Waste paper papermaking wastewater treatment device

Abstract

The invention relates to the technical field of wastewater treatment, and in particular to a waste paper papermaking wastewater treatment device, comprising a main body shell of a rectangular structure, an empty slot being provided at the upper end of the main body shell, a mobile electrolysis mechanism for electrochemically treating wastewater in the main body shell being arranged on the upper end surface of the main body shell, the mobile electrolysis mechanism comprising two first limiting slots symmetrically arranged at the upper end of the main body shell, telescopic ends of two first electric telescopic rods being fixedly connected with a first fixed body, the first fixed body being provided with a second limiting slot, a collecting mechanism for collecting suspended matter in real time being arranged at a position close to one side at the upper end of the main body shell; a battery can always supply power to an anode rod through the second limiting body, so as to ensure that organic pollutants in wastewater in the empty slot can be completely removed, thereby improving the reliability of the device, a cathode plate being connected to a negative pole of a battery through an electric wire, and a cathode plate of a filter screen structure being able to generate a large number of bubbles, which can wrap fine impurities in the wastewater.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a wastewater treatment device for waste paper making. Background Art

[0002] Papermaking wastewater refers to wastewater generated during the pulping and papermaking process. This type of wastewater has complex components and poor biodegradability. It is one of the more difficult industrial wastewaters to treat and is also a major source of industrial pollution in my country. Papermaking wastewater contains a large amount of organic pollutants. How to separate and recycle organic pollutants in papermaking wastewater is a key issue in wastewater treatment. There are methods of treating it through electrochemical technology in the prior art. Electrochemical oxidation is an advanced oxidation technology that uses strong oxidizing substances generated during the electrolysis process to degrade organic pollutants in wastewater. Electrochemical oxidation is usually carried out in an electrolytic cell. By applying an electric field, the pollutants are oxidized and decomposed into substances such as nitrogen dioxide at the anode, and a large amount of hydrogen is produced at the cathode.

[0003] Existing electrochemical oxidation devices generally include an anode rod and a cathode rod, which are directly fixed in the wastewater. After power is turned on, organic pollutants are oxidized and decomposed near the anode rod. When used for a long time, more carbon dioxide is decomposed near the anode rod, which will reduce the contact area between the anode rod and the wastewater, thereby reducing the speed of anode oxidation decomposition of pollutants. In addition, the fixed anode rod cannot completely treat the organic pollutants in the wastewater. The bubbles generated by the anode rod and the cathode rod will absorb very small impurities in the wastewater during the rising process, and then float on the surface of the wastewater. The existing technology cannot collect suspended matter on the surface of the wastewater in time, resulting in the suspended matter on the surface being likely to dissolve again in the wastewater. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a waste paper papermaking wastewater treatment device.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a waste paper papermaking wastewater treatment device, comprising a main body shell of a rectangular structure, an empty groove is opened at the upper end of the main body shell, and a mobile electrolysis mechanism for electrochemically treating the wastewater in the main body shell is arranged on the upper end surface of the main body shell, and the mobile electrolysis mechanism comprises two first limiting grooves symmetrically opened at the upper end of the main body shell, and first limiting bodies are respectively slidably arranged in the two first limiting grooves, and the upper ends of the two first limiting bodies are respectively fixedly connected with first electric telescopic rods, and the telescopic ends of the two first electric telescopic rods are fixedly connected with first fixed bodies, and the lower end of the first fixed body is opened with a second limiting groove, and a second limiting body is slidably arranged in the second limiting groove, and the upper end of the main body shell is provided with a collecting mechanism for collecting suspended matter in real time at a position close to one side, and a water outlet is opened on the side of the main body shell, and a adapter is matched and connected in the water outlet.

[0006] Preferably, two first motors are symmetrically arranged on the side of the main body shell, and the transmission shaft ends of the two first motors are fixedly connected with first threaded rods in the first limiting grooves, and the two first threaded rods are respectively arranged with the first limiting body by threaded cooperation, and the side of the first fixed body is fixedly connected with a second motor, and the transmission shaft end of the second motor is fixedly connected with a second threaded rod in the second limiting groove, and the second threaded rod is arranged with the second limiting body by threaded cooperation.

[0007] Preferably, the lower end of the second limiting body is fixedly connected to the anode rod, the first fixed body is symmetrically provided with a third limiting groove communicating with the second limiting groove, the first fixed body is symmetrically provided with a first placement groove communicating with the third limiting groove, the first fixed body is fixedly connected with a first conductive plate at a position above the first placement groove, the upper end of the first conductive plate is fixedly connected with a conductive column, and the upper end of the first fixed body is fixedly connected with a battery connected to the conductive column through an electric wire.

[0008] Preferably, a number of equally spaced conductive springs are fixedly connected to the two first placement grooves respectively, and the lower ends of the several conductive springs are fixedly connected to two second conductive plates that slideably cooperate with the first placement grooves, and the upper end of the second limiting body is fixedly connected to two third limiting bodies that slideably cooperate with the third limiting grooves, and the upper ends of the two third limiting bodies are respectively in contact with the second conductive plates.

[0009] Preferably, the second limiting body is made of conductive material, the first fixing body and the second threaded rod are made of insulating material, a cathode plate is fixedly connected inside the main body shell, the cathode plate is made of conductive material, and the cathode plate is connected to the battery through wires.

[0010] Preferably, the sides of the two first limiting bodies are fixedly connected to a second fixing body, the lower ends of the second fixing bodies are provided with a fourth limiting groove, the upper ends of the second fixing bodies are fixedly connected to a second electric telescopic rod, the telescopic end of the second electric telescopic rod is fixedly connected to a pressure sensor, and the lower end of the pressure sensor is fixedly connected to a first scraper that slidably cooperates with the fourth limiting groove.

[0011] Preferably, the collecting mechanism includes a mobile accommodating shell, the upper end of the mobile accommodating shell is an open structure, the mobile accommodating shell is arranged on the side of the main shell by bolts, the upper end of the mobile accommodating shell is flush with the upper end of the main shell, and the main shell is provided with a second placement groove on the side close to the mobile accommodating shell, and two fifth limiting grooves are symmetrically provided in the second placement groove, and third electric telescopic rods are respectively fixedly connected to the two fifth limiting grooves, and the telescopic ends of the two third electric telescopic rods are fixedly connected to support plates.

[0012] Preferably, the upper end of the support plate is fixedly connected to two third fixed bodies at a position close to the side, the two third fixed bodies are respectively provided with a sixth limiting groove, the two sixth limiting grooves are respectively fixedly connected to a third motor, the transmission shaft ends of the two third motors are respectively fixedly connected to a third threaded rod, the sides of the two third threaded rods are respectively provided with a fourth limiting body through threaded cooperation, the two fourth limiting bodies are respectively slidably cooperated with the sixth limiting groove, the inward sides of the two fourth limiting bodies are fixedly connected to a second scraper, and the support plate is a biofilm structure.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The two first motors drive the first threaded rod to rotate respectively, and the two first threaded rods drive the first limiting body to move back and forth left and right respectively, so that the anode rod can penetrate the wastewater. At the same time, the second motor drives the second threaded rod to rotate, and the second threaded rod cooperates to drive the second limiting body to move along the second limiting groove. While moving, the third limiting body at the upper end of the second limiting body cooperates with the third limiting groove to move. The upper end of the first conductive plate is connected to the second conductive plate through a conductive spring, and the second conductive plate is connected to the third limiting body. It can be ensured that during the movement of the second limiting body, the battery can always supply power to the anode rod through the second limiting body, so that the anode rod can be moved to any position in the empty slot, ensuring that the organic pollutants in the wastewater in the empty slot can be completely removed, thereby improving the reliability of the device. At the same time, the cathode plate is connected to the negative pole of the battery through an electric wire. During the wastewater treatment process, the cathode plate of the filter structure can generate a large number of bubbles. These bubbles wrap the fine impurities in the wastewater during the floating process and make them rise to the liquid surface, which is convenient for salvaging and cleaning them.

[0015] 2. The second electric telescopic rod drives the first scraper to move downward. When the lower end of the first scraper contacts the liquid surface, the pressure sensor controls the second electric telescopic rod to stop extending. When the first motor drives the first fixed body to move toward the collecting mechanism, the first scraper moves the impurities on the liquid surface to the vicinity of the collecting mechanism. In the process of returning, the second electric telescopic rod contracts to prevent the first scraper from stirring the wastewater. Then the third electric telescopic rod drives the support plate to move upward. Since the support plate is a biofilm structure, it can filter out fine impurities wrapped in bubbles. Then the third motor drives the third threaded rod to rotate, and the third threaded rod cooperates to drive the fourth limiter to move toward the movable containing shell. The fourth limiter drives the second scraper to scrape the impurities into the movable containing shell for collection, so that floating impurities can be collected during the electrochemical treatment of wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 The present invention is a sectional view of the whole Figure 1 ;

[0018] Figure 3 It is a partial cross-sectional view of the present invention;

[0019] Figure 4 The present invention is a sectional view of the whole Figure 2 ;

[0020] Figure 5 For the present invention Figure 2 A magnified image of point A;

[0021] Figure 6 For the present invention Figure 3 The enlarged view of point B;

[0022] Figure 7 For the present invention Figure 4 Enlarged view of point C;

[0023] Figure 8 For the present invention Figure 4 Enlarged view of point D.

[0024] 1. Main body shell; 11. Empty slot; 2. Mobile electrolysis mechanism; 3. Collecting mechanism; 4. Water outlet; 41. Adapter; 21. First limiting slot; 22. First threaded rod; 23. First motor; 24. Cathode plate; 25. Battery; 26. Second limiting body; 27. Second threaded rod; 28. First fixed body; 29. ​​Second limiting slot; 210. First electric telescopic rod; 211. First limiting body; 212. Anode rod; 213. First conductive plate; 214. First placement slot; 215. Conductive spring; 216. Second conductive plate; 2 17. The third limiting groove; 218. The third limiting body; 219. The conductive column; 220. The second electric telescopic rod; 221. The second fixed body; 222. The fourth limiting groove; 223. The first scraper; 224. The pressure sensor; 225. The second motor; 31. The movable containing shell; 32. The second placement groove; 33. The fifth limiting groove; 34. The third electric telescopic rod; 35. The supporting plate; 36. The third fixed body; 37. The sixth limiting groove; 38. The third motor; 39. The third threaded rod; 310. The fourth limiting body; 311. The second scraper. DETAILED DESCRIPTION

[0025] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0026] See also Figure 1 - Figure 8A waste paper papermaking wastewater treatment device includes a main body shell 1 of a rectangular structure, an upper end of the main body shell 1 is provided with an empty groove 11, and the upper end surface of the main body shell 1 is provided with a mobile electrolysis mechanism 2 for electrochemically treating the wastewater in the main body shell 1.

[0027] In this embodiment, the mobile electrolysis mechanism 2 includes two first limiting grooves 21 symmetrically opened at the upper end of the main body shell 1, and the first limiting bodies 211 are respectively slidably arranged in the two first limiting grooves 21, and the upper ends of the two first limiting bodies 211 are respectively fixedly connected with the first electric telescopic rods 210, and the telescopic ends of the two first electric telescopic rods 210 are fixedly connected with the first fixed body 28, and the lower end of the first fixed body 28 is opened with a second limiting groove 29, and the second limiting body 26 is slidably arranged in the second limiting groove 29.

[0028] Two first motors 23 are symmetrically arranged on the side of the main body shell 1, and the transmission shaft ends of the two first motors 23 are fixedly connected with the first threaded rods 22 in the first limiting groove 21, and the two first threaded rods 22 are respectively arranged with the first limiting body 211 through threaded cooperation, and the side of the first fixed body 28 is fixedly connected with the second motor 225, and the transmission shaft end of the second motor 225 is fixedly connected with the second threaded rod 27 in the second limiting groove 29, and the second threaded rod 27 is arranged with the second limiting body 26 through threaded cooperation.

[0029] The lower end of the second limiting body 26 is fixedly connected to the anode rod 212, the first fixed body 28 is symmetrically provided with a third limiting groove 217 which is communicated with the second limiting groove 29, the first fixed body 28 is symmetrically provided with a first placement groove 214 which is communicated with the third limiting groove 217, the first fixed body 28 is fixedly connected with a first conductive plate 213 at a position above the first placement groove 214, the upper end of the first conductive plate 213 is fixedly connected with a conductive column 219, and the upper end of the first fixed body 28 is fixedly connected with a battery 25 which is connected to the conductive column 219 via an electric wire.

[0030] A number of equidistantly arranged conductive springs 215 are fixedly connected to the two first placement grooves 214 respectively, and the lower ends of the several conductive springs 215 are fixedly connected to two second conductive plates 216 that slide with the first placement grooves 214. The upper end of the second limiting body 26 is fixedly connected to two third limiting bodies 218 that slide with the third limiting grooves 217, and the upper ends of the two third limiting bodies 218 are in contact with the second conductive plates 216 respectively.

[0031] The second limiting body 26 is made of conductive material, the first fixing body 28 and the second threaded rod 27 are made of insulating material, a cathode plate 24 is fixedly connected inside the main shell 1, the cathode plate 24 is made of conductive material, and the cathode plate 24 is connected to the battery 25 through wires.

[0032] A second fixed body 221 is fixedly connected to the side surfaces of the two first limiting bodies 211, a fourth limiting groove 222 is provided at the lower end of the second fixed body 221, a second electric telescopic rod 220 is fixedly connected to the upper end of the second fixed body 221, a pressure sensor 224 is fixedly connected to the telescopic end of the second electric telescopic rod 220, and a first scraper 223 slidably matched with the fourth limiting groove 222 is fixedly connected to the lower end of the pressure sensor 224.

[0033] Specifically, the two first motors 23 respectively drive the first threaded rod 22 to rotate, and the two first threaded rods 22 respectively drive the first limiting body 211 to move back and forth left and right, so that the anode rod 212 can penetrate the wastewater. At the same time, the second motor 225 drives the second threaded rod 27 to rotate, and the second threaded rod 27 cooperates to drive the second limiting body 26 to move along the second limiting groove 29. While moving, the third limiting body 218 at the upper end of the second limiting body 26 cooperates with the third limiting groove 217 to move, and the upper end of the first conductive plate 213 is connected to the second conductive plate 216 through the conductive spring 215, and the second conductive plate 216 is connected to the third limiting body 218, which can ensure that during the movement of the second limiting body 26, the battery 25 can always power the anode rod 212 through the second limiting body 26.

[0034] In this embodiment, a collecting mechanism 3 for collecting suspended matter in real time is provided at a position close to one side of the upper end of the main shell 1 , and a water outlet 4 is provided on the side of the main shell 1 , and an adapter 41 is connected in cooperation with the water outlet 4 .

[0035] The collecting mechanism 3 includes a movable containing shell 31, the upper end of which is an open structure. The movable containing shell 31 is arranged on the side of the main shell 1 by bolts. The upper end of the movable containing shell 31 is flush with the upper end of the main shell 1. The main shell 1 is provided with a second placement groove 32 on the side close to the movable containing shell 31. Two fifth limiting grooves 33 are symmetrically provided in the second placement groove 32. The two fifth limiting grooves 33 are respectively fixedly connected with third electric telescopic rods 34, and the telescopic ends of the two third electric telescopic rods 34 are fixedly connected with support plates 35.

[0036] The upper end of the support plate 35 is fixedly connected to two third fixed bodies 36 at a position close to the side, and the two third fixed bodies 36 are respectively provided with a sixth limiting groove 37, and the two sixth limiting grooves 37 are respectively fixedly connected to the third motors 38, and the transmission shaft ends of the two third motors 38 are respectively fixedly connected to the third threaded rods 39, and the sides of the two third threaded rods 39 are respectively provided with fourth limiting bodies 310 through threaded cooperation, and the two fourth limiting bodies 310 are respectively slidably cooperated with the sixth limiting grooves 37, and the inward sides of the two fourth limiting bodies 310 are fixedly connected to the second scraper 311, and the support plate 35 is a biofilm structure.

[0037] Specifically, the third electric telescopic rod 34 drives the support plate 35 to move upward. Since the support plate 35 is a biofilm structure, fine impurities wrapped in bubbles can be filtered out. Then the third motor 38 drives the third threaded rod 39 to rotate, and the third threaded rod 39 cooperates to drive the fourth limiting body 310 to move toward the movable containing shell 31. The fourth limiting body 310 drives the second scraper 311 to scrape the impurities into the movable containing shell 31 for collection.

[0038] When in use, the main body shell 1 is placed on a horizontal plane, and then the papermaking wastewater is poured into the empty slot 11. The positive electrode of the battery 25 is connected to the anode rod 212, so that the anode rod 212 can be provided with an anode, and the organic pollutants in the wastewater are oxidized into carbon dioxide and other impurities for discharge. At the same time, the two first motors 23 are started, and the two first motors 23 respectively drive the first threaded rod 22 to rotate, and the two first threaded rods 22 respectively drive the first limiting body 211 to move back and forth left and right, so that the anode rod 212 can penetrate the wastewater. At the same time, the second motor 225 drives the second threaded rod 27 to rotate, and the second threaded rod 27 cooperates to drive the second limiting body 26 to move along the second limiting groove 29. While moving, the third limiting body 218 at the upper end of the second limiting body 26 cooperates with the third limiting groove 217 to move The upper end of the first conductive plate 213 is connected to the second conductive plate 216 through a conductive spring 215, and the second conductive plate 216 is connected to the third limiter 218, which can ensure that during the movement of the second limiter 26, the battery 25 can always power the anode rod 212 through the second limiter 26, so that the anode rod 212 can be moved to any position in the empty slot 11, ensuring that the organic pollutants in the wastewater in the empty slot 11 can be completely removed, thereby improving the reliability of the device. At the same time, the cathode plate 24 is connected to the negative electrode of the battery 25 through an electric wire. During the wastewater treatment process, the cathode plate 24 with a filter structure can generate a large number of bubbles, which will wrap up the fine impurities in the wastewater during the floating process and make them rise to the liquid surface, making it convenient to salvage and clean them.

[0039] When the bubbles carry the impurities in the sewage and float on the liquid surface, the second electric telescopic rod 220 extends, and the second electric telescopic rod 220 drives the first scraper 223 to move downward. When the lower end of the first scraper 223 contacts the liquid surface, the pressure sensor 224 controls the second electric telescopic rod 220 to stop extending. When the first motor 23 drives the first fixed body 28 to move toward the collecting mechanism 3, the first scraper 223 moves the impurities on the liquid surface to the vicinity of the collecting mechanism 3. In the process of returning, the second electric telescopic rod 220 contracts to prevent the first scraper 2 23 stirs the wastewater, and then the third electric telescopic rod 34 drives the support plate 35 to move upward. Since the support plate 35 is a biofilm structure, the fine impurities wrapped in bubbles can be filtered out. Then the third motor 38 drives the third threaded rod 39 to rotate, and the third threaded rod 39 cooperates to drive the fourth limiting body 310 to move toward the movable containing shell 31. The fourth limiting body 310 drives the second scraper 311 to scrape the impurities into the movable containing shell 31 for collection. Floating impurities can be collected during the electrochemical treatment of wastewater, thereby improving the efficiency of the device in treating wastewater.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A waste paper papermaking wastewater treatment device, comprising a main body shell (1) of a rectangular parallelepiped structure, wherein an empty slot (11) is provided at the upper end of the main body shell (1), characterized in that: The upper end surface of the main body shell (1) is provided with a mobile electrolysis mechanism (2) for electrochemically treating wastewater in the main body shell (1), the mobile electrolysis mechanism (2) comprising two first limiting grooves (21) symmetrically arranged at the upper end of the main body shell (1), first limiting bodies (211) being slidably arranged in the two first limiting grooves (21), first electric telescopic rods (210) being fixedly connected to the upper ends of the two first limiting bodies (211), first fixed bodies (28) being fixedly connected to the telescopic ends of the two first electric telescopic rods (210), second limiting grooves (29) being arranged at the lower end of the first fixed body (28), second limiting bodies (26) being slidably arranged in the second limiting grooves (29), and the main body shell (1) ) is provided with a collecting mechanism (3) for collecting suspended matter in real time at a position close to one side of the upper end of the main body shell (1), a water outlet hole (4) is provided on the side of the main body shell (1), and a conversion joint (41) is connected in cooperation with the water outlet hole (4), and two first motors (23) are symmetrically provided on the side of the main body shell (1), and the transmission shaft ends of the two first motors (23) are respectively fixedly connected to first threaded rods (22) in first limiting grooves (21), and the two first threaded rods (22) are respectively arranged with first limiting bodies (211) by threaded cooperation, and a second motor (225) is fixedly connected to the side of the first fixing body (28), and the transmission shaft end of the second motor (225) is fixedly connected to a second threaded rod (22) in a second limiting groove (29). The second threaded rod (27) is arranged to be threadedly matched with the second limiting body (26); the lower end of the second limiting body (26) is fixedly connected to the anode rod (212); the first fixing body (28) is symmetrically provided with a third limiting groove (217) which is communicated with the second limiting groove (29); the first fixing body (28) is symmetrically provided with a first placement groove (214) which is communicated with the third limiting groove (217); the first fixing body (28) is fixedly connected with a first conductive plate (213) at a position above the first placement groove (214); the upper end of the first conductive plate (213) is fixedly connected with a conductive column (219); the upper end of the first fixing body (28) is fixedly connected with a conductive column (219) which is communicated with the conductive column (219); A battery (25) connected via an electric wire, wherein two of the first placement grooves (214) are respectively fixedly connected with a plurality of conductive springs (215) arranged at equal intervals, the lower ends of the plurality of conductive springs (215) are fixedly connected with two second conductive plates (216) slidably matched with the first placement grooves (214), the upper end of the second limiting body (26) is fixedly connected with two third limiting bodies (218) slidably matched with the third limiting grooves (217), the upper ends of the two third limiting bodies (218) are respectively in contact with the second conductive plates (216), the second limiting body (26) is made of conductive material, the first fixed body (28) and the second threaded rod (27) are made of insulating material, and a cathode plate (24) is fixedly connected to the main body shell (1).The cathode plate (24) is made of a conductive material, and the cathode plate (24) is connected to the battery (25) via an electric wire.

2. A waste paper making wastewater treatment device according to claim 1, characterized in that: A second fixing body (221) is fixedly connected to the side surfaces of the two first limiting bodies (211); a fourth limiting groove (222) is provided at the lower end of the second fixing body (221); a second electric telescopic rod (220) is fixedly connected to the upper end of the second fixing body (221); a pressure sensor (224) is fixedly connected to the telescopic end of the second electric telescopic rod (220); and a first scraper (223) slidably matched with the fourth limiting groove (222) is fixedly connected to the lower end of the pressure sensor (224).

3. The waste paper making wastewater treatment device according to claim 1, characterized in that: The collecting mechanism (3) comprises a movable containing shell (31), the upper end of which is an open structure, the movable containing shell (31) being arranged on the side of the main shell (1) by means of bolts, the upper end of which is flush with the upper end of the main shell (1), the main shell (1) being provided with a second placement groove (32) on the side close to the movable containing shell (31), the second placement groove (32) being symmetrically provided with two fifth limiting grooves (33), the two fifth limiting grooves (33) being respectively fixedly connected to third electric telescopic rods (34), and the telescopic ends of the two third electric telescopic rods (34) being fixedly connected to support plates (35).

4. A waste paper making wastewater treatment device according to claim 3, characterized in that: The upper end of the support plate (35) is fixedly connected to two third fixing bodies (36) at positions close to the side surfaces, the two third fixing bodies (36) are respectively provided with sixth limiting grooves (37), the two sixth limiting grooves (37) are respectively fixedly connected to third motors (38), the transmission shaft ends of the two third motors (38) are respectively fixedly connected to third threaded rods (39), the sides of the two third threaded rods (39) are respectively provided with fourth limiting bodies (310) through threaded cooperation, the two fourth limiting bodies (310) are respectively provided with sliding cooperation with the sixth limiting grooves (37), the inward sides of the two fourth limiting bodies (310) are fixedly connected to second scrapers (311), and the support plate (35) is a biofilm structure.

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