A dry-wet separation flat filter
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAHAI SMART FISHERIES (ZHUHAI) CO LTD
- Filing Date
- 2025-09-12
- Publication Date
- 2026-08-07
AI Technical Summary
[0002]微滤机作为一种截留细小悬浮物的筛网过滤器，可用于自来水厂原水过滤以及除去藻类、水蚤等浮游生物，也可用于循环水水产养殖、工业用水的过滤处理、工业废水中有用物质的回收及污水的终处理等，现有的微滤机在使用的过程中，当转鼓内杂质过多时，部分杂质会附在转鼓筛网的内壁上，造成筛网阻塞，从而导致微滤机内的水位会持续增高
本实用新型通过倾斜设置的过滤网，并利用可往返移动的刮片机构，能够将过滤出来的杂质进行固液分离，分离出来的固态杂质通过刮片机构刮落并收集利用，另外通过设置反冲洗机构，利用过滤出来的水体对过滤网进行冲洗，能够保证过滤网的使用效果，同时减少清洗水体的使用，较传统的过滤网冲洗机构减少水体的流失98%，基本上实现零排放，能有效降低使用成本。
Smart Images
Figure CN224598837U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of microfiltration technology, specifically to a dry-wet separation flat filter. Background Technology
[0002] Microfilters, as a type of screen filter that traps fine suspended solids, can be used for raw water filtration in water treatment plants and for removing algae, water fleas, and other planktonic organisms. They can also be used for circulating water aquaculture, industrial water filtration, recovery of useful substances from industrial wastewater, and final treatment of sewage. However, in the operation of existing microfilters, when there are too many impurities inside the drum, some of these impurities will adhere to the inner wall of the drum screen, causing screen blockage and resulting in a continuous increase in the water level inside the microfilter.
[0003] Most existing microfiltration machines rely directly on backwashing devices for cleaning. The backwashing device uses a high-pressure water gun to wash away impurities from the rotating drum screen. Since the washed-off impurities are mixed with water, they cannot be used directly. At the same time, treating these impurities will cause a certain amount of water waste and increase the cost of subsequent wastewater treatment facilities and equipment, thus increasing the operating cost. Summary of the Invention
[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a dry-wet separation flat filter that can achieve dry-wet separation of filtered impurities, reduce water loss, and lower operating costs.
[0005] This utility model is achieved in the following way: A dry-wet separation flat filter includes a housing, a filter screen, a transmission mechanism, a backwashing mechanism, and a scraper mechanism. The filter screen, transmission mechanism, backwashing mechanism, and scraper mechanism are all installed inside the housing. One end of the housing is connected to a water inlet trough, and a water inlet is opened at the connection between the water inlet trough and the housing. The filter screen is installed below the water inlet. The backwashing mechanism includes a backwashing pump, a backwashing nozzle assembly, and a backwashing cover. The backwashing pump is installed at the bottom of the housing and is connected to the backwashing nozzle assembly via a pipe. The backwashing nozzle assembly and the backwashing cover are installed on the transmission mechanism. The scraper mechanism includes a first baffle, a second baffle, a swinging scraper, and a scraper strip. The first and second baffles both pass through the inside of the housing and are fixed to the side walls of the housing. There are two swinging scrapers, which are installed on the left and right sides of the backwashing cover via a rotating shaft. The scraper strip is installed on the swinging scraper.
[0006] Furthermore, the top of the box is provided with an openable cover, and the bottom of the box is provided with a water outlet pipe, the end of which extends into the box and is at a certain height from the bottom of the box.
[0007] Furthermore, a drain trough is provided on the other end of the housing opposite to the water inlet trough. The drain trough is connected to the housing. One end of the filter screen is attached to the position below the water inlet, and the other end extends into the drain trough.
[0008] Furthermore, the filter screen is tilted towards the drain trough at an angle of 3 degrees, and the screen diameter is 200 mesh.
[0009] Furthermore, the transmission mechanism includes a motor, two sets of pulleys, two sets of slide rails, and a sliding plate. The two sets of pulleys are symmetrically installed on the inner walls of the left and right sides of the housing. Each set of pulleys has two pulleys, and a belt is sleeved between the two pulleys. The two opposite pulleys of the two sets of pulleys are connected by a bearing. The drive end of the motor is connected to one of the pulleys. A fixed plate is connected to each belt. The two sets of slide rails are symmetrically installed on the inner walls of the left and right sides of the housing, and the slide rails are installed above the pulleys. The sliding plate is installed between the two sets of slide rails by two pulleys. The upper ends of the two fixed plates are respectively connected to the left and right ends of the sliding plate. The lower ends of the two fixed plates are connected to a mounting plate, which is located below the filter screen. The two fixed plates, the sliding plate, and the mounting plate form a frame structure. The filter screen passes through the center of the frame structure. The backwash nozzle assembly is fixed on the mounting plate. The backwash cover is installed at the lower end of the sliding plate and corresponds to the position of the backwash nozzle assembly.
[0010] Furthermore, the pulley assembly is installed higher than the filter screen and parallel to the filter screen.
[0011] Furthermore, the transmission mechanism also includes two limit sensors, which are installed on the same side of the housing and located at the start and end points along the length of the filter screen. The limit sensors are electrically connected to the motor.
[0012] Furthermore, the backwash nozzle assembly includes multiple backwash nozzles arranged in an array, with the backwash nozzles facing the filter screen, and the backwash hood having a funnel-shaped cross-section.
[0013] Furthermore, the oscillating scraper includes a deflecting end, a connecting end, and a mounting end. The deflecting end and the mounting end are respectively connected to the upper and lower ends of the connecting end. The deflecting end is wedge-shaped and has an inwardly recessed guide groove on its back side. The height of the guide groove is consistent with the height of the first baffle. The connecting end has a raised support platform that rests against the outer wall of the backwash hood. The front end of the mounting end has a mounting plane, and the scraper is mounted on the mounting plane, resting against the top of the filter screen.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes an inclined filter screen and a reciprocating scraper mechanism to separate the filtered impurities into solid and liquid components. The separated solid impurities are scraped off and collected by the scraper mechanism. In addition, a backwashing mechanism is incorporated to rinse the filter screen with the filtered water, ensuring the filter screen's effectiveness while reducing the amount of water used for rinsing. Compared to traditional filter screen rinsing mechanisms, this reduces water loss by 98%, essentially achieving zero discharge and effectively lowering operating costs. Attached Figure Description
[0015] Appendix Figure 1 This is a top view of the dry-wet separation flat filter of this utility model; Appendix Figure 2 This is a schematic diagram of the dry-wet separation flat filter described in this utility model; Appendix Figure 3 This is a perspective view of the dry-wet separation flat filter of this utility model; Appendix Figure 4 It is attached Figure 2 The diagram shows the structure of the oscillating scraper. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments.
[0017] like Figures 1-3 As shown, a dry-wet separation flat filter includes a housing 1, a filter screen 2, a transmission mechanism 3, a backwashing mechanism 4, and a scraper mechanism 5. The housing 1 has a housing-type structure with a condensation space inside. The filter screen 2, the transmission mechanism 3, the backwashing mechanism 4, and the scraper mechanism 5 are all installed inside the housing 1.
[0018] One end of the housing 1 is connected to a water inlet trough 11, which is located in the upper middle part of the housing 1. A water inlet 111 is provided at the connection between the water inlet trough 11 and the housing 1. The water inlet trough 11 is used to receive water from the aquaculture pond, and the water enters the housing 1 through the water inlet 111. A sludge discharge trough 12 is provided on the other end of the housing 1 opposite to the water inlet trough 11. The sludge discharge trough 12 is connected to the housing 1 and is used to collect filter screen impurities scraped off the filter screen 2 by the scraper mechanism 4. A sludge discharge port is provided at the bottom of the sludge discharge trough 12, through which the collected impurities are discharged. Furthermore, a spiral waste conveyor is installed inside the sludge discharge trough 12. The conveyor is used to remove the relatively viscous solid impurities collected in the sewage trough 12; the top of the box 1 adopts an inclined slope structure design, with the top of the slope located on one side of the water inlet trough 11 and the bottom of the slope located on one side of the sewage trough 12. The top of the box 1 is provided with an openable cover plate 13, which facilitates the maintenance of the mechanism of the box 1; the bottom of the box 1 is provided with a water outlet pipe 14, through which the filtered water is discharged. The end of the water outlet pipe 14 extends into the box 1 and maintains a certain height with the bottom of the box 1, so that the water in the box 1 is not completely drained, and a certain amount of water is retained to facilitate the backwashing mechanism 4 to use water to wash the filter screen 2.
[0019] The filter screen 2 is installed inside the housing 1. One end of the filter screen 2 is attached to the position below the water inlet, and the other end extends into the sewage tank 12. Preferably, the filter screen 2 is inclined towards the sewage tank 12 at an angle of 3 degrees to facilitate the entry of impurities into the sewage tank 12. The filter screen 2 is used to filter out impurities in the water. The mesh size of the filter screen 2 is 200 mesh. Larger impurities such as food residue, feces, and solid particles in the water are isolated by the filter screen.
[0020] The transmission mechanism 3 is installed inside the housing 1. The transmission mechanism 3 includes a motor 31, a pulley set 32, a slide rail 33, and a sliding plate 34. There are two sets of pulley sets 32, which are symmetrically installed on the inner walls of the left and right sides of the housing 1. The pulley sets 32 are installed higher than the filter screen 2 and parallel to the filter screen 2. Each pulley set 32 has two pulleys, and the distance between the two pulleys is greater than the length of the filter screen 2. A belt 321 is sleeved between the two pulleys. The two oppositely arranged pulleys of the two sets of pulley sets 32 are connected together. The pulleys are connected by a bearing (described in red on the backwash bracket). The motor 31 is mounted on the outer wall of the housing 1. The drive end of the motor 31 passes through the housing 1 and connects to one of the pulleys, driving the pulley to rotate. Under the drive of the belts 321 and the bearing, the four pulleys rotate synchronously. Each belt 321 is connected to a fixed plate 322. There are two sets of slide rails 33, which are symmetrically installed on the inner walls of the left and right sides of the housing 1. Above the pulley assembly 32, the sliding plate 34 is mounted between two sets of slide rails 33 via two pulleys, allowing the sliding plate 34 to slide between the two sets of slide rails 33. The upper ends of the two fixed plates 322 are respectively connected to the left and right ends of the sliding plate 34, so that when the fixed plates 322 move, they can drive the sliding plate 34 to move. The lower ends of the two fixed plates 322 are connected to a mounting plate 323, which is located at the lower end of the filter screen 2. The mounting plate 323 is connected to the backwashing mechanism 4. The two fixed plates 322 and the sliding plate 34 are connected to the sliding plate 34. 4 and mounting plate 323 form a frame structure. The filter screen 2 passes through the center of the frame structure. Furthermore, the transmission mechanism 3 also includes two limit sensors 35. The limit sensors 35 are installed on the same side of the housing 1 and are located at the start and end positions of the filter screen 2 in the length direction. The limit sensors 35 are electrically connected to the motor 31. The limit sensors 35 are used to determine the position of the mounting plate 323. When the mounting plate 323 moves to a position of a limit sensor 35, the limit sensor 35 sends a signal, and the motor 31 stops or rotates in the opposite direction.
[0021] The backwashing mechanism 4 is used to wash away residual impurities on the filter screen 2. It includes a backwashing pump 41, a backwashing nozzle assembly 42, and a backwashing hood 43. The backwashing pump 41 is installed at the bottom of the housing 1 and is connected to the backwashing nozzle assembly 42 via a pipe. The backwashing nozzle assembly 42 is fixed on the mounting plate 323 and can move with the mounting plate 322. When the belt 321 moves the mounting plate 322, the backwashing nozzle assembly 42 can also move synchronously with the mounting plate 322. The backwashing nozzle assembly 42 includes multiple backwashing nozzles arranged in an array, with the backwashing nozzles facing the filter screen 2. The backwashing pump 41 moves the filter screen 2. The water at the bottom is flushed at high speed through the backwash nozzles to wash away the impurities remaining on the filter screen 2. The backwash cover 43 is installed at the lower end of the sliding plate 34 and corresponds to the position of the backwash nozzle assembly 42. The backwash cover 43 has a funnel-shaped structure in cross section. The backwash nozzles are set facing the backwash cover 43. The backwash cover 43 is used to block the water sprayed from the backwash nozzles to prevent splashing. When the backwash nozzles spray water to flush the filter screen 2, the splashed water and the residue on the filter screen 2 are blocked by the backwash cover 43 and fall back onto the filter screen 2. This can thoroughly wash away the substances attached to the filter screen 2 and effectively prevent water splashing.
[0022] The scraper mechanism 5 is used to scrape off impurities on the filter screen. The scraper mechanism 5 includes a first baffle 51, a second baffle 52, a swinging scraper 53, and a scraper strip 54. The first baffle 51 and the second baffle 52 are both cylindrical structures. Both the first baffle 51 and the second baffle 52 pass through the interior of the housing 1 and are fixed to the side walls of the housing 1. The first baffle 51 and the second baffle 52 are both positioned above the slide rail 33 and on the left and right sides of the slide rail. The first baffle 51 and the second baffle 52 are used to actuate the swinging scraper 53. There are two swinging scrapers 53, which are mounted on the left and right sides of the backwash hood 43 via a rotating shaft. Figure 4As shown, the oscillating scraper 53 includes an actuating end 531, a connecting end 532, and a mounting end 533. The actuating end 531 and the mounting end 533 are respectively connected to the upper and lower ends of the connecting end 532. The actuating end 531 is wedge-shaped, and its back side has an inwardly recessed guide groove 534. The height of the guide groove 534 is approximately the same as the height of the first baffle 51. The connecting end 532 has a raised support platform 535. Under normal conditions, the support platform 535 rests against the outer wall of the backwash hood 43. When the actuating end 531 is activated, the scraper 531 is activated. When the moving end 531 moves to the position of the second stop bar 52, under the action of the second stop bar 52, the moving end 531 rotates counterclockwise around the pivot. The front end of the mounting end 533 has a mounting surface, and the scraper 54 is mounted on the mounting surface. The scraper 54 is made of rubber material and has a certain corrosion resistance. The scraper 54 is held above the filter screen 2 and is used to scrape off the impurities attached to the filter screen 2. After the motor 31 starts, the drive belt 321 drives the swing scraper 53 to the position of the first stop bar 51. When the actuating end 531 is in position, under the blocking effect of the first stop bar 51, it drives the entire swing scraper 53 to rotate clockwise around the pivot axis. The first stop bar 51 is engaged in the guide groove 534. At this time, a limit sensor 35 senses the position of the mounting plate 323, the drive motor 31 stops running, and the scraper 54 moves downward to contact the filter screen 2. The scraper 54 abuts against the filter screen 2. When the motor 31 rotates in the opposite direction, it drives the scraper 54 to move along the surface of the filter screen 2, scooping up the filtered impurities on the filter screen 2 and pushing it forward. When the belt 321 drives the oscillating scraper 53 to the position of the second stop bar 52, the actuating end 531, under the blocking of the second stop bar 52, drives the entire oscillating scraper 53 to rotate counterclockwise around the axis of rotation. At this time, another limit sensor 35 senses the position of the mounting plate 323, the drive motor 31 stops rotating, the actuating end 531 abuts against the top of the backwash cover 43, the scraper 54 tilts upward and disengages from the filter screen 2, and pushes the scooped-up impurities into the drain trough 12, completing one cleaning cycle, and repeating this process.
[0023] The working principle of this utility model is as follows: The aquaculture water is transported to the inlet tank 11 through a pipe and enters the tank 1 through the inlet 111. Impurities in the water are intercepted by the filter screen 2. When there are many impurities remaining on the filter screen 2, the motor 31 starts and drives the belt 321 to move the swing scraper 53 to the first stop 51 position. Under the blocking of the first stop 51, the actuating end 531 drives the entire swing scraper 53 to rotate clockwise around the axis of rotation. The first stop 51 is engaged in the guide groove 534. At this time, a limit sensor 35 senses the position of the mounting plate 323, the drive motor 31 stops running, and the scraper 54 moves downward to contact the filter screen 2. The scraper 54 abuts against the filter screen 2. When the motor 31 rotates in the opposite direction, it drives the scraper 54 to move along the surface of the filter screen 2, scooping up the filtered impurities on the filter screen 2 and pushing it forward. When the belt 321 drives the swing scraper 53 to the second stop 52 position, the actuating end 531 in the second stop... Under the blockage of strip 52, the entire swing scraper 53 rotates counterclockwise around the axis of rotation. At this time, another limit sensor 35 senses the position of the mounting plate 323, the drive motor 31 stops rotating, the agitator end 531 abuts against the top of the backwash cover 43, the scraper 54 tilts upward and disengages from the filter screen 2, and pushes the scooped-up impurities into the drain trough 12, completing one cleaning cycle. This is repeated. Since the collected impurities only contain a small amount of water, dry and wet separation is achieved, and the collected impurities can be used directly. When the impurities on the filter screen 2 clog the filter screen, the backwash pump 41 starts and uses the water at the bottom of the tank 1 to flush the filter screen 2 at high speed through the backwash nozzle, washing off the impurities remaining on the filter screen 2. When the backwash nozzle sprays water to flush the filter screen 2, the splashed water and the residue on the filter screen 2 are blocked by the backwash cover 43 and fall back onto the filter screen 2, thereby preventing the filter screen from clogging and effectively preventing water splashing, and realizing water reuse.
[0024] This invention utilizes an inclined filter screen and a reciprocating scraper mechanism to separate the filtered impurities into solid and liquid components. The separated solid impurities are scraped off and collected by the scraper mechanism. In addition, a backwashing mechanism is incorporated to rinse the filter screen with the filtered water, ensuring the filter screen's effectiveness while reducing the amount of water used for rinsing. Compared to traditional filter screen rinsing mechanisms, this reduces water loss by 98%, essentially achieving zero discharge and effectively lowering operating costs.
[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A dry-wet separation flat filter, comprising a housing (1), a filter screen (2), a transmission mechanism (3), a backwashing mechanism (4), and a scraper mechanism (5), wherein the filter screen (2), the transmission mechanism (3), the backwashing mechanism (4), and the scraper mechanism (5) are all installed inside the housing (1), characterized in that: One end of the housing (1) is connected to a water inlet tank (11), and a water inlet (111) is opened at the connection between the water inlet tank (11) and the housing (1). The filter screen (2) is installed below the water inlet (111). The backwashing mechanism (4) includes a backwashing pump (41), a backwashing nozzle assembly (42), and a backwashing hood (43). The backwashing pump (41) is installed at the bottom of the housing (1), and the backwashing pump (41) is connected to the backwashing nozzle assembly (42) through a pipe. The backwashing nozzle assembly (42) and the backwashing hood (43) The backwash hood (43) is installed on the transmission mechanism (3). The scraper mechanism (5) includes a first baffle (51), a second baffle (52), a swing scraper (53), and a scraper (54). The first baffle (51) and the second baffle (52) both pass through the inside of the housing (1) and are fixed on the two side walls of the housing (1). There are two swing scrapers (53). The two swing scrapers (53) are installed on the left and right sides of the backwash hood (43) through a rotating shaft. The scraper (54) is installed on the swing scraper (53).
2. The dry-wet separation flat filter according to claim 1, characterized in that: The top of the box (1) is provided with an openable cover plate (13), and the bottom of the box (1) is provided with a water outlet pipe (14). The end of the water outlet pipe (14) extends into the box (1) and maintains a certain height with the bottom of the box (1).
3. The dry-wet separation flat filter according to claim 1, characterized in that: A drain trough (12) is provided on the other end of the housing (1) relative to the water inlet trough (11). The drain trough (12) is connected to the housing (1). One end of the filter screen (2) is attached to the position below the water inlet, and the other end extends into the drain trough (12).
4. The dry-wet separation flat filter according to claim 1, characterized in that: The filter screen (2) is inclined towards the drain trough (12) at an angle of 3 degrees, and the mesh size of the filter screen (2) is 200 mesh.
5. The dry-wet separation flat filter according to claim 1, characterized in that: The transmission mechanism (3) includes a motor (31), two sets of pulleys (32), two sets of slide rails (33), and a sliding plate (34). The two sets of pulleys (32) are symmetrically installed on the inner walls of the left and right sides of the housing (1). Each set of pulleys (32) has two pulleys, and a belt (321) is sleeved between the two pulleys. The two opposite pulleys of the two sets of pulleys (32) are connected by a bearing. The drive end of the motor (31) is connected to one of the pulleys. A fixing plate (322) is connected to each belt (321). The two sets of slide rails (33) are symmetrically installed on the inner walls of the left and right sides of the housing (1), and the slide rails (33) are mounted on the pulleys. Above the group (32), the sliding plate (34) is installed between the two groups of slide rails (33) by two pulleys. The upper ends of the two fixed plates (322) are respectively connected to the left and right ends of the sliding plate (34). The lower ends of the two fixed plates (322) are connected to an mounting plate (323). The mounting plate (323) is located at the lower end of the filter screen (2). The two fixed plates (322), the sliding plate (34) and the mounting plate (323) form a frame structure. The filter screen (2) passes through the center of the frame structure. The backwash nozzle group (42) is fixed on the mounting plate (323). The backwash cover (43) is installed at the lower end of the sliding plate (34) and corresponds to the position of the backwash nozzle group (42).
6. The dry-wet separation flat filter according to claim 5, characterized in that: The pulley assembly (32) is installed higher than the filter screen (2) and parallel to the filter screen (2).
7. The dry-wet separation flat filter according to claim 5, characterized in that: The transmission mechanism (3) also includes two limit sensors (35). The limit sensors (35) are installed on the same side of the housing (1) and located at the start and end points of the filter screen (2) along its length. The limit sensors (35) are electrically connected to the motor (31).
8. The dry-wet separation flat filter according to claim 5, characterized in that: The backwash nozzle assembly (42) includes multiple backwash nozzles arranged in a row, with the backwash nozzles facing the filter screen (2), and the backwash cover (43) has a funnel-shaped cover structure in cross section.
9. The dry-wet separation flat filter according to claim 1, characterized in that: The oscillating scraper (53) includes a toggle end (531), a connecting end (532), and a mounting end (533). The toggle end (531) and the mounting end (533) are respectively connected to the upper and lower ends of the connecting end (532). The toggle end (531) is wedge-shaped and has an inwardly recessed guide groove (534) on its back side. The height of the guide groove (534) is consistent with the height of the first baffle (51). The connecting end (532) has a raised support platform (535) that abuts against the outer wall of the backwash hood (43). The front end of the mounting end (533) has a mounting plane. The scraper (54) is mounted on the mounting plane and abuts against the top of the filter screen (2).