A high throughput filtration device and method

Abstract

A high processing capacity filtering device and method, by from the water distribution branch pipe derived raw water impact water distribution disc, water distribution disc makes the raw water direction from vertical downward changes to oblique upward, the pollutants carried in the oblique upward raw water are enriched in the upper space of the filter tank body, and the pollutants are allowed to be discharged through the cross-flow filter valve via the cross-flow filter pipeline; after the oblique upward raw water falls, the filtered layer inside the filter tank body is filtered, and then the filtered water is discharged from the water outlet pipeline. The invention changes the dead-end filtration concept of the traditional mechanical filtration to the cross-flow filtration concept, and through the water distribution structure, the pollutants originally accumulated on the upper surface of the filter layer are transferred to the upper space of the filter layer, and then the cross-flow filtration is discharged, so that the pollutants in the upper space of the filter layer are not excessively enriched. The invention greatly improves the processing capacity of the mechanical filter, reduces the required number of mechanical filters, reduces the land occupation space in water treatment pretreatment; safe to use, easy to operate and convenient to maintain.

Description

TECHNICAL FIELD

[0001] The present application relates to a high processing capacity filter device and method, belonging to the technical field of water treatment. BACKGROUND

[0002] Multi-medium filter is also called mechanical filter, which mainly removes suspended solids and solid particles in water, and is widely used in water treatment process to achieve turbidity removal, water softening, electrodialysis and reverse osmosis pretreatment, and can also be used for removing silt in surface water and groundwater. Suspended solids are non-dissolved and non-colloidal solid substances in water, which can be precipitated under suitable conditions. The weight difference before and after the filtration of suspended solids by the filter is used as the basis for measuring the effect of the filter. The traditional mechanical filter fills high-quality uniform gravel, quartz sand, magnetite, anthracite, granular activated carbon, KDF and granular porous ceramic in the pressure vessel, and the fillers are scientifically and orderly distributed in the filter tank according to their specific gravity and particle size, so as to achieve the filtering effect.

[0003] At present, the mechanical filter commonly used in the water treatment industry usually has a low filtering speed, generally 8-12 m / h, which leads to a low processing capacity. When a large amount of water is treated, if the filtering speed in the tank is blindly increased, the filtering layer will be quickly clogged, and deep clogging and other problems will occur, which leads to the fact that the processing capacity of the mechanical filter cannot be effectively improved. Although multiple mechanical filter devices are connected in parallel, the processing capacity demand can be met, but this will lead to a large occupation area of the mechanical filter, and the site space cannot be effectively utilized. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a high processing capacity filter device and method, which solves the problem of low processing capacity and filtering efficiency of a single filter in the traditional technology.

[0005] The technical solution of the present application to solve the above technical problems is as follows: a high processing capacity filter device, comprising a water inlet valve, a water inlet main pipe, a filter tank, a water distribution pipeline, a water distribution branch pipe, a water distribution adjusting frame, a water distribution plate, a cross-flow filter pipeline, a cross-flow filter valve and a water outlet pipeline.

[0006] The water inlet valve is connected to the inlet end of the water inlet main pipe, the water inlet main pipe passes through the filter tank and is connected to the water distribution pipeline; the lower part of the water distribution pipeline is connected to a plurality of water distribution branch pipes; the outlet end of the water distribution branch pipe is connected to the water distribution plate through the water distribution adjusting frame.

[0007] The cross-flow filter pipeline is connected to the filter tank, the outlet end of the cross-flow filter pipeline is connected to the cross-flow filter valve, and the height of the connection between the cross-flow filter pipeline and the filter tank is higher than the height of the water distribution plate; the water outlet pipeline is connected to the bottom of the filter tank.

[0008] After the raw water from the distribution branch pipe impacts the water distribution tray, the water distribution tray changes the direction of the raw water from vertical downward to oblique upward, the pollutants carried in the oblique upward raw water are enriched in the upper space of the filter tank body, and the pollutants are allowed to be discharged through the cross-flow filter valve via the cross-flow filter pipe; the oblique upward raw water falls and is filtered through the filter layer inside the filter tank body, and then is discharged from the water outlet pipe.

[0009] As a preferred scheme of the high-treatment-capacity filter device, an exhaust pipe and an exhaust valve are further included; the air inlet end of the exhaust pipe is connected to the top of the filter tank body, and the exhaust valve is connected to the air outlet end of the exhaust pipe.

[0010] As a preferred scheme of the high-treatment-capacity filter device, a gas backwashing air inlet valve, a gas backwashing air inlet pipe, a gas backwashing main pipe and a gas backwashing branch pipe are further included; the gas backwashing air inlet valve is connected to the air inlet end of the gas backwashing air inlet pipe, the air outlet end of the gas backwashing air inlet pipe is communicated with the gas backwashing main pipe inside the filter tank body; the gas backwashing main pipe and the gas backwashing branch pipe are fixed by a support beam; the gas backwashing branch pipe is provided with an air outlet hole.

[0011] As a preferred scheme of the high-treatment-capacity filter device, a backwashing drainage main pipe, a first backwashing drainage branch pipe, a second backwashing drainage branch pipe, a backwashing water outlet valve and a backwashing water outlet standby valve are further included; the inlet end of the backwashing drainage main pipe is connected to the top of the filter tank body, the outlet end of the backwashing drainage main pipe, the inlet end of the first backwashing drainage branch pipe and the inlet end of the second backwashing drainage branch pipe are connected by a tee joint;

[0012] The backwashing water outlet valve is connected to the outlet end of the first backwashing drainage branch pipe, and the backwashing water outlet standby valve is connected to the outlet end of the second backwashing drainage branch pipe.

[0013] As a preferred scheme of the high-treatment-capacity filter device, the water outlet pipe is connected with a backwashing water inlet pipe and a water outlet branch pipe through a tee joint; the backwashing water inlet pipe is connected with a backwashing water inlet valve; the end of the water outlet branch pipe is connected with a water outlet control valve.

[0014] As a preferred scheme of the high-treatment-capacity filter device, the water outlet branch pipe is connected with a water outlet sampling pipe, the water outlet sampling pipe is provided with a water outlet sampling valve; the water outlet sampling pipe is connected with a water pressure gauge.

[0015] As a preferred scheme of the high-treatment-capacity filter device, the filter tank body is provided with a manhole, the filter tank body is connected with a discharging pipe, and the end of the discharging pipe is provided with a discharging blind flange.

[0016] As a preferred scheme of the high-treatment-capacity filter device, the side of the filter tank body is connected with an upper sight glass and a lower sight glass.

[0017] As a preferred scheme of the high-treatment-capacity filter device, the water outlet pipeline is connected with an emptying branch pipe, and the end of the emptying branch pipe is connected with an emptying valve.

[0018] The water outlet pipeline is connected with a gas backwashing standby branch pipe, and the end of the gas backwashing standby branch pipe is connected with a gas backwashing gas inlet standby valve.

[0019] The application further provides a high-treatment-capacity filtering method, which adopts the high-treatment-capacity filter device and comprises a cross-flow pollution discharge process.

[0020] After the raw water guided from the water distribution branch pipe impacts the water distribution disc, the water distribution disc changes the direction of the raw water from vertical downward to oblique upward, the pollutants carried in the oblique upward raw water are enriched in the upper space of the filter tank body, and the pollutants are allowed to be discharged through the cross-flow filter pipeline via the cross-flow filter valve; after the oblique upward raw water falls, the water is filtered through the filter layer inside the filter tank body and then discharged from the water outlet pipeline.

[0021] The application has the following beneficial effects: after the raw water guided from the water distribution branch pipe impacts the water distribution disc, the water distribution disc changes the direction of the raw water from vertical downward to oblique upward, the pollutants carried in the oblique upward raw water are enriched in the upper space of the filter tank body, and the pollutants are allowed to be discharged through the cross-flow filter pipeline via the cross-flow filter valve; after the oblique upward raw water falls, the water is filtered through the filter layer inside the filter tank body and then discharged from the water outlet pipeline. The application changes the dead-end filtration concept of the traditional mechanical filter into the cross-flow filtration concept, and through the water distribution structure, the pollutants originally accumulated on the upper surface of the filter layer are transferred to the upper space of the filter layer, and then the pollutants in the upper space of the filter layer are discharged through the cross-flow filtration, so that the pollutants in the upper space of the filter layer are not excessively enriched. Compared with the traditional mechanical filter, the application has a super-high treatment capacity, greatly improves the treatment capacity of the mechanical filter, reduces the number of mechanical filters required, and reduces the land occupation in the pretreatment of water treatment; the application is safe to use, easy to operate, and convenient to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor.

[0023] The structure, proportion, size and the like shown in the specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and do not have technical substantial meaning, and any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0024] Figure 1 The internal structure schematic diagram of the high-treatment-capacity filtering device provided in the embodiment of the present application is shown in the figure.

[0025] Figure 2 The first perspective side view schematic diagram of the high-treatment-capacity filtering device provided in the embodiment of the present application is shown in the figure.

[0026] Figure 3 The second perspective side view schematic diagram of the high-treatment-capacity filtering device provided in the embodiment of the present application is shown in the figure.

[0027] Figure 4 The top view structure schematic diagram of the high-treatment-capacity filtering device provided in the embodiment of the present application is shown in the figure.

[0028] In the figure, 1 is a water inlet valve, 2 is a water inlet main pipe, 3 is a filtering tank, 4 is a water distribution pipeline, 5 is a water distribution branch pipe, 6 is a water distribution adjusting frame, 7 is a water distribution disc, 8 is a cross-flow filtering pipeline, 9 is a cross-flow filtering valve, 10 is a water outlet pipeline, 11 is an exhaust pipeline, 12 is an exhaust valve, 13 is a gas backwashing air inlet valve, 14 is a gas backwashing air inlet pipeline, 15 is a gas backwashing main pipe, 16 is a gas backwashing branch pipe, 17 is a backwashing water discharge main pipe, 18 is a first backwashing water discharge branch pipe, 19 is a second backwashing water discharge branch pipe, 20 is a backwashing water outlet valve, 21 is a backwashing water inlet valve, 22 is a backwashing water outlet standby valve, 23 is a water outlet branch pipe, 24 is a backwashing water inlet valve, 25 is a water outlet control valve, 26 is a water outlet sampling pipeline, 27 is a water outlet sampling valve, 28 is a water outlet pressure gauge, 29 is a manhole, 30 is a discharging pipeline, 31 is a discharging blind flange, 32 is an upper sight glass, 33 is a lower sight glass, 34 is a emptying branch pipe, 35 is an emptying valve, 36 is a gas backwashing standby branch pipe, and 37 is a gas backwashing air inlet standby valve. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0031] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the embodiment of the present application provides a high-throughput filtering device, comprising a water inlet valve 1, a water inlet main pipe 2, a filter tank 3, a water distribution pipe 4, a water distribution branch pipe 5, a water distribution adjusting frame 6, a water distribution plate 7, a cross-flow filter pipe 8, a cross-flow filter valve 9 and a water outlet pipe 10.

[0032] The water inlet valve 1 is connected to the inlet end of the water inlet main pipe 2, the water inlet main pipe 2 passes through the filter tank 3 and is connected to the water distribution pipe 4; the water distribution pipe 4 is connected to a plurality of water distribution branch pipes 5 below; the outlet end of the water distribution branch pipe 5 is connected to the water distribution plate 7 through the water distribution adjusting frame 6; the cross-flow filter pipe 8 passes through the filter tank 3, the outlet end of the cross-flow filter pipe 8 is connected to the cross-flow filter valve 9, and the height of the connection between the cross-flow filter pipe 8 and the filter tank 3 is higher than the height of the water distribution plate 7; the water outlet pipe 10 is connected to the bottom of the filter tank 3.

[0033] The raw water from the water distribution branch pipe 5 impacts the water distribution plate 7, and the water distribution plate 7 changes the direction of the raw water from vertical downward to oblique upward, the pollutants carried by the oblique upward raw water are enriched in the upper space of the filter tank 3, and the pollutants are allowed to be discharged through the cross-flow filter pipe 8 via the cross-flow filter valve 9; the oblique upward raw water falls and is filtered by the filter layer inside the filter tank 3 and then discharged from the water outlet pipe 10.

[0034] In this embodiment, the raw water enters the water distribution pipe 4 from the water inlet valve 1 via the water inlet main pipe 2, enters the water distribution branch pipe 5 from the water distribution pipe 4, and then impacts the water distribution plate 7 after flowing out from the water distribution branch pipe 5. The distance between the water distribution plate 7 and the water distribution branch pipe 5 can be adjusted by the water distribution adjusting frame 6. When the raw water impacts the water distribution plate 7, it spreads around and changes the direction of the water flow from being perpendicular to the upper surface of the filter layer in the filter tank 3 to a water flow direction with a certain upward inclination, thereby enriching the pollutants in the upper space of the filter layer in the filter tank 3. At all times, part of the pollutants are discharged through the cross-flow filter pipe 8 via the cross-flow filter valve 9. The oblique upward raw water falls and is filtered by the filter layer to enter the water outlet pipe 10 and then is discharged.

[0035] In the embodiment, the upper end of the water distribution adjusting frame 6 is fixed by a mounting seat, and the position of the water distribution adjusting frame 6 can be adjusted by a nut. When the water inflow of raw water changes, the distance between the water distribution branch pipe 5 and the water distribution disc 7 can be controlled by adjusting the water distribution adjusting frame 6, so as to ensure that the water flow can achieve the surface sweeping effect.

[0036] The water flow changed by the water distribution disc 7 can flush the upper surface of the filter layer, and the surface layer pollution caused by the accumulation of pollutants on the upper surface of the filter layer can be greatly avoided. By changing the traditional mechanical filtration dead-end filtration concept to cross-flow filtration, when the filter is normally operated, a water flow is always discharged from the cross-flow filtration pipe 8 of the side wall, so as to avoid the surface layer pollution caused by too much pollutants. Since it is not easy to be polluted, the packing height of the filter material can be effectively controlled, and compared with the traditional mechanical filter, the packing height of the filter material can be reduced by more than 50%, which greatly reduces the packing cost and reduces the difficulty of backwashing.

[0037] The space of the upper part of the filter tank 3 is expanded due to the reduced packing height, and the space is used to enrich the pollutants swept away from the upper surface of the filter layer by the raw water. Since the water flow changed by the water distribution disc 7 retains a certain upward angle, the pollutants swept away from the upper surface of the filter layer cannot stay on the upper surface of the filter layer, but are constantly enriched in the upper space of the filter layer and enter the cross-flow filtration pipe 8 for discharge, so as to avoid the excessive enrichment of pollutants in the upper space.

[0038] Practice shows that the filtration capacity of the filter device can be improved by changing the direction of the raw water to flush the upper surface of the filter tank 3, and the filtration speed can be higher than 60 m / h. Compared with the same specification filter, under the premise of the same floor area, a single filter device of the present application can be equivalent to the treatment capacity of 5-6 traditional mechanical filters, and the backwashing cycle is similar.

[0039] In the embodiment, the exhaust pipe 11 and the exhaust valve 12 are further included; the air inlet end of the exhaust pipe 11 is connected to the top of the filter tank 3, and the exhaust valve 12 is connected to the air outlet end of the exhaust pipe 11.

[0040] Specifically, the exhaust valve 12 is opened during the operation of the device, and the accumulated gas in the filter tank 3 is discharged through the exhaust pipe 11 and the exhaust valve 12. When the exhaust pipe 11 can no longer discharge gas, the exhaust valve 12 is closed, and the filter device is normally operated.

[0041] In the embodiment, the air backwash inlet valve 13, the air backwash inlet pipeline 14, the air backwash main pipeline 15 and the air backwash branch pipeline 16 are further included. The air backwash inlet valve 13 is connected to the air inlet end of the air backwash inlet pipeline 14, and the air outlet end of the air backwash inlet pipeline 14 is communicated with the air backwash main pipeline 15 inside the filter tank 3. The air backwash main pipeline 15 and the air backwash branch pipeline 16 are fixed by the support beam. The air backwash branch pipeline 16 is provided with air outlets.

[0042] Specifically, the compressed air enters the filter tank 3 through the air backwash main pipeline 15 after entering the air backwash inlet pipeline 14 from the air backwash inlet valve 13. In order to ensure sufficient air backwash intensity and uniform air washing, a plurality of air backwash branch pipelines 16 are distributed on the air backwash main pipeline. A certain number of air outlets are opened on the air backwash branch pipeline 16. The air backwash main pipeline 15 and the air backwash branch pipeline 16 are located at the middle position of the filler and above the supporting layer and below the filter layer. The air backwash main pipeline 15 and the air backwash branch pipeline 16 are supported and fixed by the support beam, and are connected by bolts. The compressed air enters the filter tank 3 after entering the air backwash branch pipeline 16 from the air backwash main pipeline 15.

[0043] In the embodiment, the water outlet pipeline 10 is connected with the backwash water inlet pipeline 22 and the water outlet branch pipeline 23 through a three-way joint. The backwash water inlet pipeline 22 is connected with the backwash water inlet valve 24. The water outlet branch pipeline 23 is connected with the water outlet control valve 25 at the end. The water outlet branch pipeline 23 is connected with the water outlet sampling pipeline 26, which is provided with the water outlet sampling valve 27. The water outlet sampling pipeline 26 is connected with the water outlet pressure gauge 28. The water outlet pipeline 10 is connected with the emptying branch pipeline 34, the end of which is connected with the emptying valve 35. The water outlet pipeline 10 is connected with the air backwash standby branch pipeline 36, the end of which is connected with the air backwash inlet standby valve 37. In addition, the backwash drainage main pipeline 17, the first backwash drainage branch pipeline 18, the second backwash drainage branch pipeline 19, the backwash water outlet valve 20 and the backwash water outlet standby valve 21 are further included. The inlet end of the backwash drainage main pipeline 17 is connected to the top of the filter tank 3. The outlet end of the backwash drainage main pipeline 17, the inlet end of the first backwash drainage branch pipeline 18 and the inlet end of the second backwash drainage branch pipeline 19 are connected through a three-way joint. The backwash water outlet valve 20 is connected to the outlet end of the first backwash drainage branch pipeline 18, and the backwash water outlet standby valve 21 is connected to the outlet end of the second backwash drainage branch pipeline 19.

[0044] Specifically, the filtered water passes through the water outlet sampling pipeline 26 to the water outlet pressure gauge 28 through the water outlet pipeline 10. By observing the difference between the water outlet pressure gauge 28 and the water inlet pressure, as well as the change of the water inlet flow, when the difference between the water outlet pressure gauge 28 and the water inlet pressure increases or the water inlet flow decreases, it can be judged that the filter device needs to be backwashed. The water outlet sampling valve 27 can also be used for sampling analysis to determine whether the filter device needs to be backwashed.

[0045] Wherein, the backwash water enters the water outlet pipeline 10 from the backwash inlet valve 24, enters the filter tank 3 reversely, enters from the bottom of the filter tank 3, carries out water backwash on the filler, and the backwashed water enters the first backwash drainage branch pipe 18 or the second backwash drainage branch pipe 19 through the backwash outlet valve 20 or the backwash outlet standby valve 21 to be controlled to be discharged outside.

[0046] Wherein, the filter tank 3 is additionally provided with an emptying branch pipe 34 and an emptying valve 35 at the bottom of the water outlet pipeline 10, the accumulated water in the filter tank 3 can be emptied by opening the emptying valve 35, thereby serving as a prerequisite for the maintenance of the filter device. The filter tank 3 is additionally provided with a gas backwash standby branch pipe 36 and a gas backwash inlet standby valve 37 at the bottom of the water outlet pipeline 10, thereby having two gas backwash schemes. When a perforated plate type gas backwash scheme is adopted, compressed air enters the filter tank 3 from the gas backwash inlet standby valve 37 through the water outlet pipeline 10 to carry out gas backwash, and the backwash effects of the two gas backwash schemes are the same, and one of them can be selected at will according to the needs.

[0047] In the embodiment, the compressed air enters the filter tank 3 after entering the gas backwash branch pipe 16 from the gas backwash main pipe 15, and can also enter the first backwash drainage branch pipe 18 or the second backwash drainage branch pipe 19 through the backwash drainage main pipe 17, and be controlled to be discharged outside through the backwash outlet valve 20 or the backwash outlet standby valve 21.

[0048] In the embodiment, the filter tank 3 is provided with a manhole 29, the filter tank 3 is connected with a discharging pipeline 30, the discharging pipeline 30 is provided with a discharging blind flange 31 at the end thereof, and the filter tank 3 is connected with an upper sight glass 32 and a lower sight glass 33 at the side thereof.

[0049] Wherein, when the filter tank 3 needs to be loaded or unloaded, an operator can open the manhole 29 to load through the manhole 29, continuously fill the filler of different particle sizes from bottom to top in the filter tank 3, and perform gradation. The operator can dismount the discharging blind flange 31 to unload through the discharging pipeline 30, and move the filler to be replaced from the discharging pipeline 30 to the outside of the filter tank 3.

[0050] Wherein, the filter tank 3 is additionally provided with the upper sight glass 32 and the lower sight glass 33 outside, the clogging condition of the upper surface of the filter layer can be observed through the lower sight glass 33, and the water backwash effect can be observed through the upper sight glass 32.

[0051] The application also provides a high-treatment-capacity filtering method, which adopts the high-treatment-capacity filtering device in the above embodiment and comprises a cross-flow pollution discharge process, in which:

[0052] After the raw water from the water distribution branch pipe 5 impacts the water distribution plate 7, the water distribution plate 7 changes the direction of the raw water from vertically downward to inclined upward. The pollutants carried in the inclined upward raw water are concentrated in the upper space of the filter tank 3, and the pollutants are allowed to be discharged through the cross-flow filter pipe 8 via the cross-flow filter valve 9. After the inclined upward raw water falls down, it is filtered by the filter layer inside the filter tank 3 and then discharged from the outlet pipe 10.

[0053] During the filtering process:

[0054] Raw water enters the distribution pipe 4 through the inlet valve 1, then the main inlet pipe 2, and finally the branch pipe 5. After flowing out of the branch pipe 5, it impacts the distribution plate 7. The distance between the distribution plate 7 and the branch pipe 5 can be adjusted by the distribution adjustment bracket 6. When the raw water impacts the distribution plate 7, it spreads outwards, changing the direction of the water flow from perpendicular to the upper surface of the filter layer inside the filter tank 3 to a direction that maintains a certain upward inclination. This concentrates pollutants in the upper space of the filter layer inside the filter tank 3. Some pollutants are always discharged through the cross-flow filter pipe 8 and the cross-flow filter valve 9. The upward-sloping raw water falls through the filter layer and is filtered before entering the outlet pipe 10 for discharge.

[0055] During the washing process:

[0056] The flushing water enters the water distribution pipe 4 through the water inlet valve 1, then the water distribution branch pipe 5, and impacts the water distribution plate 7. After the flushing water passes through the filter layer, it enters the water outlet pipe 10 and is discharged through the water outlet valve.

[0057] During the air backwashing process:

[0058] Compressed air enters the backwash inlet pipe 14 through the backwash inlet valve 13 and then enters the filter tank 3 through the backwash main pipe 15. To ensure sufficient backwash intensity and uniform backwashing, multiple backwash branch pipes 16 are distributed on the backwash main pipe, each with a certain number of air outlets. The backwash main pipe 15 and the backwash branch pipes 16 are located in the middle of the packing material, above the support layer and below the filter layer. The backwash main pipe 15 and the backwash branch pipes 16 are supported and fixed by support beams and are fastened together with bolts. Compressed air enters the filter tank 3 after passing through the backwash main pipe 15 and the backwash branch pipes 16.

[0059] During the water backwashing process:

[0060] The filtered water passes through the outlet pipe 10 to the outlet sampling pipe 26 to the outlet pressure gauge 28. By observing the difference between the outlet pressure gauge 28 and the inlet pressure, and the change in the inlet flow rate, when the reading of the outlet pressure gauge 28 is greater than the difference between the inlet pressure or the inlet flow rate is reduced, it can be determined that the filter device needs to be backwashed. The sampling analysis can also be performed by the outlet sampling valve 27 to determine whether the filter device needs to be backwashed. The backwash water enters the outlet pipe 10 from the backwash inlet valve 24 and enters the filter tank 3 in the reverse direction from the bottom of the filter tank 3 to perform water backwashing on the filler. The backwashed water enters the first backwash drain branch pipe 18 or the second backwash drain branch pipe 19 through the backwash drain main pipe 17, and is controlled by the backwash outlet valve 20 or the backwash outlet standby valve 21 to be discharged.

[0061] In summary, the raw water from the distribution branch 5 impacts the water distribution tray 7, and the water distribution tray 7 changes the direction of the raw water from vertical downward to oblique upward. The pollutants carried in the oblique upward raw water are enriched in the upper space of the filter tank 3, and the pollutants are discharged through the cross-flow filter valve 9 via the cross-flow filter pipe 8. After the oblique upward raw water falls, it is filtered by the filter layer inside the filter tank 3 and is discharged from the water outlet pipe 10. The present application changes the dead-end filtration concept of the traditional mechanical filtration to the cross-flow filtration concept, and through the water distribution structure, the pollutants originally accumulated on the upper surface of the filter layer are transferred to the upper space of the filter layer, and then are discharged through the cross-flow filtration, so that the pollutants in the upper space of the filter layer are not excessively enriched. The water flow changed by the water distribution tray 7 can flush the upper surface of the filter layer, greatly avoiding the surface pollution caused by the accumulation of pollutants on the upper surface of the filter layer. By changing the concept of the dead-end filtration of the traditional mechanical filtration to the cross-flow filtration, when the filter is normally operated, a water flow is always discharged from the cross-flow filter pipe 8 of the side wall, avoiding the surface pollution caused by excessive pollutants. Because it is not easy to be polluted, the packing height of the filter material can be effectively controlled. Compared with the traditional mechanical filter, the packing height of the filter material can be reduced by more than 50%, greatly reducing the packing cost and the difficulty of backwashing. Because the packing height is reduced, the space in the upper part of the filter tank 3 is expanded, and this part of the space is used to enrich the pollutants swept from the upper surface of the filter layer by the raw water. Because the water flow changed by the water distribution tray 7 retains a certain upward inclination, the pollutants swept from the upper surface of the filter layer cannot stay on the upper surface of the filter layer, but are constantly enriched in the upper space of the filter layer and enter the cross-flow filter pipe 8 for discharge, avoiding excessive enrichment of the pollutants in the upper space. Practice shows that the filtration capacity of the filter device can be improved by changing the direction of the raw water to flush the upper surface of the filter tank 3. The highest filtration rate can be more than 60 m / h. Compared with the same specification filter, under the premise of the same floor area, a single filter device of the present application can equivalent to the treatment capacity of 5-6 traditional mechanical filters, and the backwashing cycle is similar.

[0062] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0063] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A high throughput filtration method characterized by, The high processing capacity filter device comprises a water inlet valve (1), a water inlet main pipe (2), a filter tank (3), a water distribution pipeline (4), a water distribution branch pipe (5), a water distribution adjusting frame (6), a water distribution plate (7), a cross-flow filter pipeline (8), a cross-flow filter valve (9) and a water outlet pipeline (10); the water inlet valve (1) is connected to the inlet end of the water inlet main pipe (2), the water inlet main pipe (2) passes through the filter tank (3) and is connected to the water distribution pipeline (4); a plurality of water distribution branch pipes (5) are connected below the water distribution pipeline (4); the outlet end of the water distribution branch pipe (5) is connected to the water distribution plate (7) through the water distribution adjusting frame (6); the cross-flow filter pipeline (8) is connected to the filter tank (3), the outlet end of the cross-flow filter pipeline (8) is connected to the cross-flow filter valve (9), and the height of the connection between the cross-flow filter pipeline (8) and the filter tank (3) is higher than the height of the water distribution plate (7); the water outlet pipeline (10) is connected to the bottom of the filter tank (3); During the filtration operation, raw water flows from the water inlet valve (1), enters the water distribution pipeline (4) through the water inlet main pipe (2), enters the water distribution branch pipe (5) through the water distribution pipeline (4), and then impacts the water distribution plate (7) after flowing out of the water distribution branch pipe (5); the distance between the water distribution plate (7) and the water distribution branch pipe (5) is adjusted by the water distribution adjusting frame (6); after the raw water impacts the water distribution plate (7), it spreads in all directions, changes the water flow direction from perpendicular to the upper surface of the filter layer in the filter tank (3) to a water flow direction with a certain upward inclination angle, and enriches pollutants in the upper space of the filter layer in the filter tank (3); part of the pollutants always pass through the cross-flow filter pipeline (8) and are discharged through the cross-flow filter valve (9); the inclined upward raw water falls down and then passes through the filter layer to enter the water outlet pipeline (10) and is discharged.

2. A high throughput filtration method according to claim 1, wherein, It also comprises an exhaust pipeline (11) and an exhaust valve (12); the air inlet end of the exhaust pipeline (11) is connected to the top of the filter tank (3), and the exhaust valve (12) is connected to the air outlet end of the exhaust pipeline (11).

3. A high throughput filtration method according to claim 2, wherein, It also comprises an air backwashing air inlet valve (13), an air backwashing air inlet pipeline (14), an air backwashing main pipe (15) and an air backwashing branch pipe (16); the air backwashing air inlet valve (13) is connected to the air inlet end of the air backwashing air inlet pipeline (14), the air outlet end of the air backwashing air inlet pipeline (14) is connected to the air backwashing main pipe (15) inside the filter tank (3); the air backwashing main pipe (15) and the air backwashing branch pipe (16) are fixed by a support beam; the air backwashing branch pipe (16) is provided with an air outlet hole; During the air backwashing process: compressed air enters the air backwashing inlet pipe (14) from the air backwashing inlet valve (13), then enters the filter tank (3) through the air backwashing main pipe (15), in order to ensure sufficient air backwashing intensity and uniform air washing, a plurality of air backwashing branch pipes (16) are distributed on the backwashing main pipe, the air backwashing main pipe (15) and the air backwashing branch pipe (16) are located in the middle of the filler, above the supporting layer and below the filter layer; compressed air enters the air backwashing branch pipe (16) from the air backwashing main pipe (15), and then enters the filter tank (3).

4. A high throughput filtration method according to claim 3, wherein, It also includes a backwashing drainage main pipe (17), a first backwashing drainage branch pipe (18), a second backwashing drainage branch pipe (19), a backwashing water outlet valve (20) and a backwashing water outlet standby valve (21); the inlet end of the backwashing drainage main pipe (17) is connected to the top of the filter tank (3), and the outlet end of the backwashing drainage main pipe (17), the inlet end of the first backwashing drainage branch pipe (18) and the inlet end of the second backwashing drainage branch pipe (19) are connected by a three-way joint; The backwashing water outlet valve (20) is connected to the outlet end of the first backwashing drainage branch pipe (18), and the backwashing water outlet standby valve (21) is connected to the outlet end of the second backwashing drainage branch pipe (19).

5. A high throughput filtration method according to claim 4, wherein, The water outlet pipe (10) is connected with a backwashing water inlet pipe (22) and a water outlet branch pipe (23) by a three-way joint; the backwashing water inlet pipe (22) is connected with a backwashing water inlet valve (24); the end of the water outlet branch pipe (23) is connected with a water outlet control valve (25).

6. A high throughput filtration method according to claim 5, wherein, The water outlet branch pipe (23) is connected with a water outlet sampling pipe (26), and the water outlet sampling pipe (26) is provided with a water outlet sampling valve (27); the water outlet sampling pipe (26) is connected with a water outlet pressure gauge (28); During the water backwashing process: filtered water passes through the water outlet pipe (10) and reaches the water outlet pressure gauge (28) through the water outlet sampling pipe (26), the difference between the water outlet pressure gauge (28) and the water inlet pressure, and the change of the water inlet flow rate are observed, when the difference between the water outlet pressure gauge (28) and the water inlet pressure increases or the water inlet flow rate decreases, it is determined that the filter device needs to be backwashed; or the water outlet sampling valve (27) is used for sampling analysis to determine whether the filter device needs to be backwashed; backwashing water enters the water outlet pipe (10) from the backwashing water inlet valve (24) and enters the filter tank (3) in the reverse direction, and then enters the filter tank (3) from the bottom of the filter tank (3) to perform water backwashing on the filler, and the backwashed water enters the first backwashing drainage branch pipe (18) or the second backwashing drainage branch pipe (19) through the backwashing drainage main pipe (17), and is controlled to be discharged through the backwashing water outlet valve (20) or the backwashing water outlet standby valve (21).

7. A high throughput filtration method according to claim 6, wherein, The filter tank (3) is provided with a manhole (29), and the filter tank (3) is connected with a discharging pipe (30), and the end of the discharging pipe (30) is provided with a discharging blind flange (31).

8. A high throughput filtration method according to claim 7, wherein, The side of the filter tank (3) is connected with an upper sight glass (32) and a lower sight glass (33).

9. A high throughput filtration method according to claim 8, wherein, The water outlet pipe (10) is connected with an emptying branch pipe (34), and the end of the emptying branch pipe (34) is connected with an emptying valve (35); The water outlet pipeline (10) is connected with a gas backwashing standby branch pipe (36), and the gas backwashing standby branch pipe (36) is connected with a gas backwashing gas inlet standby valve (37) at the end.

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