JP-2026075249-A - Flat film testing apparatus and flat film testing method

JP2026075249AJP 2026075249 AJP2026075249 AJP 2026075249AJP-2026075249-A

Abstract

[Problem] To enable membrane filtration and cleaning of the membrane after filtration. [Solution] The flat membrane testing apparatus 100 has a filtration unit 1 on the side wall of the liquid passage pipe 1E, which has a membrane at one end and a filtrate outlet 1A for discharging filtered wastewater, and a washing liquid injection port 1B at the other end for introducing washing liquid, and a drive unit for rotating the filtration unit 1 by 90 degrees. The orientation changing mechanism 4 positions the pipe vertically in the filtration step with the filtrate outlet 1A facing downwards and the washing liquid injection port 1B facing upwards, and positions the liquid passage pipe 1E horizontally in the washing step with the supply and discharge port 1C facing downwards. [Selection Diagram] Figure 1

Inventors

西村章
西村和

Assignees

株式会社流機エンジニアリング

Dates

Publication Date: 20260508
Application Date: 20241022

Claims (6)

A flat membrane testing apparatus for performing total filtration using a flat membrane and washing the flat membrane after filtration, comprising: a membrane mounting section to which a flat membrane is attached; a washing liquid nozzle provided to spray washing liquid onto the raw material side of the flat membrane attached to the membrane mounting section; a liquid passage pipe extending from the washing liquid nozzle to the membrane mounting section along the direction of the washing liquid spray so as to allow the washing liquid to pass through; a supply and discharge port provided in the side wall of the liquid passage pipe between the washing liquid nozzle and the membrane mounting section for supplying raw material and discharging washing liquid; and a filtrate discharge port connected to the filtrate side of the flat membrane attached to the membrane mounting section, wherein the apparatus comprises a filtration section, A direction-changing mechanism for changing the orientation of the filtration section between a filtration state in which the cleaning liquid injection port is located upward and the liquid passage tube is oriented vertically, and a cleaning state in which the supply and discharge port is located downward and the liquid passage tube is oriented horizontally, A liquid supply unit that supplies the liquid to the aforementioned supply and discharge port, A cleaning liquid supply unit that supplies cleaning liquid to the cleaning liquid nozzle, Equipped with, A flat membrane testing apparatus characterized by the following features.
The aforementioned orientation changing mechanism is a drive unit that changes the orientation of the filtration section by power, A measuring unit that automatically measures at least one of the filtration flow rate and the filtration differential pressure, When the measurement unit detects that the measured value has reached a predetermined value, the control unit stops the stock solution supply unit, drives the drive unit to change the orientation of the filtration unit from the filtration state to the washing state, and then starts the washing liquid supply unit. The flat membrane testing apparatus according to claim 1, further comprising:
The system is equipped with an activated carbon supply unit that supplies activated carbon slurry to the aforementioned inlet and outlet ports. A flat membrane testing apparatus according to claim 1 or claim 2.
A flat membrane testing method comprising total filtration using a flat membrane and washing of the flat membrane after filtration, A filtration unit is used, which includes a membrane mounting section to which a flat membrane is attached, a cleaning liquid nozzle provided to spray cleaning liquid onto the raw liquid side of the flat membrane attached to the membrane mounting section, a liquid passage pipe extending from the cleaning liquid nozzle to the membrane mounting section along the direction of spraying the cleaning liquid to allow the cleaning liquid to pass through, a supply and discharge port provided in the side wall of the liquid passage pipe between the cleaning liquid nozzle and the membrane mounting section for supplying raw liquid and discharging cleaning liquid, and a filtrate discharge port connected to the filtrate side of the flat membrane attached to the membrane mounting section. A film mounting step involves attaching a flat film to the aforementioned film mounting portion, The filtration step involves setting the filtration unit to a filtration state in which the washing liquid injection port is located at the top and the liquid passage tube is oriented vertically, supplying the raw liquid from the supply/discharge port by the raw liquid supply unit to perform total filtration by the flat membrane, and discharging the filtrate from the filtrate discharge port, After the filtration step, the inlet and outlet are positioned downwards and the liquid passage is oriented horizontally to create a washing state, and the washing liquid is sprayed from the washing liquid nozzle onto the raw liquid side of the flat membrane to wash the membrane, and the washing liquid is discharged from the inlet and outlet. A flat membrane testing method, including the following.
After the membrane attachment step and before the filtration step, The flat membrane testing method according to claim 4, comprising the step of: positioning the filtration unit such that the washing liquid injection port is located at the top and the liquid passage tube is oriented vertically, supplying activated carbon slurry to the supply and discharge port to perform total filtration by the flat membrane, attaching activated carbon to the surface of the flat membrane attached to the membrane mounting unit that faces the washing liquid injection port, and discharging the filtrate from the filtrate discharge port.
In the cleaning step, the cleaning liquid contains cleaning powders and granules. The flat film testing method according to claim 4 or 5.

Description

This invention relates to a flat film testing apparatus and a flat film testing method for raw materials such as process liquids. Membrane filtration technology is used in a wide range of fields. From the electronics and food industries to pharmaceuticals, biotechnology, and chemicals, membrane separation technology has become an indispensable part of the manufacturing process. When designing and constructing a system utilizing membrane filtration technology, it is crucial to conduct evaluation tests using the actual raw materials to be processed to verify various membrane performance characteristics and obtain information regarding the operating conditions in the actual process. Patent Document 1 discloses a flat film testing apparatus and a flat film testing method that enable comparison of multiple test systems without considering relative errors due to differences in measurement systems, even when multiple test systems are being measured. The invention of Patent Document 1 aims to provide a flat film testing apparatus that eliminates errors and enables comparison even when multiple test systems are being tested. Patent Document 2 discloses a separation membrane testing apparatus that allows for easy and rapid replacement of the separation membrane and disassembly of the cell. This apparatus uses a cross-flow filtration cell in which a flat-membrane separation membrane is installed. The treatment solution is flowed along the membrane surface of the separation membrane, and the permeate flows through the separation membrane, filtering the treatment solution. The membrane performance of the separation membrane is then tested by examining the components of the concentrated solution and permeate obtained through the separation membrane. Japanese Patent Publication No. 2019-166462Japanese Patent Publication No. 2002-45661 This is a schematic diagram of the entire device.This is a schematic diagram illustrating the filtration steps.This is a schematic diagram illustrating the washing step after the filtration step.This is a cross-sectional view taken through the central axis of the filtration section during the filtration step.This is a cross-sectional view taken through the central axis of the filtration section during the filtration step when activated carbon is impregnated.This is a cross-sectional view taken through the central axis of the filtration section during the washing step.This is a block diagram of the flat membrane testing apparatus.This is a flowchart of the flat film testing method. The following description will explain an example of the flat film testing apparatus 100 and its testing method with reference to the drawings. Note that the following description and drawings are merely illustrative examples of the present invention, and the content of the present invention should not be interpreted as being limited to this embodiment. (Flat membrane testing apparatus) Figure 5 shows an example of the configuration of the flat film testing apparatus 100. This flat film testing apparatus 100 has a main unit 101, a control unit 102, a measurement unit 103, and a recording unit 104. As shown in Figure 1, the main unit 101 comprises, as its main components, a filtration unit 1 in which a test flat membrane 70 is installed, a direction changing mechanism 4 for changing the orientation of the filtration unit 1, a raw liquid supply unit 101S for supplying the raw liquid to the filtration unit 1, and a cleaning liquid supply unit 101C for supplying a cleaning liquid such as clean water to the filtration unit 1. The filtration unit 1 includes a membrane mounting section 1D to which a flat membrane 70 is attached, a cleaning liquid injection port 1B provided to spray cleaning liquid onto the raw liquid side of the flat membrane 70 attached to the membrane mounting section 1D, a liquid passage pipe 1E extending from the cleaning liquid injection port 1B to the membrane mounting section 1D along the direction of cleaning liquid injection to allow cleaning liquid to pass through, a supply and discharge port 1C provided on the side wall of the liquid passage pipe 1E between the cleaning liquid injection port 1B and the membrane mounting section 1D for supplying raw liquid 73 and discharging cleaning liquid, and a filtrate discharge port 1A connected to the filtrate side of the flat membrane 70 attached to the membrane mounting section 1D. More specifically, the illustrated filtration unit 1 comprises a cylindrical liquid passage tube 1E, a first lid 1F attached to the opening at one end of the liquid passage tube 1E and having a filtrate outlet 1A in the center, a second lid 1G attached to the opening at the other end of the liquid passage tube 1E and having a washing liquid injection port 1B in the center, and a supply/discharge port 1C provided on the side wall of the liquid passage tube 1E. The surface of the first lid 1F facing the second lid 1G is covered with a liquid passage plate 71 such as a flat mesh