JPH0796148A - Separation membrane device - Google Patents

Abstract

(57) [Summary] [Purpose] A flat membrane stacking type capable of separating and removing turbid components in liquids and arbitrary low-boiling components at the same time, and improving efficiency of processing and downsizing of equipment. A separation membrane device of the above is provided. [Structure] An upstream module structure (A1) having a flat plate separation membrane for pervaporation or membrane distillation, and a downstream module structure (A2) having a flat plate separation membrane for microfiltration or ultrafiltration. And each module structure (A1),
A continuous supply flow path (28A) across (A2), a supply port (7) for the liquid to be treated, a discharge port (8) for the non-permeate, and a depressurizable degassing pipe (for collecting volatile components). 12) and a collection pipe (14) for collecting the liquid component.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separation membrane device, and more particularly to a separation membrane device used for, for example, water purification treatment, in which turbid components and volatile components contained in treated water are contained. The present invention relates to a novel separation membrane device capable of simultaneously separating and removing, and improving efficiency of processing and downsizing of equipment.

[0002]

2. Description of the Related Art Conventionally, various separation membranes using various materials have been studied, and turbidity components contained in raw water in, for example, water purification treatment are highly refined by separation operations such as microfiltration and ultrafiltration. Various techniques for removing have been proposed.

[0003]

By the way, when purifying river water, lake water, etc., in addition to suspended matter components such as sludge and microorganisms, for example, trichlorethylene, tetrachloroethylene,
If volatile components such as trihalomethane or ammonia are contained, other purification methods must be used in addition to the above separation operation.In that case, a device for removing volatile components must be operated separately. Therefore, there is a problem that the entire facility becomes large. In particular, in water purification treatment, it is necessary to treat a large amount of water continuously and at low cost, and it is an important subject to improve the efficiency of treatment and downsize equipment.

In view of the above situation, the present invention has been made as a result of various studies with the aim of efficiently separating turbidity components and volatile components contained in water using a separation membrane. An object thereof is to provide a novel separation membrane device capable of separating and removing a turbid component and an arbitrary volatile component in a liquid at the same time, which can improve efficiency of treatment and downsizing of equipment. Is.

[0005]

In order to solve the above problems, the separation membrane device of the present invention is a separation membrane device for separating and removing turbid components and arbitrary volatile components contained in a liquid. , An upstream module structure in which a plurality of channels parallel to the membrane surface were formed by a separation membrane element provided with a separation membrane for pervaporation or membrane distillation, and a separation membrane for microfiltration or ultrafiltration were provided. A downstream module structure in which a plurality of channels parallel to the membrane surface were formed by a separation membrane element, and was continuous over both module structures and was connected to each channel in each of these module structures. A supply channel, a supply port for the liquid to be treated provided at the upstream end of the supply channel, a non-permeate discharge port provided at the downstream end of the supply channel, and Module configuration on the upstream side A degassing pipe connected to the separation membrane element to collect the volatile components that have passed through the separation membrane element, and a liquid component that has been connected to the separation membrane element of the downstream module structure and passed through the separation membrane element. It is characterized in that it is composed of a collection pipe for collecting.

[0006]

The module structure on the upstream side selectively permeates volatile components in the liquid by means of a separation membrane for pervaporation or membrane distillation, and supplies the liquid containing no volatile components to the downstream side by means of a supply flow path. Supply to the module structure. Further, the downstream module structure allows only the liquid to pass through by the separation membrane for microfiltration or ultrafiltration, and collects the liquid containing no turbid component by the collection tube.

[0007]

Embodiments of the separation membrane device of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an external view showing an embodiment of the present invention, and FIG. 2 is a view showing an internal structure of a module structure II-
II arrow view, FIG. 3 is a III-III arrow view showing a separation membrane element, FIG. 4 is a development view showing another embodiment of the present invention, and FIG. 5 shows a filtration unit of another embodiment of the present invention. Partially broken view,
FIG. 6 is a VI-VI arrow view showing the separation membrane element.

In the separation membrane device of the present invention, the turbid component and the optional volatile component contained in the liquid are simultaneously and continuously separated and removed, so that the turbid component is less likely to be accumulated in the module. A flat film laminated type module structure is provided, and at least two module components having different functions on the upstream side and the downstream side are arranged. These module structures can be arranged separately or integrated according to the scale of the equipment, etc., but in the following examples, in order to further reduce the size of the device structure. Shows a separation membrane device in which module structures having different functions are integrated. Further, water containing a turbid component and a volatile component will be described as an example of the liquid to be treated.

First, an embodiment of the present invention will be described. The basic structure of the separation membrane device of the present invention is, for example, JP-B-53-35.
The structure of the plate-frame type separation membrane device described in Japanese Patent No. 553 is effectively used. A stack of flat membranes forms a thin laminar flow channel on the membrane surface to pressurize the water to be treated. It is separated into a permeated liquid and a non-permeated liquid by flowing it as a flow.

That is, the separation membrane device (1) of the present invention is
As shown in FIG. 1 or 2, a stack of plate-shaped separation membrane elements (2) having a separation membrane for pervaporation or membrane distillation provided on at least one side has a plurality of channels (9) parallel to the membrane surface. The upstream module structure (A
1) and a downstream module configuration in which a plurality of flow channels (9) parallel to the membrane surface are formed by a stack of plate-shaped separation membrane elements having a separation membrane for microfiltration or ultrafiltration provided on at least one surface Mainly composed of body (A2). Then, both module constructs (A1), (A
2) continuous and each module assembly (A1),
In (A2), a supply flow path (28A) connected to each flow path (9), a supply port (7) for water to be treated provided at an upstream end of the supply flow path (28A), and a supply Channel (28
The non-permeate water outlet (8) provided at the downstream end of (A) and the separation membrane element (2) of the upstream module structure (A1) were connected to pass through the separation membrane element. A degassing pipe (12) for collecting volatile components and a collection pipe (14) connected to the separation membrane element (2) of the downstream module structure (A2) for collecting water that has passed through the separation membrane element. With.

The external structure of each element (2) is the same as that of each module structure (A1), (A2).
As shown in FIG. 2, each element (2) has, for example, a circular shape or an elliptical shape having substantially the same size, and has openings (28) and (28) at symmetrical positions at both ends. The openings (28), (28) function as insertion holes for the bolts (5), (5) used as the pressure contact means of the element stack, and the inner diameters of the bolts (5), (5).
Larger than the outer diameter of the inserted bolt (5),
The supply channel (28A) is formed around (5).

Each element (2) can be in various forms as long as it is a membrane element including a support plate for forming a structure, but as an example, as shown in FIG. 3, a spacer (23) is used. A pair of membrane supporting plates (22) symmetrically arranged in the stacking direction via a membrane and a separation membrane (25) provided on the surface of each membrane supporting plate (22) via a membrane support (24). The flat box-shaped structure can be mentioned.

The membrane support plate (22) includes a separation membrane (2
In order to allow the permeation component of 5) to smoothly pass to the spacer (23) side, the structure other than the outer peripheral wall surface is configured to have a porous structure. From the viewpoint of chemical resistance and heat resistance, plastics such as polypropylene, polyurethane, polysulfone, and Teflon, metals such as stainless steel, and ceramics are preferably used as the material of the membrane supporting plate (22).

The membrane supporting plate (22) is provided with a plurality of convex ribs (222) on its membrane supporting surface, and a protrusion () having the same height as the convex rib (222) is provided on the peripheral portion. 221) is provided. The convex rib (222) is
When the element (2) is laminated, it has a function of pressing the separation membrane (25) by its top portion, and the peripheral projection (221).
Has a function of preventing a liquid that does not pass through the separation membrane (25) from flowing out of the module from between the elements (2).

Further, the plurality of convex ribs (222) have a flow path (9) parallel to the membrane surface, that is, between adjacent elements (2) due to the concave portions formed between the convex ribs. A predetermined gap for supplying water to be treated is formed. Moreover, as shown in FIG. 1, the convex ribs (222) have openings (28), (2) on both surfaces of the element (2).
8), which is continuously formed between the above-mentioned supply channels (28).
A) (two openings (28) in the element (2),
It also serves as a guide on the surface of the element (2) to smooth the flow between (28)).

The plurality of convex ribs (222) can be formed separately from the membrane supporting plate (22), but they can also be integrally formed in order to simplify the assembly process and reduce the manufacturing cost. That is, as shown in FIG. 2, a perforated plate having openings (28), (28) at both ends, a plurality of convex ribs (222) on a membrane supporting surface, and a large number of through holes is formed by injection molding. It can be easily manufactured by The height of the convex rib (222) is not particularly limited, but is usually 0.2 to 10 mm, preferably 0.4 to 7 m.
The range is m. The number of convex ribs (222) is
Although it cannot be unconditionally determined because it depends on the area of the membrane support plate (22), the distance between adjacent convex ribs is usually determined to be 10 to 80 mm, preferably 20 to 50 mm.

The spacer (23) filled inside the membrane supporting plate (22) has a function of holding the internal space of the flat box-shaped structure when the elements (2) are stacked,
It is formed of a member that allows liquid or gas to pass therethrough. Also,
The membrane support (24) prevents the separation membrane (25) from being damaged by the membrane support plate (22), buffers the impact of the solid matter in the water to be treated on the separation membrane (25), and separates the separation membrane (2).
It is provided so that 5) does not adhere to the membrane support plate (22) and the permeation component passes smoothly inside the element, and therefore liquids or gases such as non-woven fabric and filter paper can pass through. It is preferably formed of a member. The thickness of the membrane support (24) is usually 0.1 to
The range is 2 mm.

As shown in FIG. 3, the outer periphery of the membrane supporting plate (22) and the spacer (23) are sealed on the outer periphery of the element (2) having the above-mentioned structure. An outer peripheral wall surface (26) is formed by the narrow strip. Although not shown, the opening (28) of the element,
Also in the inner circumference of (28), in order to prevent the water to be treated from entering, the inner circumference wall surface is formed by the narrow width piece of the non-porous plate. The sealing of the inner periphery of the openings (28) and (28) is performed by connecting the two membrane support plates (22) to the membrane support (24) and the separation membrane (2).
It may be integrally sealed with a suitable resin together with 5). As a result, the water to be treated supplied to the supply channel (28A) is introduced only into the channel (9) parallel to the membrane surface.

The outer peripheral wall surface (2) of the element (2)
In 6), a conduit (13) is provided for guiding the permeated component to the deaeration pipe (12) or the collection pipe (14) as a recovery means.
Are inserted toward the inside of the membrane support plate (22).
The conduits (13) are usually provided at one to two places per sheet of the element (2), but can be provided in an appropriate number according to the number of degassing pipes (12) or collecting pipes (14) installed. .

When the elements (2) are stacked as described above, the supply flow paths (28A) formed by the openings (28) and (28) of each element (2) are respectively located at spaced positions in the module. Two series are formed along the stacking direction. Then, as shown in FIG.
As in the case of the separation membrane device described in Japanese Patent No. 5553, the supply channel (28A) may be provided with a closing ring (29) as a separate closing means.

The closure ring (29) comprises a ring sized to fit in the opening (28) and contact the surface of the bolt (5). The closing ring (29) is positioned so as to form a step in the stacking direction with respect to the closing ring (29) of the other supply flow passage (28A), whereby one of the supply flow passages (28A) is formed into an element. The water to be treated that has passed in the stacking direction is deflected toward the other supply flow channel (28A) via the group of flow channels (9).

The number of the elements (2) having the above structure can be arbitrarily selected in consideration of the processing amount in the separation membrane device (1), but normally, it is appropriately selected from the range of 10 to 100 sheets. It The element (2) is arranged between the end plates (3) and (4) having a pair of openings at both ends at the same position, and the elements (2) are connected to the openings (28) and (28) through these end plates. The bolts (5), (5) inserted and the nuts (6), (6) screwed to them are pressed against each other. By such pressure contact, each of the plurality of convex ribs (222) provided on each membrane support plate (22) presses the separation membrane (25) of the stack by each top as shown in FIG.
As the pressure contact means, other means for externally tightening the end plates (3) and (4) by means of hydraulic pressure or the like can be adopted.

On the outer peripheral side of one of the bolts (5) inserted through the end plate (3), a flow path (31) communicating with the supply flow path (28A) is formed and a liquid supply pipe is connected thereto. The liquid supply pipe serves as a supply port (7) for the liquid to be treated. On the other hand, a flow passage (41) communicating with the supply flow passage (28A) is formed on the outer peripheral side of one of the bolts (5) inserted into the end plate (4), and a liquid discharge pipe is connected to the liquid. The discharge pipe serves as a discharge port (7) for the water to be treated. Then, the water to be treated supplied from the supply port (7) is introduced into the flow path (9) parallel to the membrane surface as described above, and the non-permeated water that has not passed through the separation membrane (25) is discharged from the discharge port. Emitted from (8). The supply port (7) and the discharge port (8) may be provided at one end portion and the other end portion of any one of the two supply channels (28A) and (28A) which are separated from each other. .

In the separation membrane device (1) of the present invention, as shown in FIGS. 1 and 2, the upstream module structure (A
1) and the upstream module structure (A2) are integrated, but a large number of separation membrane elements (2) for separating both volatile components and suspended components contained in the water to be treated. In the above, the separation membrane (25) for pervaporation or membrane distillation is provided in the separation membrane element (2) of the upstream module structure (A1), and the downstream module structure (A).
The separation membrane element (2) of 2) is provided with a separation membrane (25) for microfiltration or ultrafiltration, respectively.

Specifically, as the separation membrane (25) contained in the upstream module structure (A1), various conventionally known separation membranes made of polydimethylsiloxane, polytrimethylsilylpropyne or the like should be used. Can be done.
As the separation membrane (25) included in the downstream module structure (A2), various separation membranes made of polysulfone, polyvinylidene fluoride, polyacrylonitrile, cellulose acetate or the like can be used.

Further, the upstream module structure (A1)
Degassing pipe (1 as means for collecting permeated components provided in the
2), each element (2) of the module structure
A conduit (13) inserted between a pair of membrane support plates (22) at is connected. The deaeration tube (12) is
It is connected to a trap device, a vacuum pump and the like (not shown) so that the pressure can be reduced. By driving the vacuum pump, the volatile components separated from the water to be treated by the separation membrane (25) are degassed. Through (12), it is collected in a trap device filled with an adsorbent such as activated carbon.

On the other hand, the downstream module structure (A2)
A collection tube (1 as a means for collecting permeated components provided in the
4) In the conduit (13) of each downstream element (2)
Are connected. In the collection pipe (14), clean water containing no solid content separated from the water to be treated by the separation membrane (25) is collected. The deaeration pipe (12) and the collection pipe (14) are usually arranged one to two each.

The openings (28), the seal ring provided on the inner wall surface of the opening (28), and the supply channel (28A).
From the viewpoint of chemical resistance and heat resistance, polypropylene, polyurethane, polysulfone, Teflon, and fluorine are used as materials for the closing ring (29), the conduit (13), the degassing pipe (12), and the collecting pipe (14) provided in Plastic such as rubber, metal such as stainless steel, or ceramics is preferably used.

In the separation membrane device (1) of the present invention configured as described above, when purifying water containing volatile components and suspended components, the water to be treated is provided on the end plate (3). It is supplied to one supply channel (28A) through the supply port (7). The supply flow channel (28A) is connected to the flow channel (9) between the separation membrane elements (3), and both supply flow channels (28A) have stepped portions in the element stacking direction. Each is provided with a closure ring (29) positioned so that Therefore, the water to be treated is sequentially supplied from each upstream flow path (9) while being deflected from one to the other supply flow path (28A) and from the other to the one supply flow path (28A). .

In the separation membrane device (1) of the present invention, in each separation membrane element (2), the upstream module structure (A
The separation membrane element (2) included in 1) is provided with a separation membrane (25) for pervaporation or membrane distillation, and by such a separation membrane (25), trichlorethylene, tetrachloroethylene, trihalomethane or Volatile components such as ammonia can be selectively permeated into the separation membrane element (2) as vapor. The vapor of the volatile component that has flowed into the separation membrane element (2) is sucked and recovered by the degassing pipe (12) through the conduit (13) inserted into each separation membrane element (2).

Then, the water to be treated from which the volatile components have been removed is introduced into the module structure (A2) on the downstream side through the supply flow path (28A). The separation membrane element (2) included in the downstream module structure (A2) is provided with a separation membrane (25) for microfiltration or ultrafiltration, and the separation membrane (25) is Water containing no turbid component in the treated water is selectively permeated into the separation membrane element (2). Therefore, the water that has flowed into the separation membrane element (2) has the volatile components and suspended components removed, and the collection pipe (14) is passed through the conduit (13) inserted into each separation membrane element (2). ) Can be collected as clean water. Also, the water with concentrated turbidity components should be removed from the end plate (4).
It is discharged to the outside of the module through a discharge port (8) provided in the. In that case, since the discharged water containing the turbid component does not contain an organic solvent, it can be easily treated.

As described above, the separation membrane device (1) of the present invention
Is because a separation membrane for pervaporation or membrane distillation is arranged on the upstream side, and a separation membrane for microfiltration or ultrafiltration is arranged on the downstream side to supply the non-permeation component on the upstream side to the downstream side. It is possible to use a common supply flow path for the water to be treated and structurally integrate them. Then, by simply supplying the water to be treated to the common supply channel (28A), pervaporation separation, microfiltration and the like can be performed together, and the water to be treated containing the volatile component and the turbid component is These components can be separated and removed at the same time. Therefore, in the separation membrane device (1) of the present invention, it is possible to improve the efficiency of the treatment, downsize the equipment for constructing the filtration device and the like, and reduce the treatment cost.

In the above embodiment, the membrane supporting plate (22) of the separation membrane element (2) is formed by randomly placing the membrane supporting plate (22) itself inside a foamed resin such as hard urethane foam or a porous ceramic. And a conduit (13) is arranged on the outer peripheral wall surface of the porous material on which a continuous porous structure is formed, and the outer peripheral wall surface and the opening (2
It can also be constructed by sealing the inner peripheral wall surfaces of 8) and (28) with a suitable resin coating. Further, as the separation membrane element (2), of course, as described in JP-B-53-35553, it is possible to use various conventionally known flat membrane elements provided with a membrane supporting member.

Next, another embodiment of the present invention will be described. As shown in FIG. 4, the separation membrane device (1B) according to another embodiment of the present invention has a basic structure, for example, as described in Japanese Patent Publication No. 3-504459.
It is similar to the structure of the filtration device described in the publication. Specifically, as shown in FIG. 5 or 6, a flat plate-shaped separation membrane element (2b) having a separation membrane (25b) on at least one surface.
Is a cassette frame type separation membrane device in which a plurality of filtration units (20b) each having a plurality of flow paths (9b) parallel to the membrane surface are arranged in the element stacking direction.

As shown in FIG. 5, the filtration unit (20b) has a box-shaped container (10) whose parallel side surfaces are open.
b) contains a large number of separation membrane elements (2b).
The above-mentioned flow path (9b) is formed by interposing an appropriate spacer (21b) as described in JP-A-504459. And, in the upper part of the container (10b), there is formed a collection chamber (10c) of the permeated component which is partitioned from the accommodation space of the separation membrane element (2b) by an appropriate resin plate or resin sealing material, At the top of the collection chamber,
A hole (13) for supplying the permeation component to the recovery means described later.
c) is provided.

In each filtration unit (20b), as shown in FIG. 4, for example, a separation membrane element (2b) is provided with respect to a cassette frame (1F) to (5F) in the shape of a short axis square tube having open both ends. Are housed in such a manner that the stacking direction is aligned with the axis of each cassette frame, and each of them forms a module structure. Also, cassette frame (1F)
Within (5F) to (5F), space portions that form the supply flow path (28B) are provided on both sides of the parallel open edges of each separation membrane element (2b). That is, the supply channel (28
B) is formed continuously from the cassette frame (1F) to the cassette frame (5F) when the cassette frames (1F) to (5F) are connected, and each flow path () in each filtration unit (20b). 9b) and has a function of sequentially supplying water to be treated to these flow paths (9b).

Further, each cassette frame (1F) to (5
The top of F) is provided with a conduit (13b) connected to the hole (13c) of the contained filtration unit (20b), and the conduit (13b) is provided in each separation membrane element (2). It has a function of supplying the permeated components that have passed to the deaeration pipes (12b) and (14b) as a recovery means.
And each cassette frame (1F)-(5F) which accommodated the filtration unit (20b) is a partition plate (29b),
(29b) are arranged in the stacking direction of the separation membrane elements (2b), and both ends thereof are end plates (3b), (4).
It is sealed by b). The filtration unit (20b) is
As shown in FIG. 4, for example, five units are provided, each filtering unit (20b) and a partition plate (29b) or end plates (3b), (4
The seal member is interposed between the socket (5) and the socket (5
b), (6b), etc. are connected in an airtight manner by an appropriate pressure contact means.

Further, each partition plate (29b) is provided with an opening (29c) at a position corresponding to the space of one of the filtration units constituting the supply channel (28B). Moreover, the arrangement of the openings (29c) is sequentially reversed for each partition plate (29c). As a result, the water to be treated supplied to one of the supply channels (28B) is surely passed through each of the filtration units (20b) while its flow is deflected to the other supply channel (28B).

Further, at one end of the supply channel (28B), that is, at one end of the cassette frame (1F), there is provided a conduit communicating with the space of the cassette frame. The passage serves as a supply port (7b) for the water to be treated. The other end of the supply flow path (28B), that is, the cassette frame (5F) located at the other end is provided with a conduit communicating with the space of the cassette frame. It is used as an outlet (8b) of non-permeated water.

In the separation membrane device (1B) of the present invention, as shown in FIG. 4, for example, each of the filtration units (in two cassette frames (1F) and (2F) forming the upstream module structure (B1) ( The separation membrane element (2b) of 20b) includes a separation membrane (25) for pervaporation or membrane distillation.
b) is provided, and the downstream module structure (B
3 cassette frames (3F) to (5F) which form 2)
In the separation membrane element (2b) of each filtration unit (20b) in the above, a separation membrane (2) for microfiltration or ultrafiltration is provided.
5b) is provided. Each of the above separation membranes (25b) is made of the same material as that of the embodiment shown in FIG.

By the way, the separation membrane device (1B) of this embodiment
Does not constitute the module structure by the separation membrane element as in the embodiment shown in FIG. 1, but constructs the structure by the filtration unit (20b) and the cassette frames (1F) to (5F) for accommodating the filtration unit (20b). Constitute. Therefore, the separation membrane element (2b) used in this example
Can be used in various forms as long as it is a flat sheet membrane element having a generally used structure capable of taking out a permeation component.

As an example, although not shown, the separation membrane element (2b) is a permeation membrane or a membrane for membrane distillation, and the permeation is made of woven or non-woven fabric such as polyethylene terephthalate or polypropylene at the center. A support layer such as polysulfone is provided on both surfaces of the layer, and a thin film layer of a silicon-based polymer is formed on the surface of the support layer. In the case of a microfiltration membrane or an ultrafiltration membrane, Table 3-50
As described in Japanese Patent No. 4459, a web-shaped spacer is interposed between a pair of thin films formed of polyacrylonitrile, cellulose acetate, or the like. In such a separation membrane element (2b), the total thickness including the separation membrane (25b) is usually set to about 0.5 to 10 mm, and the flow path (formed between the separation membrane elements (2b) ( The gap 9b) is about 0.4 to 10 mm. And
The separation membrane element (2b) comprises one filtration unit (2
0b), usually about 10 to 200 sheets are stored.

Further, the deaeration pipe (12b) is provided in each of the collection chambers through the conduits (13b) of the cassette frames (1F) and (2F) and the holes (13c) of each upstream filtration unit (20b). It is connected to (10c). The collection pipe (14b) is a conduit (13b) of the cassette frame (3F) to (5F) and each downstream filtration unit (20b).
It is connected to each collection chamber (10c) through the hole (13c). The deaeration pipe (12b) is connected to a trap device, a vacuum pump and the like (not shown) as in the embodiment shown in FIG. 1, and the volatile components separated from the water to be treated are activated carbon and the like. It is collected in a trap device filled with an adsorbent. The collection tube (14b) is connected to the separation membrane (25
The solid-free water separated from the water to be treated in b) is recovered.

The cassette frames (1F) to (5
F), the partition plate (29b), the container (10b) of the filtration unit (20b), the degassing pipe (12b), the collecting pipe (14b), etc. are made of polypropylene, similar to the embodiment shown in FIG. Polyurethane, polysulfone, Teflon, plastic such as fluororubber, metal such as stainless steel, or ceramics is preferably used.

Also in the embodiment shown in FIG.
Similarly to the embodiment shown in FIG.
Since it is possible to perform pervaporation separation, microfiltration, etc. in common, it is possible to improve the efficiency of processing and downsize equipment, and it is possible to reduce processing costs. Moreover, in the separation membrane device (1B) shown in the present embodiment, the filtration unit (20b) can be easily replaced as one unit, which is particularly suitable for continuous operation for a long period of time.

In the embodiment shown in FIG. 4, the filtration unit (20) is passed through the supply passages (28B) formed in the cassette frames (1F) to (5F).
Although the liquid to be treated was sequentially deflected from the upstream side with respect to b), the separation membrane device of the present invention, although not shown, has the filtration unit (20b) shown in FIG. It is also possible to arrange the elements (2b) in a multi-stage so that both elements (2b) are located on the same plane between the downstream side and the downstream side so that the liquid to be treated flows linearly.

That is, the filtration unit (20b) of each of the upstream module structure and the downstream module structure.
Are arranged such that the open sides of the containers (10b) face each other, and the element (2
A plurality of filtration units (20b) in the stacking direction of b)
Are arranged in parallel. Such upstream and downstream module components are integrally housed in, for example, a large rectangular parallelepiped casing whose parallel side surfaces are open, and the casing forms a linear supply passage. The open side surface of the casing on the upstream side serves as a supply port, and the open side surface on the downstream side serves as a discharge port.

Further, in the above embodiment, since it is applied to large-scale water treatment, the water to be treated is usually introduced into the supply flow channel without being particularly pressurized. Therefore, a decompression device is also attached to the collection tube connected to the separation membrane element (2b) of the downstream module structure, and the liquid component that has passed through the separation membrane element is collected. As described above, the supply flow path is linearly provided, and the plurality of filtration units (20
When b) is arranged in parallel, the water to be treated is simultaneously supplied to the respective filtration units (20b) arranged in parallel, so that the primary treatment such as the primary treatment of the water purification plant is much larger than that of the embodiment shown in FIG. Suitable for capacity processing.

In the separation membrane device of the present invention, as the module components, in addition to the flat membrane laminated type shown in each of the above-mentioned examples, various types such as hollow fiber type and tube type are used. You can do it. Further, the upstream module structure and the downstream module structure may be the same type, respectively, it is also possible to appropriately combine different types according to the components to be removed and the content in the liquid. is there.

The separation membrane device of the present invention simultaneously separates and removes turbid components and arbitrary volatile components contained in the liquid. For example, trihalomethane in water purification treatment,
Removal of suspended matter, including removal of off-flavor components such as ammonia,
Foods, removal of organic solvents such as trichloroethylene, tetrachloroethylene, etc. in the production of water for use in fermentation from groundwater, biotechnology, microbial fermentation inhibitors including microbial fermentation inhibitors including removal of volatile fermentation inhibitors in the fermentation industry In addition to adjustment of bacterial cell concentration, including removal of activated carbon, removal of activated sludge containing ammonia etc. in ultrafiltration treatment of building tap water,
It can be used for various liquid separations such as human waste treatment including removal of ammonia and cleaning treatment of various industrial wastewater containing volatile components.

[0051]

As described above, in the separation membrane device of the present invention, permeation vaporization separation, microfiltration and the like are performed in common with the supply flow path of the liquid to be treated, and the turbidity component in the liquid Since the volatile component can be separated and removed at the same time, the efficiency of the treatment and the downsizing of the equipment can be achieved, and the treatment cost can be reduced.

[Brief description of drawings]

FIG. 1 is an external view showing an embodiment of the present invention.

FIG. 2 is a II-II arrow view showing the internal structure of the separation membrane device structure.

FIG. 3 is a III-III arrow view showing a separation membrane element.

FIG. 4 is a development view showing another embodiment of the present invention.

FIG. 5 is a partially cutaway view showing a filtration unit according to another embodiment of the present invention.

FIG. 6 is a VI-VI arrow view showing a separation membrane element.

[Explanation of sign]

 1, 1B: Separation Membrane Device A1, A2: Module Structure B1, B2: Module Structure 2, 2b: Separation Membrane Element 7, 7b: Supply Port 8, 8b: Discharge Port 9, 9b: Flow Path 12, 12b: Deaeration tube 14, 14b: Collection tube 25, 25b: Separation membrane

Claims (1)

[Claims] 1. A separation membrane device for separating and removing turbid components and arbitrary volatile components contained in a liquid, which is parallel to the membrane surface by a separation membrane element provided with a separation membrane for pervaporation or membrane distillation. Module structure on the upstream side where multiple channels are formed and a module structure on the downstream side where multiple channels are formed parallel to the membrane surface by a separation membrane element provided with a separation membrane for microfiltration or ultrafiltration Body, a supply channel that is continuous over both of the module structures and that is connected to the channels in each of these module structures, and an object to be processed provided at an upstream end of the supply channel. A liquid supply port, a non-permeate liquid discharge port provided at an end portion on the downstream side of the supply flow path, and a separation membrane element of the upstream-side module structure are connected and passed through the separation membrane element. Volatile components A separation membrane comprising a degassing pipe for collecting the liquid and a collection pipe connected to the separation membrane element of the module structure on the downstream side for collecting the liquid component passing through the separation membrane element. apparatus.