A Moving Bed Biofilm Reactor and Method for Sewage Treatment

Abstract

The present invention discloses a moving bed biofilm reactor and method for sewage treatment, relating to the technical field of sewage treatment, including: a reactor body, a water inlet pipe is connected and installed on the outer wall of the reactor body, a filter is fixedly installed on the inner wall of the reactor body, and a drain pipe is fixedly installed on the top of the filter; an anti-floating device, the anti-floating device includes a stirring device, a partition plate, a reciprocating lead screw, a threaded block, a fixed rod, a pressing plate, floating fillers, a spiral ring, a spiral rod and a rotating plate. When the stirring device rotates, it will drive the reciprocating lead screw to rotate, the reciprocating lead screw rotates to drive the threaded block to move up and down reciprocally, and the up and down reciprocating movement of the threaded block will drive the pressing plate to move up and down reciprocally. When the pressing plate moves downward, it will push the floating fillers downward. The stirring device is fixedly installed at the bottom of the inner wall of the reactor body to prevent the sewage at the bottom of the water from being unable to be effectively treated, resulting in a reduction in the sewage treatment efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and specifically provides a moving bed biofilm reactor and method for sewage treatment. Background Art

[0002] The moving bed biofilm reactor is another innovative biofilm reactor that has received much attention from researchers in recent years. It was developed to solve the complex operations of fixed bed reactors that require regular backwashing, fluidized bed reactors that need to fluidize the carriers, and submerged biological filters that are blocked and require cleaning of the filter media and replacement of aerators.

[0003] The patent with the patent announcement number CN215798680U relates to a moving bed biofilm reactor for sewage treatment, including a moving bed biofilm reactor main body. One side of the moving bed biofilm reactor main body is fixedly connected with a control panel. An air inlet pipe is provided at the top of the moving bed biofilm reactor main body. A control motor is provided on one side of the air inlet pipe. A water inlet is installed on one side of the moving bed biofilm reactor main body. The other side of the moving bed biofilm reactor main body is fixedly connected with an outlet water tank. A water outlet pipe is installed on one side of the outlet water tank. One end of the air inlet pipe is fixedly connected with an air diffusion hole. One side inside the moving bed biofilm reactor main body is fixedly connected with a water outlet intercepting pipe. A partition is provided inside the outlet water tank. Suspended fillers are suspended inside the moving bed biofilm reactor main body. The device can prevent the suspended fillers from blocking the outlet by adjusting the height of the installation rod for agitation, and the rotating baffle adjusts the outlet size to be suitable for different models of suspended fillers.

[0004] In the above patent, agitation by adjusting the height of the installation rod can prevent the suspended fillers from blocking the outlet, and the rotating baffle adjusts the outlet size to be suitable for different models of suspended fillers. However, the suspended fillers may be difficult to effectively adsorb the microorganisms at the bottom of the water, resulting in a reduced adsorption effect on the sewage and affecting the biodegradation of the sewage. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a moving bed biofilm reactor and method for sewage treatment, which solves the problems raised in the above background art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A moving bed biofilm reactor for sewage treatment, comprising: a reactor body, a water inlet pipe is connected and installed on the outer wall of the reactor body, a filter is fixedly installed on the inner wall of the reactor body, and a drain pipe is fixedly installed on the top of the filter; an anti-floating device, the anti-floating device includes a stirring device, a partition plate, a reciprocating screw rod, a threaded block, a fixed rod, a pressing plate, floating packing, a spiral ring, a spiral rod and a rotating plate. When the stirring device rotates, it will drive the reciprocating screw rod to rotate. When the reciprocating screw rod rotates, it will drive the threaded block to move up and down reciprocally. When the threaded block moves up and down reciprocally, it will drive the pressing plate to move up and down reciprocally. When the pressing plate moves downward, it will push the floating packing downward. The stirring device is fixedly installed at the bottom of the inner wall of the reactor body, the partition plate is fixedly installed on the inner wall of the reactor body, the reciprocating screw rod is fixedly installed at the output end of the stirring device, the threaded block is threadedly installed on the surface of the reciprocating screw rod, the fixed rod is fixedly installed at the top of the inner wall of the reactor body, the fixed rod slidably penetrates the surface of the threaded block, the pressing plate is fixedly installed on the circumferential surface of the threaded block, the floating packing is arranged below the pressing plate, the spiral ring is rotatably installed on the inner wall of the pressing plate, the spiral rod is threadedly installed on the inner wall of the spiral ring, the spiral rod is fixedly installed at the top of the inner wall of the reactor body, the rotating plate is fixedly installed on the circumferential surface of the spiral ring. When the pressing plate moves up and down reciprocally, it will drive the spiral ring to move up and down reciprocally. When the spiral ring moves up and down reciprocally, it will be guided by the spiral rod, so that the spiral ring rotates during the up and down movement. When the spiral ring rotates, it will drive the rotating plate to rotate. When the rotating plate rotates, it will push the floating packing to move.

[0007] According to the above technical solution, a biofilm is attached to the surface of the floating packing. Microorganisms on the surface of the floating packing absorb dissolved organic matter, nitrogen, phosphorus and other nutrient components in the water, thereby realizing the biodegradation of sewage. The pressing plate is in contact with the surface of the floating packing, and the floating packing is pushed downward by the pressing plate.

[0008] According to the above technical solution, a scraping device for scraping impurities is arranged on the pressing plate, and a feeding device is arranged on the reactor body. The scraping device includes a fixed plate, a one-way rotating plate and a sliding scraper. When the pressing plate moves up and down reciprocally, it will drive the sliding scraper to move up and down reciprocally. When the sliding scraper moves upward, it will contact the one-way rotating plate. When the sliding scraper moves upward, it will push the one-way rotating plate to rotate upward. The fixed plate is fixedly installed on the inner wall of the reactor body, the one-way rotating plate is rotatably installed on the top of the fixed plate, and the sliding scraper is slidably installed on the top of the pressing plate.

[0009] According to the above technical solution, a connecting frame is fixedly installed on the side of the sliding scraper away from the filter, a fixing frame is fixedly installed on the top of the pressing plate, an L-shaped rotating plate is rotatably installed on the surface of the fixing frame, a rotating plate is fixedly installed on the side of the L-shaped rotating plate away from the fixing frame, a square plate is fixedly installed on the surface of the connecting frame, and when the connecting frame moves towards the filter, it will push the square plate to move towards the filter. When the square plate moves towards the filter, it will push the rotating plate to rotate upwards, and when the rotating plate rotates upwards, it will drive the L-shaped rotating plate to rotate downwards.

[0010] According to the above technical solution, a first torsion spring is arranged between the one-way rotating plate and the fixing plate to drive the one-way rotating plate to reset through the first torsion spring. A first spring is arranged between the sliding scraper and the pressing plate to drive the sliding scraper to reset through the first spring. The square plate is in contact with the surface of the rotating plate.

[0011] According to the above technical solution, the feeding device includes an elastic telescopic rod, a rotating plate, a sealing plate and a feeding box. When the connecting frame moves towards the filter, it drives the elastic telescopic rod to move towards the filter. When the elastic telescopic rod moves towards the filter, it will push the rotating plate to rotate. When the rotating plate rotates, it will drive the sealing plate to rotate. The elastic telescopic rod is fixedly installed on the surface of the connecting frame. The feeding box is fixedly installed on the top of the reactor body. The rotating plate is rotatably installed on the inner wall top of the reactor body. The sealing plate is fixedly installed on the surface of the rotating plate. There is a discharge port at the bottom of the feeding box.

[0012] According to the above technical solution, a sliding rod slidably penetrates through the bottom of the inner wall of the feeding box. An inclined block is fixedly installed at the bottom of the sliding rod. A connecting rod is fixedly installed on the circumferential surface of the sliding rod. A sealing circular plate is fixedly installed at the bottom of the connecting rod. A sealing ring is fixedly installed on the inner wall of the discharge port. A circular ring is fixedly installed on the inner wall of the discharge port. When the rotating plate rotates, it will push the inclined block to move upwards. When the inclined block moves upwards, it will drive the sliding rod to move upwards. When the sliding rod moves upwards, it will drive the connecting rod to move upwards. When the connecting rod moves upwards, it will drive the sealing circular plate to move upwards. When the sealing circular plate moves upwards, it will be separated from the circular ring.

[0013] According to the above technical solution, a second torsion spring is arranged between the rotating plate and the reactor body to drive the rotating plate to reset through the second torsion spring. A second spring is arranged between the feeding box and the sliding rod to drive the sliding rod to reset through the second spring. The sealing ring is arranged above the circular ring. The sealing circular plate is in contact with the surface of the circular ring.

[0014] A usage method of a moving bed biofilm reactor for sewage treatment includes the following steps:

[0015] Step 1: Transport sewage into the reactor body through the water inlet pipe, start the stirring device, and accelerate the sewage treatment efficiency through the rotation of the stirring device;

[0016] Step 2: The rotation of the stirring device drives the rotation of the reciprocating lead screw. The rotation of the reciprocating lead screw drives the threaded block to move up and down reciprocally. The up-and-down reciprocal movement of the threaded block drives the pressing plate to move up and down reciprocally. The downward movement of the pressing plate pushes the floating packing downward.

[0017] Step 3: The downward movement of the floating packing enables the surface microorganisms to absorb dissolved organic matter, nitrogen, phosphorus and other nutrient components in the water, thereby realizing the biodegradation of sewage and preventing the sewage at the bottom from being unable to be effectively treated, resulting in a reduction in sewage treatment efficiency.

[0018] Step 4: The up-and-down reciprocal movement of the pressing plate drives the up-and-down reciprocal movement of the spiral ring. The up-and-down reciprocal movement of the spiral ring is guided by the spiral rod, so that the spiral ring rotates during the up-and-down movement. The rotation of the spiral ring drives the rotating plate to rotate. The rotation of the rotating plate pushes the floating packing to move. By the movement of the floating packing, it is prevented that the floating packing is overly concentrated in certain areas, resulting in uneven distribution and affecting sewage treatment efficiency.

[0019] The present invention provides a moving bed biofilm reactor and method for sewage treatment. It has the following beneficial effects:

[0020] (1) In this invention, sewage is conveyed into the reactor body through the water inlet pipe, and the stirring device is started. The rotation of the stirring device will accelerate the sewage treatment efficiency. When the pressing plate moves downward, it will push the floating packing downward. The downward movement of the floating packing will enable the surface microorganisms to absorb dissolved organic matter, nitrogen, phosphorus and other nutrient components in the water, thereby realizing the biodegradation of sewage and preventing the sewage at the bottom from being unable to be effectively treated, resulting in a reduction in sewage treatment efficiency. At the same time, the rotation of the spiral ring will drive the rotating plate to rotate, and the rotation of the rotating plate will push the floating packing to move. By the movement of the floating packing, it is prevented that the floating packing is overly concentrated in certain areas, resulting in uneven distribution and affecting sewage treatment efficiency.

[0021] (2) In this invention, when the sliding scraper moves downward, it will contact the one-way rotating plate. The one-way rotating plate will form a restriction on the sliding scraper, so that the sliding scraper moves along the one-way rotating plate towards the filter. The filter is scraped by the sliding scraper to prevent impurities from adhering to the filter and affecting the discharge of the purified water. At the same time, it is prevented that the filter is continuously scraped, resulting in a decrease in the service life of the filter. At the same time, the movement of the square plate towards the filter will push the rotating plate to rotate upward. The upward rotation of the rotating plate will drive the L-shaped rotating plate to rotate downward. The downward rotation of the L-shaped rotating plate will dredge the holes on the pressing plate to prevent impurities from blocking in the holes and affecting the filtering effect.

[0022] (3) In this invention, when the elastic telescopic rod moves towards the filter, it will push the rotating plate to rotate. The rotation of the rotating plate will drive the sealing plate to rotate, and the rotation of the sealing plate will open the discharge port of the feeding box. Adding specific nutrients can promote the growth of microorganisms in the sewage and improve the efficiency of organic matter degradation. The sealing ring is sealed by the sealing circular plate to prevent continuous addition of nutrients. Intermittent addition can avoid excessive nutrients caused by continuous addition, thereby reducing the cost of chemical agent procurement and treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the overall sectional structure of the present invention;

[0025] Figure 3 For the present invention Figure 2 is an enlarged schematic diagram of the structure of part A in the present invention;

[0026] Figure 4 is a schematic diagram of the structure of the reciprocating lead screw and the threaded block of the present invention;

[0027] Figure 5 is a schematic diagram of the structure of the scraping device of the present invention;

[0028] Figure 6 is a schematic diagram of the sectional structure of the feeding box of the present invention;

[0029] Figure 7 is a schematic diagram of the structure of the sliding rod and the connecting rod of the present invention.

[0030] In the figure: 1, reactor body; 2, water inlet pipe; 3, filter; 4, drain pipe; 5, stirring device; 6, partition board; 7, reciprocating lead screw; 8, threaded block; 9, fixed rod; 10, pressing plate; 11, floating packing; 12, spiral ring; 13, spiral rod; 14, rotating plate; 151, fixing plate; 152, one-way rotating plate; 153, sliding scraper; 154, connecting frame; 155, fixing frame; 156, L-shaped rotating plate; 157, rotating plate; 158, square plate; 161, elastic telescopic rod; 162, rotating plate; 163, sealing plate; 164, feeding box; 165, sliding rod; 166, inclined block; 167, connecting rod; 168, sealing circular plate; 169, sealing ring; 1610, circular ring. DETAILED DESCRIPTION OF THE INVENTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1-4 , an embodiment of the present invention is: A moving bed biofilm reactor for sewage treatment, comprising: a reactor body 1, a water inlet pipe 2 is connected and installed on the outer wall of the reactor body 1, a filter 3 is fixedly installed on the inner wall of the reactor body 1, and a drain pipe 4 is fixedly installed on the top of the filter 3; an anti-floating device, the anti-floating device includes a stirring device 5, a partition plate 6, a reciprocating lead screw 7, a threaded block 8, a fixed rod 9, a pressing plate 10, floating packing 11, a spiral ring 12, a spiral rod 13 and a rotating plate 14. When the floating packing 11 moves downward, the surface microorganisms can absorb dissolved organic matter, nitrogen, phosphorus and other nutrients in the water, thereby realizing the biodegradation of sewage and preventing the sewage at the bottom from being unable to be effectively treated, resulting in a reduction in sewage treatment efficiency. The stirring device 5 is fixedly installed at the bottom of the inner wall of the reactor body 1, the partition plate 6 is fixedly installed on the inner wall of the reactor body 1, the reciprocating lead screw 7 is fixedly installed at the output end of the stirring device 5, the threaded block 8 is threadedly installed on the surface of the reciprocating lead screw 7, the fixed rod 9 is fixedly installed at the top of the inner wall of the reactor body 1, the fixed rod 9 slidably penetrates through the surface of the threaded block 8, the pressing plate 10 is fixedly installed on the circumferential surface of the threaded block 8, the floating packing 11 is arranged below the pressing plate 10, the spiral ring 12 is rotatably installed on the inner wall of the pressing plate 10, the spiral rod 13 is threadedly installed on the inner wall of the spiral ring 12, the spiral rod 13 is fixedly installed at the top of the inner wall of the reactor body 1, and the rotating plate 14 is fixedly installed on the circumferential surface of the spiral ring 12. By the movement of the floating packing 11, it is prevented that the floating packing 11 is overly concentrated in certain areas, resulting in uneven distribution and affecting the sewage treatment efficiency.

[0033] A biofilm adheres to the surface of the floating packing 11. The microorganisms on the surface of the floating packing 11 absorb dissolved organic matter, nitrogen, phosphorus and other nutrients in the water, thereby realizing the biodegradation of sewage. The pressing plate 10 is in contact with the surface of the floating packing 11, and the floating packing 11 is pushed downward by the pressing plate 10.

[0034] A method for using a moving bed biofilm reactor for sewage treatment includes the following steps:

[0035] Step 1: Transport sewage into the reactor body 1 through the water inlet pipe 2, and start the stirring device 5 to accelerate the sewage treatment efficiency by the rotation of the stirring device 5.

[0036] Step 2: The rotation of the stirring device 5 drives the rotation of the reciprocating lead screw 7. The rotation of the reciprocating lead screw 7 drives the up-and-down reciprocating movement of the threaded block 8. The up-and-down reciprocating movement of the threaded block 8 drives the up-and-down reciprocating movement of the pressing plate 10. The downward movement of the pressing plate 10 pushes the floating packing 11 downward.

[0037] Step 3: The downward movement of the floating packing 11 enables the surface microorganisms to absorb the dissolved organic matter, nitrogen, phosphorus and other nutrients in the water, thereby realizing the biodegradation of sewage and preventing the sewage at the bottom from being inefficiently treated, resulting in a reduction in the sewage treatment efficiency.

[0038] Step 4: The up-and-down reciprocating movement of the pressing plate 10 drives the up-and-down reciprocating movement of the spiral ring 12. The up-and-down reciprocating movement of the spiral ring 12 is guided by the spiral rod 13, causing the spiral ring 12 to rotate during the up-and-down movement. The rotation of the spiral ring 12 drives the rotation of the rotating plate 14. The rotation of the rotating plate 14 pushes the floating packing 11 to move. By the movement of the floating packing 11, it is prevented that the floating packing 11 is overly concentrated in certain areas, resulting in uneven distribution and affecting the sewage treatment efficiency.

[0039] During the operation of this embodiment, the sewage is transported into the reactor body 1 through the water inlet pipe 2. The stirring device 5 is started. The rotation of the stirring device 5 will accelerate the sewage treatment efficiency. At the same time, the rotation of the stirring device 5 will drive the rotation of the reciprocating lead screw 7. The rotation of the reciprocating lead screw 7 will drive the up-and-down reciprocating movement of the threaded block 8. The up-and-down reciprocating movement of the threaded block 8 will drive the up-and-down reciprocating movement of the pressing plate 10. When the pressing plate 10 moves downward, it will push the floating packing 11 downward. The downward movement of the floating packing 11 will enable the surface microorganisms to absorb the dissolved organic matter, nitrogen, phosphorus and other nutrients in the water, thereby realizing the biodegradation of sewage and preventing the sewage at the bottom from being inefficiently treated, resulting in a reduction in the sewage treatment efficiency. At the same time, the up-and-down reciprocating movement of the pressing plate 10 will drive the up-and-down reciprocating movement of the spiral ring 12. The up-and-down reciprocating movement of the spiral ring 12 is guided by the spiral rod 13, causing the spiral ring 12 to rotate during the up-and-down movement. The rotation of the spiral ring 12 will drive the rotation of the rotating plate 14. The rotation of the rotating plate 14 will push the floating packing 11 to move. By the movement of the floating packing 11, it is prevented that the floating packing 11 is overly concentrated in certain areas, resulting in uneven distribution and affecting the sewage treatment efficiency.

[0040] Please refer to Figure 1 - Figure 7, on the basis of the above embodiments, in another embodiment of the present invention, a scraping device for scraping impurities is provided on the pressing plate 10, and a feeding device is provided on the reactor body 1. The scraping device includes a fixing plate 151, a one-way rotating plate 152, and a sliding scraping plate 153. The fixing plate 151 is fixedly installed on the inner wall of the reactor body 1, the one-way rotating plate 152 is rotatably installed on the top of the fixing plate 151, and the sliding scraping plate 153 is slidably installed on the top of the pressing plate 10. The filter 3 is scraped by the sliding scraping plate 153 to prevent impurities from adhering to the filter 3, which affects the discharge of purified water. At the same time, continuous scraping of the filter 3 is prevented, which may lead to a decrease in the service life of the filter 3.

[0041] A connecting frame 154 is fixedly installed on the side of the sliding scraping plate 153 away from the filter 3, a fixing frame 155 is fixedly installed on the top of the pressing plate 10, an L-shaped rotating plate 156 is rotatably installed on the surface of the fixing frame 155, a rotating plate 157 is fixedly installed on the side of the L-shaped rotating plate 156 away from the fixing frame 155, a square plate 158 is fixedly installed on the surface of the connecting frame 154, and when the L-shaped rotating plate 156 rotates downward, the holes on the pressing plate 10 will be dredged to prevent impurities from clogging in the holes, which affects the filtering effect.

[0042] A first torsion spring is provided between the one-way rotating plate 152 and the fixing plate 151 to drive the one-way rotating plate 152 to reset through the first torsion spring. A first spring is provided between the sliding scraping plate 153 and the pressing plate 10 to drive the sliding scraping plate 153 to reset through the first spring. The square plate 158 is in contact with the surface of the rotating plate 157.

[0043] The feeding device includes an elastic telescopic rod 161, a rotating plate 162, a sealing plate 163, and a feeding box 164. The elastic telescopic rod 161 is fixedly installed on the surface of the connecting frame 154, the feeding box 164 is fixedly installed on the top of the reactor body 1, the rotating plate 162 is rotatably installed on the top inner wall of the reactor body 1, the sealing plate 163 is fixedly installed on the surface of the rotating plate 162, and an outlet is provided at the bottom of the feeding box 164. When the sealing plate 163 rotates, the outlet of the feeding box 164 will be opened. Adding specific nutrients can promote the growth of microorganisms in the sewage and improve the efficiency of degrading organic matter.

[0044] A sliding rod 165 slidably penetrates through the bottom inner wall of the feeding box 164, an inclined block 166 is fixedly installed at the bottom of the sliding rod 165, a connecting rod 167 is fixedly installed on the circumferential surface of the sliding rod 165, a sealing circular plate 168 is fixedly installed at the bottom of the connecting rod 167, a sealing ring 169 is fixedly installed on the inner wall of the outlet, and a circular ring 1610 is fixedly installed on the inner wall of the outlet. The sealing circular plate 168 seals the sealing ring 169 to prevent continuous feeding of nutrients. Intermittent feeding can avoid excessive nutrients caused by continuous feeding, thereby reducing the cost of reagent procurement and treatment.

[0045] A second torsion spring is provided between the rotating plate 162 and the reactor body 1, and the second torsion spring drives the rotating plate 162 to reset. A second spring is provided between the feeding box 164 and the sliding rod 165, and the second spring drives the sliding rod 165 to reset. The sealing ring 169 is arranged above the circular ring 1610, and the sealing circular plate 168 is in contact with the surface of the circular ring 1610.

[0046] During the operation of this embodiment, the reciprocating up and down movement of the pressing plate 10 drives the reciprocating up and down movement of the sliding scraper 153. When the sliding scraper 153 moves upward, it will contact the one-way rotating plate 152, and the upward movement of the sliding scraper 153 will push the one-way rotating plate 152 to rotate upward. When the sliding scraper 153 is separated from the one-way rotating plate 152, the first torsion spring will drive the one-way rotating plate 152 to reset. When the sliding scraper 153 moves downward, it will contact the one-way rotating plate 152, and the one-way rotating plate 152 will restrict the sliding scraper 153, causing the sliding scraper 153 to move along the one-way rotating plate 152 towards the filter 3. The filter 3 is scraped by the sliding scraper 153 to prevent impurities from adhering to the filter 3 and affecting the discharge of the purified water. At the same time, continuous scraping of the filter 3 is prevented to avoid a decrease in the service life of the filter 3. At the same time, when the sliding scraper 153 moves towards the filter 3, it will pull the connecting frame 154 towards the filter 3. The movement of the connecting frame 154 towards the filter 3 will push the square plate 158 towards the filter 3. The movement of the square plate 158 towards the filter 3 will push the rotating plate 157 to rotate upward. The upward rotation of the rotating plate 157 will drive the L-shaped rotating plate 156 to rotate downward. The downward rotation of the L-shaped rotating plate 156 will dredge the holes on the pressing plate 10 to prevent impurities from blocking the holes and affecting the filtering effect.

[0047] Moving the connecting frame 154 in the direction closer to the filter 3 drives the elastic telescopic rod 161 to move in the direction closer to the filter 3. The movement of the elastic telescopic rod 161 in the direction closer to the filter 3 pushes the rotating plate 162 to rotate. The rotation of the rotating plate 162 drives the sealing plate 163 to rotate. The rotation of the sealing plate 163 opens the discharge port of the feeding box 164. Adding a specific nutrient can promote the growth of microorganisms in the sewage and improve the efficiency of degrading organic matter. At the same time, the rotation of the rotating plate 162 pushes the inclined block 166 to move upward. The upward movement of the inclined block 166 drives the sliding rod 165 to move upward. The upward movement of the sliding rod 165 drives the connecting rod 167 to move upward. The upward movement of the connecting rod 167 drives the sealing circular plate 168 to move upward. The upward movement of the sealing circular plate 168 disengages from the ring 1610, allowing the nutrient in the discharge port to flow into the reactor body 1, promoting the growth of microorganisms in the sewage and improving the efficiency of degrading organic matter. At the same time, the upward movement of the sealing circular plate 168 contacts the sealing ring 169, sealing the sealing ring 169 through the sealing circular plate 168 to prevent continuous addition of nutrients. Intermittent addition can avoid excessive nutrients caused by continuous addition, thereby reducing the cost of chemical agent procurement and treatment.

[0048] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A moving bed biofilm reactor for sewage treatment, characterized in that, Comprising: A reactor body (1), a water inlet pipe (2) is connected and installed on the outer wall of the reactor body (1), a filter (3) is fixedly installed on the inner wall of the reactor body (1), and a drain pipe (4) is fixedly installed on the top of the filter (3); An anti-floating device, the anti-floating device includes a stirring device (5), a partition plate (6), a reciprocating lead screw (7), a threaded block (8), a fixed rod (9), a pressing plate (10), floating packing (11), a spiral ring (12), a spiral rod (13) and a rotating plate (14). The stirring device (5) is fixedly installed at the bottom of the inner wall of the reactor body (1), the partition plate (6) is fixedly installed on the inner wall of the reactor body (1), the reciprocating lead screw (7) is fixedly installed at the output end of the stirring device (5), the threaded block (8) is threadedly installed on the surface of the reciprocating lead screw (7), the fixed rod (9) is fixedly installed at the top of the inner wall of the reactor body (1), the fixed rod (9) slidably penetrates the surface of the threaded block (8), the pressing plate (10) is fixedly installed on the circumferential surface of the threaded block (8), the floating packing (11) is arranged below the pressing plate (10), the spiral ring (12) is rotatably installed on the inner wall of the pressing plate (10), the spiral rod (13) is threadedly installed on the inner wall of the spiral ring (12), the spiral rod (13) is fixedly installed at the top of the inner wall of the reactor body (1), and the rotating plate (14) is fixedly installed on the circumferential surface of the spiral ring (12); Wherein, a scraping device for scraping impurities is arranged on the pressing plate (10), and a feeding device is arranged on the reactor body (1).

2. A moving bed biofilm reactor for sewage treatment according to claim 1, characterized in that: A biological film is attached to the surface of the floating packing (11), and the pressing plate (10) is in contact with the surface of the floating packing (11).

3. A moving bed biofilm reactor for sewage treatment according to claim 2, characterized in that: The scraping device includes a fixing plate (151), a one-way rotating plate (152) and a sliding scraping plate (153). The fixing plate (151) is fixedly installed on the inner wall of the reactor body (1), the one-way rotating plate (152) is rotatably installed on the top of the fixing plate (151), and the sliding scraping plate (153) is slidably installed on the top of the pressing plate (10).

4. The moving bed biofilm reactor for sewage treatment according to claim 3, characterized in that: A connecting frame (154) is fixedly installed on the side of the sliding scraping plate (153) away from the filter (3), a fixing frame (155) is fixedly installed on the top of the pressing plate (10), an L-shaped rotating plate (156) is rotatably installed on the surface of the fixing frame (155), a rotating plate (157) is fixedly installed on the side of the L-shaped rotating plate (156) away from the fixing frame (155), and a square plate (158) is fixedly installed on the surface of the connecting frame (154).

5. A moving bed biofilm reactor for sewage treatment according to claim 4, characterized in that: A first torsion spring is arranged between the one-way rotating plate (152) and the fixing plate (151), a first spring is arranged between the sliding scraping plate (153) and the pressing plate (10), and the square plate (158) is in contact with the surface of the rotating plate (157).

6. The moving bed biofilm reactor for sewage treatment according to claim 5, characterized in that: The feeding device includes an elastic telescopic rod (161), a rotating plate (162), a sealing plate (163) and a feeding box (164). The elastic telescopic rod (161) is fixedly installed on the surface of the connecting frame (154). The feeding box (164) is fixedly installed on the top of the reactor body (1). The rotating plate (162) is rotatably installed on the top inner wall of the reactor body (1). The sealing plate (163) is fixedly installed on the surface of the rotating plate (162). The bottom of the feeding box (164) is provided with a discharge port.

7. A moving bed biofilm reactor for sewage treatment according to claim 6, characterized in that: A sliding rod (165) slidably penetrates through the bottom inner wall of the feeding box (164). An inclined block (166) is fixedly installed at the bottom of the sliding rod (165). A connecting rod (167) is fixedly installed on the circumferential surface of the sliding rod (165). A sealing circular plate (168) is fixedly installed at the bottom of the connecting rod (167). A sealing ring (169) is fixedly installed on the inner wall of the discharge port. A circular ring (1610) is fixedly installed on the inner wall of the discharge port.

8. A moving bed biofilm reactor for sewage treatment according to claim 7, characterized in that: A second torsion spring is provided between the rotating plate (162) and the reactor body (1). A second spring is provided between the feeding box (164) and the sliding rod (165). The sealing ring (169) is arranged above the circular ring (1610). The sealing circular plate (168) is in contact with the surface of the circular ring (1610).

9. A method for using a moving bed biofilm reactor for sewage treatment, which uses the moving bed biofilm reactor for sewage treatment described in claim 8, and is characterized in that, It includes the following steps: Step 1: Deliver sewage into the reactor body (1) through the water inlet pipe (2), and start the stirring device (5). The rotation of the stirring device (5) speeds up the efficiency of sewage treatment. Step 2: The rotation of the stirring device (5) drives the reciprocating lead screw (7) to rotate. The rotation of the reciprocating lead screw (7) drives the threaded block (8) to move up and down reciprocally. The up and down reciprocating movement of the threaded block (8) drives the pressing plate (10) to move up and down reciprocally. The pressing plate (10) moves downward to push the floating packing (11) downward. Step 3: The downward movement of the floating packing (11) enables the surface microorganisms to absorb dissolved organic substances, nitrogen, phosphorus and other nutrient components in the water, thereby realizing the biodegradation of sewage and preventing the sewage at the bottom of the water from being effectively treated, resulting in a reduction in the sewage treatment efficiency. Step 4: The up and down reciprocating movement of the pressing plate (10) drives the spiral ring (12) to move up and down reciprocally. The up and down reciprocating movement of the spiral ring (12) is guided by the spiral rod (13), so that the spiral ring (12) rotates during the up and down movement. The rotation of the spiral ring (12) drives the rotating plate (14) to rotate. The rotation of the rotating plate (14) pushes the floating packing (11) to move. Through the movement of the floating packing (11), it is prevented that the floating packing (11) is overly concentrated in certain areas, resulting in uneven distribution and affecting the sewage treatment efficiency.

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