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51. 发明专利

JPH11216373A METHOD FOR REGENERATING ION EXCHANGE RESIN FOR DESALTING CONDENSED WATER 失效
公开(公告)号：JPH11216373A
公开(公告)日：1999-08-10
申请号：JP2208098
申请日：1998-02-03
申请人： KURITA WATER IND LTD
发明人： TSURUMI TAKESHI , MISUMI YOSHITERU
IPC分类号： C02F1/42 , B01J49/00
摘要： PROBLEM TO BE SOLVED: To prevent the generation of eluted substances from ion exchange resins by setting the temperature of water contacting the resins at a specified value when condensed water is desalted to regenerate the resins which caught hydrazine. SOLUTION: The regeneration of ion exchange resins (condensed water ion desalting exchange resins) which caught hydrazine by desalting condensed water is implemented in a procedure consisting of the first transfer process (transfer of ion exchange resins from a desalting column to a separation-regeneration column), a backwash-separation process (backwash of the resins in a separation- regeneration column and separation of anion and cation exchange resins), the second transfer process, a regeneration process (regeneration of each resin in a regeneration column and a separation-regeneration column), a water-washing process (extrusion-washing of a regenerating agent), and other in this order. Each process is implemented at a water temperature of at the highest 15 deg.C. The generation of oxidative substances generated by the reaction between solvent oxygen in water and hydrazine is controlled, reducing the generation of resinous eluted substances composed mainly of a sulfonate.

52. 发明专利

JPH10337485A METHOD FOR REGENERATING ANION EXCHANGE RESIN 失效
公开(公告)号：JPH10337485A
公开(公告)日：1998-12-22
申请号：JP15129797
申请日：1997-06-09
申请人： KURITA WATER IND LTD
发明人： TSURUMI TAKESHI , OBATA KASHU
IPC分类号： B01J49/00
摘要： PROBLEM TO BE SOLVED: To regenerate anion exchange resin in a short time and at a low cost and to recover ion exchange performance by allowing a regenerant of specific concentration to flow through the anion exchange resin at a specific space velocity in the state heated at a specific temp., and bringing the regenerant, into contact with the anion exchange resin. SOLUTION: In the state that an anion exchange resin layer is heated at 40-60 deg.C, preferably at 40 - about 50 deg.C, the regenerant of low concentration is allowed to flow at high speed to regenerate it. As a heating method of the anion exchange layer, any optional method such as heating with electric heating or heating with infrared radiation, can be used, and heating with hot water is preferred. A water flow quantity of hot water is desired to be >= about one time in a volume ratio of the anion exchange resin, preferably about 1-3 times. The water flow speed is desired to be 15-40 hr at the space velocity(SV), preferably about 20-35 hr . An alkali aqueous liquid such as an ammonia aqueous liquid and a sodium hydroxide aqueous liquid can be used as the regenerant. The concentration is 1-3.5 wt.%, preferably about 2-3 wt.%.

53. 发明专利

JPH10230171A REGENERATION OF CONDENSED WATER DESALTING APPARATUS 失效
公开(公告)号：JPH10230171A
公开(公告)日：1998-09-02
申请号：JP3383197
申请日：1997-02-18
申请人： KURITA WATER IND LTD
发明人： TSURUMI TAKESHI , NOMURA MAKOTO
IPC分类号： G21F9/12 , B01J49/00
摘要： PROBLEM TO BE SOLVED: To efficiently regenerate an anion exchange resin, even in such a case that condensed water of a system wherein amines low in volatility are added to a steam generator is treated, by eluting a decomposition product of amines adsorbed on the anion exchange resin, especially, fatty acid having a relatively high mol.wt. such as glycolic acid in a high elution ratio. SOLUTION: In a method for regenerating a condensed water desalting apparatus passing condensed water through a mixed bed of an anion exchange resin and a cation exchange resin to perform desalting, the mixed bed is separated into the anion exchange resin bed and the cation exchange resin bed and the anion exchange resin bed is brought into contact with alkali (bi)carbonate and subsequently brought into contact with alkali hydroxide to be regenerated while the cation exchange resin is brought into contact with an acid to be generated. Herein, the regeneration waste soln. of the anion exchange resin containing alkali (bi)carbonate and the regeneration waste soln. of the cation exchange resin containing the acid are mixed and a soln. obtained by absorbing generated carbon dioxide by alkali hydroxide is used as alkali (bi)carbonate in the next regeneration.

54. 发明专利

JPH10230170A METHOD FOR REGENERATION OF ION EXCHANGE RESIN 失效
公开(公告)号：JPH10230170A
公开(公告)日：1998-09-02
申请号：JP3533197
申请日：1997-02-19
申请人： KURITA WATER IND LTD
发明人： TSURUMI TAKESHI , OBATA KASHU
IPC分类号： B01J49/00
摘要： PROBLEM TO BE SOLVED: To regenerate ion exchange resin within a short time at a low cost and miniaturize an apparatus by passing a regenerating agent in a specified concentration with a flow rate at specified spatial velocity and bringing the agent into contact with the ion exchange resin. SOLUTION: At the time when cation or anion exchange resin used for a pure water producing apparatus is regenerated, as a regenerating agent, an aqueous acidic solution such as hydrochloric acid, aqueous acidic solutions, etc., is used for cation exchange resin and an aqueous alkaline solution such as an aqueous ammonia solution, an aqueous sodium hydroxide solution, etc., is used for anion exchange resin. The concentration of the regenerating agent is controlled to be 1-3.5wt.%, preferably 2-3wt.% and regeneration is carried out by passing the regenerating agent through ion exchange resin layers. In this case, the spatial velocity of the regenerating agent is controlled to be 15-40/hr , preferably 20-35/hr, for both cation and anion exchange resin. The agent liquid passing direction may be both upward flow and downward flow and upward flow is preferable.

55. 发明专利

JPH09308881A WASHING OF CONDENSED WATER DESALTING APPARATUS 失效
公开(公告)号：JPH09308881A
公开(公告)日：1997-12-02
申请号：JP12480896
申请日：1996-05-20
申请人： KURITA WATER IND LTD
发明人： TSURUMI TAKESHI , NOMURA MAKOTO
IPC分类号： C02F1/42 , B01J49/00
摘要： PROBLEM TO BE SOLVED: To wash a condensed water desalting apparatus within a short washing time by reducing the load of a suspension of a metal oxide leaked at the initial period of the passage of water after the regeneration of a desalting tower to an ion exchange resin bed. SOLUTION: In a condensed water treatment system wherein condensed is filtered by a filter 1 and filtered condensed water and unfiltered condensed water are parallelly passed through a plurality of desalting columns 2a, 2b... of a condensed water desalting apparatus 2 to be desalted, the anion and cation exchange resins of the mixed bed 7a of the desalting column 2a lowered in its desalting capacity are backward washed and separated to be regenerated and washed, and the washed resins are mixed in the desalting column 2a to form the mixed bed 7a to perform washing at the initial stage of water passage. At this time, the washing waste waster of the desalting column 2a is circulated to the filter 1 to be filtered before introduced into the desalting column 2a to perform circulating washing.

56. 发明专利

JPH08294636A FUNCTION RECOVERING METHOD FOR ANION EXCHANGE RESIN IN CONDENSATE DESALTING DEVICE 失效
公开(公告)号：JPH08294636A
公开(公告)日：1996-11-12
申请号：JP10398895
申请日：1995-04-27
申请人： KURITA WATER IND LTD
发明人： TSURUMI TAKESHI , ODA NOBUHIRO
IPC分类号： B01J49/00 , C02F1/42
摘要： PURPOSE: To provide a function recovering method for a condensate desalting device which can remove iron cladding efficiently form anion exchange resin with the iron cladding adhering thereon to recover its function, lessen a remaining Cl form and also lessen the leakage of iron cladding, Cl ions and the like. CONSTITUTION: Iron cladding is melted by bringing anion exchange resin, to which iron cladding adheres, into contact with hydrochloric acid, and then the anion exchange resin converted into a Cl form is brought into contact with acid other than hydrochloric acid or salt to convert the resin into some other salt form. Then, regeneration is carried out with alkali to convert the form into an OH form to recover the function, and provided to the desalting of condensate.

57. 发明专利

JPH0824524A FILTER 失效
公开(公告)号：JPH0824524A
公开(公告)日：1996-01-30
申请号：JP18194994
申请日：1994-07-12
申请人： KURITA WATER IND LTD
发明人： TSURUMI TAKESHI
IPC分类号： B01D24/00 , B01D24/38 , B01D29/62 , B01D29/66 , B01D29/88
摘要： PURPOSE:To directly or indirectly give impact to a filter medium to strip SS that has been captured by providing a collision member on which a fibrous block filter medium collides when a filter bed is backward washed on the upper surface of the filter bed. CONSTITUTION:A filter bed 3 consisting of a fibrous block filter medium is formed on a lower water collecting plate 2 of a tank filter 1. A collision member 9 on which the fibrous block filter medium collides when the filter bed 3 is backward washed is attached. The collision member 9 may have an arbitrary form, but it occupies such a position that the filter medium collides with it properly and the flow thereof is not prevented. Then, on backward washing by air and washing water, the filter medium collides with the collision member 9 and also the filter medium come into collision is reoriented and collides with the other filter medium, allowing a lot of SS captured to be effectively stripped. Therefore, good washing effect is obtained, and the filter medium is used for a long period of time.

58. 发明专利

JPH0751511A FILTERING APPARATUS 失效
公开(公告)号：JPH0751511A
公开(公告)日：1995-02-28
申请号：JP21918893
申请日：1993-08-12
申请人： KURITA WATER IND LTD
发明人： TSURUMI TAKESHI
IPC分类号： B01D24/46 , B01D24/00 , B01D29/62 , B01D29/64 , B01D29/66
摘要： PURPOSE:To provide high cleaning efficiency while lowering the air use amount at the time of back washing of a filtering layer of a filtering apparatus. CONSTITUTION:A partitioning plate 8 which partitions the surface area of a water collecting plate into a plurality of sections 9-1, 9-2 is installed facing downward under the lower face of a lower part water collecting plate 2 which supports a filtering layer 3 on the upper face and an air supplying pipe 10-1, 10-2 for back washing is set for each section.

59. 发明专利

JPH0747371A TREATMENT OF FLUORIDE-CONTAINING WATER 失效
公开(公告)号：JPH0747371A
公开(公告)日：1995-02-21
申请号：JP19350993
申请日：1993-08-04
申请人： KURITA WATER IND LTD
发明人： TSURUMI TAKESHI , SATO TAKESHI
IPC分类号： C02F1/28 , B01D65/02 , C02F1/58 , C02F9/00
摘要： PURPOSE:To efficiently wash the membrane of an incorporated membrane separation device by bringing a fluoride ion adsorption material into contact with alkali, adding acid to a recovered waste liq. to produce fluoric acid, then reusing the waste liq. for washing a separation membrane. CONSTITUTION:The flow part high in fluorine concn. of the recovered waste liq. obtained in the case of the recovering treatment by bringing the fluoride ion adsorption material in a fluorine adsorption tower 7 into contact with the alkali such as NaOH is recovered into a storage tank 8 through a pipe 26. Then, when the performance of the separation membrane 3A of the membrane separation device 3 deteriorates, the operation of a treating system is stopped, and the recovered waste liq. in the storage tank 8 and the acid soln. in a storage tank 9 are mixed by the pipe 26 provided with a pump 35 and the pipe 27 provided with a pump 36, respectively to produce fluoric acid, and introduced to the separation device 3 through a pipe 28 and washed by dipping for a prescribed time. Then, after washing, the alkali soln. in a storage tank 10 is introduced to the separation device 3 through the pipe 29 and 28 provided with a pump 37 and washed by dipping for a prescribed time, then washed.

60. 发明专利

JPH0716564A TREATMENT OF EXHAUST GAS-DESULFURIZATION WASTEWATER 失效
公开(公告)号：JPH0716564A
公开(公告)日：1995-01-20
申请号：JP14615293
申请日：1993-06-17
申请人： KURITA WATER IND LTD
发明人： MURAKAMI TAKESHI , TSURUMI TAKESHI
IPC分类号： B01D53/34 , B01D53/50 , B01D53/77 , C02F1/42
摘要： PURPOSE:To obtain treated water of high quality by effectively removing heavy metal ions contained in the exhaust gas-desulfurization wastewater from a power plant by bringing the exhaust gas-desulfurization wastewater into contact with a chelate resin under a neutral pH condition. CONSTITUTION:The exhaust gas-desulfurization wastewater discharged from a power plant is supplied to a mixing tank 1 from a pipe 11 along with the return sludge from a sedimentation tank 2 and mixed with slaked lime supplied from a pipe 12, and the resulting mixture is supplied to the sedimentation tank 2 from a pipe 13 and subjected to solid-liquid separation. That is, fluorine in the wastewater is reacted with slaked lime and sedimented as CaF2 to be removed. A part of sedimented sludge based on CaF2 is returned to the mixing tank 1 to be reutilized while the supernatant water of the sedimentation tank 2 is supplied to a filter 5 by a pipe 16 and subjected to filtering treatment and the filtered water is sent to a resin tower 7 by a pipe 17 and passed through a chelate resin to adsorb and remove heavy metal ions of Zn, Ni or the like contained in the wastewater.

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