V-shaped filter tank backwashing device

Abstract

The utility model discloses a V-shaped filter tank backwashing device, the V-shaped filter tank comprises a box body, a backwashing drainage tank arranged in the box body and a water and gas distribution channel connected with a backwashing water source and a backwashing gas source, the backwashing drainage tank and the water and gas distribution channel divide the internal space of the box body into a backwashing process cavity and a filter cavity which are mutually independent and are communicated at the tops; and the water and gas distribution channel is communicated with the filter cavity. According to the utility model, a gas backwashing medium is introduced, formed bubbles can scatter impurities in water and are combined with water flow backwashing to form backwashing in various forms, the backwashing strength is higher, and a better backwashing effect can be generated.

Description

Technical Field

[0001] The utility model relates to water treatment equipment, and more specifically, to an anti-backwashing device for a V-shaped filter tank. Background Art

[0002] The V-shaped filter tank is a commonly used water treatment equipment for removing suspended solids and impurities in water. After long-term use, the filter media in the filter tank will gradually be contaminated and need to be backwashed to clean the filter media. Traditional anti-backwashing devices for V-shaped filter tanks usually include drainage valves, regulating valves, backwashing pumps and other components. The backwashing pump sends clear water into the filter tank through a pipeline, and at the same time, the drainage valve is opened to discharge the sewage from the filter tank, so as to realize the operation of backwashing drainage. However, this solution only relies on the water flow power provided by the backwashing pump to drive the backwashing water to flow in the reverse direction, and the backwashing intensity is insufficient, which easily causes the problem of incomplete backwashing, resulting in the filter media not being completely cleaned, affecting the normal operation of the filter tank. In addition, there are also problems such as complex operation and high energy consumption. The utility model with the publication number CN218810786U discloses a filter tank backwashing drainage device, which includes a drainage gate, a water conveying member and a backwashing wastewater tank located below the drainage gate. The rear side of the drainage gate can be connected to the backwashing drainage channel tank through the water conveying member; when the drainage gate is in the open state, the backwashing water in the filter tank can flow into the backwashing wastewater tank through the drainage gate and the water conveying member in sequence. The backwashing working mode of this utility model is basically the same as that of the prior art, so there are also problems of insufficient backwashing intensity and incomplete backwashing. Summary of the Utility Model

[0003] The existing anti-backwashing device for V-shaped filter tanks has problems of insufficient backwashing intensity and incomplete backwashing. To overcome these defects, the utility model provides an anti-backwashing device for V-shaped filter tanks, which can improve the backwashing intensity and the backwashing effect.

[0004] The technical solution of the present utility model is: a backwashing device for a V-shaped filter. The V-shaped filter includes a box body, which includes a backwashing drain trough arranged inside the box body and a water and gas distribution channel connected to a backwashing water source and a backwashing gas source. The backwashing drain trough and the water and gas distribution channel divide the internal space of the box body into an independent backwashing process chamber and a filter chamber that communicate at the top. The water and gas distribution channel communicates with the filter chamber. When the V-shaped filter is normally performing water treatment work, no water and gas are input into the water and gas distribution channel, and it is only used as a water flow channel. The water to be treated is input into the filter chamber and filtered through the filtering element at the bottom of the filter chamber to purify the water. The purified water penetrates below the filter chamber and is then discharged from the box body through the water and gas distribution channel. When the V-shaped filter is maintained and cleaned, pressurized cleaning water and air are introduced into the water and gas distribution channel. The cleaning water and air pass through the filtering element from below the filter chamber and enter the filter chamber in the reverse direction, and blow and wash the impurities precipitated by filtration to make the impurities loose and floating. When the water level in the filter chamber reaches the height of the entrance of the backwashing process chamber, the impurities flow into the backwashing process chamber with the overflowing water and are discharged through the backwashing drain trough, thus completing the backwashing. The present utility model introduces a gas cleaning medium, and the formed bubbles can disperse the impurities. Combined with the water flow backwashing, various forms of backwashing are formed, resulting in a better backwashing effect.

[0005] Preferably, a filter plate is provided at the bottom of the box body, and the filter plate is the bottom of the filter chamber. The filter plate divides the internal space of the box body into upper and lower layers. At the same time, the filter plate is also the carrier of the filtering element. The water to be treated and being treated is in the upper layer, and the treated water is in the lower layer.

[0006] Preferably, the backwashing drain trough includes a pair of weir plates and a trough bottom plate. The weir plates are fixed to the bottom of the box body, and the trough bottom plate is fixed between the two weir plates. The weir plates and the trough bottom plate enclose the backwashing process chamber. The weir plates separate the backwashing process chamber and the filter chamber, making the backwashing process chamber and the filter chamber independent of each other.

[0007] Preferably, the trough bottom plate is inclined. The bottom of the backwashing drain trough is formed by the trough bottom plate. The inclined trough bottom plate can make the overflowing water carry impurities into the backwashing drain trough during backwashing and flow naturally to the lower place under the action of gravity, and be discharged from the backwashing drain trough, with thorough drainage and no energy consumption.

[0008] Preferably, an input water trough extending along the inner wall of the box body is provided at the top of the box body, and water distribution holes are provided at the bottom of the input water trough. The water to be treated first enters the input water trough and then leaks down from the input water trough through the water distribution holes, so that the water is dispersed and input into the box body, making the water flow gentle, and avoiding the water to be treated falling into the box body in the form of a thicker water column and generating a greater impact, which in turn hinders the formation of a static internal environment conducive to impurity precipitation when the V-shaped filter is normally performing water treatment work.

[0009] Preferably, a flow guide plate connecting the input water tank and the inner wall of the box body is provided below the water distribution holes. The flow guide plate can prevent the water to be treated from dripping freely in the form of water droplets and forming impacts. When the water in the input water tank flows out from the water distribution holes, it flows down along the flow guide plate, so that the water to be treated is more gently diverted into the box body.

[0010] Preferably, an exhaust pipe is connected to the water and gas distribution channel. The exhaust pipe is used to adjust the air pressure in the water and gas distribution channel to prevent excessive air pressure in the water and gas distribution channel from forming air resistance.

[0011] Preferably, it further includes a backwash air inlet pipe and a backwash water inlet pipe, and the backwash air inlet pipe and the backwash water inlet pipe are communicated with the water and gas distribution channel. The backwash air inlet pipe and the backwash water inlet pipe are used to connect the water and gas distribution channel to an external backwash water source and a backwash gas source.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The present utility model introduces a gas backwash medium, and the formed bubbles can disperse impurities in the water. Combined with the water flow backwash, various forms of backwash are formed, and the backwash intensity is greater, which can produce a better backwash effect. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of one kind of the present utility model.

[0015] Figure 2 It is a schematic structural diagram of a V-shaped filter tank applying the present utility model.

[0016] Figure 3 It is a schematic structural diagram of an integrated water purification device applying the present utility model.

[0017] Figure 4 It is a partial structural schematic diagram of the V-shaped filter tank where the present utility model is located.

[0018] Figure 5 It is a schematic structural diagram of a weir plate in the present utility model.

[0019] Figure 6 It is a general pipeline diagram of the integrated water purification device applying the present utility model.

[0020] In the figure, 1 - box body, 2 - backwash drain tank, 3 - water and gas distribution channel, 4 - weir plate, 5 - filter cavity, 6 - filter plate, 7 - backwash drain pipe, 8 - input water tank, 9 - water distribution holes, 10 - flow guide plate, 11 - backwash air inlet pipe, 12 - backwash water inlet pipe, 13 - tank bottom plate, 14 - ventilation holes, 15 - water through holes, 16 - filter head, 17 - grid reaction tank, 18 - sedimentation tank, 19 - maintenance hole, 20 - main process pipe, 21 - static mixer, 22 - PAC pipe, 23 - disinfection chemical addition pipe, 24 - backwash sewage pipe, 25 - exhaust pipe. Detailed implementation mode

[0021] The following further describes the present utility model with reference to the accompanying drawings and specific embodiments.

[0022] Embodiment 1:

[0023] As Figures 1 to 6 shown, a backwashing device for a V-shaped filter tank is provided. The V-shaped filter tank is located downstream of a grid reaction tank 17 and a sedimentation tank 18. The grid reaction tank 17, the sedimentation tank 18, and the V-shaped filter tank are arranged in sequence to form an integrated water purification device. The V-shaped filter tank includes a cuboid-shaped box body 1 made of stainless steel. Inside the box body 1, there is a filter plate 6 near the bottom. The filter plate 6 divides the internal space of the box body 1 into upper and lower layers. The backwashing device for this V-shaped filter tank includes a backwashing drain trough 2 and a water distribution and air distribution channel 3. Both the backwashing drain trough 2 and the water distribution and air distribution channel 3 are arranged inside the box body 1 and are both arranged along the central axis of the box body 1. The water distribution and air distribution channel 3 is also a purified water discharge channel. The water to be treated and in the process of treatment is in the upper layer of the box body 1, and the treated water enters the lower layer of the box body 1 and is discharged through the water distribution and air distribution channel 3. The backwashing drain trough 2 includes a pair of weir plates 4 and a trough bottom plate 13. The weir plates 4 are welded and fixed to the bottom of the box body 1, and both sides of the trough bottom plate 13 are welded to the two weir plates 4 respectively. The trough bottom plate 13 is inclined. One end of the trough bottom plate 13 is close to the end of the integrated water purification device and is higher at this end. The other end of the trough bottom plate 13 is close to the sedimentation tank 18 and is lower at the end close to the sedimentation tank 18. The weir plates 4 divide the internal space of the upper layer of the box body 1 into a backwashing process chamber and a filter chamber 5. Both the backwashing drain trough 2 and the water distribution and air distribution channel 3 are located in the backwashing process chamber. The part enclosed by the weir plates and the trough bottom plate 13 constitutes the trough cavity of the backwashing drain trough 2, and below the trough bottom plate 13 is the water distribution and air distribution channel 3. The part of the upper layer of the box body 1 other than the backwashing process chamber is the filter chamber 5. The filter plate 6 constitutes the bottom of the filter chamber 5. The backwashing process chamber and the filter chamber 5 are independent of each other and the tops of the backwashing process chamber and the filter chamber 5 are both open. A filtering device is provided at the bottom of the filter chamber 5. The filtering device includes filter nozzles 16 and also includes filter materials such as quartz sand and pebble cushions. The filter nozzles 16 are buried in the filter materials. The filtering device is filter nozzles 16 made of ABS. The upper and lower ends of the filter nozzles 16 are through. The top of the filter nozzles 16 has a filter cap which has a filtering function and water can pass through. There are 1100 through holes arranged in an array on the filter plate 6, and the filter nozzles 16 are tightly and correspondingly installed in the through holes one by one.

[0024] The water and gas distribution channel 3 is formed by enclosing the weir plate 4, the bottom plate 13 of the tank and the bottom of the box body 1. Vent holes 14 are evenly distributed in the upper and middle parts of the corresponding weir plates 4 of the water and gas distribution channel 3, and water passing holes 15 are provided at the bottom of the weir plate 4, so that the water and gas distribution channel 3 is communicated with the filter cavity 5. The water and gas distribution channel 3 is connected to an external backwashing water source and a backwashing gas source through a backwashing air inlet pipe 11 and a backwashing water inlet pipe 12. The backwashing water source is a backwashing water pump, and the backwashing gas source is a backwashing air blower. A backwashing drain pipe 7 is connected to the backwashing drain tank 2, and the backwashing drain pipe 7 is located at the lower end of the bottom plate 13 of the tank. An exhaust pipe 25 is connected to the water and gas distribution channel 3, and a switching valve is provided on the exhaust pipe 25. An input water tank 8 is provided at the top of the box body 1. The input water tank 8 is fixed on the inner walls on both sides of the box body 1, extending from the front end to the end of the box body 1. The cross section of the input water tank 8 is V-shaped, and water distribution holes 9 are provided at the bottom of the input water tank 8. A flow guide plate 10 is provided below the water distribution holes 9, and the flow guide plate 10 straddles the input water tank 8 and the inner wall of the box body 1. A maintenance hole 19 is also provided at the bottom of the end of the box body 1, which is used as a passage for people during maintenance and is sealed and closed during non-maintenance periods.

[0025] The integrated water purification device operates under the control of a PLC. When performing water treatment, under the control of the PLC, the raw water to be treated is introduced into the integrated water purification device through the main process pipe 20. After the treatment is completed, the purified water generated is discharged through the main process pipe 20 extending from the end of the box body 1. The backwash inlet pipe 12 intersects and connects with the main process pipe 20 at the end of the box body 1. Before entering the integrated water purification device, the raw water first passes through a static mixer 21, and the static mixer 21 is also connected to a PAC pipe 22 and a disinfection chemical dosing pipe 23. The PAC pipe 22 is connected to a PAC chemical dosing device, and the disinfection chemical dosing pipe 23 is connected to a sodium hypochlorite generator. Under the control of the PLC, the dosing of the coagulant and disinfectant is automatically and efficiently completed, improving the overall working efficiency of the integrated water purification device. The raw water added with the coagulant and disinfectant flows out of the static mixer 21 and enters the grid reaction tank 17. The water flow forms turbulence after passing through the grids in the grid reaction tank 17, the proportion of micro-vortices increases, and the centrifugal inertial effect of the vortices increases, strengthening the number of particle collisions, making the floc particles grow from small to large and from loose to dense, and being more prone to precipitation. Then, the water flowing out of the grid reaction tank 17 enters the sedimentation tank 18 for sedimentation to complete the solid-liquid separation. The sedimented sludge falls into the sludge discharge pipe 24 and is transported to the sludge discharge tank for collection. The water after sedimentation flows through the input water tank 8 to the V-shaped filter tank for filtration. The water passes through the filter head 16 for filtration and then passes through the filter plate 6 into the lower layer of the box body 1, and then enters the water distribution and gas distribution channel 3 through the water passing hole 15. The purified water is discharged from the backwash inlet pipe 12 and output to a clear water tank for collection. From the clear water tank, it can be further transported to more water usage points. During the water treatment process, under the control of the PLC, the pumps and valves required for backwashing are deactivated, and the backwash function is shielded.After the integrated water purification equipment operates for a certain period of time, the backwashing program is enabled. During this period, the pumps and valves related to water treatment are all stopped, and the forward water treatment function is shielded. The backwashing process has three steps, namely air flushing, air-water mixed flushing, and water flushing. In the air flushing stage, the backwashing fan enters the water distribution and air distribution channel 3 from the backwashing intake pipe 11, then passes through the ventilation holes 14 on the weir plate 4, and enters the filter cavity 5 reversely through the filter head 16, mixing with the residual water in the filter head 16 and the filter cavity 5 to form bubbles, disturbing the impurities deposited on the filter head 16 and the filter plate 6, as well as the filter media on the filter plate 6, tearing, breaking, and dispersing the impurities attached to the filter head 16 and the filter media, and also turning the filter media, facilitating subsequent further cleaning; In the air-water mixed flushing stage, the backwashing fan blows the backwashing air flow, and the backwashing water pump pumps in the backwashing water flow, enters the water distribution and air distribution channel 3, then passes through the ventilation holes 14 and water passing holes 15 on the weir plate 4, and enters the filter cavity 5 reversely through the filter head 16. The impurities float up and are in a moving state under the impact of water and air, and the filter media are also in an unstable state under the impact of the air and water flow; In the water flushing stage, the backwashing water pump continuously pumps in the backwashing water to wash away the floating impurities and the remaining bubbles. At this time, under the control of the PLC, the input water tank 8 resumes water intake, causing the water level in the filter cavity 5 to rise. When the sewage and wastewater flow such as floating objects reaches the top notch of the backwashing drainage tank 2, it flows into the backwashing drainage tank 2, and then under the action of gravity, the sewage and wastewater flows along the inclined tank bottom plate 13 through the backwashing drainage pipe 7 into the backwashing sewage pipe 24, and the sewage and wastewater are discharged, ending the drainage process. The flow rate of the backwashing water flow pumped by the backwashing water pump is controlled within a reasonable range to prevent excessive water flow impact from washing the filter media too high and sending them into the backwashing drainage tank 2. Through this water-air combination method for backwashing, the filter media are re-adjusted and arranged to restore the filtering ability. At the same time, the high-speed water flow and air flow during backwashing are beneficial to cleaning the impurities attached to the inner wall of the V-shaped filter pool and the inner wall of the pipeline.

[0026] Embodiment 2:

[0027] Such as Figures 1 to 6As shown in the figure, a backwashing device for a V-shaped filter is provided. The V-shaped filter is located downstream of a grid flocculation tank 17 and a sedimentation tank 18. The grid flocculation tank 17, the sedimentation tank 18 and the V-shaped filter are arranged in sequence to form an integrated water purification device. The V-shaped filter includes a cuboid-shaped box body 1 made of stainless steel. Inside the box body 1, a filter plate 6 is provided near the bottom. The filter plate 6 divides the internal space of the box body 1 into upper and lower layers. The backwashing device for this V-shaped filter includes a backwashing drainage trough 2 and a water distribution and air distribution channel 3. Both the backwashing drainage trough 2 and the water distribution and air distribution channel 3 are arranged inside the box body 1, and both the backwashing drainage trough 2 and the water distribution and air distribution channel 3 are arranged along the central axis of the box body 1. The water distribution and air distribution channel 3 is also a purified water discharge channel. The water to be treated and in the process of treatment is in the upper layer of the box body 1, and the treated water enters the lower layer of the box body 1 and is discharged through the water distribution and air distribution channel 3. The backwashing drainage trough 2 includes a pair of weir plates 4 and a trough bottom plate 13. The weir plates 4 are welded and fixed to the bottom of the box body 1, and both sides of the trough bottom plate 13 are welded to the two weir plates 4 respectively. The trough bottom plate 13 is inclined. One end of the trough bottom plate 13 is close to the end of the integrated water purification device and is higher at this end. The other end of the trough bottom plate 13 is close to the sedimentation tank 18 and is lower at the end close to the sedimentation tank 18. The weir plates 4 divide the internal space of the upper layer of the box body 1 into a backwashing process chamber and a filter chamber 5. Both the backwashing drainage trough 2 and the water distribution and air distribution channel 3 are located in the backwashing process chamber. The part enclosed by the weir plates and the trough bottom plate 13 forms the trough cavity of the backwashing drainage trough 2, and below the trough bottom plate 13 is the water distribution and air distribution channel 3. The part of the upper layer of the box body 1 other than the backwashing process chamber is the filter chamber 5. The filter plate 6 forms the bottom of the filter chamber 5. The backwashing process chamber and the filter chamber 5 are independent of each other and the tops of the backwashing process chamber and the filter chamber 5 are open. A filtering device is provided at the bottom of the filter chamber 5. The filtering device includes filter nozzles 16 and also includes filter materials such as quartz sand and pebble cushion layers. The filter nozzles 16 are buried in the filter materials. The filtering device is a filter nozzle 16 made of ABS. The upper and lower ends of the filter nozzle 16 are through. The top of the filter nozzle 16 has a filter cap which has a filtering function and water can pass through. The filter plate 6 is provided with 1100 through holes arranged in a regular array, and the filter nozzles 16 are tightly and correspondingly installed in the through holes one by one.

[0028] The water and gas distribution channel 3 is formed by enclosing the weir plate 4, the bottom plate 13 of the trough and the bottom of the box body 1. Vent holes 14 are evenly distributed in the upper middle part of the corresponding weir plate 4 of the water and gas distribution channel 3, and water passing holes 15 are provided at the bottom of the weir plate 4, so that the water and gas distribution channel 3 is communicated with the filter cavity 5. The water and gas distribution channel 3 is connected to an external backwashing water source and a backwashing gas source through a backwashing air inlet pipe 11 and a backwashing water inlet pipe 12. The backwashing water source is a backwashing water pump, and the backwashing gas source is a backwashing air blower. A backwashing drain pipe 7 is connected to the backwashing drain trough 2, and the backwashing drain pipe 7 is located at the low end of the bottom plate 13 of the trough. An exhaust pipe 25 is connected to the water and gas distribution channel 3, and a switching valve is provided on the exhaust pipe 25. An input water trough 8 is provided at the top of the box body 1. The input water trough 8 is fixed on the inner walls on both sides of the box body 1 and extends from the front end to the end of the box body 1. The cross section of the input water trough 8 is V-shaped, and water distribution holes 9 are provided at the bottom of the input water trough 8. A flow guide plate 10 is provided below the water distribution holes 9, and the flow guide plate 10 straddles the input water trough 8 and the inner wall of the box body 1. Different from Embodiment 1, in this embodiment, in addition to a maintenance hole 19 provided at the bottom of the end of the box body 1, a maintenance hole 19 is also provided on the bottom plate 13 of the trough. The maintenance hole 19 is used as a passage for people during maintenance and is sealed and closed during non-maintenance periods.

[0029] The integrated water purification equipment operates under the control of a PLC. When performing water treatment, under the control of the PLC, the raw water to be treated is introduced into the integrated water purification equipment through the main process pipe 20. After the treatment is completed, the purified water generated is discharged through the main process pipe 20 extending from the end of the box body 1. The backwash inlet pipe 12 intersects and connects with the main process pipe 20 at the end of the box body 1. Before entering the integrated water purification equipment, the raw water first passes through a static mixer 21. The static mixer 21 is also connected to a PAC pipe 22 and a disinfection dosing pipe 23. The PAC pipe 22 is connected to a PAC dosing device, and the disinfection dosing pipe 23 is connected to a sodium hypochlorite generator. Under the control of the PLC, the dosing of coagulants and disinfectants is automatically and efficiently completed, improving the overall working efficiency of the integrated water purification equipment. The raw water added with coagulants and disinfectants flows out of the static mixer 21 and enters the grid reaction tank 17. The water flow forms turbulence after passing through the grids in the grid reaction tank 17. The proportion of micro-vortices increases, and the centrifugal inertial effect of the vortices increases, strengthening the number of particle collisions, making the floc particles grow from small to large and from loose to dense, and being more prone to precipitation. Then, the water flowing out of the grid reaction tank 17 enters the sedimentation tank 18 for sedimentation to complete solid-liquid separation. The sedimented sludge falls into the sludge discharge pipe 24 and is transported to the sludge discharge tank for collection. The water after sedimentation flows through the input water tank 8 to the V-type filter tank for filtration. The water passes through the filter head 16 for filtration and then passes through the filter plate 6 into the lower layer of the box body 1, and then enters the water distribution and air distribution channel 3 through the water passing holes 15, and the purified water is discharged from the main process pipe 20 and output to a clear water tank for collection. From the clear water tank, it can be further transported to more water use points. During the water treatment process, under the control of the PLC, the pumps and valves required for backwashing are deactivated, and the backwashing function is blocked.After the integrated water purification equipment operates for a certain period of time, the backwashing program is enabled. During this period, the pumps and valves related to water treatment are all deactivated, and the forward water treatment function is blocked. The backwashing process has three steps, namely air flushing, air-water mixed flushing, and water flushing. In the air flushing stage, the backwashing fan enters the water distribution and air distribution channel 3 from the backwashing intake pipe 11, then passes through the ventilation holes 14 on the weir plate 4, and reversely enters the filter cavity 5 through the filter head 16, mixing with the residual water in the filter head 16 and the filter cavity 5 to form bubbles, disturbing the impurities deposited on the filter head 16 and the filter plate 6, as well as the filter media on the filter plate 6, tearing, breaking, and dispersing the impurities attached to the filter head 16 and the filter media, and also turning the filter media, facilitating further cleaning in the subsequent process; In the air-water mixed flushing stage, the backwashing fan blows the backwashing air flow, and the backwashing water pump pumps in the backwashing water flow, which enters the water distribution and air distribution channel 3, then passes through the ventilation holes 14 and water passing holes 15 on the weir plate 4, and reversely enters the filter cavity 5 through the filter head 16. The impurities float up and are in a moving state under the impact of water and air, and the filter media is also in an unstable state under the impact of the air and water flow; In the water flushing stage, the backwashing water pump continuously pumps in the backwashing water to wash away the floating impurities and the remaining bubbles. At this time, under the control of the PLC, the input water tank 8 resumes water intake, causing the water level in the filter cavity 5 to rise. When the sewage and wastewater flow such as floating objects reaches the top notch of the backwashing drainage tank 2, it flows into the backwashing drainage tank 2, and then under the action of gravity, the sewage and wastewater flows along the inclined tank bottom plate 13 through the backwashing drain pipe 7 into the backwashing sewage pipe 24, and the sewage and wastewater is discharged, ending the drainage process. The flow rate of the backwashing water flow pumped by the backwashing water pump is controlled within a reasonable range to prevent excessive water flow impact from washing the filter media too high and sending it into the backwashing drainage tank 2. Through this water-air combination method for backwashing, the filter media is rearranged to restore the filtering ability. At the same time, the high-speed water flow and air flow during backwashing are beneficial to cleaning the impurities attached to the inner wall of the V-shaped filter pool and the inner wall of the pipeline.

Claims

1. A V-type filter backwashing device, the V-type filter comprising a housing (1), characterized in that: The invention comprises a backwash drainage trough (2) arranged in a housing (1) and a water and air distribution channel (3) connected to a backwash water source and a backwash air source. The backwash drainage trough (2) and the water and air distribution channel (3) divide the internal space of the housing (1) into a backwash process chamber and a filter chamber (5) which are independent of each other and connected at the top. The water and air distribution channel (3) is connected to the filter chamber (5).

2. The V-type filter backwashing device according to claim 1 is characterized in that: A suspended filter plate (6) is provided in the box body (1), and the filter plate (6) is the bottom of the filter cavity (5).

3. The V-type filter backwashing device according to claim 2 is characterized in that: The backwash drainage trough (2) comprises a pair of weir plates (4) and a trough bottom plate (13); the weir plates (4) are fixed to the bottom of the box body (1), and the trough bottom plate (13) is fixed between the two weir plates (4).

4. The V-type filter backwashing device according to claim 2 is characterized in that: The trough bottom plate (13) is arranged tilted.

5. The V-type filter backwashing device according to claim 1 is characterized in that: The top of the box body (1) is provided with an input water trough (8) extending along the inner wall of the box body (1), and the bottom of the input water trough (8) is provided with a water distribution hole (9).

6. The V-type filter backwashing device according to claim 5 is characterized in that: A guide plate (10) is provided below the water distribution hole (9) and connects the input water tank (8) and the inner wall of the box body (1).

7. The V-type filter backwashing device according to claim 1 is characterized in that: The water and gas distribution channel (3) is connected with an exhaust pipe.

8. The V-type filter backwashing device according to any one of claims 1 to 7, characterized in that: It also includes a backwash air inlet pipe (11) and a backwash water inlet pipe (12), and the backwash air inlet pipe (11) and the backwash water inlet pipe (12) are connected to the water and air distribution channel (3).

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