CN208087748U - Two-component acidity etching liquid recycling device - Google Patents
Two-component acidity etching liquid recycling device Download PDFInfo
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- CN208087748U CN208087748U CN201820186337.XU CN201820186337U CN208087748U CN 208087748 U CN208087748 U CN 208087748U CN 201820186337 U CN201820186337 U CN 201820186337U CN 208087748 U CN208087748 U CN 208087748U
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- etching
- accumulator tank
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- ammonium chloride
- liquid recycling
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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 utility model provides a kind of two-component acidity etching liquid recycling device, including etching waste liquor accumulator tank, diaphragm cell, regenerated liquid accumulator tank, water-vapor mixer, circulating slot and hydrochloric acid feedway, the two-component acidity etching liquid recycling device further includes ammonium chloride feedway, which includes ammonium chloride accumulator tank, the pump housing and pipeline.The existing Diaphragm Electrolysis Technology etching solution of the technology effective solution needs to add in cyclic process a large amount of hydrochloric acid, the expansion of etching solution water volume, can not 100% cycling and reutilization technical barrier.
Description
Technical field
Patent of the present invention is suitable for printed wiring board acidic etching liquid reclaiming technical field more particularly to double groups a kind of
Part acidity etching liquid recycling device.
Background technology
World PCB industry production value accounts for a quarter of the electronic component industry gross output value or more, is each electronic component subdivision
The maximum industry of proportion in industry, industry size is up to 40,000,000,000 dollars.Simultaneously as its in basic electronic industry uniquely
Position, has become most active industry in contemporary electronic element industry.
Etching is as the important process in PCB processing procedures, and lateral erosion is small, rate is easily controllable and easy because having for acidic etching liquid
The features such as regeneration, is widely used.In etching process, Cu2+It is acted on Cu and generates Cu+, with the progress of etching reaction, Cu+
Quantity is more and more, Cu2+It reduces, etching solution etch capabilities decline quickly, and to keep stablizing etch capabilities, oxidant, which need to be added, to be made
Cu+It is converted into Cu as early as possible2+；Simultaneously as Cu in etching cylinder2+When concentration reaches certain numerical value or the solution of etching cylinder is more than certain
When volume, need timely exclusive segment etching solution to ensure the normal operation of etching work procedure, which is referred to as to etch
Waste liquid.Since etching work procedure will keep the negative pressure of etching machines, etching line to need to be equipped with exhaust equipment, hydrochloric acid belongs to volatile
Acid can lose a part with exhausting.The etching solution of usual 1000L, the etching waste liquor come by etching work procedure exclusion
There are 850-900L or so, volumetric wear about 10-15% or so, but due to having dissolved copper ion, copper ion inside etching solution
The total weight of about 10-12% or so, etching solution are approximately equivalent before and after etching work procedure.
The traditional processing method of acidic etching waste liquid is chemical method, and by adding alkali neutralization, the copper ion in waste liquid is recycled,
Waste liquid after neutralization must discharge.
It is most of to replace it using the method for circular regeneration in order to reduce environmental pollution and reach certain economic benefit
Preceding directly to handle the method for recycling copper, the method for regeneration cycle mainly has as follows at present：
1, electrodeposition process is extracted：This method mixes acidic etching waste liquid and extractant, makes extractant will be in etching solution
Copper ion extract, copper-bath is obtained after sulfuric acid is stripped, elemental copper is obtained after electrolysis, and after being lowered copper ion
The formulated return etching line of etching solution use.The method need to could be extracted in extraction with ammonium hydroxide adjusting pH value to 1-2, and sour
Property extractant extracting power it is excessively poor, copper ion reduces slow, entrainment extractant is easy in etching solution, in the process medicine for adjusting pH value
Water meeting increment, and the disadvantages such as oxidant can not be provided.
2, electrolysis with ion-exchange film method of reproduction：The method is so that cathode is spaced with anode with anionic membrane, using electrolysis when from
The principle of son migration makes chloride ion transport to anode, and anolyte is recycled with etching cylinder reaches cuprous oxide ion to regenerate.But
The method energy consumption during electrolytic regeneration is big, the of high cost and cracky of ionic membrane, when ionic membrane breakage, anolyte and
Catholyte will mix, and lack of proper care so as to cause etching solution ingredient, eventually leading to liquid medicine can not cycling and reutilization.
3, oxalate precipitation method：The method is to react oxalic acid with the copper ion in acidic etching liquid, after reducing copper ion
Etching solution reuse.But the method can only recycle hydrochloric acid, improve the molar concentration of hydrochloric acid, can not regenerated acidic etching needed for oxygen
Agent, be easy after Reusability can increment and impurity increase.
4, diaphragm process：It is precipitated in cathode by the copper ion in etching solution by diaphragm electrolysis, obtains tough cathode, anode
It generates chlorine leach and is back to production line in etching solution.But etching solution is especially losing during recycling
Production process is carved since etching line will keep negative pressure, it is necessary to there is exhausting, hydrochloric acid constantly to volatilize during etching, be electrolysed simultaneously
Process will also result in the loss of chlorion.To keep the concentration of hydrochloric acid of etching solution, it is necessary to hydrochloric acid is quantitatively added, but it is industrial
The concentration of the hydrochloric acid used generally only has 30-31%, when hydrochloric acid additive amount is big, the etching solution volume meeting of the entire circulatory system
It is continuously increased, current Diaphragm Electrolysis Technology extracts one ton of copper and needs to add about 4-6 tons or so of hydrochloric acid, additive amount big in this way
It is far longer than volumetric wear amount (about 10-15%) of the etching solution in etching work procedure, when recycling a period of time in system
Etching solution will exceed the storage capacity of system, it is necessary to which outer row, this results in etching solution can not 100% cycling and reutilization.Actually
The reclamation rate of the diaphragm electrolysis technique etching solution used currently on the market generally only has 40-50% reclamation rates, and there is a large amount of
Outer row, entire technology are very immature.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of two-component acidity etching liquid recycling device, solution
It certainly when existing diaphragm process reclaiming etching waste liquor, needs to add a large amount of hydrochloric acid, the skill for causing etching solution water volume to expand
Art problem.
The utility model is realized in this way
A kind of two-component acidity etching liquid recycling device, including etching waste liquor accumulator tank, diaphragm cell, regenerated liquid
Accumulator tank, water-vapor mixer, circulating slot and hydrochloric acid feedway, the diaphragm cell include cathodic region and anode region, the etching
Waste liquid accumulator tank is connected with the diaphragm cell, the etching waste liquor for storing etching producing line, and is provided to diaphragm cell, should
Regenerated liquid accumulator tank is connected with the diaphragm cell and circulating slot respectively, and the regeneration etching solution for storing diaphragm cell simultaneously carries
It is supplied to circulating slot, for the chlorine of electrolytic cell to be directed into the circulating slot, which is used for this again the water-vapor mixer
Raw etching solution is provided to etching production line, which further includes ammonium chloride feedway,
The ammonium chloride feedway includes ammonium chloride accumulator tank, the pump housing and pipeline.
The utility model two-component acidity etching liquid recycling device, by passing through on the basis of original diaphragm electrolysis
A certain amount of ammonium chloride, chlorine is added on the basis of traditional two-component acidic etching liquid (hydrochloric acid/sodium chlorate, hydrochloric acid/hydrogen peroxide)
Ion is oxidized to free chlorine on anode, formation " Active Chlorine " in aqueous solution is then dissolved in, as strong oxidizer and ammonia nitrogen
Reaction generates nitrogen and is discharged into air, and hydrochloric acid is produced in solution, to reduce the hydrochloric acid additive amount of system, technology extraction one
Hydrochloric acid to be added needed for ton copper is that 30% of additive amount needed for the technology of existing diaphragm electrolysis is left about at 1-1.5 tons or so
The right side, such a additive amount is just equal with volumetric wear amount of the etching solution in etching work procedure, makes etching solution continuous
Cycling and reutilization during keep a dynamic equilibrium.
The existing Diaphragm Electrolysis Technology etching solution of the technology effective solution needs to add a large amount of hydrochloric acid in cyclic process, erosion
Carve liquid water volume expansion, can not 100% cycling and reutilization technical barrier.
Description of the drawings
Fig. 1 is the schematic diagram of the utility model two-component acidity etching liquid recycling device.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
The utility model embodiment provides a kind of two-component acidity etching liquid recycling device, and it is aobvious to please refer to Fig.1 Fig. 1
Show the structure of the utility model two-component acidity etching liquid recycling device, a kind of two-component acidity etching liquid recycling dress
It sets, including etching waste liquor accumulator tank 1, diaphragm cell 2, regenerated liquid accumulator tank 3, water-vapor mixer 4, circulating slot 5 and hydrochloric acid supply
To device 6, which includes cathodic region 21 and anode region 22, the etching waste liquor accumulator tank 1 and 2 slot of diaphragm electrolysis
Be connected, for store the etching waste liquor for etching producing line, and be provided to diaphragm cell 2, the regenerated liquid accumulator tank 3 respectively with this every
Membrane electrolysis cells 2 are connected with circulating slot 5, and the regeneration etching solution for storing diaphragm cell 2 is simultaneously provided to circulating slot 5, the steam
Mixer 4 is for the chlorine of diaphragm cell 2 to be directed into the circulating slot 5, and the circulating slot 5 is for putting forward the regeneration etching solution
It is supplied to etching production line, which further includes ammonium chloride feedway 7, the ammonium chloride 7
Feedway includes ammonium chloride accumulator tank 71, the pump housing 72 and pipeline 73.
Two-component etching solution includes mainly hydrochloric acid/sodium chlorate, hydrochloric acid/hydrogen peroxide system and copper chloride, utilizes copper chloride
Oxidisability reacts with elemental copper, to make the layers of copper on circuit board be corroded.The two-component acid etching of the utility model
Liquid cyclic regeneration device on the basis of traditional two-component acidic etching liquid (hydrochloric acid/sodium chlorate, hydrochloric acid/hydrogen peroxide) by being added
A certain amount of ammonium chloride, chlorion are oxidized to free chlorine in anode region, are then dissolved in formation " Active Chlorine " in aqueous solution,
Reacted with ammonia nitrogen as strong oxidizer and generate nitrogen, nitrogen is discharged to exhausting in air, forms hydrogen ion in solution, hydrogen from
Son is coordinated with chlorine in solution, produces hydrochloric acid, and reaction equation is as follows：
2Cl-→Cl2+2e-
Cl2+H2O→HOCl+H++Cl-
2NH4 ++3HOCl→N2+3H2O+5H++3Cl-
It is reformed by the technology, due to there is a large amount of hydrochloric acid to generate in reaction, whole system erosion can be reduced
The additive amount for carving hydrochloric acid in liquid cyclic process makes the component of etching solution in system keep a dynamic equilibrium, and medicine liquid volume will not
Expansion.
Specifically, which is connected with the etching waste liquor accumulator tank 1, and ammonium chloride is provided to the erosion
Carve waste liquid accumulator tank 1.
By the way that ammonium chloride feedway is connected with etching waste liquor accumulator tank, ammonium chloride is added into etching waste liquor, is led to
It crosses and etching waste liquor is delivered to after electrolytic cell is electrolysed, directly play ammonium chloride effect, hence it is evident that improve the generation efficiency of hydrochloric acid.
Specifically, in another embodiment, which is connected with the regenerated liquid accumulator tank, by ammonium chloride
It is provided to the regenerated liquid accumulator tank.Further, the addition of ammonium chloride can obtain saturation chlorination by chloride leach in water
Then ammonium salt solution is then added in etching waste liquor bucket, regenerated liquid accumulator tank, circulating slot, producing line etching cylinder, preferably etching waste liquor liquid
It is added in accumulator tank.
Specifically, it is provided with regenerated liquid overflow launder 8 between the diaphragm cell 2 and the regenerated liquid accumulator tank 3.Diaphragm
The etching solution overflow after copper ion is reduced in electrolytic cell, after cell reaction enters etching solution overflow launder 8.
Specifically, further include pipeline fan, the air inlet of the pipeline fan is connected with the exhaust outlet of the anode region, and with
The air inlet of water-vapor mixer is connected, and water-vapor mixer is connected with circulating slot, and circulating slot is communicated and recycled with production line etching cylinder.
Specifically, cathode plate 23 is set in the cathodic region, and the cathode plate 23 is connected with the cathode of DC power supply, described the moon
The material of pole plate is Titanium, and the cathode plate surface is free of coating.
Specifically, which is equipped with anode plate 24, and the anode of the anode plate 24 and DC power supply is connected, the anode
The material of plate is Titanium, and metal coating is contained on the anode plate surface layer.
Specifically, which includes multiple cathodic regions.
Printed wiring board acidic etching liquid a hundred percent recycle utilization and device further include an exhaust-gas treatment dress
It sets, which is connected with the exhaust outlet of cathodic region, etching solution overflow cylinder, etching solution circulating slot respectively, collects cloudy
Exhaust gas (chlorine and hydrogen chloride) in polar region, etching solution overflow cylinder, etching solution circulating slot, in emission-control equipment, including one
A lye feeding mechanism, the highly basic liquid supply unit provide aqueous slkali, and neutralization reaction is carried out using strong base solution and above-mentioned exhaust gas,
To realize the qualified discharge of exhaust gas.And the lye feeding mechanism is aqueous alkali spray equipment.There is no limit Ke Yiwei for aqueous slkali
Sodium hydroxide etc..
The anti-corrosion pipeline wind turbine and water-vapor mixer of the regenerating unit of patent of the present invention ensure that the chlorine that electrolysis generates is not straight
Run in and put but be back in production line etching cylinder, on the one hand improves the utilization rate of chlorine, on the other hand decrease exhaust gas
Discharge capacity, reduce environmental pollution.
The emission-control equipment of patent regenerative system of the present invention, the exhaust gas such as chlorine, hydrogen chloride that this regenerative system is generated
Gas is neutralized, and ensure that the zero-emission of exhaust gas, realizes the requirement of environmental protection.
The utility model two-component acidity etching liquid recycling device, etching waste liquor accumulator tank 1 and production line etch cylinder
11 are connected, the etching waste liquor in storage production line etching cylinder, and by the etching waste liquor by being provided under waste liquid pumping action
In cathodic region.Reduction reaction occurs in cathodic region for etching waste liquor under the action of electric current, and copper ion is reduced into elemental copper,
The etching solution overflow after copper ion is reduced to enter in etching solution overflow cylinder, when etching solution overflow cylinder reaches high liquid level, regenerated liquid
Etching regenerated liquid is pumped into regenerated liquid accumulator tank by pump startup；And equally under the action of electric current etching solution in above-mentioned anode region
Oxidation reaction occurs, will produce chlorine in anode region, the chlorine of generation is admitted to by anti-corrosion pipeline wind turbine in water-vapor mixer,
Chlorine reacts in water-vapor mixer with the univalent copper ion in etching solution.Etching solution in etch cycle slot is due to constantly there is chlorine
Gas dissolves in the rising of its ORP oxidation-reduction potential, and etching solution has new activity again, is sent to production line recycling.Work as etching
Constantly by use, the copper ion in solution is continuously increased, proportion rises liquid medicine, when proportion reaches maximum limit, regenerated liquid
Pump startup is added, the regenerated liquid in regenerated liquid accumulator tank is added in etching solution circulating slot.
Simple substance is precipitated in cathode using diaphragm electrolysis principle in the utility model two-component acidity etching liquid recycling device
Copper is added one in technical process on the basis of original two-component acidic etching liquid (hydrochloric acid/sodium chlorate, hydrochloric acid/hydrogen peroxide)
Quantitative ammonium chloride, during electrolysis, ammonium ion is oxidized to nitrogen and is discharged in air ammonium chloride, is generated in solution
Hydrochloric acid makes system Chinese medicine water inventory be in a dynamic equilibrium to reduce the hydrochloric acid additive amount of system, and liquid medicine constantly follows again
During ring use, volume will not expand, and reach 100% cycling and reutilization of etching.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (8)
1. a kind of two-component acidity etching liquid recycling device, including the storage of etching waste liquor accumulator tank, diaphragm cell, regenerated liquid
Slot, water-vapor mixer, circulating slot and hydrochloric acid feedway are deposited, the diaphragm cell includes cathodic region and anode region, the erosion
It carves waste liquid accumulator tank with the diaphragm cell to be connected, the etching waste liquor for storing etching producing line, and is provided to diaphragm electrolysis
Slot, the regenerated liquid accumulator tank are connected with the diaphragm cell and circulating slot respectively, the regeneration for storing diaphragm cell
Etching solution is simultaneously provided to circulating slot, and the water-vapor mixer is used to the chlorine of diaphragm cell being directed into the circulating slot,
The circulating slot is used to the regeneration etching solution being provided to etching production line, the two-component acidity etching liquid recycling dress
It further includes ammonium chloride feedway to set, and the ammonium chloride feedway includes ammonium chloride accumulator tank, the pump housing and pipeline.
2. two-component acidity etching liquid recycling device as described in claim 1, which is characterized in that the ammonium chloride supply
Device is connected with the etching waste liquor accumulator tank, and ammonium chloride is provided to the etching waste liquor accumulator tank.
3. two-component acidity etching liquid recycling device as described in claim 1, which is characterized in that the ammonium chloride supply
Device is connected with the regenerated liquid accumulator tank, and ammonium chloride is provided to the regenerated liquid accumulator tank.
4. two-component acidity etching liquid recycling device as described in claim 1, which is characterized in that in the diaphragm electrolysis
It is provided with regenerated liquid overflow launder between slot and the regenerated liquid accumulator tank.
5. two-component acidity etching liquid recycling device as described in claim 1, which is characterized in that further include pipeline wind
Machine, the air inlet of the pipeline fan are connected with the exhaust outlet of the anode region, and the gas outlet of the pipeline fan and steam are mixed
The air inlet of clutch is connected.
6. two-component acidity etching liquid recycling device as described in claim 1, which is characterized in that set in the cathodic region
Cathode plate is set, the cathode plate is connected with the cathode of DC power supply, and the material of the cathode plate is Titanium, the cathode plate table
Face is free of coating.
7. two-component acidity etching liquid recycling device as described in claim 1, which is characterized in that the anode region is equipped with
Anode plate, the anode plate are connected with the anode of DC power supply, and the material of the anode plate is Titanium, the anode plate surface layer
Contain metal coating.
8. two-component acidity etching liquid recycling device as described in claim 1, which is characterized in that the diaphragm electricity
It includes multiple cathodic regions to solve slot.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820186337.XU CN208087748U (en) | 2018-02-02 | 2018-02-02 | Two-component acidity etching liquid recycling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820186337.XU CN208087748U (en) | 2018-02-02 | 2018-02-02 | Two-component acidity etching liquid recycling device |
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| CN208087748U true CN208087748U (en) | 2018-11-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852996A (en) * | 2019-04-12 | 2019-06-07 | 深圳市泓达环境科技有限公司 | A kind of electro-deposition recycling copper device and the copper recycling producing line using it |
| CN117448826A (en) * | 2023-10-30 | 2024-01-26 | 天水华洋电子科技股份有限公司 | Recycling process of etching solution of integrated circuit lead frame |
-
2018
- 2018-02-02 CN CN201820186337.XU patent/CN208087748U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852996A (en) * | 2019-04-12 | 2019-06-07 | 深圳市泓达环境科技有限公司 | A kind of electro-deposition recycling copper device and the copper recycling producing line using it |
| CN109852996B (en) * | 2019-04-12 | 2024-02-23 | 株洲稷维环保有限公司 | Electrodeposition copper recovery device and copper recovery production line using same |
| CN117448826A (en) * | 2023-10-30 | 2024-01-26 | 天水华洋电子科技股份有限公司 | Recycling process of etching solution of integrated circuit lead frame |
| CN117448826B (en) * | 2023-10-30 | 2024-05-17 | 天水华洋电子科技股份有限公司 | Recycling process of etching solution of integrated circuit lead frame |
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