A sewage treatment apparatus

Abstract

The utility model discloses a sewage treatment device, including sewage treatment pond, sewage treatment pond is provided with water inlet and water outlet, and the sewage treatment pond is installed with the processing cylinder, and the upper end and the lower end of processing cylinder are all open, and the bottom of sewage treatment pond is provided with the inside aeration system of pond, and the inside aeration system of pond includes horizontal aeration pipe and vertical aeration pipe, and vertical aeration pipe one -to -one corresponding from below stretches into the inside of processing cylinder, horizontal aeration pipe links to each other with aeration main pipe, and aeration main pipe is connected with aeration fan, and the upper portion of sewage treatment pond is provided with the water outlet water collecting tank, and the top of sewage treatment pond is provided with the upper cover of the upper mouth of being covered with, and is provided with the air outlet on the upper cover, and the air outlet is provided with the air pipe, and the sewage treatment pond still is provided with sludge backflow system. The sewage treatment device can realize the sewage treatment process of anaerobic, anoxic and aerobic in a sewage treatment pond, and reduces the floor area.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a wastewater treatment device. Background Technology

[0002] Currently, the biological treatment stage of wastewater treatment plants mainly adopts the AAO activated sludge process. The anaerobic, anoxic, and aerobic activated sludge process is a wastewater treatment method that removes organic pollutants, nitrogen, phosphorus, and other minerals from water through various combinations of anaerobic, anoxic, and aerobic zones and different sludge return methods. Therefore, the biological treatment stage generally requires multiple treatment tanks, such as anaerobic, anoxic, and aerobic tanks. The anaerobic and anoxic tanks require agitators to ensure sludge suspension, while the aerobic stage uses air agitation to maintain sludge suspension.

[0003] The aforementioned treatment device has the following problems: 1. After aeration, the gas directly dissipates without fully utilizing the energy of the gas. At the same time, with the increasing environmental protection requirements, the biological tank needs to treat all the gas in the tank before discharge. Therefore, a cover is installed above the aerobic tank, and the cover is connected to the deodorization fan in the deodorization system. The deodorization fan draws air from the aerobic tank, collects it, and sends it to the treatment device for further treatment. At this time, since the aeration system needs the aeration fan to provide aeration, and the deodorization fan above needs to provide power, and the deodorization fan is generally designed with a large air volume and high negative pressure according to traditional design, the overall operating energy consumption is high.

[0004] 2. The current biological treatment section requires multiple treatment tanks, which occupy a large area. Furthermore, the anaerobic and anoxic tanks require additional stirring devices to ensure the suspension of sludge, so the overall cost is also very high.

[0005] 3. Current aeration systems are used outdoors for extended periods. The aeration blower draws air from the external environment into the aeration main pipe. Due to weather conditions, the outdoor environment has high humidity, which leads to condensation inside the aeration main pipe. This condensation needs to be drained promptly, but the current condensation drain outlets are equipped with manual valves, requiring manual drainage at regular intervals, which is complicated. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a sewage treatment device that can realize anaerobic, anoxic and aerobic sewage treatment processes in a sewage treatment tank, thereby reducing the floor space required.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is: a sewage treatment device, including a sewage treatment tank, the sewage treatment tank being provided with an inlet water distribution system and an outlet, and a plurality of treatment cylinders arranged in a rectangular array installed in the sewage treatment tank by fixed supports, the upper and lower ends of the treatment cylinders being open, the bottom of the sewage treatment tank being provided with an in-tank aeration system, the in-tank aeration system including horizontal aeration pipes and a plurality of vertical aeration pipes connected to the horizontal aeration pipes, the vertical aeration pipes extending one-to-one from below into the interior of the treatment cylinders; the horizontal aeration pipes being connected to a main aeration pipe outside the sewage treatment tank, the main aeration pipe being connected to an aeration blower, the upper part of the sewage treatment tank being provided with an outlet water collection tank connected to the outlet, the top opening of the sewage treatment tank being provided with a cover to seal the top opening, the cover being provided with an air outlet, the air outlet being provided with an air outlet pipe for connecting to an air purification system, and the sewage treatment tank also being provided with a sludge return system.

[0008] As a preferred embodiment, the fixing bracket includes a stainless steel mounting frame fixed to the side wall of the sewage treatment tank. The stainless steel mounting frame is provided with a plurality of mounting holes, and the outer wall of the treatment cylinder is provided with mounting ears. The treatment cylinder is inserted into the mounting holes and fixed to the stainless steel mounting frame by the mounting ears.

[0009] As a preferred embodiment, a pressure sensor is installed at the top of the wastewater treatment tank, a venturi tube is installed on the air outlet pipe, and an auxiliary air outlet pipe is connected to the air outlet of the aeration blower. The other end of the auxiliary air outlet pipe is connected to the neck inlet of the venturi tube.

[0010] As a preferred embodiment, the wastewater treatment tank is also equipped with several inlet distribution pipes located between adjacent discharge treatment cylinders. Each inlet distribution pipe is connected to the inlet water distribution system and has an outlet.

[0011] As a preferred embodiment, the number of water collection tanks is multiple and arranged in parallel, with one water collection tank between every two rows of treatment cylinders.

[0012] As a preferred embodiment, the aeration main pipe is inclined, and a drainage device for discharging condensate is provided at the lower end of the aeration main pipe.

[0013] As a preferred embodiment, the drainage device includes a butterfly valve located at the drain outlet at the bottom of the aeration main pipe. A passive operating rod is connected to the valve shaft of the butterfly valve. The drainage device also includes a cross-flow fan impeller, which rotates within the aeration main pipe via an impeller shaft. A support is provided inside the aeration main pipe, and the inner end of the impeller shaft is rotatably mounted on the support. The outer end of the impeller shaft passes through the aeration main pipe and protrudes. A driving pinion is fixed to the outer end of the impeller shaft. A base is fixed to the outside of the aeration main pipe, and a driven gear meshing with the driving pinion is rotatably mounted on the base. A driving pressure rod is fixedly mounted on the driven gear. The driving pressure rod drives the passive operating rod to elastically deflect around the center of the valve shaft via a linkage mechanism, thereby achieving intermittent opening and closing of the butterfly valve. The linkage mechanism includes a rotating sleeve located in the middle. A mounting plate is provided at the bottom of the aeration main pipe. The rotating sleeve is elastically mounted on the mounting plate by a spring. A first connecting rod and a second connecting rod are connected to the rotating sleeve. The first connecting rod and the second connecting rod form an included angle with each other. The first connecting rod cooperates with the active pressure rod. A force-applying sliding sleeve is provided at the end of the second connecting rod. The force-applying sliding sleeve is provided with a strip-shaped through hole extending along the length direction of the second connecting rod. The strip-shaped through hole is fitted onto the passive operating rod. The extension direction of the first connecting rod intersects with the active pressure rod. When the driven large gear rotates, it drives the active pressure rod to press down on the first connecting rod, forcing the first connecting rod to deflect around the center of the rotating sleeve. This causes the second connecting rod to deflect around the rotating sleeve, driving the passive operating rod to open the butterfly valve. When the first connecting rod deflects to the lowest position, it separates from the active pressure rod. Under the action of the spring, the second connecting rod drives the passive operating rod to deflect in the opposite direction, closing the butterfly valve.

[0014] As a preferred embodiment, the position where the first connecting rod and the active pressure rod are pressed together is set as the active pressing position, and the position where the second connecting rod and the passive operating rod are engaged together is set as the passive force application position. The distance between the active pressing position and the center of the rotating sleeve is greater than the distance between the passive force application position and the center of the rotating sleeve.

[0015] After adopting the above technical solution, the effect of this utility model is as follows: A sewage treatment device includes a sewage treatment tank, which is equipped with an inlet water distribution system and an outlet. Several treatment cylinders arranged in a rectangular array are installed inside the sewage treatment tank via fixed supports. The upper and lower ends of each treatment cylinder are open. An in-tank aeration system is provided at the bottom of the sewage treatment tank. The in-tank aeration system includes horizontal aeration pipes and several vertical aeration pipes connected to the horizontal aeration pipes. Each vertical aeration pipe extends one-to-one into the interior of the treatment cylinder from below. The horizontal aeration pipes are connected to the sewage treatment tank... The wastewater treatment tank is connected to an external aeration main pipe, which is connected to an aeration blower. An effluent collection trough connected to the outlet is located at the top of the wastewater treatment tank. A top cover is installed at the top opening of the wastewater treatment tank, and an air outlet is provided on the top cover. An air outlet pipe for connecting to an air purification system is installed at the air outlet. A sludge return system is also installed inside the wastewater treatment tank. Therefore, wastewater and sludge enter the wastewater treatment tank separately, and then the aeration blower supplies air to the tank. The gas enters the treatment cylinder through a vertical aeration pipe and moves upwards from the treatment cylinder. During this movement... The gas agitates the treatment tank, causing the wastewater inside to flow upwards, creating an airlift effect. As the gas flows upwards within the tank, wastewater from outside is fed in from the bottom, resulting in a continuous circulation of wastewater inside and outside each tank. Wastewater flowing in from outside is then lifted upwards by the gas, while the wastewater at the top flows downwards from outside, forming a cycle. During this circulation, the tank remains in an aerobic environment due to the continuous supply of gas, allowing aerobic bacteria in the sludge to process the wastewater. The gas then flows upwards from the top of the tank and ultimately enters the treatment process... The gas phase entering the wastewater treatment tank is an aerobic zone, where aerobic bacteria are active. As the wastewater circulates downwards from the top of the treatment tank to the bottom, its oxygen content gradually decreases, creating anoxic and anaerobic zones. Different functional microbial communities then function in these zones, achieving an AAO (anaerobic-aerobic) treatment process similar to conventional wastewater treatment. By controlling the wastewater inflow rate, the treatment time can be effectively controlled. Therefore, this scheme allows for anaerobic, aerobic, and anoxic treatment processes within a single wastewater tank. When the wastewater level exceeds the effluent collection tank, it flows out. During aeration, the gas continuously agitates the sludge, ensuring it remains suspended and allowing for thorough mixing and reaction between the sludge and water. The gas escaping from the wastewater into the gas phase space of the treatment tank then exits through the outlet and enters the air purification system for further processing.

[0016] This wastewater treatment device achieves anaerobic, aerobic, and anoxic treatment processes in a single wastewater treatment tank, which reduces the footprint. It also utilizes an aeration system for mixing, eliminating the need for conventional mechanical mixing structures, resulting in lower overall costs.

[0017] Furthermore, since the fixed support includes a stainless steel mounting frame fixed to the side wall of the sewage treatment tank, and the stainless steel mounting frame is provided with a number of mounting holes, and the outer wall of the treatment cylinder is provided with mounting ears, the treatment cylinder is inserted into the mounting holes and fixed to the stainless steel mounting frame through the mounting ears. Therefore, after the treatment cylinder is installed on the stainless steel mounting frame, the whole unit can be hoisted and fixed in the sewage treatment tank, which is convenient for cleaning and installation.

[0018] Furthermore, since a pressure sensor is installed at the top of the wastewater treatment tank, a Venturi tube is installed on the air outlet pipe, and an auxiliary air outlet pipe is connected to the air outlet of the aeration blower, with the other end of the auxiliary air outlet pipe connected to the neck inlet of the Venturi tube, the aeration blower blows gas out of the Venturi tube, thus creating the Venturi effect. This allows the gas in the gas phase of the wastewater treatment tank to be discharged smoothly. The pressure sensor can detect the air pressure in the wastewater treatment tank and guide the air output of the auxiliary air outlet pipe, thereby creating a slight negative pressure in the wastewater treatment tank and preventing the gas in the wastewater treatment tank from escaping from other parts.

[0019] Furthermore, since the sewage treatment tank is also equipped with several inlet distribution pipes located between adjacent treatment cylinders, and each inlet distribution pipe is connected to the inlet water distribution system and has an outlet, the inlet distribution pipes directly distribute the sewage to each treatment cylinder. In this way, the sewage is directly distributed into the sewage treatment tank, and each treatment cylinder can better share the sewage treatment task, avoiding the concentration of treatment capacity caused by single-point water inlet.

[0020] Furthermore, since the aeration main pipe is set at an incline, a drainage device for discharging condensate is provided at the lower end of the aeration main pipe. The drainage device includes a butterfly valve at the drain outlet at the bottom of the aeration main pipe, with a passive operating rod connected to the valve shaft of the butterfly valve. The drainage device also includes a cross-flow fan impeller, which rotates within the aeration main pipe via an impeller shaft. A support is provided inside the aeration main pipe, and the inner end of the impeller shaft is rotatably mounted on the support. The outer end of the impeller shaft passes through the aeration main pipe and protrudes. A driving pinion is fixed to the outer end of the impeller shaft, and a base is fixed to the outside of the aeration main pipe. A driven gear meshing with the driving pinion is rotatably mounted on the base, and a driving pressure rod is fixedly mounted on the driven gear. The driving pressure rod drives the passive operating rod to elastically deflect around the center of the valve shaft through a linkage mechanism to achieve intermittent opening and closing of the butterfly valve. The linkage mechanism includes a rotating sleeve located in the middle, and a mounting plate is provided at the bottom of the aeration main pipe. The rotating sleeve is elastically mounted on the mounting plate by a spring. A first connecting rod and a second connecting rod are connected to the rotating sleeve, forming an angle with each other. The first connecting rod cooperates with the active pressure rod. A force-applying sliding sleeve is provided at the end of the second connecting rod, and a strip-shaped through hole extending along the length of the second connecting rod is provided on the passive operating rod. The extension direction of the first connecting rod intersects with the active pressure rod. When the driven large gear rotates, it drives the active pressure rod to press down on the first connecting rod, forcing the first connecting rod to deflect around the center of the rotating sleeve. This causes the second connecting rod to deflect around the rotating sleeve, driving the passive operating rod to open the butterfly valve. When the first connecting rod deflects to its lowest position, it separates from the active pressure rod. Under the action of the spring, the second connecting rod drives the passive operating rod to deflect in the opposite direction, closing the butterfly valve. Therefore, the above-mentioned drainage device can utilize the airflow from the aeration main pipe to drive the intermittent opening of the butterfly valve, thus achieving automatic timed discharge of condensate and reducing manual labor intensity. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0023] Figure 2 This is a top view of the wastewater treatment tank of this utility model;

[0024] Figure 3 This is a schematic diagram of the processing principle of the processing cylinder;

[0025] Figure 4 This is the front view of the drainage system;

[0026] Figure 5 This is a side view of the drainage system;

[0027] In the attached diagram: 1. Wastewater treatment tank; 2. Treatment cylinder; 21. Mounting lug; 3. Fixed bracket; 4. Sludge return system; 5. Inlet distribution pipe; 6. Horizontal aeration pipe; 7. Vertical aeration pipe; 8. Air outlet pipe; 9. Aeration blower; 10. Drainage device; 101. Main aeration pipe; 102. Base; 103. Driving pinion; 104. Driven gear; 105. Connecting stud; 106. Driving pressure rod; 107 1. Sleeve; 107. Butterfly valve; 108. Passive operating lever; 109. Second connecting rod; 1091. Force-applying sliding sleeve; 1010. First connecting rod; 1011. Mounting plate; 1012. Rotating sleeve; 1013. Tension spring; 1014. Spring connecting column; 1015. Cross-flow fan impeller; 11. Auxiliary air outlet pipe; 12. Venturi tube; 13. Air pressure sensor; 14. Water outlet collection tank; 15. Main water outlet tank. Detailed Implementation

[0028] The present invention will be further described in detail below through specific embodiments.

[0029] like Figures 1 to 5 As shown, a sewage treatment device includes a sewage treatment tank 1, which is equipped with an inlet water distribution system and an outlet. Several treatment cylinders 2 arranged in a rectangular array are installed in the sewage treatment tank through a fixed bracket 3. The upper and lower ends of the treatment cylinders 2 are open.

[0030] like Figure 1 and Figure 2 As shown, the fixed bracket 3 includes a stainless steel mounting bracket fixed to the side wall of the sewage treatment tank 1. The stainless steel mounting bracket is made of 316 stainless steel and has several mounting holes. The outer wall of the treatment cylinder 2 is provided with mounting ears 21. The treatment cylinder 2 is inserted into the mounting holes and fixed to the stainless steel mounting bracket by the mounting ears 21, for example, by stainless steel bolts. At the same time, the treatment cylinder 2 can be made of stainless steel or plastic, with plastic being preferred, as this makes the overall weight lighter.

[0031] The bottom of the wastewater treatment tank 1 is equipped with an in-tank aeration system, which includes horizontal aeration pipes 6 and several vertical aeration pipes 7 connected to the horizontal aeration pipes 6. The vertical aeration pipes 7 extend one-to-one into the interior of the treatment cylinder 2 from below. Each treatment cylinder 2 corresponds to one vertical aeration pipe 7. The horizontal aeration pipes 6 are connected to the main aeration pipe outside the wastewater treatment tank 1. The main aeration pipe is connected to the aeration blower 9. The upper part of the wastewater treatment tank 1 is equipped with an effluent collection tank 14 connected to the effluent outlet. The top opening of the wastewater treatment tank 1 is equipped with a cover that seals the top opening. The cover is equipped with an air outlet, and the air outlet is equipped with an air outlet pipe 8 for connecting to the air purification system. The wastewater treatment tank 1 is also equipped with a sludge return system 4, which returns sludge from the secondary sedimentation tank at a 1:1 ratio.

[0032] like Figure 1 As shown, a pressure sensor 13 is installed at the top of the wastewater treatment tank 1, a Venturi tube 12 is installed on the air outlet pipe 8, and an auxiliary air outlet pipe 11 is connected to the air outlet of the aeration blower 9. The other end of the auxiliary air outlet pipe 11 is connected to the neck inlet of the Venturi tube 12. The gas aerated by the aeration system rises and is discharged from the air outlet pipe 8 at the top. Utilizing the Venturi effect, the gas in the wastewater treatment tank 1 can be quickly discharged, preventing gas from overflowing from the gap between the top cover and the tank body, thus ensuring clean outside air. The auxiliary air outlet pipe 11 is equipped with a flow rate regulating valve, which can adjust the flow rate to precisely control the slight negative pressure inside the wastewater treatment tank 11.

[0033] The wastewater treatment tank 1 is also equipped with several inlet distribution pipes 5 located between adjacent treatment cylinders 2. Each inlet distribution pipe 5 is connected to the inlet water distribution system and has an outlet. The sludge return system 4 includes a sludge addition pipe that extends between the treatment cylinders 2. This sludge addition pipe can be connected to the sludge discharge pipe in the downstream sedimentation tank, thereby enabling sludge return and addition.

[0034] In this embodiment, the sludge addition pipe is preferably located above the inlet water distribution pipe 5, so that the sludge will flow downward due to its weight, and when it flows downward, it will be impacted by the inlet water, thereby making the sludge and sewage fully mixed.

[0035] In this embodiment, there are multiple effluent collection tanks 14 arranged in parallel, with one effluent collection tank 14 between every two rows of treatment cylinders 2. An effluent main trough 15, connected to the effluent collection tanks 14, is provided outside the sewage treatment tank 1, and the sewage from the sewage treatment tank 1 is directly fed into a sedimentation tank for sedimentation.

[0036] like Figure 3 As shown, Figure 3This diagram illustrates the principle of a treatment tank 2 treating wastewater.

[0037] The vertical aeration pipe 7 introduces air into the treatment cylinder 2. Since the wastewater in treatment cylinder 2 has a high oxygen content, this area is considered an aerobic zone. Aerobic bacteria in the sludge will be very active in this zone, and nitrifying bacteria will complete ammonification and nitrification under aerobic conditions, converting nitrogen in the water into NO2. - and NO3 - Meanwhile, polyphosphate-accumulating bacteria complete phosphorus uptake in this area. As the gas rises in treatment cylinder 2, it forms an airlift, allowing wastewater outside treatment cylinder 2 to be replenished from the bottom. This causes the wastewater to circulate around each treatment cylinder 2. After flowing out from the top of treatment cylinder 2, the wastewater is circulated downwards and replenished into treatment cylinder 2. During the circulation process, treatment cylinder 2 and the area above it are aerobic zones, while the dissolved oxygen decreases during the downward flow, creating an anaerobic zone. Denitrifying bacteria utilize the nitrates brought from the aerobic zone and the biodegradable organic matter (mainly soluble and rapidly biodegradable organic matter) in the wastewater to carry out denitrification, achieving the purpose of simultaneous carbon removal and nitrogen removal.

[0038] In the lower part of treatment tank 2, the dissolved oxygen level is even lower, and the nitrates are almost completely consumed, thus forming an anaerobic zone. In this zone, polyphosphate-accumulating bacteria release phosphorus. Therefore, through the repeated circulation of wastewater, anaerobic, aerobic, and anoxic biological treatment is achieved.

[0039] like Figure 1 , Figure 4 and Figure 5 As shown, the aeration main pipe is inclined, and a drainage device 10 for discharging condensate is provided at the lower end of the aeration main pipe.

[0040] The drainage device 10 includes a butterfly valve 107 located at the drain outlet at the bottom of the main aeration pipe. A passive operating rod 108 is connected to the valve shaft of the butterfly valve 107. The drainage device 10 also includes a cross-flow fan impeller 1015, which rotates within the main aeration pipe 101 via an impeller shaft. A support is provided inside the main aeration pipe 101, and the inner end of the impeller shaft is rotatably mounted on the support. The outer end of the impeller shaft penetrates the main aeration pipe 101 and protrudes from it. A [missing information - likely a device or component] is fixed to the outer end of the impeller shaft. The aeration main pipe 101 has an externally fixed base 102, on which a driven large gear 104 meshes with the driving small gear 103. An active pressure rod 106 is fixedly mounted on the driven large gear 104. The active pressure rod 106 drives the passive operating rod 108 to elastically deflect around the center of the valve shaft via a linkage mechanism, thus intermittently opening and closing the butterfly valve 107. The linkage mechanism includes a rotating sleeve 1012 located in the middle. A mounting plate 1011 is provided at the bottom of the aeration main pipe 101. The sleeve 1012 is elastically rotatably mounted on the mounting plate 1011 by a spring. A first connecting rod 1010 and a second connecting rod 109 are connected to the rotating sleeve 1012. The first connecting rod 1010 and the second connecting rod 109 form an included angle with each other. The first connecting rod 1010 cooperates with the active pressure rod 106. A force-applying sliding sleeve 1091 is provided at the end of the second connecting rod 109. The force-applying sliding sleeve 1091 has a strip-shaped through hole extending along the length of the second connecting rod 109. The strip-shaped through hole is fitted onto the passive operating rod 108. The extension direction of rod 1010 intersects with the active pressure rod 106. When the driven large gear 104 rotates, it drives the active pressure rod 106 to press the first connecting rod 1010, forcing the first connecting rod 1010 to deflect around the center of the rotating sleeve 1012, and causing the second connecting rod 109 to deflect around the rotating sleeve 1012, which in turn drives the passive operating rod 108 to open the butterfly valve 107. When the first connecting rod 1010 deflects to the lowest position, it separates from the active pressure rod 106. Under the action of the spring, the second connecting rod 109 drives the passive operating rod 108 to deflect in the opposite direction, closing the butterfly valve 107.

[0041] Furthermore, since the amount of condensate in the aeration main pipe 101 is not large, the butterfly valve 107 only needs to be opened at a small angle to discharge the condensate.

[0042] Preferably, the gear ratio between the driving pinion 103 and the driven gear 104 is 1:8 to 1:10. The power transmission between the driving pinion 103 and the driven gear 104 ensures that the valve opens only once every relatively long period. Furthermore, since the two gears form a reduction gear set, the torque is increased, resulting in a greater and smoother opening force for the butterfly valve 107.

[0043] In this embodiment, a connecting stud 105 is provided on the driven gear, and a sleeve 1061 fitted onto the connecting stud 105 is provided at the end of the driving pressure rod 106. A clamping nut for clamping the sleeve is threaded onto the connecting stud 105. Loosening the clamping nut allows adjustment of the angle of the driving pressure rod 106, which in turn adjusts the installation angle of the driving pressure rod 106, thereby adjusting the compression angle of the driving pressure rod 106 against the first connecting rod 1010.

[0044] A mounting plate 1011 is provided at the bottom of the aeration main pipe 101. The rotating sleeve 1012 is elastically mounted on the mounting plate 1011 by a spring. A first connecting rod 1010 and a second connecting rod 109 are connected to the rotating sleeve 1012. The first connecting rod 1010 and the second connecting rod 109 form an included angle, thereby creating a lever swing state. The first connecting rod 1010 cooperates with the active pressure rod 106. A force-applying sliding sleeve 1091 is provided at the end of the second connecting rod 109. The force-applying sliding sleeve 1091 is provided with a strip-shaped through hole extending along the length direction of the second connecting rod 109. The strip-shaped through hole is fitted onto the passive operating rod 108. The extension direction of the first connecting rod 1010 intersects with the active pressure rod 106. When the driven gear 104 rotates, it drives the active pressure rod 106 to press the first connecting rod 1010, forcing the first connecting rod 1010 to deflect around the center of the rotating sleeve 1012, and causing the second connecting rod 109 to deflect around the rotating sleeve 1012, which in turn drives the passive operating rod 108 to open the butterfly valve 107. When the first connecting rod 1010 deflects to the lowest position, the first connecting rod 1010 will be separated from the rotation trajectory of the active pressure rod 106 and will be separated from the active pressure rod 106. Under the action of the spring, the second connecting rod 109 drives the passive operating rod 108 to deflect in the opposite direction and close the butterfly valve 107.

[0045] A spring connecting post 1014 is provided on the second connecting rod 109, and a spring connecting post 1014 is also provided on the mounting plate 1011. The spring is a tension spring 1013, and the two ends of the tension spring 1013 are respectively connected to the spring connecting post 1014. The elastic force of the tension spring 1013 forces the second connecting rod 109 to drive the passive operating rod 108 to deflect, thereby closing the butterfly valve 107. The tension of the tension spring 1013 can be used to pull the second connecting rod 109 to force the passive operating rod 108 to deflect to the closed position.

[0046] The position where the first connecting rod 1010 and the active pressure rod 106 are pressed together is set as the active pressing position, and the position where the second connecting rod 109 and the passive operating rod 108 are engaged together is set as the passive force application position. The distance between the active pressing position and the center of the rotating sleeve 1012 is greater than the distance between the passive force application position and the center of the rotating sleeve 1012.

[0047] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and alterations to the technical solution of the present utility model without departing from its design spirit shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A wastewater treatment device, comprising a wastewater treatment tank, wherein the wastewater treatment tank is provided with an inlet water distribution system and an outlet water outlet, characterized in that: The wastewater treatment tank contains several treatment cylinders arranged in a rectangular array, mounted on fixed supports. Both the upper and lower ends of each treatment cylinder are open. An in-tank aeration system is located at the bottom of the wastewater treatment tank. This system includes horizontal aeration pipes and several vertical aeration pipes connected to the horizontal aeration pipes. Each vertical aeration pipe extends into the interior of a treatment cylinder from below. The horizontal aeration pipes are connected to a main aeration pipe outside the wastewater treatment tank, which is connected to an aeration blower. An effluent collection trough connected to the effluent outlet is located at the top of the wastewater treatment tank. A top cover is installed at the top of the wastewater treatment tank, sealing the top opening. An air outlet is located on the top cover, and an air outlet is connected to an air purification system. A sludge return system is also installed within the wastewater treatment tank.

2. The wastewater treatment device as described in claim 1, characterized in that: The fixed support includes a stainless steel mounting frame fixed to the side wall of the sewage treatment tank. The stainless steel mounting frame is provided with a number of mounting holes. The outer wall of the treatment cylinder is provided with mounting ears. The treatment cylinder is inserted into the mounting holes and fixed to the stainless steel mounting frame by the mounting ears.

3. The wastewater treatment device as described in claim 2, characterized in that: A pressure sensor is installed at the top of the sewage treatment tank, a venturi tube is installed on the air outlet pipe, and an auxiliary air outlet pipe is connected to the air outlet of the aeration blower. The other end of the auxiliary air outlet pipe is connected to the neck inlet of the venturi tube.

4. The wastewater treatment device as described in claim 3, characterized in that: The wastewater treatment tank is also equipped with several inlet distribution pipes located between adjacent discharge treatment cylinders. Each inlet distribution pipe is connected to the inlet water distribution system and has an outlet.

5. A wastewater treatment device as described in claim 4, characterized in that: The number of water collection tanks is multiple and arranged in parallel, with one water collection tank between every two rows of treatment cylinders.

6. A wastewater treatment device as described in claim 1, characterized in that: The aeration main pipe is inclined, and a drainage device for discharging condensate is provided at the lower end of the aeration main pipe.

7. A wastewater treatment device as described in claim 6, characterized in that: The drainage device includes a butterfly valve located at the drain outlet at the bottom of the aeration main pipe. A passive operating rod is connected to the valve shaft of the butterfly valve. The drainage device also includes a cross-flow fan impeller, which rotates within the aeration main pipe via an impeller shaft. A support is provided inside the aeration main pipe, and the inner end of the impeller shaft is rotatably mounted on the support. The outer end of the impeller shaft passes through the aeration main pipe and protrudes. A driving pinion is fixed to the outer end of the impeller shaft. A base is fixed to the outside of the aeration main pipe, and a driven gear meshing with the driving pinion is rotatably mounted on the base. A driving pressure rod is fixedly mounted on the driven gear. The driving pressure rod drives the passive operating rod to elastically deflect around the center of the valve shaft via a linkage mechanism, thereby achieving intermittent opening and closing of the butterfly valve. The linkage mechanism includes a rotating sleeve located in the middle. The aeration main pipe... A mounting plate is provided at the bottom, and the rotating sleeve is elastically mounted on the mounting plate by a spring. A first connecting rod and a second connecting rod are connected to the rotating sleeve. The first connecting rod and the second connecting rod form an included angle with each other. The first connecting rod cooperates with the active pressure rod. A force-applying sliding sleeve is provided at the end of the second connecting rod. The force-applying sliding sleeve is provided with a strip-shaped through hole extending along the length direction of the second connecting rod. The strip-shaped through hole is fitted onto the passive operating rod. The extension direction of the first connecting rod intersects with the active pressure rod. When the driven large gear rotates, it drives the active pressure rod to press down on the first connecting rod, forcing the first connecting rod to deflect around the center of the rotating sleeve. This causes the second connecting rod to deflect around the rotating sleeve, driving the passive operating rod to open the butterfly valve. When the first connecting rod deflects to the lowest position, it separates from the active pressure rod. Under the action of the spring, the second connecting rod drives the passive operating rod to deflect in the opposite direction, closing the butterfly valve.

8. A wastewater treatment device as described in claim 7, characterized in that: The position where the first connecting rod and the active pressure rod are pressed together is set as the active pressing position, and the position where the second connecting rod and the passive operating rod are engaged together is set as the passive force application position. The distance between the active pressing position and the center of the rotating sleeve is greater than the distance between the passive force application position and the center of the rotating sleeve.

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