JPH10296253A - Wastewater treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clean easily the clogging of air diffusion pipes by providing a membrane separation device for retaining the air diffusion pipes on frames of a hollow membrane unit, being carried out freely and having air diffusion sections of the air diffusion pipes positioned below the membrane unit. SOLUTION: A membrane 3 is provided between frames 2 facing each other to constitute a hollow membrane unit 1, and air diffusion pipes 4 are retained on respective frames 2 of the membrane unit 1, and respective air diffusion pipes 4 are communicated each other through air diffusion sections 5. The air diffusion sections 5 are positioned below the hollow membrane unit 1 and connected with removably the air diffusion pipes by joints to constitute a membrane separation device A to be carried out freely. The air diffusion pipes 4 can be carried out simultaneously when a casing 8 is carried out of a treatment tank by the arrangement to remove easily the clogging of air diffusion vent holes of the air diffusion sections 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus, and can easily clean an air diffuser.

[0002]

2. Description of the Related Art Conventionally, a sewage treatment apparatus disclosed in Japanese Patent Application Laid-Open No. 7-275669 is known. This sewage treatment apparatus is provided with a diffuser below the membrane separator as shown in FIGS. 1, 2 and 3, and blows air downward from the diffuser.

[0003]

However, this conventional sewage treatment apparatus has not been designed to cope with clogging of the air diffuser. .

The present invention has been made in view of the above point, and has a structure in which a diffuser tube is held in a removable membrane separation device, and can easily clean a clogged diffuser tube. is there.

[0005]

In the sewage treatment apparatus according to the first aspect of the present invention, a plurality of flat membrane units are installed in a treatment tank in parallel in the vertical direction, and an air diffuser is provided below the membrane unit. In the sewage treatment apparatus, a membrane is provided between the frames to form a hollow membrane unit, and the frame of the membrane unit holds the air diffuser and the diffuser of the air diffuser is positioned below the membrane unit. Characterized in that it is provided with a removable membrane separation device.

[0006] The sewage treatment apparatus according to claim 2 of the present invention comprises:
2. The sewage treatment apparatus according to claim 1, wherein the membrane unit is installed in a vertically open casing disposed in the treatment tank, and the frame unit of the membrane unit is formed of an air diffuser and is capable of being carried out. It is characterized by comprising a membrane separation device.

[0007] The sewage treatment apparatus according to claim 3 of the present invention comprises:
The sewage treatment apparatus according to claim 1, further comprising a transportable membrane separation device in which an air diffuser of an air diffuser is detachably connected by a joint.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, A is a membrane separation device,
1 is a membrane unit. The membrane unit 1 is configured by providing the membranes 3, 3 between the frames 2, 2, and is a hollow body. This membrane unit 1 holds diffuser tubes 4, 4 in frames 2, 2, and the diffuser tubes 4, 4 are communicated by a diffuser 5. The diffuser 5 is located below the membrane unit 1, and the diffuser 5 is detachably connected to the diffuser 4 by a joint 17. Reference numeral 7 denotes a suction nozzle provided on the upper frame 6 of the membrane unit 1. This membrane unit 1 is installed on a casing 8 which is open up and down in parallel with the up and down direction. 3, 4 and 5 show a state in which the air diffuser 4 is held in the frames 2 and 2 of the membrane unit 1, and the membrane unit 1 forms a hollow portion 9 by the membranes 3 and 3.

The membranes 3 and 3 perform a filtering action. The hollow portion 9 is sucked by the suction nozzle 7 to make the pressure reduced, and the treated water is filtered by the membranes 3 and 3 and introduced into the hollow portion 9 and sucked. It is discharged to the outside by the nozzle 7. The film bodies 3, 3 are formed of felt having a fine hole, a synthetic resin film, or the like.

FIG. 2 shows a sewage treatment apparatus provided with a membrane separation device A, in which the side wall of the casing 8 is removed. The membrane separation apparatus A installed in the treatment tank 10 of the sewage treatment apparatus is immersed in the sewage 11, the blower 12 is connected to the diffuser 4, and the suction pump 13 is connected to the suction nozzle 7. 14 is a sewage introduction pipe, and 15 is a treated water storage tank. In this sewage treatment apparatus, the air from the blower 12 is diffused from the diffusing section 5 of the diffusing pipe 4 of the membrane separation apparatus A, and the hollow section 9 of the membrane unit 1 is sucked from the suction nozzle 7 by the suction pump 13. The air diffused from the diffuser 5 rises on the surfaces of the membranes 3 in a mixed state of sewage and gas and liquid. At this time, the surfaces of the films 3, 3 are cleaned. When the sewage rises in a gas-liquid mixed state, the sewage swirls and the inflow port 16 at the lower part of the casing 8 flows in, and the sewage 11 swirls in the treatment tank 10. When suctioned by the suction pump 13, the treated water is filtered and introduced into the hollow portion 9 in the membrane unit 1, and is discharged from the suction nozzle 7 into the treated water storage tank 15.

The diffusing portion 5 of the diffusing tube 4 is formed of small diffusing holes and is apt to be clogged. In this membrane separation apparatus A, when the casing 8 is carried out of the processing tank 10, The air diffuser 4 can also be carried out at the same time, so that clogging of the air diffuser holes of the air diffuser 5 can be easily removed. Further, since the air diffuser 4 and the air diffuser 5 are detachably connected to each other via the joint 17, the clogging of the air diffuser 5 can be easily removed.

[0012]

According to the first aspect of the present invention, there is provided a sewage treatment apparatus in which a plurality of flat membrane units are installed in a treatment tank in parallel in the vertical direction and an air diffuser is provided below the membrane unit. In the apparatus, the membrane is provided between the frames to form a hollow membrane unit, and the air diffusion tube is held in the frame of the membrane unit, and the air diffusion portion of the air diffusion tube is positioned below the membrane unit, so that it is freely transportable. With the provision of such a membrane separation device, the clogging of the air diffuser of the air diffuser can be carried out easily, and the clogging can be easily removed.

[0013] The sewage treatment apparatus according to claim 2 of the present invention comprises:
2. The sewage treatment apparatus according to claim 1, wherein the membrane unit is installed in a vertically open casing disposed in the treatment tank, and the frame unit of the membrane unit is formed of an air diffuser and is capable of being carried out. Since the air diffuser also serves as the frame because of the provision of the membrane separation device, the use of members is more efficient.

[0014] The sewage treatment apparatus according to claim 3 of the present invention comprises:
2. The sewage treatment apparatus according to claim 1, further comprising a removable membrane separation device in which a diffuser portion of the diffuser tube is detachably connected by a joint. It can remove clogging of the part,
The clogging removal operation is easy.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a main part of a sewage treatment apparatus according to one embodiment of the present invention.

FIG. 2 is an explanatory diagram of the sewage treatment apparatus of the embodiment shown in FIG.

FIG. 3 is a front view of the membrane unit of the embodiment shown in FIG.

FIG. 4 is an explanatory longitudinal sectional view of the membrane unit shown in FIG. 3;

FIG. 5 is an explanatory cross-sectional view of the membrane unit shown in FIG. 3;

[Explanation of symbols]

 A membrane separation device 1 membrane unit 2 frame 3 membrane 4 air diffuser 5 diffuser 6 upper frame 7 suction nozzle

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Shin Shin, 1048, Kazuma, Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Inventor Hiroshi Kano 1048, Kazuma, Kazuma, Kadoma, Osaka

Claims (3)

[Claims] 1. A sewage treatment apparatus comprising a plurality of flat membrane units arranged in a vertical direction in a treatment tank and an air diffuser provided below the membrane units. A sewage treatment apparatus comprising a membrane separation device which comprises a membrane unit, wherein a diffuser tube is held in a frame of the membrane unit, and a diffuser portion of the diffuser tube is positioned below the membrane unit. 2. The sewage treatment apparatus according to claim 1,
A sewage treatment apparatus comprising a membrane unit installed in a casing open in the upper and lower sides disposed in a treatment tank, and further comprising a transportable membrane separation device comprising a frame body of the membrane unit formed of a diffuser tube. 3. The sewage treatment apparatus according to claim 1,
A sewage treatment apparatus provided with a removable membrane separation device in which a diffuser portion of a diffuser tube is detachably connected by a joint.