Filter

Abstract

The utility model relates to the technical field of sewage treatment, and provides a filter which comprises a tank body, a first filter plate and a second filter plate are arranged in the tank body, and the first filter plate and the second filter plate are arranged up and down at an interval; the space in the tank body is divided into a water distribution area, a filler area between the first filter plate and the second filter plate and a water collection area which are sequentially arranged from bottom to top; the filler area is suitable for providing a filling space for the fiber filter material; a water inlet and a water outlet are formed in the tank body, the water inlet is connected with the water distribution area, and the water outlet is connected with the water collection area. Through the arrangement, in the filtering process, the fiber filter material with small specific gravity floats on the upper layer of the filler area under the action of buoyancy to automatically form a filter layer, and the filter layer works in a compacted state under the action of water flow, so that the filtering precision is ensured; in addition, the part with large specific gravity of the asymmetric filter material is arranged at the lower part, and the part with small specific gravity is arranged at the upper part, so that a density crossed and continuous gradient density filter layer structure is formed, the deep filtering principle is met, and the filtering effect is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sewage treatment especially relates to a filter. BACKGROUND

[0002] The turbid circulating water system of metallurgy, petroleum, chemical industry and the like industry features high level of suspended matter, contains oil, oxidized mill scale and the like impurities, the turbid circulating water treatment structure such as stilling basin, chemical oil removal precipitator, rare earth disk machine, pressure integrated water production index still cannot satisfy the production line water quality requirement, and production accidents such as nozzle blockage often occur, and it is necessary to further reduce turbidity of turbid circulating water, oil level, and a first filtration equipment needs to be constructed before tower cooling in process.

[0003] The traditional early filter equipment selects the filter material as quartz sand sand filter or multi-medium filter, that is, increases the shell type activated carbon filter layer on the quartz sand filter layer to achieve better oil removal purpose, however, due to the low filtering speed, insufficient impact resistance and incomplete backwashing of the above filter, the fiber material such as fiber bundle and fiber spherical filter material is gradually used in the later period.

[0004] However, it is found in actual application that the fiber filter material with small specific gravity needs to be kept on the basis of certain pressure difference between inlet and outlet water, that is, the water treatment capacity needs to be large enough to form a filter layer, and the uneven distribution of asymmetric fiber filter material is not reasonable, which affects the filtering precision; sometimes the fiber filter material is fixedly filled, such as fiber bundle filter element and fiber ball integral filter bin, however, this design causes insufficient backwashing space and poor backwashing effect. INVENTION CONTENTS

[0005] The utility model provides a filter to solve the problem of poor filtering precision and backwashing effect in prior art, which has the advantages of high filtering precision and good backwashing effect.

[0006] The utility model provides a filter, which comprises:

[0007] A tank body is provided with a first filter plate and a second filter plate inside, and the first filter plate and the second filter plate are arranged in an upper and lower interval to separate the space inside the tank body into a water distribution area, a filler area between the first filter plate and the second filter plate, and a water collection area arranged in sequence from bottom to top; the filler area is suitable for providing a filling space for fiber filter material;

[0008] The tank body is provided with a water inlet and a water outlet, the water inlet is connected with the water distribution area, and the water outlet is connected with the water collection area.

[0009] According to the filter provided by the utility model, the filter further comprises a backwashing system for cleaning the fiber filter material.

[0010] The first filter plate and the second filter plate can be close to or away from each other to adjust the space size of the filler area.

[0011] According to the filter provided by the utility model, the second filter plate is located above the first filter plate and is fixedly connected with the tank body; the first filter plate can move close to or away from the second filter plate.

[0012] According to the filter provided by the utility model, the filter further comprises a driving member for driving the first filter plate to move;

[0013] The driving member is fixedly connected to the second filter plate and a driving end thereof is fixedly connected with the first filter plate.

[0014] According to the filter provided by the utility model, the backwashing system comprises:

[0015] The air washing module is provided with a plurality of air outlets, the air outlets are located in the filler area, and the plurality of air outlets are arranged in a circumferential direction around the filler area, and the air outlets are arranged at an angle with respect to the axial direction and the radial direction of the tank body.

[0016] According to the filter provided by the utility model, the backwashing system further comprises a backwashing module, the backwashing module comprises a backwashing water inlet pipe and a backwashing water outlet pipe; the backwashing water inlet pipe is connected with the water outlet through a backwashing water inlet valve, and the backwashing water outlet pipe is connected with the water inlet through a backwashing water outlet valve.

[0017] According to the filter provided by the utility model, the backwashing system further comprises a forward washing module, the forward washing module comprises a forward washing water inlet pipe and a forward washing water outlet pipe; the forward washing water inlet pipe is connected with the water inlet through a water inlet valve, and the forward washing water outlet pipe is connected with the water outlet through a forward washing water outlet valve.

[0018] According to the filter provided by the utility model, the tank body is provided with a safety valve interface at the top; the backwashing system further comprises a safety valve connected with the safety valve interface and an exhaust valve connected with the safety valve in parallel.

[0019] According to the filter provided by the utility model, the second filter plate is fully covered with water filtering caps;

[0020] The second filter plate comprises a central region and a peripheral region located at the periphery of the central region, and the water passing capacity of the water filtering caps in the central region is smaller than that of the water filtering caps in the peripheral region.

[0021] According to the filter provided by the utility model, a sealing ring is fixedly connected to the outer periphery of the first filter plate, and the sealing ring is elastically pressed against the inner wall of the tank body.

[0022] And / or, the edge of the first filter plate is provided with a plurality of limiting sliding blocks, a plurality of the limiting sliding blocks are uniformly arranged around the geometric center of the first filter plate, and are suitable for abutting against the inner wall of the tank body.

[0023] According to the filter provided by the utility model, the driving part comprises a cylinder,

[0024] The second filter plate is fixedly provided with a cylinder mounting seat, the cylinder body of the cylinder is fixedly connected with the cylinder mounting seat, and the piston rod of the cylinder is connected with the first filter plate.

[0025] According to the filter provided by the utility model, the air washing module comprises:

[0026] The air compressor air mother pipe is arranged around the outer periphery of the tank body.

[0027] A plurality of spray heads are arranged in a circumferential direction around the filler area, the inlet end of the spray head is connected with the air compressor air mother pipe, and the outlet end extends into the tank body and forms the air outlet.

[0028] According to the filter provided by the utility model, the spray head comprises a Laval spray head.

[0029] According to the filter provided by the utility model, the water distribution area is provided with a water distributor, and the water distributor comprises:

[0030] The mother pipe is arranged in the radial direction of the tank body, one end of the mother pipe is open, and the other end is closed, the open end of the mother pipe extends out of the tank body and forms the water inlet;

[0031] A plurality of branch pipes are connected with the mother pipe at one end and closed at the other end and extend in the radial direction of the tank body, the plurality of branch pipes cover the bottom area of the filler area, and the branch pipes are provided with water distribution holes.

[0032] According to the filter provided by the utility model, the water distribution hole faces the bottom of the tank body.

[0033] According to the filter provided by the utility model, the bottom of the first filter plate is fully covered with first reinforcing ribs, and the first reinforcing ribs are arranged in the radial direction of the first filter plate.

[0034] According to the filter provided by the utility model, the upper surface of the second filter plate is fully covered with second reinforcing ribs, and the second reinforcing ribs are arranged in the radial direction of the second filter plate.

[0035] According to the filter provided by the utility model, the intersection position of the second reinforcing rib is fixedly connected with a support column, and the other end of the support column is connected to the top of the tank body relative to the second filter plate.

[0036] According to the filter, the manhole cover is sealingly connected to the manhole on the top of the tank body.

[0037] The filter provided by the utility model, when filtering, the fiber filter material is filled in the filler area between the first filter plate and the second filter plate, when filtering, the pressurized sewage enters the water distribution area from the water inlet, and then enters the filler area from the water distribution area for filtering, and finally enters the water collecting area and is discharged from the water outlet, during the filtering process, the water body gradually fills the whole tank body, the fiber filter material with small specific gravity floats on the upper layer of the filler area under the action of buoyancy, so that a filter layer is automatically formed without using pressure difference, once filtering, the filter layer works in a compacted state under the action of water flow, the filtering precision is guaranteed, and due to the asymmetric characteristics of the single fiber filter material, the single filter material has the part with large specific gravity at the bottom and the part with small specific gravity at the top, so that the filter layer structure with cross density and continuous gradient density is formed, the deep filtering principle is met, the sewage interception depth is large, the sewage interception capacity is high, impurities are not accumulated on the surface layer, and the filtering flow rate is high. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0039] Figure 1 It is the structure schematic view of the filter in the filtering state provided by the utility model embodiment.

[0040] Figure 2 It is the structure schematic view of the filter in the backwashing state provided by the utility model embodiment.

[0041] Figure 3 It is the structure schematic view of the backwashing system provided by the utility model embodiment.

[0042] Figure 4 It is the structure schematic view of the air washing module provided by the utility model embodiment.

[0043] Figure 5 It is the structure schematic view of the nozzle and the tank body provided by the utility model embodiment.

[0044] Figure 6 It is the structure schematic view of the driving member and the first filter plate and the second filter plate provided by the utility model embodiment.

[0045] Figure 7 It is the front view of the first filter plate provided by the utility model embodiment.

[0046] Figure 8 is a top view of the first filter plate provided by the embodiment of the utility model.

[0047] Figure 9 is a structure schematic view of the sealing ring cooperating with the first filter plate provided by the embodiment of the utility model.

[0048] Figure 10 is a top view of the second filter plate provided by the embodiment of the utility model.

[0049] Figure 11 is a structure schematic view of the support column cooperating with the second reinforcing rib provided by the embodiment of the utility model.

[0050] Figure 12 is a structure schematic view of the support column cooperating with the second reinforcing rib and the tank provided by the embodiment of the utility model.

[0051] Figure 13 is a structure schematic view of the filter cap cooperating with the second filter plate provided by the embodiment of the utility model.

[0052] Figure 14 is one of structure schematic views of the water distributor in the water distribution area provided by the embodiment of the utility model.

[0053] Figure 15 is another of structure schematic views of the water distributor in the water distribution area provided by the embodiment of the utility model.

[0054] Reference signs:

[0055] 10, tank; 100, water outlet; 101, manhole; 102, safety valve interface; 11, water distribution area; 12, filler area; 13, water collection area; 14, water production pipe; 15, water production valve; 16, water inlet pipe; 17, water inlet valve; 18, safety valve; 19, exhaust valve; 20, first filter plate; 200, connecting hole; 21, sealing ring; 22, connecting bolt; 23, limiting sliding block; 24, first reinforcing rib; 30, second filter plate; 300, air cylinder mounting seat; 31, second reinforcing rib; 32, support column; 33, filter cap; 40, backwashing system; 41, backwashing module; 410, backwashing water inlet pipe; 411, backwashing drain pipe; 412, backwashing water inlet valve; 413, backwashing drain valve; 42, forward washing module; 421, forward washing drain pipe; 422, forward washing drain valve; 43, alkali washing module; 430, alkali washing pipeline; 431, alkali washing valve; 44, air washing module; 440, air compression air main pipe; 441, spray head; 442, air backwashing valve; 50, driving member; 60, water distributor; 600, main pipe; 601, branch pipe; 602, water distribution hole. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model will be described clearly and completely in combination with the drawings in the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0057] In order to better understand the filter provided by the utility model, the application background thereof is introduced first. The turbid circulating water in the metallurgical, petroleum, chemical and other industries has the characteristics of high suspended solids level, containing oil, oxidized scale and other impurities. After being treated by the water treatment structure, it still cannot meet the water quality requirements of the production line, and further filtration is needed before the water is cooled in the upper tower. The filter material selected by the traditional early filter equipment is a sand filter or a multi-medium filter with quartz sand. However, due to the limitations of filtration speed, impact resistance and backwashing effect, fiber material such as fiber bundle and fiber spherical filter material is gradually selected in the later period.

[0058] However, it is found in actual application that the traditional filter equipment adopts the treatment process of top filling water and tank bottom drainage. The quartz sand filter with large specific gravity can be automatically layered according to the grading principle, but the fiber filter material with small specific gravity needs to be kept at a certain pressure difference between the inlet and outlet water, that is, the water treatment capacity needs to be large enough to form a filter layer, and the distribution of the fiber filter material is not reasonable, which affects the filtration precision. Sometimes the fiber filter material is fixedly filled, such as fiber bundle filter element and fiber ball integral filter bin. However, this design causes the problems of insufficient backwashing space and poor backwashing effect.

[0059] Based on the above problems and findings, the utility model provides a filter with the advantages of high filtration precision and good backwashing effect.

[0060] The filter of the utility model will be described below. Figures 1-15

[0061] Refer to Figure 1 and Figure 2 A filter, comprising a tank body 10, a first filter plate 20 and a second filter plate 30 are arranged in the tank body 10, wherein the first filter plate 20 and the second filter plate 30 are arranged in an upper and lower interval, so as to separate the space in the tank body 10 into a water distribution area 11, a filler area 12 between the first filter plate 20 and the second filter plate 30, and a water collection area 13 arranged in sequence from bottom to top; the filler area 12 is suitable for providing a filling space for fiber filter material; the tank body 10 is provided with a water inlet and a water outlet 100, the water inlet is connected with the water distribution area 11, and the water outlet 100 is connected with the water collection area 13.

[0062] ​In actual work, the fiber filter material is filled in the filler area 12 between the first filter plate 20 and the second filter plate 30, during filtration, the pressurized sewage enters the water distribution area 11 from the water inlet, and then enters the filler area 12 from the water distribution area 11 for filtration, and finally enters the water collecting area 13 and is discharged from the water outlet 100, during the filtration process, the water body gradually fills the entire tank 10, and the fiber filter material with a small specific gravity floats on the upper layer of the filler area 12 under the action of the buoyancy, so that a filter layer is automatically formed without using a pressure difference, once filtration is performed, the filter layer works in a compacted state under the action of the water flow, the filtration precision is ensured, and due to the asymmetric characteristics of the single fiber filter material, the single filter material has a part with a large specific gravity at the bottom and a part with a small specific gravity at the top, so that a filter layer structure with a continuous gradient density and a dense and sparse interlaced structure is formed, the deep filtration principle is met, the sewage interception depth is large, the sewage interception capacity is high, impurities are not accumulated on the surface layer, and the filtration flow rate is high.

[0063] In some optional embodiments, the shape, material and size specifications and other parameters of the tank 10 can be flexibly designed according to actual needs, for example, sewage treatment capacity, water pressure strength and the like, as long as the required treatment capacity and pressure bearing capacity are met.

[0064] In addition, the fiber filter material in the embodiment of the utility model adopts asymmetric fiber filter material, for example, a general comet-shaped fiber filter material and the like, and filter materials for some special purposes (for example, filter materials with a denitrification function, suitable for high-turbidity water, oil-containing wastewater and the like) can be customized according to process requirements, which are not enumerated and described one by one in the embodiment of the utility model. The size specifications and packing density of the fiber filter material can be selected and designed according to the actual required water quality, which is not specifically limited in the embodiment of the utility model.

[0065] In an embodiment of the utility model, taking a vertical columnar tank 10 as an example, the upper and lower directions are the axial direction of the tank 10, and the first filter plate 20 and the second filter plate 30 are arranged along the axial direction of the tank 10, so as to divide the space in the tank 10 into the water distribution area 11, the filler area 12 and the water collecting area 13 arranged in sequence along the axial direction.

[0066] Specifically, the water distribution area 11 is formed in the region of the lower head of the tank 10, the water inlet is arranged on the lower head of the tank 10, the water collecting area 13 is formed in the region of the upper head of the tank 10, and the water outlet 100 is arranged on the upper head of the tank 10. The upper head of the tank 10 is also provided with a manhole 101, the manhole 101 is sealed and connected with a manhole cover through a flange, and the manhole 101 facilitates maintenance of various components in the tank 10 by workers.

[0067] In an embodiment of the utility model, referring to Figures 3-5The filter further comprises a backwashing system 40, which is used to backwash the fiber filler in the filler area 12 after a period of use, so as to ensure the filtering efficiency.

[0068] The backwashing system 40 can comprise a backwashing module 41 for backwashing the fiber filler by using water, or a wind washing module 44 for stirring the fiber filler in the filler area 12 by using wind force, so that the impurities are separated from the fiber filler under the centrifugal force. The backwashing system 40 can also comprise both the backwashing module 41 and the wind washing module 44, so that the backwashing effect is improved by using the combined backwashing of water and wind. In the embodiment of the utility model, in order to improve the backwashing effect, the backwashing system 40 comprises both the backwashing module 41 and the wind washing module 44.

[0069] The backwashing module 41 is suitable for supplying backwashing water from above the filler area 12. The backwashing water is supplied from above, which is beneficial to the washing and separation of the dirt, and the sewage containing the dirt after the washing and separation can be naturally discharged under the action of gravity, so as to improve the backwashing effect.

[0070] Specifically, the backwashing module 41 comprises a backwashing water inlet pipe 410 and a backwashing water outlet pipe 411. The backwashing water inlet pipe 410 is connected with the water outlet 100 through a backwashing water inlet valve 412, and the backwashing water outlet pipe is connected with the water inlet through a backwashing water outlet valve 413. When backwashing, the backwashing water outlet valve 413 is opened, the backwashing module 41 supplies backwashing water to the filler area 12 through the water outlet 100, and the sewage after the backwashing can be discharged from the water inlet through the backwashing water outlet pipe 411.

[0071] In order to facilitate the control, the water outlet 100 of the tank 10 is connected with a water production pipe 14 through a water production valve 15, and the water inlet of the tank 10 is connected with a water inlet pipe 16 through a water inlet valve 17. During the filtering stage, the water inlet valve 17 and the water production valve 15 are opened, and the backwashing water inlet valve 412 and the backwashing water outlet valve 413 are closed. The sewage enters from the water inlet and is discharged from the water outlet 100 after the filtering. During the backwashing stage, the water inlet valve 17 and the water production valve 15 are closed, and the backwashing water inlet valve 412 and the backwashing water outlet valve 413 are opened. The backwashing water enters the tank 10 through the water outlet 100 to backwash the fiber filler, and the backwashing water is discharged from the water inlet through the backwashing water outlet pipe 411.

[0072] In order to further improve the backwashing effect, the backwashing system 40 further comprises a forward washing module 42 in an embodiment of the utility model. The forward washing module 42 is suitable for supplying cleaning water from below the filler area 12. After the backwashing, the forward washing module 42 is used for forward washing, so that the washing and separation effect of the dirt is further improved.

[0073] Specifically, the forward washing module 42 comprises a forward washing water inlet pipe and a forward washing water outlet pipe 421; wherein the forward washing water inlet pipe is connected with the water inlet through a forward washing water inlet valve, and the forward washing water outlet pipe 421 is connected with the water outlet 100 through a forward washing water outlet valve 422. After the backwashing is completed, the backwashing water inlet valve 412 and the backwashing water outlet valve 413 are closed, and the forward washing water inlet valve and the forward washing water outlet valve 422 are opened, so that the forward washing water enters the fiber filler in the filler area 12 for cleaning, and the cleaned water is discharged through the water outlet 100 and the forward washing water outlet pipe 421.

[0074] Specifically, during forward washing, the forward washing water can be provided by the water inlet pipe 16, that is, the water inlet pipe 16 and the forward washing water inlet pipe adopt the same pipe and are controlled by the water inlet valve 17.

[0075] In an embodiment of the utility model, the backwashing system 40 further comprises an alkali washing module 43; the alkali washing module 43 comprises an alkali washing pipe 430, and the alkali washing pipe 430 is connected with the water inlet through an alkali washing valve 431; after the filter runs for a period of time, the alkali washing pipe 430 is used to provide alkali liquor to alkali wash the tank body 10 and each component in the tank body 10, so as to ensure the filtering efficiency.

[0076] In an embodiment of the utility model, the air washing module 44 is provided with a plurality of air outlets, the air outlets are located in the filler area 12, and the plurality of air outlets are arranged in a circumferential direction around the filler area 12, and the air outlets are arranged at an angle with the axial direction and the radial direction of the tank body 10. In this way, during the air washing stage, the air washing module 44 passes air into the filler area 12 through the air outlets, the water in the filler area 12 is circularly moved under the stirring of the air pressure to rub and wash the fiber filter material, and at the same time, a huge centrifugal force is formed, so that the impurities on the fiber filter material are shaken off under the centrifugal force, and the backwashing effect is greatly improved.

[0077] Specifically, the air washing module 44 comprises an air compressor air main pipe 440 and a plurality of spray heads 441; wherein the air compressor air main pipe 440 is arranged around the outer periphery of the tank body 10 and is used to supply air pressure; the plurality of spray heads 441 are arranged in a circumferential direction around the filler area 12, the inlet end of the spray head 441 is connected with the air compressor air main pipe 440, and the outlet end extends into the tank body 10 to form the above-mentioned air outlet. During the air washing stage, the air compressor air main pipe 440 is used to deliver air pressure to the plurality of spray heads 441, and the air pressure is sprayed into the filler area 12 by the spray heads 441, so that the water in the filler area 12 is circularly moved under the action of the air pressure to rub and wash the fiber filter material and promote the impurities to fall off.

[0078] The specific type, arrangement number and arrangement angle of the spray head 441 can be selected according to actual needs to achieve the required stirring effect.

[0079] As a specific embodiment of the utility model, the spray head 441 selects a Laval spray head, and the spray head 441 is installed at an angle of 45 degrees in the radial direction and the axial direction of the tank body 10 to achieve the best stirring effect.

[0080] Specifically, the air washing module 44 can be controlled through the air backwashing valve 442.

[0081] In order to ensure safety, in an embodiment of the utility model, a safety valve interface 102 is arranged on the top of the tank body 10, and a safety valve 18 is connected to the safety valve interface 102; when overpressure occurs in the filter during operation, the safety valve 18 can be opened to release pressure, thereby ensuring the safety of equipment operation.

[0082] In an embodiment of the utility model, the filter further comprises an exhaust valve 19, and the exhaust valve 19 is connected in parallel with the safety valve 18; during the backwashing stage, the exhaust valve 19 is always in an open state, and the tank body 10 can release pressure through the exhaust valve 19, thereby avoiding overpressure operation of the tank body 10 and further ensuring safety.

[0083] In order to increase the backwashing space during the backwashing stage and improve the backwashing effect, with reference to Figure 1 and Figure 2 In an embodiment of the utility model, the first filter plate 20 and the second filter plate 30 can approach or move away from each other to adjust the space size of the filler area 12. In this way, during the backwashing stage, the space of the filler area 12 can be increased by moving the first filter plate 20 and the second filter plate 30 away from each other, and the packing density of the fiber filler can be reduced, so that the fiber filler can be fully washed under the combined action of air and water, and the backwashing effect is better. After backwashing is completed, the first filter plate 20 and the second filter plate 30 approach each other, so that the fiber filler meets the required packing density, thereby ensuring the filtering effect.

[0084] Specifically, the second filter plate 30 is arranged above the first filter plate 20 and is fixedly connected with the tank body 10, and the first filter plate 20 can move towards or away from the second filter plate 30.

[0085] In order to more conveniently adjust the space of the packing area, the filter further comprises a driving member 50 for driving the first filter plate 20 to move towards or away from the second filter plate 30; the driving member 50 is fixedly connected to the second filter plate 30 and the driving end is fixedly connected with the first filter plate 20. During the backwashing stage, the driving member 50 drives the first filter plate 20 to move away from the second filter plate 30 to increase the space of the filler area 12, and after backwashing is completed, the driving member 50 drives the first filter plate 20 to move towards the second filter plate 30 to reduce the space of the filler area 12 to ensure the packing density of the fiber filler.

[0086] According to different actual needs, the driving member 50 can be selected as different structures or forms, for example, can adopt air cylinder, electric push rod, motor-driven screw rod and screw nut and the like linear driving elements, and the specific selection can be carried out according to actual needs.

[0087] As a specific embodiment of the utility model, the driving member 50 adopts the air cylinder, and the air cylinder is provided with air pressure by penetrating the air pressure pipe of the tank wall of the tank body 10.

[0088] More specifically, referring to Figure 6 , the center position of the second filter plate 30 is fixedly provided with the air cylinder mounting seat 300, the bottom end of the air cylinder cylinder body is fixedly connected with the air cylinder mounting seat 300 through bolts, the center position of the first filter plate 20 is provided with the connecting hole 200, and the end of the air cylinder piston rod is a rigid universal joint and is connected with the connecting hole 200.

[0089] It can be understood that the air cylinder and the first filter plate 20 and the second filter plate 30 include but are not limited to the connection modes listed above, and other connection modes can be used as long as the air cylinder can be connected with the first filter plate 20 and the second filter plate 30.

[0090] Specifically, the filter provided by the utility model embodiment is operated by the following steps:

[0091] In the backwashing stage, the water inlet valve 17 and the water production valve 15 are closed first, the driving member 50 drives the first filter plate 20 to move away from the second filter plate 30 to increase the space of the filler area 12, then the backwashing water inlet valve 412 and the backwashing water outlet valve 413 are opened, then the exhaust valve 19 is opened, the air washing module 44 is opened, and the filler in the filler area 12 is subjected to air-water combined backwashing, the air-water combined backwashing time is generally 3-5 minutes, the air washing module 44 is closed, the backwashing is closed after 1 minute, the backwashing water pump is closed, the backwashing water inlet valve 412 and the backwashing water outlet valve 413 are closed, the water inlet valve 17 and the normal washing water outlet valve 422 are opened for 1 minute of normal washing, then the normal washing water outlet valve 422 is closed, the water production valve 15 is opened, the driving member 50 drives the first filter plate 20 to move close to the second filter plate 30 to reset, the exhaust valve 19 is closed, and then normal filtering operation can be carried out.

[0092] The specific structure of the first filter plate 20 and the second filter plate 30 will be described below with reference to the drawings.

[0093] Referring to Figures 7-9 , the shape of the first filter plate 20 is matched with the cross-sectional shape of the tank body 10, and the specific structure and material thereof can be selected according to actual needs, for example, the first filter plate 20 can select a stainless steel wedge-shaped screen, or a stainless steel perforated plate with a PP material screen in the middle, and the specific selection is not limited in the utility model embodiment.

[0094] Since the first filter plate 20 is a movable filter plate, a certain fitting gap needs to be left between the outer periphery of the first filter plate 20 and the inner wall of the tank body 10, and during the backwashing stage, the fiber filter material may enter the water distribution area 11 from this gap under the action of water pressure and air pressure to cause the backwashing material running problem.

[0095] To solve the above problems, in an embodiment of the utility model, a sealing ring 21 is fixedly connected to the outer periphery of the first filter plate 20, and the sealing ring 21 is used to achieve sealing by being elastically pressed against the inner wall of the tank body 10.

[0096] In an embodiment of the utility model, the sealing ring 21 can be fixed to the outer periphery of the first filter plate 20 through a connecting bolt 22. The specific material of the sealing ring 21 can be selected according to actual requirements. In this embodiment, the sealing ring 21 is made of vulcanized rubber.

[0097] To ensure the stability of the sliding of the first filter plate 20 and avoid the tilting of the filter plate during movement, in an embodiment of the utility model, a plurality of limiting sliding blocks 23 are protruded at the edge of the first filter plate 20, the plurality of limiting sliding blocks 23 are evenly arranged around the geometric center of the first filter plate 20, and are adapted to abut against the inner wall of the tank body 10. During the sliding of the first filter plate 20, the limiting sliding blocks 23 can abut against the inner wall of the tank body 10 to limit and constrain the first filter plate 20, so that the first filter plate 20 can only slide along the axial direction of the tank body 10 and cannot be tilted, which is beneficial to improving the smoothness and stability of the sliding of the first filter plate 20.

[0098] The specific number of the limiting sliding blocks 23 and the connection mode of the limiting sliding blocks 23 with the first filter plate 20 can be selected according to actual requirements. As a specific embodiment of the utility model, the limiting sliding blocks 23 are evenly arranged around the geometric center of the first filter plate 20, and the limiting sliding blocks 23 are fixedly connected to the upper surface of the first filter plate 20 in a welded manner.

[0099] To ensure the structural strength of the first filter plate 20, in an embodiment of the utility model, a first reinforcing rib 24 is fully welded on the first filter plate 20. Specifically, the first reinforcing rib 24 is welded to the bottom surface of the first filter plate 20 and is arranged in a horizontal and vertical cross manner along the radial direction of the first filter plate 20.

[0100] With reference to Figures 10-12 In an embodiment of the utility model, the shape of the second filter plate 30 is adapted to the cross-sectional shape of the tank body 10 and is fixedly connected to the tank body 10. The specific structure, material and specific connection mode of the second filter plate 30 with the tank body 10 can be selected according to actual requirements. In this embodiment, in order to ensure the structural strength of the second filter plate 30, the second filter plate 30 is made of a Q235 steel plate with a thickness of 12 mm, and the outer periphery of the second filter plate 30 is extended to the outside of the tank to be welded, that is, the upper head and the lower straight section of the tank body 10 are welded on the second filter plate 30

[0101] In one embodiment of the utility model, the upper surface of the second filter plate 30 is fully covered with second reinforcing ribs 31 to further improve the structural strength of the second filter plate 30. Specifically, the second reinforcing ribs 31 are arranged horizontally and vertically along the radial direction of the second filter plate 30, and the intersections of the second reinforcing ribs 31 are fully welded.

[0102] In one embodiment of the utility model, the upper surface of the second filter plate 30 is fixedly connected with a support column 32, one end of the support column 32 is fixedly connected with the second filter plate 30, and the other end is fixedly connected with the upper head of the tank body 10.

[0103] Specifically, the support column 32 is welded at the intersection of the second reinforcing ribs 31, and the other end of the support column 32 relative to the second filter plate 30 is fixedly connected with the upper head of the tank body 10 by welding.

[0104] Through the support column 32, the structural strength of the second filter plate 30 can be further improved, so as to ensure that the second filter plate 30 does not deform under the filtering pressure difference.

[0105] In one embodiment of the utility model, referring to Figure 12 and Figure 13 , the second filter plate 30 is fully covered with water filter caps 33, and the uniformity of the water flow velocity of the water section can be ensured through the water filter caps 33, thereby ensuring the uniform distribution of the fiber filter material.

[0106] Specifically, the first filter plate 20 includes a central region and a peripheral region located outside the central region, and the water filter caps 33 have two specifications, and the water flow of the water filter caps 33 of the central region is less than that of the water filter caps 33 of the peripheral region. By arranging in this way, the water flow of the edge region can be compensated, so as to achieve more uniform water distribution and improve the uniformity of the distribution of the fiber filter material.

[0107] It can be understood that the specific areas of the central region and the edge region, the specific specifications and arrangement numbers of the water filter caps 33, and other parameters can be flexibly designed according to the actual water flow demand, and the embodiments of the utility model are not limited specifically.

[0108] It should be pointed out that the specific types and structures of the water filter caps 33 can refer to the prior art, and the embodiments of the utility model are not described in detail.

[0109] In order to ensure uniform water distribution during filtration, in one embodiment of the utility model, referring to Figure 14 and Figure 15The water distributor 60 is arranged in the water distribution area 11, and the water distributor 60 comprises a mother pipe 600 and a plurality of branch pipes 601; wherein the mother pipe 600 is arranged in the water distribution area 11 along the radial direction of the tank body 10, one end of the mother pipe 600 is open and the other end is closed, the open end of the mother pipe 600 penetrates the tank body 10 to form the water inlet mentioned above; one end of the branch pipe 601 is connected with the mother pipe 600, and the other end is closed and extends along the radial direction of the tank body 10, the branch pipe 601 is arranged at an angle with the mother pipe 600, the plurality of branch pipes 601 cover the bottom area of the filler area 12, and the water distribution holes 602 are arranged on the branch pipes 601. During filtration, sewage is distributed into the plurality of branch pipes 601 through the mother pipe 600, and the plurality of branch pipes 601 covering the bottom of the filler area 12 can uniformly distribute the sewage to the filler area 12, so as to ensure the filtration efficiency.

[0110] Specifically, the water distribution holes 602 are arranged at the bottom of the branch pipes 601, that is, towards the bottom of the tank body 10, and the sewage flows out through the water distribution holes 602 and impacts the tank body 10, and then flows upwards after refraction of the tank body 10, which is beneficial to further improve the uniformity of water distribution.

[0111] In order to ensure the stability of the connection of the water distributor 60 at the bottom of the tank body 10, the closed end of the mother pipe 600 is welded and fixed with the tank body 10, and the tail end of the branch pipe 601 is also fixedly connected with the tank body 10 in a welded manner.

[0112] It can be understood that, without being in contradiction with each other, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples.

[0113] Through the filter provided by the embodiment of the utility model, the fiber filter material is filled in the filler area 12 between the first filter plate 20 and the second filter plate 30 during filtration, during filtration, the sewage under pressure enters the water distribution area 11 from the water inlet, and then enters the filler area 12 from the water distribution area 11 for filtration, and finally enters the water collecting area 13 and is discharged from the water outlet 100, during the filtration process, the water body gradually fills the entire tank body 10, and the fiber filter material with small specific gravity floats on the upper layer of the filler area 12 under the action of the buoyancy, so that a filter layer is automatically formed without using pressure difference, once filtration is performed, the filter layer works in a compacted state under the action of the water flow, the filtration precision is ensured, and due to the asymmetric characteristics of the single fiber filter material, the single filter material has a part with large specific gravity at the bottom and a part with small specific gravity at the top, so that a filter layer structure with sparse and dense interlacing and continuous gradient density is formed, which meets the deep filtration principle, the sewage interception depth is large, the sewage interception capacity is high, impurities are not accumulated on the surface layer, and the filtration flow rate is high.

[0114] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still be modified to the technical solutions recorded in the foregoing examples, or part of the technical features are replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A filter, characterized by, The filter comprises: a tank body (10) in which a first filter plate (20) and a second filter plate (30) are arranged in a spaced-apart manner, so as to divide the space in the tank body (10) into a water distribution area (11), a filler area (12) between the first filter plate (20) and the second filter plate (30), and a water collection area (13) arranged in sequence from bottom to top; the filler area (12) is suitable for providing a filling space for fiber filter material. The tank body (10) is provided with a water inlet and a water outlet (100), the water inlet is connected with the water distribution area (11), and the water outlet (100) is connected with the water collection area (13).

2. The filter of claim 1, wherein, The filter further comprises a backwashing system (40) for cleaning the fiber filter material. The first filter plate (20) and the second filter plate (30) can approach or move away from each other, so as to adjust the space size of the filler area (12).

3. The filter of claim 2, wherein, The second filter plate (30) is located above the first filter plate (20) and is fixedly connected with the tank body (10); the first filter plate (20) can move towards or away from the second filter plate (30).

4. The filter of claim 3, wherein, Further comprising a driving member (50) for driving the first filter plate (20) to move; The driving member (50) is fixedly connected with the second filter plate (30) and the driving end is fixedly connected with the first filter plate (20).

5. The filter of claim 2, wherein, The backwashing system (40) comprises: an air washing module (44) provided with a plurality of air outlets, the air outlets are located in the filler area (12), and a plurality of the air outlets are arranged in a circumferential direction around the filler area (12), and the air outlets are arranged at an angle with respect to the axial direction and the radial direction of the tank body (10).

6. The filter of claim 5, wherein, The backwashing system (40) further comprises a backwashing module (41), the backwashing module (41) comprises a backwashing water inlet pipe (410) and a backwashing water outlet pipe (411); the backwashing water inlet pipe (410) is connected with the water outlet (100) through a backwashing water inlet valve (412), and the backwashing water outlet pipe (411) is connected with the water inlet through a backwashing water outlet valve (413).

7. The filter of claim 6, wherein, The backwashing system (40) further comprises a forward washing module (42), the forward washing module (42) comprises a forward washing water inlet pipe and a forward washing water outlet pipe (421); the forward washing water inlet pipe is connected with the water inlet through a forward washing water inlet valve, and the forward washing water outlet pipe (421) is connected with the water outlet (100) through a forward washing water outlet valve (422).

8. The filter of claim 7, wherein, The tank body (10) is provided with a safety valve interface (102) at the top; the filter further comprises a safety valve (18) connected with the safety valve interface (102) and an exhaust valve (19) connected in parallel with the safety valve (18).

9. The filter according to any one of claims 1 to 8, characterized in that The second filter plate (30) is fully covered with water filter caps (33); The second filter plate (30) comprises a central region and a peripheral region located at the periphery of the central region, and the water passing capacity of the water filter caps (33) in the central region is less than that of the water filter caps (33) in the peripheral region.

10. The filter of claim 2, wherein, The outer periphery of the first filter plate (20) is fixedly connected with a sealing ring (21), and the sealing ring (21) is elastically pressed against the inner wall of the tank body (10); And / or, a plurality of limiting sliding blocks (23) are protruded at the edge of the first filter plate (20), and the plurality of limiting sliding blocks (23) are uniformly arranged around the geometric center of the first filter plate (20), and are suitable for abutting against the inner wall of the tank body (10).

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