JP4657906B2 - Filtration unit - Google Patents

Description

  In the present invention, for example, when sewage or sewage is treated by a membrane separation activated sludge method in a sewage treatment plant or the like, a water tank or a reservoir (hereinafter referred to as a water tank or the like) into which raw water such as sewage or sewage is introduced. The present invention relates to a filtration unit that is installed inside and filters the raw water.

As a membrane separation apparatus used in the membrane separation activated sludge method, for example, in Patent Document 1, a membrane case containing a membrane cartridge is suspended in a tank and is fitted into the membrane case in a double structure. There has been proposed a membrane separation device in which a diffuser case is slidable up and down, and on both sides of the membrane case, a supply pipe installed upright connected to a diffuser pipe disposed below the diffuser case. A guide portion that engages with the trachea and the diffuser drain pipe is provided, and the diffuser case is provided with an engaging portion that engages with the guide portion provided on the side surface of the membrane case. According to Patent Document 1, in such a membrane separation device, when the membrane separation device is inserted into and removed from the tank, the intake pipe and the diffused drain pipe are easily arranged at a fixed position in the tank. In addition, the diffuser case can be accurately positioned above the diffuser tube, and the membrane case can be accommodated in the diffuser case when the membrane separator is taken out of the tank and placed on the floor. It is said that the height of the apparatus is lowered, and the attachment and detachment and maintenance of the membrane cartridge housed in the membrane case are facilitated.
JP 2002-186838 A

  However, in the device described in Patent Document 1, the membrane case and the diffused case guided by the intake pipe and the diffused drain pipe as described above are supported by being suspended in the tank by the rope. Since the case is merely engaged with the intake pipe and the diffused drain pipe by the guide portion, the membrane case, the diffused case, and the membrane cartridge stored in the membrane case may become unstable in the tank. Inevitable. In particular, in the membrane-separated activated sludge method, air is always blown out from the diffuser pipe provided below the diffuser case, and the raw water is aerated and oxygen is supplied to the activated sludge. When constantly aerated and vigorously agitated, the membrane case, diffuser case, and membrane cartridge just above the diffuser tube are also shaken vigorously, causing the case to collide with the intake and diffuser drain pipes, causing damage to them. In some cases, the membrane cartridge itself may be damaged.

  The present invention has been made under such a background. In particular, in a filtration unit used for filtering raw water in a membrane separation activated sludge method, even if raw water is always aerated and vigorously stirred, it is applied to a casing or a membrane module. It aims at providing the filtration unit which does not cause damage etc.

In order to solve the above problems and achieve such an object, the present invention is a filtration unit installed in a water tank or the like into which raw water is introduced, and is immersed in the raw water in the water tank or the like And a membrane module accommodated in the casing. The casing is hooked to an opening edge of the water storage tank or the like, or a support section passed over the water storage tank. A support member made of a rigid material for supporting the casing by suspending the casing in the raw water is attached , and the support member has a hook portion hooked to the opening edge portion or the support portion, and the hook portion A suspension portion extending from the casing and attached to the casing. The suspension portion is attached to the first suspension portion attached to the casing, and the latching portion is attached to an upper end portion of the first suspension portion. What is the first suspension part provided? A second suspension portion of the body, and a base end portion of the second suspension portion is rotatably supported by a pin on the upper end portion of the first suspension portion, whereby the second suspension portion is The stop portion is attached to the casing so as to be rotatable in a direction from the upper opening of the casing toward the outside .

  Therefore, in such a filtration unit, the casing is supported by the support member made of a rigid material and suspended in the raw water, and this support member is passed over the outer opening edge of the water storage tank or the like or the water storage tank or the like. The casing can be firmly supported in the water storage tank or the like through the support member having high rigidity. For this reason, even if raw water such as sewage or sewage in a water tank or the like in which the filtration unit is installed in the membrane separation activated sludge method is constantly vigorously stirred by aeration, the casing immersed in the raw water is shaken. As a result, it is possible to prevent the casing and the membrane module accommodated in the casing from being damaged.

Here, the support member is formed of a metal cylindrical member, an angle member, a channel member, a strip member having various cross-sectional shapes, etc., in order to avoid an increase in weight while ensuring necessary rigidity. It is desirable to be done. In particular, in the filtration treatment in the membrane separation activated sludge method, the filtration unit is installed so that the casing and the membrane module are completely immersed in the raw water, and the raw water is circulated by aeration. to be reliably supported by suspension from the opening edge and the support of the water storage tank or the like, the support member includes a hook portion that is hooked on the opening edge or the support portion, extending from the engagement portion And a suspension part attached to the casing .

  By the way, in such a filtration unit, for example, when performing maintenance, inspection, or replacement of the membrane module, the filtration unit is pulled up from the raw water together with the support member and the casing. When such an operation is possible from the opening, it is convenient if the operation can be performed in a state where the upper opening is raised from the raw water without completely lifting the entire filtration unit from the raw water and carrying it out. . Therefore, in such a case, the support member or the casing can be further provided with a second latching portion that is latched by the opening edge or the support portion on the upper end side of the casing. Thus, the above-described operation can be performed by supporting the casing directly or via the support member by the second hooking portion.

Further, in the present invention, even when the work is performed in such a state that the upper opening of the casing is raised above the raw water, or when the filtration unit is carried out from the water storage tank or the like, the suspension part is removed. A first suspension part attached to the casing, and a second suspension part that is attached to an upper end part of the first suspension part and provided with the hooking part at a tip thereof, which is separate from the first suspension part. The base end portion of the second suspension portion is rotatably supported by a pin on the upper end portion of the first suspension portion so that the second suspension portion can rotate in a direction from the upper opening of the casing toward the outside. By attaching to the casing, it is possible to perform maintenance, inspection, replacement, and the like of the membrane module more easily by rotating the suspension portion to the outside during the operation.

1 to 3 show a first reference example for explaining the embodiment of the filtration unit of the present invention. The filtration unit 1 of this reference example is used when processing raw water such as sewage and sewage by a membrane separation activated sludge method in a sewage treatment plant as described above. As shown on the left side of FIG. It is installed in a water tank A into which raw water W is introduced. Here, the symbol B in FIG. 3 indicates the opening edge of the water storage tank A, and the opening edge B positioned on the opposite side of the water storage tank A is as shown in FIG. A pair of rod-like support portions C made of square pipes, H-type steel, I-type steel, or the like are stretched over the water storage tank A in parallel, and the filtration unit 1 of this reference example is hooked on these support portions C to store water. It is suspended in the tank A.

As shown in FIG. 1, the filtration unit 1 is configured such that a membrane module 3 is accommodated in a cylindrical casing 2 that is open at the top and bottom, and is supported by a support member 4 attached to the casing 2. The casing 2 is hooked on the part C and supported so as to suspend the casing 2 in the raw water W. Here, the casing 2 is formed in a rectangular shape in plan view with a metal material having high corrosion resistance such as stainless steel in this reference example , and its height is larger than the length of the long and short sides of the rectangle. In the raw water W, the upper end of the raw water W is located below the surface H of the raw water W held in the water storage tank A as shown in FIG. Soaked in.

  The membrane module 3 is formed by laminating a large number of elements each having a hollow fiber membrane stretched in a screen shape or a flat membrane-like separation membrane, or by bundling a number of tubular ceramic membrane elements. As shown in FIG. 3, the casing 2 is mounted in the casing 2 so as to be spaced from the inner wall surface of the casing 2. The membrane module 3 is connected to a membrane filtration water pipe (not shown) that discharges the membrane filtrate filtered from the raw water W. Also, below the membrane module 3, an air diffuser (not shown) is provided in the casing 2, and the raw water W in the water storage tank A is diffused by the air diffused from the air diffuser. It is filtered by the membrane module 3 while rising in the casing 2, and further forms a circulation flow that descends from the upper end of the casing 2 and rises again, and oxygen is supplied to the raw water W. Yes.

On the other hand, the support member 4 is made of a cylindrical material made of a metal material such as a steel material like stainless steel like the casing 2, and in this reference example , a cylindrical tube having a rectangular cross section as shown in FIGS. It is made of a rigid material that can support the load of the filtration unit 1 including the casing 2 and the membrane module 3 substantially without bending. If the filtration unit 1 can be supported in this way, the support member 4 is an L-shaped angle material, a channel material having a U-shaped cross-section, or an H-shaped or I-shaped strip material. Or a combination thereof.

In this reference example , such a support member 4 is attached to the four corners of the rectangle that the casing 2 is in plan view by joining by welding or the like or fastening by bolting or the like. Here, the support members 4 have the same shape and the same size, and are hooked to the support portion C spanned over the water storage tank A, and the casing extends from the hook portion 5 to the casing. The suspension part 6 is attached to the suspension part 2 and suspended by immersing the casing 2 in the raw water W as described above. The suspension part 6 is formed longer than the height of the casing 2 by the metal cylindrical material as described above, and is attached so that the longitudinal direction thereof is along the intersecting ridge line between the side surfaces of the casing 2 at the corner part. The lower end of the casing 2 is the same as the lower end of the casing 2 and the upper end of the casing 2 protrudes from the upper end of the casing 2.

  The hook portion 5 is shorter than the suspension portion 6, and is perpendicular to the suspension portion 6 between the support members 4 positioned at both corners of the rectangular short side of the casing 2 in plan view. Further, it is attached to the upper end of the suspension part 6 by welding or bolting so as to protrude outward in the short side direction. Here, as shown in FIG. 2, the distance L between the inner side surfaces of the pair of support portions C spanned in parallel on the water storage tank A is the support member 4 attached to both ends of the short side of the casing 2. The latching part 6 has a width M larger than the width M between the outer side surfaces so that both outer side surfaces of the suspension unit 6 are just fitted between the inner side surfaces and protrudes from the upper ends of the suspension unit 6. An interval N between the protruding ends of the portion 5 is larger than the interval L, and is, for example, equal to an interval between both outer surfaces of the pair of support portions C.

  In this way, the filtration unit 1 to which the support member 4 is attached can be inserted between the pair of support portions C from above, with the long side of the rectangle that the casing 2 is in plan view parallel to the pair of support portions C. The casing 2 and the membrane module 3 are immersed in the raw water W and installed in the water tank A as described above in a state in which the latching portion 5 of each support member 4 is placed on the support portion C. The Note that the latching portion 5 placed on the support portion C may be detachably attached to the support portion C by bolting or the like. Further, when performing maintenance, inspection or replacement of the membrane module 3, the filtration unit 1 is pulled upward together with the membrane module 3, and is carried out of the water storage tank A as shown in FIG.

  In the filtration unit 1 configured as described above, the casing 2 housing the membrane module 3 is supported by the rigid support member 4 and suspended in the raw water W. Therefore, the casing 2 and the membrane module 3 are removed from the raw water. It can be firmly supported in W. For this reason, even if the raw water W in the water storage tank A is always vigorously stirred by the air diffused from the air diffuser in the membrane separation activated sludge method as described above, the casing 2 and the membrane module 3 accommodated in the casing 2 are contained. The vibration of the membrane module 3 can be suppressed, and the membrane module 3 hits the membrane filtration water pipe or the supply pipe for sending air to the air diffuser due to such vibration. It is possible to prevent the membrane module 3 itself from being damaged.

Further, since the support member 4 is formed of a cylindrical body made of metal such as stainless steel or an angle member, a channel member, and a strip member having an H-shaped or I-shaped section, the casing 2 and the membrane module 3 are thus formed. While ensuring sufficient rigidity to suspend and support, it is possible to prevent the weight of the entire filtration unit 1 including the support member 4 from becoming unnecessarily large. In addition, in the present reference example , the support member 4 is attached to the casing 2 to suspend the casing 2 in the raw water W, and is attached to the upper end of the suspension part 6 so as to be placed on the water tank A. Since it has the latching part 5 mounted and latched on the passed support part C, in the raw water W circulated by the air diffuser in the membrane separation activated sludge method, the casing 2 and the membrane module For example, when the filtration unit 1 is unloaded from the water storage tank A during maintenance, inspection, replacement, etc. of the membrane module 3 as described above, the filtration unit 1 may be lifted directly above and transferred. It is economical because the equipment for lifting and its operation are relatively simple.

By the way, in the present reference example , the suspension portion 6 of the support member 4 is formed as an integral rectangular tube, that is, a square pipe, and is attached to the casing 2 so as to extend straight upward from the upper end of the casing 2. Although the latching portion 5 is provided, when the maintenance, inspection or replacement of the membrane module 3 is performed in this way, the periphery of the upper opening of the casing 2 is made as open as possible. However, it is desirable for work.

Therefore, in order to ensure such workability, in the filtration unit 11 according to the first embodiment of the present invention shown in FIG. 4 , the suspension portion 6 extends in the direction from the upper opening of the casing 2 toward the outside. The casing 2 is rotatably attached . Note that, in the first reference embodiment as well as in the second reference example and the second embodiment described below, the same reference numerals are assigned to the same parts as in the first reference example and the description is omitted. .

That is, in the first embodiment, the suspension portion 6 of each support member 4 includes a first suspension portion 6A attached to the casing 2 as in the first reference example, and an upper end portion of the first suspension portion 6A. It is comprised from the 2nd suspension part 6B separate from the 1st suspension part 6A by which the latching part 5 is provided in the front-end | tip, and the base end part of this 2nd suspension part 6B is the 1st suspension. The second suspension portion 6B is moved from the upper opening portion of the casing 2 to the outside as shown in FIG. 4 together with the latching portion 5 by being rotatably supported by the pin 12 on the upper end portion of the portion 6A. It can be rotated in the direction. In this embodiment, the pin 12 is driven in parallel to the long side of the rectangle that the casing 2 is in plan view, and the second suspension portion 6B is connected to the first suspension portion 6A in a plane perpendicular to the long side. Can be rotated in a range of 90 ° between a state extending upward in a straight line from the state extending horizontally and perpendicular to the first suspension, and positioning is performed in each state. It is possible.

Accordingly, in such a first embodiment, when the above-described operation is performed, the second suspension portion 6B of the suspension portion 6 is rotated so as to be separated from the periphery of the upper opening portion of the casing 2, and this casing. Since the space above 2 can be opened, operations such as maintenance, inspection or replacement of the filtration module 3 can be easily performed without being obstructed by the support member 4. In the present embodiment, as described above, the second suspension 6B can be rotated in a plane perpendicular to the long side of the rectangle, but can be rotated in a plane perpendicular to the short side or in other directions. It may be possible, and does not limit the direction of this rotation. In addition, in order to enhance the stability in the state of being immersed in the raw water W, the second suspension portion 6B extends upward in a straight line with the first suspension portion 6A, for example, both suspension portions 6A having a rectangular tube shape, A locking mechanism that holds this state by restraining the rotation of the second suspension part 6B by, for example, slidably providing a lock member that is inserted from one side of the 6B to the other side, is a connecting part of the suspension parts 6A and 6B. It is desirable to provide it.

  On the other hand, when performing minor maintenance and inspection work as described above, or when replacing only a few individual elements even when replacing the membrane module 3, the entire filtration unit 1 is completely supplied with raw water. Even if the work is not carried out after being pulled up from W and carried out of the water storage tank A, if the casing 2 can be held in a state where it floats from the raw water W to such an extent that the upper opening is located above the support C, for example, Work can be performed from the support portion C, which is efficient.

Therefore, in the filtration unit 21 of the second reference example for explaining the embodiment of the present invention shown in FIGS. 5 and 6 and the filtration unit 31 of the second embodiment of the present invention shown in FIG. Corresponding to such work, the second latching hooked on the support portion C on the upper end side of the casing 2 of the support member 4 separately from the hooking portion 5 on the upper end of the support member 4. It is characterized in that the portion 22 can be disposed. Of these, the second reference example is such that the second latching portion 22 can be disposed in the first reference example in which the suspension portion 6 of the support member 4 is formed in an integral rectangular tube shape, and In the second embodiment, the second suspension portion 22 is added to the first embodiment of the present invention in which the suspension portion 6 is rotatably attached to the upper end portion of the first suspension portion 6A. The parts that can be arranged are the same as those in the first embodiment, and the same reference numerals are assigned.

  The second hooking portion 22 is, for example, an attachment hole 22A provided on the upper end side of the casing 2 on the surface of the support member 4 facing the outside in the short side direction of the suspension 6 or the first suspension 6A. And a thick plate or prismatic retaining member 22B that is removably fitted into the mounting hole 22A, and is filtered so that the mounting hole 22A is located above the upper surface of the support C. In the state where the units 21 and 31 are pulled up as indicated by the arrows in FIG. 3, the supporting member 4 protrudes from the surface facing outward in the short side direction by fitting the latching member 22B into each mounting hole 22A. Can be arranged. The hook members 22B fitted in the mounting holes 22A of the respective support members 4 extend in the short side direction in one horizontal plane, and between the tips of the hook members 22B on both sides in the short side direction. Is made larger than the interval L between both inner side surfaces of the pair of support portions C as well as the interval N between the protruding ends of the latching portion 5.

  Therefore, when the filtration members 21 and 31 are lowered in a state where the latching member 22B is fitted in the mounting hole 22A and the second latching portion 22 is disposed, the latching of these second latching portions 22 is performed. Since the member 22B is placed on the support portion C, the filtration units 21 and 31 are held in a state where the upper end portion of the casing 2 is raised from the water surface portion H of the raw water W as shown in FIG. As described above, maintenance, inspection work, element replacement work of the membrane module 3 and the like can be performed from above the support portion C. Further, after the work is finished, if the filtration units 21 and 31 are slightly pulled up once and the retaining member 22B is removed from the mounting hole 22A and lowered as it is, the retaining portion 5 at the upper end of the supporting member 4 is placed on the supporting portion C. Since the casing 2 and the membrane module 3 are immersed again in the raw water W until they are placed, the filtration of the raw water W in the membrane separation activated sludge method or the like can be resumed.

Thus, according to the second reference example and the second embodiment, the operation from the upper opening of the casing 2 can be performed without completely lifting the filtration units 21 and 31 from the raw water W and carrying them out of the water storage tank A. It is possible to reduce the work time and increase the efficiency. Then, as in the second embodiment, the suspension portion 6 of the support member 4 is constituted by the first and second suspension portions 6A and 6B, and the second suspension portion 6B is rotated away from the upper opening of the casing 2. If it is provided so as to be movable, workability can be further improved and further work efficiency can be promoted.

In the second reference example and the second embodiment, the second latching portion 22 is fitted in the mounting hole 22A formed in the support member 4 as described above so that the latching member 22B can be inserted and removed. For example, when the above-described operation is performed, the latching member is disposed in the suspension portion 6 of the support member 4 or the first suspension portion 6A itself so as to be embeddable. To support the filtration units 21 and 31, and when membrane filtration is performed, a latch member may be housed to immerse the casing 2 and the membrane module 3 in the raw water W. Moreover, as long as sufficient rigidity is ensured in the casing 2 itself, such a second latching portion may be disposed on a side surface of the casing 2 facing the support portion C side.

Furthermore, in the said 1st , 2nd reference example and embodiment, although the supporting member 4 is hooked by the support part C passed on the water storage tank A and the casing 2 is suspended in the raw | natural water W, Depending on the size of the tank A and the filtration units 1, 11, 21, 31, etc., the lengths of the latching portion 5 and the second latching portion 22 are increased, for example. The casing 22 may be suspended and supported in the raw water W by hanging the portion 22 directly on the opening edge B of the water tank A. Further, even in such a case, or when suspended through the support portion C as in the first and second reference examples and embodiments, the hooking portion 5 is, for example, two adjacent support members 4. In this way, the suspension 6 has a cross-beam shape spanned between the upper ends thereof, and both ends thereof protrude in the long side direction and the short side direction of the rectangle so as to be hooked on the opening edge portion B and the support portion C. May have been made. At this time, in the second reference example and the second embodiment in which the second suspension part 6B of the suspension part 6 is rotatable, the upper ends (tips) of the second suspension parts 6B that rotate in the same direction are used. What is necessary is just to hang the latching | locking part 5 in the shape of a horizontal beam.

It is a perspective view which shows the filtration unit 1 of the 1st reference example for demonstrating the 1st Embodiment of this invention. FIG. 2 is a perspective view showing a state in which the reference example shown in FIG. 1 is hooked on a support portion C (water tank A is not shown). It is sectional drawing which shows the state (left side) installed in the water tank A and the state (right side) carried out from the water tank A in the reference example shown in FIG. It is a perspective view which shows the filtration unit 11 of the 1st Embodiment of this invention. The perspective view which shows the state which filtered the filter unit 21 of the 2nd reference example on describing the 2nd Embodiment of this invention on the support part C by the 2nd latching part 22 (the water tank A is illustrated) Abbreviation). FIG. 6 is a cross-sectional view showing a state in which the reference example shown in FIG. 5 is hooked on a support portion C by a second hook portion 22. FIG. 6 is a perspective view showing a state in which a filtration unit 31 according to a second embodiment of the present invention is hooked to a support portion C by a second hooking portion 22 (water tank A is not shown).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11,21,31 Filtration unit 2 Casing 3 Membrane module 4 Support member 5 Suspension part 6 Suspension part 6A 1st suspension part 6B 2nd suspension part 12 Pin 22 2nd latch part 22A Mounting hole part 22B Suspension member A Reservoir B Open edge of Reservoir A C Support member W Raw water

Claims (2)

A filtration unit installed in a water tank or a reservoir into which raw water is introduced, comprising a cylindrical casing immersed in the raw water in the water tank or the reservoir, and a membrane module accommodated in the casing The casing is made of a rigid material that is hung on an opening edge of the water tank or the reservoir or a support portion that is passed over the water tank or the water reservoir, and that supports the casing by suspending the casing in the raw water. A support member is attached ,
The support member includes a hook portion hooked to the opening edge or the support portion, and a suspension portion extending from the hook portion and attached to the casing,
The suspension part includes a first suspension part attached to the casing and a second suspension part that is attached to an upper end part of the first suspension part and provided with the latching part at a tip thereof. It consists of a suspension part,
A base end portion of the second suspension portion is rotatably supported by a pin on the upper end portion of the first suspension portion, so that the second suspension portion and the latching portion are placed on the upper opening of the casing. A filtration unit, wherein the filtration unit is attached to the casing so as to be rotatable in a direction from the outside to the outside . The aforementioned supporting member or the casing, the upper end of the casing, further second hooking portion to be hooked on the opening edge or the support portion is characterized in that it is capable disposed claims Item 2. The filtration unit according to Item 1 .

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