JPS6291204A - Membrane separator - Google Patents

Abstract

PURPOSE:To reduce the loss of power, by connecting an ejector to the middle of a return pipeline, and connecting a space in a closed tank for a filtered liq. with the ejector port at a reduced pressure side. CONSTITUTION:An ejector 12 is connected to the middle of a return pipe 7 for returning a liq. before filtration leaving an outlet 6 for the liq. before filtration of a membrane separator body 2 to a tank 1 for the liq. before filtration, and a tank 9 for a liq. after filtration is made a closed one. A space 13 in the tank 9 unfilled with the liq. after filtration is connected through a short-cut pipe 15 with a port 14 of a reduced pressure side of the ejector 12. In this way, an operating pressure for the liq. before filtration passing through the body 2 is increased by pressure reduction both of the space 13 and of the side after filtration of the body 2 due to the restriction of the ejector 12. Power is reduced by an amount of the operating pressure with can be obtd. by the pressure reduction of the ejector 12.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to improvements in membrane separation devices.

[Conventional technology]

The pre-filtration liquid is transferred from the pre-filtration liquid tank (17) to the membrane separator main body (
The supply pipe (5) which is sent by the pump (4) to the pre-filtration liquid inlet (3) of 2) and the same membrane portion 111vi, ii main body (2)
The return pipe (power and membrane separator body (
2) A membrane separator of the type equipped with a recovery pipe 0■ for recovering the filtered liquid discharged from the filtered liquid outlet (8) into the filtered liquid link (9) is as shown in Fig. 1. A valve uI3 was connected in the middle of the return pipe (7) to increase the operating pressure by pressurizing the pre-filtration liquid passing through the membrane separator main body (2).

[Problem that the invention seeks to solve]

In the nine conventional membrane separators described above, the operating force is increased by simply throttling the valve QG, resulting in a large loss of power.

[Means for solving problems]

In the present invention, an ejector (17J) is connected to the valve α0, and the filtered liquid tank (9) is sealed, and the filtered liquid in the sealed filtered liquid tank (9) is filled with the filtered liquid. The purpose is to reduce the power loss by connecting the ejector (the depressurizing side port) to the empty space.

[Implementation row]

The embodiment of the present application shown in FIG.
The pre-filtration liquid discharged from the supply pipe (5) sent by the pump (4) and the pre-filtration liquid outlet (6) of the membrane separator main body (2) is returned to the above-mentioned pre-filtration liquid tank (1). Return pipe (7)
and a recovery pipe (9) for recovering the filtered liquid discharged from the filtered liquid outlet (8) of the membrane separator main body (2) to the filtered liquid outlet (9).
I (14) constitutes a membrane separation device equipped with a return υ pipe (
7), an ejector (σ2) is connected in the middle of the filter, and the filtered liquid tank (9) is sealed, and the space α3 in the sealed filtered liquid tank (9) that is not filled with filtered liquid is connected to the above-mentioned ejector. (α2 vacuum side port t14) and the short-circuit pipe (1
It is directly connected by 51. In addition, in the figure (LD indicates a pump for sending out the filtered liquid, and the mark indicates a pressure gauge.

[For production]

Since the present invention has the above-mentioned configuration, the membrane separator main body (
2) The operating pressure of the pre-filtration liquid passing through the ejector (uz
The reduced pressure side is the space (131) of the closed filtered liquid tank (9).
This is increased by reducing the pressure between the filtered side of the membrane separator main body (2) and increasing the pressure by squeezing the ejector (112). It is possible to make the size smaller, and instead of a valve, an ejector (u
Using z is effective in reducing power loss.

〔Effect of the invention〕

Since the present invention is as described above, it has an excellent effect of achieving the intended purpose.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing a conventional example, and FIG. 2 is a system diagram showing an embodiment of the present invention. (ri...tank, (2)...main body, (3)...inlet, (4)...pump, (5)...supply pipe line, (6
)...Outlet, (7)...Return pipe line, (81...Exit, (9)...Tank, 00...Recovery pipe line, (17
J・,, Ejector (1α3... Space, ■... Decompression side port, u3... Short circuit pipe, ae... Valve, αη...
・Pump, uto...pressure gauge. Use dust in the food industry! Applicant Technical Research Association

Claims (1)

[Claims] The pre-filtration liquid is transferred from the pre-filtration liquid tank (1) to the membrane separator main body (
The pre-filtration liquid discharged from the supply pipe (5) fed by the pump (4) to the pre-filtration liquid inlet (3) of 2) and the pre-filtration liquid outlet (6) of the membrane separator main body (2) is Pre-filtration liquid tank (
1) and the filtered liquid exiting from the filtered liquid outlet (8) of the membrane separator body (2) are transferred to the filtered liquid tank (
In a membrane separation device equipped with a recovery pipe (10) for recovering the filtered liquid, an ejector (12) is connected to the middle of the return pipe (7) or to the pre-filtration liquid outlet (6), and the filtered liquid is Tank (9
) is a closed type, and the space (13) which is not filled with filtered liquid in this closed type filtered liquid tank (9) is connected to the vacuum side port (14) of the ejector (12). Features of membrane separation equipment.