CN202595280U - Alkaline etching solution recovering device - Google Patents
Alkaline etching solution recovering device Download PDFInfo
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- CN202595280U CN202595280U CN 201220088036 CN201220088036U CN202595280U CN 202595280 U CN202595280 U CN 202595280U CN 201220088036 CN201220088036 CN 201220088036 CN 201220088036 U CN201220088036 U CN 201220088036U CN 202595280 U CN202595280 U CN 202595280U
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- copper
- reextraction
- etching solution
- alkaline etching
- storage tanks
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Abstract
The utility model relates to the technical field of etching solution recovering devices, in particular to an alkaline etching solution recovering device which comprises an extraction tower, a reextraction device and an electrolytic cell, wherein the top of the extraction tower is provided with an overflow pipeline which is connected with a copper loading etching solution storage tank, the copper loading etching solution storage tank is connected with the reextraction device, and the reextraction device is connected with the electrolytic cell. According to the utility model, the content of copper ions is reduced through an extraction device, the reextraction is carried out by using the reextraction device, copper resources can be recycled from a copper bath obtained in a reextraction process by using the electrolytic device, the copper bath treated by the electrolytic cell is converted into sulfuric acid and electrolytic copper, the sulfuric acid solution can be reused in the reextraction operation and no waste liquid and waste water emission exists in the treatment process.
Description
Technical field
The utility model relates to etching solution recovery system technical field, refers in particular to a kind of alkaline etching liquid recovery system.
Background technology
Alkali etching is the indispensable one procedure of PCB enterprise production; In the etching process because the dissolving of copper on the wiring board; Causing in the etching solution content of copper to build up increases; After copper ion concentration surpasses a threshold value, will have a strong impact on the etching quality, at this moment just must get rid of the etching solution of a part of high density and mend the concentration that reduces copper into the sub-liquid of the etching of equivalent.This part high-copper etching solution of getting rid of is exactly so-called etching waste liquor.
Over nearly 20 years, the PCB industry of China keeps the annual growth rate about 10% always, and more than 3500 families of PCB enterprise of multiple scale are arranged at present.Present most of PCB manufacturing enterprise also adopts the simple process pattern that etching waste liquor is taken out.On the one hand to take out price very low for etching waste liquor, makes PCB enterprise a lot of wealth that all run off every year; On the other hand; The enterprise that reclaims waste liquid takes the intermediates of simple neutralization precipitation method reclaim(ed) sulfuric acid copper mostly, makes in the waste water of discharging copper content up to the number grams per liters, and other inorganic and organism is more ignored its existence; Even the treatment plant that some are more large-scale; Copper concentration also often is higher than 1ppm in its outer draining, and ammonia nitrogen more can't be up to standard with organic cyanide, causes the serious environmental pollution problem.In addition, the risk that also has the serious environmental accident of generation of material from leakage in the copper scrap etching solution transportation.
State Environmental Protection Administration orientates PCB copper scrap etching solution (useless copper etching liquor) as the dangerous liquid refuse, and the regulation on-the-spot disposal is forbidden transboundary movement.
Therefore, based on the defective of above-mentioned existing alkaline etching liquid recovery technology, need improve existing alkaline etching liquid recovery technology.Explore the clearer production technology of copper etching process; Copper waste etching solution being eliminated in process of production, realized online cyclic regeneration, is that environmental protection department forces first of law enforcement to be selected; Also be that the PCB industry reduces production costs, walk the inevitable choice on the road of Sustainable development.
The utility model content
The purpose of the utility model is that the deficiency to prior art provides a kind of alkaline etching liquid recovery system, and it is existing that this alkaline etching liquid recovery system has solved existing alkaline etching liquid recovery technology: resource loss, sewage discharge can't be up to standard, transportation possibly produce defectives such as serious environmental accident.
For realizing above-mentioned purpose, the utility model is realized through following technical scheme:
The alkaline etching liquid recovery system comprises extraction tower, reextraction equipment, electrolyzer, and the extraction cat head has overflow spout and connects copper-loaded etching solution storage tanks, and copper-loaded etching solution storage tanks connects reextraction equipment, and reextraction equipment connects electrolyzer.
Six layers of sieve plate are installed in the said extraction tower.
Said extraction tower bottom is through the sub-liquid regulating tank of U type pipe connection.
Said sub-liquid regulating tank is connected with qualified sub-liquid storage tanks.
Said reextraction equipment adopts and mixes clarification equipment.
Said reextraction equipment is connected with the copper sulfate storage tanks, and the copper sulfate storage tanks connects electrolyzer.
The beneficial effect of the utility model is: alkaline etching waste liquid for producing is at first introduced in the extraction tower, reduces content of copper ion wherein through abstraction technique, and the alkaline etching liquid after the extraction treatment becomes the sub-liquid of qualified etching after replenishing and adding necessary chemical agent; The organic extractant that extraction tower is discharged is stripped with reextraction equipment; In the reextraction process; Cupric ion is transferred to the copper-bath that forms high density in the sulphuric acid soln, is fully regenerated through the operation extraction agent of stripping, and can circulate is used to extract copper removal; The copper-bath that obtains in the reextraction process can utilize electrolyzer to carry out the recovery of copper resource; Handle the back copper-bath through electrolyzer and change sulfuric acid and electrolytic copper into, sulphuric acid soln can be reused for the operation of stripping, and has no waste liquid and discharge of wastewater in the treating processes.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
See Fig. 1; The utility model alkaline etching liquid recovery system comprises: extraction tower 1, reextraction equipment 2, electrolyzer 3; Extraction tower 1 top has overflow spout and connects copper-loaded etching solution storage tanks 4, and copper-loaded etching solution storage tanks 4 connects reextraction equipment 2, and reextraction equipment 2 connects electrolyzer 3.
Six layers of sieve plate are installed in the said extraction tower 1.
Said extraction tower 1 bottom is through the sub-liquid regulating tank 6 of U type pipe connection.
Said sub-liquid regulating tank 6 is connected with qualified sub-liquid storage tanks 7.
Said reextraction equipment 2 adopts and mixes clarification equipment.
Said reextraction equipment 2 is connected with copper sulfate storage tanks 5, and copper sulfate storage tanks 5 connects electrolyzer 3.
The etching waste liquor that discharges in the PCB production process is at first collected in the etching waste liquor collection box, and right batch type joins in the orifice extraction column 1.Simultaneously add extraction agent continuously, on the extraction agent transport pipe, draw the etching solution of a part of lower floor, make extraction agent inlet bottom etching solution can access cycling extraction through ejector in extraction tower 1 bottom.On extraction agent inlet top six layers of sieve plate are installed, the etching solution with top in the extraction agent uphill process further carries out extraction process, and final extraction agent overflows to copper-loaded etching solution storage tanks 4 by extraction tower top riser.
Etching waste liquor density constantly descends in extraction process, when etching solution density is reduced to setting range, starts the etching waste liquor transferpump automatically, and etching waste liquor is quantitatively mended in the extraction tower 1.Be connected with a U type pipeline in extraction tower 1 bottom, mend in the process at etching waste liquor, the etching solution after the extraction overflows to sub-liquid regulating tank 6 through this pipeline, after manual shift, is discharged into confession PCB production use in the qualified sub-liquid storage tanks 7 as qualified sub-liquid.
Copper-loaded etching solution is through the sulphuric acid soln regeneration of stripping, and the cupric ion of organic phase load is transferred in the sulphuric acid soln in the reextraction process, forms the mixing solutions of sulfuric acid and copper sulfate.Reextraction equipment 2 uses and mixes clarification equipment, takes three series systems to strip.
In the crosscurrent extraction process, the solution of sulfuric acid and copper sulfate is carried through water pump, and delivery system is carried out flow equilibrium control automatically through electronic system.Carry pump outlet that ejector all is installed at every, utilize the extraction agent in the ejector suction prime equipment, so just formed the process of water and oil phase adverse current transmission.In order to guarantee the bulk flow balance of oil phase; On the inlet ejector suction port of secondary and three grades of clarification knockout towers, electronic by-pass valve is installed; But suction flow is too small when causing the prime oil phase to increase; Automatically opening electronic by-pass valve increases aspiration, when the reduction of prime oil phase is hanged down liquid level, closes electronic by-pass valve automatically and reduces aspiration.Extraction agent after the reextraction is collected in the extraction agent storage tanks, and circulation is used for extracting operation.The mixing solutions of sulfuric acid and copper sulfate is collected copper sulfate storage tanks 5, and the electrolyzer through electrolyzer 3 carries out electrolytic recovery copper then.
Electrolyzer is conventional electrolyzer 3 and conventional rectifier power source.At first the mixing solutions with sulfuric acid and copper sulfate pumps in the electrolyzer 3; The copper content of electrolysis and regular chemical examination cell liquid is carried out in energising then; When the solution copper content in the electrolyzer 3 lowers established standards, stop power supply, tank liquor is transported to supplies the use of stripping in the sulfuric acid storage tanks.And then the mixing solutions of in electrolyzer 3, mending sulfuric acid and copper sulfate repeats electrolysis.
What the utility model was different with conventional reclaiming system is:
1. etching waste liquor is not carried out thorough copper removal, so extraction tower adopted the simple orifice extraction column of structure, and the electron density measuring instrument has been installed, controlled the extraction process automatically in the extraction tower bottom.
2. reextraction equipment adopts the mixing equipment of ejector as oil phase and water, has cancelled the mixed stirring device in the legacy equipment, and the equipment cost cost of manufacture is reduced, and operation stability further strengthens.
3. the big flow of sulphuric acid soln as anti-stripping agent circulates; Do not require in the reextraction process that copper sulfate content increases substantially; The solution copper content of also not pursuing in the electrolytic process after the electrolysis reduces very low level, helps improving the current efficiency of electrolytic process like this.
Certainly; The embodiment of the above; It is the preferred embodiments of the utility model; And unrestricted the utility model practical range, so all equivalences of doing according to the described structure of the utility model claim, characteristic and principle change or modify, all should be included in the utility model claim.
Claims (6)
1. alkaline etching liquid recovery system is characterized in that: comprise extraction tower, reextraction equipment, electrolyzer, the extraction cat head has overflow spout and connects copper-loaded etching solution storage tanks, and copper-loaded etching solution storage tanks connects reextraction equipment, and reextraction equipment connects electrolyzer.
2. alkaline etching liquid recovery system according to claim 1 is characterized in that: six layers of sieve plate are installed in the said extraction tower.
3. alkaline etching liquid recovery system according to claim 1 is characterized in that: said extraction tower bottom is through the sub-liquid regulating tank of U type pipe connection.
4. alkaline etching liquid recovery system according to claim 3 is characterized in that: said sub-liquid regulating tank is connected with qualified sub-liquid storage tanks.
5. alkaline etching liquid recovery system according to claim 1 is characterized in that: said reextraction equipment adopts and mixes clarification equipment.
6. alkaline etching liquid recovery system according to claim 1 is characterized in that: said reextraction equipment is connected with the copper sulfate storage tanks, and the copper sulfate storage tanks connects electrolyzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220088036 CN202595280U (en) | 2012-03-09 | 2012-03-09 | Alkaline etching solution recovering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220088036 CN202595280U (en) | 2012-03-09 | 2012-03-09 | Alkaline etching solution recovering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202595280U true CN202595280U (en) | 2012-12-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220088036 Expired - Fee Related CN202595280U (en) | 2012-03-09 | 2012-03-09 | Alkaline etching solution recovering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202595280U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105506635A (en) * | 2016-01-29 | 2016-04-20 | 江苏净拓环保科技有限公司 | Alkaline etching solution regeneration and copper extraction system |
| CN106555055A (en) * | 2015-09-29 | 2017-04-05 | 宏齐科技股份有限公司 | The system and method for solid metallic is reclaimed from waste liquid containing metal |
-
2012
- 2012-03-09 CN CN 201220088036 patent/CN202595280U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106555055A (en) * | 2015-09-29 | 2017-04-05 | 宏齐科技股份有限公司 | The system and method for solid metallic is reclaimed from waste liquid containing metal |
| CN105506635A (en) * | 2016-01-29 | 2016-04-20 | 江苏净拓环保科技有限公司 | Alkaline etching solution regeneration and copper extraction system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20170309 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |