JPH0556294U - Water treatment equipment - Google Patents

Abstract

(57) [Summary] [Structure] A membrane separation device 22 is immersed in an aeration tank 21, and a strainer 27 is inserted in the middle of a suction pipe 24 or a collecting pipe 25 that connects the membrane separation device 22 and a suction pump 26. I dressed up. The body of the strainer 27 is formed of a transparent body that allows the inside to be seen through. [Effect] Even if the membrane separation device 22 is damaged due to some reason, the strainer 27 filters the water 33 to be treated.
It is possible to prevent the water 33 to be treated which has flowed into the suction pipe 24 from flowing out to the suction pump 26 and the next system as it is. Also,
By visually observing through the transparent body whether or not the strainer 27 has captured the solid content, it is possible to recognize whether or not the membrane separation device 22 is damaged.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a water treatment device that uses a membrane separation device to perform coagulation treatment, activated sludge treatment, sludge concentration, RO pretreatment and the like.

[0002]

[Prior Art]

 Conventionally, as shown in FIG. 3, in a water treatment device, a membrane separation device 2 is immersed in an aeration tank 1, and the membrane separation device 2 includes a plurality of submerged membrane modules 3 formed of ceramic tubes or the like. It consists of. Further, each submerged membrane module 3 is connected to a suction pump 6 via a suction pipe 4 and a collecting pipe 5 which are in communication with each other, and an air diffuser 8 which communicates with a blower 7 is provided below the membrane separation device 2. It is arranged. Further, a raw water supply pipe 9 is opened at the upper part of the aeration tank 1.

Then, while the raw water is supplied to the aeration tank 1 from the raw water supply pipe 9, the suction pump 6 is driven to pass the treated water 10 in the aeration tank 1 through each submerged membrane module 3 of the membrane separation device 2. Separate the liquid. The permeated liquid that has permeated each of the immersion type membrane modules 3 merges with the collecting pipe 5 through each suction pipe 4, and then flows out to the next system through the suction pump 6. Further, the air 11 sent by the blower 7 is aerated from the air diffuser 8 upward, and the rising agitated flow generated by the aerated air 11 causes the membrane surface of each submerged membrane module 3 of the membrane separator 2 to be aerated. Wash and remove the cake layer adhering to the film surface.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional configuration, when the submerged membrane module 3 is damaged for some reason, the treated water 10 flowing in from the abnormal submerged membrane module 3 passes through the healthy submerged membrane module 3. In addition, there is a problem of mixing in the permeated liquid, and there is currently no means for detecting an abnormality in the submerged membrane module 3. Therefore, if the detection of an abnormality is delayed, there is a problem that the water to be treated will flow out to the next system.

The present invention solves the above-mentioned problems, and detects that an abnormality has occurred in the membrane separation device, and even if an abnormality occurs in the membrane separation device, it is possible to prevent the water to be treated from directly flowing to the next system. It aims at providing the water treatment equipment which can be.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the water treatment device of the present invention comprises a membrane separation device which is immersed in an aeration tank and solid-liquid separates the water to be treated in the tank, and a suction pump which applies a negative pressure to the membrane separation device. A strainer is provided in the middle of a pipe line communicating with and.

Further, the strainer main body is formed of a transparent body through which the inside can be seen through.

[0008]

[Action]

 With the above configuration, the suction pump is driven and the water to be treated in the aeration tank is solid-liquid separated by the membrane separator. The permeated liquid that has passed through the membrane separation device flows into the suction pump through the pipeline and strainer, and then flows out from the suction pump to the next system.

Therefore, even if the membrane separation device is damaged for some reason and the water to be treated flows into the membrane separation device from the damaged portion, the strainer provided in the middle of the pipeline filters the water to be treated. It is possible to prevent the untreated water that has flowed into the pipeline from flowing out to the suction pump and the next system as it is.

Further, by forming the strainer main body with a transparent body, it is possible to visually confirm whether or not the strainer is capturing solids, and in the case where the strainer contains solids, the membrane separation device Judge as damaged.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, a membrane separation device 22 is disposed inside the aeration tank 21, and the membrane separation device 22 is composed of a plurality of immersion type membrane modules 23 formed of ceramic tubes or the like. A suction pipe 24 is provided so as to communicate with the inside of each submerged membrane module 23, each suction pipe 24 communicates with a collecting pipe 25, and the collecting pipe 25 communicates with a suction side of a suction pump 26.

Further, a strainer 27 is provided in the middle of each suction tube 24, and the strainer 27 has a screen 29 inserted and arranged inside a transparent main body 28 made of a resin material. This screen 29 has a hole diameter of Φ1.4 mm and is about 11 mesh or less.

An air diffuser 30 is arranged below the membrane separation device 22, and a blower 31 is provided in communication with the air diffuser 30. Further, a raw water supply pipe 32 for supplying raw water is opened at the upper part of the aeration tank 21.

The operation of the above configuration will be described below. Raw water is supplied from the raw water supply pipe 32 to the aeration tank 21, the suction pump 36 is driven to apply a negative pressure to each submerged membrane module 23 of the membrane separation device 22, and the water to be treated stays inside the aeration tank 21. 33 is solid-liquid separated.

Then, the permeated liquid that has permeated the submerged membrane module 23 joins the collecting pipe 25 through the suction pipe 24 and the strainer 27, and then flows out to the next system through the suction pump 26. On the other hand, the separated solid content forms a cake layer on the membrane surface of the immersion membrane module 23 and adheres thereto.

Further, air is sent to the air diffuser 30 by the blower 31, and the air is aerated from the air diffuser 30 toward the upper membrane separation device 22. The rising stirring flow generated by the aerated air cleans the membrane surface of each submerged membrane module 23 and separates the cake layer adhering to the membrane surface, so that the submerged membrane module 23 is not clogged.

Even if the submerged membrane module 23 is damaged and the water 33 to be treated flows into the suction pipe 24, each strainer 27 filters the water 33 to be treated by the screen 29. The treated water 33 does not flow through the collecting pipe 25 and the suction pump 36 as it is to the next system.

Furthermore, since the body 28 of the strainer 27 is transparent, it is possible to prevent the screen 29 from capturing solids when the submerged membrane module 23 is damaged and the water 33 to be treated flows into the strainer 27. Can be seen. Therefore, by visually recognizing in which strainer 27 the solid content is retained, it is possible to recognize which immersion-type membrane module 23 is damaged.

Although the strainer 27 is provided in the middle of each suction pipe 24 in the present embodiment, it may be installed in the middle of the collecting pipe 25.

[0020]

[Effect of the device]

 As described above, according to the present invention, even if the membrane separation device is damaged for some reason, the strainer provided in the middle of the pipeline filters the treated water, so that the treated water that has flowed into the pipeline is sucked as it is. It can be prevented from flowing out to the pump and the next system.

Further, by visually observing through the transparent body whether or not the strainer has captured solids, it is possible to recognize whether or not the membrane separation device is damaged.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a water treatment device showing an embodiment of the present invention.

FIG. 2 is a sectional view of a strainer according to the same embodiment.

FIG. 3 is an overall configuration diagram of a conventional water treatment device.

[Explanation of symbols]

 21 Aeration Tank 22 Membrane Separation Device 24 Suction Pipe 25 Collecting Pipe 26 Suction Pipe 27 Strainer

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Toshio Kawanishi 1-247 Shikitsuhigashi, Naniwa-ku, Osaka City, Osaka Kubota Corporation

Claims (2)

[Scope of utility model registration request] 1. A strainer is provided in the middle of a pipe line that connects a membrane separation device that is immersed in an aeration tank to solid-liquid separate the water to be treated in the tank and a suction pump that applies a negative pressure to the membrane separation device. A water treatment device characterized in that the water treatment device is interposed. 2. The water treatment apparatus according to claim 1, wherein the strainer main body is formed of a transparent body through which the inside can be seen.