JPH057741A - Membrane separation module - Google Patents

Abstract

PURPOSE:To simplify assembling work and to simply replace a separation membrane when the separation membrane is damaged by building a flow passage forming spacer 12 in a vessel and arranging a flat hose like separation membrane 3 bent in a meandering state in the vessel to open both end openings of the hose like separation membrane to the outside of the vessel. CONSTITUTION:A flow passage forming spacer 12 is built in a vessel 2 and a flat hose like separation membrane 3 bent in a meandering state is arranged in the vessel 2 to open both end openings of the separation membrane 3 to the outside of the vessel 2. As a result, assembling work becomes simple and the replacement of the separation membrane can be simply performed. Even when the seal between both end openings of the hose like separation membrane and other member is insufficient, this state can be simply repaired. Further, since only a small number of small packings may be used, cost is decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a membrane separation module used for various membrane separations such as pervaporation method, reverse osmosis method, ultrafiltration method, microfiltration method, gas separation method and vapor permeation method.

[0002]

2. Description of the Related Art Recently, as a method for separating an organic liquid mixture, a pervaporation method, which is effective in terms of energy saving, has been attracting attention in place of the distillation method. In the pervaporation method, the raw material liquid is supplied to the primary side and the secondary side is depressurized to a vacuum state to cause selective separation.

Conventionally, the module shown in FIGS. 4 and 5 has been used as the seed membrane separation module.

In the membrane separation module (30) shown in FIG. 4, a plurality of sheet-shaped separation membranes (31) are arranged in a laminated manner with a frame-like packing (32), and thus the primary side (raw material side) )aisle
(33) and the secondary (permeation side) passages (34) are alternately formed via the separation membrane (31). The packing (32) of the primary side passage (33) is formed with a raw material liquid inlet (32a) and the same outlet (not shown). A permeate outlet (32b) is formed in the packing (32) of the secondary passage (34). A pair of upper and lower membrane supporting porous plates (35) and spacers (36) are arranged in the secondary passage (34). A portion of the peripheral edge of the porous plate (35) where no hole is formed is interposed between the separation membrane (31) and the packing (32).

In the membrane separation module (40) shown in FIG. 5, one end of a flat hose-shaped separation membrane (41) having a flow path forming member (not shown) built therein is provided on the peripheral wall of the permeate collection pipe (42). It is inserted into the formed long hole (42a) and the surrounding part is the long hole (42a)
The permeate collection tube (4
It was wrapped around 2) and placed in a vessel (44).

The permeate collecting pipe (42) has one end opened and the other end closed, and one end opening is the permeate outlet.
(42b). Raw material supply pipe for vessel (44)
(45) and the discharge pipe (46) are connected.

[0007]

However, when the membrane separation module (30) shown in FIG. 4 is manufactured,
While rewinding the long separation membrane from the wound product, cut it to a predetermined size to form a sheet-shaped separation membrane (31), which is then packed.
(32), the support plate (35) and the spacer (36) have to be assembled together, which is a troublesome work.
Moreover, the replacement work is difficult if any of the sheet-shaped separation membranes (31) is damaged. In addition, a large number of large packings (32) are required, which increases the cost.

In the membrane separation module (40) shown in FIG. 5,
If the connection between the hose separation membrane (41) and the permeate collection tube (42) is found to be inadequate and needs to be corrected, the wound separation membrane (41) and spacer (43) must be taken out from the vessel (44) and then rewound, which is a very troublesome work.

An object of the present invention is to provide a membrane separation module that solves the above problems.

[0010]

Means for Solving the Problems A membrane separation module according to the present invention comprises a vessel and a hose-shaped separation membrane disposed inside the vessel and having a flow path forming member built therein. The opening is open to the outside of the vessel.

[0011]

The operation is simplified because the hose-shaped separation membrane containing the flow path forming member is arranged in the vessel and both ends of the hose-shaped separation membrane are projected to the outside of the vessel. Moreover, if the hose-shaped separation membrane is damaged, it can be easily replaced. Further, when closing the opening of the hose-shaped separation membrane or connecting another tube, if it is found that the sealing of these portions is insufficient, this can be easily corrected. Further, the packing used for such a seal portion is small and the number thereof is small.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the membrane separation module of the present invention is applied to the pervaporation method will be described below with reference to the drawings. In the following description, the same parts and the same parts will be denoted by the same reference symbols throughout the drawings, and the description thereof will be omitted. In the following description, the upper and lower sides and the left and right sides in FIGS. 1 and 3 are referred to as the upper and lower sides and the left and right sides, respectively.

FIG. 1 shows the overall structure of the membrane separation module. In FIG. 1, the membrane separation module (1) includes a rectangular parallelepiped vessel (2) and a flat hose-shaped separation membrane (3) arranged in the vessel (2) and bent in a meandering shape. The part outside the separation membrane (3) in the vessel (2) is the primary passage (4), and the inside of the separation membrane (3) is the secondary passage.
It is said to be (5).

The raw material liquid inlet (6) is provided on the upper wall of the vessel (2),
The same outlets (7) are formed on the lower wall, the raw material liquid supply pipe (not shown) is the raw material liquid inlet (6), and the discharge pipe is the outlet.
Each is connected to (7). In the vessel (2)
A baffle plate (8) is provided so that the raw material liquid supplied from the raw material liquid inlet (6) into the vessel (2) flows in a meandering manner and is discharged from the raw material liquid outlet (7). Also, the vessel (2)
At the upper and lower ends of the right side wall of the
Cylindrical take-out ports (9) and (10) for taking out the end of (3) to the outside are formed. Flange (9a) (10a) is provided at each of the outlets (9) (10). The vessel (2) should preferably have a pressure resistant structure.

A flow path forming spacer (12) (flow path forming member) is placed inside the flat hose-shaped separation membrane (3) over the entire length. In addition, meandering spacers (13) are arranged along both sides of the hose-shaped separation membrane (3) for holding the flow path of the primary side passageway (4) and preventing the separation membrane (3) from rupturing. ..
Both ends of the hose-shaped separation membrane (3) are exposed to the outside of the vessel (2) through the outlets (9) and (10) and are expanded outward, and these expanded portions (3a) and (3b) are flanged. Followed by (9a) (10a). The closing plate (14) is fixed to the flange (9a) of the upper outlet (9), and the packing (15) is interposed between the closing plate (14) and the expanded portion (3a) of the separation membrane (3). It has been confused. Lower outlet
The flange (16a) provided at the end of the permeate collection pipe (16) is fixed to the flange (10a) of (10), and the flange (16a) and the expanded portion (3b) of the permeate collection pipe (16) are fixed. A packing (17) is interposed between and.

FIG. 2 shows a flow path forming spacer (12) built-in.
A method of manufacturing the flat hose-shaped separation membrane (3) and the spacer (13) that are bent in a meandering shape will be described. First, wrap the flow path forming spacer (12) with a long sheet-shaped separation membrane and chemically or physically join the joints to form a flat hose-shaped separation membrane (3) containing the spacer (12). .. Next, spacers (13) made of mesh are arranged on both sides of the hose-shaped separation membrane (3), and then these are integrally bent in a meandering shape.

In such a constitution, the raw material liquid consisting of the organic liquid mixture is put into the vessel (2) through the raw material liquid inlet (6) and flows in a meandering manner in the primary side passageway (4) therein. It is discharged from the outlet (7). At this time, the hose-shaped separation membrane
(3) When the inside pressure is reduced to a vacuum state, vapor permeates the peripheral wall portion of the separation membrane (3), whereby the mixture is separated.

FIG. 3 shows another embodiment of the membrane separation module. In FIG. 3, the membrane separation module (20) has a hose-shaped separation membrane (3) that is bent in a meandering shape and has the inside of the primary side passage.
(21), and the portion outside the separation membrane (3) in the vessel (2) is used as the secondary passage (22). The inlet and outlet of the raw material liquid are not formed on the upper and lower walls of the vessel (2), and the permeate collection pipe connection port (23) is formed on the lower wall. Also, the flange (9a) of the upper outlet (9) is fixed with the flange (24a) provided at the end of the raw material liquid supply pipe (24), and the flange (10a) of the lower outlet (10) is fixed. A flange (25a) provided at the end of the raw material liquid discharge pipe (25) is fixed to the. Then, the raw material liquid supply pipe (24) and the discharge pipe (25)
The packings (15) and (17) are respectively interposed between the flanges (24a) and (25a) and the expanded portions (3a) and (3b) at both ends of the hose-shaped separation membrane (3). The vessel (2) should preferably have a pressure resistant structure.

In such a constitution, the raw material liquid consisting of the organic liquid mixture is fed from the raw material liquid supply pipe (24) to the hose-shaped separation membrane.
It is sent into the primary side passageway (21) through the upper end opening of (3), flows in a zigzag manner inside, and is discharged from the lower end opening. At this time, when the pressure in the secondary passage (22) inside the vessel (2) is reduced to a vacuum state, vapor permeates the peripheral wall portion of the separation membrane (3), thereby separating the mixture.

In the above embodiments, the case where the membrane separation module according to the present invention is applied to the pervaporation method is shown, but the invention is not limited to this, and reverse osmosis, ultrafiltration, microfiltration, It can be applied to various membrane separations such as gas separation and vapor permeation. Further, although the vessel (2) is in the shape of a rectangular parallelepiped in the above-mentioned embodiment, it is not limited to this and can be appropriately changed.

[0021]

According to the membrane separation module of the present invention, the assembling work is simplified as described above. Moreover, the separation membrane can be easily replaced. Further, even if the seal between the openings at both ends of the hose-shaped separation membrane and other members is insufficient, it can be easily repaired. Further, since only a small number of small packings are used, the cost is low.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a membrane separation module according to the present invention.

FIG. 2 is a perspective view showing a method of manufacturing a hose-shaped separation membrane and a spacer.

FIG. 3 is a vertical sectional view showing another embodiment of the membrane separation module according to the present invention.

FIG. 4 is a vertical sectional view showing a conventional example.

FIG. 5 is a perspective view showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Membrane separation module 2 Vessel 3 Hose-shaped separation membrane 12 Flow path forming spacer (flow path forming member) 20 Membrane separation module

Claims (1)

Claim: What is claimed is: 1. A vessel and a hose-shaped separation membrane which is arranged in the vessel and has a flow path forming member built therein. Both ends of the hose-shaped separation membrane are open to the outside of the vessel. The most effective membrane separation module.