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    • 3. 发明专利
    • Method and apparatus for treating wastewater from coal gasifying
    • 从煤炭气化处理废水的方法和装置
    • JP2009022878A
    • 2009-02-05
    • JP2007188346
    • 2007-07-19
    • Electric Power Dev Co LtdKurita Water Ind Ltd栗田工業株式会社電源開発株式会社
    • TANITSU YOSHIKAZUMURAKAMI TAKAFUMINAKAHARA TOSHIJI
    • C02F1/74C02F1/42
    • PROBLEM TO BE SOLVED: To provide a treatment method of wastewater from coal gasifying which efficiently removes cyan, metals, a COD component or the like contained in gas washing wastewater produced in a coal gasifying process to obtain treated water of good quality, and to provide a treatment apparatus of wastewater from coal gasifying. SOLUTION: The treatment method of wastewater from coal gasifying is characterized in that the wastewater is brought into contact with a chelating resin to remove dissolved metals before being subjected to wet catalytic oxidation. The treatment apparatus of the wastewater has a chelating resin device for bringing the wastewater into contact with the chelating resin and a wet catalytic oxidation reactor for subjecting the outflow water of the chelating resin device to wet catalytic oxidation. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种煤气化废水的处理方法,其有效地除去在煤气化过程中产生的气洗废水中所含的青色,金属,COD成分等,以获得质量好的处理水, 并提供煤气化废水处理装置。 解决方案:煤气化废水处理方法的特点是在进行湿式催化氧化之前,废水与螯合树脂接触以除去溶解的金属。 废水处理装置具有使废水与螯合树脂接触的螯合树脂装置和用于对螯合树脂装置的流出水进行湿催化氧化的湿式催化氧化反应器。 版权所有(C)2009,JPO&INPIT
    • 8. 发明专利
    • METHOD FOR TREATING DRAIN FOR FLUE GAS DESULFURIZATION DEVICE
    • JPH1133351A
    • 1999-02-09
    • JP19543897
    • 1997-07-22
    • TOHOKU ELECTRIC POWER COKURITA WATER IND LTD
    • NIHONYANAGI TAMOTSUSAITO YUJINIHEI MIKIOMURAKAMI TAKAFUMI
    • B01D53/50B01D53/77C02F1/52
    • PROBLEM TO BE SOLVED: To reduce the consumption of a chemical to be used and a slug throughput by mixing an effluent from a dust removing column after the removal of fly ash with an effluent for an absorption column at a specific ratio, and treating the mixture into a flocculate through adding an alkali agent to adjust the mixture to a specific pH value and further, recovering a high-purity gypsum through solid/liquid separation treatment. SOLUTION: Effluent from a dust removing column 2 (drain from the dust removing column) is caused to pass through a fly ash removal/sedimentation tank 6 to perform the sedimentation/ separation of sludge. Next, an effluent from an a sorption column 1 (slurry for the absorption column) and the drain from the dust removing column 2 are mixed at a mixing ratio of 1:0.5-1:10 in a mixing tank 13. After that, this mixture is introduced into a reaction tank 14 together with part of a separated sludge from a second sedimentation tank 12 and an alkali agent is added to the mixture to adjust it to an pH value of 6-9. Consequently, sludge composed mainly of gypsum is flocculated from the mixture, so that this sludge is separated in a first sedimentation tank 15 and the separated water is partly returned to a desulfurization step, whilst the remainder is sent to a reaction tank 10, a flocculation tank 11 and the second sedimentation tank 12 in that order for treatment ad then calcium is removed form the separated water.
    • 9. 发明专利
    • TREATMENT OF ALUMINATE-CONTAINING WATER
    • JPH09253660A
    • 1997-09-30
    • JP6291996
    • 1996-03-19
    • KURITA WATER IND LTD
    • MURAKAMI TAKAFUMIKATO ISAMU
    • C02F1/58C02F1/66
    • PROBLEM TO BE SOLVED: To obtain highly conc. sludge excellent in dehydration properties by performing the neutralization of aluminate-containing water over at least two stages to treat high pH waste water containing aluminate. SOLUTION: Raw water (aluminate-containing water) is introduced into a first neutralizing tank 1 at first and H2 SO4 is added to raw water to perform first stage neutralization to neutralize free OH in waste water. The water flowing out of the first neutralizing tank 1 is subsequently introduced into a second neutralizing tank 2 and second stage neutralization is performed in the presence of return sludge from a sedimentation tank 4 by H2 SO4 . Herein, aluminate in waste water is neutralized to form A (OH)3 . The outflow water of the second neutralizing tank 2 is subsequently introduced into a flocculation tank 3 and a polymeric flocculant (polymer or the like) is added to the flocculation tank 3 to perform flocculation treatment. The liquid subjected to flocculation treatment in the flocculation tank 3 is subjected to sedimentation treatment in the sedimentation tank 4 and supernatant water is discharged out of the system as treated water. A part of separated sludge is returned to the second neutralizing tank 2 and the remainder thereof is discharged out of the system and dehydrated and dried to be supplied to an aluminum recovery process.
    • 10. 发明专利
    • TREATMENT OF FLUORIDE-CONTAINING WATER
    • JPH03118897A
    • 1991-05-21
    • JP25850889
    • 1989-10-03
    • KURITA WATER IND LTD
    • ICHIYANAGI NAOTOMURAKAMI TAKAFUMIKATO ISAMU
    • B01D61/16C02F1/28C02F1/44C02F1/52C02F1/58C02F9/00
    • PURPOSE:To stably and efficiently obtain treated water having high water quality with easy operation management and without problems in scale precipitation while dealing well with the fluctuation in the quality of raw water by adjusting the pH of the raw water to a specific value and adding at least a part of the concd. liquid discharged from a membrane separating stage of the ensuring stage and thereby executing reaction. CONSTITUTION:The raw water is supplied to a reactor 1 and the pH of the water is adjusted to 6 to 8 by adding a calcium compd. and/or aluminum compd. thereto. At least a part of the concd. liquid of a membrane sepn. treatment returned from a following membrane separator 3 is added to the water and the water is stirred. The suspension obtd. in this reactor 1 is introduced into a circulation tank 2. The suspension from the reactor 1 and a part of the concd. liquid of the membrane separator 3 in the circulation tank 2 are subjected to the membrane sepn. treatment by the separating membrane 3A of the membrane separator 3. The scale trouble is prevented in this way and the dealing with the fluctuation in the quality of the raw water is possible. The treated water having the high water quality is thus stably and efficiently obtd.