Heavy metal ion filtration biological membrane system under three-property conditions

Abstract

The invention provides a heavy metal ion filtration biological membrane system under three-property conditions, and relates to the technical field of wastewater treatment.The heavy metal ion filtration biological membrane system comprises a base, a water distribution tank is fixed to the circle center of the top of the base, a delivery layer is fixed to the periphery, located at the bottom of the water distribution tank, of the base, a water inlet pipe is arranged at the circle center of the top of the water distribution tank, and a filter plate is fixedly installed in the water distribution tank; the device comprises a water distribution box, a delivery layer is arranged on the top of the water distribution box, drainage pipes are arranged on the outer side surface of the delivery layer at equal intervals, six filtering assemblies are arranged on the periphery of the top of the water distribution box, every two filtering assemblies form a group, and each filtering assembly comprises a biological membrane filtering box. According to the invention, one group of biological filler cylinders can be replaced or cleaned under the condition of not interrupting the operation of equipment, so that the filtration and adsorption performance of the biological filler cylinders can be recovered, the gap problem existing in the replacement process is avoided, and the overall water delivery amount and the treatment efficiency are not influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, specifically a heavy metal ion filtration biofilm system under three-property conditions. Background Art

[0002] Biofilms also have a certain purification effect on wastewater containing heavy metal ions and can be used for water pollution control and radioactive waste treatment. For example, in sewage treatment and its recycling technology, a filler is used as a carrier, and a biofilm is formed on the filler. The contaminated water source is passed through the filler, so that the water source contacts the biofilm on the filler, playing a purification role for the water source. To make the sewage meet the water quality requirements for discharging into a certain water body or being reused again, we need to purify it. A biofilm reactor is to add various fillers in the reactor so that microorganisms can attach and grow, forming a film-like structure composed of a layer of organisms on the filler, which is one of the main technologies for sewage biological treatment.

[0003] When the existing biofilm technology is used to treat wastewater containing heavy metal ions, microorganisms and organic substances will accumulate after long-term use, resulting in a decrease in its treatment efficiency. The common treatment method is to take out the biofilm filler from the wastewater treatment system, perform physical or chemical cleaning on the filler, or directly replace the filler to ensure its treatment efficiency. However, during this process, the equipment will stop running, the treatment efficiency of heavy metal wastewater will be reduced, and it is not convenient for people to check the condition of the biological filler in a timely manner, and it is not easy to master the replacement time. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a heavy metal ion filtration biofilm system under three-property conditions to solve the problems proposed in the above background art. The structure of the present invention is novel. By using a sub-water tank to distribute wastewater to two biofilm filtration tanks in the same group, it is possible to replace or clean one group of biological filler cylinders without interrupting the operation of the equipment, so as to restore its filtration and adsorption performance, avoid the gap problem during the replacement process, and will not affect the overall water supply volume and treatment efficiency.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: a heavy metal ion filtering biofilm system under three-property conditions, including a base. At the center of the top of the base, a water distribution tank is fixed, and a delivery layer is fixed around the bottom of the water distribution tank. At the center of the top of the water distribution tank, a water inlet pipe is provided, and a filter plate is fixedly installed inside the water distribution tank. Drain pipes are equidistantly arranged on the outer surface of the delivery layer. Six filtering components are provided around the top of the water distribution tank. The filtering components are grouped in pairs. Each filtering component includes a biofilm filtering box. A lower frame is slidably installed at the lower end of the biofilm filtering box. A connection port is provided at the position corresponding to the lower frame on the top of the delivery layer, and the bottom of the lower frame communicates with the connection port. A delivery pipe is installed at the top of the biofilm filtering box, and the other end of the delivery pipe is connected to the side of the water distribution tank at the bottom of the filter plate. A biological filler cylinder is fixed inside the lower frame, and the top of the biological filler cylinder slidably inserts into the biofilm filtering box. A triggering component is provided at the top of the biofilm filtering box. The triggering component includes a floating plate. The floating plate is arranged at the upper end of the biological filler cylinder, and a vertical rod is fixed at the top of the floating plate. The vertical rod slidably and sealingly passes through the top of the biofilm filtering box and the delivery pipe. A driving component is provided around the delivery layer. The driving component includes a pull rope. One end of the pull rope is slidably installed on the outer side of the delivery layer, and the other end of the pull rope is fixedly connected to the bottom of the lower frame.

[0006] Further, three first partition plates are equidistantly fixed inside the water distribution tank. The space between two of the first partition plates corresponds to the bottom of two biofilm filtering boxes. Six second partition plates are equidistantly fixed inside the delivery layer. The space between two of the second partition plates corresponds to the bottom of one biofilm filtering box.

[0007] Further, the filtering component further includes a mounting bracket. The mounting bracket is fixed to the outer side of the biofilm filtering box and is fixed to the top of the water distribution tank. Return springs are equidistantly fixed to the top of the lower frame, and the other ends of the return springs are fixedly connected to the outer wall of the bottom of the biofilm filtering box. A corrugated pipe is fixedly connected to the bottom of the lower frame, and the other end of the corrugated pipe is fixedly connected to the connection port.

[0008] Further, a return pipe is provided on one side of the biofilm filtering box. The other end of the return pipe communicates with the side of the water distribution tank at the top of the filter plate. A drain port is provided on the side of the biofilm filtering box. The return pipe is connected to the drain port.

[0009] Further, a vertical groove is provided on the inner wall of the biofilm filtering box corresponding to the drain port, and a baffle is slidably inserted into the vertical groove. The bottom of the baffle is fixedly connected to the lower frame.

[0010] Further, the triggering assembly further includes a suspension rope. The suspension ropes are fixed to both sides of the top of the floating board, and the other ends of the suspension ropes are fixedly connected to the inner wall of the top of the biofilm filtration tank. A valve plate is rotatably installed inside the delivery pipe, and the valve rod of the valve plate rotatably passes through the delivery pipe and is fixed with a winding base. The winding shafts of the winding bases on the top of the same group of biofilm filtration tanks wind the same traction rope through a torsion spring.

[0011] Further, a blocking frame is fixed to the top of the vertical rod. A side plate is fixed to the side of the winding base, and the blocking frame is in pressing contact with the side plate. The valve plate is arranged at a 45-degree angle inside the delivery pipe.

[0012] Further, the driving assembly further includes a sliding frame. The top of the feeding layer is rotatably installed with an annular sliding frame through a bearing. Sliders are slidably installed inside the sliding frame corresponding to the bottoms of each lower frame, and the pulling ropes are fixed to the tops of the sliders.

[0013] Further, friction strips are arranged on both sides of the slider, and a bidirectional electric push rod is arranged inside the slider. The extending ends of the bidirectional electric push rod inside the slider are fixedly connected to the friction strips.

[0014] Further, a toothed ring is fixed to the outside of the sliding frame. A motor is fixed to the outer wall of the feeding layer, and a gear is fixed to the output end of the motor. The gear is meshed with the toothed ring.

[0015] Advantages of the present invention: In the present invention, the bidirectional electric push rod inside the slider pushes the friction strips on both sides to be in frictional contact with the inner wall of the sliding frame. The sliders at the bottoms of the other groups of unblocked biofilm filtration tanks do not move. At this time, the motor drives the gear to rotate and mesh with the toothed ring, driving the entire sliding frame to rotate. Due to the fact that the sliders are in frictional contact with the inner wall of the sliding frame through the friction strips, the pulling ropes will pull the lower frames downward, pulling out the biological filler cylinders inside the blocked biofilm filtration tank downward, so as to facilitate manual cleaning or removal of the biological filler cylinders for replacement in a timely manner.

[0016] After the vertical plate moves upward in the present invention, the blocking frame is separated from the side plate. Thus, after the winding base is not restricted, it rotates through its own torsion spring to wind the traction rope. One of the winding bases at the upper ends of the two biofilm filtration tanks in the same group winds and the other unwinds. And the valve plates inside the two delivery pipes are initially in a 45-degree state. After rotation, the valve plate inside the delivery pipe of the blocked group of biofilm filtration tanks is completely closed, while the valve plate inside the delivery pipe of the other group of biofilm filtration tanks is completely opened. At this time, two semi-open pipes are combined into a fully open pipe, keeping the water flow rate unchanged and the wastewater treatment efficiency unchanged.

[0017] When the biological filler cartridge needs to be sent out due to blockage, the lower frame and the biological filler cartridge move downward, the baffle moves downward synchronously, and the vertical groove is opened. At this time, the wastewater originally accumulated on the top of the biological filler cartridge is sent back to the inside of the sub-water tank through the vertical groove and the drain port, and the sub-water tank re-transports the untreated wastewater to the inside of other biological membrane filtration boxes.

[0018] The space separated by the second partition board in the present invention corresponds to the water discharged from each group of biological membrane filtration boxes. The heavy metal content in the discharged wastewater is detected by a heavy metal detector. When the content exceeds the standard, it is determined that the treatment effect of the biological filler cartridge has decreased. Thus, the blocked biological filler cartridge is sent out and replaced according to the above-mentioned driving component and triggering component, replacing the original working mode of dividing into two with a group independently completing. In this way, the gap problem existing in the replacement process can be avoided, and the overall water delivery volume and treatment efficiency will not be affected.

[0019] Compared with the prior art, the present invention can distribute the wastewater to two biological membrane filtration boxes in the same group through the sub-water tank, so that the biological filler cartridge in one of the groups can be replaced or cleaned without interrupting the operation of the equipment to restore its filtration and adsorption performance, avoiding the gap problem existing in the replacement process, and not affecting the overall water delivery volume and treatment efficiency. Description of the Drawings

[0020] Figure 1 It is the system flow chart of the heavy metal ion filtration biological membrane system under the three characteristics conditions of the present invention; Figure 2 It is the overall structural schematic diagram of the heavy metal ion filtration biological membrane system under the three characteristics conditions of the present invention; Figure 3 It is the structural schematic diagram of the top of the base of the heavy metal ion filtration biological membrane system under the three characteristics conditions of the present invention; Figure 4 It is the structural schematic diagram of the outer end of the filtration component of the heavy metal ion filtration biological membrane system under the three characteristics conditions of the present invention; Figure 5 It is the structural schematic diagram of the triggering component of the heavy metal ion filtration biological membrane system under the three characteristics conditions of the present invention; Figure 6 It is the internal structural schematic diagram of the biological membrane filtration box of the heavy metal ion filtration biological membrane system under the three characteristics conditions of the present invention; Figure 7 It is the internal structural schematic diagram of the sub-water tank of the heavy metal ion filtration biological membrane system under the three characteristics conditions of the present invention; Figure 8 It is the structural schematic diagram of the driving component of the heavy metal ion filtration biological membrane system under the three characteristics conditions of the present invention; Figure 9 It is the internal schematic diagram of the sending layer of the heavy metal ion filtration biological membrane system under the three characteristics conditions of the present invention.

[0021] In the figure: 1. Base; 11. Sub-water tank; 12. Sending layer; 13. Water inlet pipe; 14. Drain pipe; 15. Connection port; 16. First partition board; 17. Filter plate; 18. Second partition board; 2. Filtering component; 21. Biological membrane filtration tank; 22. Lower frame; 23. Mounting rack; 24. Return spring; 25. Delivery pipe; 26. Return pipe; 27. Biological filler cylinder; 28. Vertical groove; 29. Drainage port; 210. Baffle; 211. Bellows; 3. Triggering component; 31. Floating plate; 32. Suspension rope; 33. Vertical rod; 34. Stop frame; 35. Side plate; 36. Valve plate; 37. Reel base; 38. Traction rope; 4. Driving component; 41. Motor; 42. Gear; 43. Pulling rope; 44. Slide block; 45. Slide frame; 46. Tooth ring; 47. Friction strip. Detailed implementation mode

[0022] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation modes.

[0023] Please refer to Figures 1 to 9, the present invention provides a technical solution: a heavy metal ion filtering biofilm system under three properties conditions, including a base 1. At the center of the top of the base 1, a water distribution tank 11 is fixedly installed, and at the outer periphery of the bottom of the water distribution tank 11, a delivery layer 12 is fixedly installed on the base 1. At the center of the top of the water distribution tank 11, a water inlet pipe 13 is provided, and a filter plate 17 is fixedly installed inside the water distribution tank 11. Drain pipes 14 are equidistantly arranged on the outer surface of the delivery layer 12. Six filtering components 2 are arranged on the outer periphery of the water distribution tank 11. The filtering components 2 are grouped in pairs of two. Each filtering component 2 includes a biofilm filtering box 21. A lower frame 22 is slidably installed at the lower end of the biofilm filtering box 21. A connection port 15 is provided at the position corresponding to the lower frame 22 on the top of the delivery layer 12, and the bottom of the lower frame 22 communicates with the connection port 15. A delivery pipe 25 is installed on the top of the biofilm filtering box 21, and the other end of the delivery pipe 25 is connected to the side surface of the water distribution tank 11 at the bottom of the filter plate 17. A biological filler cylinder 27 is fixedly installed inside the lower frame 22, and the top of the biological filler cylinder 27 slidably inserts into the inside of the biofilm filtering box 21. A trigger component 3 is arranged on the top of the biofilm filtering box 21. The trigger component 3 includes a floating plate 31. The floating plate 31 is arranged at the upper end of the biological filler cylinder 27, and a vertical rod 33 is fixedly installed on the top of the floating plate 31. The vertical rod 33 slidably and sealingly passes through the top of the biofilm filtering box 21 and the delivery pipe 25. A driving component 4 is arranged on the outer periphery of the delivery layer 12. The driving component 4 includes a pull rope 43. One end of the pull rope 43 is slidably installed on the outer side of the delivery layer 12, and the other end of the pull rope 43 is fixedly connected to the bottom of the lower frame 22. When using the device, wastewater is fed from the water inlet pipe 13, and large-particle floating substances are filtered by the sieve plate, then conveyed by the water distribution tank 11 to the inside of the six filtering components 2. After the heavy metal ions are adsorbed by the biological filler cylinder 27 inside the filtering component 2, the wastewater is discharged into the delivery layer 12 and then sent out through the drain pipes 14. Under the action of the trigger component 3 and the driving component 4, the biological filler cylinder 27 inside the filtering component 2 is detected. When the treatment efficiency of the biological filler cylinder 27 decreases, it is sent out for replacement.

[0024] In this embodiment, three first partition plates 16 are fixedly arranged at equal intervals inside the water distribution tank 11. The space between two adjacent first partition plates 16 corresponds to the bottom of two biofilm filtration tanks 21. Six second partition plates 18 are fixedly arranged at equal intervals inside the water delivery layer 12. The space between two adjacent second partition plates 18 corresponds to the bottom of one biofilm filtration tank 21. There are six biofilm filtration tanks 21, which are divided into two groups. The water distribution tank 11 distributes the wastewater into the two biofilm filtration tanks 21 in the same group. After the sewage is treated, the heavy metal ions are adsorbed inside the biological filler cylinder 27 and are sent into the water delivery layer 12 through the corrugated pipe 211, and then sent out through the drain pipe 14. There are two groups of monitoring methods in this solution, one is trigger type and the other is autonomous monitoring. First, when the treatment efficiency of the biological filler cylinder 27 in the biofilm filtration tank 21 decreases, the wastewater at the upper end of the biological filler cylinder 27 will gradually accumulate. There is a floating plate 31 inside, which moves upward under the buoyancy of water, blocking the water inlet. At the same time, the vertical rod 33 on the top of the floating plate 31 triggers the rotation of the winding seat 37 and the movement of the pull rope 43. The winding seats 37 connected to the two biofilm filtration tanks 21 at the top of the same group are connected to the same pull rope 43, and are both connected by torsion springs. And under the initial restriction of the vertical rod 33, the valve plates 36 in the respective delivery pipes 25 are opened at 45 degrees. The winding seat 37 at the top of one of the blocked biofilm filtration tanks 21 winds the pull rope 43, and the other group unwinds. As a result, the valve plate 36 of the blocked delivery pipe 25 closes, and the other group is fully opened, ensuring that the water flow rate and the efficiency of treating wastewater of the two groups remain unchanged all the time. The driving component 4 at the bottom of the blocked biofilm filtration tank 21 opens the lower frame 22, and the biological filler cylinder 27 installed on the lower frame 22 is pulled out from the lower end, and the remaining wastewater returns to the water distribution tank 11 again. It can replace or clean one of the biological filler cylinders 27 without interrupting the operation of the equipment to restore its filtration and adsorption performance; the second is autonomous monitoring. Specifically, a plurality of second partition plates 18 are arranged inside the water delivery layer 12. The space separated by the second partition plates 18 corresponds to the water discharged from each group of biofilm filtration tanks 21. The heavy metal content in the discharged wastewater is detected by a heavy metal detector. When the content exceeds the standard, it is determined that the treatment effect of the biological filler cylinder 27 has decreased. Then, according to the above-mentioned driving component 4 and triggering component 3, the blocked biological filler cylinder 27 is sent out for replacement, replacing the original working mode of dividing into two groups with one group independently completing the work. In this way, the gap problem during the replacement process can be avoided, and the overall water delivery volume and treatment efficiency will not be affected.

[0025] In this embodiment, the filtering component 2 further includes a mounting frame 23. The mounting frame 23 is fixed to the outside of the biofilm filtration tank 21, and the mounting frame 23 is fixed to the top of the water distribution tank 11. The top of the lower frame 22 is equidistantly fixed with reset springs 24, and the other ends of the reset springs 24 are fixedly connected to the bottom outer wall of the biofilm filtration tank 21. The bottom of the lower frame 22 is fixedly connected with a corrugated pipe 211, and the other end of the corrugated pipe 211 is fixedly connected to the connection port 15. A return pipe 26 is arranged on one side of the biofilm filtration tank 21. The other end of the return pipe 26 communicates with the side surface of the water distribution tank 11 located above the filter plate 17. A drain port 29 is formed in the side surface of the biofilm filtration tank 21. The return pipe 26 is connected to the drain port 29. A vertical groove 28 is formed in the inner wall of the biofilm filtration tank 21 corresponding to the drain port 29, and a baffle 210 is slidably inserted in the vertical groove 28. The bottom of the baffle 210 is fixedly connected to the lower frame 22. The lower frame 22 and the biofilm filtration tank 21 are kept as an integral tank body by the reset springs 24. At this time, the baffle 210 blocks the vertical groove 28. When the biological filler cylinder 27 is blocked and needs to be sent out, the lower frame 22 and the biological filler cylinder 27 move downward, and the baffle 210 moves downward synchronously. The vertical groove 28 is opened. At this time, the wastewater originally accumulated at the top of the biological filler cylinder 27 passes through the vertical groove 28 and the drain port 29 and is sent back to the inside of the water distribution tank 11 through the drain pipe 14. The water distribution tank 11 re-transports the untreated wastewater to the inside of other biofilm filtration tanks 21.

[0026] In this embodiment, the triggering assembly 3 further includes a suspension rope 32. The suspension ropes 32 are fixed to both sides of the top of the floating plate 31, and the other ends of the suspension ropes 32 are fixedly connected to the inner wall of the top of the biofilm filtration tank 21. A valve plate 36 is rotatably installed inside the delivery pipe 25, and the valve stem of the valve plate 36 rotatably passes through the delivery pipe 25 and is fixed with a winding base 37. The winding shaft of the winding base 37 on the top of the same group of biofilm filtration tanks 21 winds the same traction rope 38 through a torsion spring. A blocking frame 34 is fixed to the top of the vertical rod 33. A side plate 35 is fixed to the side of the winding base 37, and the blocking frame 34 is in pressing contact with the side plate 35. The valve plate 36 is arranged at a 45-degree angle inside the delivery pipe 25. After the biofilm filtration tank 21 is used for a long time, the treatment efficiency of the internal biological filler cylinder 27 decreases, and it may cause a decrease in the passing rate of the wastewater. As a result, the wastewater will gradually accumulate at the upper end of the biological filler cylinder 27 inside the biofilm filtration tank 21. At this time, the floating plate 31 moves upward by the buoyancy of water and blocks the delivery pipe 25. Here, a magnet that can adsorb the floating plate 31 is provided at the connection port 15 between the delivery pipe 25 and the biofilm filtration tank 21. After the floating plate 31 moves to the top, it will not drop again. Later, it can be manually reset. At the same time, the vertical rod 33 moves upward. Originally, the blocking frame 34 has a limiting effect on the side plate 35. After the vertical plate moves upward, the blocking frame 34 is separated from the side plate 35. Thus, after the winding base 37 is no longer restricted, it rotates through its own torsion spring to wind the traction rope 38. One of the winding bases 37 at the upper ends of the two biofilm filtration tanks 21 in the same group winds and the other unwinds. And the valve plates 36 inside the two delivery pipes 25 are initially in a 45-degree state. After rotation, the valve plate 36 inside the delivery pipe 25 of the blocked biofilm filtration tank 21 is completely closed, while the valve plate 36 inside the delivery pipe 25 of the other biofilm filtration tank 21 is completely opened. At this time, two semi-open pipes are combined into a fully open pipe, keeping the water flow rate unchanged and the treatment efficiency of the wastewater unchanged.

[0027] In this embodiment, the driving assembly 4 further includes a sliding frame 45. The top of the feeding layer 12 is rotatably mounted with an annular sliding frame 45 through a bearing. A slider 44 is slidably mounted in the sliding frame 45 corresponding to the bottom of each lower frame 22, and the pulling rope 43 is fixed to the top of the slider 44. Friction strips 47 are arranged on both sides of the slider 44, and a bidirectional electric push rod is arranged inside the slider 44. The extending end of the bidirectional electric push rod inside the slider 44 is fixedly connected to the friction strip 47. A toothed ring 46 is fixed to the outer side of the sliding frame 45. A motor 41 is fixed to the outer wall of the feeding layer 12, and a gear 42 is fixed to the output end of the motor 41. The gear 42 is meshed with the toothed ring 46. A sensor can be arranged on the triggering assembly 3. Whenever the triggering assembly 3 above a group of biological membrane filtration tanks 21 triggers a blockage warning, an electrical signal is transmitted to the lower slider 44 and the motor 41. The bidirectional electric push rod inside the slider 44 pushes the friction strips 47 on both sides to be in frictional contact with the inner wall of the sliding frame 45. The sliders 44 at the bottoms of the other groups of unblocked biological membrane filtration tanks 21 do not move. At this time, the motor 41 drives the gear 42 to rotate and mesh with the toothed ring 46, driving the entire sliding frame 45 to rotate. Due to the fact that the slider 44 is in frictional contact with the inner wall of the sliding frame 45 through the friction strips 47, the pulling rope 43 will pull the lower frame 22 downward, pulling the biological filler cylinder 27 inside the blocked biological membrane filtration tank 21 downward, so as to facilitate manual cleaning or removal of the biological filler cylinder 27 in time for replacement.

[0028] When using the device, wastewater is fed in from the water inlet pipe 13. The large-particle floating substances are filtered by the sieve plate and then transported to the inside of the six filtering components 2 by the water distribution tank 11. After the sewage is treated, heavy metal ions are adsorbed inside the biological filler cylinder 27 and are sent into and out of the sending and receiving layer 12 through the corrugated pipe 211, and then sent out through the drain pipe 14. There are two groups of monitoring methods in this solution, one is trigger type and the other is autonomous monitoring. First, when the treatment efficiency of the biological filler cylinder 27 in the biological membrane filtration box 21 decreases, after the biological membrane filtration box 21 is used for a long time, the treatment efficiency of the internal biological filler cylinder 27 decreases, and it may cause the passing rate of wastewater to decrease. As a result, wastewater will gradually accumulate at the upper end of the biological filler cylinder 27 inside the biological membrane filtration box 21. At this time, the floating plate 31 moves upward through the buoyancy of water and blocks the conveying pipe 25. Here, a magnet that can adsorb the floating plate 31 is provided at the connection port 15 between the conveying pipe 25 and the biological membrane filtration box 21. After the floating plate 31 moves to the top, it will not drop anymore. Later, it can be reset manually. At the same time, the vertical rod 33 moves upward. Originally, the blocking frame 34 has a limiting effect on the side plate 35. After the vertical plate moves upward, the blocking frame 34 is separated from the side plate 35. As a result, after the winding seat 37 has no restriction, it rotates through its own torsion spring to wind the traction rope 38. One of the winding seats 37 at the upper ends of the two biological membrane filtration boxes 21 in the same group winds and the other unwinds. And the valve plates 36 inside the two conveying pipes 25 are initially in a 45-degree state. After rotation, the valve plate 36 inside the conveying pipe 25 of the blocked biological membrane filtration box 21 is completely closed, while the valve plate 36 inside the conveying pipe 25 of the other biological membrane filtration box 21 is completely opened. At this time, two semi-open pipes are combined into a fully open pipe, keeping the water flow rate unchanged and the treatment efficiency of wastewater unchanged. Whenever the trigger component 3 above a group of biological membrane filtration boxes 21 triggers a blockage warning, an electrical signal is transmitted to the slider 44 and the motor 41 at the lower end. The bidirectional electric push rod inside the slider 44 pushes the friction strips 47 on both sides to frictionally contact the inner wall of the sliding frame 45. The sliders 44 at the bottoms of the other unblocked biological membrane filtration boxes 21 do not move. At this time, the motor 41 drives the gear 42 to rotate and engage with the toothed ring 46, driving the entire sliding frame 45 to rotate. Because the slider 44 frictionally contacts the inner wall of the sliding frame 45 through the friction strips 47, the pull rope 43 will pull the lower frame 22 downward, pulling out the biological filler cylinder 27 inside the blocked biological membrane filtration box 21, so as to facilitate manual cleaning or removal of the biological filler cylinder 27 for replacement in time;The second is autonomous monitoring. Specifically, there are multiple partition plates inside the delivery layer 12. The spaces separated by the partition plates correspond to the water discharged from each group of biofilm filtration tanks 21. The heavy metal content in the discharged wastewater is detected by a heavy metal detector. When the content exceeds the standard, it is determined that the treatment effect of the biological filler cylinder 27 has decreased. Then, according to the above-mentioned driving component 4 and triggering component 3, the blocked biological filler cylinder 27 is sent out for replacement, and the original working mode of dividing into two is replaced by a group to complete independently. In this way, the gap problem during the replacement process can be avoided, and the overall water delivery volume and treatment efficiency will not be affected.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms.

[0030] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Heavy metal ion filtering biofilm system under three-property conditions, including a base (1), characterized in that: At the center of the top of the base (1), a water distribution tank (11) is fixedly installed. And at the outer periphery of the bottom of the water distribution tank (11), a delivery layer (12) is fixedly installed on the base (1). At the center of the top of the water distribution tank (11), a water inlet pipe (13) is provided. And a filter plate (17) is fixedly installed inside the water distribution tank (11). On the outer surface of the delivery layer (12), drain pipes (14) are equidistantly arranged. At the outer periphery of the top of the water distribution tank (11), six filtering assemblies (2) are provided. The filtering assemblies (2) are grouped in pairs. Each filtering assembly (2) includes a biological membrane filtering tank (21). At the lower end of the biological membrane filtering tank (21), a lower frame (22) is slidably installed. At the position corresponding to the lower frame (22) on the top of the delivery layer (12), a connection port (15) is provided. And the bottom of the lower frame (22) communicates with the connection port (15). At the top of the biological membrane filtering tank (21), a delivery pipe (25) is installed. And the other end of the delivery pipe (25) is connected to the side of the water distribution tank (11) at the bottom of the filter plate (17). Inside the lower frame (22), a biological filler cylinder (27) is fixedly installed. And the top of the biological filler cylinder (27) slidably inserts into the inside of the biological membrane filtering tank (21). At the top of the biological membrane filtering tank (21), a triggering assembly (3) is provided. The triggering assembly (3) includes a floating plate (31). The floating plate (31) is arranged at the upper end of the biological filler cylinder (27). And at the top of the floating plate (31), a vertical rod (33) is fixedly installed. The vertical rod (33) slidably and sealingly passes through the tops of the biological membrane filtering tank (21) and the delivery pipe (25). At the outer periphery of the delivery layer (12), a driving assembly (4) is provided. The driving assembly (4) includes a pull rope (43). One end of the pull rope (43) is slidably installed on the outside of the delivery layer (12). And the other end of the pull rope (43) is fixedly connected to the bottom of the lower frame (22).

2. The heavy metal ion filtering biofilm system under the three-nature conditions according to claim 1, characterized in that: Inside the water distribution tank (11), three first partition plates (16) are fixedly installed equidistantly. The space between two of the first partition plates (16) corresponds to the bottoms of two biological membrane filtering tanks (21). Inside the delivery layer (12), six second partition plates (18) are fixedly installed equidistantly. The space between two of the second partition plates (18) corresponds to the bottom of one biological membrane filtering tank (21).

3. The heavy metal ion filtering biofilm system under the three characteristics conditions according to claim 1, characterized in that: Each filtering assembly (2) further includes a mounting frame (23). The mounting frame (23) is fixedly installed on the outside of the biological membrane filtering tank (21). And the mounting frame (23) is fixed to the top of the water distribution tank (11). At the top of the lower frame (22), reset springs (24) are fixedly installed equidistantly. And the other ends of the reset springs (24) are fixedly connected to the outer wall of the bottom of the biological membrane filtering tank (21). The bottom of the lower frame (22) is fixedly connected to a corrugated pipe (211). And the other end of the corrugated pipe (211) is fixedly connected to the connection port (15).

4. The heavy metal ion filtering biofilm system under the three characteristics conditions according to claim 3, wherein: One side of the biofilm filtration tank (21) is provided with a reflux pipe (26), the other end of the reflux pipe (26) is communicated with the side of the water distribution tank (11) located at the top of the filter plate (17), a drain port (29) is formed in the side of the biofilm filtration tank (21), and the reflux pipe (26) is connected to the drain port (29).

5. The heavy metal ion filtering biofilm system under the three-property conditions according to claim 4, characterized in that: A vertical groove (28) is formed in the inner wall of the biofilm filtration tank (21) corresponding to the drain port (29), and a baffle plate (210) is slidably inserted in the vertical groove (28), and the bottom of the baffle plate (210) is fixedly connected to the lower frame (22).

6. The heavy metal ion filtering biofilm system under the three property conditions according to claim 1, characterized in that: The trigger assembly (3) further includes a suspension rope (32), suspension ropes (32) are fixed to both sides of the top of the floating plate (31), and the other ends of the suspension ropes (32) are fixedly connected to the inner wall of the top of the biofilm filtration tank (21). A valve plate (36) is rotatably installed inside the delivery pipe (25), and the valve stem of the valve plate (36) rotatably passes through the delivery pipe (25) and is fixed with a winding seat (37). The winding shafts of the winding seats (37) at the top of the same group of biofilm filtration tanks (21) wind the same traction rope (38) through a torsion spring.

7. The heavy metal ion filtering biofilm system under the three-nature conditions according to claim 6, characterized in that: A blocking frame (34) is fixed to the top of the vertical rod (33), a side plate (35) is fixed to the side of the winding seat (37), and the blocking frame (34) is in pressing contact with the side plate (35). The valve plate (36) is arranged at a 45-degree angle inside the delivery pipe (25).

8. The heavy metal ion filtering biofilm system under the three properties conditions according to claim 1, characterized in that: The driving assembly (4) further includes a sliding frame (45). The top of the delivery layer (12) is rotatably installed with an annular sliding frame (45) through a bearing. Sliders (44) are slidably installed in the sliding frame (45) corresponding to the bottom of each lower frame (22), and a pull rope (43) is fixed to the top of the slider (44).

9. The heavy metal ion filtering biofilm system under the three-property conditions according to claim 8, wherein: Friction strips (47) are arranged on both sides of the slider (44), and a bidirectional electric push rod is arranged inside the slider (44). The extended ends of the bidirectional electric push rod inside the slider (44) are fixedly connected to the friction strips (47).

10. The heavy metal ion filtering biofilm system under the three properties conditions according to claim 9, characterized in that: A toothed ring (46) is fixed to the outside of the sliding frame (45), a motor (41) is fixed to the outer wall of the delivery layer (12), and a gear (42) is fixed to the output end of the motor (41). The gear (42) is meshed with the toothed ring (46).

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