JPS58143804A - Removal of preservative liquid of membrane separation module - Google Patents

Abstract

PURPOSE:To remove a preservative liquid in a membrane separation module economically in simple operation, by directly passing city water or industrial water through the membrane separation module having a selective permeable membrane from the stock liquid inflow port thereof. CONSTITUTION:The stock liquid inflow port 2 of a tubular membrane separation module 1 constituted from a selective permeable membrane with fractional M.W. of 1,000 or more and an outer cylinder 12 is connected to a spigot 5 of city water or industrial water by a hose 6 and a pressure control valve 7 and a pressure gauge 8 are attached to the side of a concentrate outtake port 3. When the spigot 5 is opened and the pressure in the module is adjusted to about 0.3kg/cm<2> by the pressure control valve 7 to directly pass city water or industrial water, a preservative liquid filling the inside of the selective permeable membrane 11 is instantaneously removed from the concentrate outtake port 3 and the preservative liquid filling the gap between the selective permeable membrane 11 and the outer cylinder 12 is removed from a permeate outtake port 4 by water permeated through the selective permeable membrane 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is economical and easy to operate! The present invention relates to a method for removing a storage solution from a desert separation module.

When separating solvents or solutes from stock solutions by reverse osmosis, ultrafiltration or microfiltration, it is known to use +1 separation modules.

Generally, when storing or transporting a membrane separation module, a preservation solution such as a glycerin aqueous solution or a formalin aqueous solution is filled inside the module. In order to remove the storage solution in the membrane separation module, it is necessary to remove the storage solution.
A method is often used in which a storage solution removal device d is installed separately from a return separation device incorporating a membrane separation module, and water is passed through the device at a relatively high pressure and high flow rate.

However, Kaminichi's method requires a water storage tank, pump, piping, etc. as a storage solution removal device, is expensive, and the removal operation is complicated. +7! f When removing the storage solution in the membrane separation module used for dense tree filtration, passing water through high pressure and high flow rate as in the past is an excessive method and is economically disadvantageous and disadvantageous. ,゛ko.

The present invention has been made to overcome the disadvantages of the prior art.t'1. For information on how to remove the storage solution in the C1 hood separation module,
This invention relates to a method for removing a storage solution from a 1-me separation module, characterized in that the storage solution in a simulated separation module having the above-mentioned selective permeability is removed by directly passing tap water or industrial water through it. be.

The method of the present invention can be applied to a membrane separation module C equipped with a selectively permeable membrane for fractionating molecules [1000 or more].
Examples of the material for the selective permeation 1 return include polyolefin, polysulfone, polyamide, polyimide, etc. Furthermore, the texture of the membrane separation module equipped with the selective permeation membrane is not particularly limited; type, spiral type, hollow fiber type, etc. can be used. In the present invention, the above! Use tap water or industrial water to store the storage solution filled in the container for separation and separation. Connect it directly to a faucet, for example, and run water through it to remove it.

Here, the operating pressure and the flow rate of tap water or industrial water differ depending on the membrane material, fractionated molecules, t1 module type, etc.
The operating pressure should be 0.3 Kg/az or more, and the flow rate should be 3 times or more the permeate flow rate. Operating pressure is 093Ky/Cl11
If the flow rate is less than 1, sufficient removal effect will not be obtained because the amount of permeate is small, and if the flow rate is more than 3 times the flow rate of permeate,
This is because impurities contained in tap water or industrial water accumulate and adhere to the membrane, deteriorating the membrane properties.

Therefore, in the present invention, C is an economical and simple method that does not cause any practical problems even when the module is directly connected to a faucet for tap water or industrial water. The storage solution can be removed well.

Hereinafter, an example of the present invention will be explained based on the drawings.

FIG. 1 shows an apparatus for removing a retention solution in the present invention,
Reference numeral 2 indicates a tubular type separation module, and the module 1 is provided with an inlet 2 for stock solution, 3 outlets for amm liquid, and an outlet 4 for taking out permeate.

In addition, tap water '1. A faucet 5 for water or industrial water is connected to the 1st and 6th ports a-C, and a liquid inlet and outlet 3 for the aIa liquid, a slow valve 7, and a pressure i8 are provided.

FIG. 2 is a sectional view of the one-cell separation module 1 shown in FIG.
In addition, the storage solution is filled inside the selective permeable membrane 0.11 and the gap between the selective permeable membrane 1Adll and the outer cylinder 12. Here, when all tap water or industrial water is passed through the membrane separation module 1, selectivity j! The storage solution filled in the inner chamber of fL-liquid 11 is instantly taken out 1l14a liquid l-1
The storage liquid filled in the gap between the selective permeation membrane 11 and the outer cylinder 12 is removed from the permeate outlet 4 by adding L to the water that has passed through the selective permeation membrane 11. Ru.

In addition, in the present invention, if necessary, a cartridge filter t is provided between the C1 tap water or industrial water faucet 5 and the raw solution inlet 2 to remove impurities contained in the water. You can also do it.

As described above, if the present invention is applied, the configuration is i1! - In addition, it does not require an expensive lk storage solution removal device, and has the advantage that the storage solution can be removed satisfactorily despite being economical and simple to operate.

Hereinafter, the present invention will be specifically explained in Examples 0 and 1.
+I11 Store the storage solution. Tap tap water at operating pressures of 0 and 9 to a tubular type ultrafiltration module (1: polyolefin membrane NTU-2020 manufactured by Nitto Seiki Kogyo Co., Ltd.) filled with an aqueous glycerin solution. Kg/at, flow rate 131!
The glycerin aqueous solution was removed by passing water through the tube at a rate of /min, and the results are shown in FIG.

Example 2 Tap water was applied to the same module as in Actual Mfi Example 1 at an operating pressure of 1
. The glycerin aqueous solution was removed by passing water through it at a flow rate of 5Kf/aII+ and Wk201/min, and the results are shown in FIG.

It can be seen that the lycerin concentration has decreased and the glycerin aqueous solution in the module has been successfully removed.

[Brief explanation of drawings]

Figure 1 is a front view showing an example of a device for removing the storage solution in the +@ separation module according to the present invention, Figure 2 is a sectional view of the membrane separation module in Figure 1, and Figure 3 is an implementation of the present invention. Glycerin a of permeate versus elapsed time in example
It represents degree. 1... Membrane separation module, 11... Song-selective permeable membrane, 12... Outer cylinder Patent applicant Nitto Seiki Kogyo Co., Ltd. Representative Sanbe Hijikata

Claims (1)

[Claims] A method for removing the stored liquid in the membrane separation module (in this method, the stored liquid gold, tap water, or industrial water in the membrane separation module equipped with selective permeation exchange for fractionated molecules @ 1000 or more L) is directly removed. Method 0 for removing a membrane separation module storage solution characterized by removing it by passing water through it