WO2006009185A1 - シリカ除去装置及びシリカ除去方法 - Google Patents
シリカ除去装置及びシリカ除去方法 Download PDFInfo
- Publication number
- WO2006009185A1 WO2006009185A1 PCT/JP2005/013347 JP2005013347W WO2006009185A1 WO 2006009185 A1 WO2006009185 A1 WO 2006009185A1 JP 2005013347 W JP2005013347 W JP 2005013347W WO 2006009185 A1 WO2006009185 A1 WO 2006009185A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- silica
- water
- reverse osmosis
- osmosis membrane
- raw water
- Prior art date
Links
Classifications
-
- 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
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- 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
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
-
- 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
- C02F9/00—Multistage treatment of water, waste water or sewage
Definitions
- the present invention relates to a silica removing apparatus and a silica removing method. More specifically, the present invention uses a simple device to remove silica from the reverse osmosis membrane concentrated water to a saturation concentration or less, effectively preventing the generation of silica scale in the reverse osmosis membrane concentrated water loop, The present invention relates to a silica removing device and a silica removing method capable of collecting the entire raw water as reverse osmosis membrane permeated water.
- Reverse osmosis membranes are widely used as means for removing impurities in water to be treated in pure water production equipment.
- permeated water having a reduced impurity concentration is obtained, and the removed impurities are concentrated in the concentrated water.
- a pure water treatment device that treats permeate treated in two stages using two reverse osmosis membrane separators in series with an electrodialyzer has been proposed.
- An example is shown in which the osmosis membrane permeate water drops to 1.5 pm and the second reverse osmosis membrane permeate water decreases to 0.0 19 ppm (Patent Document 1).
- Silica removed from the raw water accumulates in the reverse osmosis membrane concentrated water, and when the concentration exceeds the saturation concentration, it deposits as a silica scale on piping in the reverse osmosis membrane concentrated water loop, causing various obstacles. .
- the silica is removed from the reverse osmosis membrane concentrated water to a saturation concentration or less using a simple apparatus having a different principle from that of crystallization, and the reverse osmosis membrane concentrated water loop is removed.
- an apparatus for removing silica from reverse osmosis membrane concentrated water which can effectively prevent the generation of silica scale in the tank.
- the present inventors have used silica-containing water as a silica-removing device capable of effectively removing silica from silica-containing water using a simple device and preventing the generation of silica scale in a cooling water system or boiler water system.
- a silica removal device having a column filled with silica gel particles having a water inlet and a treated water outlet (Patent Document 3).
- silica in silicic acid-containing water can be adsorbed and polymerized on the surface of silica gel particles to reduce the silica concentration in water and effectively prevent the generation of silica scale.
- Patent Document 1 Japanese Patent Laid-Open No. 2-4 0 2 2 0 (Page 2, Page 5, Figure 1)
- Patent Document 2 Japanese Patent Application Laid-Open No. 10-1 3 7 7 5 7 (Page 2, Page 4, Figure 1)
- Patent Document 3 Japanese Patent Laid-Open No. 2 0 0 1-1 4 9 9 5 2 (Page 2, Fig. 2) Disclosure of Invention
- the present invention uses a simple device to remove silica from the reverse osmosis membrane concentrated water to below the saturation concentration, effectively preventing the generation of silica scale in the reverse osmosis membrane concentrated water loop, and reducing the total amount of raw water.
- the object of the present invention is to provide a silica removing device and a scouring force removing method that can be recovered as reverse osmosis membrane permeated water.
- the present inventor adjusted the pH of raw water to the acidic side and supplied it to the reverse osmosis membrane device, while preventing the generation of silica scale.
- the inventors have found that silica in water can be efficiently removed by increasing the concentration factor in the reverse osmosis membrane device, and the present invention has been completed based on this finding. .
- a device that removes silica in water with a reverse osmosis membrane (A) Raw water tank, (B) Raw water pH adjusting means, (C) Reverse osmosis membrane device, (D) Reverse osmosis membrane concentrated water p H removal means, (E) Silica removal means filled with a porous silica-containing removal agent, and (F) Silica removal apparatus characterized by having means for returning the effluent water of the silica removal means to the raw water tank,
- Porous silica-containing remover is produced from silica gel, diatomaceous earth and volcanic glass.
- the silica removing device according to (1) comprising at least one selected from the group consisting of
- the average particle size of the porous silica-containing removal agent is 0.1 to 0.8 mm (1) or (2) the silica removal device according to
- the silica removal method characterized by passing water through the silica removal means filled with the porous silica-containing removal agent and returning the effluent water of the silica removal means to the raw water tank, and
- FIG. 1 is a process flow diagram of one embodiment of the silica removing apparatus of the present invention.
- reference numeral 1 is a raw water tank
- 2 is a pH adjusting means
- 3 is a reverse osmosis membrane device
- 4 is a pH adjusting means
- 5 is a silica removing means.
- the apparatus for removing scouring force of the present invention is an apparatus for removing silica in water with a reverse osmosis membrane.
- A Raw water tank
- B Raw water pH adjusting means
- C Reverse osmosis membrane device
- D Reverse osmosis membrane Concentrated water pH adjusting means
- E A silica removing means filled with a porous silica-containing removing agent
- F A means for returning the effluent of the silica removing means to the raw water tank.
- FIG. 1 is a process flow diagram of one embodiment of the silica removing apparatus of the present invention.
- the raw water stored in the raw water tank 1 is sent out, the pH adjusting means 2 is added to adjust the pH to the acidic side, and the reverse osmosis membrane apparatus 3 is used for reverse osmosis. Separation into permeated water and reverse osmosis membrane concentrated water.
- pH adjustment means 4 adds alkaline power to adjust pH to neutrality, and passes it through scouring force removal means 5 filled with a porous silica-containing removal agent. Water is used to deposit and remove the scouring force in the reverse osmosis membrane concentrated water, and the effluent from the silica removal means is returned to the raw water tank.
- the solubility of silica in water is higher on the alkaline side than on the acidic side, and therefore the alkaline side is considered to be more advantageous for scale prevention.
- Force according to the present invention, by adjusting the raw water to a predetermined pH, the concentration in the reverse osmosis membrane device can be increased and the silica in the water can be efficiently removed while suppressing the generation of scale.
- a decarboxylation tower can be provided before the reverse osmosis membrane apparatus to decarboxylate raw water
- a softening apparatus can be provided to soften the raw water.
- the softening device include an Na-type strongly acidic cation exchange resin packed tower and an H-type strongly acidic cation exchange resin packed tower. The pH of the raw water can be lowered by passing the raw water through the H-type cation exchange resin.
- the reverse osmosis membrane used in the device of the present invention is preferably an acid resistant membrane.
- the type of the reverse osmosis membrane device is not particularly limited, and examples thereof include a flat membrane module, a spiral module, a tubular module, and a hollow fiber module.
- the water supplied to the reverse osmosis membrane device was condensed with the reverse osmosis membrane permeated water from which impurities such as silica, sodium, potassium, chloride ion, sulfate ion and carbonate ion were removed, and these impurities were concentrated. Separated into reverse osmosis membrane concentrated water.
- the silica removing means is filled with a porous silica-containing remover.
- the porous silica-containing remover is preferably an amorphous porous silica-containing remover selected from the group consisting of silica gel, diatomaceous earth, and volcanic glass.
- silica gel used in the present invention device, and either natural silica gel or synthetic silica gel can be used.
- silica gel represented by the composition formula S i 0 2 ⁇ ⁇ ⁇ 2 ⁇ , ⁇ Silica-alumina gel containing A 1 2 0 3 , caustic anhydride called white carbon, hydrous caustic acid, etc. can also be used.
- Siri force gel chemically modified with hydrocarbon groups such as methyl group, butyl group, octyl group, octadecyl group, and phenyl group, an amino group, an aminopropyl group
- Silica gel chemically modified with ion exchange groups such as quaternary ammonium groups and sulfonic acid groups can also be used.
- Synthetic silica gel can be obtained by neutralizing an aqueous solution of sodium silicate with an inorganic acid, washing the precipitated precipitate with water, and drying, but use silica gel that is commercially available for drying. You can also.
- the porosity of silica gel is usually 40 to 60% by volume.
- diatomaceous earth used in the apparatus of the present invention.
- examples include refined products, calcined products obtained by firing natural diatomaceous earth, and purified products obtained by treating natural diatomaceous earth with dilute hydrochloric acid and then washing with water.
- Diatomaceous earth contains sio 2
- the volcanic glass used in the apparatus of the present invention is a glassy aluminosilicate such as pearlite, obsidian, rosinite, rhyolite, nevadaite, and lysoid.
- the volcanic glass has an S i 0 2 content of 70 to 76% by weight.
- mold or spherical shape can be used suitably.
- the destructive removal agent can be obtained, for example, by crushing volcanic glass.
- the removal agent formed into a spherical shape can be formed into a spherical shape during the production process of silica gel, or diatomaceous earth can be formed into a spherical shape.
- the silica removing means filled with the porous silica-containing removal agent is a fluidized bed type upward flow device in which the removal agent flows, a fixed bed type downward flow device or a fixed bed type in which the column is filled with the removal agent. Any of the upward flow devices can be used.
- the average particle diameter of the porous silica-containing removal agent used in the apparatus of the present invention is preferably 0.1 to 0.8 mm, and more preferably 0.2 to 0.6 mm.
- the average particle size is a particle size corresponding to 50% by volume in a cumulative distribution curve in which the horizontal axis is the particle size and the vertical axis is the cumulative relative particle amount (volume basis).
- the particle size of the non-spherical removal agent is determined as the particle size of the spherical removal agent having the same volume.
- the fluidized bed type upward flow silica removal means has a moderately large sedimentation speed and good silica removal performance. The speed can be increased to reduce the size of the device.
- the fixed bed type silica removal means has low filtration resistance and good silica removal performance, so the water flow rate is increased. Thus, the apparatus can be reduced in size.
- the fixed bed type silica removing means it is more preferable to use a spherical removing agent because the filtration resistance is small.
- a plurality of silica removing means can be provided in series in multiple stages.
- the silica removing means filled with the silica-containing removing agent arranged in series in a plurality of stages is preferably operated by a memory go round method.
- the silica concentration at the outlet of the first silica removal means is measured and the silica removal performance is lost.
- remove the first-stage silica removal means from the system by switching the valve, etc. replace the filled porous silica-containing removal agent with a new one, and then switch the valve so that it becomes the last-stage silica removal means Can do.
- the capacity of the porous silica-containing removal agent is fully utilized to reduce the processing cost, the removal agent replacement frequency is reduced, the work efficiency is improved, and the silica removal performance is improved. A stable and constant silica removal rate can be maintained.
- the silica removal performance of the porous silica-containing removal agent decreases as the period of use increases, in order to obtain the desired silica removal rate, even if the silica removal performance remains, the removal rate decreases. It was necessary to replace it with a new one.
- the replacement timing of the silica removing means can be judged by measuring the silica concentration at the outlet of the front-stage silicic force removing means, or after treating a certain amount of water flow.
- the silica removing means can be a silica removing means capable of switching water flow between an upward flow and a downward flow. By switching the water flow direction, it is possible to prevent an increase in pressure loss due to dirt accumulated on the top of the force ram.
- the switching timing of the water flow direction can be controlled by a differential pressure gauge, or it can be controlled by a timer.
- the porous silica-containing removal agent is preferably filled in the silica removal means after being immersed in neutral or acidic water.
- the pH of neutral or acidic water is preferably 1 to 7, and more preferably 2 to 5.
- the silica removal means is filled with the removal agent containing porous silica in the dry state, dust is generated during the filling operation, the temperature rises due to heat of hydration immediately after passing water, contains porous silica It takes time for the bubbles in the pores of the remover to escape, and problems such as a low silica removal rate immediately after filling occur.
- a high silica removal rate can be obtained for reasons such as suppressing surface deterioration and deterioration.
- crystalline silica such as quartz is used as a seed crystal to contact water.
- the silica adsorbs on the surface of the seed crystal at normal temperature and pressure, but the crystal does not grow and the silica removal effect is not sufficient.
- the porous silica-containing removal agent used in the apparatus of the present invention is amorphous, has a large porosity, and silica contained in the reverse osmosis membrane concentrated water is taken into the pores in the removal agent, and between the silanol groups. Since it is deposited on the surface of the pores by the polymerization reaction, the volume of the removal agent will hardly change even if a large amount of silica is deposited. Therefore, the porous silica-containing removal agent can be packed in the column, and the operation can be continued stably in the downward flow.
- the pH of the raw water is adjusted to 2-7, preferably 3-6, more preferably 5.0-5.5, and the raw water is supplied to the reverse osmosis membrane device and supplied to the reverse osmosis membrane permeated water. And reverse osmosis membrane Separate into concentrated water. By doing so, it is possible to efficiently remove silica in the water by suppressing the generation of scale and increasing the concentration factor in the reverse osmosis membrane device. If the pH of the raw water is less than 2, the reverse osmosis membrane may deteriorate. When the pH of raw water exceeds 7, precipitation of silica scale becomes a problem.
- the pH of the reverse osmosis membrane concentrated water is adjusted to 6.5-9, more preferably 7-8, and then it is passed through a silica removing means filled with a porous silica-containing removing agent. If the pH of the reverse osmosis membrane concentrated water is less than 6.5, dissociation of the surface of the porous silica-containing removal agent becomes small, and the silica adsorption force may be reduced. Reverse osmosis membrane If the pH of the concentrated water exceeds 9, the saturation solubility of silica increases, and the silica removal performance may decrease. Adjusting the pH of the reverse osmosis membrane concentrated water to 9.3 actually decreases the silica removal performance.
- the silica deposition rate is increased, and in the silica removal means, silica force is deposited on the surface of the porous silica-containing removal agent, and the silica concentration of the reverse osmosis membrane concentrated water is reduced. It can be effectively reduced.
- Siri force in the raw water containing silica is adjusted by adjusting the pH of the raw water to the 10 to 12 altitude side, passing through the reverse osmosis membrane, reverse osmosis membrane concentrated water and reverse osmosis membrane permeate water. It can also be removed by separating them.
- it is essential to install a decarboxylation tower and a softening device in front of the reverse osmosis membrane device, whereas the pH of the raw water is set to the acidic side. In the case of adjustment, the decarboxylation tower and the softening device can be omitted.
- the effluent water from the silica removing means is returned to the raw water tank and circulated together with the replenished raw water to remove the contained silica.
- the silica contained in the raw water is all deposited in the surface of the porous silica-containing removal agent in the silica removal means, except for a very small amount of silica contained in the reverse osmosis membrane permeate and moving out of the system. Therefore, all raw water can be converted to reverse osmosis membrane permeated water without discarding the reverse osmosis membrane concentrated water as professional water.
- This equipment consists of a raw water tank 1 with a capacity of 2 Om 3 , pH adjustment means 2 to adjust the pH to 5.0 by adding hydrochloric acid to the raw water as a pH adjuster, reverse osmosis membrane equipment [Kurita Industrial Co., Ltd., KROA- 2023] 3.
- Calcium chloride, sodium bicarbonate and sodium silicate 3 are dissolved in activated carbon treated tap water, calcium hardness 2 OmgCaC0 3 ZL, M alkalinity 20 mg CaC0 3 / L, silica concentration 5 OmgSi0 2 / L, Synthetic water with pH 7.0 was prepared and used as raw water.
- Sodium hydroxide aqueous solution was added to the permeable membrane and adjusted to pH 7.0, and the silica removal column was fed upward with SV (Space Velocity) 2 h- 1 .
- the porous silica-containing remover in the column remained in a fixed bed state.
- the silica concentration of water flowing out from the silica removal column was 10 O mg Si0 2 ZL. All water flowing out from the silica removal column was returned to the raw water tank. The resulting raw water supply was 6. O m 3 Zh.
- the silica concentration of the reverse osmosis membrane permeated water and the silica concentration of the silica removal column effluent remain constant, and the total amount of raw water is reversed without discharging the reverse osmosis concentrated water out of the system. It could be recovered as osmotic membrane permeated water.
- silica is removed from the reverse osmosis membrane concentrated water to a saturation concentration or less, effectively preventing the generation of silica scale in the reverse osmosis membrane concentrated water loop, and the reverse osmosis membrane concentration.
- the entire amount of raw water can be converted to reverse osmosis membrane permeate without discharging water out of the system.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2007000393A MX2007000393A (es) | 2004-07-16 | 2005-07-13 | Aparato para extraer silice y proceso de extraccion del mismo. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004209578A JP2006026543A (ja) | 2004-07-16 | 2004-07-16 | シリカ除去装置及びシリカ除去方法 |
JP2004-209578 | 2004-07-16 |
Publications (1)
Publication Number | Publication Date |
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WO2006009185A1 true WO2006009185A1 (ja) | 2006-01-26 |
Family
ID=35785292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/013347 WO2006009185A1 (ja) | 2004-07-16 | 2005-07-13 | シリカ除去装置及びシリカ除去方法 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP2006026543A (ja) |
MX (1) | MX2007000393A (ja) |
TW (1) | TWI381999B (ja) |
WO (1) | WO2006009185A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7876995B2 (en) | 2008-10-29 | 2011-01-25 | Commscope, Inc. Of North Carolina | Telecommunications patching systems with obliquely-angled patching modules |
US20180194659A1 (en) * | 2015-07-09 | 2018-07-12 | Kurita Water Industries Ltd. | Recovery method and recovery device for discharged cooling water |
WO2019036787A1 (pt) * | 2017-08-22 | 2019-02-28 | Allflow Equipamentos Industriais E Comercio Ltda. | Sistema de reaproveitamento de águas de rejeito oriundas de processo de filtragem por osmose reversa e método para o tratamento de águas de rejeito |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101734777B (zh) * | 2008-11-24 | 2011-11-02 | 财团法人工业技术研究院 | 降低水中二氧化硅的方法 |
JP5440199B2 (ja) * | 2010-01-19 | 2014-03-12 | 栗田工業株式会社 | シリコンウエハエッチング排水の処理方法及び処理装置 |
JP2017119256A (ja) * | 2015-12-28 | 2017-07-06 | 日本国土開発株式会社 | シリカ吸着剤およびその製造方法 |
JP7149129B2 (ja) * | 2018-08-03 | 2022-10-06 | オルガノ株式会社 | シリカ含有水の処理方法および処理装置 |
Citations (7)
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JPH11244853A (ja) * | 1998-03-06 | 1999-09-14 | Kurita Water Ind Ltd | 純水の製造方法 |
JP2000015257A (ja) * | 1998-07-06 | 2000-01-18 | Kurita Water Ind Ltd | 高純度水の製造装置および方法 |
JP2002018437A (ja) * | 2000-05-02 | 2002-01-22 | Kurita Water Ind Ltd | カルシウム及びシリカ含有水の処理方法及び処理装置 |
JP2003001255A (ja) * | 2001-06-25 | 2003-01-07 | Kurita Water Ind Ltd | 循環冷却水の処理方法 |
JP2003326259A (ja) * | 2002-05-14 | 2003-11-18 | Toray Ind Inc | 造水方法および造水装置 |
JP2004025027A (ja) * | 2002-06-25 | 2004-01-29 | Kurita Water Ind Ltd | 逆浸透膜を用いた水処理方法 |
JP2004230256A (ja) * | 2003-01-29 | 2004-08-19 | Kurita Water Ind Ltd | 逆浸透膜濃縮水のシリカ除去装置 |
Family Cites Families (2)
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JPH09248571A (ja) * | 1996-03-18 | 1997-09-22 | Ngk Insulators Ltd | 純水製造装置 |
JP3703000B2 (ja) * | 1999-11-25 | 2005-10-05 | 栗田工業株式会社 | 開放循環冷却水中のシリカを除去する方法 |
-
2004
- 2004-07-16 JP JP2004209578A patent/JP2006026543A/ja active Pending
-
2005
- 2005-03-31 TW TW094110195A patent/TWI381999B/zh not_active IP Right Cessation
- 2005-07-13 MX MX2007000393A patent/MX2007000393A/es active IP Right Grant
- 2005-07-13 WO PCT/JP2005/013347 patent/WO2006009185A1/ja active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH11244853A (ja) * | 1998-03-06 | 1999-09-14 | Kurita Water Ind Ltd | 純水の製造方法 |
JP2000015257A (ja) * | 1998-07-06 | 2000-01-18 | Kurita Water Ind Ltd | 高純度水の製造装置および方法 |
JP2002018437A (ja) * | 2000-05-02 | 2002-01-22 | Kurita Water Ind Ltd | カルシウム及びシリカ含有水の処理方法及び処理装置 |
JP2003001255A (ja) * | 2001-06-25 | 2003-01-07 | Kurita Water Ind Ltd | 循環冷却水の処理方法 |
JP2003326259A (ja) * | 2002-05-14 | 2003-11-18 | Toray Ind Inc | 造水方法および造水装置 |
JP2004025027A (ja) * | 2002-06-25 | 2004-01-29 | Kurita Water Ind Ltd | 逆浸透膜を用いた水処理方法 |
JP2004230256A (ja) * | 2003-01-29 | 2004-08-19 | Kurita Water Ind Ltd | 逆浸透膜濃縮水のシリカ除去装置 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7876995B2 (en) | 2008-10-29 | 2011-01-25 | Commscope, Inc. Of North Carolina | Telecommunications patching systems with obliquely-angled patching modules |
US20180194659A1 (en) * | 2015-07-09 | 2018-07-12 | Kurita Water Industries Ltd. | Recovery method and recovery device for discharged cooling water |
US11130694B2 (en) * | 2015-07-09 | 2021-09-28 | Kurita Water Industries Ltd. | Recovery method for discharged cooling water |
WO2019036787A1 (pt) * | 2017-08-22 | 2019-02-28 | Allflow Equipamentos Industriais E Comercio Ltda. | Sistema de reaproveitamento de águas de rejeito oriundas de processo de filtragem por osmose reversa e método para o tratamento de águas de rejeito |
US11242269B2 (en) | 2017-08-22 | 2022-02-08 | Allflow Equipamentos Industriais E Comercio Ltda. | System for recycling wastewater from reverse osmosis filtering processes and method for treating wastewater |
Also Published As
Publication number | Publication date |
---|---|
JP2006026543A (ja) | 2006-02-02 |
TWI381999B (zh) | 2013-01-11 |
MX2007000393A (es) | 2007-03-07 |
TW200604108A (en) | 2006-02-01 |
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