JP2018122210A - 電気伝導度によるpH制御方法 - Google Patents
電気伝導度によるpH制御方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000003513 alkali Substances 0.000 claims abstract description 33
- 239000002253 acid Substances 0.000 claims abstract description 23
- 238000006114 decarboxylation reaction Methods 0.000 claims abstract description 15
- 239000008235 industrial water Substances 0.000 claims abstract description 9
- 230000007935 neutral effect Effects 0.000 claims abstract description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000003673 groundwater Substances 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 14
- 230000009471 action Effects 0.000 abstract description 2
- 239000000654 additive Substances 0.000 abstract 3
- 230000000996 additive effect Effects 0.000 abstract 3
- 230000001537 neural effect Effects 0.000 abstract 1
- 239000006174 pH buffer Substances 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 29
- 238000001223 reverse osmosis Methods 0.000 description 29
- 239000012528 membrane Substances 0.000 description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 230000003139 buffering effect Effects 0.000 description 6
- 238000007872 degassing Methods 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 230000003068 static effect Effects 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 238000010979 pH adjustment Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004043 responsiveness Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000000911 decarboxylating effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Images
Classifications
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- 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
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- 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
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- 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
Abstract
【解決手段】脱炭酸処理水にアルカリ又は酸を添加してpHを中性領域(pH6〜8)に制御する方法において、電気伝導度計を利用してアルカリ又は酸添加量を制御するpH制御方法。脱炭酸処理水は、工業用水又は地下水を炭酸濃度が10ppm以下となるように脱炭酸処理した水などである。
【選択図】図1
Description
この場合、脱炭酸水のΔEC/ΔpHを実験的に求めておくことが好ましい。
表2に示す性状の工業用水1〜4にそれぞれ硫酸を添加してpH5に調整後、膜脱気装置で脱炭酸(残留IC=2.5mg−C/L)した水の性状を表3に示す。
4 アルカリ添加手段
5 スタティックミキサ
8,9 RO装置
電気伝導度EC 2 =電気伝導度EC 1 +(ΔEC/ΔpH)[mS・m]×(目標pH−脱炭酸水pH)
Claims (5)
- 脱炭酸処理水にアルカリ又は酸を添加してpHを中性領域に制御する方法において、電気伝導度計を利用してアルカリ又は酸添加量を制御することを特徴とするpH制御方法。
- 請求項1において、脱炭酸処理水は、工業用水又は地下水を炭酸濃度が10ppm以下となるように脱炭酸処理した水であることを特徴とするpH制御方法。
- 請求項1又は2において、前記pH制御によりpH6〜8とされた脱炭酸水をRO処理して純水を製造する工程をさらに有することを特徴とするpH制御方法。
- 請求項1ないし3のいずれか1項において、脱炭酸処理水のpH及び電気伝導度EC1を測定する工程と、アルカリ又は酸添加後の水の電気伝導度EC2を次式に従って演算する工程と、
アルカリ又は酸添加後の電気伝導度が演算されたEC2となるようにアルカリ又は酸を添加する工程とを有することを特徴とするpH制御方法。
電気伝導度EC2=電気伝導度EC1+(ΔEC/ΔpH)[mS・m]×(目標pH−脱炭酸水pH) - 請求項4において、前記脱炭酸水のΔEC/ΔpHを実験的に求めておくことを特徴とするpH制御方法。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017014354A JP6269866B1 (ja) | 2017-01-30 | 2017-01-30 | 電気伝導度によるpH制御方法 |
PCT/JP2017/033543 WO2018138957A1 (ja) | 2017-01-30 | 2017-09-15 | 電気伝導度によるpH制御方法 |
SG11201906340UA SG11201906340UA (en) | 2017-01-30 | 2017-09-15 | Method for controlling ph by electrical conductivity |
CN201780083097.9A CN110177764B (zh) | 2017-01-30 | 2017-09-15 | 基于电导率的pH控制方法 |
KR1020197011069A KR102449026B1 (ko) | 2017-01-30 | 2017-09-15 | 전기 전도도에 의한 pH 제어 방법 |
US16/476,731 US11130688B2 (en) | 2017-01-30 | 2017-09-15 | Method for controlling pH by electrical conductivity |
TW106132883A TWI761373B (zh) | 2017-01-30 | 2017-09-26 | 憑藉電性傳導度之pH控制方法 |
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JP2017014354A JP6269866B1 (ja) | 2017-01-30 | 2017-01-30 | 電気伝導度によるpH制御方法 |
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JP6269866B1 JP6269866B1 (ja) | 2018-01-31 |
JP2018122210A true JP2018122210A (ja) | 2018-08-09 |
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Country | Link |
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US (1) | US11130688B2 (ja) |
JP (1) | JP6269866B1 (ja) |
KR (1) | KR102449026B1 (ja) |
CN (1) | CN110177764B (ja) |
SG (1) | SG11201906340UA (ja) |
TW (1) | TWI761373B (ja) |
WO (1) | WO2018138957A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021020163A (ja) * | 2019-07-27 | 2021-02-18 | 三菱マテリアル株式会社 | 鉛含有坑外水の処理方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113105051A (zh) * | 2021-03-31 | 2021-07-13 | 江苏瑞达环保科技有限公司 | 一种基于电导率变化控制蒸氨过程液碱加量的方法 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH05269464A (ja) * | 1992-03-24 | 1993-10-19 | Kurita Water Ind Ltd | 膜分離装置 |
JPH0957261A (ja) * | 1995-08-30 | 1997-03-04 | Japan Organo Co Ltd | 2段式逆浸透膜処理方法 |
JPH09314129A (ja) * | 1996-05-31 | 1997-12-09 | Kurita Water Ind Ltd | 脱炭酸装置 |
JPH10202259A (ja) * | 1997-01-27 | 1998-08-04 | Kurita Water Ind Ltd | 純水の製造方法 |
JP2002349804A (ja) * | 2001-05-29 | 2002-12-04 | Mitsubishi Heavy Ind Ltd | ボイラの給水管理装置、ボイラの給水制御方法およびボイラの給水管理方法 |
JP2004167423A (ja) * | 2002-11-21 | 2004-06-17 | Kurita Water Ind Ltd | 純水製造装置及び純水製造方法 |
JP2005177564A (ja) * | 2003-12-17 | 2005-07-07 | Nomura Micro Sci Co Ltd | 超純水の製造方法及び装置 |
JP2007268352A (ja) * | 2006-03-30 | 2007-10-18 | Matsushita Electric Ind Co Ltd | 水処理方法および水処理装置 |
JP2007268397A (ja) * | 2006-03-31 | 2007-10-18 | Kurita Water Ind Ltd | 純水給水ボイラ水系処理方法および処理装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS58131193A (ja) | 1982-01-30 | 1983-08-04 | Nikkiso Co Ltd | ヒドラジン注入によるボイラの給復水pH制御方法 |
JPS6354438A (ja) | 1986-08-26 | 1988-03-08 | Agency Of Ind Science & Technol | ジアセチレン基含有ポリイミド成形体 |
US6258278B1 (en) * | 1997-03-03 | 2001-07-10 | Zenon Environmental, Inc. | High purity water production |
-
2017
- 2017-01-30 JP JP2017014354A patent/JP6269866B1/ja active Active
- 2017-09-15 US US16/476,731 patent/US11130688B2/en active Active
- 2017-09-15 SG SG11201906340UA patent/SG11201906340UA/en unknown
- 2017-09-15 WO PCT/JP2017/033543 patent/WO2018138957A1/ja active Application Filing
- 2017-09-15 KR KR1020197011069A patent/KR102449026B1/ko active IP Right Grant
- 2017-09-15 CN CN201780083097.9A patent/CN110177764B/zh active Active
- 2017-09-26 TW TW106132883A patent/TWI761373B/zh active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05269464A (ja) * | 1992-03-24 | 1993-10-19 | Kurita Water Ind Ltd | 膜分離装置 |
JPH0957261A (ja) * | 1995-08-30 | 1997-03-04 | Japan Organo Co Ltd | 2段式逆浸透膜処理方法 |
JPH09314129A (ja) * | 1996-05-31 | 1997-12-09 | Kurita Water Ind Ltd | 脱炭酸装置 |
JPH10202259A (ja) * | 1997-01-27 | 1998-08-04 | Kurita Water Ind Ltd | 純水の製造方法 |
JP2002349804A (ja) * | 2001-05-29 | 2002-12-04 | Mitsubishi Heavy Ind Ltd | ボイラの給水管理装置、ボイラの給水制御方法およびボイラの給水管理方法 |
JP2004167423A (ja) * | 2002-11-21 | 2004-06-17 | Kurita Water Ind Ltd | 純水製造装置及び純水製造方法 |
JP2005177564A (ja) * | 2003-12-17 | 2005-07-07 | Nomura Micro Sci Co Ltd | 超純水の製造方法及び装置 |
JP2007268352A (ja) * | 2006-03-30 | 2007-10-18 | Matsushita Electric Ind Co Ltd | 水処理方法および水処理装置 |
JP2007268397A (ja) * | 2006-03-31 | 2007-10-18 | Kurita Water Ind Ltd | 純水給水ボイラ水系処理方法および処理装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021020163A (ja) * | 2019-07-27 | 2021-02-18 | 三菱マテリアル株式会社 | 鉛含有坑外水の処理方法 |
JP7259619B2 (ja) | 2019-07-27 | 2023-04-18 | 三菱マテリアル株式会社 | 鉛含有坑外水の処理方法 |
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US11130688B2 (en) | 2021-09-28 |
SG11201906340UA (en) | 2019-08-27 |
JP6269866B1 (ja) | 2018-01-31 |
CN110177764B (zh) | 2022-03-29 |
TW201827354A (zh) | 2018-08-01 |
WO2018138957A1 (ja) | 2018-08-02 |
TWI761373B (zh) | 2022-04-21 |
KR20190106987A (ko) | 2019-09-18 |
CN110177764A (zh) | 2019-08-27 |
KR102449026B1 (ko) | 2022-09-28 |
US20190359508A1 (en) | 2019-11-28 |
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