A double-layer biofilm reactor for wastewater treatment

Abstract

The present invention discloses a double-layer biofilm reactor for wastewater treatment, which relates to the technical field of biofilm reactors and includes a main chamber. An oxygen supply pipe is communicated with the inside of the main chamber. There are two oxygen supply pipes, and a film hanging device is arranged inside the oxygen supply pipe. There are no less than two film hanging devices. An auxiliary chamber is fixedly connected to the outside of the main chamber; the opening and closing plate one and the opening and closing plate two are driven by a connecting shaft to move horizontally. At the same time when the opening and closing plate one and the opening and closing plate two move horizontally, the bracket is driven to move horizontally, so that when the film hanging device on the bracket needs to be cleaned, it is moved from the inside of the main chamber to the inside of the auxiliary chamber. The device of the present invention moves the film hanging device to the inside of the auxiliary chamber for cleaning through a moving component, reduces the steps of disassembling and reassembling the main chamber, reduces the wear on the components during the disassembly and reassembly of the main chamber, and improves the service life of the reactor.

Description

Technical Field

[0001] The present invention relates to the technical field of biofilm reactors, and more specifically, to a double-layer biofilm reactor for wastewater treatment. Background Art

[0002] The double-layer biofilm reactor in wastewater treatment is an efficient sewage treatment device that combines biofilm technology and an oxygen supply system. First, microorganisms are attached to the surface of the film-hanging component, and oxygen is introduced. Then, the wastewater is treated through the film-hanging component with the biofilm. The microorganisms grow on the film-hanging component to form a biofilm, which is responsible for degrading organic matter and pollutants in the wastewater.

[0003] Patent No. "CN109734198B" mentions a double-layer biofilm reactor for wastewater treatment, including a container body of the reactor. An inlet is provided at the lower part of the container body, which is connected to a feed pump through a pipeline. A continuous outlet is provided at the upper part of the container body. A stirring device is provided at the center of the bottom of the cavity of the container body. A hollow fiber membrane module serving as a biofilm carrier is arranged in the cavity of the container body, avoiding the stirring device. A water circulation outlet is provided at the upper part of the container body, and a water circulation inlet is provided at the lower part. The position of the water circulation outlet is lower than the continuous outlet. The water circulation outlet and the water circulation inlet are connected through a return water pipe, and a circulation pump is installed on the return water pipe, thus forming a water circulation system.

[0004] When it is necessary to clean the hollow fiber membrane module of the double-layer biofilm reactor for wastewater treatment, the entire reactor needs to be disassembled. However, during the frequent disassembly and reassembly of the reactor, the connection parts between its components are prone to wear. For example, the seal may be deformed or damaged due to multiple disassembly, resulting in a decrease in the sealing performance of the reactor. The pipeline joints may become loose or worn, affecting the normal flow of fluid in the reactor and even causing leakage, which affects the stable operation of the reactor and thus reduces the service life of the reactor.

[0005] To solve the above problems, the inventor has proposed a double-layer biofilm reactor for wastewater treatment. Summary of the Invention

[0006] To solve the above technical problems, a double-layer biofilm reactor for wastewater treatment is provided. This technical solution solves the problem of cleaning the hollow fiber membrane module mentioned in the above background art.

[0007] To achieve the above objectives, the present invention may adopt the following technical solutions:

[0008] The present invention provides a double - layer biofilm reactor for wastewater treatment, which includes a main chamber. An oxygen - supply pipe is connected to the inside of the main chamber. There are two oxygen - supply pipes, and a film - hanging device is arranged inside the oxygen - supply pipe. The number of the film - hanging devices is not less than two. An auxiliary chamber is fixedly connected to the outside of the main chamber. The shape of the auxiliary chamber is "I - shaped". An opening one is formed on the side of the auxiliary chamber close to the main chamber, and an opening two is formed on the side of the auxiliary chamber far from the main chamber. A moving component and a replacement component are arranged inside the oxygen - supply pipe and the auxiliary chamber, and a cleaning component is arranged inside the auxiliary chamber;

[0009] The moving component includes a servo - motor fixedly connected to the auxiliary chamber. The servo - motor is embedded in the auxiliary chamber. The output shaft of the servo - motor is fixedly connected to a connecting shaft. One end of the connecting shaft far from the servo - motor is fixedly connected to a gear one. Two racks one are arranged up and down outside the gear one. The upper rack one is fixedly connected to a connecting block one. The outer wall of the connecting block one is fixedly connected to an opening - closing plate one through a connecting plate. The lower rack one is fixedly connected to a connecting block two. The bottom surface of the connecting block two is fixedly connected to an opening - closing plate two. A sealing gasket is arranged between the opening - closing plate one and the opening - closing plate two. A synchronous wheel one is fixedly connected to the output shaft of the servo - motor. A synchronous wheel two is rotatably connected inside the auxiliary chamber. A threaded rod is fixedly connected to the synchronous wheel two. A threaded block is threadedly connected to the threaded rod. A bracket is fixedly connected to the bottom surface of the threaded block. One side of the bracket far from the threaded block is fixedly connected to a sliding plate. A sliding rod is slidably connected inside the sliding plate.

[0010] Preferably, the gear one is rotatably connected to the auxiliary chamber. A groove one is formed on the side of the auxiliary chamber close to the gear one, and a groove two is formed on the side of the auxiliary chamber far from the gear one. The two racks one are slidably connected to the groove one.

[0011] Preferably, the synchronous wheel one and the synchronous wheel two are connected by a synchronous belt. The threaded rod is rotatably connected to the main chamber. The bracket is "I - shaped", and both ends of the sliding rod are fixedly connected to the main chamber and the auxiliary chamber respectively.

[0012] Preferably, the cleaning component includes an electric contact rod fixedly connected to the upper surface of the bracket. Electric contact points are arranged on the electric contact rod. A butt - joint cylinder is fixedly connected inside the auxiliary chamber. An electrode plate and a photosensitive sensor are arranged inside the butt - joint cylinder. A cavity plate is fixedly connected inside the auxiliary chamber. The number of the cavity plates is not less than two. A plurality of nozzles are arranged on the cavity plate. A sewage discharge port is formed on the outer wall of the auxiliary chamber.

[0013] Preferably, the electric contact rod is inserted into the butt - joint cylinder. The cavity plate is externally connected to a hose. The other end of the hose is externally connected to a water pump, and the water pump is connected to a water storage bucket.

[0014] Preferably, the replacement component includes a fixed block fixedly connected inside the accessory bin. On one side of the fixed block away from the servo motor, a guide rod and a large compression spring are fixedly connected. There are two guide rods. A first slider is slidably connected to the guide rods. The bottom surface of the first slider is rotatably connected to a long connecting rod. There are two long connecting rods. One end of the long connecting rod away from the first slider is rotatably connected to an opening and closing door. The opening and closing door is made of a transparent material. A limiting plate is fixedly connected inside the accessory bin, and there are at least two limiting plates.

[0015] Preferably, a clamping block is fixedly connected to one end of the guide rod away from the fixed block. The large compression spring is fixedly connected to the first slider. The opening and closing door is slidably connected to a second groove opened inside the accessory bin.

[0016] Preferably, the replacement component further includes a rotating plate rotatably connected to the bracket. There are at least four rotating plates. A short connecting rod is rotatably connected to the surface of the rotating plate. There are two short connecting rods on the surface of each rotating plate. One end of the two short connecting rods away from the rotating plate respectively is rotatably connected to a second slider. The second slider is slidably connected to a guide rail. A clamping member is fixedly connected to the second slider. A groove plate is fixedly connected to the bracket. There are at least four groove plates. A follower plate is slidably connected inside the bracket. There are at least four follower plates. A small compression spring is fixedly connected between the follower plate and the bracket. A second rack is fixedly connected to the side wall of the follower plate. On the side of the second rack away from the follower plate, it is meshed with a second gear. A third synchronous pulley is fixedly connected to the second gear. Inside the bracket, a fourth synchronous pulley with the same number as the rotating plates is rotatably connected. The fourth synchronous pulley is coaxially fixedly connected to the rotating plate.

[0017] Preferably, both ends of the guide rail are fixedly connected to the bracket. The clamping member is located outside the film hanging device. The groove plate is in clamping fit with the film hanging device.

[0018] Preferably, the follower plate and the limiting plate are on the same horizontal line. The second gear is rotatably connected to the bracket. The second gear and the fourth synchronous pulley are connected by a synchronous belt.

[0019] As described above, the advantages of the present invention are:

[0020] The opening and closing plate one and the opening and closing plate two are driven to move horizontally through a connecting shaft. While the opening and closing plate one and the opening and closing plate two are moving horizontally, the bracket is driven to move horizontally, so that when the film hanging device on the bracket needs to be cleaned, it is moved from the inside of the main chamber to the inside of the accessory chamber. Compared with the prior art, when the film hanging device needs to be cleaned, the whole main chamber needs to be disassembled and then cleaned. In this device, the film hanging device is moved to the inside of the accessory chamber for cleaning through the moving component, reducing the steps of disassembling and reassembling the main chamber, reducing the wear on the components during the disassembly and reassembly of the main chamber, and increasing the service life of the reactor;

[0021] While the bracket is moving horizontally, the electrical contact on the electrical contact rod contacts the electrode plate, so that the bracket and the film hanging device stay between the two cavity plates, and the water pump is triggered to supply water to wash the surface of the film hanging device. The sewage and impurities generated during the washing process are discharged from the sewage outlet. Compared with the prior art, in which the washing is carried out inside the main chamber, this device can automatically trigger the water pump to supply water to wash the surface of the film hanging device, reducing manual intervention. And through the arranged sewage outlet, the sewage and impurities flow out from the sewage outlet of the accessory chamber, avoiding the pollution inside the main chamber;

[0022] Through the opening and closing door made of transparent material, the staff can observe whether the washed film hanging device is clean. If it is not clean and cannot handle the next batch of wastewater, the servo motor can be controlled to open the opening and closing door, and the clamping member releases the film hanging device, facilitating the replacement of the film hanging device. Compared with the prior art, in which the film hanging device is fixed with nuts during installation, resulting in inconvenient installation and disassembly, this device realizes the clamping and release of the film hanging device through the movement of the clamping member, avoiding the complex disassembly and assembly process during the replacement of the film hanging device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front three-dimensional schematic diagram of the overall structure shown in the present invention;

[0024] Figure 2 It is a partial cross-sectional three-dimensional schematic diagram of the main chamber and the accessory chamber shown in the present invention;

[0025] Figure 3 It is a three-dimensional schematic diagram of the servo motor, connecting shaft and related components shown in the present invention;

[0026] Figure 4 Shown in the present invention Figure 3 Partial enlarged three-dimensional schematic diagram of A therein;

[0027] Figure 5 It is a three-dimensional schematic diagram of the thread block, bracket and related components shown in the present invention;

[0028] Figure 6Schematic perspective view of the cleaning component shown in the present invention;

[0029] Figure 7 Schematic perspective view of the partially cut docking cylinder shown in the present invention;

[0030] Figure 8 Schematic perspective view of the components related to the fixing block shown in the present invention;

[0031] Figure 9 Schematic perspective view of the connection relationship between the clamping member and the film hanging device shown in the present invention;

[0032] Figure 10 Schematic perspective view of the partially cut bracket shown in the present invention;

[0033] Figure 11 Schematic perspective view of the bracket shown in the present invention;

[0034] Figure 12 Schematic perspective view of the bottom view of the bracket shown in the present invention;

[0035] Figure 13 Schematic exploded perspective view of the bracket and the film hanging device shown in the present invention.

[0036] Among them, the reference numerals in the present invention are:

[0037] 1. Main bin; 2. Oxygen supply pipe; 3. Film hanging device; 4. Auxiliary bin;

[0038] Moving component: 51. Servo motor; 52. Connecting shaft; 53. Gear 1; 54. Rack 1; 55. Connecting block 1; 56. Opening and closing plate 1; 57. Connecting block 2; 58. Opening and closing plate 2; 59. Synchronous pulley 1; 510. Synchronous pulley 2; 511. Threaded rod; 512. Threaded block; 513. Bracket; 514. Slide plate; 515. Slide rod;

[0039] Cleaning component: 61. Electric contact rod; 62. Docking cylinder; 63. Electrode plate; 64. Photosensitive sensor; 65. Cavity plate; 66. Sewage outlet;

[0040] Replacement component: 71. Fixing block; 72. Guide rod; 73. Large compression spring; 74. Slide block 1; 75. Long connecting rod; 76. Opening and closing door; 77. Limiting plate; 78. Rotating plate; 79. Short connecting rod; 710. Slide block 2; 711. Guide rail; 712. Clamping member; 713. Groove plate; 714. Follow-up plate; 715. Small compression spring; 716. Rack 2; 717. Gear 2; 718. Synchronous pulley 3; 719. Synchronous pulley 4. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Refer to Figures 1 to 13 As shown, it is an embodiment provided by the present invention, and a double-oxygen layer biofilm reactor for wastewater treatment provided will be elaborated in detail below:

[0043] Embodiment 1:

[0044] A double-oxygen layer biofilm reactor for wastewater treatment, as Figure 1 and Figure 2 shown, includes a main chamber 1. An oxygen supply pipe 2 is connected to the inside of the main chamber 1 for supplying oxygen to the microorganisms on the film hanging device 3. There are two oxygen supply pipes 2. A film hanging device 3 is arranged inside the oxygen supply pipe 2. The film hanging devices 3 are symmetrically arranged in not less than two. An auxiliary chamber 4 is fixedly connected to the outside of the main chamber 1. The shape of the auxiliary chamber 4 is "I". An opening one is provided on the side of the auxiliary chamber 4 close to the main chamber 1, and an opening two is provided on the side of the auxiliary chamber 4 away from the main chamber 1. A moving component and a replacement component are arranged inside the oxygen supply pipe 2 and the auxiliary chamber 4, and a cleaning component is arranged inside the auxiliary chamber 4;

[0045] As Figures 2 to 5 shown, the moving component includes a servo motor 51 fixedly connected to the auxiliary chamber 4. The servo motor 51 is embedded in the auxiliary chamber 4. The output shaft of the servo motor 51 is fixedly connected to a connecting shaft 52. One end of the connecting shaft 52 away from the servo motor 51 is fixedly connected to a gear one 53. Two racks one 54 are arranged outside the gear one 53 in an up-and-down manner. The upper rack one 54 is fixedly connected to a connecting block one 55. The outer wall of the connecting block one 55 is fixedly connected to an opening and closing plate one 56 through a connecting plate. The lower rack one 54 is fixedly connected to a connecting block two 57. The bottom surface of the connecting block two 57 is fixedly connected to an opening and closing plate two 58. The opening and closing plate one 56 and the opening and closing plate two 58 are in contact with each other and provided with a sealing gasket, and the sealing is good. A synchronous pulley one 59 is fixedly connected to the output shaft of the servo motor 51. A synchronous pulley two 510 is rotatably connected inside the auxiliary chamber 4. The synchronous pulley two 510 is located directly below the synchronous pulley one 59. A threaded rod 511 is coaxially fixedly connected to the synchronous pulley two 510. A threaded block 512 is threadedly connected to the threaded rod 511. A bracket 513 is fixedly connected to the bottom surface of the threaded block 512. A sliding plate 514 is fixedly connected to the side of the bracket 513 away from the threaded block 512. A sliding rod 515 is slidably connected inside the sliding plate 514.

[0046] Furthermore, asFigures 3 to 5 As shown, the first gear 53 is rotatably connected to the accessory bin 4. A first groove is formed on one side of the accessory bin 4 close to the first gear 53, and a second groove is formed on the side of the accessory bin 4 away from the first gear 53. Two first racks 54 are slidably connected to the first groove.

[0047] Further, as Figure 5 shown, the first synchronous pulley 59 and the second synchronous pulley 510 are connected by a synchronous belt for transmission. The threaded rod 511 is rotatably connected to the main bin 1. The bracket 513 is in the shape of a "work" character. Both ends of the sliding rod 515 are fixedly connected to the main bin 1 and the accessory bin 4 respectively.

[0048] Further, as Figures 6 to 8 shown, the cleaning assembly includes an electric contact rod 61 fixedly connected to the upper surface of the bracket 513. Electric contact points are arranged on the electric contact rod 61. A docking cylinder 62 is fixedly connected inside the accessory bin 4. An electrode plate 63 and a photosensitive sensor 64 are arranged inside the docking cylinder 62. A cavity plate 65 is fixedly connected inside the accessory bin 4. There are no less than two cavity plates 65. Multiple nozzles are arranged on the cavity plate 65. A sewage outlet 66 is formed on the outer wall of the accessory bin 4.

[0049] Further, as Figure 7 and Figure 8 shown, the electric contact rod 61 is inserted into the docking cylinder 62. The cavity plate 65 is externally connected with a hose, and the other end of the hose is externally connected with a water pump. When the electric contact points on the electric contact rod 61 contact the electrode plate 63, the water pump is started. The water pump is connected with a water storage bucket, and the water pump can extract the water in the water storage bucket. Scale lines are arranged in the water storage bucket. Before cleaning the film hanging device 3, the staff fills water into the interior of the water storage bucket and keeps the water level flush with the scale line. The amount of water at this scale line is the water consumption for cleaning the film hanging device 3.

[0050] This device can move the film hanging device 3 into the accessory bin 4 for cleaning. The detailed steps are as follows:

[0051] Before cleaning the film hanging device 3, the staff fills water into the water storage bucket and makes the water level line flush with the scale line in the water storage bucket;

[0052] When the wastewater treatment is completed in the main bin 1, the surface of the biofilm device 3 will be adsorbed with sediments generated during the wastewater degradation treatment process. At this time, the staff starts the servo motor 51, so that the output shaft of the servo motor 51 rotates forward, driving the connecting shaft 52 to rotate together with the output shaft of the servo motor 51. During the forward rotation of the connecting shaft 52, the gear 1 53 rotates counterclockwise with its own center of circle as the axis, driving the racks 1 54 on the upper and lower sides of the gear 1 53 to move horizontally along the groove 1 opened on the inner wall of the auxiliary bin 4. Specifically, the gear 1 53 rotates, driving the upper rack 1 54, connecting block 1 55 and opening and closing plate 1 56 to move horizontally in a direction away from the gear 1 53, and driving the lower rack 1 54, connecting block 2 57 and opening and closing plate 2 58 to move horizontally in a direction away from the gear 1 53. The opening and closing plates 1 56 and 2 58 gradually move away from each other from a closed state to an open state.

[0053] In the process of the opening and closing plate 1 56 and the opening and closing plate 2 58 gradually changing from the closed state to the open state, the synchronous wheel 1 59 on the output shaft of the servo motor 51 drives the synchronous wheel 2 510 through the synchronous belt, so that the synchronous wheel 2 510 rotates together with the output shaft of the servo motor 51. In the process of the synchronous wheel 2 510 rotating forward, the driving bracket 513 and the slide plate 514 at the bottom of the bracket 513 move horizontally along the slide bar 515 toward the side close to the attached warehouse 4. In the process of the bracket 513 moving horizontally along the slide bar 515 toward the side close to the attached warehouse 4, the electric contact rod 61 on the upper surface of the bracket 513 is gradually inserted into the docking tube 62. When the electric contact on the electric contact rod 61 contacts the electrode plate 63 inside the docking tube 62, When the water pump starts, the pure water in the water storage barrel is pumped to the hose, and then transported to the cavity plate 65 via the hose, so that the high-pressure water flow is sprayed out from the nozzle provided on the cavity plate 65 and sprayed to the film hanging device 3, thereby cleaning the sediment adsorbed on the surface of the film hanging device 3. When the staff observes the high-pressure water flow spraying out from the nozzle provided on the cavity plate 65 through the attached bin 4 made of transparent material, the servo motor 51 is turned off to stop the output shaft of the servo motor 51 from rotating, and further the bracket 513 and the film hanging device 3 in the bracket 513 are stopped between the two cavity plates 65 and are washed by the high-pressure water flow sprayed from the nozzle provided on the cavity plate 65. When the pure water in the water storage barrel is completely pumped out by the water pump, the cleaning of the film hanging device 3 is completed.

[0054] In the above steps, when the film-forming device 3 needs to be cleaned, the servo motor 51 is started, and the output shaft of the servo motor 51 rotates forward, driving the threaded rod 511 to move the film-forming device 3 horizontally to the inside of the auxiliary warehouse 4. Compared with the prior art, the film-forming device 3 is usually cleaned at a fixed period, and when cleaning the film-forming device 3, the entire main warehouse 1 needs to be manually disassembled, and then the film-forming device 3 is cleaned. The present device moves the film-forming device 3 to the inside of the auxiliary warehouse 4 for cleaning by moving the assembly, which reduces the steps of disassembling and reassembling the main warehouse 1, reduces the wear on the parts when disassembling and reassembling the main warehouse 1, and improves the service life of the reactor;

[0055] During the process of cleaning the surface of the film hanging device 3 with the high-pressure water flow sprayed from the nozzle arranged on the cavity plate 65, the generated sewage and impurities flow out from the sewage outlet 66 opened on the outer wall of the attached warehouse 4. In the above steps, by opening the sewage outlet 66 on the outer wall of the attached warehouse 4, compared with the prior art, during the cleaning of the attached warehouse 4, sewage and impurities are generated inside the main warehouse 1. The device can automatically trigger the water pump to supply water to clean the surface of the film hanging device 3, reducing manual intervention, and through the set sewage outlet 66, the sewage and impurities flow out from the sewage outlet 66 of the attached warehouse 4.

[0056] Embodiment 2:

[0057] like Figure 8 As shown, the replacement component includes a fixed block 71 fixedly connected to the attached warehouse 4, and a guide rod 72 and a large compression spring 73 are fixedly connected to the side of the fixed block 71 away from the servo motor 51. Two guide rods 72 are provided, and the large compression spring 73 is located between the guide rods 72. A slider 74 is slidably connected to the guide rod 72, and a long connecting rod 75 is rotatably connected to the bottom surface of the slider 74. Two long connecting rods 75 are provided, and an end of the long connecting rod 75 away from the slider 74 is rotatably connected to an opening and closing door 76. The initial state of the opening and closing door 76 is a mutually contacting closed state. The opening and closing door 76 is made of transparent material. The staff can observe whether the film hanging device 3 is cleaned through the opening and closing door 76 made of transparent material. A limiting plate 77 is fixedly connected to the attached warehouse 4, and the limiting plate 77 is located on the outside of the opening and closing door 76. No less than two limiting plates 77 are provided.

[0058] Further, such as Figure 8 As shown, one end of the guide rod 72 away from the fixed block 71 is fixedly connected with a clamping block, which is used to limit the horizontal movement of the slider 74 to ensure that the slider 74 will not separate from the guide rod 72. The large compression spring 73 is fixedly connected to the side of the slider 74 close to the fixed block 71. The initial state of the large compression spring 73 is a compressed state. The opening and closing door 76 is slidably connected to the groove 2 opened in the inner wall of the attached warehouse 4.

[0059] Further, such as Figures 9 to 13As shown in the figure, the replacement component further includes a rotating plate 78 rotatably connected to the bracket 513. There are at least four rotating plates 78. A short connecting rod 79 is rotatably connected to the surface of the rotating plate 78. There are two short connecting rods 79 on the surface of each rotating plate 78. The ends of the two short connecting rods 79 away from the rotating plate 78 are respectively rotatably connected to a second slider 710. The second slider 710 is slidably connected to a guide rail 711. A clamping member 712 is fixedly connected to the second slider 710. The initial state of the clamping member 712 is to clamp the film hanging device 3, and it is used to fixedly clamp the film hanging device 3. A groove plate 713 is fixedly connected to the bracket 513. There are at least four groove plates 713. A follower plate 714 is slidably connected inside the bracket 513. There are at least four follower plates 714. A small compression spring 715 is fixedly connected between the follower plate 714 and the bracket 513. The initial state of the small compression spring 715 is a compressed state. A second rack 716 is fixedly connected to the side wall of the follower plate 714. A second gear 717 is meshed and connected to the side of the second rack 716 away from the follower plate 714. A third synchronous pulley 718 is fixedly connected to the second gear 717. Inside the bracket 513, a fourth synchronous pulley 719 with the same number as the rotating plate 78 is rotatably connected. The fourth synchronous pulley 719 is coaxially fixedly connected to the rotating plate 78.

[0060] Further, as Figure 9 and Figure 12 shown, both ends of the guide rail 711 are fixedly connected to the bracket 513. The clamping member 712 is located outside the film hanging device 3. The groove plate 713 is in clamping fit with the film hanging device 3.

[0061] Further, as Figure 5 and Figure 10 shown, the follower plate 714 and the limiting plate 77 are on the same horizontal line. When the follower plate 714 contacts and moves with the limiting plate 77, since the limiting plate 77 is fixed, the limiting plate 77 will squeeze the follower plate 714 to move. The second gear 717 is rotatably connected to the bracket 513. The second gear 717 and the fourth synchronous pulley 719 are connected by a synchronous belt drive.

[0062] This device can replace the film hanging device 3. The detailed steps are as follows:

[0063] When the staff observes through the opening and closing door 76 made of transparent material that the film hanging device 3 cannot be cleaned thoroughly and thus a new film hanging device 3 needs to be replaced, the staff starts the servo motor 51 again to make the output shaft of the servo motor 51 rotate forward. Referring to the first embodiment, as the output shaft of the servo motor 51 rotates forward, the driving threaded rod 511 rotates forward, causing the bracket 513 and the film hanging device 3 to move horizontally from the position between the two cavity plates 65 towards the side close to the first slider 74. During the horizontal movement of the bracket 513 towards the side close to the first slider 74, the threaded block 512 will contact the first slider 74 and push the first slider 74, causing the first slider 74 to move horizontally along the large compression spring 73 towards the side close to the fixed block 71 and compress the large compression spring 73. Moreover, the long connecting rod 75 at the bottom of the first slider 74 will rotate and push the two opening and closing doors 76 to move horizontally along the second groove opened on the inner cavity wall of the accessory bin 4 towards the side away from the fixed block 71, making the two opening and closing doors 76 gradually change from the contact-closed state to the open state.

[0064] As the bracket 513 continuously moves the slider 74 horizontally towards the side close to the fixed block 71, the follower plate 714 inside the bracket 513 will contact the limit plate 77. Since the limit plate 77 remains stationary, it will push the follower plate 714, causing the follower plate 714 to move horizontally towards the side close to the small compression spring 715. During the process of the follower plate 714 moving horizontally towards the side close to the small compression spring 715, the small compression spring 715 is further compressed. The rack 716 on the outside of the follower plate 714 engages with the gear 717, causing the gear 717 to rotate. This will also drive the rotating plate 78 to rotate around the synchronous pulley 719 synchronously, causing the short connecting rod 79 to push the slider 710 to move horizontally along the guide rail 711 away from the rotating plate 78. During this process, the clamping member 712 outside the film hanging device 3 moves horizontally away from the film hanging device 3, causing the clamping member 712 to gradually loosen the film hanging device 3 until the electric contact rod 61 moves horizontally inside the docking cylinder 62 and reaches the position where the photosensitive sensor 64 is located. At this time, the light emitted by the photosensitive sensor 64 is blocked, and the output shaft of the servo motor 51 stops rotating. At this time, the opening and closing door 76 is in a fully open state, and the clamping member 712 completely disengages and loosens the film hanging device 3. The staff can pull out the film hanging device 3 to be replaced along the groove plate 713, push the new film hanging device 3 along the groove plate 713, and stop pushing when the film hanging device 3 cannot be pushed further. The staff starts the servo motor 51, causing the output shaft of the servo motor 51 to reverse and repeating the above steps in reverse. The bracket 513 moves horizontally back from the accessory bin 4 to the main bin 1, the opening and closing door 76 becomes closed, and the follower plate 714 disengages from the limit plate 77 and returns to its initial position. During this process, the small compression spring 715 rebounds to its initial length, the gear 717 reverses, driving the rotating plate 78 to reverse, causing the clamping member 712 to clamp and fix the new film hanging device 3. As the output shaft of the servo motor 51 continues to reverse, the opening plate 56 and the opening plate 58 come into contact and are in a closed state. When the bracket 513 moves back to its initial position, the staff turns off the servo motor 51, causing the bracket 513 and the film hanging device 3 to stay inside the main bin 1 for use in the next batch of wastewater treatment;

[0065] In the above steps, compared with the prior art, it is necessary to disassemble and assemble nuts to complete the replacement of the film hanging device 3. In this device, the replacement component can more conveniently and quickly complete the replacement of the old and new film hanging devices 3 through the movement of the clamping member 712, avoiding the complex disassembly and assembly process during the replacement of the film hanging device 3.

[0066] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-layer biofilm reactor for wastewater treatment, comprising a main chamber (1), an oxygen supply pipe (2) is communicated inside the main chamber (1), there are two oxygen supply pipes (2), a film hanging device (3) is arranged inside the oxygen supply pipe (2), and there are not less than two film hanging devices (3). The outer side of the main chamber (1) is fixedly connected with an auxiliary chamber (4), characterized in that, The shape of the auxiliary bin (4) is "I"-shaped. An opening one is provided on the side of the auxiliary bin (4) close to the main bin (1), and an opening two is provided on the side of the auxiliary bin (4) far from the main bin (1). A moving component and a replacement component are arranged inside the oxygen supply pipe (2) and the auxiliary bin (4), and a cleaning component is arranged inside the auxiliary bin (4); The moving component includes a servo motor (51) fixedly connected to the auxiliary bin (4). The servo motor (51) is embedded in the auxiliary bin (4). The output shaft of the servo motor (51) is fixedly connected with a connecting shaft (52). One end of the connecting shaft (52) far from the servo motor (51) is fixedly connected with a first gear (53). Two first racks (54) are arranged up and down outside the first gear (53). The upper first rack (54) is fixedly connected with a first connecting block (55). The outer wall of the first connecting block (55) is fixedly connected with a first opening and closing plate (56) through a connecting plate. The lower first rack (54) is fixedly connected with a second connecting block (57). The bottom surface of the second connecting block (57) is fixedly connected with a second opening and closing plate (58). A sealing gasket is arranged between the first opening and closing plate (56) and the second opening and closing plate (58). A first synchronous pulley (59) is fixedly connected to the output shaft of the servo motor (51). A second synchronous pulley (510) is rotatably connected inside the auxiliary bin (4). A threaded rod (511) is fixedly connected to the second synchronous pulley (510). A threaded block (512) is threadedly connected to the threaded rod (511). The bottom surface of the threaded block (512) is fixedly connected with a bracket (513). One side of the bracket (513) far from the threaded block (512) is fixedly connected with a sliding plate (514). A sliding rod (515) is slidably connected inside the sliding plate (514); The cleaning component includes an electric contact rod (61) fixedly connected to the upper surface of the bracket (513). Electric contact points are arranged on the electric contact rod (61). A docking cylinder (62) is fixedly connected inside the auxiliary bin (4). An electrode plate (63) and a photosensitive sensor (64) are arranged inside the docking cylinder (62). A cavity plate (65) is fixedly connected inside the auxiliary bin (4). A sewage discharge port (66) is provided on the outer wall of the auxiliary bin (4); The replacement component includes a fixed block (71) fixedly connected inside the auxiliary bin (4). A guide rod (72) and a large compression spring (73) are fixedly connected to the side of the fixed block (71) far from the servo motor (51). A first slider (74) is slidably connected to the guide rod (72). The bottom surface of the first slider (74) is rotatably connected with a long connecting rod (75). One end of the long connecting rod (75) far from the first slider (74) is rotatably connected with an opening and closing door (76). The opening and closing door (76) is made of a transparent material. A limiting plate (77) is fixedly connected inside the auxiliary bin (4); The replacement component further includes a rotating plate (78) rotatably connected to the bracket (513).

2. The double-layer biofilm reactor for wastewater treatment according to claim 1, characterized in that, The first gear (53) is rotatably connected to the accessory bin (4). A first groove is formed on one side of the accessory bin (4) close to the first gear (53), and a second groove is formed on the side of the accessory bin (4) away from the first gear (53). The two first racks (54) are slidably connected to the first groove.

3. The dual-layer biofilm reactor for wastewater treatment according to claim 1, characterized in that, The first synchronous pulley (59) is drivingly connected to the second synchronous pulley (510) by a synchronous belt. The threaded rod (511) is rotatably connected to the main bin (1). The bracket (513) is in the shape of "I". The two ends of the slide rod (515) are respectively fixedly connected to the main bin (1) and the accessory bin (4).

4. A double-layer biofilm reactor for wastewater treatment according to claim 1, characterized in that, There are at least two cavity plates (65), and a plurality of nozzles are arranged on the cavity plates (65).

5. A dual-layer biofilm reactor for wastewater treatment according to claim 4, characterized in that, The electric contact rod (61) is inserted into the docking cylinder (62). A hose is externally connected to the cavity plate (65), and the other end of the hose is externally connected to a water pump, and the water pump is communicated with a water storage bucket.

6. The dual-layer biofilm reactor for wastewater treatment according to claim 1, wherein There are two guide rods (72), two long connecting rods (75), and at least two limiting plates (77).

7. A double-layer biofilm reactor for wastewater treatment according to claim 6, characterized in that, A clamping block is fixedly connected to one end of the guide rod (72) away from the fixed block (71). The large compression spring (73) is fixedly connected to the first slider (74). The opening and closing door (76) is slidably connected to the second groove formed in the accessory bin (4).

8. A double-layer biofilm reactor for wastewater treatment according to claim 1, characterized in that, There are at least four rotating plates (78). A short connecting rod (79) is rotatably connected to the surface of the rotating plate (78). There are two short connecting rods (79) on the surface of each rotating plate (78). The two ends of the two short connecting rods (79) away from the rotating plate (78) are respectively rotatably connected to a second slider (710). The second slider (710) is slidably connected to a guide rail (711). A clamping member (712) is fixedly connected to the second slider (710). There are at least four groove plates (713) fixedly connected to the bracket (513). A follower plate (714) is slidably connected in the bracket (513). There are at least four follower plates (714). A small compression spring (715) is fixedly connected between the follower plate (714) and the bracket (513). A second rack (716) is fixedly connected to the side wall of the follower plate (714). A second gear (717) is meshed and connected to the side of the second rack (716) away from the follower plate (714). A third synchronous pulley (718) is fixedly connected to the second gear (717). There are as many fourth synchronous pulleys (719) rotatably connected in the bracket (513) as the number of rotating plates (78), and the fourth synchronous pulley (719) is coaxially and fixedly connected to the rotating plate (78).

9. A double-layer biofilm reactor for wastewater treatment according to claim 8, characterized in that, The two ends of the guide rail (711) are fixedly connected to the bracket (513). The clamping member (712) is located outside the film hanging device (3), and the groove plate (713) is in snap-fit connection with the film hanging device (3).

10. A double-layer biofilm reactor for wastewater treatment according to claim 8, characterized in that, The follower plate (714) and the limiting plate (77) are on the same horizontal line. The second gear (717) is rotatably connected to the bracket (513), and the second gear (717) is drivingly connected to the fourth synchronous pulley (719) by a synchronous belt.

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