Sewage pretreatment ultra-filtration device

Abstract

The invention relates to the field of environmental protection equipment, in particular to a sewage pretreatment ultra-filtration device which comprises a box body and further comprises a filter assembly, the box body is hollow, the filter assembly is arranged in the box body and comprises two rollers arranged in parallel at intervals and an annular filter screen belt wound on the two rollers, and the filter screen belt is arranged in the box body. The roller rotates to drive the filter screen belt to move along the path of the filter screen belt, the filter screen belt divides the interior of the box body into two cavities, a mixing cavity is located above the filter screen belt, a liquid cavity is located below the filter screen belt, a water inlet is formed in the side wall of the box body and corresponds to the mixing cavity, and a water outlet is formed in the side wall of the box body. The side wall of the box body is provided with a water outlet corresponding to the liquid cavity, and the box body is provided with a slag discharge port corresponding to the position, far away from the water inlet, of the filter screen belt. The sewage treatment device has the effects of reducing filter screen blockage and improving the sewage filtering efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of environmental protection equipment, and in particular to an ultra-micro filtration device for sewage pre-treatment. Background Art

[0002] As people's awareness of environmental protection continues to increase, environmental protection equipment has gradually become popular in large and small manufacturers. Different production activities produce different wastewater.

[0003] Sewage treatment involves a large number of industries. In the food processing industry, or the animal husbandry industry or the slaughtering industry of some animals (poultry, fish, etc.), a large amount of sewage will be generated. The impurities in this type of sewage are mainly solid organic matter. For example, there are usually food residues in the sewage from the food processing industry. The sewage generated by the animal husbandry or slaughtering industry usually contains a large amount of blood, grease, food residues, feces, etc. In the process of treating this type of sewage, solid-liquid separation must be carried out, and the commonly used equipment for solid-liquid separation of sewage is a microfiltration machine.

[0004] The microfiltration machine, also known as a rotary drum screen, mainly includes a rotary drum and a frame. A cylindrical filter is arranged on the rotary drum, and the solid waste in the sewage is intercepted through the filter to achieve solid-liquid separation.

[0005] The filter screen of traditional microfiltration machines is easily clogged during use, with a high failure rate, which is not conducive to improving sewage treatment efficiency. Summary of the invention

[0006] In order to reduce the clogging of the filter during sewage treatment, reduce the equipment failure rate and improve the sewage treatment efficiency, the present application provides a sewage pre-treatment ultra-micro filtration device.

[0007] The present application provides a sewage pre-treatment ultra-microfiltration device that adopts the following technical solution: A sewage pre-treatment ultra-microfiltration device comprises a housing and a filter assembly, wherein the housing is hollow and the filter assembly is arranged inside the housing, the filter assembly comprises two rollers arranged in parallel and spaced apart and an annular filter belt wound around the two rollers, the rollers can drive the filter belt to move along its own path when rotating, the filter belt divides the interior of the housing into two cavities, the mixing cavity is located above the filter belt, and the liquid cavity is located below the filter belt, a water inlet is provided on the side wall of the housing corresponding to the mixing cavity, a water outlet is provided on the side wall of the housing corresponding to the liquid cavity, and a slag discharge port is provided on the housing corresponding to the filter belt away from the water inlet.

[0008] By adopting the above technical solution, during the sewage treatment process, the roller drives the filter belt to move along a circular path. Sewage enters the mixing chamber from the water inlet and then impacts the filter belt, which intercepts solid impurities. As the roller rotates, the impurities move toward the slag discharge port. As the filter belt moves, the impurities fall from the filter belt at one end of the filter belt near the slag discharge port and enter the slag discharge port to be discharged outside the box. This reduces the occurrence of filter belt blockage caused by impurity accumulation.

[0009] Optionally, the two rollers are spaced apart in both the horizontal and vertical directions, and the height of the roller away from the water inlet is greater than the height of the roller close to the water inlet.

[0010] By adopting the above technical solution, the two rollers are spaced apart in the vertical direction, so that there is a height difference between the two ends of the filter belt. The water inlet enters the sewage outlet and falls on the filter belt. The height difference can prevent the sewage from moving toward the slag outlet, thereby improving the filtering effect.

[0011] Optionally, a water distribution assembly is provided at the water inlet, and the water distribution assembly includes a receiving plate and a side plate. The receiving plate is located between the water inlet and the filter mesh belt, one side of the receiving plate is fixed on the side wall of the box body where the water inlet is set, and the other side extends to above the filter mesh belt. The side plates are arranged on both sides of the water inlet in a horizontal direction and are fitted and connected to the side wall of the box body where the water inlet is set.

[0012] By adopting the above technical solution, the flow direction of sewage is guided by the receiving plate and the side plate, so that the sewage can flow stably to the filter belt and filter the sewage comprehensively.

[0013] Optionally, the water distribution assembly further includes a first interception plate and a second interception plate, and the first interception plate and the second interception plate are arranged in parallel and spaced apart, and are both perpendicular to the penetration direction of the water inlet.

[0014] By adopting the above technical solution, the second interception plate is located at a position where the first interception plate is far away from the water inlet, and the side of the second interception plate close to the ground is located below the side of the first interception plate close to the ground. After the sewage enters the box from the water inlet, it hits the first interception plate and the second interception plate in turn. The first interception plate first intercepts the sewage, and the sewage passes under the first interception plate. Then, it passes through the second interception plate, and the second interception plate intercepts the sewage again, thereby improving the uniformity of the flow rate of the sewage when it falls on the filter belt. Moreover, after the sewage hits the first interception plate or the second interception plate, it spreads to the surroundings, thereby expanding the contact area between the sewage and the filter belt and improving the filtering effect.

[0015] Optionally, an upper cover plate is provided above the first intercepting plate, the upper cover plate is located above the first intercepting plate, and one side of the upper cover plate is fitted and fixedly connected to the side wall of the box body where the water inlet is provided, and the other side is connected to the first intercepting plate.

[0016] By adopting the above technical solution, a switch door is usually set on the side of the box body away from the ground to facilitate equipment maintenance. After the sewage impacts the upper cover plate, it spreads to the surroundings, and the upper cover plate prevents the sewage from spreading upward and splashing out of the box body.

[0017] Optionally, the end of the filter belt close to the water inlet is defined as the filtering end, and the end away from the water inlet is defined as the slag discharge end. A slag scraping assembly is provided below the slag discharge end. The slag scraping assembly includes a scraper connected to the box body and abutting against the filter belt.

[0018] By adopting the above technical solution, during the sewage treatment process, the filter belt moves, and the scraper moves relative to the filter belt to scrape off impurities adhering to the filter belt, further reducing the occurrence of filter mesh pore blockage.

[0019] Optionally, a clearing component is also provided under the filter component, and the clearing component includes an adsorption component and an exhaust component. The adsorption component is hollow inside, and adsorption holes are provided on the side of the adsorption component close to the filter mesh belt. The exhaust component is connected to the inside of the adsorption component to extract the air inside the adsorption component.

[0020] By adopting the above technical solution, the air inside the adsorption member is extracted through the suction member, thereby generating negative pressure inside the adsorption member, and impurities in the mesh of the filter belt are absorbed through the adsorption holes to achieve dredging of the mesh.

[0021] Optionally, the suction member includes a suction member, which is hollow inside and has an opening on one side close to the filter assembly. The suction member is arranged below the filter end and can receive filtered sewage. A drain outlet is arranged on the suction member, and a suction pipe is arranged between the drain outlet and the adsorption member. One end of the suction pipe is connected to the adsorption member and communicated with the inside of the adsorption member, and the other end extends to one side of a trajectory line in the direction of penetration of the drain outlet.

[0022] By adopting the above technical solution, the sewage enters the suction element after being filtered, and then is collected and discharged at the drain outlet. A water column is formed in the process of sewage being discharged from the drain outlet, and the suction pipe extends to one side of the water column. According to the Bernoulli principle, the pressure is small at the location with high flow rate, so that the air in the adsorption element can be extracted, so that negative pressure is formed in the adsorption element.

[0023] Optionally, the exhaust pipe is connected to the side wall of the adsorbent close to the ground, and a dirt blocking plate is provided inside the adsorbent. The dirt blocking plate is installed on the inner wall of the adsorbent and corresponds to the position of the end of the exhaust pipe.

[0024] By adopting the above technical solution, when the adsorbent is extracting impurities, the impurities enter the adsorbent, and the impurities are blocked from entering the exhaust pipe by the dirt blocking plate, thereby reducing the occurrence of exhaust pipe blockage.

[0025] Optionally, an exhaust hole is formed on the adsorbent at a position corresponding to the exhaust pipe, and the side surface coinciding with the center line of the exhaust hole is defined as a median plane. Two pollution-blocking plates are symmetrically arranged about the median plane, and the sides of the two pollution-blocking plates close to the ground extend in directions away from each other and are spaced apart from the side walls of the adsorbent.

[0026] By adopting the above technical solution, the two dirt blocking plates guide the impurities to the two sides of the air extraction port respectively, which can temporarily store more impurities in the adsorbent and reduce the frequency of cleaning the adsorbent. On the other hand, it can also reduce the situation where the impurities accumulate too much on one side and flow into the air extraction pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the overall internal structure of the first embodiment of the present application.

[0029] Figure 3 It is a schematic structural diagram of the water distribution assembly of the first embodiment of the present application.

[0030] Figure 4 It is a schematic structural diagram of the scraper assembly of the first embodiment of the present application.

[0031] Figure 5 It is a schematic structural diagram of the tensioning assembly of the first embodiment of the present application.

[0032] Figure 6 It is a schematic diagram of the structure of the dredging component of the second embodiment of the present application.

[0033] Figure 7 It is a schematic structural diagram of a connecting piece according to the second embodiment of the present application.

[0034] Figure 8 It is a schematic diagram of the overall structure of the adsorption component of the second embodiment of the present application.

[0035] Figure numerals: 1, filter assembly; 11, roller; 12, filter mesh belt; 2, scraper assembly; 21, rotating roller; 22, scraper; 3, box; 31, water inlet; 32, water outlet; 33, mixing chamber; 34, liquid chamber; 35, slag outlet; 4, dredging assembly; 41, flushing pipe; 42, nozzle; 43, suction piece; 44, adsorption piece; 441, accommodating part; 442, suction nozzle; 443, dirt blocking plate; 444, dirt box; 445, guide plate; 45, connecting piece; 451, connecting part; 4 52. Acceleration part; 453. Transition part; 454. Protective cover; 46. Exhaust pipe; 5. Water distribution assembly; 51. First interception plate; 52. Second interception plate; 53. Upper cover plate; 54. Side plate; 55. Receiving plate; 56. Water blocking plate; 6. Adjustment assembly; 61. Sliding part; 62. Adjustment rod; 63. Limiting part; 64. Baffle; 7. Linkage assembly; 71. Sprocket; 72. Chain; 8. Tensioning assembly; 81. Rotating sleeve; 82. Extension rod; 83. Tensioning wheel; 84. Torque rod; 9. Counterweight. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-8 This application is described in further detail.

[0037] Reference Figure 1 and Figure 2 A sewage pre-treatment ultra-microfiltration device comprises a housing 3 and a filter assembly 1 and a scraper assembly 2 arranged inside the housing 3. A water inlet 31 and a water outlet 32 ​​are arranged on the housing 3, and the water inlet 31 and the water outlet 32 ​​are arranged at intervals in the vertical direction, and the water inlet 31 is located above the water outlet 32. The filter assembly 1 is located between the water inlet 31 and the water outlet 32, the water inlet 31 is connected to the sewage source, and the water outlet 32 ​​is connected to the subsequent process equipment. The sewage is discharged from the water inlet 31 to the filter assembly 1, and the filter assembly 1 is used to intercept solid impurities in the sewage to achieve solid-liquid separation. The scraper assembly 2 is used to scrape off impurities on the filter assembly 1.

[0038] Reference Figure 1 and Figure 2 An opening can be provided on the side of the box body 3 facing away from the ground, and a switch door can be rotatably provided to facilitate the staff to repair the filter component 1 or the scraper component 2.

[0039] Reference Figure 1 and Figure 2The filter assembly 1 includes a roller 11 and a filter mesh belt 12, and the roller 11 is provided in two. The two rollers 11 are arranged in parallel and spaced apart, and are rotatably connected to the inner wall of the box body 3. The rotation axis of the roller 11 is perpendicular to the penetration direction of the water inlet 31 and the water outlet 32. The roller 11 close to the water inlet 31 is defined as the first roller, and the roller 11 away from the water inlet 31 is defined as the second roller. The height of the second roller in the vertical direction is greater than the height of the first roller in the vertical direction. The filter mesh belt 12 is an annular structure and is made of a flexible material. The filter mesh belt 12 is sleeved on the two rollers 11. Under the action of the filter mesh belt 12, the interior of the box body 3 is divided into two cavities arranged in the vertical direction. Among them, the mixing chamber 33 is located above the filter mesh belt 12, and the liquid chamber 34 is located below the filter mesh belt 12. The water inlet 31 corresponds to the mixing chamber 33, and the water outlet 32 ​​corresponds to the liquid chamber 34. The rotation of the roller 11 can drive the filter belt 12 to move in its own circumferential direction. A slag discharge port 35 is provided on the side wall of the box body 3 close to the ground at a position corresponding to the second roller. After the sewage enters the box body 3, it falls on the filter belt 12, and the filter belt 12 intercepts the solid impurities. Subsequently, under the action of the roller 11, the filter belt 12 moves and drives the impurities close to the slag discharge port 35, and the residue on the filter belt 12 is discharged to reduce the occurrence of filter blockage.

[0040] Reference Figure 1 and Figure 2 After the filter belt 12 is wound on the two rollers 11, two mutually parallel plane parts and arc parts corresponding to the two rollers 11 are formed, and the plane parts and the arc parts are connected to form a ring structure. The plane part located at the top is defined as the upper plane part. During the sewage filtration process, the sewage impacts on the upper plane part. In order to reduce the deformation of the upper plane part, a support member 13 is arranged under the upper plane part, and the upper plane part is supported by the support member 13 to reduce the deformation of the upper plane part.

[0041] Reference Figure 2 and Figure 3 A water distribution assembly 5 is also provided at a position corresponding to the water inlet 31 in the box body 3. The water distribution assembly 5 includes a first interception plate 51 and a second interception plate 52. The first interception plate 51 and the second interception plate 52 are arranged in parallel and spaced apart along the penetrating direction of the water inlet 31, wherein the second interception plate 52 is located on the side of the first interception plate 51 away from the water inlet 31. The side of the second interception plate 52 close to the ground is located below the side of the first interception plate 51 close to the ground. When the amount of sewage is large, it first impacts the first interception plate 51, which intercepts the sewage and diffuses it to the surroundings. Then it passes under the first interception plate 51, and then impacts the second interception plate 52, which is intercepted again by the second interception plate 52 and diffuses again. In this way, the sewage can evenly impact the filter mesh belt 12, and the filter mesh belt 12 is effectively utilized.

[0042] Reference Figure 2 and Figure 3 The water distribution assembly 5 further includes an upper cover plate 53, which is located between the first intercepting plate 51 and the side wall where the water inlet 31 is located. One side of the upper cover plate 53 is vertically integrally formed and arranged on the side of the first intercepting plate 51 facing away from the ground, and the other end is welded to the inner wall of the box body 3. The upper cover plate 53 prevents the sewage from splashing upward after hitting the first intercepting plate 51.

[0043] Reference Figure 2 and Figure 3 The water distribution assembly 5 also includes two side plates 54, which are arranged on both sides of the first intercepting plate 51 and the second intercepting plate 52 along the length direction of the roller 11, and the two parallel side walls of the first intercepting plate 51 and the second intercepting plate 52 are respectively welded to the two side plates 54.

[0044] Reference Figure 2 and Figure 3 The water distribution assembly 5 further includes a guide plate 55, which is located below the water inlet 31 and above the first roller. One side of the guide plate 55 is welded to the inner wall of the box body 3, and the other side extends toward the first roller to prevent sewage from passing through the gap between the first roller and the side wall of the box body 3 and moving directly downward to the water outlet 32, thereby improving the filtering effect.

[0045] Reference Figure 2 and Figure 3 A water blocking plate 56 is arranged between the upper plane portion and the side wall of the box body 3. One side of the water blocking plate 56 is welded to the inner wall of the box body 3, and the other side extends to the bottom of the upper plane portion, which has the effect of supporting the upper plane portion and can reduce the situation where sewage moves directly downward without passing through the filter belt 12.

[0046] Reference Figure 2 and Figure 4 The scraper assembly 2 includes a scraper 22, which is arranged below the filter mesh belt 12 and abuts against the filter mesh belt 12 on one side. Under the action of the scraper 22, when the filter mesh belt 12 moves, the scraper 22 can scrape off the impurities adhered to the filter mesh belt 12, thereby further reducing the blockage of the filter mesh belt 12.

[0047] Reference Figure 2 and Figure 4 The scraper assembly 2 further includes a rotating roller 21, which is rotatably arranged on the housing 3 and parallel to the roller 11. The scraper 22 is welded to the rotating roller 21. Rotating the rotating roller 21 can drive the scraper 22 to move, so that the scraper 22 actively scrapes the impurities on the filter mesh belt 12, thereby improving the scraping effect of the impurities. A plurality of scrapers 22 can be evenly spaced around the rotating axis of the rotating roller 21 to further improve the scraping effect of the impurities on the filter mesh belt 12.

[0048] Reference Figure 2 and Figure 4 An adjustment assembly 6 is provided between the two ends of the second roller and the box body 3, and the adjustment assembly 6 includes a sliding member 61, and the sliding member 61 is a plate-like structure. The plane coinciding with the rotation axis of the two rollers 11 is the extension plane, and the direction parallel to the extension plane and perpendicular to the axis of the roller 11 is the adjustment direction. The sliding member 61 is slidably connected to the box body 3 along the adjustment direction, and the end of the second roller is rotatably connected to the sliding member 61. The sliding sliding member 61 can make the second roller approach or move away from the first roller. By adjusting the distance between the second roller and the first roller, the tension of the filter belt 12 can be adjusted to enable it to better play a filtering role.

[0049] Reference Figure 2 and Figure 4 The adjustment assembly 6 also includes an adjustment rod 62, a limiter 63 and a baffle 64. The baffle 64 is arranged at a position where the sliding member 61 is away from the first roller. The adjustment rod 62 is arranged parallel to the sliding direction of the sliding member 61, and one end is rotatably connected to the sliding member 61. The end of the adjustment rod 62 away from the sliding member 61 passes through the baffle 64 and extends to the side of the baffle 64 away from the sliding member 61. The limiter 63 is arranged at one end of the baffle 64 away from the sliding member 61, and is threadedly connected to the adjustment rod 62. The limiter 63 abuts against the side of the baffle 64 away from the sliding member 61. Rotating the limiter 63 can make the limiter 63 move along the length direction of the adjustment rod 62, thereby realizing the adjustment of the position of the sliding member 61.

[0050] Reference Figure 2 and Figure 4 A linkage assembly 7 is provided between the roller 11 and the rotating roller 21. The linkage assembly 7 includes a sprocket 71 and a chain 72. Two sprockets 71 are provided. The two sprockets 71 are coaxially fixedly connected to the rotating roller 21 and the roller 11, respectively. The chain 72 is sleeved outside the two sprockets 71. The rotation of one sprocket 71 can drive the other sprocket 71 to rotate synchronously, thereby realizing the synchronous rotation of the rotating roller 21 and the roller 11. At the same time, since the rotating roller 21 is located below the filter mesh belt 12, the part of the filter mesh belt 12 close to the ground has a tendency to move toward the direction close to the water outlet 32, and the scraper 22 located above the rotating roller 21 has a tendency to move away from the water outlet 32. The relative movement of the two realizes the removal of impurities.

[0051] Reference Figure 2 and Figure 4A tensioning assembly 8 is provided on the housing 3, and the tensioning assembly 8 includes a rotating sleeve 81, an extension rod 82 and a tensioning wheel 83. A rotating shaft is provided between the rotating roller 21 and the sprocket 71, and the rotating shaft is rotatably connected to the housing 3. The sprocket 71 is coaxially fixed on the rotating shaft. The rotating sleeve 81 is sleeved on the outside of the rotating shaft and is rotatably connected to the housing 3. The extension rod 82 is provided perpendicular to the rotating sleeve 81, and one end is welded to the rotating sleeve 81. The tensioning wheel 83 is located between the two sprockets 71, and is rotatably connected to one end of the extension rod 82 away from the rotating sleeve 81. The tensioning wheel 83 is meshed with the inside of the chain 72, and rotating the rotating sleeve 81 can drive the tensioning wheel 83 to rotate around the axis of the rotating sleeve 81, thereby tensioning the chain 72 and improving the stability of the sprocket 71 and the chain 72 during the meshing process.

[0052] Reference Figure 2 and Figure 5 The tensioning assembly 8 also includes a torque rod 84 and a counterweight 9. The torque rod 84 is arranged on one side of the rotating sleeve 81 in the horizontal direction. One end of the torque rod 84 is welded to the rotating sleeve 81 in the direction perpendicular to the rotation axis of the rotating sleeve 81. The counterweight 9 is installed on the torque rod 84. Under the action of the gravity of the counterweight 9, the rotating sleeve 81 can maintain the tendency to rotate, so that the chain 72 is stably in a tensioned state, and the position of the tensioning wheel 83 can be adjusted automatically according to the relative movement between the roller 11 and the rotating roller 21. A through hole is opened on the counterweight 9, and the torque rod 84 is inserted in the through hole to realize the connection between the counterweight 9 and the torque rod 84. The counterweight 9 can slide along the length direction of the torque rod 84, thereby changing the torque between the counterweight 9 and the rotating sleeve 81, and realizing the adjustment of the force applied by the tensioning wheel 83 to the chain 72. The counterweight block 9 is provided with a locking screw, which is threadedly connected to the counterweight block 9. Rotating the locking screw can make the locking screw press against the torque rod 84, so as to lock and fix the counterweight block 9 after the position of the counterweight block 9 is adjusted.

[0053] Reference Figure 2 In order to further reduce the occurrence of clogging of the filter mesh belt 12, a dredging component 4 is arranged between the first roller and the second roller, and the dredging component 4 is used to clean the impurities between the meshes of the filter mesh belt 12. The dredging component 4 includes a flushing pipe 41 and a nozzle 42. The flushing pipe 41 is arranged between the first roller and the second roller in parallel with the first roller and the second roller, and is located inside the circular trajectory of the filter mesh belt 12. The nozzle 42 is installed on the flushing pipe 41, and a plurality of nozzles 42 are arranged at intervals along the length direction of the flushing pipe 41. The flushing pipe 41 is connected to an external water heater, and hot water is injected into the flushing pipe 41 through the pump body cavity, and then sprayed out by the nozzle 42. Under the action of the nozzle 42, the water flow impacts the filter mesh belt 12, thereby clearing and cleaning the meshes of the filter mesh belt 12.

[0054] The implementation principle of the ultra-fine filtration device for pre-treatment of sewage in the embodiment of the present application is as follows: during the sewage treatment process, the roller 11 rotates continuously, filtering the sewage while driving solid impurities to move to the slag discharge port 35, and discharged from the slag discharge port 35, thereby reducing the occurrence of blockage of the filter belt 12.

[0055] Example 2 Reference Figure 2 and Figure 6 , the difference between this embodiment and embodiment 1 is that the structure of the dredging component 4 is different. In this embodiment, the dredging component 4 includes an exhaust member 43 and an adsorption member 44. The exhaust member 43 is a square disc-shaped structure as a whole. It is parallel to the extension surface and is arranged below the filter mesh belt 12. The exhaust member 43 is hollow inside, and an opening is arranged on the side close to the filter mesh belt 12. The exhaust member 43 is located near the water inlet 31. After the sewage enters the box body 3, it passes through the filter mesh belt 12 and flows into the exhaust member 43. A drain port is arranged on the side of the exhaust member 43 close to the ground. Under the action of gravity, the liquid in the exhaust member 43 can be discharged from the drain port. The adsorption member 44 is located on the side of the exhaust member 43 away from the water outlet 32. The adsorption member 44 is hollow inside, and an adsorption hole is arranged on the side of the adsorption member 44 close to the mesh belt 12, and the adsorption hole is connected to the interior of itself. The adsorption member 44 is also provided with an exhaust pipe 46 , one end of which is connected to the interior of the adsorption member 44 , and the other end of which extends to one side of a trajectory line of the drainage port of the exhaust member 43 in the penetrating direction.

[0056] During the sewage treatment process, the sewage enters the housing 3 from the water inlet 31 at a uniform speed, and then enters the suction member 43. The water inflow and water outflow in the suction member 43 reach a dynamic balance, so that the liquid level is maintained at a certain height. In other embodiments, when there is a lot of sewage, it may overflow from the suction member 43 to keep the liquid level at a specific height. In this embodiment, the liquid level in the suction member 43 is controlled by controlling the amount of sewage inflow. The water in the suction member 43 is discharged vertically downward from the drain port to form a flowing water column. According to the Bernoulli principle in fluid mechanics, the pressure around the water column is less than the pressure at other positions, so that the air inside the adsorption member 44 has a tendency to move in the direction close to the water column. Under the action of atmospheric pressure, negative pressure is generated at the adsorption hole of the adsorption member 44, so that impurities in the mesh of the filter mesh belt 12 can be adsorbed to achieve the dredging of the mesh of the filter mesh belt 12. No power source is required in this process, which has the effect of energy saving and environmental protection.

[0057] Reference Figure 6 and Figure 7, a connecting piece 45 is provided at the drain outlet, and the connecting piece 45 includes a connecting part 451, an accelerating part 452 and a transition part 453. The connecting part 451 and the accelerating part 452 are both tubular structures, and the cross-sectional area of ​​the connecting part 451 is larger than the cross-sectional area of ​​the accelerating part 452. The connecting part 451 is connected to the air extraction piece 43 and communicated with the drain hole. The side wall of the drain outlet is flush with the inner wall of the connecting part 451. The transition part 453 is arranged between the connecting part 451 and the accelerating part 452, and the transition part 453 is conical as a whole, and the interior is hollow and has openings at both ends. The two ends of the transition part 453 are respectively communicated with the connecting part 451 and the accelerating part 452, so as to realize the communication between the accelerating part 452 and the connecting part 451. The water in the air extraction piece 43 flows into the accelerating part 452 through the connecting part 451. After the fluid enters the pipe with a smaller cross-section, the flow is accelerated, which further reduces the pressure near the water column, improves the adsorption force of the adsorption hole of the adsorption piece 44, and improves the dredging effect on the filter mesh belt 12.

[0058] Reference Figure 6 and Figure 7 In this embodiment, the connecting portion 451 and the accelerating portion 452 are both annular structures. Define the inner wall diameter of the connecting portion 451 as d1 and the inner wall diameter of the accelerating portion as d2, then 1.3≤d1 / d2. To ensure the effect of accelerating the water flow. At the same time, control 10mm≤d2≤30mm to ensure the drainage efficiency of the exhaust member 43. The length L of the transition portion 453 is determined by the following empirical formula, L=(d1 / d2)*i, (2≤i≤5). By controlling the length of the transition portion 453, the resistance encountered by the water flow in the process of moving from the connecting portion 451 to the accelerating portion 452 is adjusted, thereby reducing the loss of kinetic energy during the flow of the liquid.

[0059] Reference Figure 6 and Figure 7 A shield 454 is provided below the acceleration part 452. The shield 454 corresponds to the shape of the acceleration part 452, and the cross-sectional area is larger than that of the acceleration part 452. Both ends of the shield 454 are open, and the end facing away from the ground is connected to the lower end of the acceleration part 452. When the water column passes through the shield 454, there is a gap between the water column and the shield 454. The end of the exhaust pipe 46 away from the adsorbent 44 is connected to the shield 454 and is connected to the inside of the shield 454. After the water flows through the shield 454, a negative pressure is formed inside the shield 454, which is convenient for extracting the air in the adsorbent 44. And it drives the air out of the shield 454, reducing the occurrence of gas affecting the flow of liquid. Moreover, the shield 454 blocks the air in other positions of the water column except the exhaust pipe 46 from flowing in the direction close to the water column, thereby improving the adsorption force of the adsorbent 44.

[0060] Reference Figure 6 and Figure 8The adsorption member 44 includes a housing portion 441 and a suction nozzle 442. The housing portion 441 is a rectangular block structure as a whole, and is arranged parallel to the roller 11. The suction nozzle 442 is a cylindrical structure, one end of which is welded to the side of the housing portion 441 facing away from the ground, and is connected to the inside of the housing portion 441. An adsorption hole with a rectangular cross section is formed inside the suction nozzle 442. The length direction of the adsorption hole cross section is equal to the width direction of the filter mesh belt 12, so that the adsorption member 44 can fully dredge through the mesh on the filter mesh belt 12. The width of the adsorption hole cross section ranges from 2mm to 6mm. The size of the adsorption hole is controlled to ensure the adsorption force at the adsorption hole, thereby improving the dredging effect on the mesh of the filter mesh belt 12.

[0061] Reference Figure 6 and Figure 8 A plurality of connecting members 45 and adsorbing members 44 are arranged at intervals along the direction of the rotation axis of the roller 11 , which can improve the drainage efficiency of the suction member 43 on the one hand, and improve the adsorption force of the adsorbing member 44 on the other hand.

[0062] Reference Figure 6 and Figure 8 , one end of the exhaust pipe 46 close to the adsorption member 44 is connected to the side of the accommodating portion 441 close to the ground. An exhaust hole is formed in the accommodating portion 441 corresponding to the position of the exhaust pipe 46. A dirt blocking plate 443 is arranged in the accommodating portion 441, and two dirt blocking plates 443 are arranged. The plane that coincides with the center line of the exhaust hole and is parallel to the roller 11 is defined as the mid-plane. The two dirt blocking plates 443 are symmetrically arranged about the mid-plane. The two dirt blocking plates 443 are inclined in a direction away from each other on the side away from the filter mesh belt 12, and are spaced apart from the side wall of the accommodating portion 441. During the adsorption process of the mesh of the filter mesh belt 12, impurities in the mesh enter the accommodating portion 441, and are then intercepted by the dirt blocking plates 443, preventing the impurities from entering the exhaust pipe 46.

[0063] Reference Figure 6 and Figure 8 Two dirt boxes 444 are arranged on both sides of the accommodating portion 441 parallel to the middle plane. The two dirt boxes 444 are detachably connected to the accommodating portion 441 by screws, and the interior of the dirt box 444 is connected to the accommodating portion 441. The dirt blocking plate 443 is arranged obliquely to guide the impurities to approach the dirt box 444 and temporarily store them in the dirt box 444. When there are a lot of impurities, the dirt box 444 can be disassembled and cleaned.

[0064] Reference Figure 6 and Figure 8A guide plate 445 is provided on the side of the dirt blocking plate 443 below that is away from the adsorption hole, and two guide plates 445 are also symmetrically arranged about the median plane. The side of the guide plate 445 close to the ground is connected to the inner wall of the dirt box 444 close to the ground. The two guide plates 445 are inclined in a direction of approaching each other on the sides away from the ground, and a gap is set. The end of the guide plate 445 that is away from the ground is defined as the confluence end, and the end of the dirt blocking plate 443 that is close to the ground is defined as the separation end. The confluence end of the two guide plates 445 is located between the separation ends of the two dirt blocking plates 443. The guide plate 445 is enabled to receive the impurities flowing down from the dirt blocking plate 443 and guide the impurities into the dirt box 444.

[0065] The implementation principle of the ultra-fine filtration device for sewage pre-treatment in the embodiment of the present application is as follows: the adsorption member 44 extends to the drain outlet of the exhaust member 43 through the exhaust pipe 46, and the Bernoulli principle is used to generate negative pressure at the adsorption holes on the adsorption member 44 to adsorb impurities in the mesh of the filter belt 12, thereby clearing the filter mesh and achieving unpowered cleaning of the mesh, thereby achieving energy-saving effects.

[0066] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sewage pre-treatment ultra-microfiltration device, comprising a housing (3), characterized in that: The invention also comprises a filter assembly (1), wherein the interior of the housing (3) is hollow, and the filter assembly (1) is arranged inside the housing (3). The filter assembly (1) comprises two rollers (11) arranged in parallel and spaced apart, and an annular filter belt (12) wound around the two rollers (11). The rotation of the rollers (11) can drive the filter belt (12) to move along its own path. The filter belt (12) divides the interior of the housing (3) into two cavities, wherein the mixing cavity (33) is located above the filter belt (12), and the liquid cavity (34) is located below the filter belt (12). A water inlet (31) is provided on the side wall of the housing (3) corresponding to the mixing cavity (33), and a water outlet (32) is provided on the side wall of the housing (3) corresponding to the liquid cavity (34). A slag discharge port (35) is provided on the housing (3) at a position corresponding to the filter belt (12) away from the water inlet (31).

2. The ultra-microfiltration device for sewage pre-treatment according to claim 1, characterized in that: The two rollers (11) are arranged at intervals in both the horizontal and vertical directions, and the height of the roller (11) away from the water inlet (31) is greater than the height of the roller (11) close to the water inlet (31).

3. The sewage pre-treatment ultra-microfiltration device according to claim 1, characterized in that: A water distribution assembly (5) is provided at the water inlet (31), and the water distribution assembly (5) comprises a receiving plate (55) and a side plate (54). The receiving plate (55) is located between the water inlet (31) and the filter mesh belt (12), one side of which is fixed to the side wall of the box body (3) where the water inlet (31) is provided, and the other side of which extends to above the filter mesh belt (12). The side plates (54) are provided at both sides of the water inlet (31) in a horizontal direction, and are closely connected to the side wall of the box body (3) where the water inlet (31) is provided.

4. The sewage pre-treatment ultra-microfiltration device according to claim 3, characterized in that: The water distribution assembly (5) further comprises a first interception plate (51) and a second interception plate (52), wherein the first interception plate (51) and the second interception plate (52) are arranged in parallel and at intervals, and are both perpendicular to the penetration direction of the water inlet (31).

5. The sewage pre-treatment ultra-microfiltration device according to claim 4, characterized in that: An upper cover plate (53) is provided above the first intercepting plate (51); the upper cover plate (53) is located above the first intercepting plate (51); one side of the upper cover plate (53) is fitted and fixedly connected to a side wall of the box body (3) where the water inlet (31) is provided, and the other side is connected to the first intercepting plate (51).

6. The sewage pre-treatment ultra-microfiltration device according to claim 1, characterized in that: The end of the filter mesh belt (12) close to the water inlet (31) is defined as the filtering end, and the end away from the water inlet (31) is defined as the slag discharge end. A slag scraping assembly (2) is provided below the slag discharge end. The slag scraping assembly (2) comprises a scraper (22). The scraper (22) is connected to the box body (3) and abuts against the filter mesh belt (12).

7. The sewage pre-treatment ultra-microfiltration device according to claim 6, characterized in that: A dredging component (4) is also provided below the filter component (1), the dredging component (4) comprising an adsorption component (44) and an exhaust component (43), the adsorption component (44) being hollow inside, adsorption holes being provided on the side of the adsorption component (44) close to the filter mesh belt (12), the exhaust component (43) being connected to the inside of the adsorption component (44) for exhausting air inside the adsorption component (44).

8. The ultra-microfiltration device for sewage pre-treatment according to claim 7, characterized in that: The suction member (43) comprises a suction member (43), the interior of the suction member (43) is hollow, and an opening is arranged on a side close to the filter assembly (1), the suction member (43) is arranged below the filter end, and can receive filtered sewage, the suction member (43) is provided with a drain outlet, and an suction pipe (46) is arranged between the drain outlet and the adsorption member (44), one end of the suction pipe (46) is connected to the adsorption member (44) and communicates with the interior of the adsorption member (44), and the other end extends to one side of a trajectory line in a direction through which the drain outlet penetrates.

9. The sewage pre-treatment ultra-microfiltration device according to claim 8, characterized in that: The air extraction pipe (46) is connected to a side wall of the adsorption member (44) close to the ground, and a dirt blocking plate (443) is provided inside the adsorption member (44). The dirt blocking plate (443) is installed on the inner side wall of the adsorption member (44) and corresponds to the position of the end of the air extraction pipe (46).

10. The sewage pre-treatment ultra-microfiltration device according to claim 9, characterized in that: An air extraction hole is formed on the adsorption member (44) at a position corresponding to the air extraction pipe (46), and a side surface that coincides with the center line of the air extraction hole is defined as a mid-plane. Two dirt-blocking plates (443) are symmetrically arranged with respect to the mid-plane, and the sides of the two dirt-blocking plates (443) close to the ground extend in directions away from each other and are spaced apart from the side wall of the adsorption member (44).

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