Measuring apparatus for membrane fouling index

Patent metadata

Field	Value
Publication number	US-2016238513-A1
Application number	US-201514950535-A
Country	US
Kind code	A1
Filing date	Nov 24, 2015
Priority date	Feb 12, 2015
Publication date	Aug 18, 2016
Grant date	—

Abstract

A device for measuring the membrane fouling index which can measure the modified fouling index (MFI) and the silt density index (SDI) at the same time and quantify the degree of membrane fouling caused by various kinds of membrane fouling materials, such as particulate materials, colloids, organic matters, and so on, in a short period of time.

First claim

What is claimed is:

1 . A device for measuring membrane fouling index comprising:
a raw water supplying unit configured to supply raw water to be measured; a filtration membrane; a raw water supply line which connects the raw water supplying unit with the filtration membrane; a flow rate measuring unit configured to measure a flow rate; and an SDI/MFI measurement line which connects the filtration membrane with the flow rate measuring unit, wherein a modified fouling index (MFI) and a silt density index (SDI) are measured at the same time using a flow rate passing through the SDI/MFI measurement line.

2 . The device for measuring membrane fouling index according to claim 1 , further comprising:
a level sensor which is mounted on the SDI/MFI measurement line and configured to measure the SDI.

3 . The device for measuring membrane fouling index according to claim 1 , further comprising:
a field equipment connecting unit for connecting field equipment configured to measure the SDI to the SDI/MFI measurement line.

4 . The device for measuring membrane fouling index according to claim 1 , further comprising:
a pressure controller which is mounted at a filtration membrane inlet of the raw water supply line and configured to control pressure of raw water that flows into the filtration membrane.

5 . A device for measuring membrane fouling index comprising:
a raw water supplying unit configured to supply raw water to be measured; a first filtration membrane; a raw water supply line which connects the raw water supplying unit with the first filtration membrane; one of a level sensor or a field equipment configured to measure the SDI from permeated water passing through the first filtration membrane; a flow rate measuring unit configured to measure a flow rate; an MFI measurement line which connects the flow rate measuring unit with the one of the level sensor or the field equipment; a buffer tank which is mounted on the MFI measurement line to store the first permeated water discharged from the one of the level sensor or the field equipment; and a second filtration membrane which is mounted between the flow rate measuring unit and the buffer tank mounted on the MFI measurement line and has filtration characteristics different from the first filtration membrane.

6 . The device for measuring membrane fouling index according to claim 1 , further comprising:
a valve which is formed on the MFI measurement line to cause the first permeated water stored in the one of the level sensor or the field equipment flow into the buffer tank.

7 . The device for measuring membrane fouling index according to claim 5 , wherein the SDI measurement in the one of the level sensor or the field equipment and the MFI measurement using the flow rate passing through the MFI measurement line are achieved at the same time.

8 . The device for measuring membrane fouling index according to claim 5 , further comprising:
a pressure controller which is mounted at an inlet of the second filtration membrane to control pressure of the first permeated water that flows into the second filtration membrane.

9 . The device for measuring membrane fouling index according to claim 5 , wherein pores of the second filtration membrane are smaller than pores of the first filtration membrane.

10 . A device for measuring membrane fouling index comprising:
a raw water supplying unit configured to supply raw water to be measured; a first filtration membrane; a raw water supply line which connects the raw water supplying unit with the first filtration membrane; a flow rate measuring unit configured to measure a flow rate; an SDI/MFI-1 measurement line which connects the flow rate measuring unit with the first filtration membrane; a level sensor which is mounted on the SDI/MFI-1 measurement line to measure the SDI; an SDI/MFI-2 measurement line which connects the flow rate measuring unit with the level sensor to be connected with the SDI/MFI-1 measurement line; a buffer tank which is mounted on the SDI/MFI-2 measurement line to store the first permeated water discharged from the level sensor; and a second filtration membrane which is mounted between the flow rate measuring unit and the buffer tank mounted on the SDI/MFI-2 measurement line and has filtration characteristics different from the first filtration membrane.

11 . The device for measuring membrane fouling index according to claim 10 , further comprising:
a valve provided on the MFI-2 measurement line to cause the first permeated water stored in the level sensor to flow into the buffer tank.

12 . The device for measuring membrane fouling index according to claim 10 , wherein the SDI measurement in the level sensor, the MFI-1 measurement of the first filtration membrane using the flow rate passing through the SDI/MFI-1 measurement line, and the MFI-2 measurement of the second filtration membrane using the flow rate passing through the MFI-2 measurement line are achieved at the same time.

13 . The device for measuring membrane fouling index according to claim 10 , further comprising:
a pressure controller which is mounted at an inlet of the second filtration membrane to control pressure of the first permeated water that flowed into the second filtration membrane ( 200 b ).

14 . The device for measuring membrane fouling index according to claim 10 , wherein pores of the second filtration membrane are smaller than pores of the first filtration membrane.

Assignees

• Doosan Heavy Ind & Construction Co Ltd

Inventors

• Moon Jong Hyuk
• Jin Yang Oh
• Choi Hyun Sung
• Kim Sung Hoon

Classifications

• G01N17/008 Primary

  Monitoring fouling · CPC title

• B01D2321/40

  Automatic control of cleaning processes · CPC title

• B01D61/12

  Controlling or regulating · CPC title

• B01D61/10 Primary

  Accessories; Auxiliary operations · CPC title

• B01D65/109 Primary

  Testing of membrane fouling or clogging, e.g. amount or affinity · CPC title