WO2014024544A1 - 排液リサイクルシステム - Google Patents

排液リサイクルシステム Download PDF

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Publication number
WO2014024544A1
WO2014024544A1 PCT/JP2013/064610 JP2013064610W WO2014024544A1 WO 2014024544 A1 WO2014024544 A1 WO 2014024544A1 JP 2013064610 W JP2013064610 W JP 2013064610W WO 2014024544 A1 WO2014024544 A1 WO 2014024544A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
recycling system
chemical treatment
steam
drainage
Prior art date
Application number
PCT/JP2013/064610
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
弘行 正宗
一浩 平田
Original Assignee
本田技研工業株式会社
ナルコジャパン合同会社
株式会社片山化学工業研究所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 本田技研工業株式会社, ナルコジャパン合同会社, 株式会社片山化学工業研究所 filed Critical 本田技研工業株式会社
Priority to IN703DEN2015 priority Critical patent/IN2015DN00703A/en
Priority to CN201380041946.6A priority patent/CN104619653B/zh
Publication of WO2014024544A1 publication Critical patent/WO2014024544A1/ja

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/025—Reverse osmosis; Hyperfiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/14—Paint wastes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH

Definitions

  • the present invention relates to a drainage recycling system that purifies and reuses drainage generated in a painting process or the like.
  • FIG. 3 is a diagram showing the overall configuration of the current paint drainage treatment system.
  • industrial water pH: 6.5 to 7.5, chlorine: 15 ppm or less, conductivity: 110 ⁇ s / cm or less, Part of COD: 13.3 ppm or less
  • the cooling tower and the paint circulation tank is sent to the pure water device.
  • the water treated with this pure water device is used for pre-treatment water washing and electrodeposition water washing.
  • the water used for this pretreatment washing and electrodeposition washing is stocked in a paint drainage tank, pH is adjusted using hydrochloric acid and caustic soda, and then metal is adsorbed using calcium chloride and a polymer flocculant.
  • the sludge is divided into sludge and concentrated water. The sludge is treated for industrial waste and the concentrated water is returned to the stock tank.
  • the supernatant liquid that has been subjected to metal adsorption treatment is again adjusted to pH using hydrochloric acid and caustic soda, and then sent to a transfer tank.
  • the chlorine concentration of the water sent to the transfer tank is 2000-2500 ppm
  • the conductivity is 1000-5000 ⁇ s / cm
  • the COD is 100-150 ppm.
  • the wastewater is purified before it can be discharged into the river before being discharged. Not only does this purification cost a lot, it also wastes valuable water resources without recycling them.
  • Patent Document 1 has been proposed as a reusable system.
  • This patent document 1 discloses a wastewater reuse management system that adjusts the pH of clarified water that has been separated by a sedimentation device from the wastewater generated by the surface treatment, and converts the pH-adjusted water into a numerical value corresponding to each tank. It is disclosed that pH adjusted water is supplied at a pH of about 8.5 to 10.5 for washing after the alkaline degreasing tank, and is supplied at a pH of about 4 to 7 for washing after the acid treatment tank.
  • the main treatment is pH adjustment, and with this adjustment alone, the chlorine concentration, conductivity, and COD values remain unsuitable for reuse. Therefore, it is necessary to further improve the water quality by performing bio-treatment and the like, resulting in an increase in cost.
  • a drainage recycling system includes a drainage stock tank that stocks drainage, a first chemical treatment unit that adjusts the pH of the wastewater from the drainage stock tank, and the first chemical treatment unit.
  • the metal adsorbing part that adsorbs the metal in the wastewater whose pH is adjusted in step 2
  • the second chemical treatment part that adjusts the pH of the supernatant of the metal adsorption part
  • the wastewater whose pH is adjusted in the second chemical treatment part A reverse osmosis membrane device for separating the concentrated water into water for reuse and a drying device for separating the concentrated water into steam and sludge cake.
  • the drainage recycling system according to the present invention can be provided, for example, with a transfer tank to the coating circulation tank downstream of the second chemical treatment section, or a filter section using a filter or activated carbon. It is.
  • the water separated by the reverse osmosis membrane device is sent to the deionized water device in the same way as the current system, and is used as washing liquid for pre-coating water washing and electrodeposition water washing. Sent.
  • the drying device preferably includes, for example, a disk that rotates in a high temperature state, a nozzle that sprays the concentrated water onto the disk, and a scraper that scrapes off the sludge adhering to the surface of the disk.
  • the chlorine concentration can be reduced by replacing the oxidizing agent to be added from hydrochloric acid with dilute sulfuric acid in the first and second chemical treatment sections and replacing calcium chloride used in the metal adsorption section with slaked lime.
  • the chlorine concentration, conductivity, and COD are brought to the water quality level of industrial water while maintaining the pH within a predetermined range without incurring a large cost. be able to. Therefore, since it can be reused as it is, it is not discharged into the river, which is preferable in terms of cost and environmental sanitation.
  • wastewater / drainage is not discharged outside the factory, it is possible to design the final treatment equipment (coagulation sedimentation tank, biological treatment tank, etc.) compactly, It is also possible to greatly reduce the capital investment. Also, it is possible to reduce operating costs such as power and chemicals at final processing facilities.
  • final treatment equipment coagulation sedimentation tank, biological treatment tank, etc.
  • the paint drainage is recycled as an example, but the drainage is not limited to the paint drainage.
  • the drainage recycling system includes a drainage stock tank 1 for stocking the paint drainage used for cleaning in the painting process.
  • a first chemical treatment unit 2, a metal adsorption unit 3 and a second chemical treatment unit 4 are arranged downstream of the waste water stock tank 1 as primary treatment units for adjusting pH, removing SS, removing heavy metals, removing fluorine and removing oil. ing.
  • dilute sulfuric acid or caustic soda is used as a chemical for adjusting the pH.
  • hydrochloric acid is used instead of dilute sulfuric acid, but dilute sulfuric acid is used to lower the chlorine concentration.
  • the metal adsorbing unit 3 adsorbs and precipitates heavy metals using slaked lime and a polymer flocculant.
  • slaked lime Conventionally, calcium chloride is used instead of slaked lime, but slaked lime is used to lower the chlorine concentration.
  • Concentrated water containing heavy metals and the like is sent to a CD dryer 11 described later, and the supernatant is sent to the second chemical treatment unit 4 to adjust the pH again.
  • the water exiting the second chemical treatment unit 4 is transferred to a transfer tank 5 (relay tank), a part of the water in the transfer tank 5 is sent to a painting circulation tank, and the rest is a secondary that performs COD reduction and chlorine reduction. It is sent to the processing unit.
  • the secondary processing unit includes a first filter 6, an activated carbon layer 7, a second filter 8, and a reverse osmosis membrane device 9 (RO device).
  • the activated carbon layer 7 mainly reduces COD
  • the reverse osmosis membrane device 9 mainly reduces chlorine.
  • the treated water generated from the CD dryer can be recovered with a quality close to that of pure water, it can be recycled without using a RO (reverse osmosis membrane) device when used at the industrial water level.
  • RO reverse osmosis membrane
  • the reverse osmosis membrane device 9 is separated into concentrated water containing metal ions and water not containing these.
  • the quality of the water separated by the reverse osmosis membrane device 9 is pH: 6.5 to 7.5, chlorine concentration: 15 ppm or less, conductivity: 110 ⁇ s / cm or less, COD: 13.3 ppm or less. Water quality level. For this reason, the water which does not contain heavy metals separated by the reverse osmosis membrane device 9 is sent to the pure water device 10, where it is mixed with new industrial water and used for pre-coating water washing and electrodeposition water washing. In pre-treatment water washing, degreasing water and chemical conversion water washing are performed, and in electrodeposition water washing, dip water washing and post-water washing are performed.
  • the concentrated water from the reverse osmosis membrane device 9 is sent to the CD dryer 11.
  • a CD dryer is used as a drying device.
  • the CD dryer includes a rotating disk 12, a nozzle 13 that sprays the concentrated water onto the disk 12, and a scraper 14 that scrapes off the sludge adhering to the surface of the disk 12.
  • a circulation tank 15 with a weight scale is disposed below the rotating disk 12, and the concentrated water is fed into the circulation tank 15.
  • the concentrated liquid in the circulation tank 15 is sent to the nozzle 13 by a circulation pump 16.
  • high temperature steam is blown onto the surface of the disk 12, and the surface of the disk 12 is heated to about 120 ° C.
  • the scale of the CD dryer is large, it is possible to recycle steam, which is a heat source, by installing a steam recycling system, and energy costs and CO 2 can be reduced. Therefore, the concentrated water sprayed on the disk 12 is dried and adheres to the disk surface. This deposit (sludge) is scraped off by the scraper 14 and sent to the paint soot treating apparatus.
  • the steam that has exited the mist separator 19 is condensed by the condenser 20 and collected as condensed water, and the remaining steam is discharged from the exhaust fan.
  • the solid matter discharged from this recycling system treatment contains a lot of paint and synthetic resin discharged from the coating factory, and the waste oil treated in the same way is also thermally recycled as a fuel with a high calorie and a very low moisture content. Is possible.
  • the drainage recycling system according to the present invention can be applied not only to coating drainage but also to drainage generated in a factory.
  • SYMBOLS 1 Waste water stock tank, 2 ... 1st chemical

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Nanotechnology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Removal Of Specific Substances (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Water Treatment By Sorption (AREA)
PCT/JP2013/064610 2012-08-10 2013-05-27 排液リサイクルシステム WO2014024544A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
IN703DEN2015 IN2015DN00703A (enrdf_load_stackoverflow) 2012-08-10 2013-05-27
CN201380041946.6A CN104619653B (zh) 2012-08-10 2013-05-27 废液再利用系统

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-177654 2012-08-10
JP2012177654A JP5277419B1 (ja) 2012-08-10 2012-08-10 排液リサイクルシステム

Publications (1)

Publication Number Publication Date
WO2014024544A1 true WO2014024544A1 (ja) 2014-02-13

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ID=49179294

Family Applications (1)

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PCT/JP2013/064610 WO2014024544A1 (ja) 2012-08-10 2013-05-27 排液リサイクルシステム

Country Status (4)

Country Link
JP (1) JP5277419B1 (enrdf_load_stackoverflow)
CN (1) CN104619653B (enrdf_load_stackoverflow)
IN (1) IN2015DN00703A (enrdf_load_stackoverflow)
WO (1) WO2014024544A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6110921B1 (ja) * 2015-11-04 2017-04-05 株式会社荏原製作所 スラリー処理装置及びスラリー処理方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09324986A (ja) * 1996-06-04 1997-12-16 Nishimura Tekkosho:Kk 泥状物乾燥機
JP2001219176A (ja) * 2000-02-10 2001-08-14 Tokai Plant Eng Kk 水系塗料廃水の処理方法
JP2002285352A (ja) * 2001-03-27 2002-10-03 Nippon Paint Co Ltd 金属表面処理装置
JP2003326206A (ja) * 2002-05-09 2003-11-18 Toyota Motor Corp ディスク型塗料粕乾燥装置
JP2003326300A (ja) * 2002-05-09 2003-11-18 Toyota Motor Corp ディスク型乾燥装置を用いた塗料粕の乾燥方法および装置
JP2003340450A (ja) * 2002-05-30 2003-12-02 Toyota Motor Corp 重金属含有排水の処理方法および処理システム
JP2004016829A (ja) * 2002-06-12 2004-01-22 Parker Engineering Kk 塗装設備排水処理方法
JP2004160396A (ja) * 2002-11-14 2004-06-10 Japan Organo Co Ltd インク廃液の処理方法
JP2005000713A (ja) * 2003-06-09 2005-01-06 Japan Organo Co Ltd インク廃液の処理方法
JP2006220371A (ja) * 2005-02-10 2006-08-24 Nishimura Tekkosho:Kk 回転板式乾燥機

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4853559A (enrdf_load_stackoverflow) * 1971-11-05 1973-07-27
US20040026326A1 (en) * 2002-06-18 2004-02-12 Canon Kabushiki Kaisha Liquid treatment method and apparatus
CN101244876A (zh) * 2007-02-13 2008-08-20 三元金属株式会社 电镀预处理过程的废水处理装置及其处理方法
CN102092877B (zh) * 2011-01-05 2013-07-03 富毅特（上海）环保科技有限公司 废水综合回收利用系统
JP2012192331A (ja) * 2011-03-16 2012-10-11 Toyota Motor East Japan Inc 水性塗料廃液の処理方法

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09324986A (ja) * 1996-06-04 1997-12-16 Nishimura Tekkosho:Kk 泥状物乾燥機
JP2001219176A (ja) * 2000-02-10 2001-08-14 Tokai Plant Eng Kk 水系塗料廃水の処理方法
JP2002285352A (ja) * 2001-03-27 2002-10-03 Nippon Paint Co Ltd 金属表面処理装置
JP2003326206A (ja) * 2002-05-09 2003-11-18 Toyota Motor Corp ディスク型塗料粕乾燥装置
JP2003326300A (ja) * 2002-05-09 2003-11-18 Toyota Motor Corp ディスク型乾燥装置を用いた塗料粕の乾燥方法および装置
JP2003340450A (ja) * 2002-05-30 2003-12-02 Toyota Motor Corp 重金属含有排水の処理方法および処理システム
JP2004016829A (ja) * 2002-06-12 2004-01-22 Parker Engineering Kk 塗装設備排水処理方法
JP2004160396A (ja) * 2002-11-14 2004-06-10 Japan Organo Co Ltd インク廃液の処理方法
JP2005000713A (ja) * 2003-06-09 2005-01-06 Japan Organo Co Ltd インク廃液の処理方法
JP2006220371A (ja) * 2005-02-10 2006-08-24 Nishimura Tekkosho:Kk 回転板式乾燥機

Also Published As

Publication number Publication date
IN2015DN00703A (enrdf_load_stackoverflow) 2015-06-26
CN104619653B (zh) 2016-11-02
JP5277419B1 (ja) 2013-08-28
JP2014034017A (ja) 2014-02-24
CN104619653A (zh) 2015-05-13

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