SG11201906340UA - Method for controlling ph by electrical conductivity - Google Patents

Method for controlling ph by electrical conductivity

Info

Publication number
SG11201906340UA
SG11201906340UA SG11201906340UA SG11201906340UA SG11201906340UA SG 11201906340U A SG11201906340U A SG 11201906340UA SG 11201906340U A SG11201906340U A SG 11201906340UA SG 11201906340U A SG11201906340U A SG 11201906340UA SG 11201906340U A SG11201906340U A SG 11201906340UA
Authority
SG
Singapore
Prior art keywords
water
controlling
electrical conductivity
decarbonated
alkali
Prior art date
Application number
SG11201906340UA
Inventor
Mamoru Iwasaki
Nozomu Ikuno
Original Assignee
Kurita Water Ind Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kurita Water Ind Ltd filed Critical Kurita Water Ind Ltd
Publication of SG11201906340UA publication Critical patent/SG11201906340UA/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0031—Degasification of liquids by filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0068—General arrangements, e.g. flowsheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/02—Foam dispersion or prevention
    • B01D19/04—Foam dispersion or prevention by addition of chemical substances
    • B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/025—Reverse osmosis; Hyperfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/025—Reverse osmosis; Hyperfiltration
    • B01D61/026—Reverse osmosis; Hyperfiltration comprising multiple reverse osmosis steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/04—Feed pretreatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/12—Controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/04—Specific process operations in the feed stream; Feed pretreatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/12—Addition of chemical agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/18—Details relating to membrane separation process operations and control pH control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/26—Further operations combined with membrane separation processes
    • B01D2311/2653—Degassing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2317/00—Membrane module arrangements within a plant or an apparatus
    • B01D2317/02—Elements in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2317/00—Membrane module arrangements within a plant or an apparatus
    • B01D2317/06—Use of membrane modules of the same kind
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06—Contaminated groundwater or leachate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/05—Conductivity or salinity
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nanotechnology (AREA)
  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Dispersion Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Physical Water Treatments (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

Provided is a method for controlling pH to a neutral region (pH 6-8) by adding an alkali or acid to decarbonated water, wherein the addition amount of the alkali or acid is controlled by using an electrical conductivity meter. The decarbonated water is obtained by decarbonating industrial water or underground water to have a carbonate concentration of 10 ppm or less. The method may further comprise a step for RO-treating the decarbonated water, which has been adjusted to pH 6-8 by the pH control, to produce pure water.
SG11201906340UA 2017-01-30 2017-09-15 Method for controlling ph by electrical conductivity SG11201906340UA (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017014354A JP6269866B1 (en) 2017-01-30 2017-01-30 PH control method by electric conductivity
PCT/JP2017/033543 WO2018138957A1 (en) 2017-01-30 2017-09-15 Method for controlling ph by electrical conductivity

Publications (1)

Publication Number Publication Date
SG11201906340UA true SG11201906340UA (en) 2019-08-27

Family

ID=61074681

Family Applications (1)

Application Number Title Priority Date Filing Date
SG11201906340UA SG11201906340UA (en) 2017-01-30 2017-09-15 Method for controlling ph by electrical conductivity

Country Status (7)

Country Link
US (1) US11130688B2 (en)
JP (1) JP6269866B1 (en)
KR (1) KR102449026B1 (en)
CN (1) CN110177764B (en)
SG (1) SG11201906340UA (en)
TW (1) TWI761373B (en)
WO (1) WO2018138957A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7259619B2 (en) * 2019-07-27 2023-04-18 三菱マテリアル株式会社 Method for treating lead-containing outside water
CN113105051A (en) * 2021-03-31 2021-07-13 江苏瑞达环保科技有限公司 Method for controlling liquid caustic soda addition in ammonia distillation process based on conductivity change

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58131193A (en) 1982-01-30 1983-08-04 Nikkiso Co Ltd Boiler supply and condensate pH control method using hydrazine injection
JPS6354438A (en) 1986-08-26 1988-03-08 Agency Of Ind Science & Technol Molding of diacetylene group-containing polyimide
JP3227765B2 (en) * 1992-03-24 2001-11-12 栗田工業株式会社 Membrane separation device
JPH0957261A (en) * 1995-08-30 1997-03-04 Japan Organo Co Ltd Two-stage type reverse osmosis membrane treatment
JP3244000B2 (en) * 1996-05-31 2002-01-07 栗田工業株式会社 Decarbonation equipment
JP3690032B2 (en) * 1997-01-27 2005-08-31 栗田工業株式会社 Pure water production method
US6258278B1 (en) * 1997-03-03 2001-07-10 Zenon Environmental, Inc. High purity water production
JP2002349804A (en) * 2001-05-29 2002-12-04 Mitsubishi Heavy Ind Ltd Water supply management device for boiler, water supply control method for boiler and water supply management method for boiler
JP2004167423A (en) * 2002-11-21 2004-06-17 Kurita Water Ind Ltd Pure water production apparatus and pure water production method
JP2005177564A (en) * 2003-12-17 2005-07-07 Nomura Micro Sci Co Ltd Ultrapure water production method and apparatus
JP2007268352A (en) * 2006-03-30 2007-10-18 Matsushita Electric Ind Co Ltd Water treatment method and water treatment apparatus
JP4983069B2 (en) * 2006-03-31 2012-07-25 栗田工業株式会社 Pure water supply boiler water system treatment method and treatment apparatus

Also Published As

Publication number Publication date
TWI761373B (en) 2022-04-21
CN110177764A (en) 2019-08-27
JP2018122210A (en) 2018-08-09
JP6269866B1 (en) 2018-01-31
WO2018138957A1 (en) 2018-08-02
US20190359508A1 (en) 2019-11-28
KR102449026B1 (en) 2022-09-28
TW201827354A (en) 2018-08-01
CN110177764B (en) 2022-03-29
US11130688B2 (en) 2021-09-28
KR20190106987A (en) 2019-09-18

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