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61. 发明专利

JPH06148391A EQUIPMENT AND METHOD FOR TREATING LIQUID WASTE 失效
公开(公告)号：JPH06148391A
公开(公告)日：1994-05-27
申请号：JP29678892
申请日：1992-11-06
申请人： HITACHI LTD
发明人： YAMAGUCHI TETSUO , FUNABASHI KIYOMI , MIURA HIDEKAZU , HAYATA TAKASHI , SAWA TOSHIO , IZUMIDA TATSUO
IPC分类号： C02F1/04 , G21F9/08
摘要： PURPOSE:To conduct stable concentrating treatment without lowering an evaporating treatment function, by a method wherein a liquid to be treated is subjected to the concentrating treatment while it is made to circulate through an activated carbon tower provided in liquid waste treating equipment, and a surfactant in the liquid to be treated is kept at low concentration. CONSTITUTION:Liquid waste containing a surfactant is supplied from a storage tank 9 to an evaporator 5 and heated to a prescribed temperature while it is made to circulate by a heating circulation system 8. As nonvolatile constituents such as salinity of the liquid to be treated in the evaporator 5 are concentrated, the surfactant contained in the liquid is also concentrated. The surfactant in the liquid to be treated is concentrated by evaporation in an activated carbon tower 1 and removed by adsorption. A monitor of a UV meter 3 is provided at an outlet of a circulation system of the activated carbon tower and thereby the concentration of the surfactant in the liquid is measured.

62. 发明专利

JPH05192543A METHOD AND APPARATUS FOR REGENERATING MEMBRANE EVAPORATIVE CONCENTRATOR OF WASTE FLUID 失效
公开(公告)号：JPH05192543A
公开(公告)日：1993-08-03
申请号：JP818292
申请日：1992-01-21
申请人： HITACHI LTD
发明人： FUNABASHI KIYOMI , YAMAGUCHI TETSUO , MIURA HIDEKAZU , SAWA TOSHIO
IPC分类号： B01D61/36 , B01D65/06 , C02F1/04 , C02F1/44
摘要： PURPOSE:To obtain treated water of high purity by a method wherein the water pressure on the condensed water side of a membrane evaporative concentrator is kept higher than that on the waste fluid side thereof and the lowering of the formation amount of condensed water is detected to wash a hydrophobic porous membrane with chemicals and the washed membrane is dried to be regenerated. CONSTITUTION:A waste fluid is introduced into a tank 7 and cooling water is supplied to the cooling chamber 13 of a membrane evaporative concentrator 1 through a circulating system 3. The waste fluid in an evaporation chamber 12 has high temp. to generate evaporation and the generated steam is diffused through a hydrophobic porous membrane to be condensed in the cooling chamber 12. Therefore, the surfactant in the waste fluid is conc. on the surface of the membrane and the particles of the surfactant are settled into the membrane to make the membrane hydrophilic and the waste fluid penetrates in the membrane to become liquid flow. Since the pressure of the cooling chamber 13 is higher than that of the evaporation chamber 12 at this time, cooling water flows in the waste fluid. This inflow amount is increased by making the membrane hydrophilic and an evaporation speed decreases. A chemical agent such as hydrogen peroxide is sent to the cooling chamber 13 from a tank 9 to wash org. matter. Thereafter, a blower 10 is operated to dry the chemical solution remaining in the pores of the membrane 11 to remove the same.

63. 发明专利

JPH04346823A MEMBRANE METHOD AND DEVICE FOR EVAPORATING AND CONCENTRATING WASTE LIQUID 失效
公开(公告)号：JPH04346823A
公开(公告)日：1992-12-02
申请号：JP12086291
申请日：1991-05-27
申请人： HITACHI LTD
发明人： FUNABASHI KIYOMI , YAMAGUCHI TETSUO , KUROKAWA HIDEAKI , SAWA TOSHIO
IPC分类号： B01D61/36 , C02F1/04 , G21F9/08
摘要： PURPOSE:To prevent leak by simple operation and to obtain high purity treated water for a long time by keeping water pressure on the condensed water side of waste liquid treating device within a specific range and keeping the water pressure on the condensed water side higher than that on the waste liquid side. CONSTITUTION:When treating waste liquid by a membrane evaporating concentrator 1 equipped with an evaporating chamber 12 and a cooling chamber 13 separated by a hydrophobic porous membrane 11, water pressure in the cooling chamber 13 is kept in the range of 10 to 500KPa and water pressure in the cooling chamber 13 is kept higher than that in the evaporating chamber 12. When the waste liquid is evaporated, the vapor is diffused in a hydrophobic porous membrane 11 and condensed in the cooling chamber 13. And after sodium sulfate in the waste liquid is concentrated on the surface of the membrane 11 to deposit it in the membrane and the waste liquid enters the membrane 11, the waste liquid reaches the cooling chamber 13 to produce liquid flow. At that time, as water pressure in the evaporating chamber 12 is higher than that in the cooling chamber 13, sodium sulfate deposited in the membrane 11 is washed by cooling water flow to restore hydrophobic property of the membrane.

64. 发明专利

JPH04285897A REMOVING DEVICE FOR RADIOACTIVE GAS FROM OFF-GAS OF NUCLEAR FACILITY 失效
公开(公告)号：JPH04285897A
公开(公告)日：1992-10-09
申请号：JP4976891
申请日：1991-03-14
申请人： HITACHI LTD
发明人： FUNABASHI KIYOMI , NISHINO YOSHITAKA , YAMAGUCHI TETSUO , KUROKAWA HIDEAKI , MIURA HIDEKAZU , MATSUMOTO TAKAYUKI , SAWA TOSHIO
IPC分类号： G21F9/02 , G21F9/10
摘要： PURPOSE:To remove highly efficiently very small amount of radioactive gas in off-gas from a nuclear facility, such as CO2 gas, and to fix it. CONSTITUTION:In a module of bundled hydrophobic porous hollow fiber membranes or gas separation hollow fiber membranes, off gas flows inside the hollow fiber membranes and an absorption liquid (water solution of an NaOH) 4 circulates between outside of the hollow fiber membrane and a tank 5. A ax>-. in the off gas is absorbed into the absorption liquid via the hollow fiber, in a form of an Na2CO3. This absorption liquid is transfered from the tank 5 to a fixation tank 10 and a fixation liquid (water solution of BaCl2) 14 is added there, and thereby the Na2CO3 in the absorption liquid becomes deposition of a BaCO3. In case that the water solution of BaCl2 is used as the absorption liquid, there is no need to prepare the fixation tank 10 and the fixation liquid 14. Since the absorption liquid absorbs the CO2 in the off gas highly efficiently through chemical reaction, gaseous concentration of the CO2 goes down at a liquid side of the hollow fiber membranes and consequently dispersion in the hollow fiber membranes becomes quicker and high removing efficiency can be obtained.

65. 发明专利

JPH0331432B2 失效
公开(公告)号：JPH0331432B2
公开(公告)日：1991-05-07
申请号：JP22845684
申请日：1984-10-30
申请人： HITACHI LTD
发明人： YAMAGUCHI TETSUO , SAITO SETSUO , OTAHARA YOJI , ISHIDA MASAHIKO
IPC分类号： B01J8/20 , B01J10/00 , C12M1/36 , C12M1/40

66. 发明专利

JPH03106488A METHOD AND APPARATUS FOR TREATING WASTE LIQUID 失效
公开(公告)号：JPH03106488A
公开(公告)日：1991-05-07
申请号：JP24219289
申请日：1989-09-20
申请人： HITACHI LTD
发明人： YAMAGUCHI TETSUO , SAWA TOSHIO , KIKUCHI JUN
IPC分类号： B01D53/22 , B01D5/00 , B01D53/26 , C02F1/04
摘要： PURPOSE:To obtain a highly pure condensed water, reduce the corrosion of material and prevent the contamination of a membrane by a method wherein a waste liq. is evaporated under normal pressure and at a medium and low temp. without boiling, and the resulting vapor is passed through a hydrophobic porous membrane for recovery. CONSTITUTION:A noncondensable gas is brought into contact with a high temp. waste liq. in order to evaporate the waste liq., accompanied by vapor. In this manner the waste liq. can be evaporated under normal pressure and at a low and medium temp. Since a hydrophobic porous membrane is not used on the evaporating surface, there is also no problem of contaminating the membrane. The noncondensable gas accompanied by the aforesaid vapor is caused to contact with the hydrophobic porous membrane 20 provided parallel to the passage 18 of said gas so as to recover the vapor. Since the vapor alone is thus passed through the membrane to be condensed, while the droplets of the waste liq. accompanied by the noncondensable gas are not allowed to pass therethrough, a highly pure condensed water can be obtained. Furthermore, by producing a circulation of the noncondensable gas between the high temp. waste liq. and the hydrophobic porous membrane, the movement and diffusion of the vapor given off by the waste liq. can be accelerated without using decompression device.

67. 发明专利

JPH0368434A RADIATION RESISTANT POROUS POLYMER MEMBRANE AND MEMBRANE SEPARATING APPARATUS 失效
公开(公告)号：JPH0368434A
公开(公告)日：1991-03-25
申请号：JP20280889
申请日：1989-08-07
申请人： HITACHI LTD
发明人： NISHINO YOSHITAKA , YAMAGUCHI TETSUO , SAWA TOSHIO
IPC分类号： B01D61/36 , B01D53/22 , B01D61/14 , B01D67/00 , B01D71/82 , C02F1/44 , C08J3/24 , C08J7/00 , C08J9/36 , D01F6/00 , D06M15/00 , D06M101/00 , D06M101/16 , D06M101/18 , G21F9/06
摘要： PURPOSE:To prolong the service life of a porous polymer membrane by forming a porous layer contg. a polymer which is cross-linked by irradiation on the surface of a base material. CONSTITUTION:A structure composed of two or more layers is rendered to a porous polymer membrane. At least one of the layers contains a hydrophobic polymer such as PE, paraffin, polystyrene, nylon, PP or polymethyl acrylate and the membrane has 0.05-10.5kgf/cm bubble point and such a property that the Young's modulus decreases by -10 rad radiation. The reliability of the porous polymer membrane is enhanced and the service life is prolonged.

68. 发明专利

JPH02273183A PRODUCTION OF BIOCATALYST IMMOBILIZED POROUS GELATINIZED SUBSTANCE 失效
公开(公告)号：JPH02273183A
公开(公告)日：1990-11-07
申请号：JP7329190
申请日：1990-03-26
申请人： HITACHI LTD
发明人： ISHIDA MASAHIKO , YAMAGUCHI TETSUO , ISHIBASHI HITOSHI , KATSURAYAMA MASAKO , OTAHARA YOJI
IPC分类号： C12N11/04
摘要： PURPOSE:To raise mechanical strength of biocatalyst immobilized gelatinized substance by treating a mixture of gel base solution and biocatalyst, gelatinizing the mixture, cooling the gelatinized substance to freeze the solvent and further densifying the dried gelatinized substance under pressure. CONSTITUTION:A gel base solution is blended with a biocatalyst and the formed mixture is treated to prepare a gelatinized substance. The prepared gelatinized substance is cooled, a solvent in the gelatinized substance is frozen and the solidified solvent in the gelatinized substance is sublimated under reduced pressure and removed. Then a formed dried gelatinized substance is mechanically densified under pressure to produce a biocatalyst immobilized porous gelatinized substance. The dried biocatalyst immobilized and densified under pressure is preferably obtained by swelling. The mixture of the gel base solution and the biocatalyst is preferably gelatinized and made into granules.

69. 发明专利

JPS63214188A PRODUCTION OF AMINO ACID DECARBOXYLATION PRODUCT AND APPARATUS THEREFOR 失效
公开(公告)号：JPS63214188A
公开(公告)日：1988-09-06
申请号：JP4744787
申请日：1987-03-04
申请人： HITACHI LTD
发明人： ISHIDA MASAHIKO , YAMAGUCHI TETSUO , MUTSUKUSHI TOSHIKI , NISHIMURA YUSAKU , SAITO SETSUO
IPC分类号： C12P13/00 , C12M1/36 , C12M1/40 , C12P13/06
摘要： PURPOSE:To obtain an amino acid decarboxylation product useful as medicines in high purity and concentration, by adding immobilized amino acid decarboxylate to a raw material amino acid and reacting both within a suitable action pH region. CONSTITUTION:Immobilized particles of amino acid decarboxylase are introduced into a reaction vessel 5 and held therein and a raw material solution 1 of an amino acid, such as dibasic amino acid, is added through a raw material transfer pipe 3 and reacted until the pH attains =1wt.%. A slurry of the raw material amino acid in a concentration corresponding to the concentration of the product substance is then fed by a raw material transfer pump 4 drivably connected to a pH sensor 8 and pH automatic regulator 9 and a reaction solution 6 in an equal volume is taken out by a reaction solution transfer pipe 10 to carry out continuous operation. The resultant reaction solution is subsequently passed through a reaction solution concentrator 11 and dryer 13 to recover a monobasic amino acid which is a dried product 15.

70. 发明专利

JPS6018390B2 失效
公开(公告)号：JPS6018390B2
公开(公告)日：1985-05-10
申请号：JP633281
申请日：1981-01-21
申请人： HITACHI LTD
发明人： SHIMIZU NORIO , YAMAGUCHI TETSUO , SAITO SETSUO , UENO MASAO , OTAHARA YOJI
IPC分类号： C02F3/12 , C12M1/36 , C12N1/00

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