电浆技术作为深度除臭工艺，相比较传统使用药剂的方案能够有效降低使用成本，提高废气治理系统的运行经济性。
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Figure CN224877701U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of waste gas treatment technology, specifically to a sludge drying waste gas treatment system. Background Technology
[0002] With the continuous increase in industrial, agricultural, and domestic water use, my country's water treatment technology has also matured, resulting in a large amount of sludge. In the process of sludge disposal, it is necessary to dry the sludge. The sludge drying process releases a large amount of malodorous waste gas, the main components of which include hydrogen sulfide (H2S), ammonia (NH3), and volatile organic compounds (VOCs). These gases are highly concentrated, complex in composition, and have a strong irritant effect.
[0003] The main challenges currently facing sludge drying and deodorization technology include: 1. Low deodorization efficiency. For example, methods such as single biological filters and chemical washing are insufficient in removing complex waste gases. In particular, the effectiveness of biological filters will decrease significantly under high temperature and sodium hypochlorite residue conditions. 2. High operating costs. Traditional processes require frequent replacement of consumables (such as activated carbon) or consumption of large amounts of chemicals, resulting in poor long-term economic efficiency.
[0004] Therefore, current sludge drying waste gas treatment systems suffer from technical problems such as poor waste gas treatment effect and high operating cost. Utility Model Content
[0005] The purpose of this application is to overcome the above-mentioned technical deficiencies and propose a sludge drying waste gas treatment system to solve the technical problems of poor waste gas treatment effect and high operating cost in the existing technology.
[0006] To achieve the above-mentioned technical objectives, this application adopts the following technical solution: In a first aspect, this application provides a sludge drying waste gas treatment system, which includes a chemical scrubbing device, a cooling device, a biological filter device, and a pulsed plasma device. The chemical scrubbing device includes a wet scrubbing tower for scrubbing the waste gas; the cooling device is connected to the chemical scrubbing device and includes a greywater scrubbing tower and a dry heat exchanger. The greywater scrubbing tower is used to remove sodium hypochlorite from the waste gas, and the dry heat exchanger is used to control the temperature of the waste gas; the biological filter device is connected to the cooling device and includes composite packing material for purifying the waste gas; the pulsed plasma device is connected to the biological filter device and includes a plasma generator for decomposing organic matter and a water scrubbing tower for absorbing ozone.
[0007] In some embodiments, the chemical scrubbing apparatus includes a first wet scrubbing tower and a second wet scrubbing tower connected in sequence; the first wet scrubbing tower is used to remove ammonia, and the second wet scrubbing tower is used to remove hydrogen sulfide and organic gases.
[0008] In some embodiments, the first wet scrubbing tower and the second wet scrubbing tower are respectively provided with pH adjustment modules, which are used to adjust the pH value of the exhaust gas to neutral.
[0009] In some embodiments, the cooling device further includes a return water pipe, one end of which is connected to a greywater scrubbing tower and the other end of which is connected to a sewage treatment system.
[0010] In some embodiments, the composite filler includes bamboo charcoal and ceramsite, wherein the particle size of the ceramsite ranges from 20 mm to 40 mm.
[0011] In some embodiments, the residence time T1 of the exhaust gas in the biological filter device satisfies T1≥40s.
[0012] In some embodiments, the circulating water volume Q of the water scrubbing tower satisfies Q≥90m³. 3 / h, the residence time of the exhaust gas in the water scrubbing tower is T2, which satisfies T2≥3s.
[0013] In some embodiments, the waste gas treatment system further includes an emergency activated carbon device, which is connected to the water scrubbing tower and is used to adsorb and purify the waste gas emitted from the water scrubbing tower.
[0014] In some embodiments, the exhaust gas treatment system further includes an intelligent control device, which includes a control unit and various sensors that are signal-connected to the control unit. The various sensors are capable of acquiring information data about the exhaust gas.
[0015] In some embodiments, the plurality of sensors include one or more of the following: exhaust gas flow sensor, temperature sensor, hydrogen sulfide concentration sensor, ammonia concentration sensor, volatile organic compound concentration sensor, wind speed sensor, and air pressure sensor.
[0016] Compared with existing technologies, the sludge drying waste gas treatment system provided in this application, by sequentially passing the waste gas through a chemical scrubbing device, a cooling device, a biological filter device, and a pulsed plasma device, utilizes a multi-stage combined waste gas treatment process to specifically treat various waste gas components such as hydrogen sulfide (H2S), ammonia (NH3), and volatile organic compounds (VOCs), achieving deep purification of the waste gas and improving the purification effect. Furthermore, the use of pulsed plasma technology as a deep deodorization process can effectively reduce operating costs and improve the operational economy of the waste gas treatment system compared with traditional chemical-based solutions. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of a sludge drying waste gas treatment system provided in an embodiment of this application; Figure 2 This is a process flow diagram of the sludge drying waste gas treatment system provided in the embodiments of this application; Figure 3 This is a schematic diagram of the cooling device provided in the embodiments of this application; Figure 4 This is a schematic diagram of the pulsed plasma device provided in the embodiments of this application.
[0018] Explanation of reference numerals in the attached figures: 100. Waste gas treatment system; 110. Chemical scrubbing unit; 111. First wet scrubbing tower; 112. Second wet scrubbing tower; 120. Cooling device; 121. Greywater scrubbing tower; 122. Dry heat exchanger; 130. Biological filter device; 140. Pulsed plasma device; 141. Plasma generator; 142. Water washing tower; 150. Emergency activated carbon device. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0020] The sludge drying process releases a large amount of malodorous waste gas, whose main components include hydrogen sulfide (H2S), ammonia (NH3) and volatile organic compounds (VOCs). These gases are highly concentrated, complex in composition, and have a strong irritant effect.
[0021] In some embodiments, a single biological filter and chemical scrubbing with added agents are used to treat the waste gas. However, this method is not very effective in treating waste gas. In particular, the purification effect of the biological filter will decrease significantly under high temperature and sodium hypochlorite residue conditions. Furthermore, the large amount of agents used will increase the operating cost of the waste gas treatment system, resulting in poor long-term economic efficiency.
[0022] To address the technical problems of poor waste gas treatment effect and high operating cost, this application provides a sludge drying waste gas treatment system. By sequentially passing the waste gas through a chemical scrubbing device, a cooling device, a biological filter device, and a pulsed plasma device, the system utilizes a multi-stage combined waste gas treatment process to specifically treat various waste gas components such as hydrogen sulfide (H2S), ammonia (NH3), and volatile organic compounds (VOCs), achieving deep purification of the waste gas and improving the purification effect. Furthermore, the use of pulsed plasma technology as a deep deodorization process effectively reduces operating costs and improves the operational economy of the waste gas treatment system compared to traditional chemical-based solutions.
[0023] It should be noted that the exhaust gas treatment system of this application is used for, but not limited to, the treatment of sludge drying process in sewage treatment plants. For ease of explanation, this application only uses the application of the exhaust gas treatment system in the treatment of sludge drying process in sewage treatment plants as an example. The principle of the exhaust gas treatment system applied to any other scenario that requires exhaust gas treatment is essentially the same as the principle applied to the treatment of sludge drying process in sewage treatment plants, and will not be elaborated here.
[0024] This application provides a sludge drying waste gas treatment system 100, such as... Figures 1 to 4 As shown, the sludge drying waste gas treatment system 100 includes a chemical scrubbing device 110, a cooling device 120, a biological filter device 130, and a pulsed plasma device 140. The chemical scrubbing device 110 includes a wet scrubbing tower for scrubbing waste gas. The cooling device 120 is connected to the chemical scrubbing device 110 and includes a greywater scrubbing tower 121 and a dry heat exchanger 122. The greywater scrubbing tower 121 is used to remove sodium hypochlorite from the waste gas, and the dry heat exchanger 122 is used to control the temperature of the waste gas. The biological filter device 130 is connected to the cooling device 120 and includes composite packing material for purifying waste gas. The pulsed plasma device 140 is connected to the biological filter device 130 and includes a plasma generator 141 for decomposing organic matter and a water scrubbing tower 142 for absorbing ozone.
[0025] In this embodiment, the exhaust gas enters the chemical scrubbing device 110. The chemical scrubbing device 110 is used to remove hydrogen sulfide (H2S), ammonia (NH3), and volatile organic compounds (VOCs) from the exhaust gas. The chemical scrubbing device 110 includes different wet scrubbing towers. Different agents such as sulfuric acid (H2SO4), sodium hydroxide (NaOH), and sodium hypochlorite (NaClO) are added to these wet scrubbing towers to remove the corresponding gases in the exhaust gas, thus achieving exhaust gas purification. The residence time of the exhaust gas in the chemical scrubbing device 110 can be determined according to actual needs. For example, the contact time in the wet scrubbing tower can be 4 seconds, 6 seconds, 8 seconds, 10 seconds, etc. A contact time of 4 seconds or more in the wet scrubbing tower improves the purification effect.
[0026] In this embodiment, the exhaust gas leaves the chemical scrubbing device 110 and enters the cooling device 120. The cooling device 120 includes a greywater scrubbing tower 121 and a dry heat exchanger 122. The main function of the greywater scrubbing tower 121 is to remove sodium hypochlorite (NaClO) from the exhaust gas, thereby reducing its interference with the subsequent biological filter treatment process. The dry heat exchanger 122 indirectly cools the exhaust gas through greywater to ensure that the exhaust gas temperature is controlled within a suitable range. The specific temperature range can be determined according to the actual needs of the equipment, such as 40℃, 38℃, 35℃, 32℃, 30℃, etc. The dry heat exchanger 122 controls the exhaust gas temperature below 40℃, thereby ensuring that the microorganisms in the subsequent biological filter device 130 can work under better temperature conditions.
[0027] In this embodiment, the exhaust gas leaves the cooling device 120 and enters the biological filter device 130. The biological filter device 130 includes composite packing material used to purify the exhaust gas. The material of the composite packing material is not limited and can be determined according to actual needs; for example, the composite packing material may include bamboo charcoal and ceramsite. The specific surface area of the composite packing material in the biological filter device 130 can also be determined according to needs; for example, the specific surface area of the composite packing material in the biological filter device 130 may exceed 260 m² / g. The residence time of the exhaust gas in the biological filter device 130 is also determined according to actual needs, such as 40 seconds, 50 seconds, 60 seconds, etc. By controlling the residence time of the exhaust gas in the biological filter device 130 to be more than 40 seconds, the purification effect is improved.
[0028] In this embodiment, the exhaust gas leaves the biofilter device 130 and enters the pulsed plasma device 140. The pulsed plasma device 140 includes a plasma generator 141 and a water scrubbing tower 142. The plasma generator 141 generates high-energy plasma using high-voltage discharge technology. The power of the plasma generator 141 is determined based on actual conditions, sufficient to effectively decompose the residual recalcitrant organic matter in the biofilter device 130; for example, a power density of 14.4 kW / 10,000 m³ / h is used, and the entire treatment process takes no more than 1 second. The downstream water scrubbing tower 142 of the plasma generator 141 absorbs excess ozone. In this embodiment, by sequentially passing the waste gas through a chemical scrubbing device 110, a cooling device 120, a biological filter device 130, and a pulsed plasma device 140, a multi-stage combined waste gas treatment process can specifically treat various waste gas components such as hydrogen sulfide (H2S), ammonia (NH3), and volatile organic compounds (VOCs), achieving deep purification of the waste gas and improving the purification effect. Furthermore, the use of pulsed plasma technology as a deep deodorization process can effectively reduce operating costs and improve the operational economy of the waste gas treatment system compared to traditional chemical-based solutions.
[0029] In some embodiments, such as Figure 1 and Figure 2As shown, the chemical scrubbing apparatus 110 includes a first wet scrubbing tower 111 and a second wet scrubbing tower 112 connected in sequence; the first wet scrubbing tower 111 is used to remove ammonia, and the second wet scrubbing tower 112 is used to remove hydrogen sulfide and organic gases.
[0030] In this embodiment, the chemical scrubbing device 110 includes two interconnected wet scrubbing towers. When the waste gas passes through the first wet scrubbing tower 111, the first wet scrubbing tower 111 uses sulfuric acid (H2SO4) to remove ammonia (NH3) from the waste gas. When the waste gas passes through the second wet scrubbing tower 112, the second wet scrubbing tower 112 uses sodium hydroxide (NaOH) and sodium hypochlorite (NaClO) to remove hydrogen sulfide (H2S) and other organic gases from the waste gas.
[0031] In some embodiments, the first wet scrubbing tower 111 and the second wet scrubbing tower 112 are respectively provided with pH adjustment modules, which are used to adjust the exhaust gas to neutral.
[0032] In this embodiment, the pH adjustment module includes a pH sensor and a control module. The pH sensor is in contact with the washing liquid in the washing tower, collects the pH value in real time, converts it into an electrical signal and transmits it to the control module. The control module receives the signal from the pH sensor, compares it with the preset pH threshold, and automatically controls the amount of acid and alkali reagents added to maintain pH stability.
[0033] For example, the first wet scrubbing tower 111 removes ammonia (NH3). Ammonia reacts with sulfuric acid to produce acidic products, which may cause the scrubbing liquid to be too acidic. The control module controls the first wet scrubbing tower 111 to add a small amount of alkaline neutralizing agent to prevent acidic waste gas from directly entering the subsequent devices. For example, the second wet scrubbing tower 112 removes hydrogen sulfide (H2S). Excessive alkaline agent may cause the scrubbing liquid to be too alkaline. The control module controls the second wet scrubbing tower 112 to add a small amount of acidic agent to ensure that the pH of the finally discharged waste gas is neutral.
[0034] In some embodiments, the cooling device 120 further includes a return water pipe, one end of which is connected to the greywater scrubbing tower 121, and the other end of which is connected to the sewage treatment system.
[0035] In this embodiment, the heated water generated by the cooling device 120 can be used in the sewage treatment system through the return water pipe, for example, for the dosing device and flushing device in the sewage treatment system, so as to reduce water waste.
[0036] In some embodiments, the composite filler includes bamboo charcoal and ceramsite, wherein the particle size of the ceramsite ranges from 20 mm to 40 mm.
[0037] In this embodiment, the specific surface area of the composite packing in the biological filter device 130 exceeds 260 m² / g, and the particle size of the ceramsite ranges from 20 mm to 40 mm, for example, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, etc.
[0038] In some embodiments, the residence time T1 of the exhaust gas in the biological filter device 130 satisfies T1≥40s.
[0039] In this embodiment, the longer the waste gas stays in the biological filter device 130, the better the purification effect. By controlling the residence time T1 of the waste gas in the biological filter device 130 to more than 40 seconds, the deep purification effect is improved.
[0040] In some embodiments, the circulating water volume Q of the water washing tower 142 satisfies Q≥90m³. 3 / h, the residence time of the exhaust gas in the water scrubbing tower is T2, which satisfies T2≥3s.
[0041] In this embodiment, the circulating water volume Q of the water washing tower 142 satisfies Q≥90m³. 3 / h, specifically 90m 3 / h、100m 3 / h、110m 3 / h, 120m 3 / h, 150m 3 / h, etc.; the residence time T2 of the exhaust gas in the water scrubbing tower must satisfy T2≥3s, specifically 3s, 4s, 5s, 6s, 7s, etc. By adopting Q≥90m 3 The design of / h and T2≥3s enables the water washing tower 142 to more fully absorb excess ozone in the exhaust gas.
[0042] In some embodiments, such as Figure 1 and Figure 2 As shown, the waste gas treatment system 100 also includes an emergency activated carbon device 150, which is connected to the water washing tower 142 and is used to adsorb and purify the waste gas emitted by the water washing tower 142.
[0043] In this embodiment, the emergency activated carbon device 150 can serve as a backup device for the waste gas treatment system 100, activated under special meteorological conditions such as low air pressure and high load to ensure emission safety. The emergency activated carbon device 150 includes an activated carbon layer, the adsorption capacity of which can be determined according to requirements, for example, 800 g / m³, 1000 g / m³, 1500 g / m³, etc. The contact time between the waste gas and the activated carbon layer can be, for example, 4 seconds, 5 seconds, 6 seconds, 8 seconds, etc. By configuring the activated carbon layer with an adsorption capacity ≥800 g / m³ and a contact time between the waste gas and the activated carbon layer greater than or equal to 4 seconds, the purification effect of the waste gas emitted from the water scrubbing tower 142 is improved.
[0044] In some embodiments, the exhaust gas treatment system 100 further includes an intelligent control device, which includes a control unit and various sensors that are signal-connected to the control unit. The various sensors are capable of acquiring information data of the exhaust gas.
[0045] In some embodiments, the plurality of sensors include one or more of the following: exhaust gas flow sensor, temperature sensor, hydrogen sulfide concentration sensor, ammonia concentration sensor, volatile organic compound concentration sensor, wind speed sensor, and air pressure sensor.
[0046] In this embodiment, the intelligent control device includes an exhaust gas flow sensor, a temperature sensor, a hydrogen sulfide concentration sensor, an ammonia concentration sensor, a volatile organic compound (VOC) concentration sensor, a wind speed sensor, and a pressure sensor. For example, the exhaust gas flow sensor can be installed at the inlet of the chemical scrubbing device 110, and at the inlet and outlet of the pulsed plasma device 140, to acquire exhaust gas flow information. For example, the temperature sensor can be installed at the inlet and outlet of the cooling device 120 to acquire exhaust gas temperature information. For example, various concentration sensors can be installed at the inlet of the chemical scrubbing device 110 and at the outlet of each device to acquire corresponding gas concentration information. For example, the wind speed sensor and the pressure sensor can be arranged in the surrounding area of the exhaust gas treatment system 100.
[0047] In this embodiment, the control unit, for example, is a PLC, which automatically adjusts the dosage of the chemical detergent in the chemical washing device 110, the fan frequency of the cooling device 120, and the power of the plasma generator in the pulse plasma device 140, etc., based on real-time data. It can also switch between different operating modes based on information from wind speed and air pressure sensors.
[0048] To better understand this application, the following is combined with... Figures 1 to 4 The technical solution of this application is described in detail.
[0049] In some embodiments, the sludge drying waste gas treatment system 100 includes a chemical washing device 110, a cooling device 120, a biological filter device 130, a pulsed plasma device 140, an emergency activated carbon device 150, and an intelligent control device.
[0050] In this embodiment, the chemical scrubbing device 110 includes a first wet scrubbing tower 111 and a second wet scrubbing tower 112 connected in sequence. The first wet scrubbing tower 111 uses sulfuric acid (H2SO4) to remove ammonia (NH3) from the waste gas, and the residence time of the waste gas in the first wet scrubbing tower 111 is ≥4s. The second wet scrubbing tower 112 uses sodium hydroxide (NaOH) and sodium hypochlorite (NaClO) to remove hydrogen sulfide (H2S) and other organic gases from the waste gas, and the residence time of the waste gas in the second wet scrubbing tower 112 is ≥4s.
[0051] In this embodiment, the inlet temperature of the exhaust gas entering the cooling device 120 is ≤65℃, the outlet temperature of the exhaust gas leaving the cooling device 120 is ≤40℃, and the inlet water temperature of the cooling device 120 is ≤25℃. The residence time of the exhaust gas in the greywater scrubbing tower 121 is ≥5s, the circulating water volume corresponding to every 10,000 m³ / h (processed gas volume) is ≥40 m³ / h, and the replenishment of fresh greywater is ≤10 m³ / h. 3 For every 10,000 m³ / h (gas processing capacity), the corresponding dry heat exchanger heat exchange area is ≤500 m², and the greywater flow rate is ≤100 m³ / h. The heated greywater generated by the cooling device 120 can be used in the wastewater treatment system through the return water pipeline to reduce water waste.
[0052] In this embodiment, the biological filter device 130 uses a composite packing material of bamboo charcoal and ceramsite. The specific surface area of the biological section packing material is greater than 260 m² / g, the particle size is 20 mm to 40 mm, and the bacterial community is inoculated with sulfur-oxidizing bacteria, nitrifying bacteria, etc., with a residence time ≥ 40 s.
[0053] In this embodiment, the plasma generator 141 has a power of 14.4 kW / 10,000 m³ / h and a processing time of ≤1 s; the water washing tower 142 absorbs excess ozone, with a contact time ≥3 seconds and a circulating water volume ≥90 m³ / h. 3 / h.
[0054] In this embodiment, the emergency activated carbon device 150 is equipped with an activated carbon layer with an adsorption capacity of ≥800g / m³ and a contact time of ≥4 seconds. The exhaust gas treated by the water washing tower 142 can be discharged directly, or it can be connected to the emergency activated carbon device 150 and discharged after being treated by the emergency activated carbon device 150.
[0055] In this embodiment, when the odor concentration at the outlet of the biofilter device 130 is ≥600, the power of the plasma generator 141 is increased to 100%. Under low-pressure climate conditions (pressure ≤980hPa), the system automatically switches to the mode using the emergency activated carbon device 150.
[0056] In this embodiment, the emission concentration of waste gas treated by the sludge drying waste gas treatment system 100 can be stably controlled within the current stringent domestic standards, for example, the odor concentration at organized discharge outlets is ≤300, and the odor concentration at the plant boundary is ≤10. By adopting pulsed plasma technology as a deep deodorization process, replacing traditional high-cost processes such as frequent activated carbon replacement and large consumption of chemical agents, the total annual cost is reduced by approximately 30% compared to traditional solutions. The sludge drying waste gas treatment system 100 produces no secondary pollution (waste liquid, waste residue) and is adaptable to extreme climatic conditions. The sludge drying waste gas treatment system 100 features automated control, reducing manual intervention and ensuring high system stability.
[0057] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Any other corresponding changes and modifications made based on the technical concept of this application should be included within the scope of protection of the claims of this application.
Claims
1. A sludge drying waste gas treatment system, characterized in that, include: Chemical scrubbing apparatus, including wet scrubbing towers for waste gas scrubbing; A cooling device is connected to the chemical scrubbing device. The cooling device includes a greywater scrubbing tower and a dry heat exchanger. The greywater scrubbing tower is used to remove sodium hypochlorite from the waste gas, and the dry heat exchanger is used to control the temperature of the waste gas. A biological filter device is connected to the cooling device. The biological filter device includes composite packing material, which is used to purify the waste gas. A pulsed plasma device is connected to the biofilter device, and the pulsed plasma device includes a plasma generator for decomposing organic matter and a water scrubbing tower for absorbing ozone.
2. The sludge drying waste gas treatment system according to claim 1, characterized in that, The chemical washing device includes a first wet scrubbing tower and a second wet scrubbing tower connected in sequence. The first wet scrubbing tower is used to remove ammonia, and the second wet scrubbing tower is used to remove hydrogen sulfide and organic gases.
3. The sludge drying waste gas treatment system according to claim 2, characterized in that, The first wet scrubbing tower and the second wet scrubbing tower are each equipped with a pH adjustment module, which is used to adjust the pH value of the exhaust gas to neutral.
4. The sludge drying waste gas treatment system according to claim 1, characterized in that, The cooling device also includes a return water pipe, one end of which is connected to the greywater scrubbing tower, and the other end of which is connected to the sewage treatment system.
5. The sludge drying waste gas treatment system according to claim 1, characterized in that, The composite filler includes bamboo charcoal and ceramsite, with the ceramsite having a particle size ranging from 20 mm to 40 mm.
6. The sludge drying waste gas treatment system according to claim 5, characterized in that, The residence time T1 of the waste gas in the biological filter device satisfies T1≥40s.
7. The sludge drying waste gas treatment system according to claim 1, characterized in that, The circulating water volume Q of the water washing tower satisfies Q≥90m³. 3 / h, the residence time of the waste gas in the water washing tower is T2, which satisfies T2≥3s.
8. The sludge drying waste gas treatment system according to claim 7, characterized in that, The waste gas treatment system also includes an emergency activated carbon device, which is connected to the water washing tower and is used to adsorb and purify the waste gas emitted from the water washing tower.
9. The sludge drying waste gas treatment system according to claim 1, characterized in that, The waste gas treatment system also includes an intelligent control device, which includes a control unit and various sensors connected to the control unit. These sensors are capable of acquiring information data about the waste gas.
10. The sludge drying waste gas treatment system according to claim 9, characterized in that, The various sensors include one or more of the following: exhaust gas flow sensor, temperature sensor, hydrogen sulfide concentration sensor, ammonia concentration sensor, volatile organic compound concentration sensor, wind speed sensor, and air pressure sensor.