JP2018126691A - Membrane cartridge and membrane separation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a membrane cartridge capable of reducing an installation space in a vertical direction.SOLUTION: In a membrane cartridge 9 that is planar-shaped and disposed in a vertical direction being immersed in a tank, a membrane filter 10 is mounted on a filter plate 16; a filtered water take-out part 11 communicating with a permeated water passage 18 formed to the filter plate 16 is provided in an upper side part of the filter plate 16; and the filtered water take-out part 11 is positioned in one of side end parts in a width direction W of the filter plate 16 and tilted to an outward direction of the filter plate 16 facing a horizontal direction with respect to a vertical direction.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a membrane cartridge and a membrane separation device used for, for example, sewage treatment and sludge concentration.

  Conventionally, as this type of submerged membrane separation apparatus, for example, as shown in FIG. 11, there is an apparatus having a membrane separation unit 101 and an air diffuser 102 provided below the membrane separation unit 101. The membrane separation unit 101 includes a membrane case 103 that is open at the top and bottom, a plurality of membrane cartridges 104 provided in the membrane case 103, and a water collecting pipe 107 that collects the permeated water 106 that has passed through the filtration membrane 105 of each membrane cartridge 104. have.

  The water collecting pipe 107 is attached to one side end of the upper end portion of the membrane case 103. The plurality of membrane cartridges 104 are arranged at predetermined intervals in the thickness direction.

  The membrane cartridge 104 includes a filter plate 108, filtration membranes 105 attached to both front and back surfaces of the filter plate 108, and a permeated water extraction nozzle 109 that takes out the permeated water 106 that has passed through the filtration membrane 105. The permeated water extraction nozzle 109 is attached to the upper side of the filter plate 108 and protrudes upward along the vertical direction.

  One end portions of the plurality of connection tubes 110 curved in a mountain are connected to the permeated water extraction nozzle 109 of each membrane cartridge 104, and the other end portions of the plurality of connection tubes 110 are connected to the water collecting pipe 107, so that each membrane The permeated water extraction nozzle 109 and the water collecting pipe 107 of the cartridge 104 are communicated with each other via the connection tube 110.

  According to this, water to be treated 111 in the tank is filtered by the membrane cartridge 104 while being diffused from the diffuser 102, and the permeated water 106 that has passed through the filtration membrane 105 passes through the permeated water extraction nozzle 109 through the connection tube 110. Then, the water is collected in the water collecting pipe 107 and led out of the tank from the water collecting pipe 107.

  The above membrane separation device 112 is described in, for example, Patent Document 1 below.

Patent No. 3667131

  However, in the above conventional type, the height h from the upper side of the filter plate 108 to the highest point of the connection tube 110 is high, so that the installation space required for installing the membrane separation device 112 in the tank increases in the vertical direction. There's a problem.

  In particular, when a plurality of membrane separation units 101 are stacked one above the other, there is a problem that the overall height of the membrane separation device 112 increases and the installation space increases in the vertical direction.

  An object of this invention is to provide the membrane cartridge and membrane separator which can reduce installation space in an up-down direction.

In order to achieve the above object, the first invention is a flat membrane cartridge that is immersed in a tank and arranged vertically.
A filtration membrane is attached to at least one side of the filter plate,
A permeate extraction part communicating with a permeate flow path formed in the filter plate is provided on the upper side of the filter plate,
The permeated water extraction portion is located at one end portion in the width direction of the filter plate, and is inclined toward the outer side of the filter plate in the horizontal direction with respect to the vertical direction.

  According to this, a membrane cartridge is provided in the tank, a water collecting pipe is provided on one side of the membrane cartridge, one end of the connecting pipe is connected to the permeate outlet of the membrane cartridge, and the other end is connected to the water collecting pipe Then, the permeated water outlet and the water collecting pipe are communicated with each other through the connecting pipe.

  The permeate extraction part is located at one end in the width direction of the filter plate and is inclined outward from the filter plate in the horizontal direction with respect to the vertical direction. The height to the highest point is reduced. Thereby, an installation space can be reduced in the up-down direction.

  In the membrane cartridge according to the second aspect of the present invention, the permeated water extraction portion does not protrude outward from one side end in the width direction of the filter plate.

  According to this, when the membrane cartridge is manufactured while the filter plate is conveyed by a conveyor or the like, the filter plate is conveyed while being guided to the conveyance path by the conveyance guides provided on both sides of the conveyor or the like. At this time, it is possible to prevent the permeated water outlet from coming into contact with the conveyance guide and being damaged.

The membrane cartridge in the third invention is provided with a lifting part for lifting the membrane cartridge on the upper side of the filter plate,
The height from the upper side part of the filter plate to the upper end of the permeate extraction part is lower than the height from the upper side part of the filter plate to the upper end of the lifting part.

  According to this, when the membrane cartridge is transported in a box or the like, the upper end of the permeate take-out part is less likely to come into contact with the inner surface of the box, and the permeate take-out part is less likely to be damaged during transport.

The fourth aspect of the present invention is an immersion type membrane separation apparatus comprising the membrane cartridge according to any one of the first to third aspects of the invention,
A membrane separation unit, and a diffuser provided below the membrane separation unit;
The membrane separation unit has a plurality of membrane cartridges arranged at a predetermined interval in the thickness direction, and a water collecting pipe that collects permeated water that passes through the filtration membrane of each membrane cartridge and is taken out from the permeated water outlet. ,
The water collecting pipe is provided on one side of the plurality of membrane cartridges,
One end of each of the plurality of connecting pipes is connected to the permeated water outlet of each membrane cartridge, and the other end of the plurality of connecting pipes is connected to the water collecting pipe. Communicates via a connecting pipe,
The water collecting pipe is located lower than the permeate outlet.

  According to this, while being diffused from the diffuser, the water to be treated in the tank is filtered by the membrane cartridge, and the permeated water that has permeated through the filtration membrane is collected from the permeated water outlet through the connecting pipe to the water collecting pipe, It is led out of the tank from the water collection pipe.

  Since the water collection pipe is located below the permeate outlet, the height from the upper side of the filter plate to the highest point of the connection pipe is further reduced, thereby further reducing the installation space in the vertical direction. Can do.

In the membrane separation apparatus according to the fifth aspect of the invention, the membrane separation unit has a membrane case that is open at the top and bottom,
A plurality of membrane cartridges are provided in the membrane case,
The water collecting pipe is provided on the outer upper part of the membrane case,
The connecting pipe is drawn from the inside of the membrane case to the outside of the membrane case.

In the membrane separation apparatus according to the sixth invention, a plurality of membrane separation units are stacked one above the other.
An air diffuser is provided below the lowermost membrane separation unit.

  According to this, since the overall height of the membrane separation device is reduced, the installation space can be reduced in the vertical direction.

  In the membrane separation apparatus according to the seventh aspect of the invention, the connecting pipe of the lower membrane separation unit is drawn out from between the lower membrane separation unit and the upper membrane separation unit.

In the membrane separation device according to the eighth aspect of the invention, the upward flow generated by the air diffused from the air diffuser flows between the plurality of membrane cartridges,
The connecting pipe is located outside the region where the upward flow is generated.

  According to this, the adhering matter adhering to the surface of the filtration membrane of the membrane cartridge is released by the upward flow, and thus it is possible to prevent the adhering matter from being deposited on the membrane surface.

  In addition, since the connecting pipe is located outside the region where the upward flow occurs, the upward flow is not hindered by the connecting pipe, and the residue in the water to be treated does not adhere to the connecting pipe. Counterflow flows substantially uniformly between the membrane cartridges. As a result, deposition of deposits can be prevented over the entire film surface.

  As described above, according to the present invention, the installation space can be reduced in the vertical direction.

It is sectional drawing of the front of the membrane separator in the 1st Embodiment of this invention. It is a right side view of the membrane separator. It is sectional drawing of the front of the membrane separation unit of a membrane separator. It is a front view of the membrane cartridge with which a membrane separator is provided. It is an enlarged view of the filter plate surface in the permeated water extraction nozzle formation part of a membrane cartridge. It is a XX arrow line view in FIG. 2 is a plan view of the membrane separation unit. FIG. It is a XX arrow line view in FIG. It is a partially expanded sectional view of a membrane separation unit. It is an enlarged view of the permeated water extraction nozzle formation part of the membrane cartridge in the 2nd Embodiment of this invention. It is sectional drawing of the front of the conventional membrane separator.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
In the first embodiment, as shown in FIG. 1, reference numeral 1 denotes an immersion type membrane separation apparatus installed in the tank 2. The membrane separation device 1 includes a plurality of membrane separation units 3 and 4 stacked one above the other and an air diffuser 6 provided below the lower membrane separation unit 4.

  The upper membrane separation unit 3 permeates through a rectangular tubular membrane case 8 that is open at the top and bottom, a plurality of flat membrane cartridges 9 provided in the membrane case 8, and the filtration membrane 10 of each membrane cartridge 9. And a water collecting pipe 13 for collecting the permeated water 12 taken out from the permeated water outlet nozzle 11 (an example of a permeated water outlet).

  As shown in FIG. 4, the membrane cartridge 9 has a resin-made rectangular filter plate 16 and filtration membranes 10 attached to both front and back surfaces of the filter plate 16. As shown in FIGS. 4 to 6, the filter plate 16 is formed with a groove-like permeate flow path 18 through which the permeate 12 that has passed through the filtration membrane 10 flows. The permeate flow path 18 is formed on both front and back surfaces of the filter plate 16 and is formed on both front and back surfaces of the filter plate 16 in the height direction of the membrane cartridge 9. A plurality of vertical permeate flow channels 20 that are long in H, and a penetrating permeate flow channel 21 that penetrates the upper lateral permeate flow channel 19 on the surface of the filter plate 16 and the upper lateral permeate flow channel 19 on the back surface. The upper lateral permeate flow channel 19 is located above the filter plate 16, and the upper end of each vertical permeate flow channel 20 communicates with the upper lateral permeate flow channel 19.

  The permeate water discharge nozzle 11 is provided on the upper side of the filter plate 16 and is located at one end in the width direction W of the filter plate 16, and has a permeate water discharge hole 23 communicating with the through-permeate water flow channel 21. However, it is inclined outwardly of the filter plate 16 toward the horizontal direction with respect to the vertical direction. In addition, the inclination angle A of the permeated water extraction nozzle 11 with respect to the vertical axis 25 is set to exceed 45 ° and less than 90 °.

  A lifting portion 27 for lifting the membrane cartridge 9 is provided at the center of the upper side portion of the filter plate 16. The lifting part 27 has a lifting hole 28 penetrating therethrough.

  The height h1 from the upper side of the filter plate 16 to the upper end of the permeate take-out nozzle 11 is lower than the height h2 from the upper side of the filter plate 16 to the upper end of the lifting portion 27. Moreover, the front-end | tip part of the permeated water extraction nozzle 11 has shifted | deviated from the one side end 16a (right side end) in the width direction W of the filter plate 16 to the other side (left side) of the opposite side slightly, and, thereby, filtration The plate 16 does not protrude outward from the one end 16a.

  As shown in FIGS. 7 and 8, the membrane cartridge 9 is arranged in the vertical direction in the membrane case 8 and is arranged with a predetermined interval B in the thickness direction T.

  The membrane case 8 is a rectangular tube-shaped member, and the vertical columns 31 to 34 erected at the four corners of the front, rear, left and right, the right side panel 35 provided between the pair of right and left vertical columns 31, 32, The left side panel 36 provided between the left and right pair of front and rear vertical columns 33, 34, the front panel 37 provided between the front left and right pair of vertical columns 31 and 33, and the rear left and right pair of vertical columns. And a rear panel 38 provided between the columns 32 and 34.

  As shown in FIGS. 2, 7, and 9, the water collection pipe 13 is attached between the pair of front and rear vertical columns 31 and 32, and is provided on the outer upper portion of the membrane case 8 and accommodated in the membrane case 8. The membrane cartridge 9 is positioned lower than the permeated water discharge nozzle 11. As shown in FIGS. 1 to 3, 7, and 9, an opening 40 communicating with the inside and the outside of the membrane case 8 is provided above the right side panel 35. It is formed between 32.

  The permeate discharge nozzle 11 and the water collecting pipe 13 of each membrane cartridge 9 communicate with each other via a soft resin connecting tube 42 (an example of a connecting pipe) that can be bent in an arc shape. That is, one end portion of the plurality of connection tubes 42 is connected to the permeated water extraction nozzle 11 of each membrane cartridge 9, and the other end portion is connected to the water collecting pipe 13. These connection tubes 42 are drawn from the inside of the membrane case 8 to the outside of the membrane case 8 through the opening 40.

  As shown in FIGS. 1 and 3, a pair of left and right support members 44 that support the membrane cartridges 9 from below are provided at lower portions of the inner surfaces of the left and right side panels 35 and 36. As shown in FIGS. 3, 8, and 9, slit members 46 having a plurality of grooves 45 in the vertical direction are provided on the inner surfaces of the side panels 35 and 36, respectively. Both side portions of each membrane cartridge 9 are inserted into the grooves 45 of both slit members 46 from above, whereby the interval between each membrane cartridge 9 is maintained at a predetermined interval B.

  As shown in FIGS. 3, 7, and 9, a first presser device 48 that presses the membrane cartridge 9 in the lateral direction C and a second presser device 49 that presses the membrane cartridge 9 in the downward direction D are provided on the upper part of the membrane case 8. Is provided. The first pressing device 48 includes an L-shaped first mounting frame 51 attached to the upper end of the right side panel 35, and a first pressing member 52 provided in the first mounting frame 51.

  The first mounting frame 51 is detachably attached to the side panel 35 via bolts and nuts 53. The first pressing member 52 is a comb-like member made of an elastic material such as rubber, and has a plurality of slits 54 (see FIG. 7). One upper end (right end) of each membrane cartridge 9 is fitted into the slit 54 of the first pressing member 52, and the upper portion of each membrane cartridge 9 is turned sideways C (for example, the other side (left side) by the first pressing member 52. ))).

  As shown in FIGS. 3 and 7, the second presser device 49 includes a second attachment frame 57 attached to the upper end of the left side panel 36, and a second presser member 58 provided in the second attachment frame 57. have. The second mounting frame 57 is detachable from the side panel 36 via bolts and nuts 59. The second presser member 58 is a comb-like member made of an elastic material such as rubber, and has a plurality of slits (not shown). The upper side of the other end (left end) of each membrane cartridge 9 is fitted into the slit of the second pressing member 58, and the upper portion of each membrane cartridge 9 is pressed downward D by the second pressing member 58.

  As shown in FIGS. 1 and 2, the lower membrane separation unit 4 has the same configuration as the upper membrane separation unit 3 described above. The lower ends of the vertical supports 31 to 34 of the membrane case 8 of the upper membrane separation unit 3 are placed on the upper ends of the vertical supports 31 to 34 of the membrane case 8 of the lower membrane separation unit 4.

  In addition, each water collection pipe 13 is connected to a lead-out pipe line 63 for leading the permeated water 12 collected in the water collection pipe 13 to the outside of the tank. The outlet pipe 63 is provided with a pump (not shown).

  The air diffuser 6 has an air diffuser case 70 and an air diffuser 71 provided in the air diffuser case 70. The air diffuser 71 has a plurality of air discharge holes 72, and an air supply line 73 that supplies air to the air diffuser 71 from outside the tank is connected to the air diffuser 71.

  Hereinafter, the operation of the above configuration will be described.

  As shown in FIGS. 5 and 9, the permeate discharge nozzle 11 is located at one side end (right end) in the width direction W of the filter plate 16, and is a filter plate toward the horizontal direction with respect to the vertical direction. Because the connection tube 42 is inclined outwardly, the height h3 from the upper side of the filter plate 16 to the highest point of the connection tube 42 is reduced. Moreover, since the water collection pipe | tube 13 is located in the lower rank rather than the permeated water extraction nozzle 11, the said height h3 is further reduced.

  Thereby, the space 76 (see FIG. 1) between the upper side of the membrane cartridge 9 of the lower membrane separation unit 4 and the lower end of the membrane case 8 of the upper membrane separation unit 3 can be shortened. The overall height HA of the separation apparatus 1 is reduced, and the installation space for the membrane separation apparatus 1 can be reduced in the vertical direction.

  As shown in FIG. 1, when air is supplied from the air supply pipe 73 to the air diffuser 71, air is discharged from the air discharge holes 72 of the air diffuser 71 and floats as many bubbles 80. As a result, an upward flow 77 is generated in the tank 2, and the upward flow 77 flows between the membrane cartridges 9 in the lower membrane separation unit 4 from the diffuser case 70, and further the upper membrane separation. It flows between the membrane cartridges 9 in the unit 3. Thereby, since the adhering matter adhering to the surface of the filtration membrane 10 of the membrane cartridge 9 is separated by the upward flow 77, it is possible to prevent the adhering matter from being deposited on the membrane surface.

  Further, the permeated water discharge nozzle 11 is located at one end in the width direction W of the filter plate 16 of the membrane cartridge 9, and the connection tube 42 is located outside the region 78 where the upward flow 77 is generated. The flow 77 is not obstructed by the connection tube 42, and the residue in the treatment target water 79 (raw water) in the tank 2 does not adhere to the connection tube 42, and the upward flow 77 is almost uniform between the membrane cartridges 9. Flowing into. As a result, deposition of deposits can be prevented over the entire film surface.

  Further, the water to be treated 79 (raw water) in the tank 2 is filtered by the membrane cartridge 9, and the permeated water 12 that has passed through the filtration membrane 10 as shown in FIGS. And flows into the upper lateral permeate flow channel 19 from the upper lateral permeate flow channel 19 through the permeate permeate flow channel 21, the permeate take-out hole 23 of the permeate take-out nozzle 11, and the connection tube 42. The water pipe 13 flows through the outlet pipe 63 and is led out of the tank.

  As shown in FIGS. 3 and 9, the membrane cartridge 9 is pressed in the lateral direction C by the first pressing device 48 and is pressed in the downward direction D by the second pressing device 49. For this reason, it is possible to prevent the membrane cartridge 9 from being lifted or vibrated by the upward flow 77.

  Further, in the manufacturing plant of the membrane separation apparatus 1, when the membrane cartridge 9 is manufactured while the filter plate 16 is being transported by a transport device such as a roller conveyor 82, as shown in FIG. It is conveyed while being guided to the conveyance path 84 by the conveyance guides 83 provided on both sides. At this time, since the tip of the permeate take-out nozzle 11 does not protrude outward from the left and right end 16a of the filter plate 16, it is possible to prevent the permeate take-out nozzle 11 from coming into contact with the transport guide 83 and being damaged. it can.

  Further, as shown in FIG. 5, the height h1 from the upper side of the filter plate 16 to the upper end of the permeate discharge nozzle 11 is lower than the height h2 from the upper side of the filter plate 16 to the upper end of the lifting portion 27. When the manufactured membrane cartridge 9 is transported in a box or the like, the upper end of the permeate take-out nozzle 11 is less likely to contact the inner surface of the box, and the permeate take-out nozzle 11 is less likely to be damaged during transport. .

  In the first embodiment, as shown in FIG. 5, the inclination angle A of the permeated water discharge nozzle 11 is set within a range of 45 ° <A <90 °, but 0 ° <A It may be set within a range of <90 °.

(Second Embodiment)
In the first embodiment described above, as shown in FIG. 5, the permeated water discharge nozzle 11 is inclined at an inclination angle A with respect to the vertical axis 25, but in the second embodiment, as shown in FIG. 10. As shown, the permeated water extraction nozzle 11 may be in a horizontal direction without being inclined (in other words, the inclination angle A may be 90 °).

  According to this, the same operation and effect as the first embodiment can be obtained.

  In each of the above embodiments, as shown in FIG. 1, the membrane separation units 3 and 4 are stacked in two upper and lower stages, but they may be stacked in a plurality of stages of three or more.

  In each of the above embodiments, as shown in FIG. 4, the permeate discharge nozzle 11 is provided at the right end portion of the filter plate 16, but may be provided at the left end portion on the opposite side.

  In each said embodiment, although the filtration membrane 10 is attached to the front and back both surfaces of the filter plate 16, you may attach to only one side.

DESCRIPTION OF SYMBOLS 1 Membrane separation apparatus 2 Tank 3, 4 Membrane separation unit 6 Air diffuser 8 Membrane case 9 Membrane cartridge 10 Filtration membrane 11 Permeated water extraction nozzle (permeated water extraction section)
12 Permeated water 13 Water collecting pipe 16 Filter plate 16a One side end 18 Permeated water flow path 27 Lifting part 42 Connection tube (connection pipe)
77 Upward flow 78 Region where upward flow occurs B Predetermined interval T Thickness direction W Width direction h1 Height from the upper side of the filter plate to the upper end of the permeate discharge nozzle h2 Upper end of the filter plate from the upper side of the filter plate Up to

Claims (8)

It is a flat membrane cartridge that is immersed in a tank and arranged vertically.
A filtration membrane is attached to at least one side of the filter plate,
A permeate extraction part communicating with a permeate flow path formed in the filter plate is provided on the upper side of the filter plate,
The membrane cartridge is characterized in that the permeate outlet is located at one end in the width direction of the filter plate and is inclined outwardly of the filter plate in the horizontal direction with respect to the vertical direction. 2. The membrane cartridge according to claim 1, wherein the permeated water extraction portion does not protrude outward from one side end in the width direction of the filter plate. A lifting part for lifting the membrane cartridge is provided on the upper side of the filter plate,
The membrane cartridge according to claim 1 or 2, wherein the height from the upper side of the filter plate to the upper end of the permeate take-out portion is lower than the height from the upper side of the filter plate to the upper end of the lifting portion. An immersion type membrane separation apparatus comprising the membrane cartridge according to any one of claims 1 to 3,
A membrane separation unit, and a diffuser provided below the membrane separation unit;
The membrane separation unit has a plurality of membrane cartridges arranged at a predetermined interval in the thickness direction, and a water collecting pipe that collects permeated water that passes through the filtration membrane of each membrane cartridge and is taken out from the permeated water outlet. ,
The water collecting pipe is provided on one side of the plurality of membrane cartridges,
One end of each of the plurality of connecting pipes is connected to the permeated water outlet of each membrane cartridge, and the other end of the plurality of connecting pipes is connected to the water collecting pipe. Communicates via a connecting pipe,
A membrane separator characterized in that the water collecting pipe is positioned lower than the permeate outlet. The membrane separation unit has a membrane case open at the top and bottom,
A plurality of membrane cartridges are provided in the membrane case,
The water collecting pipe is provided on the outer upper part of the membrane case,
The membrane separation device according to claim 4, wherein the connecting pipe is drawn out from the inside of the membrane case to the outside of the membrane case. Multiple membrane separation units are stacked one above the other,
6. The membrane separation apparatus according to claim 4, wherein the diffuser is provided below the lowermost membrane separation unit. 7. The membrane separation apparatus according to claim 6, wherein the connecting pipe of the lower membrane separation unit is pulled out from between the lower membrane separation unit and the upper membrane separation unit. The upward flow generated by the diffuser from the diffuser flows between the plurality of membrane cartridges,
The membrane separator according to any one of claims 4 to 7, wherein the connecting pipe is located outside a region where upward flow is generated.

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