JP2836980B2 - Membrane module - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a membrane module using a flat membrane pervaporation membrane used in a membrane separation apparatus.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view of a conventional membrane module, and FIG. 5 is an enlarged view of a portion Y in FIG. In FIG. 4, 4 is a frame, and 5 is an end plate. In FIG.
1 is a flat membrane-shaped pervaporation membrane, 2 is an uneven partition plate supporting the membrane, and 3 is a permeated gas plate for extracting permeated gas. 5A shows the stock solution, and B shows the permeated gas. The frame 4 and the end plate 5 include a plurality of pervaporation membranes 1, a partition plate 2,
And a plate 3 for assembling the permeated gas. The reason why the partition plate is uneven is that the undiluted solution
Generates turbulence, prevents concentration polarization of the stock solution,
This is for improving the performance.

[0003] In a membrane separation apparatus using a pervaporation membrane, when a liquid is separated by the membrane, the undiluted solution is exposed to heat of vaporization due to a phase change from liquid to gas due to permeation through the membrane, and the temperature decreases. In order to obtain good membrane separation performance, it is necessary to raise the temperature of the stock solution to a temperature suitable for permeation. For this reason, in the conventional membrane separation apparatus, it is necessary to separate the membrane so that the temperature drop of the undiluted solution due to permeation falls within a certain range, modularize the membrane, and equip these in multiple stages to obtain a required membrane capacity (area). General.

FIG. 6 is a system diagram of a membrane separation apparatus equipped with a plurality of membrane modules as described above. In the figure, 10 is a membrane module, 11 is a reheating mechanism generally called a reheater, 12 is a temperature sensor, and C is a concentrated liquid. In the illustrated system, an external (separate) reheating mechanism 11 is provided between the membrane modules 10 to reheat the undiluted solution in the preceding module, and the temperature sensor 12 is heated to a temperature suitable for permeation in the next module. The temperature is controlled by and supplied.

[0005]

As described above, in the conventional case, it is necessary to raise the temperature of the stock solution by an external reheating mechanism (reheater) for each membrane module. However, it is necessary to equip a large number of reheating mechanisms, and there is a drawback that the membrane separation device is increased in size and weight. In particular, the conventional membrane module uses a large number of membranes and membrane support plates in an overlapping manner, so that a very thick end plate is used to prevent internal liquid from leaking out from these contact surfaces or air from flowing into the interior. It is necessary to firmly assemble and assemble using a frame, and the synergistic effect of this and the multi-stage structure has caused the membrane separation apparatus to be larger and heavier.

An object of the present invention is to solve the above-mentioned disadvantages of the prior art and to provide a membrane module capable of reducing the size and weight of a membrane separation device.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a frame and an end play outside.
In the membrane module for the membrane separation device, which is provided with a flat membrane-shaped pervaporation membrane and an uneven partition plate, and has a raw solution flow path and a permeated gas flow path formed therein, On the stock solution side of the partition plate in the stock solution channel,
In direct contact with the undiluted solution, and along the partition plate
Further , the present invention relates to a membrane module incorporating a concave-convex reheating mechanism composed of a self-temperature control type electric heater .

[0008]

When a conventional membrane module is used to constitute a membrane separation apparatus, an external reheating mechanism is required. However, in the membrane module of the present invention, the reheating mechanism is incorporated in the module. As a result, the external type is not required, and the piping provided outside is also unnecessary, so that the overall size and weight can be reduced.

Since the reheating mechanism is built in the module, it is not necessary to divide the module into multi-stage modules, and the entire film can be configured as a single-stage module, so that the number of heavy end plates and the like can be reduced. In addition, the size and weight can be reduced.

The reheating mechanism is provided with an uneven partition plate.
The reheating mechanism and the partition press
There is no undiluted solution stagnation between the plate and the plate. In addition,
The surface of the reheating mechanism becomes uneven due to
As with technology, the turbulence effect prevents concentration polarization of the stock solution.
Therefore, the module performance does not decrease.

[0011]

1 is a sectional view of an embodiment of a membrane module according to the present invention, and FIG. 2 is an enlarged view of a portion X in FIG. In FIG. 1, 4 is a frame, and 5 is an end plate. In FIG. 2, 1 is a permeated vaporized membrane in the form of a flat membrane, 2 is a partition plate supporting the membrane, 3 is a plate for permeated gas provided with a number of holes for extracting permeated gas, and 6 is a stock solution of the partition plate 2 This is a so-called reheater provided on the side. The reheater 6 is a self-temperature control type electric heater, and its surface has an uneven shape (including a waveform). A is a stock solution and B is a permeated gas. The frame 4 and the end plate 5 include a plurality of pervaporation membranes 1, a partition plate 2, a permeated gas plate 3, and a reheater 6.
It is for assembling.

FIG. 3 is a system diagram of a membrane separation apparatus using the above-mentioned membrane module, showing the flow of a stock solution and temperature control in the membrane module. C is a concentrate.
The meanings of the other symbols are as described above. The stock solution A is supplied into the first module, where it flows while being heated and maintained at an appropriate permeation temperature by a self-temperature control type reheater 6 provided on the partition plate 2 of the stock solution passage section, and is formed into a flat membrane pervaporation membrane. At 1, transmission is performed. Here, the undiluted solution whose temperature has dropped flows into the next module, and the same processing as described above is performed. This is done for all required modules.

By using the membrane module of the present embodiment having the above-described configuration and operation, (1) reduction in size and weight of the membrane module (2) reduction in membrane capacity (area) (3) miniaturization of the membrane separation device And weight reduction are achieved.

[0014]

According to the membrane module of the present invention , a self-temperature control type electric heater is provided on the stock solution side of the partition plate in the stock solution flow passage in the membrane module in a state directly contacting the stock solution.
Since the reheating mechanism is incorporated, the size and weight of the membrane separation device can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of a membrane module of the present invention.

FIG. 2 is an enlarged view of a portion X in FIG. 1;

FIG. 3 is a system diagram of a membrane separation device using the membrane module of the embodiment.

FIG. 4 is a cross-sectional view of a conventional membrane module.

FIG. 5 is an enlarged view of a Y part in FIG. 4;

FIG. 6 is a system diagram of a conventional membrane separation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pervaporation membrane 2 Partition plate 3 Plate for permeated gas 4 Frame 5 End plate 6 Reheater 10 Membrane module 11 Reheating mechanism 12 Temperature sensor A Stock solution B Permeated gas C Concentrate

Continuing on the front page (72) Inventor Soichiro Shibata 1-3-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company (72) Inventor Noriyuki Shimamura 1-3-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company (72) Inventor Akio Iwama 1-1-2 Shimohozumi, Ibaraki-shi, Osaka, Japan Nippon Denko Corporation (72) Inventor Eiji Hata 1-2-1, Shimohozumi, Ibaraki-shi, Osaka, Japan Nitto Denko Corporation (72) Inventor Toshiyuki Kawashima 1-2-1, Shimohozumi, Ibaraki-shi, Osaka Nitto Denko Corporation (72) Inventor Takeshi Nihei 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi Mitsubishi Heavy Industries, Ltd. Inside the Kobe Shipyard (72) Inventor Seiichi Terakura 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi Mitsubishi Heavy Industries, Ltd.Kobe Shipyard (72) Inventor Hideo Iida 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (56) Reference JP-A-63-59310 (JP, A) Sho 61-37201 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B01D 61/36 B01D 63/08 B01D 65/00

Claims (1)

(57) [Claims] An exterior is constituted by a frame and an end plate, and a flat membrane-shaped pervaporation membrane and a concave are formed inside the frame.
In a membrane module for a membrane separation device having a convex partition plate, in which a stock solution channel and a permeated gas channel are formed,
In the undiluted liquid flow path inside, the undiluted solution side of the partition plate, in direct contact with the undiluted solution, and along the partition plate
And a built-in unevenness reheating mechanism comprising a self-temperature control type electric heater .