JPH08192032A - Membrane element for membrane separator - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a unit module of a membrane element that is easy to manufacture, has high strength to withstand use in an immersion tank in which excessive water flow or bubble flow occurs, and is easy to handle. [Structure] A left and right side pillar portion 2 having a substrate portion 1 and projecting portions 8 and 9 projecting from both front and back surfaces of the substrate portion, and water collecting passages 4 and 4 provided at left and right side edges of the substrate portion. 2, a plate-shaped substrate 10 and two film bodies 5, 5 stretched on both the front and back surfaces of the base plate portion, and projections on the front and back surfaces of the left and right side pillars are engaged with each other by concave and convex engagement. Parts 6 and 7 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a unit element constituting a membrane module for a membrane separation device for performing membrane separation by a membrane body such as a reverse osmosis membrane, an ultrafiltration membrane, a microfiltration membrane and a polymer membrane. Regarding

[0002]

2. Description of the Related Art Immersion type membrane separators are constructed by immersing a plurality of membrane elements into a modular membrane module in a submerged tank and utilizing the head difference based on the submerged water depth.
Permeate can be collected by performing membrane separation with low energy using a suction pump. The conventional membrane element used in such a submerged membrane separation device has a structure in which membranes are attached to both sides of a plate-like water-permeable spacer to which a water collecting pipe is attached and suspended, or fixed in a tank. is there.

[0003]

However, in order to manufacture the above-mentioned membrane element, the support plate to which the water collecting pipe is attached must be wrapped with the membrane and then bonded together without leaking the membrane. A high level of processing technology and a great deal of labor are required for the bonding work of. In addition, a technique for thickening the water passage spacer for attaching the water collection pipe or for attaching the water collection pipe and the water passage spacer was also required. There is also a membrane module in which a large number of membrane elements with membranes stretched on both sides, such as a tricot water collecting cloth, are laminated. This membrane module is light and easy to handle, but it does not have rigidity, so excessive water flow When it is immersed in the resulting immersion tank and used, there is a drawback that the film deteriorates due to the vibration of the film leaf and the film life is short. Therefore, an object of the present invention is to provide a unit element for a membrane module that is easy to manufacture, has high strength to withstand use in an immersion tank in which excessive water flow or bubble flow occurs, and is easy to handle. And

[0004]

The present invention was developed in order to achieve the above-mentioned object, and has a substrate portion and a protrusion portion that protrudes beyond both the front and back surfaces of the substrate portion, and the left and right sides of the substrate portion. It consists of a plate-shaped base with side pillars having water collecting channels provided along the edges, and two film bodies stretched on both the front and back sides of the board. It is characterized in that a concave-convex fitting engagement portion is provided on the portion.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the first embodiment shown in FIGS. 1 to 5, 1 is a substrate portion, 3 is a vertical groove on both front and back surfaces of the substrate portion, and lateral grooves 2, 2, 2 opened on the left and right side edges of the substrate portion. Has protrusions 8 and 9 that protrude from both the front and back surfaces of the board portion, and left and right side pillar portions 4 provided along the left and right side edges of the board portion are vertically provided on the respective side pillar portions. Water channels that communicate with the lateral grooves 3 on both the front and back sides of the substrate section, 5, 5 are film bodies stretched on both the front and back sides of the substrate section, and 6 and 7 are irregularities provided on the protrusions 8 and 9 of the left and right side pillars 2 and the side pillar portions 2 and 2 on the left and right sides constitute a plate-shaped base body 10.

In the plate-like substrate 10, in the illustrated embodiment, a substrate member 11 which becomes the substrate portion 1 and two side pillar members 21 and 21 which become the left and right side pillar portions 2 are molded from plastic or the like. Assembled: integrated by adhesion, welding, etc.

The upper ends of the left and right side pillar members 21 are open,
A vertical water collecting channel 4 having a closed lower end is provided in a U-shaped cross section, and the U-shaped water collecting channel is opened vertically in a side surface facing a side edge of the substrate member. Then, apart from the side surface where the U-shaped water collection channel 4 is open, each side pillar member has a front surface 22 and a back surface 2
3 has projecting portions 8 and 9 projecting more than 3 in the vertical direction, and the projecting portion 9 from the back surface 23 has a C-shaped groove in the vertical direction and a front surface 22
The protrusion 8 is provided with an Ω-shaped protrusion that fits into the C-shaped groove, and the C-shaped groove and the Ω-shaped protrusion form concave and convex fitting engagement portions 6 and 7.

The mating and engaging portions 6 and 7 are formed by sliding the convex and the concave so that the two members are inseparably joined to each other in a contact surface state, and are slid again to release the engagement. It makes it impossible to separate. For this reason,
In addition to the C-shaped groove and Ω-shaped ridge shown in the figure, T-shaped or L-shaped ridge,
It may be a T-shaped or L-shaped groove.

The left and right side pillar members 21 are, as shown in the drawing, a water collecting channel 4 having a U-shaped cross section, a pillar member 24 having fitting engagement portions 6 and 7, and projecting portions 8 and 9, and a lower end of the pillar member. A bottom plate member 2 fixed to the bottom of the water collection channel 4 by being adhered or welded thereto
5 and an upper plate member 26 that has an upward connection tube 27, is fixed to the upper end of the column member by adhesion, welding, etc. to close the upper end of the water collection channel, and is connected to the water collection channel by the connection tube 27. With such a configuration, the pillar member can be formed into a long length by extrusion molding of aluminum or plastic, and can be obtained by cutting it into a required length, so that the manufacturing is easy.
Further, it is preferable that the bottom plate member and the upper plate member are provided with stoppers 28 which are located above the projecting portions 8 and 9 and which are positioned when the fitting engagement portions 6 and 7 are fitted together.

The thickness between the front surface and the back surface of the substrate member 11 and the thickness between the front surface and the back surface of the side pillar member are the same. Further, the projecting height of the projecting portion 9 is higher than that of the projecting portion 8 because the C-shaped groove is formed.

The lateral grooves 3 of the substrate portion are provided on both sides of the front and back surfaces of the substrate member toward the left and right side edges 18 slightly below the upper edge and slightly above the lower edge. The base plate member is provided with extension portions 19 that protrude shallowly into the water collecting passage 4 of the U-shaped cross section of the left and right side pillar members, outside the left and right side edges. The thickness between the front surface and the back surface of this extension is thinner than that of the substrate member, and is equal to the groove width of the water collection channel 4. As a result, the front and back surfaces 12, 13 of the substrate member
And the side edge 18 is formed as a step between the front and back surfaces of the extension portion 19. Then, the lateral groove 3 extending toward the side edge 18 reaches the side edge of the extension portion 19.

The left and right extension portions 19 of the base plate member are inserted into the water collecting passage 4 having a U-shaped cross section of each side column member until the stepped side edges 18 come into contact with the left and right side column members 21, and the lower end of the extension portion is inserted. Is fixed on the bottom plate member 25 with the upper end of the upper plate member 26 under the upper plate member 26 by adhesion, welding, or the like to complete the plate-shaped substrate 10, and the lateral groove 3 reaches the side edge of the extension portion 19. Therefore, the lateral groove communicates with the water collection channel 4.

As described above, the lateral grooves 3 are provided on both the front and back sides of the substrate member, slightly apart from the upper edge and the lower edge.
The thickness of the left and right side pillar members is the same as that of the substrate member. Therefore, the surface 12 along the upper and lower edges of the substrate member and the surface 22 of the side pillar member form a rectangular frame surface 30 in the same vertical plane.
Are formed, and the cross-sections (the surface of the substrate member) 31 located at the intervals of the lateral grooves cross the inside of the frame surface 30 at the same height. In the same way, a square frame surface of the same vertical surface is formed on the back side,
The cross-section, which is the back surface of the substrate member located at the interval of the lateral groove, crosses.

As a result, the film body 5 having the same size as the above-mentioned square frame surface is stretched over the front surface of the substrate member and the side pillar member, and the back surface of the substrate member and the side pillar member, and the lateral grooves on the front and back sides of the plate-shaped substrate are formed as films. The permeated water, which is blocked by the body and permeated through the membrane, can be collected through the lateral groove and the water collection channel.

In order to construct a membrane module, for example, a convex fitting engagement portion 6 on the surface of one (first) membrane element and a concave fitting engagement on the back surface of another (second) membrane element. The engagement portion 7 is slid from the lower end and fitted. In this case, when the upper plate member 26 fixed to the upper end of the side column portion closes the upper end of the fitting engagement portion 7 with the stopper 28, the convex engagement portion contacts the stopper 28 to complete the fitting. Can be known by hand. Since the stopper 28 is received by the convex fitting engagement portion 6 from below, the second membrane element can be integrally supported by supporting the (first) membrane element. In this way, the concave and convex fitting engagement portions are slid and fitted, and the required number of membrane elements are arranged in a line, and the membrane elements are prevented from disassembling by, for example, tightening a band around them to form a membrane module.

Since the concave and convex mating engaging portions 6 and 7 are provided on the projecting portions 8 and 9 of the side column portion, a water passage interval 32 is provided between the base plate portions of two adjacent membrane elements. Occurs.

An end plate 33 having the same size as the plate-shaped substrate having a convex fitting engagement portion on the protrusion and an end plate having the same size as the plate-shaped substrate having a concave fitting engagement portion on the protrusion are provided. 34 may be fitted and attached to the outermost membrane element and the outermost membrane element of the membrane module to protect the membrane body exposed to the outside.

To use as a submerged membrane separation device, as shown in FIG. 6, the connecting cylinder 27 standing from each membrane element is connected to a water collecting header 35, and the water collecting header is provided with a flexible pipe 36.
Connect the suction pump 37 to the suction side of the front and rear end plates 33, 34 on the bottom of the water-immersed tank 38 with four legs 39.
Installed by, for example, immersed in water, and diffused in water 40
To generate a circulating flow through the water gap 32 between the membrane modules, operate the suction pump 37, and pass the permeated water that has permeated the membrane bodies 5 and 5 on the front and back of each membrane module to the lateral groove 3,
Water is collected through the water collection channel 4, the connection cylinder 27, the water collection header 35, and the pipe 36.

In the second embodiment shown in FIG. 7, a protrusion 14 having a convex fitting engagement portion 16 similar to that on the left and right side columns is also formed in the center of the front and back sides of the substrate 1, and a concave fit. A protrusion 15 having a mating engagement portion 17 is provided, and the lateral groove 3 is formed slightly away from the protrusions 14 and 15 on the front and back sides. Therefore, two film bodies are stretched on the front surface and the back surface of the substrate portion on the left and right sides of the protrusions 14 and 15, respectively. The large width of the board portion 1 means not only the fitting engagement portions on the protrusions of the left and right side pillars, but also the fitting engagement portions on the protrusions provided at the center of the board portion. It is preferable to assemble and firmly assemble the membrane module with a plurality of plate-shaped substrates.

Further, if the substrate portion is made of a porous member,
Since the permeated water can be sucked into the water collecting passages of the left and right side pillars to collect water without providing the lateral grooves on the front and back sides of the substrate portion, the lateral grooves can be omitted in that case.

In each of the illustrated embodiments, the substrate member and the two side pillar members are separately molded and then assembled to the plate-shaped base body by adhesion or the like. However, the substrate portion and the left and right side pillar portions are integrally molded. It may be a plate-shaped substrate.

[0022]

As is apparent from the above, the membrane element according to the present invention has rigidity because it has the plate-like base body having the substrate portion and the left and right side column portions provided on the left and right side edges thereof, Since the film body is stretched on both front and back surfaces of the substrate portion, it can sufficiently withstand excessive water flow and bubble flow. Further, lateral grooves open to the side edges are provided in a multi-tiered manner in the vertical direction on the front and back sides of the substrate part, and vertical water collection channels communicating with the lateral grooves are provided along the lateral edges of the substrate part on the left and right side pillar members. Therefore, the permeated water that has permeated the membrane can be collected through the lateral groove and the water collection channel.
Further, since projections having fitting engagement portions are provided on the front and back sides of the left and right side columns in the vertical direction, by sliding and fitting the fitting engagement portions, one membrane element can be formed with an arbitrary number of membrane elements. The membrane module can be easily assembled, and a water passage space can be formed between the adjacent membrane elements in the assembled state.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of a membrane element of the present invention in which a part of the assembled state of a membrane module is cut away.

FIG. 2 is an enlarged cross-sectional view of a portion of FIG.

FIG. 3 is an exploded perspective view of a lower portion of the membrane element of FIG.

FIG. 4 is an exploded perspective view of an upper portion of the membrane element of FIG.

FIG. 5 is a front view of the membrane element of FIG. 1 before the membrane is stretched.

FIG. 6 is an explanatory view showing a state where the membrane element is used as an immersion type membrane separation device.

FIG. 7 is a perspective view of a second embodiment of the membrane element of the present invention in which a part of the assembled state of the membrane module is cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 base plate part 2 side pillar part 3 lateral groove 4 water collecting channel 5 membrane body 6 convex fitting engaging part 7 concave fitting engaging part 8 protruding part 9 protruding part 10 plate-shaped substrate

Claims (1)

[Claims] 1. A plate-shaped base body having a base plate part and a side column part having a projection part protruding from both front and back surfaces of the base plate part and having water collecting passages provided along left and right side edges of the base plate part. ,
And a membrane portion comprising two film bodies stretched on both front and back surfaces of the substrate portion, and projections on the front and rear surfaces of the left and right side pillar portions are provided with concave and convex engaging engagement portions. Membrane element.