JPH0660428U - Liquid collection structure in membrane separation unit - Google Patents

Abstract

(57) [Summary] [Structure] The header tube 30 is fixed to the main body casing 24, and the suction port 29 is provided on the upper end surface of each membrane module 25.
The suction port 29 of each membrane module 25 and the header tube 30 were connected via a suction hose 35. Each membrane module 25
The suction port 29 is provided at a position close to the header tube 30. The suction ports 29 of the adjacent membrane modules 25 were provided at positions on the opposite sides alternately and close to the header tube 30. [Effect] The membrane separation unit 2 can be obtained by simply disconnecting the header tube 30 and the suction tube 33 during maintenance or the like.
3 can be taken out of the reaction tank 22. Reaction tank 22
It is possible to shorten the suction hose 35 that is deteriorated by coming into contact with the water to be treated therein, and suppress the occurrence rate of troubles in the suction hose 35. Since the circumference of the suction port 29 is widened, connection work can be easily performed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid collecting structure of a membrane separation unit, and more particularly, to a connection structure of each membrane module of the membrane separation unit and a header pipe.

[0002]

[Prior art]

 A conventional membrane separation unit is, for example, as shown in FIG. 7, and has a structure in which it is immersed and arranged in a reaction tank. In FIG. 7A, the main body casing 1 is composed of an upper casing 1a and a lower casing 1b, and the inside of the main body casing 1 is directed from the lower opening of the lower casing 1b toward the upper opening of the upper casing 1a. The raw water 2 is distributed.

Inside the upper casing 1 a, a plurality of membrane modules 3 are arranged by inserting the membrane surfaces along the vertical direction while forming an appropriate gap between the membrane surfaces of the respective membrane modules 3. An air diffuser 5 for aerating the air 4 is arranged inside the lower casing 1b.

As shown in FIG. 7B, each membrane module 3 is a filter plate 6 whose front and back are covered with a filtration film 7 such as an ultrafiltration membrane or a microfiltration membrane. A permeated liquid flow path 8 is provided in the interior of the filter, and a gap forming material 9 for forming a flow path is interposed between the filter plate 6 and the filtration membrane 7.

As shown in FIG. 8, the permeate flow path 8 of each membrane module 3 is connected to a header tube 11 by a tube 10 in a state where the membrane module 3 is inserted into the main body casing 1, and the tube 10 of each membrane module 3 is a header. It is detachably connected to the pipe 11. The header pipe 11 is fixed to the wall surface of the reaction tank or the like, and communicates with the suction source via the suction pipe.

[0006]

[Problems to be solved by the device]

 However, in the above-described conventional configuration, the membrane separation unit requires periodic maintenance in order to remove the cake layer adhering to the membrane surface of the membrane module 3. At that time, it is necessary to remove the tubes 10 of each membrane module 3 from the header tube 11 one by one before pulling out the membrane module 3 from the main body casing 1. Since there are many membrane modules 3, The work was troublesome. In addition, it is necessary for workers to enter the work in an unsanitary reaction tank, and improvement of the working environment is desired.

The present invention solves the above problems, and an object thereof is to provide a liquid collecting structure in a membrane separation unit that does not require disconnection of the header tube and the membrane module at the time of maintenance or the like.

[0008]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a header tube that is detachably connected to a suction tube in a membrane separation unit in which a plurality of membrane modules are arranged in parallel with each other in a vertical direction in a main body casing. A structure that is fixed to the main body casing, has a suction port that communicates with the internal permeate flow path on the upper end surface of each membrane module, and connects the suction port of each membrane module and the header tube via a suction hose Is.

Further, the header tube is fixed to the main body casing at a position corresponding to one side of the membrane module, and the suction port of each membrane module is provided at a position close to the header tube.

In addition, the header tube is formed in a U shape so as to sandwich both sides of the membrane module and fixed to the body casing, and the suction ports of the adjacent membrane modules are close to the header tube on opposite sides alternately. The configuration is provided at the position where

[0011]

With the above-described configuration, the permeated liquid that has permeated the filtration membrane of each membrane module and has flowed into the permeated liquid flow channel flows into the header pipe through the suction hose, and after being collected, the permeated liquid is passed through the suction pipe. It leaks out through.

When the membrane separation unit is taken out of the reaction tank at the time of maintenance, etc., simply disconnect the header tube and the suction tube, and handle each membrane module integrally while communicating with the header tube. As a result, it is not necessary to remove the tubes that connect the membrane modules and the suction pipes from the suction pipes one by one as in the conventional case, and the working environment can be improved.

Further, the suction hose can be shortened by providing the suction port close to the header tube. As a result, it is possible to suppress the occurrence rate of the hose failure of the suction hose that deteriorates due to contact with the water to be treated in the reaction tank, and to reduce the factor that obstructs the flow of the water to be treated in the reaction tank.

Further, since the suction ports are provided at opposite positions for each adjacent membrane module, when connecting the suction hose to the suction port, there is no other suction port on both sides of the suction port. The connection work can be easily performed, and the permeated liquid of the plurality of membrane modules arranged in the main body casing is divided into the left and right header tubes to be distributed to ensure a smooth suction action of the permeated liquid. .

[0015]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 and FIG. 2, a membrane separation unit 23 is immersed in a reaction tank 22 in which the water to be treated supply 21 is opened, and a plurality of membrane modules 25 are arranged inside a main body casing 24 of the membrane separation unit 23. They are arranged in parallel in the vertical direction with an appropriate gap.

The membrane module 25 is formed by adhering a filtration membrane 27 to the front and back surfaces of a filter plate 26, and a permeate flow channel 28 is provided inside the filter plate 26. The filter plate 26 is made of a resin material, and the filtration membrane 27 is an ultrafiltration membrane or a microfiltration membrane. The permeated liquid flow path 28 is opened on the front and back surfaces of the filter plate 26, and is also opened on the upper end surface of the filter plate 26 as a suction port 29.

A header pipe 30 is fixed to one side of the main body casing 24, and a connection port 31 is provided in the header pipe 30 at a position corresponding to each membrane module 25. Further, the header pipe 30 communicates with a suction pipe 33 via a connection hose 32, and the suction pipe 33 is provided with a suction pump 34.

A suction hose 35 that connects the permeate flow path 28 of the membrane module 25 and the header pipe 30 is detachably connected to the suction port 29 of each membrane module 25 and the connection port 31 of the header pipe 30. Is provided.

The operation of the above configuration will be described below. The water to be treated 36 that has flowed into the reaction tank 22 from the water to be treated supply pipe 21 is a tank due to the rising agitated flow generated by the air aerated from the air diffuser (similar to the conventional one) provided at the bottom of the membrane separation unit 23. Circulate inside. In this state, the water to be treated 36 in the reaction tank 22 is subjected to solid-liquid separation, and the permeated liquid that has permeated the filtration membrane 27 of the membrane module 25 and has flowed into the permeated liquid flow path 28 is sucked by the suction pump 34 into the suction pipe 33. Take out through.

At this time, the permeate that has flowed into the permeate flow path 28 of each membrane module 25 flows into the header pipe 30 via the suction hose 35, and after collecting water, passes through the suction pipe 33 to the outside. Spill to.

When the membrane separation unit 23 is taken out of the reaction tank 22 at the time of maintenance or the like, by removing the connection hose 32 from the header pipe 30 or the connection hose 32 from the suction pipe 33, the header pipe By disconnecting the suction tube 33 from the suction tube 33, each membrane module 25 can be handled integrally in a state of communicating with the header tube 30. It is not necessary to remove the tubes that connect the tubes one by one from the suction tube, and the working environment can be improved.

When pulling out each membrane module 25 from the main body casing 24, the suction hose 35 is removed at the suction port 33 or the connection port 31. 3 to 4, the header tube 30 is fixed to the main body casing 24 at a position corresponding to one side of the membrane module 25, and the suction port 33 of each membrane module 25 is close to the header tube 30. It is provided at the position.

In this structure, since the suction port 33 is provided close to the header tube 30, the suction hose 35 can be shortened. As a result, it is possible to suppress the occurrence rate of the failure of the suction hose 35 which is deteriorated by coming into contact with the water to be treated 36 in the reaction tank 22 and to inhibit the circulation flow of the water to be treated 36 in the reaction tank 22. Can be reduced.

5 to 6, the header tube 30 is formed in a U shape so as to sandwich both sides of the membrane module 25 and fixed to the main body casing 24, and the suction port 33 of the adjacent membrane module 25 is formed. Are provided at positions close to the header tube 30 on opposite sides alternately.

In this configuration, since the suction ports 33 are provided at the positions opposite to each other for each adjacent membrane module 25, when connecting the suction hose 35 to the suction ports 33, the suction ports 33 are not provided at both side positions of the suction ports 33. Since the suction port 33 of the adjacent membrane module 25 does not exist, the connection work can be easily performed, and the permeated liquids of the plurality of membrane modules 25 arranged in the main body casing 24 are separately distributed to the left and right header tubes 30. As a result, a smooth suction action of the permeated liquid can be secured.

[0026]

[Effect of device]

 As described above, according to the present invention, by fixing the header tube to the main body casing, the header separation tube and suction tube are simply disconnected during maintenance, etc., and the membrane separation unit is removed from the reaction tank. Since it can be taken out, it is possible to eliminate the complicated work in the reaction tank as in the past.

Further, by making the suction port close to the header pipe, it is possible to shorten the suction hose which is deteriorated by coming into contact with the water to be treated in the reaction tank, and suppress the occurrence rate of trouble in the suction hose. In addition, it is possible to reduce the factors that hinder the flow of the water to be treated in the reaction tank.

In addition, by providing the suction ports at positions opposite to each other for each adjacent membrane module, the circumference of the suction port becomes wider, and when connecting the suction hose to the suction port, connection work can be easily performed. By smoothly distributing the permeated liquid of the plurality of membrane modules arranged in the main casing into the left and right header tubes, a smooth suction action of the permeated liquid can be ensured.

[Brief description of drawings]

FIG. 1 is a plan view of a membrane separation unit according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing the connection structure of the membrane modules in the example.

FIG. 3 is a plan view of a membrane separation unit according to another embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing the connection structure of the membrane modules in the example.

FIG. 5 is a plan view of a membrane separation unit according to still another embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view showing the connection structure of the membrane modules in the example.

7A and 7B are perspective views of a conventional membrane separation unit and a membrane module, respectively.

FIG. 8 is a perspective view showing a main part of a conventional membrane separation unit.

[Explanation of symbols]

 23 Membrane Separation Unit 24 Main Body Casing 25 Membrane Module 29 Suction Port 30 Header Pipe 31 Connection Port 33 Suction Pipe 35 Suction Hose

Claims (3)

[Scope of utility model registration request] 1. In a membrane separation unit in which a plurality of membrane modules are arranged in parallel in the vertical direction with a proper gap in the main body casing, a header pipe detachably connected to a suction pipe is fixedly provided in the main casing. A suction port communicating with an internal permeate flow path is provided on the upper end surface of the membrane module, and the suction port of each membrane module and the header pipe are connected via a suction hose, whereby a liquid collecting structure in a membrane separation unit. . 2. The header tube is fixed to the main body casing at a position corresponding to one side of the membrane module, and the suction port of each membrane module is provided at a position close to the header tube. Of liquid collection in the membrane separation unit of the above. 3. A position where a header tube is formed in a U shape so as to sandwich both sides of the membrane module and is fixed to a main body casing, and suction ports of adjacent membrane modules are alternately opposite sides and close to the header tube. It has been provided in 1.
A liquid collection structure in the described membrane separation unit.