Sludge low-temperature drying tail gas treatment device

Abstract

The utility model belongs to the field of waste gas treatment technology discloses a kind of sludge low-temperature drying tail gas treatment device. It includes exhaust fan, integrated spray tower and pH detection piece. Exhaust fan can be communicated with the tail gas output pipe of low-temperature drying equipment, and exhaust fan is used to dehumidify tail gas;Integrated spray tower is arranged in the downstream of exhaust fan, and integrated spray tower is used to sequentially carry out dust removal treatment and oxidation treatment to tail gas;pH detection piece is arranged in integrated spray tower, and pH detection piece is used to detect the pH value of liquid after oxidation treatment. The sludge low-temperature drying tail gas treatment device can simultaneously carry out dust removal and oxidation treatment to tail gas, and the treatment effect is good, the cost is low, the equipment stability is high, the oxidation effect can also be monitored in real time, to ensure that tail gas is completely treated.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to a sludge low-temperature drying tail gas treatment device. Background Technology

[0002] With the acceleration of urbanization and the expansion of industrial development, the amount of sewage sludge generated is also increasing, posing a growing threat to environmental pollution. Therefore, the requirements and standards for sludge treatment are becoming increasingly stringent. Low-temperature drying is a common method for treating sludge. However, due to the complexity of the sludge's composition, ammonia, hydrogen sulfide, and other substances are released during the low-temperature drying process, impacting the environment. To prevent secondary pollution from sludge drying and maintain a good working environment, it is necessary to collect and treat the exhaust gases from the sludge drying equipment.

[0003] The exhaust gas includes some gas extracted from the low-temperature drying equipment to maintain the negative pressure, as well as water vapor produced when moisture in the sludge evaporates during the operation of the low-temperature sludge drying equipment. It also includes organic pollutants such as ammonia and hydrogen sulfide volatilized after the sludge is dried. How to effectively treat and discharge the exhaust gas is a major problem that needs to be solved.

[0004] Therefore, there is an urgent need for a sludge low-temperature drying tail gas treatment device to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a sludge low-temperature drying tail gas treatment device that can simultaneously remove dust and oxidize the tail gas, with good treatment effect, low cost, high equipment stability, and real-time monitoring of oxidation effect to ensure complete treatment of tail gas.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The sludge low-temperature drying tail gas treatment device includes:

[0008] The dehumidification fan can be connected to the exhaust gas output pipe of the low-temperature drying equipment, and the dehumidification fan is used to dehumidify the exhaust gas;

[0009] An integrated spray tower is located downstream of the exhaust fan. The integrated spray tower is used to sequentially remove dust and oxidize the exhaust gas.

[0010] A pH sensor is installed in the integrated spray tower and is used to detect the pH value of the liquid after oxidation treatment.

[0011] Optionally, the integrated spray tower includes:

[0012] The first spray tower is used to spray water to remove dust from the exhaust gas;

[0013] The second spray tower is located downstream of the first spray tower. The second spray tower is used to spray electrolyte to oxidize the tail gas. The pH detection device is installed in the second spray tower to detect the pH value of the electrolyte.

[0014] Optionally, the integrated spray tower includes an inlet pipe and an outlet pipe. The inlet pipe is located at the top of the first spray tower and connected to the exhaust fan. The outlet pipe is located at the top of the second spray tower and connected to the chimney. The first spray tower and the second spray tower are connected.

[0015] Optionally, a connecting pipe is provided between the first spray tower and the second spray tower, with one end of the connecting pipe connected to the side wall of the first spray tower near the bottom and the other end connected to the side wall of the second spray tower near the bottom.

[0016] Optionally, the first spray tower is equipped with a first circulating spray system, in which water circulates.

[0017] Optionally, the first circulating spray system includes:

[0018] The first water tank is used to store water and is connected to the first spray tower to collect the liquid after spraying.

[0019] The first spray pipeline has an inlet connected to the first water tank and an outlet located inside the first spray tower, and is provided with several first spray nozzles, which are used for spraying water.

[0020] A first circulation pump is installed on the first spray pipeline, and the first circulation pump is used to transport water from the first water tank to the first spray pipeline.

[0021] Optionally, the first spray pipeline includes a first main pipeline and several first branch pipelines. The first main pipeline is connected to the first water tank, and the several first branch pipelines are all connected to the first main pipeline. The several first branch pipelines are arranged sequentially at intervals from the top to the bottom of the first spray tower, and several first spray nozzles are provided on the first branch pipelines.

[0022] Optionally, the second spray tower is equipped with a second circulating spray system, in which electrolyte is circulated.

[0023] Optionally, the second circulating spray system includes:

[0024] The second water tank is used to store the electrolyte and is connected to the first spray tower to collect the sprayed liquid; the pH detection device is installed on the second water tank to detect the pH value of the electrolyte in the second water tank.

[0025] A primary battery electrolysis device is disposed on one side of the second water tank. The primary battery electrolysis device is used to electrolyze the water in the second water tank to form an electrolyte.

[0026] The second spray pipeline has an inlet connected to the second water tank and an outlet located inside the second spray tower. It is equipped with several second spray nozzles, which are used to spray the electrolyte.

[0027] The second circulation pump is installed on the second spray pipeline and is used to transport the electrolyte from the second water tank to the second spray pipeline.

[0028] Optionally, the second spray pipeline includes a second main pipeline and several second branch pipelines. The second main pipeline is connected to the second water tank, and the several second branch pipelines are all connected to the second main pipeline. The several second branch pipelines are arranged sequentially and at intervals from the top to the bottom of the second spray tower, and several second spray nozzles are provided on the second branch pipelines.

[0029] The beneficial effects of this utility model are:

[0030] This invention provides a sludge low-temperature drying tail gas treatment device. By incorporating a dehumidifying fan and an integrated spray tower, it sequentially dehumidifies, dries, removes dust, and oxidizes the tail gas, achieving dust removal and purification, thus protecting the environment. Furthermore, the device integrates dust removal and oxidation within the integrated spray tower, reducing the equipment's footprint, manufacturing costs, and maintenance costs. Oxidation-based tail gas purification eliminates the need for alkaline solutions, further reducing operating costs, simplifying equipment configuration, and improving overall stability. On the other hand, a pH sensor within the integrated spray tower monitors the pH value of the post-oxidation liquid in real time. Based on pH changes, the oxidation level can be adjusted to ensure complete tail gas purification, improving reliability and further reducing environmental pollution. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the sludge low-temperature drying tail gas treatment device provided in a specific embodiment of this utility model.

[0032] In the picture:

[0033] 10. Dehumidifier fan;

[0034] 20. Integrated spray tower; 21. First spray tower; 22. Second spray tower; 23. Inlet pipe; 24. Outlet pipe; 25. Connecting pipe;

[0035] 31. First water tank; 311. First sewage outlet; 32. First spray pipe; 321. First main pipe; 322. First branch pipe; 323. First spray nozzle; 33. First circulating pump;

[0036] 41. Second water tank; 411. Second drain outlet; 42. Second spray pipe; 421. Second main pipe; 422. Second branch pipe; 423. Second spray nozzle; 43. Second circulation pump; 44. Primary battery electrolysis device;

[0037] 50. pH measuring device; 60. Chimney. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," and "abutting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0042] The following reference Figure 1 This invention introduces the sludge low-temperature drying tail gas treatment device provided by this utility model.

[0043] This embodiment provides a sludge low-temperature drying tail gas treatment device, which can simultaneously remove dust and oxidize the tail gas, with good treatment effect, low cost, high equipment stability, and real-time monitoring of oxidation effect to ensure complete treatment of tail gas.

[0044] Please refer to Figure 1 Specifically, the sludge low-temperature drying exhaust gas treatment device includes an exhaust fan 10, an integrated spray tower 20, and a pH sensor 50. The exhaust fan 10 is connected to the exhaust gas output pipe of the low-temperature drying equipment and is used to dehumidify the exhaust gas. The integrated spray tower 20 is located downstream of the exhaust fan 10 and is used to sequentially perform dust removal and oxidation treatment on the exhaust gas. The pH sensor 50 is located in the integrated spray tower 20 and is used to detect the pH value of the liquid after oxidation treatment.

[0045] The sludge low-temperature drying tail gas treatment device in this embodiment, by incorporating a dehumidifying fan 10 and an integrated spray tower 20, can sequentially dehumidify, dry, remove dust, and oxidize the tail gas, thereby achieving dust removal and purification of the tail gas, realizing tail gas treatment, and protecting the environment. Furthermore, this device integrates dust removal and oxidation within the integrated spray tower 20, reducing the equipment's footprint, manufacturing costs, and maintenance costs. Moreover, since tail gas purification is achieved through oxidation, there is no need for additional alkaline solutions, further reducing operating costs, simplifying equipment configuration, and improving overall stability. On the other hand, a pH sensor 50 is installed within the integrated spray tower 20 to monitor the pH value of the oxidized liquid in real time. Based on this, the degree of oxidation can be adjusted according to changes in pH value, ensuring complete tail gas purification, improving reliability, and further reducing environmental pollution.

[0046] Optionally, the pH detection device 50 is an automatic pH detector, which has the characteristics of high precision and high stability, as well as high efficiency and ease of use.

[0047] Furthermore, the sludge low-temperature drying exhaust gas treatment device also includes a chimney 60, which is located downstream of the integrated spray tower 20 to discharge the treated exhaust gas. During equipment operation, the exhaust gas is dehumidified by the exhaust fan 10 and guided into the integrated spray tower 20. After dust removal and oxidation are completed, the purified exhaust gas is discharged through the chimney 60, thus completing the dust removal and purification of the exhaust gas.

[0048] In this embodiment, the exhaust fan 10 includes a fan body, a filter unit, a dehumidification module, etc. The fan body can drive its own blades to form airflow and guide the exhaust gas in. The filter unit is used to filter large dust particles to avoid damage to the blades inside the fan body. The dehumidification module can be a condenser coil or a rotary dehumidifier to reduce the humidity of the exhaust gas. Through the above structure, the exhaust fan 10 achieves the guidance and dehumidification of the exhaust gas. It is understood that the specific structure of the exhaust fan 10 can directly adopt the commonly used exhaust fan 10 in the art, and will not be described in detail here.

[0049] Please refer to Figure 1 Furthermore, the integrated spray tower 20 includes a first spray tower 21 and a second spray tower 22. The first spray tower 21 is used to spray water to treat the exhaust gas for dust removal; the second spray tower 22 is located downstream of the first spray tower 21 and is used to spray electrolyte to treat the exhaust gas for oxidation. A pH detection element 50 is installed inside the second spray tower 22 to detect the pH value of the electrolyte. Through the above structure, dust removal and oxidation of the exhaust gas can be achieved.

[0050] The integrated spray tower 20 includes an inlet pipe 23 and an outlet pipe 24. The inlet pipe 23 is located at the top of the first spray tower 21 and connected to the exhaust fan 10; the outlet pipe 24 is located at the top of the second spray tower 22 and connected to the chimney 60; the first spray tower 21 and the second spray tower 22 are connected. The inlet pipe 23 and the outlet pipe 24 enable the integrated spray tower 20 to connect with the exhaust fan 10 and the chimney 60, thereby facilitating the passage of exhaust gas.

[0051] Furthermore, a connecting pipe 25 is provided between the first spray tower 21 and the second spray tower 22. One end of the connecting pipe 25 is connected to the side wall of the first spray tower 21 near the bottom, and the other end is connected to the side wall of the second spray tower 22 near the bottom, thus realizing the connection between the first spray tower 21 and the second spray tower 22. This structure allows the exhaust gas to enter the first spray tower 21 through the top for dehumidification, then flow out from its bottom and into the bottom of the second spray tower 22, finally flowing out through the top of the second spray tower 22. This results in a longer dust removal and oxidation process for the exhaust gas, improving both the dust removal and oxidation effects.

[0052] Furthermore, the first spray tower 21 is equipped with a first circulating spray system, in which water circulates and is used to spray water within the first spray tower 21 to achieve dust removal treatment of dust in the exhaust gas.

[0053] Specifically, the first circulating spray system includes a first water tank 31, a first spray pipe 32, and a first circulating pump 33. The first water tank 31 is used to store water and is connected to the first spray tower 21 to collect the sprayed liquid. The inlet of the first spray pipe 32 is connected to the first water tank 31, and the outlet is located inside the first spray tower 21. It is provided with several first spray nozzles 323 for spraying water. The first circulating pump 33 is installed on the first spray pipe 32 and is used to transport water from the first water tank 31 to the first spray pipe 32. In use, the first circulating pump 33 transports water from the first water tank 31 to the first spray pipe 32, and then sprays it through the first spray nozzles 323, thereby removing dust from the exhaust gas inside the first spray tower 21. The water after dust removal accumulates at the bottom of the first spray tower 21 and flows back into the first water tank 31 for recycling.

[0054] Of course, the first water tank 31 is also equipped with a first drain outlet 311, which can clean the water in the first water tank 31 every once in a while as needed, so that the accumulated dust can be removed, thereby better carrying out water circulation dust removal.

[0055] The first spray pipeline 32 includes a first main pipeline 321 and several first branch pipelines 322. The first main pipeline 321 is connected to the first water tank 31, and the several first branch pipelines 322 are all connected to the first main pipeline 321. The several first branch pipelines 322 are arranged sequentially and at intervals from the top to the bottom of the first spray tower 21, and each first branch pipeline 322 is provided with several first spray nozzles 323. When the first circulating pump 33 is turned on, water from the first water tank 31 is distributed to each of the first branch pipelines 322 through the first main pipeline 321, and then sprayed out through each of the first spray nozzles 323 to remove dust from the exhaust gas. Furthermore, the sequential and interval arrangement of the first branch pipelines 322 from the top to the bottom of the first spray tower 21 allows for spraying at various locations in the dust removal process, thereby increasing the dust removal area and the dust removal effect.

[0056] Preferably, in this embodiment, there are multiple first branch pipes 322 and multiple first spray nozzles 323, so that they cover all positions in the first spray tower 21 and improve the dust removal effect.

[0057] Furthermore, the second spray tower 22 is equipped with a second circulating spray system, in which electrolyte is circulated. The electrolyte is sprayed in the second spray tower 22 to achieve oxidation treatment of the exhaust gas, thereby purifying the exhaust gas.

[0058] Specifically, the second circulating spray system includes a second water tank 41, a galvanic cell electrolysis device 44, a second spray pipeline 42, and a second circulating pump 43. The second water tank 41 is used to store electrolyte and is connected to the first spray tower 21 to collect the sprayed liquid; a pH sensor 50 is installed on the second water tank 41 to detect the pH value of the electrolyte in the second water tank 41; the galvanic cell electrolysis device 44 is installed on one side of the second water tank 41 and is used to electrolyze the water in the second water tank 41 to form electrolyte; the inlet of the second spray pipeline 42 is connected to the second water tank 41, the outlet is located in the second spray tower 22, and it is provided with several second spray nozzles 423 for spraying the electrolyte; the second circulating pump 43 is installed on the second spray pipeline 42 and is used to transport the electrolyte from the second water tank 41 to the second spray pipeline 42. In operation, the water in the second water tank 41 is electrolyzed by the galvanic cell electrolysis device 44 to form an electrolyte. The second circulation pump 43 then drives the electrolyte from the second water tank 41 to the second spray pipe 42, where it is sprayed through the second spray nozzle 423. This oxidizes the exhaust gas in the second spray tower 22. The oxidized electrolyte accumulates at the bottom of the second spray tower 22 and flows back into the second water tank 41 for recycling. Furthermore, the pH sensor 50 can monitor the pH value of the oxidized electrolyte in real time. If the pH is high and weakly alkaline, complete treatment of acid radicals in the exhaust gas is ensured. If the pH value decreases, the operating power of the galvanic cell electrolysis device 44 needs to be increased to increase the generation of hydroxyl ions. If the pH value is too high and strongly alkaline, the operating power of the galvanic cell electrolysis device 44 needs to be reduced to decrease the generation of hydroxyl ions and avoid waste.

[0059] Of course, the second water tank 41 is also equipped with a second drain outlet 411, which can clean the water in the second water tank 41 every once in a while as needed, so that the accumulated dust can be removed, thereby better water circulation and dust removal.

[0060] Optionally, since the oxidized electrolyte accumulates at the bottom of the second spray tower 22 in this embodiment, the pH detection element 50 can also be placed at the bottom of the second spray tower 22 to directly detect the electrolyte at the bottom of the second spray tower 22, thereby enabling the detection of the pH value of the oxidized electrolyte.

[0061] Optionally, the primary cell electrolysis device 44 is a device that uses electrical energy to drive a non-spontaneous oxidation-reduction reaction. Its main function is to electrolyze water to form oxidizing hydroxyl ions, thereby oxidizing organic pollutants in the exhaust gas and purifying it. An electrolysis device with water electrolysis function can be directly selected; its specific structure will not be described in detail here.

[0062] The second spray pipeline 42 includes a second main pipeline 421 and several second branch pipelines 422. The second main pipeline 421 is connected to the second water tank 41, and the several second branch pipelines 422 are all connected to the second main pipeline 421. The several second branch pipelines 422 are arranged sequentially and at intervals from the top to the bottom of the second spray tower 22, and each second branch pipeline 422 is equipped with several second spray nozzles 423. When the second circulating pump 43 is turned on, the electrolyte in the second water tank 41 is distributed to each of the second branch pipelines 422 through the second main pipeline 421, and then sprayed out through each of the second spray nozzles 423 to achieve oxidation treatment of the exhaust gas. Furthermore, the sequential and interval arrangement of the second branch pipelines 422 from the top to the bottom of the second spray tower 22 allows for spraying at various locations in the oxidation process, thereby increasing the oxidation treatment area and the oxidation treatment effect.

[0063] Preferably, in this embodiment, multiple second branch pipes 422 and multiple second spray nozzles 423 are provided, so that they cover all positions within the second spray tower 22, thereby improving the oxidation treatment effect.

[0064] Furthermore, the sludge low-temperature drying exhaust gas treatment device also includes a control unit. A pH sensor 50, a first circulation pump 33, a second circulation pump 43, and a galvanic cell electrolysis device 44 are all electrically connected to the control unit. By collecting data from the pH sensor 50, the control unit can control the operating power of the galvanic cell electrolysis device 44, thereby achieving complete purification of the exhaust gas. In addition, the control unit can also control the opening levels of the first circulation pump 33 and the second circulation pump 43 to adjust the spray water volume. This simplifies the operation for personnel and enhances the convenience of equipment operation.

[0065] It is understood that the control unit is a PLC (Power Line Communication) control cabinet, which can realize the acquisition of the above-mentioned detection data and the control of the first circulation pump 33, the second circulation pump 43, and the galvanic cell electrolysis device 44. Its internal structure and control principle are existing technologies and will not be described in detail here. Of course, in other embodiments, the control unit may also adopt other structures.

[0066] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A sludge low-temperature drying tail gas treatment device, characterized in that, include: The dehumidifying fan (10) can be connected to the exhaust gas output pipe of the low-temperature drying equipment, and the dehumidifying fan (10) is used to dehumidify the exhaust gas; An integrated spray tower (20) is located downstream of the exhaust fan (10). The integrated spray tower (20) is used to sequentially remove dust and oxidize the exhaust gas. A pH sensor (50) is installed in the integrated spray tower (20) and is used to detect the pH value of the liquid after oxidation treatment.

2. The sludge low-temperature drying tail gas treatment device according to claim 1, characterized in that, The integrated spray tower (20) includes: The first spray tower (21) is used to spray water to remove dust from the exhaust gas; The second spray tower (22) is located downstream of the first spray tower (21). The second spray tower (22) is used to spray electrolyte to oxidize the tail gas. The pH detection element (50) is located inside the second spray tower (22) and is used to detect the pH value of the electrolyte.

3. The sludge low-temperature drying tail gas treatment device according to claim 2, characterized in that, The integrated spray tower (20) includes an inlet pipe (23) and an outlet pipe (24). The inlet pipe (23) is located at the top of the first spray tower (21) and is connected to the exhaust fan (10). The outlet pipe (24) is located at the top of the second spray tower (22) and is connected to the chimney (60). The first spray tower (21) and the second spray tower (22) are connected.

4. The sludge low-temperature drying tail gas treatment device according to claim 3, characterized in that, A connecting pipe (25) is provided between the first spray tower (21) and the second spray tower (22). One end of the connecting pipe (25) is connected to the side wall of the first spray tower (21) near the bottom, and the other end is connected to the side wall of the second spray tower (22) near the bottom.

5. The sludge low-temperature drying tail gas treatment device according to claim 2, characterized in that, The first spray tower (21) is equipped with a first circulating spray system, in which water circulates.

6. The sludge low-temperature drying tail gas treatment device according to claim 5, characterized in that, The first circulating spray system includes: The first water tank (31) is used to store water, and the first water tank (31) is connected to the first spray tower (21) to collect the liquid after spraying; The first spray pipe (32) has an inlet connected to the first water tank (31) and an outlet located inside the first spray tower (21), and is provided with a plurality of first spray nozzles (323), which are used for spraying water; The first circulation pump (33) is installed on the first spray pipe (32) and is used to transport water from the first water tank (31) to the first spray pipe (32).

7. The sludge low-temperature drying tail gas treatment device according to claim 6, characterized in that, The first spray pipeline (32) includes a first main pipeline (321) and a plurality of first branch pipelines (322). The first main pipeline (321) is connected to the first water tank (31), and the plurality of first branch pipelines (322) are all connected to the first main pipeline (321). The plurality of first branch pipelines (322) are arranged sequentially from the top to the bottom of the first spray tower (21) at intervals. The first branch pipelines (322) are provided with a plurality of first spray nozzles (323).

8. The sludge low-temperature drying tail gas treatment device according to claim 2, characterized in that, The second spray tower (22) is equipped with a second circulating spray system, in which electrolyte is circulated.

9. The sludge low-temperature drying tail gas treatment device according to claim 8, characterized in that, The second circulating spray system includes: The second water tank (41) is used to store electrolyte, and the second water tank (41) is connected to the first spray tower (21) to collect the liquid after spraying; the pH detection device (50) is installed on the second water tank (41) to detect the pH value of the electrolyte in the second water tank (41); A primary battery electrolysis device (44) is disposed on one side of the second water tank (41). The primary battery electrolysis device (44) is used to electrolyze the water in the second water tank (41) to form an electrolyte. The second spray pipe (42) has an inlet connected to the second water tank (41) and an outlet located inside the second spray tower (22), and is provided with several second spray nozzles (423), which are used to spray electrolyte; The second circulation pump (43) is installed on the second spray pipeline (42) and is used to transport the electrolyte of the second water tank (41) to the second spray pipeline (42).

10. The sludge low-temperature drying tail gas treatment device according to claim 9, characterized in that, The second spray pipeline (42) includes a second main pipeline (421) and several second branch pipelines (422). The second main pipeline (421) is connected to the second water tank (41), and several second branch pipelines (422) are all connected to the second main pipeline (421). Several second branch pipelines (422) are arranged sequentially from the top to the bottom of the second spray tower (22). Several second spray nozzles (423) are provided on the second branch pipelines (422).

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