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11. 发明专利

JPH0929070A MEMBRANE SEPARATOR FOR WATER TREATMENT 失效
公开(公告)号：JPH0929070A
公开(公告)日：1997-02-04
申请号：JP18706795
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 , SATO TAKESHI , MATSUTANI NAOKI
IPC分类号： B01D61/14 , C02F1/44
摘要： PROBLEM TO BE SOLVED: To accurately detect the clogging degree of a membrane by calculating an amt. of transmitted water in terms of reference differential pressure and reference temp. from the amt. of transmitted water detected by a transmitted water amt. detection means. SOLUTION: At first, an amt. of transmitted water is calculated from the detection value of a flowmeter F-1 and the membrane area of a membrane module 4. Then, the amt. of transmitted water under a reference condition is calculated in terms of reference differential pressure and reference temp. from the respective detection values of pressure gauges P-1, P-2, P-3 and the viscosity calculated from the temp. detected by a thermometer T-1 and the future amt. of transmitted water under the reference condition can be estimated from the transition of this calculated amt. of transmitted water. Therefore, the amt. of transmitted water under the reference condition necessary for chemical washing is preset and, when the amt. of transmitted water under the reference condition lowers to this set value, chemical washing is performed to make it possible to perform chemical washing corresponding to the state of a membrane. Since the lowering of the amt. of transmitted water under the reference condition can be easily estimated, a chemical washing period can be easily estimated and the operation control of the apparatus becomes easy.

12. 发明专利

JPH11319515A METHOD FOR CLEANING MEMBRANE MODULE WITH CLEANING AGENT 失效
公开(公告)号：JPH11319515A
公开(公告)日：1999-11-24
申请号：JP13531498
申请日：1998-05-18
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： B01D65/02 , B01D65/06
摘要： PROBLEM TO BE SOLVED: To significantly reduce the consumption of a cleaning agent, and dispense with a specical chemical-resistant member as a material for a heating installation, piping or the like by supplying a cleaning agent to and filling an untreated water and concentrated water chamber with the cleaning agent and supplying a heated water to a permeating water chamber, when cleaning a membrane module with a cleaning agent. SOLUTION: When treating an untreated water by membrane separation, the untreated water is guided to the primary side 1A of a membrane module 1 through piping, and the permeating water which permeates to the secondary side 1B is delivered through a water collecting valve V-5. When cleaning the membrane module with a cleaning agent, the water collecting valve V-5, V-3, V-4 are closed and the valves V-1, V-2 are opened. Then a cleaning liquid is supplied to the primary side 1A of the membrane module 1 from a cleaning liquid tank 2 with the help of a cleaning pump 3 to replace the liquid on the primary side 1A with the cleaning liquid. After that, the valves V-1, V-2 are closed and the valves V-3, V-4 are opened. Further, a heated process water in a heated process water circulation tank 5 is circulated to the secondary side 1B of the membrane module 1 using a circulation pump 6 and thereby the cleaning liquid on the primary side 1A is heated to increase the effect to clean the membrane.

13. 发明专利

JPH10137755A MEMBRANE TREATING DEVICE OF WASTE WATER 失效
公开(公告)号：JPH10137755A
公开(公告)日：1998-05-26
申请号：JP30473696
申请日：1996-11-15
申请人： TOHOKU ELECTRIC POWER CO , KURITA WATER IND LTD
发明人： FUJITA HIROYUKI , SASAKI YU , TAKADOI TADASHI , SATO TAKESHI , MATSUTANI NAOKI
IPC分类号： C02F1/44 , C02F1/28 , C02F1/52
摘要： PROBLEM TO BE SOLVED: To prevent deterioration of membrane flux and to stabilize the flux for a long period only by back-washing. SOLUTION: A flocculant and

14. 发明专利

JPH10137542A TREATMENT OF FLUE GAS DESULFURIZATION WASTE WATER 失效
公开(公告)号：JPH10137542A
公开(公告)日：1998-05-26
申请号：JP32219796
申请日：1996-11-18
申请人： TOHOKU ELECTRIC POWER CO , KURITA WATER IND LTD
发明人： FUJITA HIROYUKI , ABE KEIKO , MATSUTANI NAOKI , TAKADOI TADASHI , SATO TAKESHI , CHIKASAWA KIYOHITO
IPC分类号： B01D53/50 , B01D53/77 , B01D65/06 , C02F1/44 , C02F9/00
摘要： PROBLEM TO BE SOLVED: To decrease the frequency of the exchange of a membrane by cleaning the membrane, soiled by the continuation of treatment, with a cleaning solution containing oxalic acid to improve the recovering ratio of the membrane by cleaning and to prolong the period for executing chemical cleaning. SOLUTION: At first an alkali cleaning solution in an alkali storage tank 9 is supplied to the water permeating side of a membrane separation device 6 by driving a pump 11, returned to the alkali storage tank 9 through a pipe line and circulated for a fixed time. Next, the alkali cleaning solution is fed to the concentrated water side and circulated. After that, the cleaning solution is switched to an acid cleaning solution, the acid cleaning solution in an acid storage tank 10 is circulated between the acid storage tank 10 and the membrane separation device 6 in the same manner to clean the membrane. By cleaning in this way, the membrane-soiling material specific to the flu gas desulfurization waste water is removed and the membrane performance is recovered. And a cleaning waste water generated by the cleaning of the membrane is treated without providing an additional waste water treating device by using the treating process of the flue gas desulfurization waste water.

15. 发明专利

JP2001198581A METHOD FOR TREATING BORON-CONTAINING WATER 失效
公开(公告)号：JP2001198581A
公开(公告)日：2001-07-24
申请号：JP2000010208
申请日：2000-01-14
申请人： KURITA WATER IND LTD
发明人： ETO YOSHIHIRO , SATO TAKESHI , ASADA HIROYUKI
IPC分类号： C02F1/42 , B01J49/00 , C02F1/52 , C02F1/58
摘要： PROBLEM TO BE SOLVED: To provide a method for treating boron-containing water capable of efficiently removing boron by using low chemical quantity and at high removing efficiency with a simple device and operation and capable of providing high quality treated water. SOLUTION: Boron is adsorbed by introducing the boron-containing water 5 to an adsorption tower 1 and allowing the water to contact with a boron selecting adsorbing resin 2, then regenerated waste liquid 8 is introduced to a flocculating tank 3, and an aluminum compound 9 and a pH adjusting agent 11 are added thereto to adjust its pH to 5-8 without adding chloride ion, and the boron is removed by separating a deposit using a solid-liquid separating device 4.

16. 发明专利

JP2001025777A WATER TREATING METHOD 失效
公开(公告)号：JP2001025777A
公开(公告)日：2001-01-30
申请号：JP20232499
申请日：1999-07-15
申请人： KURITA WATER IND LTD
发明人： ETO YOSHIHIRO , SATO TAKESHI , ASADA HIROYUKI
IPC分类号： C02F1/58 , C02F1/52 , C02F1/70 , C02F1/72
摘要： PROBLEM TO BE SOLVED: To provide a water treating method low in decrease of membrane flux and capable of efficiently removing selenium and fluorine by treating the waste water containing the selenium, the fluorine and a suspended substance such as stack gas desulfurized waste water of a coal-fired power plant by membrane separation. SOLUTION: The water containing selenium and fluorine is subjected to flocculating solid-liq. separation by adding a flocculating agent at a flocculation tank 1, brought into contact with iron at acidic condition to elute an iron (II) ion, then allowed to react with an oxidizing agent to precipitate ferric hydroxide, added with an inorg. flocculating agent and subjected to membrane separation at a membrane separation device 6.

17. 发明专利

JPH10180047A MEMBRANE SEPARATION DEVICE 失效
公开(公告)号：JPH10180047A
公开(公告)日：1998-07-07
申请号：JP34517296
申请日：1996-12-25
申请人： KURITA WATER IND LTD
发明人： MATSUTANI NAOKI , SATO TAKESHI
IPC分类号： B01D61/58
摘要： PROBLEM TO BE SOLVED: To stably and efficiently execute a treatment by providing a constant flow rate valve or a flow control value at the permeated water outlet side of each membrane module. SOLUTION: A flocculation treated liquid is passed through a membrane module 1A by a feed pump 4 and a circulating pump 5 and the concentrated water by the membrane module 1A is passed through a membrane module 1B. The concentrated water by the membrane 1B is circulated to the membrane module 1A by the circulating pump 5. On the other hand, each permeated water from the membrane module 1A and 1B is taken out through each constant flow rate valve 7A and 7B and a back washing pot 8 as a treated water. Each permeated water from the membrane module 1A and 1B is adjusted to a fixed flow rate respectively by the constant flow rate valve 7A and 7B, the permeated quantity from the membrane module 1A and 1B are controlled to be equal to each other to equalize the load and the progress of the membrane soiling is almost equalized and as a result, the membrane surface is effectively used and the performance of the whole membrane separation device is stably maintained over a long period.

18. 发明专利

JPH10180008A MEMBRANE SEPARATION DEVICE 失效
公开(公告)号：JPH10180008A
公开(公告)日：1998-07-07
申请号：JP34753396
申请日：1996-12-26
申请人： KURITA WATER IND LTD
发明人： TAKADOI TADASHI , SATO TAKESHI , CHIKASAWA KIYOHITO
IPC分类号： C02F1/44 , B01D21/01 , C02F1/52
摘要： PROBLEM TO BE SOLVED: To prevent the decrease in flux in a membrane module by adding an org. polymer flocculant (polymer) to the liquid which is subjected to flocculation treatment with an inorg. flocculant so that fine particles are flocculated into flocs with a larger particle size and to increase the density. SOLUTION: The raw water is introduced into a first reaction tank 1, where an inorg. flocculant such as an aluminum compd. and iron compd., and if necessary a pH controlling agent are added to the water to flocculate under specified pH condition. The treated liquid by flocculation in the first reaction tank 1 is then introduced into a second reaction tank 2, where a polymer is added. As for the polymer, various kinds such as anion, cation and nonion polymers can be used. These polymers may be used as a single state or a mixture of two or more. The treated liquid by flocculation in the second reaction tank 2 is circulated by a circulating pump P through a circulation tank 3 and sent to a membrane module 4. After the water permeated through the membrane of the membrane module 4, the water as a treated water is discharged to the outside, while the concentrated water is returned to the circulation tank 3.

19. 发明专利

JPH10146519A MEMBRANE MODULE 失效
公开(公告)号：JPH10146519A
公开(公告)日：1998-06-02
申请号：JP30908896
申请日：1996-11-20
申请人： KURITA WATER IND LTD
发明人： TAKADOI TADASHI , SATO TAKESHI , MATSUTANI NAOKI , CHIKASAWA KIYOHITO
IPC分类号： B01D63/02
摘要： PROBLEM TO BE SOLVED: To improve the workability at the time of evaluating the power of a membrane module, which is produced by filling a casing with membrane elements, by forming aperture parts which can be opened and closed to make it possible to touch hollow fiber membranes in the inside in at least two positions. SOLUTION: In the case membrane module evaluation is carried out at the time when the collected amount of permeated water of a membrane separation apparatus can not be recovered even if the membrane module is washed, a vessel 24, which is a pressure container, and covering covers 25, 26 composing a casing 20 of the membrane module are disassembled and the hollow fiber membranes 11 in the pottings 12, 13 of the vessel 24 are observed. Moreover, covers 27' 28' of a pair of aperture parts 27, 28 installed in the vessel 24 are also disassembled to observe the hollow fiber membranes 11 in the vessel 24. Then, any one of hollow fiber membranes 11 in the vessel 24 is cut from one aperture part 27 and at the same time another part of a hollow fiber membrane 11 is cut from the other aperture part 28 and the cut part is taken out through the aperture part 28 and based on the part of the taken out hollow fiber membrane 11, the deterioration of the hollow fiber membranes 11 is evaluated.

20. 发明专利

JPH07204474A MEMBRANE SEPARATION APPARATUS AND WASHING THEREOF 失效
公开(公告)号：JPH07204474A
公开(公告)日：1995-08-08
申请号：JP203894
申请日：1994-01-13
申请人： ELECTRIC POWER DEV CO , KURITA WATER IND LTD
发明人： SHIRAKATA TADASHI , KUSANO TERUHIKO , SATO TAKESHI , ICHIYANAGI NAOTO
IPC分类号： B01D65/02
摘要： PURPOSE:To efficiently wash the interior of a membrane separation apparatus. CONSTITUTION:A raw water chamber washing process opening valves V4, V5 and closing other valves to circulating washing water only to the raw water chamber 20 of a membrane separation apparatus main body 2 and a transmitted water chamber washing process opening valves V6, V7 and closing other valves to circulating washing water only to a transmitted water chamber 2b are executed. By this constitution, washing water is not transmitted through a separation membrane during washing. Therefore, the contamination of the separation caused by the bonding of fine particles peeled and dispersed in washing water or fine particles originating from raw water for washing to the surface or interior of the separation membrane at the time of transmission is not caused. Good washing effect can be certainly obtained by efficient washing.

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