JPH0611075Y2 - Pervaporation membrane module - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a pervaporative membrane module, and more particularly to a pervaporative membrane module capable of obtaining a good flow state of an organic liquid on a module plate.

[Prior art]

In recent years, pervaporation membranes have been attracting attention as a separation method in which a specific component in a liquid mixture supplied to the primary side of a membrane permeates to the secondary side of the membrane, is vaporized, and is taken out in a vapor state.

When the pervaporation membrane is actually used, for example, a pervaporation membrane module as shown in FIG. 3 is manufactured in order to support the membrane and give strength to the membrane.

That is, FIG. 3 shows a thin flat plate type membrane module, in which 1,1 is a cell plate, and the active layer is polyvinyl alcohol on these cell plates 1,1 via cell gaskets 2,2. Pervaporation membranes 3 made of alcohol or the like are arranged. Perforated plates 4 and 4 are laminated on the outer sides of these pervaporation membranes 3 and 3, and wire meshes 5 and 5 are further arranged on the outermost sides.
Are stacked. In the figure, 6 and 6 are dispersion plates and 7, 7
Is a dispersion baffle, 8 and 8 are rubber rings, and 9 is an end plate.

Therefore, as shown by the arrows in the figure, the pervaporation membranes 3, 3
The specific component of the organic liquid supplied to the primary side of the permeation vaporizes into the secondary side of the pervaporation membranes 3 and 3 where the specific components pass through the pervaporation membranes 3 and 3 and is kept at a reduced pressure, and is externalized by an appropriate means. Taken out. On the other hand, the remaining organic liquid from which the specific component has been removed is discharged from the outlet 9a of the end plate 9 along the arrow direction.
More discharged.

However, since the conventional membrane module as described above has a thin layer channel structure and a simple channel structure, the liquid flow on the cell plates 1 and 1 is as shown by the arrow in FIG. Entrance 1
Short pass from a, 1a to the liquid outlets 1b, 1b, a large dead water area is generated around them, and the temperature difference between the pervaporation membranes 3, 3 membrane and the liquid bulk 7 becomes large, and the separation performance is increased. However, there was a problem in that Further, because of the thin layer, there is a possibility that the active layer of the pervaporation membranes 3, 3 may adhere to the cell plates 1, 1 when the plant is stopped or the membrane module is transported or attached, resulting in membrane damage. .

[Problems to be solved by the device]

The present invention has been made in order to solve the above-mentioned conventional problems, and an object thereof is to provide a pervaporation membrane module that can obtain a good flow state of an organic liquid on a module plate.

[Means for Solving the Problems]

In order to achieve the above object, the pervaporation membrane module according to the present invention is characterized in that a plurality of weir plates for liquid flow dispersion are arranged in multiple stages in the liquid flow direction on the upper surface of the module plate.

[Action]

According to the above configuration, the organic liquid from the liquid inlet reaches the liquid outlet after being evenly dispersed and flowed over substantially the entire area of the upper surface of the module plate by the weir plate.

〔Example〕

An embodiment of the membrane module of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, 1 is a substantially square cell plate and 2 is a cell gasket, which is the same as in FIGS. 3 and 4.

On the upper surface of the cell plate 1, a plurality of dam plates 10 for liquid flow dispersion are arranged in multiple stages from the liquid inlet 1a to the liquid outlet 1b.

The barrier plates 10 are provided on the inner side of the upper surface of the cell plate 1 excluding the outer peripheral portion thereof, and as shown in FIG. 2, a predetermined gap is formed between the barrier plate 10 and the membrane surface of the pervaporation membrane 3. The height is set so that Further, the weirs 10 ... Are formed separately from the flat cell plate 1 and fixed to the upper surface of the cell plate 1 by an appropriate means, and the material thereof is one that is difficult to adhere to the pervaporation film 3. For example, if the active layer is polyvinyl alcohol, the surface of which is treated with Teflon is selected.

Other configurations are the same as those in FIGS. 3 and 4, so detailed description will be omitted here with reference to FIGS. 3 and 4.

As described above, in this embodiment, the weirs 10 ...
Since they are formed separately, there is an advantage that the smoothness of the cell plate 1 can be easily obtained, and in particular, a multi-layer type membrane module can be manufactured accurately and easily.

[Effect of device]

As described above, according to the present invention, the plurality of dam plates for distributing the liquid flow are arranged on the upper surface of the module plate in multiple stages in the liquid flow direction. It is possible to disperse evenly, and thus a large temperature strain in the vertical direction of the membrane can be avoided to improve the separation performance. Further, since the above-mentioned baffle plate also serves as a spacer between the plate upper surface and the film surface, the active layer of the film does not adhere to the plate upper surface and the film is not damaged when the plant is stopped.

[Brief description of drawings]

FIG. 1 is a plan view of an essential part showing an embodiment of the membrane module of the present invention, and FIG. 2 is a sectional side view of the essential part. FIG. 3 is a side sectional view of a conventional membrane module, and FIG. 4 is a plan view of a main part thereof. 1 ... cell plate, 2 ... cell gasket, 3 ... pervaporation membrane, 10 ... weir.

Claims (1)

[Scope of utility model registration request] 1. A pervaporation membrane module, wherein a plurality of weir plates for dispersing a liquid flow are arranged on the upper surface of a module plate in multiple stages in the liquid flow direction.