JPH0646497Y2 - External heat exchange type liquid mixture separation module - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an external heat exchange type liquid mixture separating module for separating a liquid mixture by a pervaporation method. More specifically, in a liquid mixture separating module having a fluid inlet / outlet and having a hollow fiber bundle incorporated therein for separating a liquid mixture by a pervaporation method, an outer casing having a heating jacket is provided on the outside. The present invention relates to a heat exchange type liquid mixture separating module.

[Conventional technology]

A so-called pervaporation separation in which a mixed liquid is supplied to the primary side (feed side) across a separation membrane and the secondary side (permeation side) is depressurized, or a carrier gas is flowed to permeate the substance to be separated in a gaseous state. The law has been studied since about 1950. Although the pervaporation separation method is considered to be suitable for separating azeotropic mixtures or mixtures with small boiling points that are difficult or difficult to separate by ordinary distillation, it has not yet been widely used industrially. . This is mainly due to the fact that the permeability of the membrane, that is, the separation coefficient and the membrane permeation rate are not large. (For example, JP-A-62-186907, 62-210008, 62-250906, 6
3-7803, 63-12304, 63-28409, 63-44904, etc.).

[Problems to be solved by the device] The pervaporative separation method is a separation method that necessarily involves a phase change from liquid to gas, and the amount of heat required for this phase change is covered by the sensible heat of the supplied mixed liquid. ing. Therefore, when the mixed liquid is separated by the usual pervaporation separation method, the temperature of the liquid in the separation device is gradually decreased, and the larger the amount of permeation through the membrane, the more remarkable the temperature decrease. The effect of temperature on the membrane separation performance in the pervaporation separation method is large, and improvement of the membrane itself is not sufficient for industrial application of the pervaporation separation method, and improvement of the module itself is also studied. It is important to.

However, in spite of the above-mentioned importance being pointed out, in the pervaporation separation method, there are few cases where the module itself has been examined from such agar. Therefore, an object of the present invention is to provide a module for separating a liquid mixture with high separation efficiency for use in separating a liquid mixture by pervaporation.

[Means for Solving the Problems]

The inventor of the present invention has studied the above-mentioned module for separating a liquid mixture to solve the above problems, and arrived at the present invention. That is, the present invention is a module for separating a liquid mixture, which has a fluid inlet / outlet and is provided with a hollow fiber bundle for separation of a liquid mixture by a pervaporation method, and has a heating jacket on the outside of the housing. An external heat exchange type liquid mixture separating module characterized by the above.

The present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of a liquid mixing and separating module of the present invention, and FIG. 2 is a schematic view showing another embodiment of the present invention. 1 is a fluid inlet to be treated, 2 or 11 is a membrane permeating fluid outlet, 3 is a membrane non-permeating fluid outlet, 4 is a heating fluid inlet or outlet, 5 is a heating fluid outlet or inlet, 6 is a jacket, and 7 is A hollow fiber bundle, 8 is a fixing flange, 9 is a bundle sheet, and 10 is a supporting member at the end of the hollow fiber bundle. 2 or 11 is usually connected to a vacuum line through a cooler.

The hollow fibers that constitute the hollow fiber bundle contained in the liquid mixture separating module of the present invention are commonly used, for example, cellulose-based, cellulose acetate-based, polyvinyl alcohol-based, polyacrylonitrile-based, polysulfone-based,
A hollow fiber made of a material such as polypropylene is used. The open end of the hollow fiber bundle is supported by a support member made of a potting material such as epoxy resin, unsaturated epoxy resin, urethane resin, or silicone resin, and is housed in the module.

In order to fix the hollow fiber bundle in the module, the hollow fiber bundle is formed with such a potting material and, for example, as shown in the drawing, it is fixed to the bundle sheet with a fixture such as a bolt or nut as shown in the drawing. Good. The open end of the hollow fiber bundle may be open at one end or open at both ends.

In the present invention, it is important to have a jacket on the outside of the housing. Normally, steam, hot water,
By flowing a heat medium such as oil and applying heat to the fluid to be treated, the temperature inside the module is prevented from decreasing and the liquid mixture is separated efficiently. Be free. The type of the jacket is not particularly limited as long as it is provided on the outside of the module housing. As an example, as shown in FIG. 1, a simple jacket is provided on the outside of the housing, and as shown in FIG. 2, a flexible jacket is provided.

The material of the module or the jacket is not particularly limited, and a material that is not soaked in the fluid in contact may be appropriately selected and used.

The fluid to be processed is often an organic liquid aqueous solution, but an organic liquid mixture or a liquid mixture in which a plurality of these are mixed is also processed.

In the liquid mixture separating module of the present invention, it is preferable to put a baffle inside and to improve the fluid flow by various means.

In order to separate a liquid mixture using the module of the present invention, a heating fluid is made to flow in a jacket and set to a desired temperature in advance. It may be carried out under control. The jacket type module of the present invention is preferably used when the membrane area is 5 m ² or less from the viewpoint of thermal efficiency.

[Effect of device]

According to the present invention, it is possible to provide a module for separating a liquid mixture by a pervaporation method having a heating jacket on the outside of the housing. When the liquid mixture is separated by the pervaporation separation method using such a module, a substantially isothermal operation can be performed, and the liquid mixture can be efficiently separated, which is industrially useful.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of the pervaporative module of the present invention, and FIG. 2 is a schematic view showing another embodiment. 1. …… Injected fluid inlet 2.11. …… Membrane permeate outlet 3. …… Membrane non-permeate outlet 4. …… Heating fluid inlet (outlet) 5. …… Heating fluid (inlet) outlet 6. …… Jacket 7. …… Hollow fiber bundle 8. …… Fixing flange 9. …… Bundle sheet 10. …… Supporting member

Claims (1)

[Scope of utility model registration request] 1. A module for separating a liquid mixture by a pervaporation method, which has a fluid inlet / outlet and a hollow fiber bundle is built-in, wherein a jacket for heating is provided outside the housing. External heat exchange type liquid mixture separation module.