WO2016184248A1 - Système de traitement de liquide de décapage à l'acide nitrique - Google Patents

Système de traitement de liquide de décapage à l'acide nitrique Download PDF

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Publication number
WO2016184248A1
WO2016184248A1 PCT/CN2016/077068 CN2016077068W WO2016184248A1 WO 2016184248 A1 WO2016184248 A1 WO 2016184248A1 CN 2016077068 W CN2016077068 W CN 2016077068W WO 2016184248 A1 WO2016184248 A1 WO 2016184248A1
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WO
WIPO (PCT)
Prior art keywords
nitric acid
treatment system
neutralization
deplating
water treatment
Prior art date
Application number
PCT/CN2016/077068
Other languages
English (en)
Chinese (zh)
Inventor
韦建敏
赵兴文
张晓蓓
张小波
Original Assignee
成都虹华环保科技股份有限公司
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
Priority claimed from CN201520331252.2U external-priority patent/CN204625418U/zh
Priority claimed from CN201510261751.3A external-priority patent/CN104843926A/zh
Application filed by 成都虹华环保科技股份有限公司 filed Critical 成都虹华环保科技股份有限公司
Publication of WO2016184248A1 publication Critical patent/WO2016184248A1/fr

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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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • 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

Definitions

  • the present invention relates to deplating water treatment, and in particular to a nitric acid deplating water treatment system.
  • Deplating water is a liquid used for deplating metal surface coating. It can be used for vacuum plating of metal, alloy, etc., such as aluminum plating, nickel plating, chrome plating, stainless steel, gold, etc., which needs to meet the detergency. Strong, low cost, no harm to the human body, stable drug, recyclable, no need to discharge Chinese medicine solution, add potion in appropriate proportion, and will not cause workpiece erosion.
  • the used deplated water contains some ions obtained after the chemical reaction, such as the ions of the plated metal and some anions in the original deionized water.
  • the deplated wastewater must be strictly treated to meet the requirements before it can be discharged. However, the risk of polluting the environment is increased, the burden of sewage treatment is increased, and industrial water consumption is increased.
  • the object of the present invention is to overcome the disadvantages of the prior art and to provide a nitric acid deplating water treatment system which has a simple structure and meets the requirements of sustainable production.
  • a nitric acid deplating water treatment system comprising a supply device, a vacuum distillation device, a neutralization adjustment device, a filtration device, an acid treatment device, and an electrolysis device, a filtration device
  • the invention comprises a filtrate separation device and a filter cake separation device, a supply device, a vacuum distillation device, a neutralization adjustment device, a filter cake separation device, an acid treatment device and an electrolysis device, which are sequentially connected according to a liquid circulation direction, and a neutralization adjustment device external filtrate separation device and Alkaline water addition device.
  • the vacuum distillation apparatus is externally connected to a nitric acid recovery unit.
  • the neutralization adjusting device is externally connected with an additive adding device.
  • a residual liquid storage device is disposed between the vacuum distillation apparatus and the neutralization adjustment device.
  • the filtrate separation device is externally connected to a wastewater treatment station.
  • the electrolysis device is externally connected to a sewage treatment station.
  • the neutralization adjusting device is provided with a pH detecting device.
  • the present invention has the following advantages:
  • the nitric acid recovery device is used to recover the nitric acid to avoid waste, and reduce the consumption of alkali in the subsequent production, saving resources and meeting the requirements of sustainable production;
  • the flow rate of the alkaline water can be controlled as needed, so that the neutralization reaction in the neutralization adjusting device can be performed well, and the situation that the acidity is too high or the alkalinity is too high is avoided;
  • the pH in the neutralization adjusting device can be detected, and the residual liquid can be added to the residual liquid storage device to improve the acidity or to control the addition of the alkaline water adding device.
  • Alkaline water to increase the alkalinity, so that the neutralization reaction can be carried out well and quickly;
  • the copper ions in the liquid can be reduced to copper metal and collected, thereby realizing the recovery of copper metal, thereby avoiding copper ion leakage and polluting the environment;
  • the external sewage treatment station and the filtrate separation device are connected to the external wastewater treatment station through the electrolysis device, thereby avoiding pollution caused by direct discharge of sewage and waste water into the natural environment, and further recycling and recycling of resources.
  • FIG. 1 is a schematic structural view of a nitric acid deplating water treatment system.
  • 1-supply device 2-distillation distillation device, 3-residual liquid storage device, 4-neutralization adjustment device, 5-alkaline water addition device, 6-filter cake separation device, 7-acid treatment Apparatus, 8-electrolytic unit, 9-sewage treatment station, 10-wastewater treatment station, 11-filtrate separation unit, 12-additive addition unit, 13-nitric acid recovery unit.
  • a nitric acid deplating water treatment system comprising a supply device 1, a vacuum distillation device 2, a neutralization adjustment device 4, a filtration device, an acid treatment device 7, and an electrolysis device 8, the present embodiment
  • the vacuum distillation unit 2 is externally connected to the nitric acid recovery unit 13
  • the filter unit includes a filtrate separation unit 11 and a filter cake separation unit 6 .
  • the filtrate separation unit 11 is externally connected to the wastewater treatment station 10 .
  • the electrolysis device 8 is externally connected to the sewage treatment station 9, and the supply device 1, the vacuum distillation device 2, the neutralization adjustment device 4, the filter cake separation device 6, the acid treatment device 7, and the electrolysis device 8 are sequentially connected in accordance with the liquid flow direction.
  • the residual liquid storage device 3 is disposed between the vacuum distillation device 2 and the neutralization adjustment device 4, and the neutralization adjustment device 4 is externally connected to the filtrate separation device 11 and the alkaline water addition device 5.
  • the neutralization adjusting device 4 is also provided with an additive adding device 12, and in the present embodiment, the neutralization adjusting device 4 is provided with a pH detecting device.
  • the working process of the present invention is as follows:
  • the stored or deuterated nitric acid deplating water is input into the system through the supply device 1, and the nitric acid deplating water is subjected to vacuum distillation treatment through the vacuum distillation device 2.
  • Nitric acid, and the nitric acid is recovered by the nitric acid recovery device 13 for reuse, and the residual liquid after the distillation treatment enters the residual liquid storage device 3, and the residual liquid storage device 3 controls the flow rate to enter the neutralization adjusting device 4, and is detected according to the pH detecting device.
  • the pH-controlled alkaline water adding device 5 adds a certain amount of alkali solution to the neutralization reaction of the residual liquid entering the neutralization adjusting device 4, and the additive adding device 12 adds a certain amount of the additive to the neutralization adjusting device 4 to promote the reaction.
  • the reaction rate is accelerated, and the liquid after the reaction is separated by the filtrate separation device 11 and the filter cake separation device 6 to separate the filtrate and the filter cake, and the filtrate is sent to the wastewater treatment station 10 for treatment, and the filter cake is sent to the acid treatment device 7 for acid.
  • the electrolysis device 8 is electrolyzed to reduce copper ions to copper metal for collection, and the electrolyzed liquid is sent to the sewage treatment station 9 for treatment.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

L'invention concerne un système de traitement de liquide de décapage à l'acide nitrique, comprenant un dispositif d'alimentation (1), un dispositif de distillation sous pression réduite (2), un dispositif de réglage de neutralisation (4), un dispositif de filtration, un dispositif de traitement d'acide (7) et un dispositif d'électrolyse (8), le dispositif de filtration comprenant un dispositif de séparation de filtrat (11) et un dispositif de séparation de gâteau de filtration (6) ; le dispositif d'alimentation (1), le dispositif de distillation sous pression réduite (2), le dispositif de réglage de neutralisation (4), le dispositif de séparation de gâteau de filtration (6), le dispositif de traitement d'acide (7) et le dispositif d'électrolyse (8) étant en communication dans l'ordre dans le sens de la circulation de liquide ; et le dispositif de réglage de neutralisation (4) étant raccordé de façon externe avec le dispositif de séparation de filtrat (11) et un dispositif d'ajout de liquide alcalin (5). Le système est utilisé pour le traitement d'un liquide de décapage à l'acide nitrique et permet de récupérer de l'acide nitrique, du cuivre, etc. de manière à éviter des gaspillages.
PCT/CN2016/077068 2015-05-21 2016-03-23 Système de traitement de liquide de décapage à l'acide nitrique WO2016184248A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201510261751.3 2015-05-21
CN201520331252.2U CN204625418U (zh) 2015-05-21 2015-05-21 一种硝酸退镀水处理系统
CN201510261751.3A CN104843926A (zh) 2015-05-21 2015-05-21 一种硝酸退镀水处理系统
CN201520331252.2 2015-05-21

Publications (1)

Publication Number Publication Date
WO2016184248A1 true WO2016184248A1 (fr) 2016-11-24

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PCT/CN2016/077068 WO2016184248A1 (fr) 2015-05-21 2016-03-23 Système de traitement de liquide de décapage à l'acide nitrique

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Country Link
WO (1) WO2016184248A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1078887A1 (fr) * 1999-08-19 2001-02-28 Koch Microelectronic Service Company, Inc. Procédé de traitement d'eaux usées contenant du cuivre et des particules CMP de cuivre
CN101942662A (zh) * 2010-09-29 2011-01-12 深圳市洁驰科技有限公司 一种硝酸退镀液再生方法及系统
CN102730891A (zh) * 2012-08-02 2012-10-17 华夏新资源有限公司 表面处理湿制程中硝酸的循环利用系统
CN102730892A (zh) * 2012-08-02 2012-10-17 华夏新资源有限公司 表面处理湿制程中硝酸的循环利用方法
CN104843926A (zh) * 2015-05-21 2015-08-19 成都虹华环保科技股份有限公司 一种硝酸退镀水处理系统
CN204625418U (zh) * 2015-05-21 2015-09-09 成都虹华环保科技股份有限公司 一种硝酸退镀水处理系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1078887A1 (fr) * 1999-08-19 2001-02-28 Koch Microelectronic Service Company, Inc. Procédé de traitement d'eaux usées contenant du cuivre et des particules CMP de cuivre
CN101942662A (zh) * 2010-09-29 2011-01-12 深圳市洁驰科技有限公司 一种硝酸退镀液再生方法及系统
CN102730891A (zh) * 2012-08-02 2012-10-17 华夏新资源有限公司 表面处理湿制程中硝酸的循环利用系统
CN102730892A (zh) * 2012-08-02 2012-10-17 华夏新资源有限公司 表面处理湿制程中硝酸的循环利用方法
CN104843926A (zh) * 2015-05-21 2015-08-19 成都虹华环保科技股份有限公司 一种硝酸退镀水处理系统
CN204625418U (zh) * 2015-05-21 2015-09-09 成都虹华环保科技股份有限公司 一种硝酸退镀水处理系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LIU, ZHENHAI ET AL.: "Recovery Process of Nitric Acid, Copper and Nickel in Deplating Wastewater", ENVIRONMENTAL SCIENCE, vol. 23, no. 02, 30 March 2002 (2002-03-30), ISSN: 0250-3301 *

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