CN104611703A - Device and method for regenerating PCB etching waste liquid and recycling heavy metal - Google Patents
Device and method for regenerating PCB etching waste liquid and recycling heavy metal Download PDFInfo
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- CN104611703A CN104611703A CN201410824303.5A CN201410824303A CN104611703A CN 104611703 A CN104611703 A CN 104611703A CN 201410824303 A CN201410824303 A CN 201410824303A CN 104611703 A CN104611703 A CN 104611703A
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- 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
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Abstract
The invention discloses a device and a method for regenerating a PCB etching waste liquid and recycling heavy metals. Discharge holes of an etching liquid storage box and a back extraction liquid low-load transfer box are connected with an extraction box; a waste etching liquid discharge hole and a high-load etching liquid discharge hole of the extraction box are respectively connected with a reverse flow and etching liquid storage box and an acid water washing box body; the discharge hole of the acid water washing box body is connected with an extraction liquid low-load transfer box; a rotational flow electro-deposition device is connected with a diluted sulfuric acid storage box in a closed loop manner; the discharge hole of the extraction liquid low-load transfer box and the discharge hole of the diluted sulfuric acid storage box are connected with a back extraction box through a second circulation pump; a low-load extraction liquid discharge hole of a back extraction box and a diluted sulfuric acid solution discharge hole are respectively connected with the reverse flow and etching liquid storage box and the diluted sulfuric acid storage box. Purification and regeneration of the PCB etching waste liquid and recycling of high-quality electro deposited copper can be synchronously and integrally completed, no pollution can be caused, the operation is easy, and the equipment operation cost is low.
Description
Technical field
The present invention relates to PCB etching waste liquid regeneration field, especially PCB etching waste liquid regeneration and heavy metal collection system and recovery method.
Background technology
PCB etching solution (alkalescence, acid) is PCB industry is a kind of waste liquid making the generation of figure circuit, and its liquid component contains a large amount of ammoniacal liquor, ammonium chloride, cupric chloride etc., as directly discharge can cause great pollution to environment.
The existing method for PCB etching waste liquid regeneration, mainly contains following two kinds:
<1> Direct Electrolysis technology: it is carried out by etching solution diluting-add conducting salt-electrodeposition-adjustment solution-Footwall drift copper.This technology will constantly be diluted and adjust liquid, and in transfer and electrolytic deposition process, race can be caused unavoidably to emit leakage phenomenon, and require high to air draft, the more important thing is and need adopt liquefied ammonia adjustment, its danger coefficient is high, byproduct metallic copper low quality, after liquid regeneration, use properties can not meet production, does not meet the requirement of the fine and closely woven circuit of PCB.
<2> extraction-electrodeposition technology: adopt extraction liquid to mix with alkalescence or acidic etching waste liquid, thus form copper-bath by cupric ion back extraction to dilution heat of sulfuric acid.Due to extraction liquid not with etching solution generation chemical reaction, so the composition of former etching solution can not be destroyed.Then cupric ion is transferred in dilute sulphuric acid and forms copper sulfate liquid.Because this copper sulfate specific conductivity is high and stable, so reducing quality running cost basis also improving metallic copper.Traditional dull and stereotyped electrodeposition mode is when copper content is lower than 70 grams per liter, and its electrical efficiency can drop to 60%-70%, and with the generation of copper powder; When copper content is lower than 20 grams per liter, copper ion concentration difference increases, and electrical efficiency can be low to moderate 30%-40%, causes running cost obviously to increase like this.Even if cupric ion is higher than 70 grams per liters, electric current also can only give 160-200 ampere/m
2.Such equipment investment and running cost make some medium and small sized enterprises be difficult to bear.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, utilize extraction and eddy flow electrodeposition, a kind of PCB etching waste liquid regeneration and heavy metal collection system and recovery method are provided.
Technical solution of the present invention is:
PCB etching waste liquid regeneration and heavy metal collection system, comprise etching solution bin 1, extraction box 2, reextraction case 3, sour water tank-washer 4, the low load transferring box 5 of anti-stripping agent, extraction liquid high capacity transferring box 6, dilution heat of sulfuric acid bin 8, eddy flow electrowinning plant 7; The relief outlet of the low load transferring box 5 of described etching solution bin 1, anti-stripping agent is connected with extraction box 2, the etching solution waste liquid relief outlet of extraction box 2 is connected with acid-water washing casing 4 with etching solution bin 1 with high capacity etching solution relief outlet difference adverse current, acid-water washing casing 4 afterbody is connected with acid-water washing casing stem the first recycle pump 9, the relief outlet of acid-water washing casing 4 is connected with extraction liquid high capacity transferring box 6, and eddy flow electrowinning plant 7 is connected with dilute sulphuric acid bin 8 closed loop; Extraction liquid high capacity transferring box 6 relief outlet is connected with reextraction case 3 through the second recycle pump 10 with dilute sulphuric acid bin 8 relief outlet, and the low load extraction liquid relief outlet of reextraction case 3 is connected with dilute sulphuric acid bin 8 with the low load transferring box 5 of extraction liquid with dilution heat of sulfuric acid relief outlet difference adverse current.
PCB etching waste liquid regeneration and heavy metal collection method, comprise the following steps:
1, the etching waste liquor in etching solution bin 1 enters extraction box 2 with the low load liquid of extraction in the low load liquid 5 of extraction simultaneously, through stirring, mixing, layering after etching liquid waste liquid adverse current to etching solution bin 1, extract low load liquid and be converted into high capacity liquid, extraction liquid adverse current is to acid-water washing casing 4;
2, acid-water washing casing 4 afterbody is circulated to acid-water washing casing stem with the first recycle pump 9 and mixes with high capacity extraction liquid, and adverse current is to extraction liquid high capacity transferring box 6 after layering for high capacity extraction liquid, and acid-water washing remains on constantly circulation in self casing;
3, the extraction liquid high capacity transferring box 6 high capacity extraction liquid of discharging and dilute sulphuric acid bin 8 dilute sulfuric acid solution of discharging are delivered to reextraction case 3 through the second recycle pump 10 simultaneously, through stirring, mixing, layering, make former high capacity extraction liquid be converted to low load extraction liquid adverse current to the low load transferring box 5 of extraction liquid, dilution heat of sulfuric acid adverse current gets back to dilute sulphuric acid bin 8;
4, because dilute sulphuric acid carries cupric ion so generate copper-bath, eddy flow electrowinning plant 7 is opened and carries out circulation electrodeposition, and the low load extraction liquid in extraction liquid low load transferring box 5 is driven into extraction box 2 and works on.
The invention has the beneficial effects as follows:
1, after using this device, PCB etching waste liquor not only purifies, regenerates, and synchronously with reclaiming the electro deposited copper of high-quality integrally completes, and the operation of closed loop can not cause additional contamination.Etching solution after regeneration is satisfied with the requirement of high-density circuit board, and user adds not needing to buy the sub-liquid of etching again, really accomplishes zero release, significant for environment protection.
2, owing to adopting the technology mode combination of extraction, eddy flow electrodeposition comparative maturity, extracting system is synchronous with eddy flow electrowinning plant integrally connects work.More easy to operate and grasp in real work.Change for electrodeposition mode makes it electrodeposition efficiency on the basis of PCB etching waste liquor classic flat-plate electrodeposition and improves 4 times (classic flat-plate electric current gives 160-200 ampere/㎡, eddy flow electrodeposition gives 800-900 amperes of/㎡), so relative equipment cost also decreases, running cost is traditional 1/4, allows more middle-size and small-size PCB enterprise can bear.
3, numerous advantage such as etching solution, the electro deposited copper (99%) of high-quality, high efficiency operation, the technique of maturation, the equipment of low cost of regeneration is all energy-saving and emission-reduction, the important foundation turned waste into wealth.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention.
In figure: 1-etching waste liquor bin, 2-extraction box, 3-reextraction case, 4-sour water tank-washer, the low load transferring box of 5-anti-stripping agent, 6-extraction liquid high capacity transferring box, 7-eddy flow electrowinning plant, 8-dilution heat of sulfuric acid bin.
Embodiment
As shown in the figure, PCB etching waste liquid regeneration and heavy metal collection system, comprise etching solution bin 1, extraction box 2, reextraction case 3, sour water tank-washer 4, the low load transferring box 5 of anti-stripping agent, extraction liquid high capacity transferring box 6, dilution heat of sulfuric acid bin 8, eddy flow electrowinning plant 7; The relief outlet of the low load transferring box 5 of described etching solution bin 1, anti-stripping agent is connected with extraction box 2, the etching solution waste liquid relief outlet of extraction box 2 is connected with acid-water washing casing 4 with etching solution bin 1 with high capacity etching solution relief outlet difference adverse current, acid-water washing casing 4 afterbody is connected with acid-water washing casing stem the first recycle pump 9, the relief outlet of acid-water washing casing 4 is connected with extraction liquid high capacity transferring box 6, and eddy flow electrowinning plant 7 is connected with dilute sulphuric acid bin 8 closed loop; Extraction liquid high capacity transferring box 6 relief outlet is connected with reextraction case 3 through the second recycle pump 10 with dilute sulphuric acid bin 8 relief outlet, and the low load extraction liquid relief outlet of reextraction case 3 is connected with dilute sulphuric acid bin 8 with the low load transferring box 5 of extraction liquid with dilution heat of sulfuric acid relief outlet difference adverse current.
PCB etching waste liquid regeneration and heavy metal collection method, comprise the following steps:
1, the etching waste liquor in etching solution bin 1 enters extraction box 2 with the low load liquid of extraction in the low load liquid 5 of extraction simultaneously, through stirring, mixing, layering after etching liquid waste liquid adverse current to etching solution bin 1, extract low load liquid and be converted into high capacity liquid, extraction liquid adverse current is to acid-water washing casing 4;
2, acid-water washing casing 4 afterbody is circulated to acid-water washing casing stem with the first recycle pump 9 and mixes with high capacity extraction liquid, and adverse current is to extraction liquid high capacity transferring box 6 after layering for high capacity extraction liquid, and acid-water washing remains on constantly circulation in self casing;
3, the extraction liquid high capacity transferring box 6 high capacity extraction liquid of discharging and dilute sulphuric acid bin 8 dilute sulfuric acid solution of discharging are delivered to reextraction case 3 through the second recycle pump 10 simultaneously, through stirring, mixing, layering, make former high capacity extraction liquid be converted to low load extraction liquid adverse current to the low load transferring box 5 of extraction liquid, dilution heat of sulfuric acid adverse current gets back to dilute sulphuric acid bin 8;
4, because dilute sulphuric acid carries cupric ion so generate copper-bath, eddy flow electrowinning plant 7 is opened and carries out circulation electrodeposition, and the low load extraction liquid in extraction liquid low load transferring box 5 is driven into extraction box 2 and works on.
Claims (2)
1. PCB etching waste liquid regeneration and heavy metal collection system, is characterized in that: comprise etching solution bin, extraction box, reextraction case, sour water tank-washer, the low load transferring box of anti-stripping agent, extraction liquid high capacity transferring box, dilution heat of sulfuric acid bin, eddy flow electrowinning plant; The relief outlet of the low load transferring box of described etching solution bin, anti-stripping agent is connected with extraction box, the etching solution waste liquid relief outlet of extraction box is connected with acid-water washing casing with etching solution bin with high capacity etching solution relief outlet difference adverse current, acid-water washing casing afterbody is connected with acid-water washing casing stem the first recycle pump, the relief outlet of acid-water washing casing is connected with extraction liquid high capacity transferring box, and eddy flow electrowinning plant is connected with dilute sulphuric acid bin closed loop; Extraction liquid high capacity transferring box relief outlet is connected with reextraction case through the second recycle pump with dilute sulphuric acid bin relief outlet, and the low load extraction liquid relief outlet of reextraction case is connected with dilute sulphuric acid bin with the low load transferring box of extraction liquid with dilution heat of sulfuric acid relief outlet difference adverse current.
2.PCB etching waste liquid regeneration and heavy metal collection method, is characterized in that: comprise the following steps:
1) etching waste liquor, in etching solution bin 1 enters extraction box with the low load liquid of extraction in the low load liquid of extraction simultaneously, through stirring, mixing, layering after etching liquid waste liquid adverse current to etching solution bin 1, extract low load liquid and be converted into high capacity liquid, extraction liquid adverse current is to acid-water washing casing;
2), acid-water washing casing afterbody is circulated to acid-water washing casing stem with the first recycle pump and mixes with high capacity extraction liquid, and adverse current is to extraction liquid high capacity transferring box after layering for high capacity extraction liquid, and acid-water washing remains on constantly circulation in self casing;
3), the extraction liquid high capacity transferring box high capacity extraction liquid of discharging and the dilute sulphuric acid bin dilute sulfuric acid solution of discharging are delivered to reextraction case through the second recycle pump simultaneously, through stirring, mixing, layering, make former high capacity extraction liquid be converted to low load extraction liquid adverse current to the low load transferring box of extraction liquid, dilution heat of sulfuric acid adverse current gets back to dilute sulphuric acid bin;
4), due to dilute sulphuric acid carry cupric ion so generate copper-bath, eddy flow electrowinning plant is opened and carries out circulation electrodeposition, and the low load extraction liquid in extraction liquid low load transferring box is driven into extraction box and works on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410824303.5A CN104611703A (en) | 2014-12-26 | 2014-12-26 | Device and method for regenerating PCB etching waste liquid and recycling heavy metal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410824303.5A CN104611703A (en) | 2014-12-26 | 2014-12-26 | Device and method for regenerating PCB etching waste liquid and recycling heavy metal |
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| CN104611703A true CN104611703A (en) | 2015-05-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105603434A (en) * | 2016-03-20 | 2016-05-25 | 华南理工大学 | Method for recycling PCB (printed circuit board) acidic etching solution under photocatalytic actions |
| CN106191867A (en) * | 2016-08-25 | 2016-12-07 | 东莞市广华化工有限公司 | A kind of wiring board acidic etching waste liquid resource reusing method |
| CN107385470A (en) * | 2016-05-17 | 2017-11-24 | 陕西安信显像管循环处理应用有限公司 | Cupric spent etching solution recovery method |
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| JPH08311664A (en) * | 1995-05-12 | 1996-11-26 | Ain:Kk | Method for reutilizing waste liquid etchant |
| CN102251244A (en) * | 2011-07-13 | 2011-11-23 | 重庆浩康医药化工集团有限公司 | Cyclic regeneration and copper extraction process for printed circuit board etching waste solution |
| CN102418099A (en) * | 2011-12-12 | 2012-04-18 | 嘉兴科菲冶金科技股份有限公司 | Process for recovering copper by processing acidic copper chloride etchant through rotational flow electrolysis |
| CN103789769A (en) * | 2014-01-14 | 2014-05-14 | 无锡市瑞思科环保科技有限公司 | Method for recycling and regenerating PCB (Printed Circuit Board) acidic and alkaline etching waste liquid |
| CN204325503U (en) * | 2014-12-26 | 2015-05-13 | 锦州清源嘉华环保科技有限公司 | PCB etching waste liquid regeneration and heavy metal collection system |
-
2014
- 2014-12-26 CN CN201410824303.5A patent/CN104611703A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08311664A (en) * | 1995-05-12 | 1996-11-26 | Ain:Kk | Method for reutilizing waste liquid etchant |
| CN102251244A (en) * | 2011-07-13 | 2011-11-23 | 重庆浩康医药化工集团有限公司 | Cyclic regeneration and copper extraction process for printed circuit board etching waste solution |
| CN102418099A (en) * | 2011-12-12 | 2012-04-18 | 嘉兴科菲冶金科技股份有限公司 | Process for recovering copper by processing acidic copper chloride etchant through rotational flow electrolysis |
| CN103789769A (en) * | 2014-01-14 | 2014-05-14 | 无锡市瑞思科环保科技有限公司 | Method for recycling and regenerating PCB (Printed Circuit Board) acidic and alkaline etching waste liquid |
| CN204325503U (en) * | 2014-12-26 | 2015-05-13 | 锦州清源嘉华环保科技有限公司 | PCB etching waste liquid regeneration and heavy metal collection system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105603434A (en) * | 2016-03-20 | 2016-05-25 | 华南理工大学 | Method for recycling PCB (printed circuit board) acidic etching solution under photocatalytic actions |
| CN105603434B (en) * | 2016-03-20 | 2018-04-13 | 华南理工大学 | A kind of method of photocatalysis PCB acidic etching liquid recyclings |
| CN107385470A (en) * | 2016-05-17 | 2017-11-24 | 陕西安信显像管循环处理应用有限公司 | Cupric spent etching solution recovery method |
| CN106191867A (en) * | 2016-08-25 | 2016-12-07 | 东莞市广华化工有限公司 | A kind of wiring board acidic etching waste liquid resource reusing method |
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Application publication date: 20150513 |
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