JPS594726Y2 - Separation device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a separation device for permeating and separating a solvent or fine solids from a stock solution using a permeable membrane.

BACKGROUND ART In order to purify factory waste liquid or sewage, or remove salt from seawater, devices in which a permeable membrane is provided on the outer peripheral surface of a liquid-permeable core material have been used.

However, this apparatus has a problem in that when the viscosity of the stock solution is high, the processing speed is significantly reduced.

The present invention relates to a separation device that solves the problems of the conventional products described above, in which an electric heating element is arranged inside or on the inner peripheral surface of a tubular or rod-shaped core material, and a permeable membrane is further provided on the outer peripheral surface of the core material. It is something to be dug.

Hereinafter, examples of the present invention will be explained with reference to the drawings.

In Fig. 1, 1 is a tubular core material with one end closed, which includes inorganic fibers such as glass fiber, carbon fiber, metal fiber, etc.
Nylon, polyester, acrylic, polyolefin,
Porous synthetic resin pipes reinforced with reinforcing fibers such as organic fibers such as cellulose, rayon, cotton, silk, and hemp; sintered pipes obtained by sintering metal powder or synthetic resin powder; perforated metal pipes; A resin pipe or a synthetic resin foamed pipe is used.

Inside this core material 1, a linear electric heating element 2 such as a nichrome wire is insulated and buried in a spiral shape, and on the outer peripheral surface of the core material 1, a cellulose derivative, a fluororesin, etc. A bag-shaped permeable membrane 3 is provided to protect the air from the air.

4 is a spacer for preventing the permeable membrane 3 from coming into close contact with the core material 1 and obstructing the flow of the permeated liquid during permeation treatment of the stock solution; material is used.

This spacer 4 can be omitted if the pressure acting on the separation device is low when it is used.

As the permeation membrane 3, a reverse osmosis membrane, an ultrafiltration membrane, a microfiltration membrane, or a filtration membrane is appropriately selected and used depending on the raw solution to be permeated.

In order to permeate the stock solution using this separation device, for example, as shown in Fig. 2, a predetermined number of separation devices (
When one tube (in the figure) is fixed in a pressure vessel 5 and the stock solution is pumped through the stock solution inlet 6 of the container 5, the permeate that has been permeated through the permeable membrane 3 flows out into the hollow portion 7 of the core material 1.

The concentrated stock solution is then discharged from the stock solution outlet 8 of the pressure vessel 5.

In the above example, a bag-shaped membrane was used as the permeable membrane 3, but in the present invention, a cylindrical permeable membrane or a sheet-shaped permeable membrane may be spiral-wound or swivel-wound.

Fig. 3 shows another example, in which a rod-shaped core material 1 is used, which is made of a liquid-impermeable material such as synthetic resin or metal, and whose outer peripheral surface is provided with longitudinal grooves 9 for flowing the permeated liquid. The electric heating element 2 is a wire-like electric heating element covered with an insulating coating similar to that shown in FIG. 2 and is embedded inside the core material 1.

Note that the groove 9 can be provided in a spiral shape on the outer peripheral surface of the core material 1, and furthermore, if the core material 1 is electrically insulating, it can be buried in the electric heating element 2 without providing an insulating coating. can.

FIG. 4 shows yet another example, in which a planar electric heating element 2 is tightly attached by gluing or the like to the inner circumferential surface of a tubular core material 1 which is made of a liquid-impermeable material and has grooves 9 on its outer circumferential surface. This is the separation device installed.

10 is asbestos for improving the thermal efficiency of the electric heating element 2;
This is a heat insulating layer made of synthetic resin foam or the like.

The planar electric heating element 2 may be (a) a metal foil circuit obtained by etching, punching, etc., (b) a woven or nonwoven fabric coated with a conductive paint and dried, (C
) Glass fibers or asbestos fibers woven into a net shape, coated with conductive paint and dried; (d) Rubber powder mixed with conductive powder and molded into a sheet, etc. are used.

This planar electric heating element 2 is usually insulated with a heat-resistant insulating film, sheet, etc., but if the core material 1 is liquid-impermeable and electrically insulating, it is not insulated. It can be embedded inside the core material 1.

In the present invention, in order to protect and reinforce the permeable membrane 3, a protective layer is provided on the outer peripheral surface of the permeable membrane 3 by winding a liquid-permeable material similar to the spacer 4, inserting a porous tube, etc. It is also possible to connect a temperature control device such as a thermostat or a temperature fuse to the electric heating element 2.

The present invention is constructed as described above, and since an electric heating element is built into the device, it can heat the liquid to be permeabilized and reduce its viscosity, so it can efficiently handle highly viscous liquids. It has the characteristics that it can be permeated, has a simple structure, and is easy to manufacture.

[Brief explanation of the drawing]

1, 3, and 4 are cross-sectional views showing an example of the separation device according to the present invention, and FIG. 2 is a longitudinal sectional view showing an example of the use of the separation device shown in FIG. 1. 1...Core material, 2...Electric heating element, 3.
...Permeable membrane, 4...Spacer, 9...
····groove.

Claims (3)

[Scope of utility model registration request] (1) A separation device in which an electric heating element is arranged inside or on the inner peripheral surface of a tubular or rod-shaped core material, and a permeable membrane is further provided on the outer peripheral surface of the core material. (2) The separation device according to claim 1, wherein a spacer made of a liquid-permeable material is interposed between the core material and the permeable membrane. (3) The separation device according to claim 1 or 2, wherein a groove for flowing the permeated liquid is provided on the outer peripheral surface of the core material made of a liquid-impermeable material.