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1. 发明专利

JP2004057870A Treating method of boron-containing water 有权
公开(公告)号：JP2004057870A
公开(公告)日：2004-02-26
申请号：JP2002216478
申请日：2002-07-25
申请人： Asahi Eng Co Ltd , Kurita Water Ind Ltd , Tohoku Electric Power Co Inc , 旭エンジニアリング株式会社 , 東北電力株式会社 , 栗田工業株式会社
发明人： YAMAURA TSUGUAKI , SHINDO MANABU , IKOMA KAZUHIRO , KONNO SEIICHI , ASADA HIROYUKI , ETO YOSHIHIRO , SATO TAKESHI
IPC分类号： C02F1/28 , B01J20/06 , B01J20/34
摘要： PROBLEM TO BE SOLVED: To provide a treating method of boron-containing water by which stable treatment can be continued without lowering boron adsorbing ability of a granulated body in the treating method of the boron-containing water by which boron is removed by adsorption using the granulated body on which hydroxide of rare earth element is deposited. SOLUTION: In the treating method of the boron-containing water having an adsorbing process in which the boron-containing water is brought into contact with the granulated body on which hydroxide of rare earth element is deposited to remove boron by adsorption and a desorbing process in which a boron-adsorbed granulated body is brought into contact with an alkaline aqueous solution to desorb boron, an acid-treatment process in which the granulated body is brought into contact with an acid aqueous solution before or after bringing the granulated body into contact with the alkaline aqueous solution, is provided. COPYRIGHT: (C)2004,JPO

2. 发明专利

JP2003080269A Method for treating boron-containing water 审中-公开
标题翻译：用于处理含硼水的方法
公开(公告)号：JP2003080269A
公开(公告)日：2003-03-18
申请号：JP2001271428
申请日：2001-09-07
申请人： Kurita Water Ind Ltd , Tohoku Electric Power Co Inc , 東北電力株式会社 , 栗田工業株式会社
发明人： HAYASAKA TAKAO , YAMAURA TSUGUAKI , SATO TAKESHI , ETO YOSHIHIRO , ASADA HIROYUKI
IPC分类号： C02F1/52 , C02F1/42 , C02F1/58
摘要： PROBLEM TO BE SOLVED: To provide a method for treating boron-containing water by which the amount of chemicals used and the regeneration frequency of an ion exchange resin are reduced and boron can be efficiently removed by flocculation precipitation and/or ion exchange.
SOLUTION: (1) In the method for treating boron-containing water by flocculation precipitation, the concentration of boron in the boron-containing water is automatically analyzed and the amount of a flocculant added is automatically controlled. (2) When the boron-containing water is treated by an ion exchange method, the concentration of boron is automatically analyzed and time appropriate to the regeneration of an ion exchange resin is automatically controlled. (3) When the boron-containing water is treated by the ion exchange method after treatment by flocculation precipitation, the concentration of boron is automatically analyzed and the amount of a flocculant added is automatically controlled.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种处理含硼水的方法，通过该方法可以减少使用的化学品的使用量和离子交换树脂的再生频率，并且可以通过絮凝沉淀和/或离子交换有效地除去硼。解决方案：（1）在通过絮凝沉淀处理含硼水的方法中，自动分析含硼水中硼的浓度，并自动控制添加的絮凝剂的量。（2）当通过离子交换法处理含硼水时，自动分析硼的浓度，自动控制适合离子交换树脂再生的时间。（3）当通过絮凝沉淀处理后，通过离子交换法处理含硼水时，自动分析硼的浓度，并自动控制添加的絮凝剂的量。

3. 发明专利

JP2000185222A CHEMICAL CLEANING METHOD FOR MEMBRANE SEPARATOR FOR SOLID-LIQUID SEPARATION 失效
公开(公告)号：JP2000185222A
公开(公告)日：2000-07-04
申请号：JP36490998
申请日：1998-12-22
申请人： TOHOKU ELECTRIC POWER CO , KURITA WATER IND LTD
发明人： SASAKI YU , NIHEI MIKIO , FUJITA HIROYUKI , SATO TAKESHI
IPC分类号： B01D65/06
摘要： PROBLEM TO BE SOLVED: To clean a membrane separator for solid-liquid separation of heavy membrane sludge by performing a chemical cleaning process in which after a cleaning chemical is supplied to a raw water/concentrated water chamber, heated water is supplied to a filtrate chamber and a backwashing process in which pressurized water is supplied to the filtrate chamber. SOLUTION: A cleaning chemical in a NaOH adjustment tank 4 (or a HCl adjustment tank 5) is supplied to the primary side 1A of a membrane module 1 by a pump P4 (a pump P5). In order to increase a cleaning effect by a chemical, hot water in a circulating/heating tank 7 is circulated to the secondary side 1B of the module 1 by a pump P6, and the chemical packed in the primary side 1A is heated indirectly. Water in a backwashing tank 6 is pressurized at the pressure of the primary side 1A or above by compressed air and made to back-flow from the secondary side 1B to the primary side 1A to push out contaminants in membrane pores to the primary side 1A. After each automatic valve V4, V5b was closed by being controlled by the level sensor LS of the tank 6, industrial water in an industrial water strong tank 3 is supplied to the tank 6.

4. 发明专利

JPH11197459A MEMBRANE FILTER APPARATUS 失效
公开(公告)号：JPH11197459A
公开(公告)日：1999-07-27
申请号：JP853998
申请日：1998-01-20
申请人： TOHOKU ELECTRIC POWER CO , KURITA WATER IND LTD
发明人： SATO TOSHIRO , NIHEI MIKIO , FUJITA HIROYUKI , SATO TAKESHI , CHIKASAWA KIYOHITO
IPC分类号： B01D61/18 , B01D61/20 , B01D65/02
摘要： PROBLEM TO BE SOLVED: To enable long-term continuous operation by preventing the generation of the pulsating flow of raw water at a time of backwashing causing the damage of a membrane in a membrane filter apparatus introducing backwashing water from a permeated water side under pressure while continuing the passage of raw water. SOLUTION: In a membrane filter apparatus intermittently introducing the backwashing water of a backwashing tank W into the permeated water sides of membrane modules M1 , M2 and M3 by opening backwashing valves V10 , V20 and V30 while continuing the supply of raw water to perform backwashing, automatic valves V12 , V22 and V32 are provided to conc. water discharge lines and opened during a period when backwashing water is introduced into the membrane modules M1 , M2 , M3 under pressure to discharge conc. water.

5. 发明专利

JPH1110196A METHOD FOR TREATING WASTEWATER OF THERMOELECTRIC POWER PLANT 失效
公开(公告)号：JPH1110196A
公开(公告)日：1999-01-19
申请号：JP16239797
申请日：1997-06-19
申请人： TOHOKU ELECTRIC POWER CO , KURITA WATER IND LTD
发明人： SATO TOSHIRO , HORI YOJI , FUJITA HIROYUKI , CHIKASAWA KIYOHITO , TAKADOI TADASHI , SATO TAKESHI
IPC分类号： C02F1/44 , C02F1/52 , C02F9/00
摘要： PROBLEM TO BE SOLVED: To prevent a lowering of membrane flux by a method wherein when a normal-wastewater treatment is changed over to an abnormal-wastewater treatment, pH of coagulation treatment is adjusted to a specific value, and when pH of water supplied to a membrane separation device becomes a specific value, an adjustment is made so that the concentration of ferrous ions of water becomes a specific value or higher. SOLUTION: Wastewater of a thermoelectric power plant is introduced into a coagulation reaction tank 1 so as to be subjected to a coagulation treatment under conditions that pH adjusting agents and flocculants are added to the wastewater, and the resulting coagulated liquid is led to a membrane separation device 3 through a circulation tank 2 to obtain treated water. In such treatment method, when a treatment in which wastewater of the power plant contains relatively small amount of primary ferrous ions is changed over to a treatment in which the wastewater contains relatively large amount of primary ferrous ions, pH of coagulation treatment is adjusted to 8-9. And when pH of water supplied to the device 3 becomes 8-9, an adjustment is made so that the concentration of primary ferrous ions of water becomes 100 mg/L or more. Thus membrane flux can be prevented from falling.

6. 发明专利

JPH0929073A MEMBRANE SEPARATOR 失效
公开(公告)号：JPH0929073A
公开(公告)日：1997-02-04
申请号：JP18706895
申请日：1995-07-24
申请人： TOHOKU ELECTRIC POWER CO , KURITA WATER IND LTD
发明人： ISHIYAMA KAZUHIRO , SASAKI YU , SATO TAKESHI , MATSUTANI NAOKI , HIROTA MORIYUKI
IPC分类号： B01D65/02 , B01D65/08
摘要： PROBLEM TO BE SOLVED: To prolong the life of a membrane by preventing the recontamination of the membrane after backward washing. SOLUTION: In a membrane separator taking out the transmitted water of a membrane module 1 through a backward washing pressure tank 2, a backward washing passage 13B having a valve V1 opened only at a time of backward washing and a transmitted water taking-out passage 13A having a valve Vs permitting only the flow in a forward direction from the membrane module 1 to the backward washing pressure tank 2 and a constant flow valve Vf making this flow constant are provided. In a backward washing process, the transmitted water in the tank 2 is allowed to flow backward to the transmitted water chamber 1b of the membrane module 1 through the backward washing passage 13B. The transmitted water is always taken out of the membrane module 1 through the transmitted water taking-out passage 13A having the constant flow valve Vf. Since the flow rate of transmitted water becomes constant even immediately after backward washing, the recontamination of a membrane by the flow of a large quantity of transmitted water after backward washing is prevented.

7. 发明专利

JPH10137770A TREATMENT OF WASTE WATER CONTAINING SULFURIC ACID 失效
公开(公告)号：JPH10137770A
公开(公告)日：1998-05-26
申请号：JP30473796
申请日：1996-11-15
申请人： TOHOKU ELECTRIC POWER CO , KURITA WATER IND LTD
发明人： FUJITA HIROYUKI , NIHEI MIKIO , CHIKASAWA KIYOHITO , TAKADOI TADASHI , SATO TAKESHI
IPC分类号： C02F1/44 , C02F1/58
摘要： PROBLEM TO BE SOLVED: To prevent reduction in membrane flux due to clogging, breakage, etc., of membranes, to stabilize the treatment and to improve efficiency of the treatment by adding a calcium compound to waste water contg. sulfuric acid in two stages, i.e., in a first stage and a second stage respectively to adjust pH of the waste water to specified values in the first and second stages respectively, subjecting insoluble matter thus formed in the resulting water to membrane separation to obtain permeant water and discharging the permeant water to the outside of the treatment system as treated water. SOLUTION: In the system of this treatment, waste water contg. sulfuric acid is introduced into a first reaction vessel 1 fitted with a pH meter IA and thereafter, a calcium compound such as Ca(OH)2 , or the like is added to the waste water to adjust the pH to 4 to 6, or preferably, about 4.5 to 5.5. Then, this waste water is further introduced into a second reaction vessel 2 fitted with a pH meter 2A and similarly, a calcium compound is added to the waste water to adjust the pH to 6.5 to 8. The resulting water is treated with a circulation vessel 3 and a membrane module 5, to obtain membrane permeant water. The permeant water is transferred to a permeant water tank 6 for backwashing to discharge the permeant water from the tank 6 to the outside of the system as treated water. By performing the addition of a calcium compound to waste water contg. sulfuric acid and the adjustment of pH of the waste water in two stages, the dissolution amounts of scale-forming components can sufficiently be reduced and also, deposition of coarse particles can be prevented from occurring. Thus, trouble due to scale formation, membrane breakage, etc., can be prevented from being caused.

8. 发明专利

JPH0929267A TREATMENT METHOD FOR MANGANESE-CONTAINING WASTEWATER 失效
公开(公告)号：JPH0929267A
公开(公告)日：1997-02-04
申请号：JP18706595
申请日：1995-07-24
申请人： TOHOKU ELECTRIC POWER CO , KURITA WATER IND LTD
发明人： ISHIYAMA KAZUHIRO , SASAKI YU , TAKADOI TADASHI , CHIKASAWA KIYOHITO , MITA MASAICHIRO , SATO TAKESHI
IPC分类号： C02F1/64
摘要： PROBLEM TO BE SOLVED: To stably and efficiently treat manganese-containing wastewater, e.g. flue gas desulfurization wastewater, by making manganese insoluble by adding a permanganate to the manganese-containing wastewater and then insolubilizing the remaining permanganate by adding a sulfur-containing compound and successively separating insoluble substances by solid-liquid separation. SOLUTION: Manganese-containing wastewater, e.g. flue gas wastewater, is led to an adjustment tank 1, pH of the wastewater is adjusted to be 8.0-9.5 by adding an alkali such as NaOH and, at the same time, air aeration is carried out by an air bubbling pipe 13. Next, the wastewater flowing out of the adjustment tank 1 is led to a first reaction tank 2 and fluorine is converted into an insoluble substance by adding a permanganate, e.g. KMnO4 , or an aluminum compound, an alkali, etc., and adjusting pH to about 6.0-7.5. After that, the resultant wastewater flowing out of the first reaction tank 2 is led to a second reaction tank 3 and the permanganate is converted into an insoluble substance by adding a sulfur-containing compound. The obtained wastewater flowing out of the second reaction tank 3 is then led to a membrane separation apparatus 5 through a circulation tank 4 and a pump P and the insoluble substances are separated and removed.

9. 发明专利

JP2003170173A TREATMENT METHOD FOR WASTE WATER FROM COALYARD 审中-公开
公开(公告)号：JP2003170173A
公开(公告)日：2003-06-17
申请号：JP2001372719
申请日：2001-12-06
申请人： TOHOKU ELECTRIC POWER CO , KURITA WATER IND LTD
发明人： NIHEI MIKIO , SUGANO TAKESHI , SATO TAKESHI
IPC分类号： C02F1/52
摘要： PROBLEM TO BE SOLVED: To provide a treatment method for waste water from a coalyard of a coal-fired thermal power station which can increase the settling rate of suspended solids and can reduce the turbidity of treated water in treating the coalyard waste water. SOLUTION: The treatment method for the coalyard waste water comprising regulating the pH of the coalyard waste water to ≤4 and subjecting the waste water to solid-liquid separation by adding a flocculating agent to the waste water. COPYRIGHT: (C)2003,JPO

10. 发明专利

JPH1110151A TREATMENT EQUIPMENT FOR SULFURIC ACID ION CONTAINING WASTE WATER 失效
公开(公告)号：JPH1110151A
公开(公告)日：1999-01-19
申请号：JP16239697
申请日：1997-06-19
申请人： TOHOKU ELECTRIC POWER CO , KURITA WATER IND LTD
发明人： SASAKI YU , NIHEI MIKIO , FUJITA HIROYUKI , CHIKASAWA KIYOHITO , TAKADOI TADASHI , SATO TAKESHI
IPC分类号： B01D53/34 , B01D53/50 , B01D53/77 , B04C9/00 , C02F1/44 , C02F1/58
摘要： PROBLEM TO BE SOLVED: To prevent the deterioration of a membrane by a cyclone for removing bulky particles out of insoluble matter containing water and flowing the insoluble matter containing water through the cyclone by the liquid transfer force of a pump in the case of membrane separation of insoluble matters provided by adding a calcium compound into sulfuric acid ion containing waste water. SOLUTION: Sulfuric acid ion containing waste water (raw water) is introduced into a flocculation reaction tank 1, and slaked lime is added therein and adjusted to pH 4-8 to separate sulfuric acid ions in raw water as gypsum. Insoluble matter containing water flowed out of the flocculation reaction tank 1 is passed through a circulating tank 2 and transferred to a membrane module 4 by a circulating pump 3, and solid-liquid separated by the cross flow filtration, and permeated water is discharged as treated water. On the other hand, a part of condensed water is returned to the flocculation reaction tank l and a remaining part is circulated into the circulating tank 2, and a cyclone 5 is provided on a circulating piping of the tank, and bulky particles in the condensed water are removed by the cyclone 5. Condensed water is flowed into the cyclone 5 by the liquid transfer force of the circulating pump 3 at the flow rate required for revolution.

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