CN102373483A - Device for recovering silver from silver-containing waste water - Google Patents
Device for recovering silver from silver-containing waste water Download PDFInfo
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- CN102373483A CN102373483A CN2010102571610A CN201010257161A CN102373483A CN 102373483 A CN102373483 A CN 102373483A CN 2010102571610 A CN2010102571610 A CN 2010102571610A CN 201010257161 A CN201010257161 A CN 201010257161A CN 102373483 A CN102373483 A CN 102373483A
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Abstract
The invention discloses a device for recovering silver from silver-containing waste water. The device is utilized in laboratories and an environmental protection process of industrial silver-containing waste water treatment, and can recover silver from silver-containing waste water. The device comprises a reaction chamber, a waste liquid chamber, an electrolysis chamber, a drug addition hole, a guide plate, an interception tank, a liquid extraction pipe, a liquid extraction valve, a drainage pipe, a drainage valve, pole plates, a gallery, a mixer, an electric control device and an air release valve. The device can retain produced precipitates in the interception tank, extract supernate by the liquid extraction pipe, and make a silver-ammonia solution flow in the gallery by rotation of a motor in the electrolysis chamber so that concentration polarization is reduced. The device is simple, has a small floor space and a cost, and is convenient for management and maintenance.
Description
Technical field: this device belongs to a kind of and is applied in the environment protection technology that laboratory and industrial silver-containing waste water handle, and can reclaim the device of the silver in the silver-containing liquid waste.
Background technology: for the protection environment, guarantee Sustainable development, reduce environmental pollution, useless shadow liquid and the COD in the laboratory that this device is primarily aimed in the domestic photo industry analyze waste liquid and other silver-containing liquid waste.Sensitive film and the sensitized paper egative film behind developing solution immerses in the bleach-fixing liquid (hypo solution), makes unexposed and unreduced Silver monobromide (AgBr) dissolving, heavy metal silver is got in the environment environment is caused great harm.The chemical oxygen demand of waste water (COD) is the composite target of most popular discriminating water pollution degree in the water treatment both at home and abroad at present.COD analyzes regular works being not only each environmental monitoring department, also is that many factories, institution of higher education, R&D institution carry out waste water treatment and administer the day-to-day work in the research work.Carrying out COD when test, must add a certain amount of Sulfuric acid disilver salt and make catalyzer, make straight chain compound in the waste water by complete oxidation.If COD analyzed waste liquid discharge arbitrarily, contaminate environment not only, and a large amount of silver is run off thereupon.Along with the theory of Sustainable development is rooted in the hearts of the people, the further enhancing of environmental consciousness so consider from the angle of environment and from the economic angle of silver, all must manage to solve the recovery problem of silver in the silver-containing waste water.The processing of silver-containing waste water comes into one's own day by day, but also is not reported with the way of output that the mode that weakens concentration polarization improves silver.
Summary of the invention: difficult in order to overcome the deposition of damming in the prior art, electrolytic efficiency is low, and the electrolysis productive rate is not high, and hand labor intensity is big, and complicated operating process is safeguarded inconvenience, the deficiency that cost is high.The goal of the invention of the utility model is a kind of semi-automation of design, and running cost is low, improves electrolytic efficiency, solves the silver recovery unit that deposition is held back the silver-containing waste water of problem.The silver recovery unit of silver-containing waste water is transformed the equipment that traditional electrolytic process reclaims silver, designs the semi-automatic silver recovery unit of silver-containing waste water of a uniqueness, has improved the efficient of electrolytic silver greatly, is that the output of silver is improved.Working cost is low, and floor space is little.
The technical scheme that its technical problem of this device solves is adopted is: the reaction that silver-containing liquid waste and sodium-chlor generate silver nitride precipitation takes place in reaction chamber; The small baffle that make one by one the bottom of reaction chamber forms the groove shape; Simultaneously open liquid taking valve draining the supernatant time stage; Make it all is that supernatant is got rid of at every turn, can well retain deposition like this, the phenomenon of having avoided deposition to run off with the eliminating of liquid.In reaction chamber, add ammoniacal liquor and make the Silver monochloride dissolving generate silver-colored ammonium solution, silver ammino solution flows to from catheter in the tank room, carries out electrolytic reaction.In tank room, added gallery and stirrer, formed pulling flow type, silver ammino solution is flowed in gallery.Concentration polarization is meant when electric current passes through battery or electrolyzer that near electrolyte concentration the two poles of the earth and solution body are just variant, and the electropotential of anode and negative electrode and equilibrium electrode potential are departed from.This design can weaken even concentration polarization, thereby improves the output of electrolytic efficient and silver.This device part is used electric control, for semi-automatic equipment, has reduced manual operation.Easy accessibility is convenient to maintenance management.Because the reaction that this device relates to contains strong acid and highly basic, therefore use synthetic glass at shell, liquid flowing tube and catheter all are to use emulsion tube.Liquid taking valve is a tongs, can regulate flow, precipitates outflow in order to avoid flow is crossed ambassador.Be provided with the emptying valve, be convenient to emptying and clean.
The beneficial effect of the utility model is: the silver recovery unit of silver-containing waste water structurally is integrated reaction chamber, waste liquid chamber, tank room three Room, on function, will react with electrolysis and unify ctc, reduces floor space and cost, and management maintenance is convenient.The silver recovery unit of silver-containing waste water adopts corrosion resistant synthetic glass to process, and valve uses plastics or emulsion tube to process, and electrolytic plate material is a stainless steel, can batch production produce in batches, and field assembly, easy for installation.
Description of drawings: the utility model is further specified below in conjunction with accompanying drawing and embodiment.
Fig. 1 is the synoptic diagram of WWT automatic chemical dosing equipment.
1. reaction chambers among the figure; 2. waste liquid chamber; 3. tank room; 4. dosing hole; 5. flow deflector; 6. hold back groove; 7. liquid flowing tube; 8. liquid taking valve; 9. catheter; 10. drain valve; 11. gallery; 12. stirrer; 13. controller for electric consumption; 14. emptying valve; 15. pole plate.
Embodiment: in the embodiment shown in fig. 1, silver-containing waste water through flow deflector (5), gets into reaction chamber (1) from the dosing hole (4) of the silver recovery unit of silver-containing waste water.Sodium chloride solution is added from dosing hole (4), react, generate silver nitride precipitation with silver-containing waste water.Deposition is trapped within to be held back on the groove (6), opens liquid taking valve (8) supernatant is entered in the waste liquid chamber (2).Method with identical is washed several times with zero(ppm) water repeatedly.Ammoniacal liquor is added from dosing hole (4), start stirrer (12), make its reaction generate silver ammino solution.Open drain valve (10), make silver ammino solution pass through catheter (11) entering tank room (3) and carry out electrolysis.Stirrer starts during electrolysis, and silver ammino solution flows in gallery (11).On the negative electrode of pole plate (15), can obtain silver at last.Whisking appliance and electrolyzer are by controller for electric consumption (13) control, and it is good that the shell of reaction chamber, waste liquid chamber and tank room is the synthetic glass corrosion resistance nature, and emptying valve (14) can clean in emptying.
Claims (3)
1. the silver recovery unit of a silver-containing waste water, it comprises chemical reaction chamber, tank room, waste liquid chamber, dosing hole, flow deflector, holds back groove, multilayer liquid discharge pipe, tapping valve, catheter, drain valve, pole plate, gallery, stirrer, controller for electric consumption and emptying valve.
2. the silver recovery unit of silver-containing waste water according to claim 1; It is characterized in that: the silver nitride precipitation that produces in the reaction chamber is trapped within holds back the groove place; Supernatant is discharged from the multilayer liquid discharge pipe; Motor in the tank room rotates and silver-colored ammonium solution is circulated weaken the concentration polarization influence between gallery, and management maintenance is convenient.
3. the silver recovery unit of silver-containing waste water according to claim 1, it is characterized in that: positive/negative plate all is a stainless steel polar plate, 4 groups of parallel connections, polar plate spacing is 2cm, voltage is 1v between pole plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102571610A CN102373483A (en) | 2010-08-19 | 2010-08-19 | Device for recovering silver from silver-containing waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102571610A CN102373483A (en) | 2010-08-19 | 2010-08-19 | Device for recovering silver from silver-containing waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102373483A true CN102373483A (en) | 2012-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102571610A Pending CN102373483A (en) | 2010-08-19 | 2010-08-19 | Device for recovering silver from silver-containing waste water |
Country Status (1)
| Country | Link |
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| CN (1) | CN102373483A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560537A (en) * | 2012-03-09 | 2012-07-11 | 哈尔滨工业大学 | Silver recovery device for silver-containing waste liquor |
| CN106048657A (en) * | 2016-08-09 | 2016-10-26 | 成都虹华环保科技股份有限公司 | Laboratory silver recovery unit |
| CN106048656A (en) * | 2016-08-09 | 2016-10-26 | 成都虹华环保科技股份有限公司 | Silver recovery unit of silver-containing liquid waste |
| CN106591893A (en) * | 2016-12-26 | 2017-04-26 | 宁夏软件工程院有限公司 | Cathode plate passivation vehicle for preventing leakage of passivating liquid |
| CN111675298A (en) * | 2020-06-19 | 2020-09-18 | 绍兴皓诚环境建设工程有限公司 | Silver-containing wastewater treatment device capable of reducing resource waste |
-
2010
- 2010-08-19 CN CN2010102571610A patent/CN102373483A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560537A (en) * | 2012-03-09 | 2012-07-11 | 哈尔滨工业大学 | Silver recovery device for silver-containing waste liquor |
| CN102560537B (en) * | 2012-03-09 | 2014-06-11 | 哈尔滨工业大学 | Silver recovery device for silver-containing waste liquor |
| CN106048657A (en) * | 2016-08-09 | 2016-10-26 | 成都虹华环保科技股份有限公司 | Laboratory silver recovery unit |
| CN106048656A (en) * | 2016-08-09 | 2016-10-26 | 成都虹华环保科技股份有限公司 | Silver recovery unit of silver-containing liquid waste |
| CN106048656B (en) * | 2016-08-09 | 2018-09-25 | 成都虹华环保科技股份有限公司 | A kind of silver recovery unit of silver-containing liquid waste |
| CN106591893A (en) * | 2016-12-26 | 2017-04-26 | 宁夏软件工程院有限公司 | Cathode plate passivation vehicle for preventing leakage of passivating liquid |
| CN111675298A (en) * | 2020-06-19 | 2020-09-18 | 绍兴皓诚环境建设工程有限公司 | Silver-containing wastewater treatment device capable of reducing resource waste |
| CN111675298B (en) * | 2020-06-19 | 2021-06-29 | 绍兴皓诚环境建设工程有限公司 | Silver-containing wastewater treatment device capable of reducing resource waste |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120314 |