An MBBR sewage treatment reaction tank under anaerobic conditions

Abstract

The present invention discloses an MBBR sewage treatment reaction tank under an anaerobic environment, which relates to the technical field of sewage treatment. The reaction tank includes a reaction tank, and guide paddles are installed on both sides inside the reaction tank. It also includes a suspended filtration mechanism that always floats above the liquid level and is connected to a horizontal guide plate that sinks below the liquid level. A filler injection assembly is slidably installed at the bottom of the suspended filtration mechanism, and an aeration pipe component whose up-and-down aeration direction is consistent with the up-and-down water flow direction of the horizontal guide plate. A transmission component is installed in the suspended filtration mechanism. When sewage is poured into the reaction tank from the tank opening, the suspended filtration mechanism gradually rises and drives the filler injection assembly to continuously move through the transmission component. By setting up the suspended filtration mechanism, the present invention preliminarily filters and removes impurities from the sewage poured into the reaction tank. The suspended filtration mechanism will rise and fall with the change of the water level in the tank and drive the filler injection assembly to move, avoiding the accumulation of fillers in the tank during injection and improving the efficiency of filler film formation.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to an MBBR sewage treatment reaction tank under anaerobic environment. Background Art

[0002] With the advancement of science and technology, there are more diverse ways to treat sewage. Among them, the MBBR process is a process that combines the suspended growth activated sludge method and the attached growth biofilm method. The sewage continuously passes through the suspended filler in the MBBR reactor and gradually forms a biofilm on the inner and outer surfaces of the filler. The sewage is purified through the action of microorganisms on the biofilm. The filler moves freely under the action of the swirling and turning of the mixed liquid in the reactor. For anaerobic environment reactors, it mainly relies on mechanical stirring. Unlike general fillers, the suspended filler can contact with sewage frequently and multiple times, and can flow with the flow of the mixed liquid and fully mix and contact with each other. Therefore, it is called MBBR process.

[0003] The patent publication number of the existing patent application is: CN104211172B, and the publication date is January 4, 2017. The name of the patent is "An anaerobic, anoxic MBBR reaction tank". The patent includes a tank body, a horizontal guide wall is vertically arranged at the bottom of the tank body, and the length direction of the horizontal guide wall is consistent with the length direction of the tank body. A stirring device is arranged on the tank body wall, and at least one parameter of the elevation angle, horizontal angle or height of the stirring device can be adjusted. An underwater propeller is arranged at the bottom of the tank body, and the tank body is provided with an inlet and an outlet for sewage to enter and exit. The inlet and the outlet are respectively located at two diagonal positions of the tank body. The present invention realizes the continuous rotation flow of the water body by setting a horizontal guide wall, and there is no need to set a reflux device or a reflux pipeline, which ensures the biofilm adhesion effect of the filler and also achieves the purpose of increasing the biomass per unit tank capacity. A plurality of pairs of stirring devices and underwater propellers are arranged in the tank body to ensure the flow and stirring effect of the fluid. The second stirrer is provided with a horizontal angle to avoid the occurrence of filler accumulation at the corner.

[0004] The above application has shortcomings. Although the capacity of the reaction tank can be increased by means of lateral guide walls and underwater thrusters without affecting the normal flow of the filler, the filler tends to accumulate in the reaction tank when added. During the subsequent sewage circulation process, the stirring device alone cannot ensure that the filler diffuses in the sewage in time, resulting in the filler being unable to form a biofilm quickly and fully. Summary of the invention

[0005] The purpose of the present invention is to provide an MBBR sewage treatment reaction tank under anaerobic environment to solve the deficiencies in the above-mentioned prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A MBBR sewage treatment reaction tank under an anaerobic environment comprises a reaction tank for containing sewage and fillers, guide paddles are installed on both sides of the reaction tank, and a suspended filtering mechanism is also included, which is always floating above the liquid surface and has a transverse guide plate sunk below the liquid surface pulled by a biological rope, a filler injection assembly and an aeration pipe are slidably installed at the bottom of the suspended filtering mechanism, which penetrates the transverse guide plate and the suspended filtering mechanism, and the up and down aeration directions of the aeration are consistent with the up and down water flow directions of the transverse guide plate, and a transmission member is installed in the suspended filtering mechanism, which is respectively connected to the aeration pipe member and the filler injection assembly, when sewage is poured into the reaction tank from the tank mouth, the suspended filtering mechanism gradually rises, and drives the filler injection assembly to move continuously through the transmission member.

[0008] Preferably, the suspended filtration mechanism comprises a filter screen, both sides of the bottom of the filter screen are fixedly connected with floating rods, the top surface of the filter screen is a centrally raised arc surface, and both sides of the reaction pool are equipped with collection bins connected thereto.

[0009] Preferably, an upper groove and a lower groove facing opposite directions are respectively formed on both sides of the aeration pipe, and a plurality of aeration holes are formed on the upper groove and the lower groove.

[0010] Preferably, a limiting sliding block matching the lower groove is fixedly connected to the transverse guide plate, and the top of the lower groove is located between the two guide paddles.

[0011] Preferably, the filler injection assembly comprises a movable frame, the top of the movable frame is slidably connected to the filter screen, a brush plate is installed inside the movable frame, and a feed pipe is installed at the bottom of the movable frame.

[0012] Preferably, the transmission member includes a rotating shaft rotatably installed at the bottom of the filter, one end of the rotating shaft is fixedly connected to a driven gear, a transmission rack meshing with the driven gear is embedded on the aeration pipe, the other end of the rotating shaft is fixedly connected to a driving gear, and a driven rack meshing with the driving gear is horizontally embedded on the top of the movable frame.

[0013] Preferably, a filter basin is installed on the top surface of the transverse guide plate, and a through hole for the biological rope to pass through is opened at the bottom of the filter basin.

[0014] Preferably, a drainage valve is installed at the bottom of the reaction tank, and a filler barrier net is embedded on the top.

[0015] Preferably, a one-way pump connected to the reaction tank is installed on the back of the reaction tank, the liquid inlet of the one-way pump is located above the drain valve port, and the liquid outlet is located above the filter basin.

[0016] Preferably, filler retaining nets are rotatably installed on both sides inside the filter basin, and guiding grooves for forcing the filler retaining nets to turn over are vertically formed on the inner wall of the reaction tank. When the transverse flow guide plate moves downward, the filler retaining nets are turned out of the filter basin.

[0017] In the above technical solution, a suspended filtration mechanism is provided to preliminarily filter and remove impurities from the sewage poured into the reaction tank. The suspended filtration mechanism will rise and fall with the change of the water surface in the tank. When it rises and falls, it will drive the filler injection assembly to move, avoiding the accumulation of fillers in the tank when injecting fillers. After the suspended filtration mechanism rises to the highest point, the transverse flow guide plate cooperates with the flow guide paddles on both sides to make the fillers and sewage circulate in the tank. At the same time, the aeration pipe component aerates along the upstream and downstream water flow directions of the transverse flow guide plate, accelerating the diffusion speed of the fillers in the sewage. And during the continuous process of water injection and drainage, the reciprocatingly rising and falling suspended filtration mechanism and the transverse flow guide plate will also scrape off the sundries attached to the aeration pipe component, ensuring the aeration quality and improving the efficiency of filler film formation.

[0018] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0019] This application document provides an overview of various implementations or examples of the technologies described in the present disclosure, and is not a complete disclosure of the entire scope or all features of the disclosed technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of an MBBR sewage treatment reaction tank under an anaerobic environment according to the present invention;

[0022] Figure 2 It is a front cross-sectional view of an MBBR sewage treatment reaction tank under an anaerobic environment according to the present invention;

[0023] Figure 3 It is an enlarged view of part A of an MBBR sewage treatment reaction tank under an anaerobic environment according to the present invention;

[0024] Figure 4 It is a side cross-sectional view of an MBBR sewage treatment reaction tank under an anaerobic environment according to the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the aeration pipe component in an MBBR sewage treatment reaction tank under an anaerobic environment according to the present invention;

[0026] Figure 6 This is a schematic structural diagram of a filler injection component in an MBBR sewage treatment reaction tank under an anaerobic environment according to the present invention;

[0027] Figure 7 This is a schematic transmission diagram of a transmission member, a filler injection component, and an aeration pipe component in an MBBR sewage treatment reaction tank under an anaerobic environment according to the present invention;

[0028] Figure 8 This is a schematic overall structural diagram of a filter basin in an MBBR sewage treatment reaction tank under an anaerobic environment according to the present invention.

[0029] Explanation of reference numerals:

[0030] 1. Reaction tank; 101. Guide paddle; 102. Collection bin; 103. Drain valve port; 104. Filler barrier net; 105. Guide groove; 106. Sewage collection port; 107. Tooth disc; 2. Suspended filtration mechanism; 201. Filter screen; 202. Floating rod; 203. Connecting frame; 3. Biological rope; 4. Transverse guide plate; 401. Limit slider; 5. Filler injection component; 501. Moving frame; 502. Brush plate; 503. Feeding pipe; 504. Driven rack; 505. Feeding hose; 6. Aeration pipe component; 601. Upper groove; 602. Lower groove; 603. Aeration hole; 604. Driving rack; 7. Transmission member; 701. Rotating shaft; 702. Driven gear; 703. Driving gear; 8. Filter basin; 801. Through hole; 802. Filler retaining net; 803. Connecting shaft; 804. Cam; 9. Unidirectional pumping pump; 901. Water storage chamber; 902. Unidirectional inlet pipe; 903. Unidirectional outlet pipe; 904. Piston plate; 905. Unidirectional valve plate; 906. Link member; 10. Towing rope; 11. Unidirectional driving rack; 1101. Connecting rod; 1102. Teeth; 1103. Accommodating groove. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0032] Please refer to Figure 1-8An MBBR sewage treatment reaction tank 1 under an anaerobic environment provided by an embodiment of the present invention comprises a reaction tank 1 for containing sewage and fillers, guide paddles 101 are installed on both sides of the reaction tank 1, and also comprises a suspended filtering mechanism 2, which always floats above the liquid surface and pulls a transverse guide plate 4 sunk below the liquid surface through a biological rope 3, a filler injection assembly 5 and an aeration pipe 6 are slidably installed at the bottom of the suspended filtering mechanism 2, which penetrates the transverse guide plate 4 and the suspended filtering mechanism 2, and its up and down aeration direction is consistent with the up and down water flow direction of the transverse guide plate 4, and a transmission member 7 which is respectively connected to the aeration pipe 6 and the filler injection assembly 5 is installed in the suspended filtering mechanism 2. When sewage is poured into the reaction tank 1 from the pool mouth, the suspended filtering mechanism 2 gradually rises and drives the filler injection assembly 5 to move continuously through the transmission member 7.

[0033] Specifically, the reaction tank 1 is an anaerobic reaction tank 1. Sewage enters the tank from the tank opening. Before the sewage reaches the bottom of the tank, it will be filtered by the suspended filtration mechanism 2 to screen out larger impurities. And the suspended filtration mechanism 2 has buoyancy and can always float above the liquid surface. That is, during the process of injecting sewage into the reaction tank 1, as the liquid level rises, the suspended filtration mechanism 2 will also gradually rise, and the transverse guide plate 4 that originally sank to the bottom of the tank is pulled up to a certain height by multiple biological ropes 3 until the transverse guide plate 4 is located between two guide paddles 101. At this time, when the aeration pipe component 6 aerates up and down, the middle is separated by the transverse guide plate 4. Open the guide paddles 101 and the aeration pipe component 6 to make the sewage circulate horizontally in the reaction tank 1 with the transverse guide plate 4 as the center, so that the guide paddles 101 cooperate with the aeration pipe component 6 to accelerate the circulation of sewage and packing. The microorganisms attached to the surface of the biological ropes 3 come into contact with the wastewater, so that the organic matter in the wastewater is oxidized and decomposed to achieve water quality purification. When the suspended filtration mechanism 2 drives the transverse guide plate 4 to rise, the biological ropes 3 are in a straightened state, which can prevent the adjacent biological ropes 3 from sticking and winding around each other, and then cooperate with the packing to perform multiple purification treatments on the wastewater. The cooperation of the aeration pipe component 6 for aeration can prevent the required rotation speed of the guide paddles 101 from being too fast, resulting in the packing being broken and the microorganisms on the surface of the packing being washed off. The aeration pipe component 6 and the guide paddles 101 push the water flow in the same direction at the same time to prevent insufficient hydraulic shear force from failing to play a fluidization role. When injecting sewage, the packing injection component 5 is used to send the packing to the bottom of the tank at the same time, so that the packing is located below the suspended filtration mechanism 2. And during the process of the suspended filtration mechanism 2 gradually rising, the transmission part 7 installed on the suspended filtration mechanism 2 will play a role in driving the packing injection component 5 to move. Through the change of the relative position between the suspended filtration mechanism 2 and the aeration pipe component 6, the transmission part 7 rotates and forces the packing injection component 5 to move towards the pool wall, preventing the fed packing from accumulating at a certain position in the pool and ensuring full contact between the packing and the wastewater. And when the treated wastewater is discharged, the suspended filtration mechanism 2 will drive the transverse guide plate 4 to descend again. When continuously treating the wastewater, the suspended filtration mechanism 2 and the transverse guide plate 4 reciprocate up and down to scrape the sediment attached to the outside of the aeration pipe component 6 back and forth to avoid affecting the aeration quality. At the same time, the aeration pipe component 6 can also play a role in limiting the transverse guide plate 4 to avoid the transverse guide plate 4 from shifting and tilting when the water flow circulates and impacts it.

[0034] Compared with the prior art, by setting up the suspension filtration mechanism 2 to preliminarily filter and remove impurities from the sewage poured into the reaction tank 1, the suspension filtration mechanism 2 will rise and fall with the change of the water surface in the tank. When it rises and falls, it will drive the filler injection assembly 5 to move, avoiding the accumulation of the filler in the tank when injecting the filler. After the suspension filtration mechanism 2 rises to the highest point, the transverse flow guide plate 4 cooperates with the flow guide paddles 101 on both sides to make the filler and the sewage circulate in the tank. At the same time, the aeration pipe component 6 aerates along the up and down water flow direction of the transverse flow guide plate 4. And during the continuous treatment process, the reciprocatingly rising and falling suspension filtration mechanism 2 will also scrape off the sundries attached to the aeration pipe component 6, ensuring the aeration quality, accelerating the diffusion speed of the filler in the sewage, and improving the efficiency of the filler film formation.

[0035] In a further embodiment of the present invention, the suspension filtration mechanism 2 includes a filter screen 201. Both sides of the bottom of the filter screen 201 are fixedly connected with floating rods 202. The filter screen 201 floats above the liquid level through the floating rods 202 on both sides, achieving the purpose of preliminarily filtering the poured wastewater. The top surface of the filter screen 201 is an arc surface convex in the center. Collection bins 102 communicated with the reaction tank 1 are installed on both sides of the reaction tank 1. Collection ports 106 are opened on both sides of the reaction tank 1. The collection ports 106 are strip-shaped and communicate with the collection bins 102. Specifically, after the sewage poured into the reaction tank 1 is filtered by the filter screen 201 in the suspension filtration mechanism 2, the screened impurities will remain on the top surface of the filter screen 201. If not cleaned, it will affect the subsequent sewage filtration efficiency. Therefore, when the filter screen 201 rises to a certain height, its two sides will be at the collection ports 106 on both sides of the reaction tank 1. Since the top surface of the filter screen 201 is an arc surface, the impurities at the top of the filter screen 201 will slide into the collection ports 106 and then enter the collection bins 102 through the collection ports 106.

[0036] In a further embodiment of the present invention, upper grooves 601 and lower grooves 602 with opposite orientations are respectively formed on both sides of the aeration pipe member 6. Both the upper grooves 601 and the lower grooves 602 face away from the direction of water flow circulation. When the water flows reciprocally in a cycle, the water on the transverse baffle 4 flows leftward, while the water below it flows rightward. A number of aeration holes 603 are provided on both the upper grooves 601 and the lower grooves 602. When the aeration holes 603 on each groove are aerated, they can all face the water flow direction, increasing the aeration range. Specifically, a plurality of aeration pipe members 6 are respectively fixed on both sides inside the reaction tank 1. After the suspension filtration mechanism 2 pulls the transverse baffle 4 upward to between the two guide vanes 101, the aeration pipe member 6 is opened for aeration. The aeration holes 603 are respectively arranged in the upper grooves 601 and the lower grooves 602, and aeration will be carried out along the direction of water flow circulation. Aeration can not only serve the purpose of pushing the water flow, reducing the number of installed blades, but also enable the filler to quickly and evenly diffuse in the wastewater, and also prevent the guide vane 101 from rotating too fast, which may break the filler and cause the microorganisms on the surface of the filler to wash off. The guide vane 101 with a slower rotation speed cooperates with the aeration pipe member 6 to push the water flow, preventing insufficient hydraulic shear force from failing to play a fluidization role.

[0037] In a further embodiment of the present invention, a limit slider 401 matching the lower groove 602 is fixedly connected to the transverse baffle 4, and the top of the lower groove 602 is located between the two guide vanes 101. Specifically, when continuously treating wastewater, the suspension filtration mechanism 2 and the transverse baffle 4 will move up and down along each aeration pipe member 6. With the limit cooperation of multiple aeration pipe members 6, the transverse baffle 4 and the suspension filtration mechanism 2 can only perform vertical lifting, avoiding the position of the transverse baffle 4 being changed when the water flow in the tank is too fast. The limit slider 401 installed on the transverse baffle 4 can slide in the lower groove 602, which not only further limits the transverse baffle 4 but also limits the suspension filtration mechanism 2 when it rises, preventing the suspension filtration mechanism 2 from rising too high due to excessive injection of wastewater, giving the suspension filtration mechanism 2 a maximum floating position. When the suspension filtration mechanism 2 is at this position, both sides of the filter screen 201 are respectively at the sewage collection ports 106 on both sides of the reaction tank 1, and the transverse baffle 4 is exactly in the middle of the two guide vanes 101. At this time, the transverse baffle 4 touches the switch of the guide vane 101, eliminating the need for manual activation of the guide vane 101, which is convenient for operation, avoiding the transverse baffle 4 being too high and affecting the treatment effect of the wastewater and the filler circulating and flowing in the reaction tank 1, ensuring the stability of the water flow circulation, and the limit slider 401 can also scrape off the sundries attached in the first groove, preventing the exhaust from being blocked after the aeration holes 603 are opened. When the aeration volume of the aeration pipe member 6 is controlled within a reasonable range and used in cooperation with the guide vane 101, it can achieve the stirring purpose without oxidation reaction.

[0038] In a further embodiment of the present invention, the filler injection assembly 5 includes a moving frame 501. The top of the moving frame 501 is slidably connected to the filter screen 201. A brush plate 502 is installed inside the moving frame 501, and a feeding pipe 503 is installed at the bottom of the moving frame 501. A feeding hose 505 is installed on one side of the feeding pipe 503, and the feeding hose 505 penetrates through the suspension filtration mechanism 2 and is communicated with the filler storage bin. Specifically, the moving frame 501 can move below the filter screen 201, and at the same time, the feeding pipe 503 installed below the moving frame 501 can be used to convey the filler, so that the filler is fed below the filter screen 201. When the suspension filtration mechanism 2 rises and drives the entire filler injection assembly 5 to move through the transmission member 7, the position of the feeding pipe 503 changes, increasing the scattering range of the filler and avoiding the accumulation of the filler. At the same time, when the brush plate 502 moves, it will also scrape and clean the impurities attached to the bottom of the filter screen 201, preventing inconvenient cleaning after long-term attachment.

[0039] In a further embodiment of the present invention, the transmission member 7 includes a rotating shaft 701 rotatably installed at the bottom of the filter screen 201. One end of the rotating shaft 701 is fixedly connected to a driven gear 702. A transmission rack 604 meshing with the driven gear 702 is embedded on the aeration pipe member 6. The transmission rack 604 and the aeration pipe member 6 are both vertically arranged. The other end of the rotating shaft 701 is fixedly connected to a driving gear 703. A driven rack 504 meshing with the driving gear 703 is horizontally embedded at the top of the moving frame 501. Specifically, when the suspension filtration mechanism 2 rises, it drives the transmission member 7 to move upward together. When the position of the rotating shaft 701 in the transmission member 7 changes, since the driven gear 702 at its end is meshed with the transmission rack 604 on the aeration pipe member 6, the rotating shaft 701 will rotate. When rotating, it will drive the moving frame 501 to move at the bottom of the filter screen 201 through the driving gear 703, so that the lifting and lowering of the suspension filtration mechanism 2 can drive the filler injection assembly 5 for conveying the filler to move, thereby injecting the filler into different areas in the reaction tank 1 during the injection of the wastewater, and mixing the filler and the wastewater in advance before the wastewater circulates.

[0040] In a further embodiment of the present invention, a filter basin 8 is installed on the top surface of the transverse guide plate 4. Through holes 801 for the biological ropes 3 to pass through are opened at the bottom of the filter basin 8. A towing rope 10 for separately lifting the filter basin 8 is also installed in the reaction tank 1. Specifically, when discharging the treated wastewater, if a part of the filler is in the filter basin 8, it will not reach the drain port along with the water flow. The aperture of its filter holes is smaller than the particle size of the filler. The biological ropes 3 mainly rely on the microbial film fixed on the surface of the carrier to purify the organic matter. The added towing rope 10 can be used to separately lift the filter basin 8. When lifting, the filter basin 8 can stir the biological film on the biological ropes 3, improving the purification effect of the biological ropes 3. When the filter basin 8 is not lifted, the filter basin 8 will stay on the transverse guide plate 4 under the action of gravity and rise and fall together with the transverse guide plate 4.

[0041] In a further embodiment of the present invention, a drain valve port 103 is installed at the bottom of the reaction tank 1, and a filler barrier net 104 is embedded on the top thereof. Specifically, after the wastewater is purified in the reaction tank 1, the drain valve port 103 is opened to allow the wastewater to flow out from the bottom of the reaction tank 1. At the same time, the filler barrier net 104 can prevent the filler and water from being discharged together, so as to facilitate the recycling of the filler.

[0042] In a further embodiment of the present invention, a one-way pumping pump 9 connected to the reaction tank 1 is installed on the back side, and is in transmission connection with the suspended filtering mechanism 2. The liquid inlet of the one-way pumping pump 9 is located above the drain valve port 103, and the liquid outlet is located above the filter basin 8. Specifically, when the wastewater is discharged from the drain valve port 103 at the bottom of the tank, the suspended filtering mechanism 2 gradually descends, and at the same time drives the one-way pumping pump 9 to continuously pump away the wastewater and filler above the drain valve port 103, so as to avoid the continuous accumulation of filler on the filler barrier net 104 at the drain valve port 103 when the wastewater is discharged, so as to prevent the normal discharge of the wastewater from being affected, improve the discharge efficiency of the wastewater after purification, speed up the subsequent wastewater processing time, and at the same time allow part of the filler that flows to the bottom of the transverse guide plate 4 along the water flow to return to the transverse guide plate 4. Above, it can avoid that all the fillers are under the transverse guide plate 4 when subsequent wastewater is poured in. When the wastewater is continuously purified, the filler can form a membrane faster and diffuse into the wastewater more efficiently. The existing MBBR process mostly uses a grid set on the outlet of the reaction tank 1 to intercept the suspended filler, which often causes the suspended filler to be stuck on the grid and accumulate around the outlet of the reaction tank 1, affecting the water outlet efficiency. In order to ensure normal water outlet, it is necessary to clean it manually in time, which brings great inconvenience to operation and maintenance. After the one-way suction pump 9 is installed, most of the fillers accumulated at the drainage valve port 103 along the water flow can be pumped back to the top of the transverse guide plate 4 while draining water, without the need for manual cleaning of the filler, and it is convenient for the filler to diffuse quickly when subsequent wastewater enters.

[0043] In a further embodiment of the present invention, the one-way pumping pump 9 includes a water storage chamber 901 installed on the back of the reaction tank 1. A one-way inlet pipe 902 and a one-way outlet pipe 903 are installed between the water storage chamber 901 and the reaction tank 1. A piston plate 904 is installed inside the water storage chamber 901. A one-way valve plate 905 is hinged to the top surface of the piston plate 904. A connecting rod member 906 is installed on the top of the piston plate 904. A toothed disk 107 is also rotatably installed on the back of the reaction tank 1. The top end of the connecting rod member 906 is rotatably connected to an eccentric position on one side of the toothed disk 107. A connecting frame 203 is installed on the top of the filter screen 201. A one-way driving rack 11 that meshes with the toothed disk 107 in one direction is installed on one side of the connecting frame 203. Specifically, the one-way driving rack 11 includes a connecting rod 1101 and teeth 1102 elastically hinged to one side of the connecting rod 1101. A receiving groove 1103 for receiving the teeth 1102 is also provided on the connecting rod 1101. When the suspension filtering mechanism 2 moves downward, it drives the one-way driving rack 11 to move downward, and at the same time drives the toothed disk 107 to rotate through the one-way driving rack 11. The toothed disk 107 then drives the piston plate 904 inside the cavity to reciprocate up and down through the connecting rod member 906. When draining water, part of the wastewater and most of the filler flowing along with the wastewater to the bottom of the pool are pumped into the water storage chamber 901 through the one-way inlet pipe 902, and then the water in the water storage chamber 901 is discharged back to the transverse guide plate 4 in the reaction tank 1 through the one-way outlet pipe 903, without adding a separate power source to the one-way pumping pump 9, reducing power consumption. When wastewater is injected into the reaction tank 1 and the filter screen 201 rises, although the one-way driving rack 11 rises with it, when the teeth 1102 on the one-way driving rack 11 abut against the toothed disk 107, they will be forced to turn into the receiving groove 1103 and will not drive the toothed disk 107 to rotate, avoiding pumping the wastewater into the water storage chamber 901 when injecting wastewater and not affecting the efficiency of wastewater treatment.

[0044] In another embodiment of the present invention, the one-way pumping pump 9 is an independent water pump, which is electrically connected to the drainage valve port 103. Specifically, when the drainage valve port 103 is opened, the one-way pumping pump 9 is also turned on at the same time. At this time, when the wastewater is discharged, the one-way pumping pump 9 continuously pumps the wastewater with filler aggregated and returns the filler above the transverse guide plate 4.

[0045] In a further embodiment of the present invention, packing retaining nets 802 are rotatably installed on both sides inside the filter basin 8. One side of each packing retaining net 802 is fixedly connected to a connecting shaft 803. One end of the connecting shaft 803 penetrates through the filter basin 8 and is fixedly connected to a cam 804. A guiding groove 105 for forcing the packing retaining net 802 to turn over is vertically formed on the inner wall of the reaction tank 1. The cam 804 is located in the guiding groove 105. When the horizontal flow deflector 4 moves downward, the packing retaining net 802 turns out of the filter basin 8. Specifically, the guiding groove 105 gradually narrows from top to bottom and has a width transition section. When the suspended filtration mechanism 2 in the reaction tank 1 descends to drain wastewater, the cam 804 moves downward from the width transition section of the guiding groove 105, and its convex part will be forced to rotate upward and the rotation is continuously restricted, so that the packing retaining nets 802 on both sides of the filter basin 8 turn out simultaneously to block the packing above the horizontal flow deflector 4 from both sides, further preventing the loss of the packing above the horizontal flow deflector 4. When the suspended filtration mechanism 2 in the reaction tank 1 rises when wastewater is poured into the reaction tank 1, the cam 804 moves upward from the width transition section. When the horizontal flow deflector 4 reaches between the two flow guide paddles 101, under the action of the gravity of the packing retaining net 802, the cam 804 rotates back to its original position, allowing the packing retaining net 802 to cover the filter basin 8 again so as not to affect the normal circulation of wastewater.

[0046] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. An MBBR sewage treatment reaction tank under anaerobic environment, comprising a reaction tank (1) for containing sewage and fillers, and guide paddles (101) are installed on both sides inside the reaction tank (1). Characterized in that, It further comprises: A suspended filtration mechanism (2), which always floats above the liquid level and pulls a horizontal guide plate (4) submerged below the liquid level through a biological rope (3). A filler injection assembly (5) is slidably installed at the bottom of the suspended filtration mechanism (2); An aeration pipe component (6), which penetrates through the horizontal guide plate (4) and the suspended filtration mechanism (2), and the up-and-down aeration direction thereof is the same as the up-and-down water flow direction of the horizontal guide plate (4). A transmission part (7) is installed in the suspended filtration mechanism (2) and is in transmission connection with the aeration pipe component (6) and the filler injection assembly (5) respectively; When sewage is poured into the reaction tank (1) from the pool mouth, the suspended filtration mechanism (2) gradually rises, drives the filler injection assembly (5) to continuously move through the transmission part (7), and at the same time pulls the originally submerged horizontal guide plate (4) at the bottom of the pool to rise through multiple biological ropes (3) until the horizontal guide plate (4) is located between the two guide paddles (101). At this time, when the aeration pipe component (6) aerates up and down, the middle is separated by the horizontal guide plate (4). Open the guide paddles (101) and the aeration pipe component (6) to make the sewage circulate in the reaction tank (1) centered on the horizontal guide plate (4), and let the guide paddles (101) cooperate with the aeration pipe component (6) to accelerate the circulation of sewage and fillers.

2. An MBBR sewage treatment reaction tank under anaerobic environment according to claim 1, Characterized in that, The suspended filtration mechanism (2) includes a filter screen (201), and floating rods (202) are fixedly connected to both sides of the bottom of the filter screen (201). The top surface of the filter screen (201) is an arc surface that is convex in the center. Collection bins (102) communicated with it are installed on both sides of the reaction tank (1).

3. An MBBR sewage treatment reaction tank under anaerobic environment according to claim 1, Characterized in that, Upper grooves (601) and lower grooves (602) with opposite directions are respectively opened on both sides of the aeration pipe component (6), and a plurality of aeration holes (603) are provided on both the upper grooves (601) and the lower grooves (602).

4. An MBBR sewage treatment reaction tank under anaerobic environment according to claim 3, Characterized in that, A limit slider (401) matching the lower groove (602) is fixedly connected to the horizontal guide plate (4), and the top of the lower groove (602) is located between the two guide paddles (101).

5. An MBBR sewage treatment reaction tank under anaerobic environment according to claim 2, Characterized in that, The filler injection assembly (5) includes a moving frame (501), the top of the moving frame (501) is slidably connected to the filter screen (201), a brush plate (502) is installed inside the moving frame (501), and a feeding pipe (503) is installed at the bottom of the moving frame (501).

6. An MBBR sewage treatment reaction tank under anaerobic environment according to claim 5, Characterized in that, The transmission member (7) includes a rotating shaft (701) rotatably installed at the bottom of the filter screen (201). One end of the rotating shaft (701) is fixedly connected to a driven gear (702). A transmission rack (604) meshing with the driven gear (702) is embedded on the aeration pipe member (6). The other end of the rotating shaft (701) is fixedly connected to a driving gear (703). A driven rack (504) meshing with the driving gear (703) is horizontally embedded at the top of the moving frame (501).

7. An MBBR sewage treatment reaction tank under anaerobic environment according to claim 1, characterized in that, A filter basin (8) is installed on the top surface of the transverse baffle (4). A through hole (801) for the biological rope (3) to pass through is opened at the bottom of the filter basin (8).

8. An MBBR sewage treatment reaction tank under anaerobic environment according to claim 7, characterized in that, A drain valve port (103) is installed at the bottom of the reaction tank (1), and a filler barrier net (104) is embedded at the top thereof.

9. An MBBR sewage treatment reaction tank under anaerobic environment according to claim 8, characterized in that, A one-way pumping pump (9) connected to the reaction tank (1) is installed on the back of the reaction tank (1). The liquid inlet of the one-way pumping pump (9) is located above the drain valve port (103), and the liquid outlet is located above the filter basin (8).

10. An MBBR sewage treatment reaction tank under anaerobic environment according to claim 7, characterized in that, Filler retaining nets (802) are rotatably installed on both sides inside the filter basin (8). Guide grooves (105) for forcing the filler retaining nets (802) to flip are vertically opened on the inner wall of the reaction tank (1). When the transverse baffle (4) moves downward, the filler retaining nets (802) are turned out of the filter basin (8).

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