JP2008073679A - Cartridge for filtration - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily make a cartridge for filtration which is low in cost, light and different in length in the vertical direction. <P>SOLUTION: A plastic upper end member 2, a plastic lower end member 3 and a plastic intermediate member 4 located between the upper end member 2 and the lower end member 3 are arranged in parallel, and a plurality of reinforcing wire materials 5, which turn in the vertical direction through the intermediate member 4, are arranged at equal intervals on the left and right sides between the upper end member 2 and the lower end member 3 to form a framework. The front and back surfaces of the framework are covered with membrane filters 6, and a filtrated water-sucking nozzle 9 is upward formed at the upper end edge of the upper end member 2, and a filtrated water-collecting groove 10 is formed at the horizontal part of the upper end ember 2. A water-collecting part 12, which goes through the front and back surfaces of the upper end member 2 so that it may be connected to the filtrated water-collecting groove 10, is formed just below the filtrated water-sucking nozzle 9. A filtrated water flow channel 39, which goes through in the vertical direction, is formed in the intermediate member 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a filtration cartridge that is used by being immersed in a water treatment tank in order to remove sludge components from activated sludge water and perform filtration, for example.

As a conventional cartridge for this type of filtration, for example, as disclosed in Patent Document 1, a filter membrane is provided so as to cover the surface of the filter plate, and a water collecting portion is provided through the front and back of the upper side of the filter plate, A suction nozzle whose one end communicates with the water collection section is provided at the periphery of the filter plate, and a plurality of slits that open to the surface of the filter plate communicate with the water collection section at one end and are arranged in parallel from the upper side to the lower side of the filter plate. It is known that the interval between adjacent slits is 1/5 to 1/20 of the length in the vertical direction of the filter plate.
Specifically, the plurality of slits opened on the surface of the filter plate are oriented in the vertical direction, and the upper ends of the slits are configured to communicate with the water collecting section. In addition, the filter plate is generally integrally formed using a synthetic resin as a material.
JP-A-8-281264

  In the cartridge configuration disclosed in Patent Document 1, the filter plate has a length from the upper end to the lower end of the cartridge, and requires a large mold to mold the filter plate, and the resin used There was a problem that the amount was large, leading to an increase in cost. Further, the filter plate is integrally formed with a mold, and it is impossible to make cartridges having different lengths in the vertical direction with one filter plate.

  SUMMARY OF THE INVENTION An object of the present invention is to solve such problems, and makes it possible to easily produce an inexpensive and light-weight filtration cartridge having different vertical lengths.

  A filtration cartridge according to claim 1 of the present invention is a filtration cartridge used by being immersed in a water treatment tank so as to be positioned above a diffuser tube in order to perform water filtration. An upper end member, a lower end member made of synthetic resin, and an intermediate member made of synthetic resin located between the upper end member and the lower end member are arranged in parallel to each other, and the intermediate member is interposed between the upper end member and the lower end member. A plurality of reinforcing wires oriented in the vertical direction through the member are provided at equal intervals on the left and right to form a framework, and both sides of the framework are covered with a filtration membrane, and filtered water is sucked into the upper edge of the upper end member. A nozzle is formed upward, a filtrate collecting groove is formed in a horizontal portion of the upper end member, and a water collection penetrating both front and back surfaces of the upper member so as to be connected to the filtrate collecting groove immediately below the filtrate suction nozzle. Part is formed , The said intermediate member, characterized in that the filtering water path through the vertical direction is formed.

  According to a second aspect of the present invention, the right and left side portions of the upper end member, the lower end member, and the intermediate member are tapered so that the thickness decreases toward the outside, and tape is attached to the thin tapered portion. An insertion groove is formed, a sealing tape having a length between the upper end member and the lower end member is inserted into the tape insertion groove, and the filtration membrane is inserted into the upper end member, the lower end member, the intermediate member, and the sealing tape. It is characterized by being joined by ultrasonic fusion.

  The filter cartridge according to claim 3 is characterized in that the sealing tape is made of a synthetic resin compatible with the back surface of the filter membrane.

  According to a fourth aspect of the present invention, there is provided the filtration cartridge according to claim 4, wherein the upper end of the upper end member and the lower end of the lower end member are provided with a connection portion for connecting adjacent filtration cartridges, and a plurality of filtration cartridges are connected to the connection portion. And a through hole is formed through which a support rod for supporting the water treatment tank is inserted.

  As described above, in the filtration cartridge of the present invention, the water to be treated in the water treatment tank flows from the filtration membrane into the filtrate collecting groove with a large number of filtration cartridges arranged in the water treatment tank. It is sucked from the filtered water suction nozzle through the water portion and taken out of the water treatment tank. At this time, the two filtration membranes on the front and back sides try to catch each other in the direction in which there is no gap between the two filtration membranes due to the water pressure in the water treatment tank or the suction force from the filtrate water suction nozzle. Since there are a plurality of reinforcing wires between the filtration membranes, a space remains between the filtration wires and the filtration membrane around the reinforcing wires, and filtered water flows through this space and flows into the filtrate collecting groove. it can. In addition, the air ejected from the air diffuser rises through a gap between adjacent filtration cartridges. At this time, the air contacts the filtration membrane that forms the surface of the filtration cartridge, and the filtration membrane It works to scrape off the dirt on the surface. In the filtration cartridge of the present invention, there is only a reinforcing wire between the upper end member, the intermediate member, and the lower end member. Therefore, the filtration cartridge is flexible in the vertical direction and is swayed by air. Effective for removing dirt. In particular, the filtration cartridge of the present invention does not require a filter plate having a full length in the up-down direction, is inexpensive and lightweight, and can easily produce filtration cartridges having different lengths in the up-down direction.

  In addition, the left and right side portions of the upper end member, the lower end member, and the intermediate member are tapered so that the thickness decreases toward the outside, and a tape insertion groove is formed in the thin tapered portion, for sealing. By inserting the tape into the tape insertion groove and joining the filtration membrane to the upper end member, lower end member, intermediate member and sealing tape by ultrasonic fusion, the sealing performance at both the left and right sides is improved. By using a sealing tape made of a synthetic resin compatible with the resin, the sealing performance becomes stronger.

  Furthermore, a connecting portion for connecting adjacent filtration cartridges to the upper end of the upper end member and the lower end of the lower end member is provided, and support for supporting a large number of filtration cartridges in the connected state in the water treatment tank. By forming the through-hole through which the rod is inserted, the filter cartridge flexible in the vertical direction can be easily set in the water treatment tank.

Hereinafter, an embodiment of the present invention will be specifically described with reference to FIGS.
In the figure, reference numeral 1 denotes a filtration cartridge that is used immersed in a water treatment tank in order to remove sludge components from activated sludge water and perform filtration. The filtration cartridge 1 is an upper end member 2 made of synthetic resin. And a synthetic resin lower end member 3 and a synthetic resin intermediate member 4 positioned between the upper end member 2 and the lower end member 3 are arranged in parallel to each other, and the upper end member 2 and the lower end member 3 are A plurality of reinforcing wires 5 facing in the vertical direction are provided at equal intervals on the left and right to form a framework. Then, by covering both the front and back surfaces of this framework with a filtration membrane 6, a vertically long rectangular filtration cartridge 1 is produced as viewed from the front.

  Next, the upper end member 2, the lower end member 3, and the intermediate member 4 will be described in detail. First, the lower end of the upper end member 2 is recessed upward, and the filtration membrane extends between the left and right end portions on both front and back surfaces. Six melt allowances 7 are formed. A recess 8 is formed at the upper end edge of the upper end member 2, and the filtered water suction nozzle 9 is formed upward in the recess 8 so as not to protrude upward from the recess 8. Reference numeral 10 denotes a filtrate collecting groove formed horizontally on the front and back surfaces of the upper end member 2 below the melting allowance 7 formed in the horizontal portion of the upper end member 2. Filtrated water inflow grooves 11 communicating with the filtered water collecting groove 10 are formed at appropriate intervals in the horizontal direction of the upper end member 2. Further, a water collection portion 12 penetrating both the front and back surfaces of the upper end member 2 is formed immediately below the filtrate water suction nozzle 9 so as to be connected to the filtrate collection groove 10. The left and right side portions at a position lower than the upper end of the upper end member 2 are tapered so that the thickness is reduced toward the outside, and the left and right ends of the upper end member 2 located above the thin tapered portion 13 are tapered. Both side portions 14 slightly protrude outward from the thin tapered portion 13. Reference numerals 15a and 15b denote tape insertion grooves formed so as to be connected to the thin tapered portion 13 and the left and right side portions 14. The upper end of the sealing tape 16 is inserted into the tape insertion grooves 15a and 15b on the left and right sides of the upper end member 2, respectively. The right and left side portions 14 and the sealing tape 16 are connected by ultrasonic welding at the positions of the holes 14a formed in the left and right side portions 14. The sealing tape 16 is made of a synthetic resin compatible with the back surface of the filtration membrane 6 and has a length between the upper end member 2 and the lower end member 3. The sealing tape 16 inserted into the tape insertion groove 15a of the thin tapered portion 13 protrudes slightly outward from the tape insertion groove 15a. Reference numeral 17 denotes an insertion hole formed at the center of the upper end member 2 in the thickness direction for inserting the reinforcing wire 5. The upper end of the reinforcing wire 5 inserted into the insertion hole 17 is formed in the upper end member 2. It is connected to the upper end member 2 by ultrasonic fusion at the position of the hole 2a. Reference numeral 18 denotes a connecting portion of the filtration cartridge 1 formed at two locations in the vicinity of the left and right ends of the upper end member 2 so as to protrude above the upper end member 2. The front shape is circular. A through-round hole 19 penetrating in the front-rear direction is formed at the center of the connecting portion 18, and a convex portion 20 is formed at the lower portion on the front side of the connecting portion 18 at a position sandwiching the through-round hole 19. A concave portion 21 is formed on the lower surface of the connecting portion 18, and a concave portion 22 is formed on the lower portion of the connecting portion 18, and a convex portion 23 is formed on the upper portion.

  Next, the lower end member 3 has substantially the same configuration as the upper end member 2 turned upside down, and the difference from the upper end member 2 is that the filtered water suction nozzle 9, the filtered water collecting groove 10, and the filtered water inflow groove. 11 and the water collection part 12 are not formed. The lower end member 3 will be described in detail. The upper end of the lower end member is recessed downward, and a melting allowance 24 of the filtration membrane 6 is formed between the left and right end portions on both the front and back surfaces. The left and right sides located at a position higher than the lower end of the lower end member 3 are tapered so that the thickness becomes thinner toward the outside, and the left and right sides of the lower end member 3 located below the thin tapered portion 25 are tapered. Both side portions 26 slightly protrude outward from the thin tapered portion 25. Reference numerals 27a and 27b denote tape insertion grooves formed so as to be connected to the thin tapered portion 25 and the left and right side portions 26. The lower end of the sealing tape 16 is provided on the tape insertion grooves 27a and 27b on the left and right sides of the lower end member 3. The right and left side portions 26 and the sealing tape 16 are connected to each other by ultrasonic fusion at the positions of the holes 26a formed in the right and left side portions 26. The sealing tape 16 inserted into the tape insertion groove 27a of the thin tapered portion 25 protrudes slightly outward from the tape insertion groove 27a. Reference numeral 28 denotes an insertion hole formed at the center in the thickness direction of the lower end member 3 for inserting the reinforcing wire 5. The lower end of the reinforcing wire 5 inserted into the insertion hole 28 is formed in the lower end member 3. It is connected to the lower end member 3 by ultrasonic fusion at the position of the hole 3a. Reference numeral 29 denotes a connecting portion of the filtration cartridge 1 formed at two locations near the left and right ends of the lower end member 3 so as to protrude downward from the lower end member 3. The front shape is circular. A through-round hole 30 penetrating in the front-rear direction is formed at the center of the connecting portion 29, and a convex portion 31 is formed at a lower portion on the front side of the connecting portion 29 at a position sandwiching the through-round hole 30. A concave portion 32 is formed in the lower portion of the connecting portion 29, and a concave portion 33 is formed in the lower portion of the connecting portion 29, and a convex portion 34 is formed in the upper portion. Further, the lower end of the lower end member 3 other than the connecting portion 29 is formed to have a double-edged tapered shape with a V shape. 35 is the taper part.

  Next, the intermediate member 4 will be described in detail. Insert holes 36 through which the reinforcing wire 5 arranged at equal intervals on the left and right sides are inserted in the vertical direction are formed at equal intervals. A tape insertion groove 37 a is formed at the tip of the thin tapered portion 37. The sealing tape 16 inserted into the tape insertion groove 37a slightly protrudes outward from the tape insertion groove 37a. In addition, a melt allowance 38 for the filtration membrane 6 is formed between the left and right ends on both the front and back surfaces. Further, the intermediate member 4 is formed with a filtrate water passage 39 penetrating in the vertical direction between the adjacent insertion holes 36 and between the insertion holes 36 and the side portions.

  As described above, the filtration membrane 6 is affixed so as to sandwich the framework composed of the upper end member 2, the intermediate member 4, the lower end member 3, and the plurality of reinforcing wires 5 provided at equal intervals on the left and right sides. The filtration membrane 6 is joined by ultrasonic fusion at the locations of the melting allowances 7, 38, 24 of the upper end member 2, the intermediate member 4, and the lower end member 3, and between the left and right side portions of the two filtration membranes 6 on the front and back sides. Are joined by ultrasonic fusion with the sealing tape 16 interposed therebetween to complete the filtration cartridge 1.

  The filtration cartridge 1 having the above-described configuration is immersed above the air diffuser at regular intervals in the water treatment tank in a state where the long side faces up in the vertical direction. At this time, the connection portion 18 and the connection portion 29 are connected at the upper and lower ends of the filtration cartridges 1 adjacent to each other. Specifically, the convex portion 20 and the concave portion 22 of the connecting portion 18 facing each other, the concave portion 21 and the convex portion 23 are fitted, and the convex portion 31 and the concave portion 33 of the connecting portion 29 facing each other, and the concave portion 32 and the convex portion 34 are fitted. The filtration cartridges 1 are connected. Then, two support bars (not shown) are inserted through the through-round hole 19 of the connecting portion 18 at the upper end portion of the filtration cartridge 1 and through the through-round hole 30 of the connecting portion 29 at the lower end portion, respectively. By supporting both ends of these support rods in the water treatment tank, a large number of filtration cartridges 1 are connected and arranged in the water treatment tank. In such a state where a large number of filtration cartridges 1 are arranged in the water treatment tank, the water to be treated in the water treatment tank passes through the filtrate inflow groove 11 from the filtration membrane 3 into the filtrate collection groove 10. It flows in, is sucked from the filtered water suction nozzle 9 through the water collection part 12, and is taken out of the water treatment tank. At this time, the two filtration membranes 3 on the front and back sides try to catch each other in the direction in which there is no gap between the two filtration membranes 3 due to the water pressure in the water treatment tank and the suction force from the filtrate water suction nozzle 9. Since there are a plurality of reinforcing wires 5 between the two filtration membranes 3, a space remains between the reinforcing wires 5 and the filtration membrane 3, and filtered water flows through this space to pass the filtered water. It flows into the filtrate collecting groove 10 from the inflow groove 11. Further, the air ejected from the air diffuser rises through a gap between adjacent filtration cartridges 1. At this time, the air contacts the filtration membrane 3 that forms the surface of the filtration cartridge 1 and acts to scrape off the dirt on the surface of the filtration membrane 3. Since the filtration cartridge 1 of the present embodiment is made in a state where the upper end member 2, the intermediate member 4, and the lower end member 3 are connected by the reinforcing wire 5, the upper and lower members are flexible in the vertical direction and swayed by the air. This also serves to remove dirt on the surface of the filtration membrane 3. Further, as described above, the tapered portion 35 is formed at the lower end of the lower end member 3 other than the connecting portion 29, so that the air ejected from the air diffuser is between the adjacent filtration cartridges 1 using the tapered portion 35 as a guide. It is easy to enter the gap, and the dirt removal efficiency on the surface of the filtration membrane 3 can be improved.

  Incidentally, the number of reinforcing wires 5 provided in the filtration cartridge 1 is three in the embodiment shown in the drawings, but may be two or more. The reinforcing wire 5 may be made of metal or synthetic resin.

  Further, the length of the filtration cartridge 1 is such that the number of intermediate members 4 positioned between the upper end member 2 and the lower end member 3 is two or more, and a long length is used as the reinforcing wire 5 and the filtration membrane 3 can also be easily formed in a desired length by using a large one that is long in the vertical direction.

It is a disassembled perspective view of the cartridge for filtration in one embodiment of the present invention. It is an enlarged front view of the upper end member used for the cartridge for filtration. It is an enlarged front view of the lower end member used for the same cartridge for filtration. It is an enlarged front view of the intermediate member used for the cartridge for filtration. FIG. 3 is an enlarged view of a main part of FIG. 2. It is an AA expanded sectional view of FIG. It is BB expanded sectional drawing of FIG. It is CC expanded sectional drawing of FIG. FIG. 6 is an enlarged sectional view taken along the line DD in FIG. 4. It is a perspective view of the framework of the cartridge for filtration. It is a completion perspective view of the cartridge for filtration. It is a principal part notch side view which shows the connection state of the cartridge for filtration.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filtration cartridge 2 Upper end member 3 Lower end member 4 Intermediate member 5 Reinforcing wire 6 Filtration membrane 7 Melting allowance 8 Recess 9 Filtrated water suction nozzle 10 Filtrated water collecting groove 11 Filtrated water inflow groove 12 Water collecting part 13 Thin tapered part 14 Left and right side portions 15a and 15b Tape insertion groove 16 Seal tape 17 Insertion hole 18 Connection portion 19 Through-round hole 20 Convex portion 21 Concavity portion 22 Concavity portion 23 Convex portion 24 Melting margin 25 Thin tapered portion 26 Right and left side portions 27a and 27b Tape insertion portion Groove 28 Insertion hole 29 Connecting part 30 Through-round hole 31 Convex part 32 Concave part 33 Concave part 34 Convex part 35 Taper part 36 Insertion hole 37 Thin wall tapered part 37a Tape insertion groove 38 Melting allowance 39 Filtration water flow path

Claims (4)

A filtration cartridge that is used by being immersed in a water treatment tank so as to be positioned above a diffuser pipe for performing water filtration, comprising a synthetic resin upper end member, a synthetic resin lower end member, and these An intermediate member made of synthetic resin located between the upper end member and the lower end member is arranged in parallel with each other, and a plurality of reinforcing wire rods that are vertically directed through the intermediate member between the upper end member and the lower end member. Are provided at equal intervals to form a framework, and both sides of the framework are covered with a filtration membrane, a filtered water suction nozzle is formed upward at the upper edge of the upper end member, and a horizontal portion of the upper end member is formed. A filtered water collecting groove is formed, and a water collecting portion penetrating both front and back surfaces of the upper end member is formed so as to be connected to the filtered water collecting groove immediately below the filtered water suction nozzle, and the intermediate member has a vertical direction Filtered water flow through Filtration cartridge, characterized in that There are formed. The left and right sides of the upper end member, the lower end member, and the intermediate member are tapered so that the thickness decreases toward the outside, and a tape insertion groove is formed in the thin tapered portion, A sealing tape having a length between the lower end member is inserted into the tape insertion groove, and the filtration membrane is joined to the upper end member, the lower end member, the intermediate member and the sealing tape by ultrasonic fusion. The filtration cartridge according to claim 1. 3. The filtration cartridge according to claim 2, wherein the sealing tape is made of a synthetic resin that is compatible with the back surface of the filtration membrane. The upper end of the upper end member and the lower end of the lower end member are provided with a connecting portion for connecting adjacent filtration cartridges, and this connecting portion is a support for supporting a large number of filtration cartridges in a connected state in the water treatment tank. The cartridge for filtration according to any one of claims 1 to 3, wherein a through-hole through which the rod is inserted is formed.

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