WO2004107354A1 - 復水脱塩方法及び装置 - Google Patents
復水脱塩方法及び装置 Download PDFInfo
- Publication number
- WO2004107354A1 WO2004107354A1 PCT/JP2004/007163 JP2004007163W WO2004107354A1 WO 2004107354 A1 WO2004107354 A1 WO 2004107354A1 JP 2004007163 W JP2004007163 W JP 2004007163W WO 2004107354 A1 WO2004107354 A1 WO 2004107354A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin
- particle size
- condensate
- type
- desalination
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
- G21F9/12—Processing by absorption; by adsorption; by ion-exchange
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J47/00—Ion-exchange processes in general; Apparatus therefor
- B01J47/02—Column or bed processes
- B01J47/04—Mixed-bed processes
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/427—Treatment of water, waste water, or sewage by ion-exchange using mixed beds
Definitions
- the present invention relates to a method (apparatus for desalination) and an apparatus for condensing water in a nuclear power plant, and to provide a high-purity treated water having a low concentration of sulfate ions derived from organic impurities eluted from thiothion resin.
- An object of the present invention is to provide a condensate and desalination method and apparatus which can be obtained stably over a period.
- a nuclear power plant After a turbine is turned by steam generated by a nuclear reactor or a steam generator to generate power, the steam is cooled by seawater, and condensed water (condensate) obtained is ionized.
- the water is processed by a condensate desalination unit using exchange resin and circulated and supplied to a nuclear reactor or a steam generator.
- the condensate desalination unit uses an ion exchange resin to remove seawater components flowing into the system, suspended corrosion products mainly composed of iron oxides generated from plant constituent materials, and ionic impurities. ing.
- An anion exchange resin and a cation exchange resin are used in combination in the condensate desalination apparatus. Usually, a combination of a gel type cationic resin and a gel type anion resin or a porous type cationic resin is used. And a combination with a porous anion resin.
- the former has a drawback of low anti-osmotic pressure, and the latter has a drawback of low wear resistance.
- the condensate desalination equipment of plants that frequently perform backwash regeneration is used, and gel-type resins are used.
- porous plants are used in plants that frequently perform chemical regeneration. Mold resin is usually used.
- the porous resin is transported between a desalination tower and a regeneration tower, which have low abrasion resistance, the surface of the resin may be damaged or the resin particles may be damaged due to contact between the resins or between the resin and the metal material of the piping. Is crushed.
- the porous resin has a denser resin matrix structure than the gel resin, The diffusion rate of ions into the pores of the resin during adsorption of the resin and the diffusion rate of the ions adsorbed on the resin into the washing water during regenerating the drug are lower than the gel-type resin in terms of reaction rate and regeneration efficiency. Poor performance. Therefore, when using a porous resin in a condensate desalination apparatus, it is necessary to design the apparatus in consideration of the characteristics of the porous resin, such as increasing the regeneration level (consumption of chemicals).
- the ion exchange resin used in the condensate desalination unit of a nuclear power plant has a high ability to remove ionic components such as seawater components typified by NaCl flowing in from the upstream side.
- the toxic impurities hereinafter referred to as TOC
- TOC toxic impurities
- Patent Document 1 A method of applying a strongly acidic gel-type cationic resin having a crosslinking degree of 12 to 16% higher than 8 to 10% (Patent Document 1) is known.
- Patent Document 2 A method of adsorbing TOC eluted from a cationic resin by disposing it in the lower layer (Patent Document 2), a method of forming a mixed bed of a strongly acidic gel type cationic resin and a porous type anion resin having a Gaussian particle size distribution (Patent Reference 3) has been proposed.
- Patent Document 1 Japanese Patent Application Laid-Open No. 11-352283
- Patent Document 2 Japanese Patent Application Laid-Open No. 2001-314855
- Patent Document 3 JP-A-8-224579
- porous anion resin has high adsorption capacity for organic impurities due to its macropores, but IRA900 manufactured by Onoregano Co., Ltd. and Mitsubishi Chemical Co., Ltd., which are usually used in condensate desalination equipment in nuclear power plants.
- Porous anion resin such as PA312 has a so-called Gaussian distribution with a particle size distribution of 420-1180 xm and an average particle size of about 800 zm.
- the resin matrix portion has a very dense structure, and is inferior to the gel-type resin in the reaction speed.
- the present invention provides a high-purity treated water having a low concentration of sulfate ions generated from organic impurities eluted from a cationic resin in a condensate treatment by a condensate desalination apparatus of a nuclear power plant.
- the inventors of the present invention have examined the characteristics of the porous resin and the gel resin described above, and as a result, have found that a strongly acidic gel-type cation exchange resin can be exchanged with a strongly basic porous anion-exchange resin having a uniform particle size.
- the present inventors have found that the use of a resin in combination can improve the quality of treated water in the condensate and desalination treatment of a nuclear power plant, and have completed the present invention. That is, the present invention provides the following means.
- Anion resin having an average particle size of 500-1000 / im and having a particle size distribution such that the resin particle abundance in an average particle size range of ⁇ 100 / im is 95% or more.
- the condensate desalination unit described in paragraph 1 or 2 above will A condensate desalination method, which comprises subjecting condensate to desalination.
- FIG. 1 is a schematic flow chart of a boiling water (BWR) nuclear power plant.
- FIG. 2 is a flowchart showing a configuration of a condensate desalination apparatus.
- FIG. 3 is a graph showing experimental results of Example 2.
- Fig. 1 shows a schematic flow of a boiling water (BWR) nuclear power plant as an example of a nuclear power plant.
- BWR boiling water
- Steam is generated in the nuclear reactor 1, and the steam is sent to the steam turbine 2, and the turbine 2 is rotated to generate electric power.
- the steam discharged from the turbine 2 is sent to a condenser 3 where the steam is condensed by cooling water 4 and returned to water.
- the condensed water obtained is purified by a condensate filter 5 and a condensate desalination device 6, which are purification equipment, and circulated and supplied to the reactor 1 through a return pipe 7.
- the structure of a pressurized water nuclear power plant is similar to that of a BWR nuclear power plant.Steam is generated by a steam generator, turbines are used to generate power, and then condensed by a condenser to form water. Return, purify with a filtration device and a condensate desalination device, and circulate and supply water to the steam generator.
- the condensate desalination apparatus 6 used in the condensate circulation system as shown in Fig. 1 has an apparatus configuration as shown in Fig. 2. That is, the condensate desalination apparatus is composed of 3 to 10 ion exchange resin towers 21. Usually, condensate at a flow rate of 2000 to 7000 m 3 / h is treated in these ion exchange resin towers 21. Part of the treated water is recirculated to the ion exchange resin tower 21 through the return pipe 24, and the remainder is discharged through the treated water pipe 25.
- reference numeral 23 denotes a circulating water pump
- reference numeral 22 denotes a resin strainer for trapping resin flowing out of the resin tower.
- Each ion-exchange resin tower 21 is filled with 2000-15000 L of ion-exchange resin depending on the treatment flow rate, and is mixed at a volume ratio of cationic resin / anion resin of about 1 / 2-3 / 1. Forming the floor.
- the resin layer height of the ion exchange resin tower is generally 90 200 cm Is usually about 100 cm.
- the flow velocity of the water flow in the ion exchange resin tower is generally in the range of 50-200 m / h, usually about 100 m / h.
- a mixture of a strongly acidic gel-type cation exchange resin and a strongly basic porous anion resin having a uniform particle size is mixed. It is characterized by forming a floor.
- Porous anion resins such as IRA900 of Organo Corporation and PA312 of Mitsubishi Chemical Corporation, which are usually used in condensate desalination equipment of conventionally known nuclear power plants, have a particle size distribution of 420 to 1180 zm. It has a so-called Gaussian distribution with an average particle size of about 800 ⁇ m.
- the porous ion-exchange resin has macropores, so the resin matrix has a very dense structure, and the reaction rate is low. Inferior to gel-type resin in surface.
- the resin particle size is one important factor that affects the reaction rate of the ion exchange resin. The larger the particle size, that is, the smaller the surface area, the lower the reaction rate.
- the resin matrix is dense, the adsorbed ions are less likely to diffuse into the grains, resulting in a lower reaction rate.
- the average particle size can be reduced as compared with an ion exchange resin having a Gaussian distribution.
- the differential pressure between a resin with a mean Gaussian distribution of approximately 800 ⁇ m and a uniform particle size resin with an average particle size of 650 ⁇ m is almost the same. Therefore, the average particle size can be reduced, which is advantageous in terms of the reaction rate.
- the diffusion distance of the adsorbed ions within the grains is shortened, which is advantageous.
- strong basic anion resins have type I and type II depending on the type of functional groups. Since type II anion resins have weak ion exchange capacity, condensate dewatering requires high treated water quality. I-type anion resin is mainly used in salt equipment. Therefore, also in the present invention, it is preferable to use an I-type strong basic anion resin having a uniform particle size.
- the porous resin has poor abrasion resistance. Therefore, in order to combine the porous resin with a gel-type cationic resin that requires frequent backwashing, it is necessary to devise an operation method. There is. Abrasion of resin occurs mainly when transferring resin and performing scrubbing with air.
- the tank on the side for receiving the resin is filled with water in advance to avoid the resin from directly colliding with the metal material; or by lowering the slurry concentration at the time of transferring the resin.
- type I strongly basic porous anion resin having a uniform particle size that can be used in the present invention
- MP725A sold by Dow Chemical Japan Co., Ltd.
- a commercially available porous ion exchange resin can be used by adjusting the particle size to an even particle size by an operation such as a water sieve.
- the ion exchange resin usually used in the conventionally known condensate desalination apparatus has a so-called Gaussian distribution whose particle size distribution is distributed to 420-1180 / im.
- the average particle size of the strongly basic porous anion resin is 500-1 000 / im, and the average particle size is preferably 550-800 ⁇ m in consideration of the differential pressure and reaction rate when water is passed through the device.
- the strong acid gel type cationic resin also has a particle size and a particle size distribution equivalent to those of the anion resin described above.
- Conventional ion-exchange resins having a Gaussian distribution have a resin particle abundance of about 50% in the average particle size range of 100 ⁇ m.
- Example 1 Example 1
- the strongly acidic gel-type cation resin HCR-W2-H (manufactured by Dow Chemical Japan Co., Ltd.), which has been widely used in condensate desalination equipment in nuclear power plants, has been compared with the Gaussian particle size distribution.
- Type I strongly basic gel type anion resin SBR-PC-OH (manufactured by Dow Chemical Japan Co., Ltd.) or type I uniform basic particle size strong basic porous anion resin MP725A (manufactured by Dow Chemical Japan Co., Ltd.) ) was combined to form a mixed bed, and a water flow test was performed to measure the concentration of ions leaking from the resin layer. The test simulated the same conditions as the actual plant, with the quality of the water to be treated, the temperature, the dissolved oxygen concentration, the height of the resin layer, and the water flow velocity equal to those of the actual plant.
- a column having an inner diameter of 25 mm was filled with the above cationic resin and anion resin mixed at a volume ratio of 2/1, and was sufficiently degassed with a conductivity of 0.006 mS / m and a temperature of 45 ° C. Then, pure water having a dissolved oxygen concentration of 20 ⁇ g / L was passed through the column. The treated water discharged from the column was irradiated with ultraviolet light to decompose the TOC contained in the treated water, and the concentration of the produced sulfate ions was analyzed by ion chromatography. The results are shown in Table 1.
- a column having an inner diameter of 16 cm was filled with 2 mL of an anion resin to form a resin layer height of 1 cm.
- a chemical solution with a NaCl concentration of 20 mg / L was passed through this column at a linear flow rate of 120 m / h, and the C1 concentration in the treated water was measured periodically to confirm the C1 removal characteristics of the anion resin layer.
- the results were summarized in relation to the ion exchange rate and the desalination rate with respect to the total exchange capacity of the anion resin.
- the desalting rate here was calculated by the following equation.
- a condensate desalination method and apparatus capable of obtaining high-purity treated water quality in condensate desalination treatment of a nuclear power plant.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/558,273 US7727405B2 (en) | 2003-05-27 | 2004-05-26 | Method for demineralizing condensate |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003-148565 | 2003-05-27 | ||
| JP2003148565A JP4383091B2 (ja) | 2003-05-27 | 2003-05-27 | 復水脱塩方法及び装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004107354A1 true WO2004107354A1 (ja) | 2004-12-09 |
Family
ID=33487121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/007163 Ceased WO2004107354A1 (ja) | 2003-05-27 | 2004-05-26 | 復水脱塩方法及び装置 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7727405B2 (ja) |
| JP (1) | JP4383091B2 (ja) |
| WO (1) | WO2004107354A1 (ja) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4943376B2 (ja) * | 2008-05-22 | 2012-05-30 | 株式会社荏原製作所 | 復水脱塩方法及び復水脱塩装置 |
| JP4943377B2 (ja) * | 2008-05-22 | 2012-05-30 | 株式会社荏原製作所 | 復水脱塩方法及び復水脱塩装置 |
| JP5038232B2 (ja) * | 2008-05-22 | 2012-10-03 | 株式会社荏原製作所 | 復水脱塩方法及び復水脱塩装置 |
| WO2011152909A2 (en) * | 2010-03-09 | 2011-12-08 | Kurion, Inc. | Isotope-specific separation and vitrification using ion-specific media |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08224579A (ja) * | 1994-11-30 | 1996-09-03 | Japan Organo Co Ltd | 復水脱塩装置 |
| JPH09187765A (ja) * | 1996-01-09 | 1997-07-22 | Kurita Water Ind Ltd | イオン交換装置 |
| JP2000046992A (ja) * | 1998-07-27 | 2000-02-18 | Ebara Corp | 復水脱塩装置 |
| JP2001246377A (ja) * | 2000-03-06 | 2001-09-11 | Japan Organo Co Ltd | 復水脱塩装置の運転方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3847805A (en) * | 1972-12-07 | 1974-11-12 | Illinois Water Treatment Co | Ion exchange vessel |
| NL185708C (nl) * | 1977-05-27 | 1990-07-02 | Northern Eng Ind | Werkwijze voor de regeneratie van ionenwisselaars. |
| JP2001215294A (ja) * | 1999-11-22 | 2001-08-10 | Japan Organo Co Ltd | 復水脱塩装置 |
-
2003
- 2003-05-27 JP JP2003148565A patent/JP4383091B2/ja not_active Expired - Fee Related
-
2004
- 2004-05-26 WO PCT/JP2004/007163 patent/WO2004107354A1/ja not_active Ceased
- 2004-05-26 US US10/558,273 patent/US7727405B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08224579A (ja) * | 1994-11-30 | 1996-09-03 | Japan Organo Co Ltd | 復水脱塩装置 |
| JPH09187765A (ja) * | 1996-01-09 | 1997-07-22 | Kurita Water Ind Ltd | イオン交換装置 |
| JP2000046992A (ja) * | 1998-07-27 | 2000-02-18 | Ebara Corp | 復水脱塩装置 |
| JP2001246377A (ja) * | 2000-03-06 | 2001-09-11 | Japan Organo Co Ltd | 復水脱塩装置の運転方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4383091B2 (ja) | 2009-12-16 |
| JP2004354056A (ja) | 2004-12-16 |
| US20070051683A1 (en) | 2007-03-08 |
| US7727405B2 (en) | 2010-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Arar et al. | Various applications of electrodeionization (EDI) method for water treatment—A short review | |
| US5980716A (en) | Water treatment apparatus for a fuel cell system | |
| KR100784438B1 (ko) | 연속 전기탈이온화 장치 및 방법 | |
| JP4943378B2 (ja) | 復水脱塩方法及び復水脱塩装置 | |
| CN110451704B (zh) | 一种含氟回用水的处理方法 | |
| JP2011110515A (ja) | イオン交換樹脂の精製方法及び精製装置 | |
| JP5762863B2 (ja) | アルコールの精製方法及び装置 | |
| KR100769919B1 (ko) | 복수 탈염 | |
| JP2011131210A (ja) | 窒素化合物含有酸性液の処理装置および処理方法 | |
| JP4943377B2 (ja) | 復水脱塩方法及び復水脱塩装置 | |
| Calmon | Recent developments in water treatment by ion exchange | |
| JP4119966B2 (ja) | 金属捕集材からの金属の溶離回収及び溶離液の再生方法 | |
| JPH11352283A (ja) | 復水処理方法及び復水脱塩装置 | |
| JP4467488B2 (ja) | 復水脱塩方法及び復水脱塩装置 | |
| JP4943376B2 (ja) | 復水脱塩方法及び復水脱塩装置 | |
| WO2004107354A1 (ja) | 復水脱塩方法及び装置 | |
| JP7261711B2 (ja) | 超純水製造システム及び超純水製造方法 | |
| RU2205692C2 (ru) | Способ ионообменной очистки воды, содержащей органические вещества, с противоточной регенерацией ионообменных материалов | |
| CN210796035U (zh) | 一种多晶硅生产过程产生的高盐水回收利用系统 | |
| JP5038232B2 (ja) | 復水脱塩方法及び復水脱塩装置 | |
| CN113304724A (zh) | 一种功能型无机二氧化硅基吸附材料的制备方法 | |
| JP2004279227A (ja) | 復水脱塩方法及び装置 | |
| JP3778541B2 (ja) | 復水脱塩装置 | |
| JP3900399B2 (ja) | 復水脱塩装置 | |
| JPH11216372A (ja) | 陽イオン交換樹脂の酸化剤による酸化劣化の防止処理方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| WWE | Wipo information: entry into national phase |
Ref document number: 2007051683 Country of ref document: US Ref document number: 10558273 Country of ref document: US |
|
| 122 | Ep: pct application non-entry in european phase | ||
| WWP | Wipo information: published in national office |
Ref document number: 10558273 Country of ref document: US |
