JP6624984B2 - Membrane separation device, extension membrane case, membrane separation device set, and method of replacing membrane element - Google Patents

Description

  The present invention relates to a membrane separation device, a membrane case for extension, a membrane separation device set, and a method for replacing a membrane element, which are used, for example, when treating wastewater such as sewage with activated sludge.

  Conventionally, as this type of membrane separation device, there is a membrane separation device in which a plurality of membrane elements 202 are arranged in a vertical direction and horizontally in a membrane case 201 as shown in FIG. A diffuser case 203 is provided below the membrane case 201, and a diffuser tube 204 is provided in the diffuser case 203.

  According to this, the water to be treated (mixed liquid of activated sludge or the like) in the treatment tank is filtered by the membrane element 202, and the permeated water that has passed through the filtration membrane of the membrane element 202 is taken out of the treatment tank.

The above-mentioned membrane separation device is described in, for example, Patent Document 1 below.
Here, in order to improve the throughput of the water to be treated by the membrane separation device, it is necessary to increase the membrane area of the membrane element 202. For this purpose, the existing membrane element housed in the membrane case 201 is required. It is conceivable to replace 202 (hereinafter referred to as a first membrane element 202) with a longer membrane element 206 (hereinafter referred to as a second membrane element 206).

Patent No. 3328149

  However, in the above-described conventional type, the width of the second membrane element 206 is the same as the width of the first membrane element 202, but the height of the second membrane element 206 is larger than the height of the first membrane element 202. Therefore, the existing membrane case 201 has to be replaced with a new membrane case (not shown) having a height corresponding to the height of the second membrane element 206. For this reason, there is a problem that the existing membrane case 201 is wasted and extra cost is generated.

  The present invention provides a membrane separation device, an extension membrane case, a membrane separation device set, and a method for replacing a membrane element that can effectively use an existing membrane case when replacing a membrane element with a vertically elongated membrane element. With the goal.

In order to achieve the above object, the membrane separation device according to the first aspect of the present invention comprises a first membrane case having an open top and bottom, and an extension membrane case detachably connected to the first membrane case. Consists of a membrane case,
The first membrane case alone can store a plurality of flat first membrane elements in a state in which the first membrane elements are vertically arranged in a horizontal direction,
In the second membrane case, a plurality of flat-type second membrane elements that are longer than the first membrane element and longer than the first membrane case are housed in a horizontal orientation in a vertical posture. ,
A plurality of grooves are provided inside the second membrane case,
By inserting the side of the second membrane element into the groove, the plurality of second membrane elements are arranged at predetermined intervals.

  According to this, in a state where the extension membrane case is detached from the first membrane case, the first membrane element is stored in the first membrane case, and the water to be treated is filtered by the first membrane element. it can. At this time, the first membrane elements are arranged in the first membrane case at predetermined intervals by inserting the side portions of the first membrane elements into the grooves.

  In order to improve the throughput of the water to be treated by such a membrane separation device, the first membrane element is replaced with a second membrane element that is longer and longer than the first membrane element.

  At this time, by connecting the extension membrane case to the first membrane case and assembling the second membrane case, the first membrane case is extended upward, and the second membrane element is moved inside the second membrane case. And the water to be treated can be filtered by the second membrane element.

  As a result, the existing first membrane case can be effectively used, and an increase in cost required for replacing the membrane element can be suppressed. In addition, the side part of the second membrane element is inserted into the groove inside the second membrane case, so that the second membrane element is arranged in the second membrane case at a predetermined interval. .

In the membrane separation device according to the second invention, the groove is provided inside the extension membrane case.
According to this, the second membrane case is assembled by connecting the extension membrane case to the first membrane case, and the second membrane element is housed in the second membrane case. At this time, the side of the second membrane element is inserted into the groove in the extension membrane case, so that the second membrane element is maintained at a predetermined interval over the entire area in the height direction. Are arranged in a membrane case.

In the membrane separation device according to the third aspect, the extension membrane case can be divided into a plurality of divided case bodies in a width direction orthogonal to the arrangement direction of the second membrane elements.
The groove is provided inside the split case body.

  According to this, when the second membrane element is taken out of the second membrane case, solid matter such as sludge is deposited in the gap between the second membrane element and the groove or in the vicinity thereof, or the adjacent second membrane element is removed. Even in the case where the space between the membrane elements is closed by a solid substance such as sludge (inter-membrane blockage), the extended membrane case is removed from the first membrane case and divided into divided case bodies, whereby the divided case body is separated. The groove of the second membrane element is separated from the side of the second membrane element in the width direction, so that the second membrane element can be easily taken out.

In addition, the height of the working space required for the lifting operation for pulling the second membrane element above the second membrane case can be reduced.
According to a fourth aspect of the present invention, there is provided a membrane separation apparatus in which a plurality of flat first membrane elements are arranged in a vertical posture in a horizontal direction in a first membrane case having an open top and bottom. Is replaced with a second membrane element that is longer than the first membrane element and longer than the first membrane case, and is an extension membrane case that is used to extend the first membrane case. So,
The top and bottom are open,
It is detachable from the first membrane case.

  According to this, when replacing the first membrane element housed in the first membrane case with the second membrane element, the first membrane element is taken out of the first membrane case and the first membrane case is taken out. The second membrane case may be assembled by connecting the extension membrane case to the second membrane case, and the second membrane element may be housed in the second membrane case.

As a result, the existing first membrane case can be effectively used, and an increase in cost required for replacing the membrane element can be suppressed.
In the extension membrane case according to the fifth invention, a plurality of grooves are provided inside,
By inserting the side portions of the second membrane element into the grooves, the plurality of second membrane elements are arranged at predetermined intervals.

The extension membrane case according to the sixth aspect of the invention can be divided into a plurality of divided case bodies in a width direction orthogonal to the arrangement direction of the second membrane elements.
According to this, when the second membrane element is taken out of the second membrane case, solid matter such as sludge is deposited in the gap between the second membrane element and the groove or in the vicinity thereof, or the adjacent second membrane element is removed. Even when the space between the membrane elements is closed by solid matter such as sludge (inter-membrane blockage), the extension membrane case is detached from the first membrane case and divided into divided case bodies, whereby the divided case body is formed. The groove of the second membrane element is separated from the side of the second membrane element in the width direction, so that the second membrane element can be easily taken out.

In addition, the height of the working space required for the lifting operation for pulling the second membrane element above the second membrane case can be reduced.
The membrane separation device set according to the seventh aspect of the present invention includes: a first membrane case having upper and lower openings;
A plurality of flat first membrane elements that can be housed in the first membrane case in a vertical orientation and arranged in the horizontal direction;
An extension membrane case that is open at the top and bottom and that can be connected to the top of the first membrane case;
A plurality of flat second membrane elements that are longer than the first membrane element and longer than the first membrane case ,
The second membrane element is housed in a second membrane case formed by connecting the extension membrane case to the first membrane case, arranged in a vertical posture in the horizontal direction.

  According to this, by storing a plurality of first membrane elements in the first membrane case, the water to be treated can be filtered by the first membrane element. In order to improve the throughput of the water to be treated by such a membrane separation device, the first membrane element is replaced with a second membrane element that is longer than the first membrane element.

  At this time, the second membrane case is assembled by connecting the extension membrane case to the first membrane case, the second membrane element is housed in the second membrane case, and the water to be treated is treated by the second membrane element. Can be filtered. As a result, the existing first membrane case can be effectively used, and an increase in cost required for replacing the membrane element can be suppressed.

In the membrane separation device set according to the eighth invention, a plurality of grooves are provided inside the first membrane case and the extension membrane case, respectively.
A side portion of the first membrane element is inserted into a groove in the first membrane case;
The side of the second membrane element is inserted into the groove in the first membrane case and the groove in the extension membrane case.

  According to this, when the plurality of first membrane elements are stored in the first membrane case, the side portions of the first membrane element are inserted into the grooves in the first membrane case, so that these first membrane elements are inserted. The one membrane element is arranged in the first membrane case at a predetermined interval.

  Further, when the plurality of second membrane elements are housed in the second membrane case, the side portions of the second membrane element are inserted into the groove in the first membrane case and the groove in the extension membrane case. Accordingly, these second membrane elements are arranged in the second membrane case at predetermined intervals over the entire area in the height direction.

In the membrane separation device set according to the ninth aspect, the extension membrane case can be divided into a plurality of divided case bodies in a width direction orthogonal to the arrangement direction of the second membrane elements.
The groove is provided inside the split case body.

  According to this, when the second membrane element is taken out of the second membrane case, solid matter such as sludge is deposited in the gap between the second membrane element and the groove or in the vicinity thereof, or the adjacent second membrane element is removed. Even in the case where the space between the membrane elements is closed by a solid substance such as sludge (inter-membrane blockage), the extended membrane case is removed from the first membrane case and divided into divided case bodies, whereby the divided case body is separated. The groove of the second membrane element is separated from the side of the second membrane element in the width direction, so that the second membrane element can be easily taken out.

In addition, the height of the working space required for the lifting operation for pulling the second membrane element above the second membrane case can be reduced.
A tenth invention is a method for replacing a membrane element of a membrane separation device using the extension membrane case according to any one of the fourth to sixth inventions,
Removing the first membrane element from inside the first membrane case,
Connecting the extension membrane case to the first membrane case to assemble the second membrane case,
The second membrane element is housed in the second membrane case.

In the membrane separation device according to the eleventh aspect of the present invention, a plurality of flat membrane elements are housed in a membrane case having an open top and bottom in a horizontal orientation in a vertical posture.
Multiple grooves are provided inside the membrane case,
A plurality of membrane elements are arranged at predetermined intervals by inserting the side portion of the membrane element into the groove,
Film case, the height in the range of one membrane element is present, Ri divisible der vertically plurality,
The membrane element is longer than the vertically divided membrane case.

In the membrane separation device according to the twelfth aspect, the membrane case can be separated into a lower membrane case and an upper membrane case provided above the lower membrane case,
The upper membrane case can be divided into a plurality of divided case bodies in a width direction orthogonal to the arrangement direction of the membrane elements,
The groove is provided inside the split case body.

  According to this, when the membrane element is taken out of the membrane case, the upper membrane case is detached from the lower membrane case and divided into divided case bodies, so that the work space required for pulling up the membrane element above the membrane case is required. Can be kept low.

  As described above, according to the present invention, when the first membrane element is replaced with the vertically elongated second membrane element, the existing first membrane case can be effectively used, and thus the cost required for replacing the membrane element. Increase can be suppressed.

FIG. 1 is a vertical sectional view of a membrane separation device according to a first embodiment of the present invention, in which a first membrane element is incorporated. FIG. 3 is a plan view of the same membrane separation device. FIG. 2 is a view taken along the line XX in FIG. 1. FIG. 2 is a view taken in the direction of arrows YY in FIG. 1. FIG. 3 is an exploded view of a holding device of the membrane separation device. FIG. 3 is a diagram of a holding device of the membrane separation device and an upper portion of the membrane element. FIG. 3 is a longitudinal sectional view of the same membrane separation device, in which an extension membrane case is attached, and a second membrane element is incorporated. FIG. 3 is a longitudinal sectional view of an extension membrane case of the membrane separation device. FIG. 3 is a front view of the same membrane separation device, showing a state where a second membrane element is taken out. It is a front view of a membrane separation device in a 2nd embodiment of the present invention. FIG. 11 is a view taken along the line XX in FIG. 10. FIG. 3 is a front view of the same membrane separation device, showing a state where a second membrane element is taken out. It is the figure which divided the extension membrane case of the membrane separation device into the divided case body. It is a cross-sectional view of a membrane separation device in a third embodiment of the present invention. FIG. 3 is a partially cutaway front view of the same membrane separator. It is an expanded sectional view of the connection means which connects the division | segmentation case piece of the membrane separation apparatus. FIG. 3 is an enlarged cross-sectional view of a case connecting means for connecting an extension membrane case and a first membrane case 2 of the membrane separation device. FIG. 3 is a cross-sectional view of the same, showing a state in which both divided case pieces at one end are slid in a direction away from each other. FIG. 4 is a partially cutaway front view of the membrane separation device, showing a state where both divided case pieces at one end are slid in a direction away from each other. FIG. 3 is a cross-sectional view of the same membrane separator, showing a state in which both divided case pieces in an intermediate portion are slid in a direction away from each other. It is a longitudinal section of an extension membrane case and a press device of a membrane separation device in a 4th embodiment of the present invention. It is a partially cutaway front view of the membrane separation device in a 5th embodiment of the present invention. FIG. 4 is a partially cutaway front view of the membrane separation device, showing a state where both divided case pieces at one end are slid in a direction away from each other. It is a figure of the conventional membrane separation device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First Embodiment)
In the first embodiment, as shown in FIGS. 1 to 3, reference numeral 1 denotes a first membrane separation device used when treating wastewater such as sewage with activated sludge. The first membrane separation device 1 is provided below the first membrane case 2, a plurality of first membrane elements 3 housed in the first membrane case 2, and the first membrane case 2. It has an air diffuser case 4 and an air diffuser 5 provided in the air diffuser case 4.

  The first membrane case 2 is a square case with an open top and bottom, a pair of front and rear panel bodies 7 and 8, a pair of left and right side panels 9 and 10, and a plate-like upper flange provided at an upper end portion. 11 are provided.

  The first membrane element 3 is a flat type, has a square filter plate 12, and filter membranes 13 provided on both front and back surfaces of the filter plate 12, and is arranged in a horizontal direction in a vertical posture. I have. The permeated water that has passed through the filtration membrane 13 is collected in the collecting pipe 14. In addition, each first membrane element 3 and the collecting pipe 14 are communicated via a tube 15.

The inside of the air diffuser case 4 communicates with the inside of the first membrane case 2. The air diffuser 5 has a plurality of air diffusers 18, and air is blown out from a number of outlets of the air diffusers 18.
A pair of holding devices 20 for preventing the first membrane element 3 from floating are provided above the first membrane case 2. In addition, a pair of support members 31 that support the first membrane element 3 from below and prevent the first membrane element 3 from dropping are provided below the first membrane case 2.

  As shown in FIGS. 4 to 6, the pressing device 20 includes a pressing plate 21 and a comb-shaped pressing member 22 made of an elastic material. The holding plate 21 is detachably connected to the upper flange 11 of the first membrane case 2 by a plurality of bolts 23 and nuts 24. The pressing member 22 has a plurality of irregularities, and fits the upper side of the filter plate 12 of the plurality of first membrane elements 3 into the concave portion, and sandwiches the upper side of the filter plate 12 and the pressing plate 21. Have been.

  The holding plate 21 has a plurality of long holes 25 that are long in the width direction B perpendicular to the arrangement direction A of the first membrane elements 3. Bolts 23 are inserted into these elongated holes 25. The bolt 23 is attached to the upper flange 11 of the first membrane case 2 by welding or the like.

  As shown in FIGS. 1, 3, and 5, a pair of interval holding members 27 that maintain the interval between the first membrane elements 3 at a predetermined interval are provided in the first membrane case 2. These spacing members 27 are comb-shaped members having a plurality of vertically long grooves 28, and are provided on the inner surfaces of the side panels 9 and 10. The left and right sides of the first membrane element 3 are inserted into the groove 28 from above.

  As shown in FIG. 7, reference numeral 50 denotes a second membrane separation device. The first membrane element 3 of the first membrane separation device 1 is replaced with a second membrane element 52 which is longer than the first membrane element 3. It has been replaced.

  That is, the second membrane separation device 50 is provided below the second membrane case 51, the plurality of second membrane elements 52 housed in the second membrane case 51, and the second membrane case 51. And a diffuser 5 provided in the diffuser case 4. The air diffuser case 4 and the air diffuser 5 are the same as those of the first membrane separation device 1.

  The second membrane case 51 can be divided into a lower first membrane case 2 (an example of a lower membrane case) and an upper extension membrane case 53 (an example of an upper membrane case). That is, the first membrane case 2 is the same as that of the first membrane separation device 1, and the extension membrane case 53 is detachably connected to the upper portion of the first membrane case 2.

  As shown in FIG. 2, FIG. 3, FIG. 8, and FIG. 9, the extension membrane case 53 is a rectangular case with an open top and bottom, and a pair of front and rear extension panels 55 and 56 and a pair of left and right extension panels. Side panels 57, 58, a plate-shaped lower flange 59 provided at a lower end, and a plate-shaped upper flange 60 provided at an upper end. The upper flange 11 of the first membrane case 2 and the lower flange 59 of the extension membrane case 53 are detachably connected by a plurality of bolts 23 and nuts 62.

  As shown in FIGS. 7 to 9, the upper flange 11, the lower flange 59, the bolt 23 and the nut 62 constitute a case connecting means 67. A through hole 63 is formed in the lower flange 59 of the extension membrane case 53, and the bolt 23 is inserted into the through hole 63 from below.

  The second membrane element 52 is a flat element that is higher in height and longer than the first membrane element 3 and is vertically arranged in the second membrane case 51 in a horizontal orientation. I have. The width W2 of the second membrane element 52 (see FIG. 7) is the same as the width W1 of the first membrane element 3 (see FIG. 1), but the height H2 of the second membrane element 52 (see FIG. 1). 7) is higher than the height H1 of the first membrane element 3 (see FIG. 1).

  The upper flange 60 of the extension membrane case 53 is provided with a pair of holding devices 20 for preventing the second membrane element 52 from floating. The holding device 20 is the same as that of the first membrane separation device 1.

  In the extension membrane case 53, a pair of extension interval holding members 64 for keeping the interval between the second membrane elements 52 at a predetermined interval is provided. Each of the extension interval holding members 64 is a comb-shaped member having a plurality of vertically long grooves 65, and is provided on the inner surfaces of the extension side panels 57 and 58.

  Each groove 65 of the extension spacing member 64 in the extension membrane case 53 is continuous with the extension of each groove 28 of the spacing member 27 provided in the first membrane case 2. The left and right sides of the second membrane element 52 are inserted into the groove 28 of the spacing member 27 in the first membrane case 2 and the groove 65 of the extension spacing member 64 in the extension membrane case 53 from above. ing.

  The membrane separation device set 70 is formed by the first membrane case 2, the extension membrane case 53, the first membrane element 3, the second membrane element 52, the air diffusion case 4, the air diffusion device 5, and the holding device 20. It is configured.

Hereinafter, the operation of the above configuration will be described.
As shown in FIG. 1, after the first membrane separation device 1 is installed in the treatment tank, a suction pressure is applied to the secondary side (permeation side) of the filtration membrane 13 of the first membrane element 3, The to-be-processed water in the inside is filtered by the filtration membrane 13. The permeated water obtained by permeating the filtration membrane 13 in this manner flows from each first membrane element 3 through the tube 15 to the collecting pipe 14, and is taken out of the collecting pipe 14 to the outside of the treatment tank.

  At this time, by blowing out air from the air diffuser 18, a large number of bubbles 68 rise in the first membrane case 2 from inside the air diffuser case 4 and reach the surface of the water to be treated. Inside, an upward flow 69 flowing upward from below is generated. The membrane surface of the filtration membrane 13 is washed by the bubbles 68 and the upward flow 69.

  In addition, since the first membrane element 3 is held by the holding device 20, it is possible to prevent the first membrane element 3 from floating. Further, since the left and right sides of the first membrane element 3 are inserted into the grooves 28 of the spacing member 27, these first membrane elements 3 are kept in the first membrane case 2 at a predetermined interval. Is arranged.

  In order to improve the throughput of the water to be treated, it is necessary to replace the first membrane element 3 of the existing first membrane separation device 1 with a second membrane element 52. A method for replacing such a membrane element will be described below.

  First, the filtration operation of the first membrane separation device 1 and the air diffusion of the air diffuser 5 are stopped, and as shown in FIG. 5, the nut 24 of the holding device 20 is removed from the bolt 23, and the two holding plates 21 are removed. After being removed from the first membrane case 2, the holding member 22 is removed from the upper side of the first membrane element 3.

  Next, the first membrane element 3 is pulled up and taken out above the first membrane case 2, and then, as shown in FIGS. 8 and 9, the nut 62 is screwed into the bolt 23 to extend the membrane case 53 for extension. Is connected to the upper part of the first membrane case 2, and the second membrane case 51 is assembled.

  Next, the second membrane element 52 is inserted into the second membrane case 51 from above. At this time, as shown in FIG. 7, the left and right sides of the second membrane element 52 are aligned with the groove 28 of the spacing member 27 in the first membrane case 2 and the extension spacing in the extension membrane case 53. It is inserted into the groove 65 of the member 64.

  Thereafter, the holding member 22 is fitted into the upper side of the second membrane element 52, and both holding plates 21 are attached to the upper flange 60 of the extension membrane case 53 using the bolts 23 and the nuts 24. Thus, the first membrane element 3 can be replaced with the second membrane element 52.

  By connecting the extension membrane case 53 to the first membrane case 2 and assembling the second membrane case 51 as described above, the first membrane case 2 is extended upward and the second membrane case 2 having a high height is extended. The membrane element 52 is housed in the second membrane case 51, and the water to be treated can be filtered by the second membrane element 52.

  As a result, the existing first membrane case 2 can be effectively used, and an increase in cost required for replacing the first membrane element 3 with the second membrane element 52 can be suppressed. The left and right sides of the second membrane element 52 are inserted into the grooves 28 and 65, so that the second membrane elements 52 are arranged in the second membrane case 51 at a predetermined interval. You.

Further, since the second membrane element 52 is held by the holding device 20, the second membrane element 52 can be prevented from floating.
As shown in FIG. 9, when taking out the second membrane element 52 upward from the inside of the second membrane case 51, loosen the nut 24 of the holding device 20 and move the holding plate 21 along the long hole 25. It is slid in the width direction B and retracted from above the second membrane element 52 to the outside. Thereafter, by pulling up the second membrane element 52, the second membrane element 52 can be easily taken out.

(Second embodiment)
In the second embodiment, as shown in FIGS. 10 to 13, the extension membrane case 53 can be divided into a pair of left and right divided case bodies 75 and 76 in the width direction B of the second membrane element 52. is there.

  Joining plates 77a, 77b, 78a, 78b are provided at both ends of the divided case bodies 75, 76 in the arrangement direction A of the second membrane elements 52, respectively. Of these, the joining plates 77a and 77b are vertically attached to the front extension panel body 55 and the rear extension panel body 56 of one of the split case bodies 75. The joining plates 78a and 78b are vertically attached to the front extension panel 55 and the rear extension panel 56 of the other split case body 76.

  By joining the joining plates 77a and 77b of one divided case body 75 and the joining plates 78a and 78b of the other divided case body 76 with a plurality of bolts 79 and nuts 80, both divided case bodies 75 and 76 are connected to each other. By combining, the extension membrane case 53 is assembled. The joining means 82 is composed of the joining plates 77a, 77b, 78a, 78b, the bolt 79 and the nut 80.

Further, by removing the bolt 79 and the nut 80, the extension membrane case 53 is divided into one divided case body 75 and the other divided case body 76.
One extension interval holding member 64 is provided on the inner surface of the extension side panel 57 of one split case body 75, and the other extension interval holding member 64 is provided on the inner surface of the extension side panel 58 of the other split case body 76. It is provided in.

Hereinafter, the operation of the above configuration will be described.
As shown in FIGS. 12 and 13, when removing the second membrane element 52 from the second membrane case 51, the nut 62 is removed from the bolt 23, and the extension membrane case 53 is removed from the first membrane case 2. Then, the bolt 79 and the nut 80 are removed, and the extension membrane case 53 is divided into one divided case body 75 and the other divided case body 76. As a result, the groove 65 of one of the divided case bodies 75 is separated from the one side of the second membrane element 52 in the width direction B, and the groove 65 of the other divided case body 76 is formed of the second membrane element 52. Separate from the other side in the width direction B. For this reason, solid matter such as sludge is deposited in or near the gap between the second membrane element 52 and the groove 65, or the space between the adjacent second membrane elements 52 is blocked by solid matter such as sludge (membrane). Even when the second membrane element 52 is closed, the second membrane element 52 can be easily pulled out of the second membrane case 51 and taken out.

  Further, as shown in FIG. 12, the height Hs of the working space required for the lifting operation for pulling the second membrane element 52 upward above the second membrane case 51 (that is, by installing the second membrane separation device 50, (The height from the installation surface to the upper end of the second membrane element 52 pulled up) is suppressed lower than that of the second membrane separation device 50 in the first embodiment (see FIG. 9). be able to.

(Third embodiment)
In the third embodiment, as shown in FIGS. 14 to 17, one and the other divided case bodies 75 and 76 are each provided with a plurality of divided case pieces 75 a to 75 in the arrangement direction A of the second membrane element 52. 75c, 76a to 76c.

  Among them, the split case piece 75a at one end on either one of the left and right sides and the split case piece 75c at the intermediate part are connected by the first connecting means 101, and the split case piece 75b at the other end and the split case piece at the intermediate part. 75c is connected by the second connecting means 102. The split case piece 76a at the opposite end and the split case piece 76c at the middle are connected by third connecting means 103, and the split case piece 76b at the other end and the split case piece 76c at the middle are connected to each other. They are connected by fourth connecting means 104.

  The first connecting means 101 includes a connecting plate 106 provided at one end of the divided case piece 75a, a connecting plate 107 provided at one end of the intermediate case piece 75c, and both connecting plates 106, 107. And a plurality of upper and lower bolts 108 and nuts 109 for fastening the nuts.

  The two connecting plates 106 and 107 are respectively formed with a plurality of elongated bolt holes 110 and 111 elongated in the width direction B of the second membrane element 52. Bolts 108 are inserted into these bolt holes 110 and 111.

Further, the second to fourth connecting means 102 to 104 have the same configuration as the first connecting means 101.
The through holes 63 of the lower flange 59 of the extension membrane case 53 are formed for each of the divided case pieces 75a to 75c and 76a to 76c, and are elongated in the width direction B of the second membrane element 52. It is.

The holding device 20 is also divided into a plurality in the arrangement direction A of the second membrane elements 52 so as to correspond to the plurality of divided case pieces 75a to 75c and 76a to 76c.
Hereinafter, the operation of the above configuration will be described.

  For example, when taking out the second membrane element 52 between the pair of divided case pieces 75a and 76a at one end, as shown in FIGS. 18 and 19, the nut 24 of the pressing device 20 of the pair of divided case pieces 75a and 76a is removed. Then, the holding plate 21 is slid in the width direction B along the elongated hole 25 and retracted from above the second membrane element 52 to the outside.

  Next, the bolt 79 and the nut 80 connecting the two divided case pieces 75a and 76a to each other are loosened, and the bolt 23 and the nut 62 connecting the two divided case pieces 75a and 76a and the first membrane case 2 are removed. Then, the bolts 108 and nuts 109 of the first and third connecting means 101 and 103 are loosened, respectively.

  Thereafter, the two split case pieces 75a, 76a are slid in the width direction B of the second membrane element 52 along the through holes 63 and the bolt holes 110, 111, and are opened in a direction away from each other.

  As a result, the groove 65 of the extension interval holding member 64 in one of the divided case pieces 75a is separated from one side of the second membrane element 52 in the width direction B, and the extension in the other divided case piece 76a. The groove 65 of the interval holding member 64 is separated from the other side of the second membrane element 52 in the width direction B. For this reason, solid matter such as sludge accumulates in or near the gap between the second membrane element 52 and the groove 65, or the space between the adjacent second membrane elements 52 is blocked by solid matter such as sludge. The second membrane element 52 can be easily pulled up and taken out from between the pair of divided case pieces 75a, 76a even if it is provided.

  As shown in FIG. 19, when the two split case pieces 75a and 76a are slid in the width direction B of the second membrane element 52 and opened in the direction away from each other, the two split case pieces 75a and 76a Since the slide is performed as described above while being supported by the upper flange 11 of the membrane case 2, the two divided case pieces 75a and 76a can be easily opened.

Similarly, the second membrane element 52 between the pair of divided case pieces 75b and 76b at the other end can be taken out.
Further, when taking out the second membrane element 52 between the pair of divided case pieces 75c and 76c at the intermediate portion, as shown in FIG. 20, the nut 24 of the pressing device 20 of the pair of divided case pieces 75c and 76c is loosened. The holding plate 21 is slid in the width direction B along the long hole 25 and retracted from above the second membrane element 52 to the outside.

  Next, the bolt 23 (see FIG. 17) and the nut 62 (see FIG. 17) connecting the two divided case pieces 75c, 76c and the first membrane case 2 are loosened, and the first to fourth connection means Loosen each of the bolts 108 and nuts 109 of 101 to 104.

  Thereafter, the two divided case pieces 75c, 76c are slid in the width direction B of the second membrane element 52 along the through hole 63 (see FIG. 17) and the bolt holes 110, 111, and are opened in the direction away from each other.

  As a result, the groove 65 of the extension interval holding member 64 in one of the divided case pieces 75c is separated from one side of the second membrane element 52 in the width direction B, and the extension in the other divided case piece 76c. The groove 65 of the interval holding member 64 is separated from the other side of the second membrane element 52 in the width direction B. For this reason, even when the space between the adjacent second membrane elements 52 is closed by solid matter such as sludge, the second membrane element 52 is easily pulled up from between the pair of divided case pieces 75c and 76c. Can be taken out.

  When the second membrane element 52 is taken out, the holding plate 21 of the holding device 20 can be slid and retracted from above the second membrane element 52 to the outside, so that each of the divided case pieces 75a to 75c, It is possible to reduce the amount of sliding in the width direction B of 76 a to 76 c, thereby shortening the length of each of the long through holes 63 and the bolt holes 110 and 111, and Enlargement in the width direction B can be suppressed.

  In the third embodiment, the divided case bodies 75 and 76 can be divided (three divided) into three divided case pieces 75a to 75c and 76a to 76c in the arrangement direction A of the second membrane elements 52, respectively. The configuration is not limited to three divisions, and two or four or more divisions may be made.

(Fourth embodiment)
In the first and second embodiments, as shown in FIGS. 7 and 8, the holding plate 21 is attached to the upper flange 60 of the extension membrane case 53 by a plurality of bolts 23 and nuts 24. As a fourth embodiment, as shown in FIG. 21, the holding plate 21 may be integrally fixed to the upper end of the extension membrane case 53 by welding or the like.

(Fifth embodiment)
In the third embodiment, as shown in FIG. 15, the holding plate 21 is attached to the upper flange 60 of the extension membrane case 53 by a plurality of bolts 23 and nuts 24. However, in the fifth embodiment, as shown in FIG. Alternatively, as shown in FIGS. 22 and 23, the holding plate 21 may be integrally fixed to the upper end portion of the extension membrane case 53 by welding or the like.

  In this case, since the holding plate 21 cannot slide in the width direction B with respect to the divided case pieces 75a to 75c and 76a to 76c, the holding plate 21 is retracted outward from above the second membrane element 52. It is necessary to increase the sliding amount of each of the divided case pieces 75a to 75c and 76a to 76c in the width direction B, and the length of each of the through holes 63 and the bolt holes 110 and 111, which are long holes, is required. The length is longer than that of the third embodiment.

  In each of the above embodiments, one extension membrane case 53 is connected to the upper part of the first membrane case 2 and applied to the vertically elongated second membrane element 52. A plurality of extension membrane cases 53 may be vertically stacked on top of each other and connected to be applied to a membrane element that is longer than the second membrane element 52.

1 First membrane separation device 2 First membrane case (an example of a lower membrane case)
3 First membrane element 28, 65 Groove 50 Second membrane separation device 51 Second membrane case 52 Second membrane element 53 Extension membrane case (an example of an upper membrane case)
70 Membrane separation device set 75, 76 Split case body A Arrangement method B Width direction

Claims (12)

A second membrane case is constituted by a first membrane case having an open top and bottom, and an extension membrane case detachably connected to the first membrane case.
The first membrane case alone can store a plurality of flat first membrane elements in a state in which the first membrane elements are vertically arranged in a horizontal direction,
In the second membrane case, a plurality of flat-type second membrane elements that are longer than the first membrane element and longer than the first membrane case are housed in a horizontal orientation in a vertical posture. ,
A plurality of grooves are provided inside the second membrane case,
A membrane separation device, wherein a plurality of second membrane elements are arranged at predetermined intervals by inserting a side portion of the second membrane element into the groove. The membrane separation device according to claim 1, wherein the groove is provided inside the extension membrane case. The extension membrane case can be divided into a plurality of divided case bodies in a width direction orthogonal to the arrangement direction of the second membrane elements,
3. The membrane separation device according to claim 1, wherein the groove is provided inside the divided case body. In a membrane separation apparatus in which a plurality of flat first membrane elements are arranged in a vertical posture in a horizontal direction in a first membrane case whose top and bottom are open, the first membrane element is connected to a first membrane. An extension membrane case used to extend the first membrane case when replacing with a second membrane element that is longer than the element and longer than the first membrane case,
The top and bottom are open,
An extension membrane case detachably attached to the first membrane case. There are multiple grooves on the inside,
The extension membrane case according to claim 4, wherein the plurality of second membrane elements are arranged at predetermined intervals by inserting the side edge of the second membrane element into the groove. The extension membrane case according to claim 4 or 5, wherein the extension membrane case can be divided into a plurality of division case bodies in a width direction orthogonal to the arrangement direction of the second membrane elements. A first membrane case with upper and lower openings,
A plurality of flat first membrane elements that can be housed in the first membrane case in a vertical orientation and arranged in the horizontal direction;
An extension membrane case that is open at the top and bottom and that can be connected to the top of the first membrane case;
A plurality of flat second membrane elements that are longer than the first membrane element and longer than the first membrane case ,
The membrane separation is characterized in that the second membrane element can be accommodated in a second membrane case formed by connecting the first membrane case to the extension membrane case, being arranged in a vertical orientation in the horizontal direction. Equipment set. A plurality of grooves are provided inside the first membrane case and the extension membrane case, respectively.
A side portion of the first membrane element is inserted into a groove in the first membrane case;
The membrane separation device set according to claim 7, wherein the side portions of the second membrane element are inserted into the groove in the first membrane case and the groove in the extension membrane case. The extension membrane case can be divided into a plurality of divided case bodies in a width direction orthogonal to the arrangement direction of the second membrane elements,
The membrane separation device set according to claim 8, wherein the groove is provided inside the divided case body. A method for replacing a membrane element of a membrane separation device using the extension membrane case according to any one of claims 4 to 6,
Removing the first membrane element from inside the first membrane case,
Connecting the extension membrane case to the first membrane case to assemble the second membrane case,
A method for replacing a membrane element, wherein the second membrane element is housed in a second membrane case. A plurality of flat membrane elements are arranged in a horizontal orientation in a vertical position and housed in a membrane case with an open top and bottom,
Multiple grooves are provided inside the membrane case,
By inserting the side portions of the membrane element into the grooves, the plurality of membrane elements are arranged at predetermined intervals,
Film case, the height in the range of one membrane element is present, Ri divisible der vertically plurality,
A membrane separation device, wherein the membrane element is longer than a vertically divided membrane case . The membrane case can be separated into a lower membrane case and an upper membrane case provided above the lower membrane case,
The upper membrane case can be divided into a plurality of divided case bodies in a width direction orthogonal to the arrangement direction of the membrane elements,
The membrane separation device according to claim 11, wherein the groove is provided inside the divided case body.

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