WO2002014850A1 - A process and device for continuous ionic monitoring of aqueous solutions - Google Patents
A process and device for continuous ionic monitoring of aqueous solutions Download PDFInfo
- Publication number
- WO2002014850A1 WO2002014850A1 PCT/US2001/025264 US0125264W WO0214850A1 WO 2002014850 A1 WO2002014850 A1 WO 2002014850A1 US 0125264 W US0125264 W US 0125264W WO 0214850 A1 WO0214850 A1 WO 0214850A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compartment
- cathode
- anode
- inlet
- sample
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
Definitions
- the present invention relates to the measurement of the conductivity of ionic species in water and to enhanced conductivity measurements of "cation conductivity” and "anion conductivity.”
- cation conductivity is defined as the conductivity of a sample in which essentially all of the cations in the sample have been replaced with hydrogen ions.
- anion conductivity is defined as the conductivity of a sample in which essentially all of the anions in the sample have been replaced with hydroxyl ions.
- the cation conductivity and the anion conductivity are important measurements because they give an indication of the ionic purity of the water being tested.
- the water flowing into high pressure steam boilers must be continuously monitored for ionic purity and treated to prevent corrosion of the boiler tube walls, the steam turbines, and the condensers.
- Sample streams from various parts of the system must be monitored for specific conductivity and cation conductivity. The length of time that a stream can be monitored for cation conductivity is dependent on the size of the cation exchange column being used to treat samples or a sample stream, the sample stream flow rate, and the number of cations present in the water.
- the present invention relates to aqueous stream monitoring using a continuous electrochemical regeneration of ion exchange material.
- Cation conductivity measurements are taken using a conventional conductivity cell, together with well-known temperature correction techniques, on a sample stream that has been passed through or otherwise in contact with a cation exchange material which absorbs essentially all of the cations in the stream and replaces them with hydrogen ions.
- this cation exchange material is continuously regenerated by the passage of hydrogen ions which are produced in an adjacent source of such hydrogen ions, such as an anode compartment which is separated from the cation exchange material by a cation exchange membrane, or a bipolar membrane which is in contact with a portion of the cation exchange material.
- another portion of the cation exchange material is maintained in contact with a cation exchange membrane which isolates the cathode compartment to which the cations originally absorbed by the cation exchange material migrated under the influence of a DC voltage gradient.
- anion conductivity measurements are taken using a conventional conductivity cell, together with temperature correction techniques, on a sample stream that has been passed through or otherwise in contact with an anion exchange material which absorbs essentially all of the anions in the stream and replaces them with hydroxyl ions.
- this anion exchange material is continuously regenerated by the passage of hydroxyl ions which are produced in an adjacent source of such hydroxyl ions, such as a cathode compartment which is isolated from the anion exchange material by an anion exchange membrane, or a bipolar membrane which is in contact with a portion of the anion exchange material.
- another portion of the anion exchange material is maintained in contact with an anion exchange membrane which isolates the anode compartment to which the anions originally absorbed by the anion exchange material migrated under the influence of a DC voltage gradient.
- the temperature- corrected specific conductivity, the temperature-corrected cation conductivity and the temperature-corrected anion conductivity determined in accordance with this invention can be used in calculations to highly accurately determine the pH of the sample stream being monitored.
- This method of determining the pH of high purity water also has the benefits of stability, lack of drift, and lack of contamination which are problematic for conventional pH measuring devices when used for high purity water.
- the present invention also contemplates the independent use of cation exchanger units as herein described for monitoring the cation conductivity of a sample, and the independent use of anion exchanger units as herein described for monitoring the anion conductivity of a sample.
- Fig. 1 is a schematic cross sectional view of an ion exchange unit according to a first embodiment of the present invention wherein ion exchange material is contained between walls of ion exchange membrane which walls contain or are otherwise in contact with electrodes.
- Figs. 2 A and 2B are schematic top and cross sectional views respectively of an ion exchange unit according to an alternative embodiment of the present invention wherein an ion exchange membrane is also used as the ion exchange material.
- Fig. 3 is a schematic process flow diagram illustrating a continuous ionic monitoring system for aqueous solutions according to the present invention wherein two ion exchange units, comparable to those illustrated in Fig. 1 or Figs. 2A and 2B, are utilized in a parallel configuration.
- the present invention is based on the novel idea of performing continuous ionic monitoring of aqueous solutions by continuously regenerating ion exchange materials by means of an applied DC electrical current.
- a cation conductivity sample stream and an anion conductivity sample stream are treated and measured for conductivity.
- the cation conductivity sample stream after exiting the conductivity meter, part or all of the stream flows past the anode (positive) electrode, then flows by a fluid conduit means past the cathode and continues on to waste.
- hydrogen ions are produced by the electrolysis of water from the previously measured sample stream, and these hydrogen ions migrate, under the influence of a DC voltage, through a cation exchange membrane, into the cation exchange material, where they regenerate the cation exchange material by displacing other cations which had been absorbed from the sample stream. These displaced cations then migrate under the influence of the DC voltage through a cation exchange membrane and to the cathode (negative) electrode and into the waste stream flowing from the anode compartment and through the cathode compartment.
- electrodes 170 and 171 are physically separated from the bulk of the ion exchange material 172 by means of an ion exchange membrane 173 of the same charge as that of the bulk material.
- the membrane 173 and the walls of the container form a compartment 174 in which the electrode 170 is contained and through which the previously measured sample flows to provide water for electrolysis and to sweep away gas bubbles generated by the electrode. It is preferred that the electrode be in contact with the cation exchange membrane 173, or that the compartment 174 be filled with an ion exchange material of the same charge as that of the membrane.
- ion exchange membrane 180 is used as the ion exchange material, as schematically illustrated in Figs. 2A and 2B.
- a flat sheet of ion exchange membrane 180 is clamped between two electrically insulating plates 181 by means of bolts through holes 188 around the periphery of the plates.
- An inlet means 182 is provided for the sample stream which then flows in channels 183 contacting the ion exchange membrane 180 and through outlet means 184 to the conductivity meter.
- membrane 180 will be a cation exchange membrane, and the anode 185 will produce hydrogen ions by means of water electrolysis to continuously regenerate the membrane 180.
- FIG. 3 one form of a continuous ionic monitoring system according to the present invention is schematically illustrated using two ion exchange units according to this invention in a parallel configuration.
- the system includes a sample fluid inlet 200 connected by a fluid conduit to a conductivity meter 201, which contains a mechanism for continuously measuring both the conductivity and the temperature of the sample stream.
- the sample flows by means of a fluid conduit 202 into a stream divider 210, typically a T-junction or valve, which in turn is connected by means of fluid conduits 220 and 221 respectively to the inlet of a continuously regenerated cation exchanger vessel 230 according to this invention and to the inlet of a continuously regenerated anion exchanger vessel 240 according to this invention.
- a stream divider 210 typically a T-junction or valve
- fluid conduits 220 and 221 respectively to the inlet of a continuously regenerated cation exchanger vessel 230 according to this invention and to the inlet of a continuously regenerated anion exchanger vessel 240 according to this invention.
- electrodes 231 and 232 (vessel 230) and electrodes 233 and 234 (vessel 240) are spaced apart with the respective cation or anion ion exchange materials disposed between them.
- the ion exchange materials may be in the form of beads, particles, fibers, screens, or membranes.
- the respective treated sample portions flow out of the two exchangers and, by means of fluid conduits 241 and 242 respectively pass through conductivity meters 250 and 251 respectively, each containing a mechanism for continuously measuring both the conductivity and temperature of the respective treated sample stream portions.
- the electrical outputs from the conductivity meters are sent to a computing system 265 where the pH of the sample stream is automatically calculated from the continuously generated conductivity and temperature data.
- a cation exchanger unit in accordance with the present invention can be constructed without an integral cathode, provided that an electric field is established across the unit utilizing the anode element of the unit, and provided that a waste stream flow path is provided along what would be the cathode side of the unit for removal of displaced cations.
- an anion exchange unit in accordance with the present invention can be constructed without an integral anode.
- the cation exchanger unit and the anion exchanger unit can be consolidated into a single unit by eliminating the cathode element of the cation exchanger, eliminating the anode element of the anion exchanger, and positioning the cation exchanger compartment back-to-back with the anion exchanger compartment.
- K s 1/1000 (CH S L H + CA S L A + C M S L M + COH S LOH)
- k cc 1/1000 (CH CC L H + CA CC L A + COH CC OH)
- k AC 1/1000 (CH AC L H + C M AC LM+ COH AC LOH)
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Food Science & Technology (AREA)
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002212957A AU2002212957A1 (en) | 2000-08-11 | 2001-08-10 | A process and device for continuous ionic monitoring of aqueous solutions |
EP01981302A EP1322943A1 (en) | 2000-08-11 | 2001-08-10 | A process and device for continuous ionic monitoring of aqueous solutions |
JP2002519929A JP2004506895A (en) | 2000-08-11 | 2001-08-10 | Method and apparatus for continuous ion monitoring of aqueous solution |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US22450000P | 2000-08-11 | 2000-08-11 | |
US60/224,500 | 2000-08-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002014850A1 true WO2002014850A1 (en) | 2002-02-21 |
WO2002014850A9 WO2002014850A9 (en) | 2005-01-13 |
Family
ID=22840970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/025264 WO2002014850A1 (en) | 2000-08-11 | 2001-08-10 | A process and device for continuous ionic monitoring of aqueous solutions |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1322943A1 (en) |
JP (1) | JP2004506895A (en) |
CN (1) | CN1444729A (en) |
AU (1) | AU2002212957A1 (en) |
WO (1) | WO2002014850A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018036612A1 (en) * | 2016-08-23 | 2018-03-01 | Swan Analytische Instrumente Ag | Device and method for the electrodeionization of a liquid |
CN111233086A (en) * | 2020-03-16 | 2020-06-05 | 佛山市云米电器科技有限公司 | One-way anion exchange type water filtering and purifying system and method and water purifier |
RU201094U1 (en) * | 2019-06-28 | 2020-11-26 | Цзянсуская корпорация по ядерной энергетике | Device for continuous measurement of changes in the electrical conductivity of deionized water in a tank |
CN113552178A (en) * | 2021-05-27 | 2021-10-26 | 华电电力科学研究院有限公司 | Automatic continuous measurement method for hydrogen conductivity in steam-water sampling |
CN114062622A (en) * | 2020-07-31 | 2022-02-18 | 力合科技(湖南)股份有限公司 | Sampling effectiveness monitoring method and intelligent sampling bottle |
CN114428105A (en) * | 2021-12-16 | 2022-05-03 | 华能南京燃机发电有限公司 | Device and method for detecting multiple indexes of water vapor of gas turbine power station |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4631313B2 (en) * | 2004-05-28 | 2011-02-16 | 三浦工業株式会社 | Water supply system |
EP1873361A1 (en) * | 2006-06-28 | 2008-01-02 | Siemens Aktiengesellschaft | Measuring device for measuring the purity of a working fluid circuit of a power plant and method for operating the measuring device |
CN102156152B (en) * | 2011-02-25 | 2012-07-25 | 西安热工研究院有限公司 | Online detection method and device for total organic carbon of power plant water supply |
CN102156151A (en) * | 2011-02-25 | 2011-08-17 | 西安热工研究院有限公司 | Method and device for continuously determining electrical conductivity of electric regeneration type hydrogen |
CN107561127A (en) * | 2017-06-26 | 2018-01-09 | 海南核电有限公司 | It is a kind of integrated from regeneration hydrogen conductivity negative electricity conductance and the measurement apparatus of total conductivity |
CN108254415A (en) * | 2018-03-06 | 2018-07-06 | 西安西热电站化学科技有限公司 | A kind of hydrogen conductivity measuring system |
CN112946027A (en) * | 2021-03-11 | 2021-06-11 | 烟台方心水处理设备有限公司 | pH on-line detection method for super-alkaline electrolyzed water |
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US5788826A (en) * | 1997-01-28 | 1998-08-04 | Pionetics Corporation | Electrochemically assisted ion exchange |
US5858199A (en) * | 1995-07-17 | 1999-01-12 | Apogee Corporation | Apparatus and method for electrocoriolysis the separation of ionic substances from liquids by electromigration and coriolis force |
US6251259B1 (en) * | 1997-08-27 | 2001-06-26 | Miz Co., Ltd. | Method and apparatus for producing electrolyzed water |
US20010053774A1 (en) * | 1994-04-25 | 2001-12-20 | Glaxo Wellcome Inc.. | Non-steroidal ligands for the estrogen receptor |
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JPS55129157A (en) * | 1979-03-29 | 1980-10-06 | Mitsubishi Chem Ind Ltd | Electrolytic regeneration method of ion exchange resin |
DE3027306A1 (en) * | 1980-07-18 | 1982-02-18 | Siemens AG, 1000 Berlin und 8000 München | METHOD FOR DETERMINING THE PH OF ION LOW WATER |
US4461693A (en) * | 1982-07-06 | 1984-07-24 | Ionics Incorporated | Polarity reversal electrodes |
JPS5970953A (en) * | 1982-10-16 | 1984-04-21 | Yamato Scient Co Ltd | Sensor for measuring electric conductivity |
JPS61247999A (en) * | 1985-04-26 | 1986-11-05 | 旭化成株式会社 | Improved ion exchange resin regeneration method |
JP3169831B2 (en) * | 1995-11-30 | 2001-05-28 | 株式会社荏原製作所 | Water anion detector |
US5762774A (en) * | 1996-12-20 | 1998-06-09 | Glegg Water Conditioning, Inc. | Apparatus for the purification of liquids and a method of manufacturing and of operating same |
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JP2000061322A (en) * | 1998-08-24 | 2000-02-29 | Kurita Water Ind Ltd | Apparatus for regenerating used ion exchange resin |
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2001
- 2001-08-10 JP JP2002519929A patent/JP2004506895A/en active Pending
- 2001-08-10 CN CN 01813324 patent/CN1444729A/en active Pending
- 2001-08-10 WO PCT/US2001/025264 patent/WO2002014850A1/en not_active Application Discontinuation
- 2001-08-10 EP EP01981302A patent/EP1322943A1/en not_active Withdrawn
- 2001-08-10 AU AU2002212957A patent/AU2002212957A1/en not_active Abandoned
Patent Citations (4)
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US20010053774A1 (en) * | 1994-04-25 | 2001-12-20 | Glaxo Wellcome Inc.. | Non-steroidal ligands for the estrogen receptor |
US5858199A (en) * | 1995-07-17 | 1999-01-12 | Apogee Corporation | Apparatus and method for electrocoriolysis the separation of ionic substances from liquids by electromigration and coriolis force |
US5788826A (en) * | 1997-01-28 | 1998-08-04 | Pionetics Corporation | Electrochemically assisted ion exchange |
US6251259B1 (en) * | 1997-08-27 | 2001-06-26 | Miz Co., Ltd. | Method and apparatus for producing electrolyzed water |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018036612A1 (en) * | 2016-08-23 | 2018-03-01 | Swan Analytische Instrumente Ag | Device and method for the electrodeionization of a liquid |
RU2729252C1 (en) * | 2016-08-23 | 2020-08-05 | Сван Аналитише Инструменте Аг | Device and method of liquid electrodeionisation |
US12043558B2 (en) | 2016-08-23 | 2024-07-23 | Swan Analytishce Instrumente AG | Device and method for the electrodeionization of a liquid |
RU201094U1 (en) * | 2019-06-28 | 2020-11-26 | Цзянсуская корпорация по ядерной энергетике | Device for continuous measurement of changes in the electrical conductivity of deionized water in a tank |
CN111233086A (en) * | 2020-03-16 | 2020-06-05 | 佛山市云米电器科技有限公司 | One-way anion exchange type water filtering and purifying system and method and water purifier |
CN114062622A (en) * | 2020-07-31 | 2022-02-18 | 力合科技(湖南)股份有限公司 | Sampling effectiveness monitoring method and intelligent sampling bottle |
CN113552178A (en) * | 2021-05-27 | 2021-10-26 | 华电电力科学研究院有限公司 | Automatic continuous measurement method for hydrogen conductivity in steam-water sampling |
CN113552178B (en) * | 2021-05-27 | 2023-08-04 | 华电电力科学研究院有限公司 | Automatic continuous measurement method for steam-water sampling hydrogen conductivity |
CN114428105A (en) * | 2021-12-16 | 2022-05-03 | 华能南京燃机发电有限公司 | Device and method for detecting multiple indexes of water vapor of gas turbine power station |
Also Published As
Publication number | Publication date |
---|---|
AU2002212957A1 (en) | 2002-02-25 |
WO2002014850A9 (en) | 2005-01-13 |
EP1322943A1 (en) | 2003-07-02 |
CN1444729A (en) | 2003-09-24 |
JP2004506895A (en) | 2004-03-04 |
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