KR20170136773A - Apparatus for recovering sexivalent chrome in chromiumplating washing water and method thereof - Google Patents

Apparatus for recovering sexivalent chrome in chromiumplating washing water and method thereof Download PDF

Info

Publication number
KR20170136773A
KR20170136773A KR1020160068709A KR20160068709A KR20170136773A KR 20170136773 A KR20170136773 A KR 20170136773A KR 1020160068709 A KR1020160068709 A KR 1020160068709A KR 20160068709 A KR20160068709 A KR 20160068709A KR 20170136773 A KR20170136773 A KR 20170136773A
Authority
KR
South Korea
Prior art keywords
water
tank
chromium
plating
recovering
Prior art date
Application number
KR1020160068709A
Other languages
Korean (ko)
Inventor
김홍식
Original Assignee
(주)한수산업
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 (주)한수산업 filed Critical (주)한수산업
Priority to KR1020160068709A priority Critical patent/KR20170136773A/en
Publication of KR20170136773A publication Critical patent/KR20170136773A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00—Obtaining refractory metals
    • C22B34/30—Obtaining chromium, molybdenum or tungsten
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/048—Purification of waste water by 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
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/62—Heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/04—Electroplating: Baths therefor from solutions of chromium
    • C25D3/08—Deposition of black chromium, e.g. hexavalent chromium, CrVI
    • 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
    • C02F2101/22—Chromium or chromium compounds, e.g. chromates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

According to the present invention, in an apparatus for treating plating washing water for recovering sexivalent chrome and a method for treating the same, turbid washing water of a chromium plating washing water tank is put into a buffer tank, and is filtered by a filter device to obtain filtered water. The filtered water is sent to the chromium plating washing water tank to be utilized as washing water. Moreover, concentrate is sent to a recovering water tank to be moored and pass through an overflow process several times to be precipitated. In addition, the concentrate in which sexivalent chrome is recovered is sent to an evaporation concentration device to evaporate and condense moisture to be added to washing water. In addition, the concentrate is stored in a plating liquid tank to be inputted into a chrome plating bath at an appropriate time to be utilized for chrome plating.

Description

크롬도금 수세수의 6가 크롬 회수장치와 그 방법{Apparatus for recovering sexivalent chrome in chromiumplating washing water and method thereof}FIELD OF THE INVENTION [0001] The present invention relates to a chromium-plated chromium recovery apparatus and a chromium-

본 발명은 크롬도금 후의 수세과정에서 수세조에 축적되는 6가 크롬을 회수하여 크롬도금에 사용하고 여과수는 크롬도금 수세수로 재활용함으로서 도금원가를 낮추고, 유해폐수의 무방류에 따른 하천수 오염방지 및 철저한 수질관리에 의한 도 금품질을 향상시키기 위한 크롬도금 수세공정의 6가 크롬 회수용 도금 수세수 처리장치와 그 처리방법에 관한 것이다.The present invention relates to a method for recovering hexavalent chromium accumulated in a water bath in a water washing process after chromium plating and used for chromium plating, and the filtered water is recycled as chrome plating water, thereby lowering the cost of plating and preventing contamination of river water due to discharge of harmful wastewater, The present invention relates to a chromium-plated water recovery process for recovering hexavalent chrome and a method for treating the same.

6가 크롬을 사용하는 크롬 도금공정 직후의 수세단계에 배치된 수세조에는 피도금물에 묻어 온 크롬이 축적되고, 크롬 축적량이 증가할수록 수세수는 혼탁해진다. 크롬 때문에 수세수의 생명이 단축되는 것이다. 그러므로 수세품질을 높이기 위해서는 주기적으로 수세수를 교체하지 않으면 도금품질을 보정하기 어렵다. 하지만 수세수 교체비용이 큰부담이다.In the water bath placed immediately after the chrome plating process using hexavalent chromium, the chromium accumulated in the object to be deposited accumulates. As the chromium accumulation amount increases, the water becomes turbid. Chrome will shorten the life of water. Therefore, it is difficult to calibrate the plating quality unless the washing water is periodically changed in order to improve the washing quality. However, the cost of replacing water is a big burden.

크롬이 함유된 폐수세수를 하천에 무단 방류하는 것은 환경오염문제를 야기하기 때문에 극력 자제해야 한다. 하지만 마땅한 처리방법이 없는다는 것이 문제의 심각성을 더한다. 또, 도금 경제적인 관점에서 크롬도금 수세수에 함유된 6가 크롬을 회수하여 재활용할 수 있다면 좋으련만 그럴만한 적절한 회수방안도 마련되어 있지 않다. 이러한 점에서 크롬도금공정 이후의 수세과정에서 그 수세조에 축적되는 크롬을 회수하여 재활용할 수 있는 대책과 수세수의 절수는 현실적으로 시급한 과제 중 하나로 볼 수 있다.Unreasonable discharge of chromium-containing wastewater into rivers should be avoided because it causes environmental pollution problems. However, the lack of proper treatment adds to the seriousness of the problem. In addition, from the viewpoint of plating economics, if the hexavalent chromium contained in the chromium plating water can be recovered and recycled, there is no adequate recovery method. In this respect, measures to recover and recycle the chromium accumulated in the water tank during the washing process after the chromium plating process and the water saving of the water tank can be regarded as urgent tasks.

본 발명은 크롬도금 수세조에 축적되는 6가 크롬을 회수하여 재활용하고 그 여과수는 크롬도금 수세수로 재활용함으로서 도금원가를 낮추고, 유해폐수의 무방류에 따른 하천수 오염방지, 그리고 철저한 수질관리에 의한 도금품질 향상에 기여 할 수 있는 크롬도금 수세공정의 6가 크롬 회수용 도금 수세수 처리장치와 그 처리방법을 제공하려는 것이다.The present invention recovers and recycles hexavalent chromium accumulated in a chrome-plated water tank and recycles the filtered water as chrome-plated water, thereby reducing the cost of plating, preventing river water contamination due to the discharge of harmful wastewater, And to provide a hexavalent chromium recovery plating water washing water treatment apparatus and a treatment method thereof which can contribute to quality improvement.

본 발명에 의한 6가 크롬 회수용 도금 수세수 처리장치와 그 처리방법은 크롬도금 수세조의 탁한 수세수를 버퍼탱크에 받아 놓고 여과장치로 여과하여 얻어지는 여과수는 크롬도금 수세조로 보내 수세수로 활용하고 농축액은 회수조로 보내 계류시키면서 몇 차례의 월류과정을 거치는 동안 침전되게 하여 6가 크롬을 회수하고, 6가 크롬이 회수된 농축액은 증발농축장치로 보내 수분은 증발 응집시켜 수세수에 보태고 농축액은 도금액조에 보관하다가 적절한 시기에 크롬도금조에 투입하여 크롬도금에 활용하는 것을 골자로 한다. In the apparatus for treating hexavalent chrome recovery water and the method for treating the same, the turbid water in the chromium plating water tank is received in a buffer tank, and the filtered water obtained by filtration is sent to a chromium plating water tank, And the concentrate is sent to the recovery tank and precipitated during the several overflow processes to recover the hexavalent chromium and the concentrated liquid recovered from the hexavalent chromium is sent to the evaporation concentrator to evaporate and coalesce the water, Is stored in a plating solution tank, and is put into a chromium plating tank at an appropriate time and utilized for chromium plating.

6가 크롬 회수용 도금 수세수 처리장치와 그 처리방법은 크롬도금 수세조의 탁한 수세수를 버퍼탱크에 받아 놓고 여과장치로 여과하여 얻어지는 여과수는 크롬도금 수세조로 보내 수세수로 활용하고 농축액은 회수조로 보내 계류시키면서 몇 차례의 월류과정을 거치는 동안 침전되게 하여 6가 크롬을 회수하고, 6가 크롬이 회수된 농축액은 증발농축장치로 보내 수분은 증발 응집시켜 수세수에 보태고 농축액은 도금액조에 보관하다가 적절한 시기에 크롬도금조에 투입하여 크롬도금에 활용The hexavalent chromium recovery plating solution and its treatment method are as follows: The turbid water in the chromium plating water bath is received in the buffer tank, and the filtered water obtained by filtration is sent to the chromium plating water tank to be used as wash water. The recovered hexavalent chromium is sent to the evaporation concentrator to evaporate and coalesce the water, and the concentrate is stored in the plating solution tank. And then put it into the chrome plating tank at an appropriate time and apply it to the chrome plating

이상 설명한대로 본 발명은 크롬도금 수세공정에서 크롬도금액 때문에 혼탁해진 수세수를 여과한 여과수를 크롬도금 수세수로 재활용하고 6가 크롬도 회수하여 크롬도금에 재활용할 수 있으므로 크롬도금 원가가 대폭 절감되며, 크롬 도금 수세수의 수질도 적정수준을 유지하도록 관리 가능하므로 도금품질을 높일 수 있다. 또, 크롬도금에 방해가 되는 금속이온, 금속염 등의 불순물을 제거할 수 있는 것도 크롬도금의 품질향상에 하나의 요인으로 작용한다.As described above, according to the present invention, in the chromium plating water-washing step, the filtered water filtered through turbid water can be recycled as chrome-plated water and recycled as chromium plating to recover the hexavalent chromium. And the quality of the chrome plating water can be controlled to maintain an appropriate level, so that the plating quality can be improved. In addition, the ability to remove impurities such as metal ions and metal salts, which interfere with chromium plating, also serves as one factor for improving the quality of chromium plating.

버퍼 탱크와 여과장치, 크롬회수조, 농축조, 증발농축장치, 및 도금액조로 구성된다. 크롬 피도금물의 수세공정에 수세조는 피도금물의 이행방향으로 적어도 2 이상의 수조가 일렬로 배치되어 있다. 수세조는 제1 수조와 제2 수조로 나타나 있는 데, 그 수가 증설될 수도 있다. 이 경우 제2 수조는 보충수가 조달되는 급수측이고, 수세수는 제2 수조에서 제1 수조로 넘어가게 된다. 따라서 크롬도금공 A buffer tank and a filtration device, a chrome recovery tank, a concentration tank, an evaporation concentration device, and a plating solution tank. At least two or more water tanks are arranged in a row in the water washing process of the chromium-plated material in the direction of movement of the object to be plated. The water tank is represented by the first tank and the second tank, and the number may be increased. In this case, the second water tank is the water supply side where the replenishing water is supplied, and the water washing water is transferred from the second water tank to the first water tank. Therefore,

정을 통과한 피도금물이 처음 세척되는 제1 수조의 오염도가 더 심하다. 그래서 처리대상물은 바로 제1 수조의 수세수이다.The contamination degree of the first tank is higher than that of the first tank. Therefore, the object to be treated is water in the first tank.

제1 수조에는 오버 플로우관을 설치한다. 오버 플러우관은 제1 수조의 혼탁한 수세수가 후술하는 버퍼탱크의 제1 계류조로 유입되도록 유도하는 도수관이다. 버퍼탱크는 혼탁해진 제1 수조의 수세수를 받아 계류시키면서 여과장치로 여과하여 농축시키고 그 여과수는 회수관을 통해 제2 수조로 보내는 것으로, 2 이상의 복수 계류조를 구비하여 수세수의 농축이 자연적으로 이뤄지게 한다. 여과장치는 버퍼탱크에 계류중인 수세수를 여과하고 그 여과수는 제2 수조로 회송되게 하는 것으로서, 음이온 교환수지와 양이온 교한수지를 내장하여 수세수 중에 함유된 이온화물질을 완전히 제거하게 된다. 크롬회수조는 버퍼탱크에서 배출되는 농축액을 여러 단계에 후속 회수조로 월류시키면서 침전되는 6가 크롬을 회수하기 위한 것으로, 복수의 회수조를 농축액이 흐르는 방향을 따라 일렬로 배치하고, 버퍼탱크의 배출구와 제1 회수조는 이송관으로 연결하며 제3 회수조와 농축조는 다른 이송관으로 연결한다. 그리고 각 이송관 상에는 펌프를 설치하여 앞과정의 농축액을 강제로 이송시킬 수 있게 한다.An overflow pipe is installed in the first tank. The overflow pipe is a water pipe for guiding the turbid water of the first water tank to flow into the first mooring tank of the buffer tank to be described later. The buffer tank is filtered and concentrated by filtration while receiving water from the turbid first tank, and the filtered water is sent to the second tank through a recovery pipe. The buffer tank is provided with two or more mooring tanks, . The filtration apparatus filters the poured water in the buffer tank and the filtered water is returned to the second water tank, and the anion exchange resin and the cation exchange water are integrated to completely remove the ionized substances contained in the water. The chrome recovery tank is for recovering the hexavalent chromium precipitated while allowing the concentrate discharged from the buffer tank to flow through the subsequent recovery tank at several stages. The plurality of recovery tanks are arranged in a line along the direction in which the concentrated liquid flows, The first water tank is connected to the transfer pipe, and the third water tank and the thickener tank are connected to each other through a transfer pipe. In addition, a pump is installed on each conveying pipe so that the concentrate of the previous process can be forcibly transferred.

농축조는 크롬회수조에서 6가 크롬이 회수된 후의 농축액을 받아 처리한계온도가 유지되도록 가열하여 응축시키는 것으로서, 응축시 발생하는 증기는 증발농축장치로 보내 후처리되게 하고 고농도의 농축액은 도금액조로 이송하여 저장하게 된다.The concentration tank receives the concentrated liquid after the recovery of the hexavalent chromium in the chromium recovery tank and heats the condensed liquid so as to maintain the processing limit temperature so that the vapor generated during the condensation is sent to the evaporation concentrator for subsequent treatment, and the concentrated liquid of high concentration is transferred to the plating liquid tank And stored.

증발농축장치는 농축조에서 발생하는 증기와 농축액을 분사하여 그 때 증발되는 수분은 냉각시켜 응집되는 응축수로 수세조용 수세수를 보충하게 되고 농축액은 농축조로 환송시키는 것으로서, 농축조와는 펌프가 설치된 이송관 및 농축액 환류관으로 연결되고 도금액조와는 펌프가 설치된 이송관으로 연결된다. 도금액조는 농축조에서 농축된 고농도의 도금액을 크롬도금조에 투입할 때까지 일시적으로 보관하는 것이다. 다음은 상기 크롬도금 수세수 처리장치를 이용하여 크롬도금 수세수에서 물과 공정액인 크롬 도금액을 분리하여 각각 재활용하는 요령과 6가 크롬을 회수하는 방법에 대하여 설명한다.The evaporation concentrator injects the steam and concentrate generated in the concentrator and cools the water evaporated at that time to replenish the wash water with the flocculated condensate and return the concentrate to the concentrator. And concentrate reflux tube, and the plating solution tank is connected to a transfer tube equipped with a pump. The plating solution tank is to temporarily store the plating solution concentrated in the concentration tank until the plating solution is introduced into the chromium plating tank. The following describes how to separately recycle the water and the chromium plating solution as the process liquid from the chrome-plated wash water using the chrome plating water-containing water treatment device, and how to recover the hexavalent chrome.

수세조의 제2 수조에서 물을 보충하여 제1 수조로 월류시키면서 제1,2 수조의 순으로 크롬으로 도금된 피도금물을 통과시켜 수세하는 과정에서 혼탁도가 가장 심한 제1 수조의 수세수는 오버 플로우관을 타고 버퍼탱크로 유입된다. 이렇게 유입된 수세수는 버퍼탱크에 계류되다가 여과장치에 의해 크롬도금에 방해가 되는 금속이온이 걸러지고 수세수는 농축되며, 이곳을 통과한 여과수는 제2 수조로 보내 피크롬 도금물의 크롬수세에 가담시킨다. 그리고 이러한 금속이온 여과에 따라 여과장치내의 이온교환수지에 누적되는 금속이온은 알맞은 시기에 회수하고 별도의 재생과정을 통해 재상하여 활용한다. 버퍼탱크의 농축액의 농도가 규정치를 웃돌 경우에는 그 농축액을 펌프로 퍼서 크롬회수조로 옮긴다. 크롬회수조에서는 이송돼 오는 버 퍼탱크의 농축액이 제1 내지 제3 회수조를 차례로 경유케 하여 침전되는 6가 크롬을 회수한다. 크롬회수조에서 6가 크롬의 회수가 이뤄진 후에는 펌프로 그 농축액을 퍼서 농축조로 옮기고 가열하여 농축시킨다. 농축조에서 가열된 농축액은 펌프로 증발농축장치로 보낸다. 증발농축장치로 유입되는 농축액은 거기에 내장된 노즐에서 분사되어 수분은 증발된 후 냉각되어 증류수로 바뀌고, 응축액은 농축조로 흘러든다. 증류수는 회수관을 통하여 수세조로 보내거나 분기관을 통해 크롬회수조로도 공급하여 크롬의 침전을 돕는다.In the process of replenishing water in the second tank of the water tank and passing it through the first tank to the first tank while passing the plating material plated with chrome in the order of the first tank and the second tank, Flows into the buffer tank through the overflow pipe. The water thus introduced is moored in the buffer tank, and the metal ions which interfere with the chromium plating are filtered by the filtration device, the water washing water is concentrated, and the filtered water passing through the filtration water is sent to the second water tank, Join. The metal ions accumulated in the ion exchange resin in the filtration device are recovered at the appropriate time according to the metal ion filtration and recycled through the separate regeneration process. If the concentration of the concentrate in the buffer tank exceeds the specified value, the concentrate is pumped and transferred to the chromium recovery tank. In the chromium recovery tank, the concentrate of the buffer tank transferred through the first to third recovery tank is recovered in order to precipitate the hexavalent chromium. After recovery of hexavalent chromium in the chromium recovery tank, the concentrate is pumped into a concentrator by a pump and heated to concentrate. The concentrate heated in the concentrator is pumped to the evaporator. The concentrate introduced into the evaporation concentrator is sprayed from the nozzle incorporated therein, and the water is evaporated, cooled and converted into distilled water, and the condensate flows into the concentrator. The distilled water is sent to the water tank through the recovery pipe or supplied to the chrome recovery tank through the branch pipe to help precipitate the chromium.

이러한 과정을 통하여 농축조에 고인 고농도 농축액이 일정량에 도달하면 펌프를 이용하여 도금액조에 저장한다. 그리고 증발농축장치에서 응집되는 응축수는 회수관을 통해 수세조로 보내서 후속 크롬도금 수세에 가담시킨다.Through this process, when the concentrate of high concentration concentrated in the concentration tank reaches a certain amount, it is stored in the plating liquid tank by the pump. Condensate condensed in the evaporation concentrator is sent to the water tank through the recovery pipe and added to the subsequent chrome plating water.

Claims (5)

복수의 수조로 편성된 크롬도금 수세조에서 혼탁도가 가장 높은 수조의 수세수를 받아 계류시키면서 예비적으로 농축시키는 버퍼탱크와; 버퍼탱크의 수세수를 여과하여 금속염, 금속이온을 제거하고 그 여과수는 수세조로 보내는 여과장치와;
버퍼탱크의 농축액을 건네받아 6가 크롬을 회수하는 크롬회수조와;
회수탱크의 농축액을 가열하여 농축시키는 농축조와;
상기 농축조의 농축액을 분사하여 증발되는 증기는 냉각하여 응축수로 변화시키고 농축액은 농축조로 보내는 증발농축장치와;
상기 농축조의 고농도 농축액을 저장하는 도금액조로 이루어진 것을 특징으로 하는 크롬도금 수세수용 6가 크롬 회수장치.A buffer tank for preliminarily concentrating water in a chromium plating water bath knitted with a plurality of water baths while taking water from the water bath having the highest turbidity; A filtration device for removing water from the buffer tank to remove metal salts and metal ions, and for sending the filtered water to the water tank;
A chromium recovery tank for recovering hexavalent chromium by passing a concentrate of the buffer tank;
A concentrating tank for heating and concentrating the concentrate of the recovery tank;
An evaporation concentrator for evaporating the evaporated vapor of the concentrator to cool the evaporated condensate and transferring the condensed liquid to the concentrator;
And a plating solution tank for storing a concentrated solution of the concentrated solution in the concentration tank. 제1항에 있어서, 여과장치는 음이온 교환수지와 양이온 교환수지내장형으로 하는 크롬도금 수세수용 6가 크롬 회수장치.The chromium-plated water-containing, hexavalent chrome recovery device according to claim 1, wherein the filtration device is an anion exchange resin and a cation exchange resin built-in type. 제1항에 있어서, 증발농축장치는 그 응축수를 환수관(h)으로 수세조로 보내도록 구성한 크롬도금 수세수의 6가 크롬 회수장치.The apparatus for recovering hexavalent chromium according to claim 1, wherein the evaporation concentrator is configured to send the condensed water to a water tank through a water return pipe (h). 복수의 수조로 편성된 크롬도금 수세조의 혼탁한 수세수를 받아 계류시키면서 예비적으로 응축시키는 수세수 저류단계와;
저류단계의 수세수를 여과하여 금속염과 금속이온이 제거된 여과수를 수세조로 보내는 여과단계와;
저류단계의 농축액에서 6가 크롬을 회수하는 단계와;
6가 크롬이 회수된 농축액을 가열하여 응축시키고 증발되는 수분은 냉각하여 응축시키는 증발응축단계와;
증발응축단계를 거쳐 얻어지는 응축액을 저장하는 단계를 거쳐 크롬도금 수세수에서 6가 크롬을 회수하는 방법.A water storage step of preliminarily condensing the turbid water of the chromium plating water tank knitted with a plurality of water tanks while mooring the water;
A filtration step of filtering the wash water in the storage step to send the metal salt and the filtered water removed from the metal ion to the water tank;
Recovering the hexavalent chromium in the concentrate of the storage step;
A step of evaporating and condensing the concentrated liquid recovered from the hexavalent chromium by heating and condensing the water evaporated by cooling;
And recovering the hexavalent chromium from the chromium plating water by way of the step of storing the condensate obtained through the evaporation condensation step. 제4항에 있어서, 증발은축단에서 응집되는 응축수를 수세조로 이송하는 단계를 더 가진 크롬도금 수세수에서 6가 크롬을 회수하는 방법.5. The method of claim 4, wherein the evaporation further comprises conveying the condensed water agglomerated at the shaft end to the water bath.
KR1020160068709A 2016-06-02 2016-06-02 Apparatus for recovering sexivalent chrome in chromiumplating washing water and method thereof KR20170136773A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160068709A KR20170136773A (en) 2016-06-02 2016-06-02 Apparatus for recovering sexivalent chrome in chromiumplating washing water and method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160068709A KR20170136773A (en) 2016-06-02 2016-06-02 Apparatus for recovering sexivalent chrome in chromiumplating washing water and method thereof

Publications (1)

Publication Number Publication Date
KR20170136773A true KR20170136773A (en) 2017-12-12

Family

ID=60943912

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160068709A KR20170136773A (en) 2016-06-02 2016-06-02 Apparatus for recovering sexivalent chrome in chromiumplating washing water and method thereof

Country Status (1)

Country Link
KR (1) KR20170136773A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115262040A (en) * 2020-12-25 2022-11-01 内蒙古双欣环保材料股份有限公司 Polyvinyl alcohol fiber strand mirabilite online recovery device and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115262040A (en) * 2020-12-25 2022-11-01 内蒙古双欣环保材料股份有限公司 Polyvinyl alcohol fiber strand mirabilite online recovery device and method

Similar Documents

Publication Publication Date Title
CN104903256A (en) Water treatment process
CN106565045A (en) Complete equipment for stainless steel pickling wastewater treatment and resource recycling and treatment process
CN107235600B (en) Electroplating wastewater treatment method, treatment system and application
CN105330059A (en) Electroplating wastewater zero discharging treatment process
CN203878018U (en) Desulfurization wastewater recycling and zero-discharge system
CN103011482B (en) Resource utilization method of acid wastewater
WO2001014256A1 (en) A salt water desalination process using ion selective membranes
KR20110120427A (en) System and method for eliminating ammonia nitrogen from wastewater
CN101172724A (en) Method for processing sewage from industrial cycle water
CN105399260A (en) A reusing treatment method for regenerated waste water of power plant condensate fine treatment
CN105236627A (en) Papermaking tail water/recycled water reusing zero-discharge processing method
CN105198141A (en) High-temperature high-salinity wastewater zero-discharging method
RU2330902C2 (en) Method and facility for regeneration of solutions which are used for etching of metals
JP2005539196A (en) Method and system for heat transfer
CN101906653B (en) Internal-circulating plating technology and special combined equipment
CN101575119B (en) Method for recovering chromic acid and water from chromeplating rinse water
KR20170136773A (en) Apparatus for recovering sexivalent chrome in chromiumplating washing water and method thereof
CN112850948A (en) Electroplating wastewater treatment method and system
CN110143710A (en) Formation foil production line Sewage treatment utilizes method
CN101244876A (en) Apparatus for treating waste water for plating preprocessing process and processing method
KR100509250B1 (en) Apparatus for recovering sexivalent chrome in chromium plating washing water and method thereof
CN106542680A (en) A kind of method of wastewater treatment of environmental protection electrophoretic paint production
CN100386475C (en) Water comprehensive utilization technology for cleaning electroplating nickel
CN111661886A (en) MVR evaporation salt separation system
CN107540139B (en) Recycling treatment system and method for cold rolling wastewater ion exchange strong brine