CN201686754U - Automatic control device for extracting copper by electrolyzing waste etching liquid - Google Patents
Automatic control device for extracting copper by electrolyzing waste etching liquid Download PDFInfo
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- CN201686754U CN201686754U CN2010201941512U CN201020194151U CN201686754U CN 201686754 U CN201686754 U CN 201686754U CN 2010201941512 U CN2010201941512 U CN 2010201941512U CN 201020194151 U CN201020194151 U CN 201020194151U CN 201686754 U CN201686754 U CN 201686754U
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Abstract
The utility model discloses an automatic control device for extracting copper by electrolyzing waste etching liquid, comprising a specific gravity measuring device, a PLC control system (2), and an electrolysis power supply, wherein the specific gravity measuring device connected with the PLC control system (2); the electrolysis power supply is connected with the PLC control system; the specific gravity measuring device is arranged in the waste etching liquid used as electrolyte, and is used for measuring the specific gravity of the electrolyte and transmitting measured specific gravity signals to the PLC control system; and the PLC control system is used for receiving the specific gravity signals and transmitting control signals converted according to the specific gravity signals to the electrolysis power supply, and controlling the electrolysis voltage and/or current output by the electrolyzing power supply. The automatic control device utilizes the characteristic that the specific gravity of liquid in the waste etching liquid changes along the change of the concentration of copper ions in the process of electrolysis, can regulate the electrolysis conditions automatically, thus greatly saving labor and materials, improving the electrolysis efficiency and copper extracting effect ad reducing the energy consumption.
Description
Technical field
Thereby relating to, the utility model follows the trail of the automatic control device that electrolytic condition is regulated in the bath composition variation automatically in the electrolytic process automatically.Be particularly related to the automatic control device that from spent etching solution, extracts metallic copper with electrolytic process.
Background technology
Basis as electronic industry, information industry and household electric appliances, the printed circuit board enterprise of one of external heavy polluted industry shifts to China one after another over nearly 20 years, makes PCB (printed circuit board) industry of China keep 10～12% annual growth rate in recent years always.More than 3500 families of PCB enterprise of multiple scale are arranged at present, and annual production reaches 1.2 hundred million square metres, leaps to first of the whole world.Annual PCB enterprise mean consumption copper is more than 200,000 tons, and copper content has constituted serious harm more than 80,000 tons to the society especially water resources of PCB surrounding area in the waste liquid of output (spent etching solution).Etching is to consume the maximum operation of liquid medicine amount during PCB produces, and also is to produce waste liquid (being so-called Hazardous wastes---spent etching solution, by the waste separation name of State Environmental Protection Administration) and the maximum operation of waste water (being once washing waste water and secondary washing waste water).Generally speaking, it is 2～3 liters that the dual platen of one square metre of normal thickness of every production (18 μ m) consumes etching solution, and produces 2～3 liters of spent etching solutions, 50～75 liters of once washing waste water, 80～100 liters of secondary washing waste water.Present way be regularly or not timing ground from the very high spent etching solution of etching bath discharge section copper content, simultaneously to wherein adding new liquid medicine.Usually the best copper concentration in the etching solution is at 110～130 grams per liters, and when effluxing, then wishes copper concentration high more good more (usually at 150～160 grams per liters), to improve the etching solution utilising efficiency as far as possible, reduces the total usage quantity of solution.
On Financial cost, present way is unfavorable to PCB enterprise, and these enterprises need spend considerable cost constantly to buy new etching solution on the one hand, and the useful component beyond the copper removal all is dropped in the spent etching solution.For some small-sized PCB enterprises, they directly efflux spent etching solution especially, and copper wherein also abandons in the lump.On the other hand, the spent etching solution of discharging is worth not only can't offset the expense of buying new etching solution, the treatment cost of blowdown is also extremely expensive, spent etching solution is taked the area of special measure of control at some, spent etching solution is gratuitously taken away or bargain purchase by third party enterprise, when polluting transfer, also reduced the prospect interest of PCB enterprise.
At present, separating copper from spent etching solution usually, and, make spent solution regeneration by replenishing or adjusting other non-copper components, be recycled in the etch process.Processing spent etching solution commonly used is to reclaim wherein copper and the method for the etching solution of regenerating mainly contains extraction reextraction electrolytic process, membrane sepn electrolytic process and direct electrolysis method.
Extraction reextraction electrolytic process needs extraction agent, and extraction agent is limited work-ing life, and need be to the extraction agent subsequent disposal.Because residual extraction agent in the regeneration after etching liquid, etch-rate reduces, and cycle index is limited.This method complicated operation, operation are many, and occupation area of equipment is big, also has the secondary pollution problem.
Though it is simple to operate that the membrane sepn electrolytic process has, the advantage that floor space is little, this method will be used separatory membrane, and the cost that film is changed is very high, this method power consumption is also high simultaneously.And the ammonia escaped quantity is big in the electrolytic process, needs a large amount of ammonia that replenish during the regeneration etching solution.
Comparatively speaking, the direct electrolysis method energy consumption is low, working cost is low, easy and simple to handle, occupation area of equipment is little, environment is not polluted, and regenerated etching solution etching quality is stable.
For example disclose a kind of method that from copper-containing solution, can't harm separating copper among the CN1908232A, just adopted direct electrolysis method.Although the other relatively two kinds of methods of this method have numerous advantages, but the content owing to cupric ion in electrolytic process reduces gradually, can cause electrolysis is not all to be in best or preferable state all the time, if the terms and conditions in the out of true control electrolytic process, as current density and voltage, also can cause the increase of energy consumption and the reduction of the rate of recovery.
At such problem, the concentration of cupric ion in the spent etching solution, manual shift electrolytic condition detect in the electrolytic process by the special messenger in some enterprise.On the one hand, this method waste of manpower; On the other hand, owing to can not regulate too continually, thereby can not obtain best effect and make energy consumption minimized.
The utility model content
At above problem, thereby the purpose of this utility model provides a kind of automatic control device that can follow the trail of bath composition variation control electrolytic condition in the electrolytic process automatically.
Thereby the further purpose of the utility model provides and a kind ofly can further detect the variation automatic liquid supply of liquid level of electrolyte and the automatic control device of overflow.
For this reason, provide a kind of automatic control device that spent etching solution is carried copper that is used for, described automatic control device comprises: the specific gravity test device; The PLC Controlling System that links to each other with described specific gravity test device; With the electrolysis power that links to each other with described PLC Controlling System, described specific gravity test device is arranged on the proportion that is used to measure described electrolytic solution in the spent etching solution as electrolytic solution, and the proportion signal that records is passed to the PLC Controlling System; Described PLC Controlling System is used to receive described proportion signal and will passes to described electrolysis power according to the control signal of described proportion conversion of signals, controls the electrolysis voltage and/or the electric current of described electrolysis power output.
According to a kind of embodiment, described specific gravity test device is a specific gravity hydrometer.
According to another kind of embodiment, wherein said specific gravity test device comprises: be suspended in the moving part that can fluctuate along with the variation of described electrolyte density in the described electrolytic solution; With near described moving part, make described moving part be positioned at fixed part in the described electrolytic solution.Be furnished with one on the wherein said moving part and be exposed to the outer mobile induction point of described electrolytic solution all the time, and the compartment of terrain is furnished with at least three fixedly induction points on the described fixed part, when described mobile induction point and described fixedly induction point generation induction, send described proportion signal to described PLC Controlling System.
Described fixedly induction point is preferably 3～10.
Described fixed part has at least one arm described moving part is positioned near the described fixed part.Preferably, described fixed part is detachable support.
According to preferred embodiment, described automatic control device can further comprise the recycle pump that links to each other and make described circulation of elecrolyte stir or stop according to the proportion signal that obtains with described PLC Controlling System.
According to preferred embodiment, described automatic control device can further comprise with described PLC Controlling System (2) and linking to each other according to the mother liquor pump (5) of the additional useless etching mother liquor of the proportion signal that obtains.
According to preferred embodiment, described automatic control device also can comprise with described PLC Controlling System (2) and linking to each other according to the overflow type pump (6) of the surplus liquid of discharge opeing signal discharge electrolysis that obtains.
According to preferred embodiment, described automatic control device also can comprise linking to each other with described PLC Controlling System (2) and cools off the temperature control system (7) of described electrolytic solution according to the temperature signal that obtains.
Automatic control device of the present utility model utilizes the spent etching solution characteristics that liquid specific gravity changes with the variation of copper ion concentration in electrolytic process, adopt specific gravity hydrometer to obtain the electrolysis situation of spent etching solution simply, and adopt the PLC Controlling System that the proportion signal that obtains is converted into control signal, thereby can control electrolytic condition automatically, in electrolytic whole process, remain best electrolysis state.The man power and material has been saved in the application of this device greatly, has improved electrolytic efficiency and has put forward the copper effect, and reduced energy consumption.
Description of drawings
The following drawings has shown preferred implementation of the present utility model, and wherein identical Reference numeral refers to identical parts.
Fig. 1 handles the schematic flow sheet of alkaline spent etching solution for direct electrolysis method;
Fig. 2 is the structural representation according to the automatic control device of the utility model embodiment;
Fig. 3 is the structural representation according to the specific gravity test device of preferred implementation of the present utility model that is installed on the electrolyzer.
Accompanying drawing among the application is synoptic diagram, one skilled in the art will understand that to clearly illustrating or outstanding some part, and size shown in the figure is not a physical size by the dwindling or amplifies of same ratio, and the shape of some parts is not the shape of reality yet.
Embodiment
In order further to cut down the consumption of energy, improve electrolytic efficiency and put forward the copper effect, and realize the full-automation that spent etching solution is handled, the utility model provides a kind of automatic control device that is used for direct electrolysis method from the spent etching solution separating copper.
The principle of work of this device is to utilize the proportion and the basic corresponding relation of copper ion concentration of spent etching solution, by measuring the proportion of spent etching solution in the direct electrolytic process, the variation of copper ion concentration in the reflection spent etching solution indirectly, and be that control signal passes to the PLC Controlling System with this proportion signal configures, to realize controlling automatically the purpose of electrolytic condition.
According to a kind of embodiment of the present utility model, be example with reference to figure 1 with the direct electrolysis of alkaline spent etching solution, illustrate that electrolysis puies forward the process of copper.
In step 101, the spent etching solution that PBC enterprise discharges is introduced electrolyzer, wherein PCB enterprise discharges the spent etching solution that copper ion concentration exceeds processing requirement, and at this moment the concentration of cupric ion is called mother liquor usually more than 150g/L in the spent etching solution.In step 102, adjust the ionic concn of spent etching solution, usually by dilution, the concentration of adjusting cupric ion etc. is to be suitable for electrolysis.For example copper ion concentration can be adjusted to 20～120g/L.In step 103, carry out electrolysis then.Electrolysis obtains metallic copper and surplus liquid after finishing.Metallic copper reclaims from cathodic disbonding.The surplus liquid of part is restored in the electrolyzer, mixes as thinner and mother liquor in the ionic concn set-up procedure, obtains being suitable for electrolytic electrolytic solution.Other surplus liquid are allocated in step 104, to replenish non-copper component, as chlorine, return etching work procedure then in step 105, are utilized again as new etching liquid medicine.
In electrolytic process, cupric ion is reduced, and separating out at negative electrode becomes metallic copper, certain negatively charged ion in the while solution, and for example hydroxide ion or chlorion are reduced according to voltage is different.
In the electrolytic process, the spent etching solution stirring that constantly circulates is stably carried out to guarantee the oxidation-reduction reaction in the electrolysis.Carry out along with electrolytic, copper ion concentration descends gradually, and solution proportion also reduces thus.When the density loss of cupric ion arrives to a certain degree, need to regulate electrolysis voltage and current density to guarantee that cupric ion continues to be reduced with fast speeds.When the density loss of cupric ion during to low value more, still can make remaining cupric ion be reduced to metallic copper though continue boosted voltage, but because energy consumption is too high, can further replenish the mother liquor of spent etching solution usually, the discharge section copper ion concentration has been reduced to the surplus liquid of electrolysis of OK range simultaneously; Perhaps stop electrolysis.Cupric ion for example is lower than 20g/L in the surplus liquid.
Automatic control device of the present utility model can be used in the electrolyzer to play a role in above-mentioned electrolytic process: the proportion of measuring electrolytic solution by the specific gravity test device changes, send the proportion signal to the PLC Controlling System, the PLC Controlling System is a control signal with the proportion signal configures of obtaining, start corresponding program and regulate output voltage and/or electric current by the control electrolysis power, in electrolyzer, pump into useless etching mother liquor with further control working barrel, thereby improve electrolytic efficiency and put forward the copper effect, and make electrolytic whole process realize automatization.
Further describe automatic control device of the present utility model below in conjunction with accompanying drawing 2 and 3 with concrete preferred implementation.
With reference to figure 2, described automatic control device comprises specific gravity test device 1; PLC Controlling System 2 that links to each other with described specific gravity test device 1 and the electrolysis power 3 that links to each other with described PLC Controlling System 2.Described specific gravity test device 1 is arranged on the proportion that is used to measure electrolytic solution in the electrolytic solution (not shown), and the proportion signal that records is passed to PLC Controlling System 2.The PLC Controlling System is used to receive described proportion signal, and will pass to electrolysis voltage and/or the electric current that electrolysis power 3 is controlled its output according to the control signal of the proportion conversion of signals of being obtained, so that the copper ion concentration in electrolysis voltage and/or electric current and the electrolytic solution adapts.Can when guaranteeing electrolytic efficiency, make energy consumption minimized like this.
According to first embodiment of the present utility model, described specific gravity test device 1 can be specific gravity hydrometer.Specific gravity hydrometer is not particularly limited, as long as can measure proportion and any specific gravity hydrometer of proportion signal output all be can be used for this programme.The specific examples of specific gravity hydrometer has B.
According to second embodiment of the present utility model, as shown in Figure 3, specific gravity test device 100 comprises moving part 110 that is suspended in the electrolytic solution 200 and the fixed part 120 that is fixed on electrolyzer 300 outsides.Moving part 110 has proper density being suspended in the electrolytic solution 200, and is at least partially exposed through outside the electrolytic solution, and can be along with the variation of electrolyte density sink-float up and down, its shape is preferably bar-shaped.Fixed part 120 is used to make described moving part 110 location.Fixed part 120 can be support, so that be removably mounted on electrolyzer, on electrolyzer 300.As shown in Figure 3, can be installed on the outside of electrolyzer 300.Simultaneously, fixed part 120 is positioned at moving part 110 near the fixed part 120 by at least one arm 121 of stretching out.Be shown as two arms among Fig. 3, but be not limited thereto.Number and shape to arm are unqualified, as long as play the effect of constraint specific gravity hydrometer.Certainly, also can not comprise extra support, and the parts that utilize direct electrolyzer self by arm 121 parts such as grade that installation is stretched out, play the effect of constraint moving part 110 as fixed part 120.
Be furnished with one on the moving part 110 and be exposed to the outer mobile induction point 111 of electrolytic solution all the time.Correspondingly, be furnished with at least three fixedly induction points 122 on the fixed part 120 at interval, preferred longitudinal interval is arranged 3～10 fixedly induction points.Fixedly induction point is many more, and is meticulous more to the control of electrolytic process.Wherein said mobile induction point 111 moves up and down with the sink-float of described moving part 110, and responds to described fixedly induction point 122, thereby utilizes the fixedly relative position relation of induction point and mobile induction point, sends the proportion signal to PLC Controlling System 2.
Fixedly the induction between induction point and the mobile induction point can adopt any suitable prior art to realize, as long as fixedly the relative position relation of induction point and mobile induction point is converted to the signal that can transmit and passes to the PLC Controlling System.For example can adopt near switch etc.
See Fig. 2 again, according to optimal way of the present utility model, PLC Controlling System 2 also can be further links to each other with making the spent etching solution recycle pump 4 that stirs that constantly circulates, according to stopping of the proportion signal control recycle pump 4 that receives.Recycle pump 4 just needs to start when electrolysis begins, and stops when electrolysis finishes, and is used for making the stirring that constantly circulates of electrolytic solution in the electrolyzer at electrolytic process, thereby carries out electrolysis better, more efficiently.
According to the preferred mode of the utility model, PLC Controlling System 2 also can further be connected with the mother liquor pump 5 that is used for additional spent etching solution mother liquor.Mother liquor pump 5 starts when the concentration of cupric ion is lower than certain value in electrolytic solution, stops when reaching certain value, and electrolysis is sustainable to be carried out thereby make.
For realizing the fully automated of electrolytic process, PLC Controlling System 2 also can further be connected with overflow type pump 6 according to the discharge opeing signal that obtains in time discharges the surplus liquid of the satisfactory electrolysis of copper ion concentration.
In addition, PLC Controlling System 2 also can be connected with temperature control system 7, with the temperature of electrolytic solution in the further control electrolysis.Those skilled in the art can design the operation that corresponding parts and sequence of control are controlled overflow type pump 6 and temperature control system 7 according to prior art, just no longer describes in detail at this.
Below describe the utility model by specific embodiment in detail.Yet those of ordinary skill in the art should be understood that the above preferred embodiment of the present utility model that only is, is not to be used to limit protection domain of the present utility model.All any modifications of within spirit of the present utility model and principle, being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. one kind is used for the automatic control device that copper is carried in the spent etching solution electrolysis, and described automatic control device comprises:
Specific gravity test device (1,100);
The PLC Controlling System (2) that links to each other with described specific gravity test device (1,100); With
The electrolysis power (3) that links to each other with described PLC Controlling System (2),
Described specific gravity test device (1,100) is arranged on the proportion that is used to measure described electrolytic solution in the spent etching solution as electrolytic solution, and the proportion signal that records is passed to PLC Controlling System (2);
Described PLC Controlling System (2) is used to receive described proportion signal and will passes to described electrolysis power (3) according to the control signal of described proportion conversion of signals, controls the electrolysis voltage and/or the electric current of described electrolysis power (3) output.
2. according to claim 1ly be used for the automatic control device that copper is carried in the spent etching solution electrolysis, wherein said specific gravity test device (1,100) is a specific gravity hydrometer.
3. according to claim 1ly be used for the automatic control device that copper is carried in the spent etching solution electrolysis, wherein said specific gravity test device (1,100) comprising:
Be suspended in the moving part (110) that can fluctuate along with the variation of described electrolyte density in the described electrolytic solution; With
Near described moving part (110), make described moving part (110) be positioned at fixed part (120) in the described electrolytic solution,
Be furnished with one on the wherein said moving part (110) and be exposed to the outer mobile induction point (111) of described electrolytic solution all the time, and described fixed part (120) is gone up the compartment of terrain and is furnished with at least three fixedly induction points (122), when described mobile induction point (111) with described fixedly induction point (122) induction takes place, send described proportion signal to described PLC Controlling System (2).
4. according to claim 3ly be used for the automatic control device that copper is carried in the spent etching solution electrolysis, wherein said fixedly induction point (122) is 3～10.
5. according to claim 3ly be used for the automatic control device that copper is carried in the spent etching solution electrolysis, wherein said fixed part (120) has at least one arm (121) described moving part (110) is positioned near the described fixed part (120).
According in the claim 3～5 any one describedly be used for the automatic control device that copper is carried in the spent etching solution electrolysis, wherein said fixed part (120) is detachable support.
7. according to claim 1ly be used for the automatic control device that copper is carried in the spent etching solution electrolysis, wherein said automatic control device further comprises the recycle pump (4) that links to each other and make described circulation of elecrolyte stir or stop according to the proportion signal that obtains with described PLC Controlling System (2).
8. according to claim 1ly be used for the automatic control device that copper is carried in the spent etching solution electrolysis, wherein said automatic control device further comprises linking to each other with described PLC Controlling System (2) and replenishes the mother liquor pump (5) of useless etching mother liquor according to the proportion signal that obtains.
9. according to claim 1ly be used for the automatic control device that copper is carried in the spent etching solution electrolysis, wherein said automatic control device further comprises linking to each other with described PLC Controlling System (2) discharges the overflow type pump (6) of the surplus liquid of electrolysis according to the discharge opeing signal that obtains.
10. according to claim 1ly be used for the automatic control device that copper is carried in the spent etching solution electrolysis, wherein said automatic control device further comprises linking to each other with described PLC Controlling System (2) and cools off the temperature control system (7) of described electrolytic solution according to the temperature signal that obtains.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201941512U CN201686754U (en) | 2010-05-13 | 2010-05-13 | Automatic control device for extracting copper by electrolyzing waste etching liquid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201941512U CN201686754U (en) | 2010-05-13 | 2010-05-13 | Automatic control device for extracting copper by electrolyzing waste etching liquid |
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| CN201686754U true CN201686754U (en) | 2010-12-29 |
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| CN2010201941512U Expired - Fee Related CN201686754U (en) | 2010-05-13 | 2010-05-13 | Automatic control device for extracting copper by electrolyzing waste etching liquid |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953061A (en) * | 2011-08-25 | 2013-03-06 | 成都虹华环保科技有限公司 | Automatic addition system for etching-solution recycle equipment |
| CN103334123A (en) * | 2013-07-24 | 2013-10-02 | 阳谷祥光铜业有限公司 | Copper electrolysis system and running method |
| CN103699143A (en) * | 2012-09-27 | 2014-04-02 | 盛美半导体设备（上海）有限公司 | System and method for controlling concentration of polishing solution to be stable |
| CN104083902A (en) * | 2014-07-24 | 2014-10-08 | 广西新天德能源有限公司 | Intelligent stirring device for extraction of etching waste liquid |
| CN104911596A (en) * | 2015-06-01 | 2015-09-16 | 深圳中能润德环保有限公司 | Device and method for cyclic regeneration and copper extraction of etching liquid |
| CN105780051A (en) * | 2014-12-23 | 2016-07-20 | 重庆航凌电路板有限公司 | Printed circuit board alkaline etching copper recovery electrolysis equipment |
| CN113026021A (en) * | 2021-02-02 | 2021-06-25 | 宁波职业技术学院 | PID-based etching solution regeneration device control system and method |
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2010
- 2010-05-13 CN CN2010201941512U patent/CN201686754U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953061A (en) * | 2011-08-25 | 2013-03-06 | 成都虹华环保科技有限公司 | Automatic addition system for etching-solution recycle equipment |
| CN103699143A (en) * | 2012-09-27 | 2014-04-02 | 盛美半导体设备（上海）有限公司 | System and method for controlling concentration of polishing solution to be stable |
| CN103334123A (en) * | 2013-07-24 | 2013-10-02 | 阳谷祥光铜业有限公司 | Copper electrolysis system and running method |
| CN103334123B (en) * | 2013-07-24 | 2015-12-02 | 阳谷祥光铜业有限公司 | A kind of cupric electrolysis system and operation method |
| CN104083902A (en) * | 2014-07-24 | 2014-10-08 | 广西新天德能源有限公司 | Intelligent stirring device for extraction of etching waste liquid |
| CN105780051A (en) * | 2014-12-23 | 2016-07-20 | 重庆航凌电路板有限公司 | Printed circuit board alkaline etching copper recovery electrolysis equipment |
| CN104911596A (en) * | 2015-06-01 | 2015-09-16 | 深圳中能润德环保有限公司 | Device and method for cyclic regeneration and copper extraction of etching liquid |
| CN113026021A (en) * | 2021-02-02 | 2021-06-25 | 宁波职业技术学院 | PID-based etching solution regeneration device control system and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20130513 |