Efficient denitrification sewage treatment device and use method thereof

Abstract

The invention provides an efficient denitrification sewage treatment device and a use method, the efficient denitrification sewage treatment device comprises a treatment tank, the top of the treatment tank is detachably provided with a top cover, the bottom of the treatment tank is vertically and rotatably provided with a stirring shaft, the stirring shaft is provided with stirring blades, and the top cover is provided with a connecting shaft capable of vertically lifting; a plurality of stirring rings are arranged on the outer sides of the stirring blades in a sleeving manner, a plurality of stirring shafts are arranged on the stirring rings, and a connecting cross rod is arranged between the stirring ring on the uppermost side and the connecting shaft. According to the efficient denitrification sewage treatment device and the use method, the stirring treatment on the mixture of the denitrification agent and the sewage can be met, so that the basic requirement on the denitrification treatment on the sewage is met, and the sewage can be efficiently denitrified in a manner of combining a horizontal stirring structure and a vertical stirring structure. A mixture of the denitrification agent and the sewage is quickly and efficiently stirred, so that the sewage treatment effect and the sewage treatment efficiency are improved.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and specifically relates to a high-efficiency denitrification wastewater treatment device and its usage method. Background Technology

[0002] Currently, biological denitrification is one of the most widely used nitrogen removal technologies. It primarily removes total nitrogen by using denitrifying bacteria to reduce nitrates or nitrites to nitrogen gas under anaerobic conditions. During this process, an external carbon source (i.e., denitrifying agent) is usually added to provide electron donors and ensure the smooth progress of the denitrification reaction. Existing wastewater treatment plants generally use mechanical stirring to promote the mixing of denitrifying agents and wastewater, thereby improving reaction efficiency.

[0003] However, traditional mixing structures have significant technical drawbacks: their mixing units are mostly fixed, allowing only horizontal mixing within a localized area and lacking vertical movement capabilities, thus limiting the mixing range; simultaneously, the single mixing method makes it difficult to achieve uniform diffusion of reagents within the reaction tank, easily creating concentration gradients that affect the sufficiency and stability of the denitrification reaction. Furthermore, when treating high-concentration or high-flow-rate wastewater, such devices often exhibit low mass transfer efficiency, uneven mixing, and unstable nitrogen removal effects, failing to meet high-standard effluent requirements.

[0004] Therefore, there is still a lack of a denitrification treatment device in the existing technology that can achieve efficient and uniform mixing of denitrification agents, has a large stirring coverage area, and is highly adaptable. Summary of the Invention

[0005] In view of this, the present invention addresses the shortcomings of the prior art by providing a highly efficient denitrification wastewater treatment device and its usage method. This device not only meets the basic requirement of denitrification treatment by stirring the mixture of denitrification agents and wastewater, but also rapidly and efficiently stirs the mixture of denitrification agents and wastewater through a combination of horizontal and vertical stirring structures, thereby improving the wastewater treatment effect and efficiency.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a high-efficiency denitrification wastewater treatment device, including a treatment tank, a top cover detachably provided on the top of the treatment tank, a stirring shaft vertically rotatably provided at the bottom of the treatment tank, stirring blades provided on the stirring shaft, a connecting shaft capable of vertical lifting and lowering provided on the top cover, multiple stirring rings sleeved on the outer side of the stirring blades, multiple stirring shafts provided on the multiple stirring rings, and a connecting crossbar provided between the uppermost stirring ring and the connecting shaft.

[0007] As a further improvement of the present invention, a drive motor is provided at the bottom of the processing tank, and the output shaft of the drive motor and the stirring shaft are connected by a gear transmission assembly to achieve power transmission.

[0008] As a further improvement of the present invention, a fixed frame is provided on the top cover, and a telescopic push rod is vertically installed on the fixed frame; the output end of the telescopic push rod is connected to a horizontal plate, and the bottom end of the horizontal plate is fixedly connected to the top end of the connecting shaft; a connecting sleeve is also provided on the side of the horizontal plate, and the connecting sleeve slides vertically with the side wall of the fixed frame.

[0009] As a further improvement of the present invention, the bottom of the treatment tank is provided with a protective cover, which covers the outside of the drive motor, stirring shaft and gear transmission assembly; the top of the protective cover is provided with a pressure washer; the side of the protective cover is provided with a fixing plate, and the fixing plate is provided with fixing bolts for screwing into the threaded fixing holes at the bottom of the treatment tank to achieve sealing and fixing.

[0010] As a further improvement of the present invention, an electric heating device is provided on the inner wall of the processing tank, and a temperature sensor is embedded in the inner wall of the processing tank; a feeding hopper is provided on the top cover, and a first control valve is provided on the feeding hopper; a discharge pipe and a support leg are provided at the bottom of the processing tank, and a second control valve is provided on the discharge pipe; an exhaust valve and a pressure sensor are also provided on the top cover, which are used to monitor and adjust the air pressure inside the tank during closed operation to prevent safety risks caused by gas accumulation.

[0011] As a further improvement of the present invention, a reinforcing inclined rod is provided between the connecting shaft and the uppermost stirring ring; a scraper is also provided on the stirring shaft for scraping and cleaning the material adhering to the inner wall of the bottom of the processing tank, and a scraper ring is also provided on the side end of the stirring ring for scraping and cleaning the material adhering to the inner wall of the side end of the processing tank.

[0012] As a further improvement of the present invention, a guide tube is vertically provided through the top cover, and a guide rod that is inserted into the guide tube is vertically provided on the uppermost stirring ring.

[0013] As a further improvement of the present invention, the top cover is snapped into the upper end of the treatment tank, and the top cover is also provided with connecting bolts for screwing the treatment tank, and the treatment tank is provided with threaded connection holes for screwing the connecting bolts.

[0014] As a further improvement of the present invention, a total nitrogen sensor is embedded in the inner wall of the bottom of the treatment tank for real-time online detection of the total nitrogen content in the treated wastewater; a dissolved oxygen detector is embedded in the inner side wall of the bottom of the treatment tank for monitoring the dissolved oxygen value in the reaction zone to determine whether the denitrification process is in an anoxic state; a data acquisition device is provided on the outer side wall of the treatment tank, which is electrically connected to the total nitrogen sensor, the dissolved oxygen detector, and the pressure sensor; a control display screen is also provided on the outer side wall, which is electrically connected to the temperature sensor, the data acquisition device, the drive motor, the telescopic push rod, the first control valve, the second control valve, the exhaust valve, the pressure sensor, and the electric heating device to achieve centralized monitoring and intelligent control.

[0015] A method for using a high-efficiency denitrification wastewater treatment device includes the following steps: S1, open the first control valve and feed the wastewater to be treated and denitrification agent into the treatment tank through the feed hopper; close the first control valve after feeding is completed. S2, start the drive motor, drive the stirring shaft and stirring blades to rotate through the gear transmission assembly, and perform preliminary mixing of wastewater; at the same time, start the telescopic push rod, drive the connecting shaft to move vertically, and drive multiple stirring rings to move up and down reciprocally through the connecting crossbar, so that the stirring shaft can achieve longitudinal disturbance while rotating, and enhance the mass transfer efficiency of the reaction zone. S3 monitors the DO value in the lower part of the reaction zone in real time through a dissolved oxygen detector. When the DO concentration is higher than the set threshold, the aeration is adjusted or the amount of carbon source added is increased to maintain the anoxic environment required for denitrification. The scraper and scraper ring rotate synchronously with the stirring shaft to remove the deposits attached to the bottom and wall of the tank, respectively, to prevent clogging and improve the heat and mass transfer effect. S4, the total nitrogen sensor continuously monitors the total nitrogen content at the outlet water. The data acquisition unit receives signals from the total nitrogen sensor, dissolved oxygen detector and pressure sensor, and transmits them to the control display screen for visual display. If the total nitrogen concentration does not meet the standard, the reaction time is extended or the stirring parameters are adjusted. S5, the gas generated during the reaction is automatically released through the exhaust valve. The pressure sensor monitors the gas pressure change in the tank in real time. When the preset upper limit is reached, the exhaust mechanism is triggered to avoid the risk of overpressure. S6. After the reaction is complete, open the second control valve to discharge the treated wastewater through the discharge pipe; after emptying, cleaning and maintenance can be carried out.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: Firstly, by combining a horizontal stirring structure (stirring shaft and stirring blades) with a vertical stirring structure (connecting shaft, stirring ring, and stirring shaft), three-dimensional stirring of the mixture of wastewater and denitrification agents is achieved. This composite stirring method significantly enhances the mass transfer efficiency within the reaction zone, ensuring full contact between the agents and wastewater, and improving the denitrification reaction rate and denitrification efficiency.

[0017] Secondly, the device integrates multiple sensors (such as a total nitrogen sensor, dissolved oxygen detector, pressure sensor, and temperature sensor), combined with a data acquisition unit and control display screen, to achieve real-time monitoring and intelligent control of key parameters during the processing. The system can automatically adjust operations such as stirring, heating, and venting based on feedback, ensuring the reaction proceeds under optimal conditions and improving processing stability and safety.

[0018] Thirdly, the stirring shaft is equipped with a scraper, and the side of the stirring ring is equipped with a scraper ring. During the stirring process, the deposits attached to the bottom and wall of the tank can be removed simultaneously, which can effectively prevent material accumulation and the formation of local dead corners. This not only improves the heat and mass transfer efficiency, but also reduces the difficulty of cleaning the equipment and extends the service life of the equipment.

[0019] Fourth, the top of the treatment tank is equipped with a detachable top cover, which is fixed by connecting bolts for easy maintenance and cleaning; the bottom is equipped with a protective cover and is sealed by fixing bolts to protect the drive motor and transmission components from contamination; at the same time, it is equipped with pressure gaskets and fixing ring plates to ensure that the overall structure is sealed and reliable, and is suitable for closed pressurized operation scenarios.

[0020] Fifth, it is equipped with an exhaust valve and pressure sensor linkage mechanism. When the gas pressure inside the tank reaches the preset upper limit, it can automatically open the exhaust valve to avoid the risk of overpressure caused by gas accumulation and ensure the safe operation of the equipment.

[0021] Sixth, the inner wall of the treatment tank is equipped with an electric heating device and a temperature sensor, which can maintain a suitable reaction temperature in a low-temperature environment. This is especially beneficial for maintaining the activity of temperature-sensitive denitrifying bacteria in cold seasons, thereby further improving the denitrification efficiency.

[0022] Seventh, wastewater and chemicals are added through the feed hopper, and the discharge pipe controls the liquid discharge. The process is managed in a closed loop with the first and second control valves. The reaction time or process parameters can be dynamically adjusted according to the total nitrogen test results to ensure that the effluent quality meets the standards. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the processing tank, stirring shaft, stirring blades, temperature sensor, total nitrogen sensor, and dissolved oxygen detector of the present invention; Figure 3 This is a schematic diagram of the structure of the stirring shaft, stirring blades, connecting shaft, stirring ring, stirring shaft, connecting crossbar, reinforcing inclined bar, scraper plate and scraper ring of the present invention; Figure 4This is a schematic diagram of the protective cover, compression washer, fixing plate, and fixing bolt of the present invention. Figure 5 This is a schematic diagram of the structure of the guide cylinder and guide rod of the present invention.

[0025] In the diagram: 101. Processing tank; 102. Top cover; 103. Stirring shaft; 104. Stirring blades; 105. Connecting shaft; 106. Agitating ring; 107. Stirring shaft; 108. Connecting crossbar; 109. Temperature sensor; 110. Feed hopper; 111. First control valve; 112. Discharge pipe; 113. Support leg; 114. Second control valve; 115. Exhaust valve; 116. Pressure sensor; 117. Reinforcing brace; 118. Scraper; 11 9. Scraper ring; 201. Drive motor; 202. Gear transmission assembly; 203. Protective cover; 204. Pressure washer; 205. Fixing ring plate; 206. Fixing bolt; 301. Fixing frame; 302. Telescopic push rod; 303. Horizontal plate; 304. Connecting sleeve; 401. Guide tube; 402. Guide rod; 403. Connecting bolt; 404. Total nitrogen sensor; 405. Dissolved oxygen detector; 406. Extension plate; 407. Anchor bolt. Detailed Implementation

[0026] To better understand the present invention, the following embodiments further illustrate the content of the invention, but the scope of protection of the present invention is not limited to the following embodiments. Numerous specific details are set forth in the following description to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details.

[0027] like Figure 1 , 2 As shown in Figures 3 and 5, a high-efficiency denitrification wastewater treatment device includes a treatment tank 101. A top cover 102 is detachably provided on the top of the treatment tank 101. A stirring shaft 103 is vertically rotatably provided on the bottom of the treatment tank 101. A stirring blade 104 is provided on the stirring shaft 103. A connecting shaft 105 capable of vertical lifting is provided on the top cover 102. Multiple stirring rings 106 are sleeved on the outer side of the stirring blades 104. Multiple stirring shafts 107 are provided on the multiple stirring rings 106. A connecting crossbar 108 is provided between the uppermost stirring ring 106 and the connecting shaft 105.

[0028] like Figure 1 As shown, a drive motor 201 is provided at the bottom of the processing tank 101, and the output shaft of the drive motor 201 and the stirring shaft 103 are connected by a gear transmission assembly 202 to achieve power transmission.

[0029] like Figure 1As shown, a fixed frame 301 is provided on the top cover 102, and a telescopic push rod 302 is vertically installed on the fixed frame 301; the output end of the telescopic push rod 302 is connected to a horizontal plate 303, and the bottom end of the horizontal plate 303 is fixedly connected to the top end of the connecting shaft 105; a connecting sleeve 304 is also provided on the side of the horizontal plate 303, and the connecting sleeve 304 slides vertically with the side wall of the fixed frame 301.

[0030] like Figure 1 , 2 As shown, an electric heating device is installed on the inner wall of the processing tank 101, and a temperature sensor 109 is embedded in the inner wall of the processing tank 101; a feed hopper 110 is provided on the top cover 102, and a first control valve 111 is provided on the feed hopper 110; a discharge pipe 112 and a support leg 113 are provided at the bottom of the processing tank 101, and a second control valve 114 is provided on the discharge pipe 112; an exhaust valve 115 and a pressure sensor 116 are also provided on the top cover 102, used to monitor and regulate the air pressure inside the tank during closed operation to prevent safety risks caused by gas accumulation. An extension plate 406 is also provided at the bottom side of the support leg 113, and an anchor bolt 407 for connecting to the ground is provided on the extension plate 406. Workers can pass the anchor bolt 407 through the extension plate 406 and connect it to the anchor threaded cylinder in the ground, thereby stably fixing the device to the ground.

[0031] like Figure 5 As shown, a guide tube 401 is vertically installed through the top cover 102, and a guide rod 402 that is inserted into the guide tube 401 is vertically installed on the uppermost stirring ring 106.

[0032] like Figure 1 As shown, the top cover 102 is snapped into the upper end of the treatment tank 101. The top cover 102 is also provided with a connecting bolt 403 for screwing the treatment tank 101. The treatment tank 101 is provided with a threaded connection hole for screwing the connecting bolt 403.

[0033] like Figure 2 As shown, a total nitrogen sensor 404 is embedded in the inner wall of the bottom of the treatment tank 101 for real-time online detection of the total nitrogen content in the treated wastewater; a dissolved oxygen detector 405 is embedded in the inner side wall of the bottom of the treatment tank 101 for monitoring the dissolved oxygen value in the reaction zone to determine whether the denitrification process is in an anoxic state; a data acquisition device is provided on the outer side wall of the treatment tank 101, which is electrically connected to the total nitrogen sensor 404, the dissolved oxygen detector 405, and the pressure sensor 116; a control display screen is also provided on the outer side wall, which is electrically connected to the temperature sensor 109, the data acquisition device, the drive motor 201, the telescopic push rod 302, the first control valve 111, the second control valve 114, the exhaust valve 115, the pressure sensor 116, and the electric heating device to achieve centralized monitoring and intelligent control.

[0034] Workers can first open the first control valve 111, then inject the wastewater to be treated into the treatment tank 101 through the feed hopper 110, add a certain amount of denitrification agent to the treatment tank 101, and close the first control valve 111 after the feeding is completed.

[0035] During operation, the exhaust valve 115 can be closed to keep the processing tank 101 in a closed operating state; the pressure sensor 116 can then monitor the air pressure inside the tank in real time, and if the pressure is too high, it will automatically open the exhaust valve 115 to release pressure and ensure operational safety.

[0036] Then, the drive motor 201 is started, which drives the stirring shaft 103 to rotate through the gear transmission assembly 202, thereby driving the stirring blades 104 to rotate and mix the wastewater and denitrification agent. At the same time, the telescopic push rod 302 is activated, pushing the horizontal plate 303 to move up and down, driving the connecting shaft 105 and multiple stirring rings 106 and stirring shaft 107 to achieve vertical lifting and lowering movement. During this process, the guide tube 401 cooperates with the guide rod 402 to ensure that the connecting shaft 105 remains vertically stable during the lifting and lowering process and prevents deviation. The vertical sliding cooperation between the connecting sleeve 304 and the fixed frame 301 can enhance the guidance and stability of the horizontal plate 303 movement, thereby lifting and stirring the mixture of wastewater and denitrification agent to further improve mass transfer efficiency and promote the denitrification reaction.

[0037] The dissolved oxygen detector 405 monitors the dissolved oxygen concentration in the lower part of the reaction zone in real time to ensure that the environment is maintained in an anoxic state, which is conducive to the reduction of nitrates to nitrogen by denitrifying bacteria. The total nitrogen sensor 404 detects the total nitrogen content in the treated wastewater online. The data acquisition device collects and transmits the data to the control display screen to realize the real-time evaluation of denitrification efficiency. The temperature sensor 109 is used to detect the temperature inside the treatment tank 101. When the temperature is lower than the set value, the control display screen starts the electric heating device to heat and maintain a suitable reaction temperature.

[0038] The control display screen automatically adjusts parameters such as the frequency of the electric heating device, the telescopic push rod 302, the stirring time, and the valve opening and closing based on data feedback from various sensors to optimize the processing. When the total nitrogen content reaches the emission standard and the reaction is complete, the second control valve 114 opens, and the treated water is discharged from the outlet pipe 112. After emptying, cleaning and maintenance can be performed to prepare for the next batch of treatment.

[0039] According to another embodiment of the invention, such as Figure 4As shown, the bottom of the processing tank 101 is provided with a protective cover 203, which covers the drive motor 201, the stirring shaft 103, and the gear transmission assembly 202. The top of the protective cover 203 is provided with a pressure washer 204. The side of the protective cover 203 is provided with a fixing ring plate 205, and the fixing ring plate 205 is provided with fixing bolts 206 for screwing into the threaded fixing holes at the bottom of the processing tank 101 to achieve a sealed fixation. The user can cover the drive motor 201, the stirring shaft 103, and the gear transmission assembly 202 with the protective cover 203, and make the fixing bolts 206 pass through the side wall of the fixing ring plate 205 and screw into the threaded fixing holes, thereby fixing the protective cover 203 to the bottom of the processing tank 101 and protecting the drive motor 201, the stirring shaft 103, and the gear transmission assembly 202. The pressure washer 204 can improve the sealing performance at the connection between the protective cover 203 and the processing tank 101.

[0040] According to another embodiment of the invention, such as Figure 3 As shown, a reinforcing brace 117 is also provided between the connecting shaft 105 and the uppermost stirring ring 106. The reinforcing brace 117 added between the connecting shaft 105 and the uppermost stirring ring 106 enhances the rigidity and stability of the connection between the two, avoids loosening or fatigue damage due to long-term reciprocating motion, and ensures that the lifting action is smoothly transmitted to the entire stirring system.

[0041] The stirring shaft 103 is also equipped with a scraper 118 for scraping and cleaning materials adhering to the inner wall of the bottom of the treatment tank 101, and the side end of the stirring ring 106 is also equipped with a scraper ring 119 for scraping and cleaning materials adhering to the inner wall of the side end of the treatment tank 101. When the stirring shaft 103 rotates, it drives the scraper 118 at its bottom to rotate synchronously, effectively removing the sediment or scale adhering to the inner wall of the bottom of the treatment tank 101, preventing material accumulation from affecting heating efficiency and reaction uniformity; during the vertical lifting and lowering process, the stirring ring 106 can drive the scraper ring 119 to move vertically up and down, scraping and cleaning the materials adhering to the inner wall of the side end of the treatment tank 101. The scraper 118 and scraper ring 119 continue to play a role in each operation, reducing the frequency of manual cleaning after shutdown, improving the continuous operation capability of the device, and is suitable for long-term treatment scenarios of high-concentration, easily scaled wastewater.

[0042] A method for using a high-efficiency denitrification wastewater treatment device includes the following steps: S1, open the first control valve 111, and feed the wastewater to be treated and denitrification agent into the treatment tank 101 through the feed hopper 110; after feeding is completed, close the first control valve 111. S2, start the drive motor 201, drive the stirring shaft 103 and stirring blades 104 to rotate through the gear transmission assembly 202, and perform preliminary mixing of sewage; at the same time, start the telescopic push rod 302, drive the connecting shaft 105 to move vertically, and drive multiple stirring rings 106 to move up and down reciprocally through the connecting crossbar 108, so that the stirring shaft 107 can achieve longitudinal disturbance while rotating, and enhance the mass transfer efficiency of the reaction zone. S3, the dissolved oxygen detector 405 monitors the DO value in the lower part of the reaction zone in real time. When the DO concentration is higher than the set threshold, the aeration is adjusted or the carbon source dosage is increased to maintain the anoxic environment required for denitrification. The scraper 118 and scraper ring 119 rotate synchronously with the stirring shaft 103 to remove the deposits attached to the bottom and wall of the tank, respectively, to prevent clogging and improve the heat and mass transfer effect. S4, the total nitrogen sensor 404 continuously detects the total nitrogen content at the outlet water. The data acquisition unit receives signals from the total nitrogen sensor 404, dissolved oxygen detector 405 and pressure sensor 116, and transmits them to the control display screen for visual display. If the total nitrogen concentration does not meet the standard, the reaction time is extended or the stirring parameters are adjusted. S5, the gas generated during the reaction is automatically released through the exhaust valve 115, and the pressure sensor 116 monitors the gas pressure change in the tank in real time. When the preset upper limit is reached, the exhaust mechanism is triggered to avoid the risk of overpressure. S6. After the reaction is complete, open the second control valve 114 to discharge the treated wastewater through the discharge pipe 112; after emptying, cleaning and maintenance can be carried out.

[0043] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-efficiency denitrification wastewater treatment device, comprising a treatment tank (101), characterized in that: The top of the processing tank (101) is detachably provided with a top cover (102), and the bottom of the processing tank (101) is provided with a vertically rotatable stirring shaft (103). The stirring shaft (103) is provided with stirring blades (104), and the top cover (102) is provided with a connecting shaft (105) that can be vertically raised and lowered. Multiple stirring rings (106) are sleeved on the outside of the stirring blades (104), and multiple stirring shafts (107) are provided on the multiple stirring rings (106). A connecting crossbar (108) is provided between the uppermost stirring ring (106) and the connecting shaft (105).

2. The high-efficiency denitrification wastewater treatment device as described in claim 1, characterized in that: The bottom of the processing tank (101) is provided with a drive motor (201), and the output shaft of the drive motor (201) and the stirring shaft (103) are connected by a gear transmission assembly (202) to achieve power transmission.

3. The high-efficiency denitrification wastewater treatment device as described in claim 1, characterized in that: The top cover (102) is provided with a fixed frame (301), and a telescopic push rod (302) is vertically installed on the fixed frame (301); the output end of the telescopic push rod (302) is connected to a horizontal plate (303), and the bottom end of the horizontal plate (303) is fixedly connected to the top end of the connecting shaft (105); the side of the horizontal plate (303) is also provided with a connecting sleeve (304), and the connecting sleeve (304) slides vertically with the side wall of the fixed frame (301).

4. The high-efficiency denitrification wastewater treatment device as described in claim 2, characterized in that: The bottom of the treatment tank (101) is provided with a protective cover (203), which covers the outside of the drive motor (201), the stirring shaft (103) and the gear transmission assembly (202); the top of the protective cover (203) is provided with a pressure washer (204); the side of the protective cover (203) is provided with a fixing ring plate (205), and the fixing ring plate (205) is provided with fixing bolts (206) for screwing into the threaded fixing holes at the bottom of the treatment tank (101) to achieve sealing and fixing.

5. The high-efficiency denitrification wastewater treatment device as described in claim 1, characterized in that: An electric heating device is provided on the inner wall of the processing tank (101), and a temperature sensor (109) is embedded in the inner wall of the processing tank (101); a feed hopper (110) is provided on the top cover (102), and a first control valve (111) is provided on the feed hopper (110); a discharge pipe (112) and a support leg (113) are provided at the bottom of the processing tank (101), and a second control valve (114) is provided on the discharge pipe (112); an exhaust valve (115) and a pressure sensor (116) are also provided on the top cover (102) to monitor and adjust the gas pressure inside the tank during closed operation to prevent safety risks caused by gas accumulation.

6. The high-efficiency denitrification wastewater treatment device as described in claim 1, characterized in that: A reinforcing inclined rod (117) is also provided between the connecting shaft (105) and the uppermost stirring ring (106); a scraper plate (118) for scraping and cleaning the material adhering to the bottom inner wall of the processing tank (101) is also provided on the stirring shaft (103), and a scraper ring (119) for scraping and cleaning the material adhering to the side inner wall of the processing tank (101) is also provided on the side end of the stirring ring (106).

7. The high-efficiency denitrification wastewater treatment device as described in claim 1, characterized in that: A guide tube (401) is vertically inserted through the top cover (102), and a guide rod (402) that is inserted into the guide tube (401) is vertically installed on the uppermost stirring ring (106).

8. The high-efficiency denitrification wastewater treatment device as described in claim 1, characterized in that: The top cover (102) is snapped into the upper end of the treatment tank (101). The top cover (102) is also provided with a connecting bolt (403) for screwing the treatment tank (101). The treatment tank (101) is provided with a threaded connection hole for screwing the connecting bolt (403).

9. The high-efficiency denitrification wastewater treatment device as described in claim 1, characterized in that: The bottom inner wall of the treatment tank (101) is equipped with a total nitrogen sensor (404) for real-time online detection of the total nitrogen content in the treated wastewater; the inner side wall of the bottom of the treatment tank (101) is equipped with a dissolved oxygen detector (405) for monitoring the dissolved oxygen value in the reaction zone to determine whether the denitrification process is in an anoxic state; the outer side wall of the treatment tank (101) is equipped with a data acquisition device, which is electrically connected to the total nitrogen sensor (404), the dissolved oxygen detector (405) and the pressure sensor (116); the outer side wall is also equipped with a control display screen, which is electrically connected to the temperature sensor (109), the data acquisition device, the drive motor (201), the telescopic push rod (302), the first control valve (111), the second control valve (114), the exhaust valve (115), the pressure sensor (116) and the electric heating device to realize centralized monitoring and intelligent control.

10. A method of using the high-efficiency denitrification wastewater treatment device as described in claim 9, characterized in that: Includes the following steps: S1, open the first control valve (111) and feed the wastewater to be treated and denitrification agent into the treatment tank (101) through the feed hopper (110); after feeding is completed, close the first control valve (111); S2, start the drive motor (201), drive the stirring shaft (103) and stirring blades (104) to rotate through the gear transmission assembly (202) to initially mix the sewage; at the same time, start the telescopic push rod (302) to drive the connecting shaft (105) to move vertically, and drive multiple stirring rings (106) to move up and down through the connecting crossbar (108), so that the stirring shaft (107) can achieve longitudinal disturbance while rotating, thereby enhancing the mass transfer efficiency of the reaction zone; S3, the dissolved oxygen detector (405) monitors the DO value in the lower part of the reaction zone in real time. When the DO concentration is higher than the set threshold, the aeration is adjusted or the carbon source dosage is increased to maintain the anoxic environment required for denitrification. The scraper (118) and scraper ring (119) rotate synchronously with the stirring shaft (103) to remove the deposits attached to the bottom and wall of the tank, respectively, to prevent blockage and improve the heat and mass transfer effect. S4, the total nitrogen sensor (404) continuously detects the total nitrogen content at the outlet water. The data acquisition unit receives signals from the total nitrogen sensor (404), dissolved oxygen detector (405) and pressure sensor (116) and transmits them to the control display screen for visual display. If the total nitrogen concentration does not meet the standard, the reaction time is extended or the stirring parameters are adjusted. S5, the gas generated during the reaction is automatically released through the exhaust valve (115), and the pressure sensor (116) monitors the gas pressure change in the tank in real time. When the preset upper limit is reached, the exhaust mechanism is triggered to avoid the risk of overpressure. S6. After the reaction is completed, open the second control valve (114) to discharge the treated wastewater through the discharge pipe (112); after emptying, cleaning and maintenance can be carried out.

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