KR101713927B1 - Membrane bioreactors filter apparatus for cassette type - Google Patents

Abstract

The present invention relates to a filtration device of a separation membrane which may be immersed in a bioreactor in a wastewater treatment site to perform filtration. In the filtration device of the present invention, an air supply tube (24) connected to an air pump is connected to an air distribution tube (20) joined to a plurality of diffusers (22) at a lower part of a separation membrane support frame (2) to supply air; a spray unit (30) is installed above respective diffusers (22); and a discharge unit (34) protruded on the spray unit (30) is disposed below a gap between separation membrane modules (10) to release contaminants attached to the surface of a porous membrane (12). The separation membrane module (10) is a unit member configured to be detachable in a sliding fashion by using a plurality of upper and lower guide rails (4, 6) which form a left-right pair and face one another from an upper frame (8a) and a lower frame (8b) constituting the separation membrane support frame (2). By joining a treatment water guide hole (40) which supports upper and lower heads (14, 16) to one side of each of the separation membrane modules (10), the treatment water filtered through the porous membrane (12) is collected inside the upper and lower heads (14, 16) and sucked out through the treatment water guide hole (40). The treatment water guide hole (40) is connected to a suction pump at an upper part of the separation membrane support frame (2) and thereby joined to a water collecting tube (50), in which is installed a treated water discharge tube (54) for discharging the treatment water to the outside.

Description

 BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a filtration apparatus for an MBR separation membrane for a cassette type,

The present invention relates to a filtration apparatus for a cassette-type MBR separation membrane which is dipped in a biological reaction tank of a sewage treatment plant for filtration treatment.

In general, reverse osmosis has been developed as part of a seawater desalination program in the United States in the 1960s as a separation technology using separation properties of polymeric materials. By 1970, reverse osmosis membranes and modules of polymeric materials were developed and then other types of modules were developed and mass produced. Unlike the distillation technology, the membrane separation process has no phase change, so it is possible to save energy and simplify the process, thereby reducing the space occupied by the device. Membranes have been developed around reverse osmosis membranes and are widely applied to ultrafiltration, microfiltration, and nanofiltration.

Conventional membranes are of the spiral wound type, tubular type, hollow fiber type, plate type and frame type. Among them, the hollow type is a hollow fiber having a diameter of 0.2 to 2 mm, Since the hollow tube has a hollow tube shape, the membrane area ratio per unit volume of the hollow fiber membrane is very large as compared with other types of membranes. Thus, a high productivity is required. Another type of separation membrane requires a support capable of applying a polymer forming a separation membrane. Since the diameter is small, it can keep its own form and it does not require a separate support. However, suspended solids between the hollow fiber membranes made of one module can adhere to the surface of the membrane, blocking the flow of water, Once contaminated membranes are difficult to clean, they are difficult to use for processes with high membrane contamination, There is a disadvantage that it can be cut.

The hollow fiber separator can be used in a manner of being pressurized out of the hollow fiber membrane and sucked in the opposite direction. Also, the method of using the hollow fiber membrane in the activated sludge method used for the treatment of sewage and sewage has an external type which is externally circulated and a submerged type in which the module is directly immersed in the bioreactor. The external circulation type has a disadvantage that it consumes more energy than the immersion type.

Typically, MBR (Membrane Bio Reactor) process using submerged membrane module directly immerses the membrane module in the bioreactor and solids separation by membrane separates the treated water. In general, when the same amount of air is injected into the water under normal temperature and normal pressure conditions, the solubility of dissolved oxygen in the water depends on the specific surface area of the bubbles. As the bubbles become finer, the specific surface area increases and the solubility of dissolved oxygen increases. The loss is reduced and it is economical.

Meanwhile, in most MBR processes, the membrane module corresponding to the processing capacity is installed and fixed in a separate frame when the membrane module is immersed in the bioreactor.

Accordingly, the filtration by the membrane separates the treated water through the filtration pipe through the upper collecting process or the both-end collecting process depending on the type of the separating membrane module, and generates a shear force in the vertical direction on the surface of the separating membrane during solid- Continuous air infusion is achieved through the anomalous piping for the desorption of contaminants adhering to the surface and the oxygen supply for the microorganisms in the reaction tank.

Conventionally, the filtration piping and the acid piping have been used separately from the frame including the separation membrane module to attach the filtration piping and the acid piping to the frame. However, the frame structure is complicated due to the deposit, and the installation space is limited.

In addition, there is a problem that, when it is discharged to the outside of the bioreactor for repairing by washing or breakage of the separation membrane, there is a risk of damage to the attachment when re-immersed after washing or repairing.

As an example to overcome the above problems, Korean Patent No. 10-932739 entitled " Separation membrane unit with integral separation membrane frame structure with an aeration pipe and integral separation membrane module with a suction pipe " and Korean Patent No. 10-974912, A separation membrane frame structure and a separation membrane unit using the same ".

In the conventional separation membrane unit, an empty space is formed inside the separation membrane frame structure

So that the air bubbles flowing through the air piping are blown out into the acid gas through the acid piping and the solid wastes are collected through the filtration piping.

However, when the membrane module is immersed in the reactor, the membrane module can not be arranged compactly on the frame, and the degree of integration during filtration is decreased. Since the air tube is not sprayed properly on the membrane module, the air cleaning range is decreased. There is a problem that it decreases.

Further, since the frame and the separator module are fastened together as bolts, it is inconvenient for the operator to assemble and install the separator module, and it is difficult to separate and reinstall the separator module at the time of cleaning the separator module.

Further, since the treated water filtered by the suction operation of the hollow fiber membrane is collected through the upper head and discharged, the water treatment ability is poor.

Korean Patent No. 10-932739 entitled " Separation Unit with Separate Membrane Frame Structure and Suction Piping Monoblock Membrane Module " Korean Patent No. 10-974912 entitled " Piping integrated membrane frame structure and separator unit using the same "

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a separation membrane module which is submerged in a biological reaction tank of a sewage treatment plant to perform filtration treatment on a support frame in a compact manner to improve the degree of integration due to filtration treatment, And to provide a filtration apparatus for a cassette-type MBR separation membrane.

In addition, the present invention is characterized in that the air supplied from a plurality of air diffusers provided at the lower part of the support frame is uniformly sprayed into the space between the separation membrane modules through the respective spray units to desorb the contaminants attached to the surface of the hollow fiber membrane, And to minimize the sludge phenomenon of the MBR separation membrane for the cassette type.

In addition, the present invention improves collection efficiency by connecting the upper and lower heads of the separation membrane module of each unit member to one collection water pipe, and arranges the separation membrane modules in two rows on both sides of the collection water tube to easily increase the water treatment capacity And to provide a filtration apparatus for an MBR separation membrane for a cassette type capable of coping with such problems.

According to an aspect of the present invention, there is provided a separation membrane filtration apparatus that is dipped in a biological reaction tank of a sewage treatment plant and subjected to filtration treatment, wherein an air supply pipe (24) And a jetting unit 30 for jetting air is provided at an upper portion of each of the air diffusing pipes 22 so as to protrude from the jetting unit 30 The outflow portion 34 formed is disposed below the membrane module 10 so that the contaminants adhering to the surface of the hollow fiber membrane 12 are desorbed and the membrane module 10 has a separation membrane support frame The upper and lower frames 8a and 8b constituting the upper and lower guide rails 4 and 6 are slidably attached and detached to a plurality of upper and lower guide rails 4 and 6, , One side of each membrane module (10) The processing water filtered through the hollow fiber membrane 12 is joined to the upper and lower heads 14 and 16 by coupling the upper head 14 and the lower water head 16 to the lower head 16, The process water guide 40 is connected to a suction pump at an upper portion of the separation membrane support frame 2 and is connected to a process water discharge pipe 54 for discharging process water to the outside, And the water collecting pipe (50).

Disclosed is a separator module (10), which is compactly disposed in a separator supporting frame (2) to improve the degree of integration due to filtration, while a separator module (10) There is an easy effect.

Air supplied from a plurality of air diffusers 22 is uniformly sprayed into the space between the separation membrane modules 10 through the respective spray units 30 under the swirling flow to the surface of the hollow fiber membrane 12 The sludge phenomenon of the hollow fiber membrane 12 can be minimized.

The upper and lower heads 14 and 16 of the membrane module 10 of each unit member are communicated with each other through the one water collecting pipe 50 while being supported by the treated water guide 40, The separation membrane modules 10 for discharging the water through the water pipe 50 to increase the collection efficiency and to couple the separation membrane modules 10 to both sides of the separation membrane support frame 2 with the treatment water guide 40 are arranged in two rows to increase the water treatment capacity .

1 is a perspective view of a membrane filtration apparatus according to an embodiment of the present invention;
2 is a perspective view of a separation membrane support frame of the present invention,
FIG. 3 is a front structural view of the present invention,
4 is a bottom plan view of the present invention,
FIG. 5 is a view showing a combined structure of the separation membrane module and the treatment water guide according to the present invention,
6 is a schematic cross-sectional view of a separation membrane module and a treated water guide according to the present invention,
FIG. 7 is a view showing a coupling structure between the separation membrane module and the injection unit of the present invention,
8 is a configuration diagram of air injection of the injection unit of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and detailed description of known elements that may obscure the gist of the present invention will be omitted.

(A) of the present invention comprises a separation membrane support frame (2) for installing a separation membrane module (10) formed as a unit member, and a separation membrane support frame A plurality of air diffusers 22 mounted on a lower portion of the frame 2 and connected to an air distribution pipe 20 for distributing and supplying air to the air diffuser module 10; And an upper head 14 and a lower head 16 which are fixed in communication with the hollow fiber membrane 12 of the separation membrane module 10 in the separation membrane support frame 2 in a sliding manner The upper and lower guide rails 4 and 6 on the left and right sides and the upper and lower heads 14 and 16 of the separation membrane module 10 in a communicative manner to guide the treated water to the collecting pipe 50 And a water guide (40).

More specifically, the separation membrane support frame 2 has vertical frames 7 at four corners and welds the vertical frames 7 to the upper frame 8a and the lower frame 8b, A plurality of upper guide rails 4 and lower guide rails 6, which are vertically opposed to each other in a predetermined length and form a pair of left and right, are provided in the separating film support frame 2 at regular intervals in the upper and lower frames 8a, 8b, It is configured to be listed as a dog.

The left and right pair of upper and lower guide rails 4 and 6 are assembled by bolts to the upper frame 8a and the lower frame 8b respectively so as to facilitate replacement at the time of breakage, Since the separator module 10 is constructed such that the operator easily removes the separator module 10 through the rails 4 and 6 by a sliding method, workability is improved as compared with conventionally fixing the separator module to the support frame by screwing, (10) are arranged vertically in parallel to the distance between a pair of right and left rails when mounted on a plurality of upper and lower guide rails (4, 6), so that the separator module (10) Thereby improving the degree of integration during filtration.

A partition wall 9 is formed at the center of the separation membrane support frame 2 so that upper and lower guide rails 4 and 6 are symmetrically installed on both sides of the partition wall 9 to provide separation membrane modules 10, (2) to increase the separation membrane area to be injected per unit projection area, thereby improving the water treatment capacity according to the degree of integration of the separation membrane module (10).

On the other hand, the membrane modules 10 are vertically arranged on the upper and lower guide rails 4 and 6 in the membrane support frame 2, and one side of the membrane support frame 2 is connected to an air pump The air supply pipe 24 is connected to the air distribution pipe 20 to which a plurality of air diffusers 22 are connected at a lower portion of the separation membrane support frame 2 so as to supply air.

The air distribution pipe 20 is fixed to the lower frame 8b at the lower center of the separation membrane support frame 2. A plurality of air pipes 22 are arranged at regular intervals from one side to the other side Air is supplied to each air diffusing pipe 22 through the air distribution pipe 20 and a spray unit 30 is provided directly above the air diffusing hole 22a formed in the air diffuser 22, 22 are uniformly injected into the membrane module 10 through the injection unit 30. [

The air supplied through the air distribution pipe 20 is distributed to the air diffuser 22 and the spray unit 30 located directly above the air diffuser 22 is supplied to the separation membrane module 10 And functions to remove contaminants sticking to the surface during filtration operation by suction of the hollow fiber membrane 12.

In other words, the spray units 30 installed on the upper ends of the diffuser units 22 are arranged in a rectangular bar shape in the left-right direction on the lower frame 8b so as to be fixed as bolts so as to spray air on the separation membrane module 10, A plurality of inflow holes 32 corresponding to the plurality of injection holes 22a formed in the air diffuser 22 and an outflow portion 34 communicating with the upper side of each of the inflow holes 32 are protruded So that the outlet 34 is positioned below the space between the membrane membranes 10.

A guide plate 38 is formed in the injection unit 30 between the lower inflow hole 32 and the upper outflow portion 34 so that the inflow air flows through the inflow hole 32, The outflow portion 34 protruding from the upper portion of the injection unit 30 is located at the lower part between the separation membrane modules 10 and is discharged to the outside through the vortex jetting Air is uniformly transferred to the entire hollow fiber membrane 12, so that contaminants adhering to the surface can be easily removed, thereby minimizing the sludge phenomenon of the membrane module 10.

The separation membrane module 10 mounted in the separation membrane support frame 2 and collecting the filtered treatment water under suction is formed by forming the upper head 14 and the lower head 16 in the form of a square bar, The hollow fiber membranes 12 are fixedly installed between the upper and lower heads 14 and 16 and the collecting spaces 14a and 16a are formed in the upper and lower heads 14 and 16, 14 and 16 so that the upper and lower heads 14 and 16 collect at the same time during filtration by the suction action of the hollow fiber membrane 12 to increase the capacity of the treated water Zoom improves water treatment ability.

The connection portions 14b and 16b are formed to protrude from one side of the upper head 14 and the lower head 16 constituting the separation membrane module 10 so as to be coupled to the process water guide 40, The treated water introduced into the water collecting spaces 14a and 16a of the water jackets 14 and 16 is discharged quickly so that the treated water guide 40 can be discharged quickly so as not to overload the hollow fiber membranes 12 during suction filtration Increase the shear force.

The separation membrane modules 10 constituted by the unit members are vertically installed on the upper frame 14 and the upper and lower guide rails 4 and 6 provided on the lower frame 16 and are slidably coupled to each other. (16c) are formed on both sides of the upper head (14) and the lower head (16).

By merely pushing the separation membrane module 10 through the upper and lower guide rails 4 and 6 through the coupling grooves 14c and 16c formed in the lower heads 14 and 16, The separation membrane module 10 can be easily attached to and detached from the separation membrane support frame 2 because the installation of the separation membrane module 10 in the separation membrane support frame 2 is performed quickly, It is possible to easily carry out the replacement work after the washing and the reinstallation after the washing.

The process water guide 40 is connected to one side of the separation membrane module 10 to discharge the collected water while supporting the upper and lower heads 14 and 16, And the upper connector 46 connected to the connection pipe 44 at the upper portion of the lower connector 42 to communicate with the connection portion 14a of the upper head 14, And a water collecting connector 48 communicating with the connecting portion 52 formed in the collector pipe 50 at an upper portion of the connector 46.

The water guide 40 guides the upper and lower heads 14 and 16 of the separator module 10 through the upper and lower connectors 48 and 46, The upper and lower heads 14 and 16 are vertically spaced apart from each other so that the hollow fiber membranes 12 are supported by the upper and lower heads 14 and 16 through the upper connector 46 and the lower connector 42, And the water is sent to the collecting pipe 50 connected to the water collecting connector 48, so that the water treatment of the separating membrane module 10 can be performed smoothly.

The water collecting pipe 40 is coupled to the plurality of separator modules 10 and connected to the plurality of connecting portions 52 formed on the side of the collecting pipe 50, The treated water filtered in each of the separation membrane modules 10 is sucked and discharged at a time, so that the collection efficiency is improved and the discharged water is quickly discharged.

The water collecting pipe 50 is installed on the upper part of the separation membrane support frame 2 and has a closed end shape and is connected to the water collecting pipe 50 through the water collecting pipe 50, A plurality of connection portions 52 are arranged at regular intervals on both sides of the collector pipe 50 and are connected to the separation membrane modules 10 on both sides in a lined manner, A process water discharge pipe 54 connected to the pump is installed to suck the filtered process water into the separation membrane module 10 through the process water guide 40 provided on both sides of the collecting pipe 50, Thereby increasing the water treatment capacity.

After the separation membrane modules 10 are mounted in the separation membrane support frame 2, a partition 60 is installed on the front surface of the separation membrane module 10 and the injection unit 30, which is mounted on the lower part of the separation membrane module 10, So that the sludge phenomenon of the separation membrane module 10 can be minimized by accelerating the desorption action of the contaminants at the time of suction filtration of the hollow fiber membrane 12 by blocking the expansion air flow of the air injected through the hollow fiber membrane 12 .

Although the present invention has been described with respect to specific embodiments, various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited by the described embodiments but should be determined by the equivalents of the claims and the claims.

(A) - Membrane filtration device (2) - Membrane support frame
(4) - upper guide rail (6) - lower guide rail
(7) - vertical frame (8a) - upper frame
(8b) - a lower frame (9) - a partition
(10) - Membrane module (12) - Hollow fiber membrane
(14) - upper head (16) - lower head
(14a) (16a) - collecting space (14b) (16b) - connecting portion
(14c) (16c) - fastening groove (20) - air distribution pipe
(22) - diffuser (22a) - sparger
(24) -Air supply pipe (30) -Injection unit
(32) - inlet hole (34) - outlet
(36) - guide plate (40) - treated water guide
(42) -lower connector (44) -connecting piping
(46) - upper connector (48) - collecting connector
(50) - collecting pipe (52) - connecting part
(54) - treated water discharge pipe (60) - partition

Claims (9)

1. A membrane filtration apparatus for dipping in a biological reaction tank of a sewage treatment plant for filtration treatment,
An air supply pipe 24 connected to the air pump is connected to an air distribution pipe 20 having a plurality of air diffusers 22 connected to the lower part of the separation membrane support frame 2 to supply air,
An injection unit 30 for injecting air is provided on each of the air diffusing pipes 22 and an outlet 34 protruding from the injection unit 30 is disposed at a lower portion between the separation membrane modules 10, 12 are desorbed,
The separator module 10 includes a plurality of upper and lower guide rails 4a and 4b which face each other on the upper and lower frames 8a and 8b constituting the separation membrane support frame 2 as a unit member, (6) is slidably attached and detached,
A process water guide 40 for supporting the upper head 14 and the lower head 16 to communicate with each other is connected to one side of the separation membrane module 10 so that the treated water filtered through the hollow fiber membrane 12 can pass through the upper and lower heads 14, The treatment water guide 40 is sucked and discharged in the water collection unit 14 (16)
The treatment water guide 40 is connected to a collection pipe 50 connected to a suction pump at an upper portion of the separation membrane support frame 2 and provided with a treatment water discharge pipe 54 for discharging treated water to the outside, The partition walls 9 are formed in the center of the support frame 2 so that the upper and lower guide rails 4 and 6 are provided on both sides of the partition wall 9 so that the separation membrane modules 10 are attached to the separation membrane support frame 2 Wherein the MBR separator is installed in two rows.
The method according to claim 1,
The air distribution pipe 20 connected to the air supply pipe 24 is fixed to the lower center of the separation membrane support frame 2 and a plurality of air pipes 22 are arranged at regular intervals on both sides of the air distribution pipe 20 And the jetting unit (30) is positioned directly above each diffuser (22).
The method according to claim 1,
The injection unit 30 has a rectangular bar shape and a plurality of inflow holes 32 are formed in the lower part at regular intervals in the lower part. The inflow hole 32 is formed at the upper part of the inflow hole 32, And a guide plate (36) is vertically and zigzagged between the upper and lower guide grooves (34) so that air is sprayed under vortex flow.
The method according to claim 1,
The separator module 10 has a structure in which the upper head 14 and the lower head 16 are formed in the shape of a square bar and collecting spaces 14a and 16a are formed in the upper and lower heads 14 and 16 to form the hollow fiber membrane 12 (14b) and (16b) are formed on one side of the upper and lower heads (14) and (16) so as to be connected to the treatment water guide (40) The filtration device of the MBR separation membrane for the cassette type.
The method according to claim 1,
The upper and lower frames 8a and 8b of the separation membrane support frame 2 are formed with locking grooves 14c and 16c in the longitudinal direction on both sides of the upper head 14 and the lower head 16 of the membrane module 10, 8b, the separator module 10 is slidably coupled to the upper and lower guide rails 4, 6, which are a pair of left and right, respectively.
The method according to claim 1,
The process water guide 40 connects the upper connector 46 communicating with the upper head 14 of the separation membrane module 10 and the lower connector 42 communicating with the lower head 16 with the connection pipe 44 And the water collecting connector (48) is coupled to the upper portion of the upper connector (46) and connected to the connecting portion (52) projecting to the collecting pipe (50).
The method according to claim 1,
The collector pipe 50 provided at the upper part of the separation membrane support frame 2 is formed with a plurality of connection portions 52 at opposite side bars facing each other with the end portion thereof being in the form of a closed type so that the separation membrane modules 10 (40) are connected to each other in parallel so that the treated water filtered in the separation membrane modules (10) is discharged to the outside through one collecting water pipe (50) Filtration device of MBR membrane.
The method according to claim 1,
A partition (60) is provided on a front surface of a separation membrane module (10) provided in a separation membrane support frame (2) so that air injected from the injection unit (30) Filtration device of MBR membrane.
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