JP3522038B2 - Attaching structure of diffuser tube in immersion type membrane separation device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an air diffusing tube in an immersion type membrane separation device used for human waste treatment, merger treatment and the like.

[0002]

2. Description of the Related Art Conventionally, an immersion type membrane separator installed in a processing tank has been used as a processing device for performing human waste treatment, merger treatment and the like.

As shown in FIG. 5, the immersion type membrane separation apparatus 1
Is a box frame-shaped air diffusing case 4 in which upper and lower open box-like membrane cases 2 have flat plate-like filtration membrane cartridges 3 arranged vertically and arranged at regular intervals.
An air diffuser pipe 6 that communicates with an air supply source such as a blower 5 outside the tank via an air diffuser pipe 5a is disposed inside the membrane case 2
And the air diffuser case 4 are arranged above and below each other.

In the filtration membrane cartridge 3, the filtration membranes 8 are arranged on both surfaces of the filtration plate 7, and a membrane permeate flow channel formed between the filtration plates 7 and 8 or inside the filtration plate 7 (see FIG. It is configured by forming a membrane permeated liquid outlet 9 communicating with (not shown) in the filter plate 7.

A membrane permeate extraction tube 10 and a collecting pipe 11 are provided so as to communicate with the membrane permeate outlet 9 of the filtration membrane cartridge 3, and the membrane permeate outlet pipe 12 is connected to the collecting pipe 11. Is provided.

In such a structure, when the liquid to be treated such as the activated sludge mixed liquid in the treatment tank is filtered, the filtration membrane cartridge is passed through the membrane permeated liquid outlet pipe 12, the collecting pipe 11 and the membrane permeated liquid take-out tube 10. Suspended substances such as activated sludge contained in the liquid to be treated are captured by the filtration membrane 8 by applying suction pressure to the permeate flow passage of No. 3 or by using the head of the liquid to be treated in the tank as a driving force for filtration. Then, the permeated liquid that has permeated through the filtration membrane 8 and flowed into the permeated liquid flow path is taken out from the permeated liquid extraction tube 1
0, the collecting pipe 11, and the membrane permeated liquid outlet pipe 12 are taken out of the processing tank.

At this time, the air supplied from the blower 5 is diffused through the diffuser holes 6a of the diffuser pipe 6, and the air bubbles of the diffused air and the rising water flow generated thereby are distributed to the gaps between the filtration membrane cartridges 3. By letting in
The entire membrane surface of the filtration membrane cartridge 3 is uniformly washed by the air bubbles and the rising water flow, and the rising water flow reduces the concentration polarization on the membrane surface to reduce the filtration resistance, and the inside and outside of the membrane case 2 and the air diffusion case 4. A circulating water flow that circulates through is formed.

[0008]

By the way, in the conventional submerged membrane separation apparatus as described above, an opening 4a is provided in the lower part of the air diffusion case 4, and the air diffusion case 4 is provided through the opening 4a.
A diffusing pipe 5a is introduced into the inside of the chamber and is connected to the diffusing pipe 6. Therefore, there is a problem that the work of mounting and fixing the air diffuser 6 and the air diffuser pipe 5a on the air diffuser case 4 is complicated.

The present invention solves the above problems, and an object of the present invention is to make it possible to easily attach and fix an air diffuser or an air diffuser pipe.

[0010]

In order to solve the above problems, the attachment structure of the air diffusing tube in the submerged membrane separation apparatus according to claim 1 of the present invention has a plurality of inner side surfaces of the side walls facing each other of the casing. Form the slits in the vertical direction, insert into each slit and arrange a plurality of filtration membrane cartridges in parallel,
In an immersion type membrane separation device in which an air diffusing tube is arranged below each filtration membrane cartridge, a pipe hole is formed by penetrating both side walls having the slit, and the air diffusing pipe is inserted through the pipe hole and both end portions of the air diffusing pipe are inserted. Is provided so as to project to the outside of the casing, and a pipe joint communicating with a gas supply source for diffused air is externally fitted and attached to one end of the projecting air diffuser, and the other end of the projecting air diffuser is attached. A plug body or a pipe joint is externally fitted to and attached to, and the diffuser pipe is locked to the casing in the axial direction by the pipe joint at the one end and the plug body or the pipe joint at the other end.
With the pipe joint, which is the piping member itself,
It is mounted and fixed .

According to a second aspect of the present invention, there is provided an air diffusing tube mounting structure in a submerged membrane separation apparatus, wherein a plurality of air diffusing tubes are arranged in parallel, and each of the air diffusing tubes is mutually connected by a pipe joint and a connecting short pipe attached to the ends. It is also connected to a gas supply source for aeration.

The diffusing pipe mounting structure in the submerged membrane separation apparatus according to the third aspect is such that the diffusing pipe is connected to a pipe joint provided at one end of the diffusing pipe, and the diffusing pipe is erected. Insert the upper end of the diffuser pipe into the pipe hole of the bracket provided on the outer surface of the casing, and then fit the pipe joint to the upper end of the diffuser pipe from above the pipe hole by fitting the pipe joint to the diffuser pipe. By locking the bracket in the axial direction, the pipe joint that is the piping member itself
The diffusing pipe is fixed to the bracket by hand, and the pipe joint provided at the upper end of the diffusing pipe is connected to the diffusing gas supply source.

The diffusing tube mounting structure in the submerged membrane separation apparatus according to the fourth aspect is such that the bracket is integrally formed on the outer surface of the casing. According to the above-mentioned configuration of the first aspect, the diffuser pipe can be locked to the casing by the configuration using the pipe member, which is the pipe joint communicating with the gas supply source for diffused gas and the separate pipe joint or plug body.

According to the second aspect of the present invention, a plurality of diffuser pipes arranged in parallel are connected to each other and to the diffuser gas supply source by a pipe joint and a connecting short pipe attached to the ends. Therefore, piping and the like can be reduced.

According to the third aspect of the present invention, the pipe joint, which is in communication with the diffuser pipe and the pipe joint that is in communication with the gas supply source for diffuser, and the bracket provided on the outer surface of the casing are used for diffuser. Since I tried to lock the pipe,
It is only necessary to provide a bracket as a separate fixing member.

According to the structure described in claim 4, since the bracket is formed integrally with the casing, the structure of the device is simplified.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG.
3 to FIG. 3 will be described. Immersion type membrane separator 2
1 is installed by immersing it in the water 23 to be treated in the treatment tank 22, and is a flat plate-shaped filtration membrane cartridge 2 arranged vertically in the upper part of a box-frame-shaped case 24 having an opening at the top and bottom.
5 are arranged in parallel at regular intervals, and below the membrane cartridge 25, an air diffusing pipe 27 communicating with an air supply source such as a blower 26 outside the tank is arranged.

The membrane permeated liquid outlet pipe 28 communicating with the membrane permeated liquid outlet of the filtration membrane cartridge 25 is located at a position slightly above the upper end of the filtration membrane cartridge 25, and inside the storage tank 29 provided adjacent to the treatment tank 22. It opens under atmospheric pressure.

Inside the storage tank 29, the membrane permeated liquid outlet tube 2
A drainage pipe 31 for discharging the membrane permeated liquid 30 sent from the outside of the tank is opened, and the drainage pipe 31 has a drainage pump 32.
Is installed.

The case 24 has a pair of slit panels 34, 35 formed in a vertical direction with a predetermined number of slits 33 for holding the arrayed membrane cartridges 25, and a pair of side panels 36 connecting the slit panels 34, 35. , 3
7 and 7.

At appropriate positions of the slit panels 34 and 35, a stopper 3 for supporting the lower end of the membrane cartridge 25 is provided.
8 are provided, and openings 36a, 37a through which the circulating water flow generated by the air diffuser 27 flows are formed in the lower portions of the side panels 36, 37.

The filtration membrane cartridge 25 is constructed in substantially the same manner as the conventional one described above, and the filtration membranes 40 are disposed on both surfaces of the filtration plate 39, and the space between the filtration plate 39 and the filtration membrane 40 or the filtration plate 40. The membrane permeate outlet 41 communicating with the membrane permeate flow path (not shown) formed inside 39 also has a filter plate 39.
Is formed in.

Above the filtration membrane cartridge 25, there is provided a collecting pipe 42 communicating with the membrane permeated liquid outlet 41, and the above-mentioned membrane permeated liquid outlet pipe 28 communicates with this collecting pipe 42. The operation of the above configuration will be described.

Since the membrane permeated liquid outlet pipe 28 is opened under the atmospheric pressure at a position above the upper end of the filtration membrane cartridge 25, the liquid level of the liquid to be treated 22 in the treatment tank 21 is the upper end of the filtration membrane cartridge 25. The filtration membrane cartridge 25 is maintained above, and the filtration membrane cartridge 25 is kept immersed in the liquid 22 to be treated.

Then, in the state where the filtration membrane cartridge 25 is immersed, the water head from the liquid surface of the liquid to be treated 22 to the opening of the membrane permeated liquid outlet pipe 28, that is, the liquid surface of the liquid to be treated 22 of the filtration membrane cartridge 25. Filtration is performed by the filtration membrane cartridge 25, with the head pressure from the upper end to the position above as the filtration driving pressure.

The membrane permeated liquid 30 that has permeated the filtration membrane 40 of the filtration membrane cartridge 25 flows out of the filtration membrane cartridge 25 through the membrane permeated liquid outlet 41, and passes through the collecting pipe 42 and the membrane permeate outlet pipe 28. After flowing into the storage tank 29 and being stored in the storage tank 29, the water is appropriately discharged from the water distribution pipe 31 by driving the drainage pump 32.

Next, the mounting structure of the air diffusing tube 27 in the above-mentioned submerged membrane separating apparatus 21 will be described in detail. Piping holes 34a, 35a are formed in the lower portions of the slit panels 34, 35, and the two air diffusers 27 are inserted into these piping holes 34a, 35a so that both side end portions 27a, 27b are the casing 24.
Is provided so as to project to the outside. The L-shaped pipe joint 4 is attached to one end 27a of each of the projecting air diffusers 27, respectively.
3 and the T-shaped pipe joint 44 are externally fitted and attached, and the plug body 45 is externally fitted and attached to the other end 27b of each of the projecting air diffusers 27. As a result, the L-shaped pipe fitting 4
One of the air diffusers 27 is locked by 3 and the plug 45, and the other air diffuser 27 is locked by the T-shaped pipe joint 44 and the plug 45 to the slit panels 34, 35 (that is, the casing 24) in the axial direction. ing.

The L-shaped pipe joint 43 and the T-shaped pipe joint 44 are connected to each other by a connecting short pipe 46, and the T-shaped pipe joint 44 is connected via a connecting short pipe 47 to provide an L-shaped pipe joint 48. An air diffuser pipe 49 is erected by connecting one end to the L-shaped pipe joint 48.

The diffusing pipe 49 is inserted into a pipe hole 50a formed in a bracket 50 having the other end portion integrally formed with the slit panel 34, and a pipe joint 51 is fitted outside the pipe hole 50a. It is mounted in a state and is locked to the bracket 50 in the axial direction. Pipe fitting 5
A diffuser pipe 52 communicating with the blower 26 is connected to the blower 1.

According to the above construction, the L-shaped pipe joint 43,
Diffusing pipe 2 using the T-pipe fitting 44
Since 7 can be mounted and fixed, no special fixing member is required.

The short pipe 4 connects the L-shaped pipe joint 43 and the T-shaped pipe joint 44 attached to the one end 27a, 27a of the air diffuser.
6 and the T-type pipe joint 44 and the connecting short pipe 4
Since the diffuser pipe 49 communicating with the blower 26 is connected via the 7, L-shaped pipe joint 48, the diffuser pipes 27, 27 are connected by one diffuser pipe 49 and one blower 26.
A gas for aeration can be supplied to the.

Further, the air diffuser pipe 4 is provided by the bracket 50 and the pipe joint 51 provided on the outer surface of the slit panel 34.
Since 9 can be locked and maintained in an upright state, the diffuser pipe 49
Can be treated as an integral part of the casing 24,
At this time, since the bracket 50 is formed integrally with the slit panel 34, the device configuration is simple.

When arranging three or more air diffusers, for example, as shown in FIG. 4, one end portion of each air diffuser protruding outside the casing 24 is provided with an L-shaped pipe joint 53, respectively.
T-type pipe joint 54 and L-type pipe joint 55 are externally fitted and mounted,
A plug (not shown) is externally fitted and attached to the other end of each air diffuser to connect the L-shaped pipe joint 53, the T-shaped pipe joint 54, and the L-shaped pipe joint 55 to each other. 57, a T-shaped pipe joint 58 is connected, one end is connected to the T-shaped pipe joint 58, and an air diffuser pipe 49 is erected.

Although not shown, the other end of each air diffuser in the above configuration may be connected to each other by a pipe joint and a connecting short pipe instead of the plug, and in that case, each air diffuser The pressure in the pipe can be equalized.

As a matter of course, also in the case where only one air diffuser is provided, the air diffuser can be attached to the casing 24 by being locked in the same manner as described above.

[0036]

As described above, according to the present invention, when the air diffusing pipe is locked in the casing, the air diffusing pipe is inserted into the pipe hole formed in the casing and the air diffusing pipe protruding to the outside of the casing. The pipe member itself, which is a pipe joint, is provided by externally fitting a pipe joint communicating with the gas supply source for diffused gas and a separate pipe joint or a plug body to the one end and the other end, respectively. The air diffuser can be attached and fixed using.

When a plurality of air diffusers are installed in parallel, the pipe joints attached to the ends of the air diffusers are connected to each other by connecting short pipes so that a pipe or the like communicating with the gas supply source for air diffuser can be provided. It is possible to reduce the amount of gas, and it is possible to supply the gas for diffusion by a single gas supply source for diffusion.

When the diffusing pipe is erected, the upper end is inserted into the pipe hole of the bracket provided on the outer surface of the casing, and the pipe joint communicating with the diffusing gas supply source is attached to the upper end. By fitting and mounting, the air diffuser pipe can be locked to the bracket and maintained in the upright state, and the bracket may be provided as a separate fixing member. Such a diffuser pipe can be handled as an integral part of the casing.

At this time, the structure of the apparatus can be simplified by integrally molding the bracket with the casing.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a state in which an immersion type membrane separation device according to an embodiment of the present invention is installed in a processing tank.

FIG. 2 is a partially cutaway perspective view showing the overall configuration of the immersion type membrane separation device of FIG.

FIG. 3 is a vertical cross-sectional view showing the overall configuration of the immersion type membrane separation device.

FIG. 4 is a side view of an essential part showing an immersion type membrane separation device according to another embodiment of the present invention.

FIG. 5 is a partially cutaway perspective view showing the overall configuration of a conventional immersion type membrane separation device.

[Explanation of symbols]

21 Immersion type membrane separator 24 casing 25 filtration membrane cartridge 26 Blower 27 Air diffuser 27a One end 27b other end 33 slits 34,35 slit panel 34a, 35a Piping hole 43 L type fitting 44 T type fitting 45 stopper 46 Communication short pipe 47 Communication short pipe 48 L type pipe fitting 49 Air diffuser 50 bracket 50a Piping hole 51 fittings 53,55 L type fitting 54,58 T type pipe fitting 56,57 Communication short pipe

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kiyoshi Izumi               2-47 Shikitsuhigashi, Naniwa-ku, Osaka-shi, Osaka               KUBOTA Co., Ltd. (72) Inventor Masahiro Yata               2-47 Shikitsuhigashi, Naniwa-ku, Osaka-shi, Osaka               KUBOTA Co., Ltd. (72) Inventor Narushi Masaharu               2-47 Shikitsuhigashi, Naniwa-ku, Osaka-shi, Osaka               KUBOTA Co., Ltd. (72) Inventor Hidehiko Sakai               2-47 Shikitsuhigashi, Naniwa-ku, Osaka-shi, Osaka               KUBOTA Co., Ltd.                (56) Reference JP-A-7-275669 (JP, A)                 JP-A-7-772 (JP, A)                 JP-A-8-71585 (JP, A)                 JP-A-7-136470 (JP, A)                 Actual Kaihei 7-9491 (JP, U)

Claims (4)

(57) [Claims] 1. A plurality of slits are vertically formed on inner surfaces of opposite side walls of a casing, and the plurality of filtration membrane cartridges are arranged in parallel by being inserted into the respective slits, and the plurality of filtration membrane cartridges are scattered below the filtration membrane cartridges. In a submerged membrane separation device in which a trachea is arranged, a pipe hole is formed by penetrating both side walls having the slit, and the diffuser pipe is inserted into the pipe hole and both ends of the diffuser pipe protrude outside the casing. A pipe joint communicating with the gas supply source for air diffusion is externally fitted to one end of the protruding air diffuser, and a plug or pipe joint is attached to the other end of the protruding air diffuser. By fitting and fitting, the diffuser pipe is locked to the casing in the axial direction by the pipe joint at the one end and the plug or pipe joint at the other end.
Attach the air diffuser to the casing with the pipe joint that is the pipe member itself.
A structure for mounting an air diffusing tube in a submerged membrane separation device characterized by the above. 2. A plurality of air diffusers are arranged in parallel, and each air diffuser is connected to each other and to a gas supply source for air diffuser by a pipe joint and a connecting short pipe attached to the ends. Item 1
An attachment structure of an air diffuser in the immersion type membrane separation apparatus described. 3. An air diffuser pipe is erected by connecting to a pipe joint provided at one end of the air diffuser pipe, and an upper end portion of the air diffuser pipe is connected to a pipe hole of a bracket provided on an outer surface of the casing. Insert and fit the pipe fitting to the upper end of this air diffuser pipe from above the pipe hole, and lock the air diffuser pipe on the bracket in the axial direction. Dispersed with a pipe fitting
The pipe for air is fixed to a bracket, and the pipe joint provided at the upper end of the pipe for diffusion is connected to a gas supply source for diffusion, according to claim 1 or 2. Attachment structure of air diffuser in submerged membrane separator. 4. The attachment structure of an air diffusing tube in a submerged membrane separation apparatus according to claim 3, wherein the bracket is integrally formed on the outer surface of the casing.