Filtration equipment

A technology of filtration equipment and filtration materials, applied in filtration and separation, membrane filters, gravity filters, etc., can solve problems such as small effective filtration surface area, and achieve the effect of improving work efficiency, reducing time, and reducing the number of backwash operations

Inactive Publication Date: 2004-02-11
永冈忠义
3 Cites 1 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0005] More importantly, prior art filter devices have a relatively small effective filter ...
View more

Method used

[0089] The backwash pipe 63 has a plurality of backwash water injection holes 73 at predetermined intervals in its axial direction. In this embodiment, as can be clearly seen from FIG. 12, four sets of vertically arranged spray holes 73a, 73b, 73c and 73d are ...
View more

Abstract

A filtering device includes a container having an inlet for introducing liquid to be treated, an annular multi-layered prepacked screen assembly provided in the container and having an outlet for treated liquid. The screen assembly includes three or more cylindrical screens having different diameters and bieng coaxially disposed in the container with their axes extending vertically in the container. An anulus is formed between the respective cylindrical screens. Two or more different filter materials performing different filtering functions are filled one in each of the annuluses between the cylindrical screens.

Application Domain

Sedimentation separationMembrane filters +5

Technology Topic

EngineeringFilter material +3

Image

  • Filtration equipment
  • Filtration equipment
  • Filtration equipment

Examples

  • Experimental program(1)

Example Embodiment

[0049] Figure 1-5 An embodiment of the filtration device manufactured according to the present invention is described.
[0050] figure 1 The structure of the filtering device 1 is schematically described. The container 2 has a box-like structure, with a treatment liquid inlet 3 at the lower part of one side, and a discharge port 4 at the bottom. The discharge port 4 is normally closed, and is opened when the solid foreign particles accumulated on the bottom of the container 2 are to be removed. The upper part of the container 2 is manufactured as a treatment liquid discharge pipe 5 having an outlet 6.
[0051] One or more pre-filled ring-shaped multi-layer screen components (there are five screen components in the illustrated solution) are provided in the container 2, and the components are identified by reference numeral 7. Each screen assembly 7 has an outlet 8 in the upper part thereof, and the outlet 8 communicates with the treatment liquid discharge pipe 5.
[0052] figure 2 It is an example of a pre-filled ring-shaped multilayer screen assembly 7 in which no filter material is filled in the annular space between the cylindrical screens. in figure 2 In order to better understand the screen assembly, a part of each cylindrical screen constituting the screen assembly 7 is omitted. image 3 It is a cross-sectional view of the screen assembly with no filter material filled therein.
[0053] The pre-filled annular multi-layer screen assembly 7 includes three layers of cylindrical screens with different diameters, namely, the innermost cylindrical screen 9 with the smallest diameter, and the middle cylindrical screen with a diameter larger than the innermost screen 9 The net 10 and the outermost cylindrical screen 11 having the largest diameter. The cylindrical screens 9, 10, and 11 are coaxially arranged in the container 2, and they extend vertically in the container 2 along its axial direction. An annular gap 12 is formed between the innermost cylindrical screen 9 and the middle cylindrical screen 10, and an annular gap 13 is formed between the middle cylindrical screen 10 and the outermost cylindrical screen 11. A disc-shaped bottom plate (sealing plate) 14 is fixedly connected to the bottom of each of the cylindrical screens 9, 10 and 11, and the top of the cylindrical screens 10 and 11 is sealed with a disc-shaped top plate 15. The screen assembly 7 is installed on the bottom surface of the container 2 and stands vertically on the bottom surface. The cylindrical screens 9, 10, and 11 have sealing wall portions 9b, 10b, and 11b extending from the screen portions 9a, 10a, and 11a of the cylindrical screens 9, 10, and 11 so as to be between the sealed wall portions 9b and 10b. An annular chamber 16 is formed between, and an annular chamber 17 is formed between the sealing wall portions 10b and 11b. The annular chambers 16 and 17 are the continuation of the annular spaces 12 and 13 and are located above the annular spaces 12 and 13. The sealing wall portion 9b of the innermost cylindrical screen 9 extends above the top plate 15 and is embedded in the treatment liquid discharge pipe 5. The upper opening portion of the sealing wall portion 9b of the innermost cylindrical screen 9 constitutes the outlet 8 of the screen assembly 7.
[0054] In this embodiment, the screen portions 9a, 10a, and 11a of the cylindrical screens 9, 10, 11 are respectively made of wedge-shaped wire meshes. Such as Figure 5 As shown, each of the screen portions 9a, 10a, and 11a has support rods 18 that extend along the axial direction of the screen portions 9a, 10a, and 11a and are generally columnarly arranged at predetermined intervals, and have portions protruding outward in the radial direction. 18a and a wedge-shaped metal wire 19, the wedge-shaped metal wire 19 is spirally wound on the outside of the support rod 18 in a direction substantially perpendicular to the support rod 18. One side 19a of the wedge-shaped wire 19 faces outward, and the other sides 19b and 19c form a slit 20, which widens radially inwardly between adjacent wedge-shaped wire portions, and is placed between the wedge-shaped wire 19 and the support At the intersection 21 of the rod 18, the tip 19 d of the wedge wire 19 facing inward is welded to the protruding part of the support rod 18.
[0055] Two different filter materials 22 and 23 with different filtering effects are filled in the respective annular gaps 12 and 13. For example, coarse sand particles may be filled in the outer annulus 13 and activated carbon particles may be filled in the inner annulus 12. For another example, activated carbon particles may be filled in the outer annulus 13 and ion exchange resin particles may be filled in the inner annulus 12. In order to use these filter materials for the desired filtration operation, various other combinations of different filter materials are possible. An advantage of the filter device of the present invention is that people do not need to consider the difference in specific gravity between the filter materials to be selected, and therefore, compared with the prior art filter device, the degree of freedom in selecting filter materials is broadened.
[0056] The filter materials 22 and 23 can be filled to a position slightly higher than the boundary line between the screen portions 9a, 10a, and 11a and the sealing wall portions 9b, 10b, and 11b, but the filter materials 22 and 23 cannot be filled into the annular chambers 16 and 17 Inside. This arrangement is necessary to allow the filter materials 22 and 23 to freely move upward in the annular chambers 16 and 17 during the backwash operation.
[0057] In the above embodiment, the three-layer cylindrical screen forming two annular gaps constitutes the screen assembly. In addition, the screen assembly can also be composed of four or more cylindrical screens forming three or more annular gaps, and three or more different filter materials can be used to fill these annular gaps.
[0058] During the operation, the treatment liquid is introduced from the inlet 3 of the container 2 and enters the outermost cylindrical screen 11 of the pre-filled annular multilayer screen assembly 7 through the slit 20, and passes through the filter materials 23 and 22. Two different filtering operations are then entered into the innermost cylindrical screen 10. Then the treatment liquid flows into the treatment liquid discharge pipe 5 through the outlet 8 of the screen assembly 7 and is discharged from the outlet 6.
[0059] Impurities that are not trapped by the filter material but fall to the bottom of the container 2 due to gravity, that is, the powdery suspended solid particles in the treatment liquid, are periodically removed from the bottom of the container by opening the discharge port 4, which is usually closed.
[0060] When the backwash operation is performed, the inlet 3 is closed to stop the introduction of the treatment liquid, and the backwash water is introduced from the outlet 6 of the treatment liquid discharge pipe 5, and the backwash water is forced into the annular gap between the cylindrical screens 9, 10 and 11. Within 12 and 13. The backwash water flows into the discharge port 4 to remove impurities blocking the filter materials 22 and 23 and the slits 20 of the cylindrical screens 9, 10 and 11. During the backwashing operation, the filter materials 22 and 23 filled in the annulus 12 and 13 are agitated by the backwash water, and the uppermost part thereof expands or moves upward in the annular chambers 16 and 17, thus causing the filter material due to backwashing The upper parts of 22 and 23 move upward, making it possible to flip the lower parts of the filter materials 22 and 23 in a limited space. Therefore, all the filter materials 22 and 23 filled in the annulus 12 and 13 are turned over, thereby facilitating the removal of impurities from the filter materials 22 and 23.
[0061] Refer to below Figure 6 Another embodiment of the invention is described. In this embodiment, in Figure 1-5 A vibrator 30 is provided in the innermost screen 9 of the illustrated embodiment. in Figure 6 In the embodiment, the same reference mark is used to identify the Figure 1-5 The component parts of the embodiment are the same, and the description of these same parts will be omitted. in Figure 6 In, only the innermost cylindrical screen 9 is drawn, and the description of the other cylindrical screens 10 and 11 is omitted.
[0062] The vibrator element provided in the innermost cylindrical screen 9 is described in the applicant's co-pending US Patent Application No. 09/012,292, which is hereby incorporated by reference.
[0063] A vibrator 30 is provided in the innermost cylindrical screen 9. The vibrator 30 is composed of a shaft 32 arranged at the center of the screen 9 and coaxial with the screen 9 and a plurality of leaf springs 33 fixed on the shaft 32 composition. The upper end of the shaft 32 protrudes from the upper end of the screen 9 and is connected to a vibrator drive unit 34 which is provided above the upper top plate 15 of the container 2. The vibrator drive unit 34 is driven by an unillustrated motor, and the drive shaft 32 rotates at a predetermined speed.
[0064] A plurality of pairs of leaf springs 33 are fixed on the shaft 32 along the entire length of the shaft 32 located in the screen 9 in such a way that each pair of leaf springs 33 extend along the radial direction of the screen 9 and are connected to adjacent ones. The pair of leaf springs 33 are arranged crosswise. The radial length of each leaf spring 33 is determined so that the front end portion 33a of the leaf spring 33 is in close engagement with the inner radial portion of each support rod 18.
[0065] During the filtering operation, the shaft 32 of the vibrator 30 is rotated by the vibrator drive unit 34. Assuming that the shaft 32 rotates counterclockwise, the leaf spring 33 is figure 1 The state shown moves to a state where the front end portion 33a of the leaf spring 33 is in close contact with the inner radial portion of the support rod 18. The leaf spring 33 is pushed and bent, thereby being elastically separated by the support rod 18. Therefore, when the shaft 32 rotates, the support rods 18 are compressed by the leaf spring 33, causing each support rod 18 and the wedge wire 19 of the filter element fixed on the support rod 18 to slightly vibrate. This vibration is transmitted from the innermost cylindrical screen 9 to the other cylindrical screens 10 and 11, so that the entire screen assembly 7 is vibrated by the vibrator 30.
[0066] When the liquid enters the filter element, the powdery suspended solid impurity particles that may be deposited on the surface of the filter element in the treatment liquid are shaken off the surface of the filter element due to this vibration, so that these suspended solids are far away from the surface of the filter element. Prevent clogging of filter elements. Therefore, when the filtering operation is continuously performed without stopping the filtering operation for backwashing, the filtering device can prevent the filter element from clogging.
[0067] Figure 7 Another embodiment of the invention is described. The vibrator 47 of this embodiment is described again in the applicant's co-pending US patent application No. 09/012,272, which is hereby incorporated by reference. versus figure 1 with 6 In contrast to the embodiment, this embodiment is suitable for use in a filter device in which the treatment liquid flows from the inside of the screen assembly to the outside, and the powdered solid impurity particles are collected adjacent to the inner surface of the wedge wire.
[0068] in Figure 7 In the embodiment, only the outermost cylindrical screen 40 is drawn, and the description of the middle and innermost cylindrical screens is omitted.
[0069] In this embodiment, such as Figure 7 As shown, the cylindrical screen 40 includes support rods 41, which extend along the axial direction of the screen 40, and are usually arranged in a columnar shape at predetermined intervals. The radially inward portion has protruding portions 41a, and the wedge-shaped metal wires 42 follow The direction substantially intersecting the support rod 41 is spirally wound inside the support rod 41. One side 42a of the wedge-shaped wire 42 faces inward, and the other two sides 42b and 42c form a slit 43. The slit 43 widens radially outward at the adjacent wedge-shaped wire portion, and the tip portion 42d facing the outside is in the wedge-shaped metal The intersection 44 of the wire 42 and the support rod 41 is welded to the protruding part 41 a of the support rod 41. The wedge-shaped metal wire 42 constitutes a cylindrical filter element.
[0070] A vibrator 47 is provided on the outside of the screen 40. The vibrator 47 is composed of a grid-shaped columnar frame 45 extending in the axial direction of the screen 40 and a plurality of leaf springs 46. Many leaf springs 46 are fixed to the frame 45 at one end thereof. The axially extending rod 45a can be attached to the supporting rod 41 at the other end.
[0071] The frame 45 is connected to an unshown drive unit at one end, and the frame 45 is rotated by the drive unit.
[0072] Along the entire length of the frame 45, there are multiple pairs of leaf springs 46 fixed on the shaft 45a of the frame 45. The screen 40 in the frame 45 is arranged in such a way that each pair of leaf springs 46 extend along the radial direction of the screen 40 , And adjacent pairs of leaf springs 46 are arranged crosswise. The radial length of each leaf spring 46 is determined so that the front end portion 46a of the leaf spring 46 is in close engagement with the outer radial portion of each support rod 41.
[0073] During the filtering operation, the treatment liquid flows from the inside of the screen 40 to the outside. when Figure 7 When the frame 45 in the middle rotates clockwise, each leaf spring 46 closely adheres to and elastically separates from each supporting rod 41, and this action is repeated, so that the wedge-shaped wire 42 is slightly vibrated by the supporting rod 41. With this arrangement, the vibration is transmitted to the middle and innermost cylindrical screens 10 and 9, so that the entire screen assembly 7 is vibrated, so the powdery solid impurity particles in the screen assembly 7 are shaken down. In this way Figure 6 The shown filtering device has a similar effect.
[0074] Figure 8 with 9 Another embodiment of the invention is described. An element for generating a flow different from the direction of flow entering the screen assembly is described in Applicant's co-pending US Patent Application No. 09/050,618, which is hereby incorporated by reference.
[0075] The filtering device 50 has a container 52 having a circular cross-section. An inlet 52a for introducing the treatment liquid is formed in the lower part of the container 52. The pump 53 is connected to the filtering device 50. The injected treatment liquid almost reaches the top wall of the container 52. The screen holder 54 with a short cylindrical structure is sealed at its upper and lower ends by a top plate 54a and a bottom plate 54b, respectively. The screen holder 54 is suspended in the processing liquid in the container 52 by a hollow drive shaft 55, which extends vertically. , Passing through the opening 52b formed on the top wall of the container 52, and its lower end is firmly fixed on the top plate 54a of the screen bracket 54, and its upper end is connected to the drive unit 56, which is fixed on the filter device 50 The upper frame 57 is on.
[0076] A plurality of (four in this embodiment) pre-filled ring-shaped multilayer screen assemblies 7 are firmly fixed on the bottom plate 54b of the screen support 54, and these screen assemblies extend vertically downward to be immersed in the treatment liquid. The structure of each screen assembly 7 and Figure 1-5 The screen assembly 7 shown in the embodiment is similar, so its description will be omitted.
[0077] The open upper end of the screen assembly 7 communicates with the inner space of the hollow screen bracket 54, and the hollow drive shaft 55 also communicates with the inner space of the screen bracket 54. The drive shaft 55 extends through the drive unit 56, and the elastic hose 58 constitutes a treatment liquid outlet and is connected to the upper end of the drive shaft 55.
[0078] The drive unit 56 includes a motor (not shown) and a known drive mechanism such as a slider crank mechanism, which transmits reciprocating sliding to the drive shaft 55, so that the drive shaft 55 reciprocates in the vertical direction. Since this transmission mechanism is well-known, its description and detailed description are omitted.
[0079] The operation of this filtering device 50 will be described below.
[0080] During the filtering operation, the pump 53 is activated to introduce the treatment liquid into each screen assembly 7 through the inlet 52a. The treatment liquid flows into the screen assembly 7 and then flows out of the hose 58 through the inner space of the screen support 54 and the hollow drive shaft 55.
[0081] During the filtering operation, the drive unit 56 is activated so that the drive shaft 55 is Figure 8 The arrows A and A'in the middle show continuous vertical reciprocating movement. Through this operation, the screen assembly 7 fixed on the screen support 54 also performs vertical reciprocating motion, as a result, the flow direction of the treatment liquid is different from the flow direction of the treatment liquid flowing into the screen assembly 7. That is, in addition to the horizontal flow of the liquid flowing into the screen assembly 7, a vertical reciprocating flow relative to the surface of the screen assembly 7 is also formed.
[0082] According to this embodiment, the vertical flow of liquid caused by the vertical reciprocating motion of the screen assembly 7 causes the powdery solids that tend to deposit on the surface of the wedge wire to be washed away from the wedge wire surface. . As a result, it is possible to prevent the wedge-shaped wire slit and the filter material from being clogged by the powdery solid 5.
[0083] In another embodiment of the present invention, the drive unit 56 includes a motor (not shown). The drive shaft 55 is connected to the drive shaft of the motor through a reduction gear. The connection method transmits the rotation of the motor to the drive shaft 55. In this embodiment, the motor in the drive unit 56 makes the drive shaft 55 such as Figure 8 The middle arrow rotates around its axis, so the screen support 54 also rotates with the drive shaft 54. This causes the treatment liquid in the container 52 to generate a vortex, which causes the flow direction of the liquid to be different from the direction of flow into the screen assembly 7. As a result, the solid particles that tend to deposit on the surface of the screen assembly 7 are washed away by this vortex, so that the same as the aforementioned Figure 8 The same advantages as the implementation.
[0084] Will refer to Figure 10-13 Another embodiment of the invention is described. In this embodiment, the same reference mark is used to identify the Figure 1-5 The component parts of the embodiment are the same, and the description of these parts is omitted.
[0085] The filtering device 60 of this embodiment has such figure 1 In the embodiment, the pre-filled annular multilayer screen assembly 7 in the container 2. Picture 10 with 11 Only the innermost cylindrical screen 62 of the screen assembly 7 is given, and the description of the other cylindrical screens of the screen assembly 7 is omitted. in Picture 10 with 11 In the upper and lower end parts, only the supporting rod 18 and the wedge-shaped metal wire 19 are provided, and the middle part is replaced by a dot-dash line.
[0086] A liquid delivery pipe 69 having a rectangular cross section is provided above the innermost cylindrical screen 62. The liquid delivery pipe 69 has a cylindrical opening 70 coaxial with the screen 62 formed at the bottom thereof for discharging the treated liquid and introducing backwash water. The portion where the opening 70 is formed has a stepped portion in the vertical direction, and the lower portion 70a of the stepped portion has a smaller diameter than the upper portion 70b of the stepped portion.
[0087] The backwash pipe 63 is composed of tubular elements arranged coaxially with the screen 62 in the screen 62. The upper opening of the backwash pipe 63 forms a sliding part 63a, the inner diameter of the sliding part 63a is slightly larger than the outer diameter of the lower part 70a of the cylindrical opening 70 of the liquid delivery pipe 69, and the sliding sleeve is on the outer peripheral surface of the lower part 70a of the cylindrical opening 70 on. The lower end portion of the backwash pipe 63 is sealed with a disc-shaped bottom plate 63b. A pin 71 is provided in the center of the lower surface of the bottom plate 63b. The pin 71 is inserted into the pin receiving groove 72 formed on the bottom plate 14 of the screen 62 so that the backwash pipe 63 is supported by the screen 62. In this setting, the backwash tube 62 can rotate around its axis.
[0088] The backwash pipe 63 has a treatment liquid inlet 63c at its lower end, which is composed of a plurality of circular openings. The opening at the upper end of the backwash pipe 63 forms an opening 63d for draining the treatment liquid and introducing backwash water. The opening 63d is connected to the cylindrical opening 70 of the liquid delivery pipe 69.
[0089] The backwash pipe 63 has a plurality of backwash water injection holes 73 at predetermined intervals in its axial direction. In this embodiment, from Picture 12 It can be clearly seen that the four groups of vertically arranged injection holes 73a, 73b, 73c, and 73d are arranged in the circumferential direction at intervals of 90 degrees. According to this arrangement, it is possible to prevent malfunctions caused by the effect of the spray deviation of the backwash water in one direction during the rotation of the backwash pipe 63.
[0090] The optimal diameter of the backwash water injection hole 73 is 0.5-0.8 mm. If the diameter exceeds 0.8mm, the spray pressure of the backwash water is insufficient, reducing the effect of preventing clogging. If the diameter is less than 0.5mm, the injection hole may be blocked by fine dust.
[0091] As a preferred embodiment, a backwash pipe with a diameter of 20 mm can be arranged in the innermost cylindrical screen with a diameter of 70 mm, and backwash water spray holes with a diameter of 0.7 mm can be formed at intervals of 5 mm.
[0092] The one-way valve 74 is provided on the side of the opening 63d for discharging the treatment liquid and introducing backwash water, adjacent to the inlet 63c of the backwashing pipe 63 for the treatment liquid. The one-way valve 74 is composed of a disc-shaped valve body 74a, the valve body 74a can be located on the annular valve seat 74b, the valve stem 74c extending upward in the axial direction from the valve body 74a, and the annular ring inserted into the valve stem 74c. Element and four support rods that fix the ring element to the inner wall of the backwash pipe 63c. Figure 13 ), and a spring coil 74e with one end fixed on the valve body 74a and the other end fixed on the valve support element 74d. The spring force of the spring coil 74e should be adjusted so that the spring coil 74e is in a compressed state under unloaded conditions, and when the spring coil 74e is acted on by the backwash water pressure, the spring stretches and the valve body 74a is pressed against the valve seat 74b on. Therefore, the function of the one-way valve 74 is to allow the treatment liquid to enter the backwash pipe 63 from the inlet 63c, and to prevent the backwash water from flowing from the inside of the backwash pipe 63 to the inlet 63c.
[0093] The blade 75 is fixed to the upper part of the inner wall of the backwash pipe 63. The blade 76 is an element that makes the backwash tube rotate around its axial direction during the backwash process. The shape, size and fixed angle of the blade 75 are determined according to the size of the backwash pipe 63, the size of the backwash water pressure, and the necessary rotation speed of the backwash pipe 63.
[0094] The operation of this embodiment will be described below.
[0095] During the filtering operation, a pump (not shown) is used to introduce the treatment liquid into the container. Such as Picture 10 As shown, the treatment liquid flows into the screen 62 through the slit 20 of the screen 62, and then enters the backwash pipe 63 through the inlet 63c provided at the lower part of the backwash pipe 63. At this time, the one-way valve 75 is in an open state, such as Picture 10 As shown, the spring coil 74e is compressed, so that the treatment liquid flows through the one-way valve 74 in the arrow direction, enters the liquid delivery pipe 69 through the opening 63d and the cylindrical opening 70, and then is discharged.
[0096] During the backwashing process, the treated liquid is discharged from the container, and then as Picture 11 As shown, pressurized backwash water is introduced into the backwash pipe 63 through the cylindrical opening 70 and the opening 63d. The valve body 74a of the one-way valve 74 moves downward by the force of the pressurized backwash water against the force of the spring coil 74e, and presses on the valve seat 74b, thereby closing the one-way valve 74. Therefore, the pressurized backwash water in the backwash pipe 63 is sprayed from the backwash water spray hole 73 in the form of a jet, and the jet hits the screen 62. At the same time, the backwash water collides with the blade 75 and pushes the blade 75, so that the backwash pipe 63 rotates around its axial direction. As a result, when the backwash pipe 63 rotates, the jet subsequently collides with the entire inner side wall of the screen 62, so that the impurities blocking the screen 62 and the filter material in the annulus of the screen assembly 7 are uniformly removed.
[0097] Figures 14 and 15 show another embodiment of the present invention.
[0098] In this embodiment, the filtering device 80 includes a box-shaped container 81 in which a plurality of (5 in the illustrated embodiment) pre-filled annular multi-layer screen assemblies 7 arranged in parallel are installed. The structure of each screen assembly 7 is basically the same as Figure 10-13 The embodiments shown are the same. The openings in each screen assembly 7 for discharging the treated liquid and introducing backwash water are connected to the main liquid conveying pipe 87.
[0099] The container 81 has a treatment liquid inlet 82, a treatment liquid outlet 83, a liquid conveying port 84 connected to a liquid conveying pipe 87, and a discharge port 85. The discharge port 85 is usually closed and opened when impurities are discharged. The diameter of the treatment liquid inlet 82 is larger than the liquid delivery port 84. The pump 86 is connected between the treatment liquid inlet 82 and the treatment liquid outlet 83 to form a closed loop for the treatment liquid to circulate. Through the action of the pump 86, the treatment liquid flows into the container 81 from the inlet 82 at a larger flow rate than the treatment liquid flowing out of the liquid delivery port 84. The flow of the treatment liquid in the container 81 is shown by the arrow F in Fig. 14, which is different from The flow direction of the treatment liquid entering the screen assembly 7.
[0100] During the filtering operation, the discharge port 85 is closed, and the treatment liquid is introduced into the container 81 through the inlet 82. The treatment liquid enters the screen assembly 7, and then the treatment liquid is discharged from the liquid delivery port 84 through the liquid delivery pipe 87. At the same time, the excess treatment liquid circulates in the container 81, and its flow direction is different from the flow direction into the screen assembly 7 during circulation, so that the powdery solid impurity particles blocking the filter material can be washed off the surface of the screen assembly 7. Therefore, the amount of clogging is reduced.
[0101] During the backwashing process, the inlet 82 and outlet 83 of the container 81 are closed, and the filtered treatment liquid is discharged. Then open the discharge port 85, and force the pressurized backwash water into the screen assembly 7 through the liquid delivery port 84, according to the above Figure 10-13 The way to backwash. The dirty water after backwashing is discharged from the drain port 85.
[0102] In the embodiment shown in FIG. 16, a plurality of (6 in the illustrated embodiment) of the containers 81 in FIGS. 14 and 15 are arranged in parallel, and the inlet 82, outlet 83, liquid delivery port 84 and discharge port 85 of each container 81 It is connected by the main connecting pipes 92, 93, 94 and 95, and is combined into a small component 90.
[0103] Figure 17 In the given embodiment, multiple (three in the illustrated embodiment) small components 90 are arranged in parallel, and the main connecting pipes 92, 93, 94 and 95 are further connected through the main connecting pipes 102, 103, 104 and 105, Combine into a larger component 100.
[0104] In the embodiment shown in Figure 18, a plurality of screen assemblies 7 are arranged in and Figure 19 The container of the prior art filter device shown is similar.
[0105] The container 110 has a treatment liquid inlet 111, a treatment liquid outlet 112 and a discharge port 114.
[0106] It is assumed that the container and the container 110 of the prior art filter device are both 2m in inner diameter and 2m in height. The effective filter surface area of ​​the filter material d of the prior art filter equipment is πr 2 = 3.14m 2. In contrast, in the container 110 of the present embodiment, 90 columnar components 7 having a diameter of 12.5 mm and a height of 100 mm can be placed in the container 110, and the interval between the mesh components is 50 mm. Since the effective filtering surface area of ​​a single screen assembly 7 is 0.125m×π×1m=0.4m 2 , The total effective filtering surface area of ​​90 screen components 7 reaches 0.4m 2 ×90=36m 2. Therefore, the filter device of the present invention can achieve more than 10 times the effective filter surface area of ​​the prior art filter device.
[0107] In the above embodiment, as the filter element constituting the cylindrical screen element of the screen assembly 7, wedge-shaped wire, perforated plate, wire mesh, filter cloth, and other screen elements can be used. In the case of using a wedge-shaped wire, the way the wedge-shaped wire is wound on the support rod should form a slit with a predetermined width between adjacent parts of the wedge-shaped wire, and a wedge-shaped wire cylindrical screen with a V-shaped slit It has inherent anti-clogging ability, so it can effectively prevent the clogging of the screen slits and the filter material, and extend the continuous filtering operation time of the filter equipment.
[0108] The components shown in Figure 16 and Figure 17 The larger components shown can also be figure 1 , 6 And 9 shown in the filter equipment composition.

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Similar technology patents

Report data generating method and system

ActiveCN103473342ASimplify the docking processImprove work efficiency
Owner:BEIJING JOIN CHEER SOFTWARE

Vacuum cleaner

InactiveCN103356140Aprevent liftingImprove work efficiency
Owner:SUZHOU HAAN TECH +1

Caking fertilizer crushing device for agriculture big data

Owner:安徽众力农业装备科技有限公司

Classification and recommendation of technical efficacy words

  • Improve work efficiency

Cooperation service platform facing different source data

InactiveCN101174957AImprove management level and qualityImprove work efficiency
Owner:NANJING UNIV OF FINANCE & ECONOMICS

Screw drilling tool, vertical drilling tool testing method and well inclination simulation testing equipment

InactiveCN111594144AReduced height requirementsImprove work efficiency
Owner:DEZHOU UNITED GASOLINEEUM MACHINERY

Method for intelligent automatic identification of transmission circuit parts

Owner:INFORMATION COMM COMPANY STATE GRID SHANDONG ELECTRIC POWER +2

Keyboard spill-proofing mechanism

ActiveUS7030330B2minimize manufacturing costimprove work efficiency
Owner:LITE ON SINGAPORE PTE LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products