CN107129093A - The chemically quick, method of high efficiente callback nickel and equipment therefor in nickel-plating waste liquid - Google Patents
The chemically quick, method of high efficiente callback nickel and equipment therefor in nickel-plating waste liquid Download PDFInfo
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- CN107129093A CN107129093A CN201710422713.0A CN201710422713A CN107129093A CN 107129093 A CN107129093 A CN 107129093A CN 201710422713 A CN201710422713 A CN 201710422713A CN 107129093 A CN107129093 A CN 107129093A
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- nickel
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- negative electrode
- waste liquid
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 171
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 74
- 238000007747 plating Methods 0.000 title claims abstract description 64
- 239000002699 waste material Substances 0.000 title claims abstract description 52
- 239000007788 liquid Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000002351 wastewater Substances 0.000 claims abstract description 23
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000010936 titanium Substances 0.000 claims abstract description 18
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000003197 catalytic effect Effects 0.000 claims abstract description 9
- 239000003999 initiator Substances 0.000 claims abstract description 8
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910001453 nickel ion Inorganic materials 0.000 claims abstract description 6
- 230000009467 reduction Effects 0.000 claims abstract description 6
- 230000035484 reaction time Effects 0.000 claims abstract description 5
- 238000011084 recovery Methods 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 47
- 239000000126 substance Substances 0.000 claims description 28
- 238000005342 ion exchange Methods 0.000 claims description 9
- 238000006555 catalytic reaction Methods 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 claims description 6
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims description 6
- 230000036647 reaction Effects 0.000 claims description 6
- 239000012279 sodium borohydride Substances 0.000 claims description 6
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 6
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 5
- 239000002826 coolant Substances 0.000 claims description 5
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- 239000003456 ion exchange resin Substances 0.000 claims description 4
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 239000000523 sample Substances 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000005273 aeration Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 229910000464 lead oxide Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims description 2
- 238000009713 electroplating Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 10
- 238000012545 processing Methods 0.000 abstract description 6
- 238000005868 electrolysis reaction Methods 0.000 abstract description 5
- 231100000614 poison Toxicity 0.000 abstract description 3
- 230000007096 poisonous effect Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000000284 extract Substances 0.000 abstract 1
- 230000032683 aging Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- -1 ethylenediamine Compound Chemical class 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 241000790917 Dioxys <bee> Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002894 chemical waste Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 1
- SPIFDSWFDKNERT-UHFFFAOYSA-N nickel;hydrate Chemical compound O.[Ni] SPIFDSWFDKNERT-UHFFFAOYSA-N 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0453—Treatment or purification of solutions, e.g. obtained by leaching
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0453—Treatment or purification of solutions, e.g. obtained by leaching
- C22B23/0461—Treatment or purification of solutions, e.g. obtained by leaching by chemical methods
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/06—Electrolytic production, recovery or refining of metals by electrolysis of solutions or iron group metals, refractory metals or manganese
- C25C1/08—Electrolytic production, recovery or refining of metals by electrolysis of solutions or iron group metals, refractory metals or manganese of nickel or cobalt
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Electrochemistry (AREA)
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Abstract
A kind of equipment investment is few, technological process is simple and the chemically nickel-plating waste liquid of non-pollution discharge in the quick, method of high efficiente callback nickel and equipment therefor.It extracts the nickel in the waste liquid by electrolysis process.Negative electrode in the electrolytic cell used sets to surround anode and is inside and outside two layers of titanium net basket cylindrical in shape, the bottom of the titanium net basket is closing structure, the spherical iron wire of bigger serface is filled with three-dimensional space network structure and had in the titanium net basket, initiator is used as using the metallic nickel that is generated in negative electrode, trigger in waste water 99.8% nickel ion on negative electrode continued reduction into metallic nickel, afterwards, then by the nickel metal recovery being deposited on negative electrode use again.It is characterized in：Without poisonous and pollution environment initiator；Is combined by electrolysis with catalytic phase reach it is easy, efficiently, quick nickel, reduction processing cost are reclaimed from waste water；Reaction time is short, you can in waste liquid 99.8% metallic nickel is deposited on negative electrode, and no nickel mud is produced, environmental protection.
Description
Technical field
The invention belongs to the field of trade waste resource reclaim, quick in more particularly to a kind of chemically nickel-plating waste liquid,
The method of high efficiente callback nickel.
Background technology
Chemical plating nickel technology is to develop faster process for treating surface in recent years, with application and production-scale
Constantly expand, the chemical waste fluid of generation is also more and more, and often handle such waste liquid not thorough in the prior art, thus give
Environment brings increasingly severe pollution.
Chemical nickel-plating solution was used after a period of time, due to the accumulation of the accessory substances such as its phosphite, caused nickel plating molten
Liquid aging, and the nickel plating solution after aging can decline the coating performance of plating piece, therefore, the nickel plating solution after aging is recognized
It is set to chemical nickel plating waste solution and enters wastewater treatment link.
Generally, the nickel containing 4000-10000mg/L in chemical nickel plating waste solution, COD (chemical oxygen consumption (COC)) is 40000-
70000mg/L, total phosphorus is in 20000-40000mg/L.
Heavy metal nickel element in nickel-containing waste water ecological environment, health can be caused to seriously endanger (nickel metal is poisonous,
The health of the mankind can be influenceed, to the biological toxic action survived under water environment it is also obvious that and being difficult to drop in its natural state
Solve as innocuous substance), if its directly discharge can be had a strong impact on into our environment, meanwhile, will also result in nickel resources waste, (nickel exists
Extensive use in mechanical industry, electronics industry and aircraft industry, the nickel metal storage level of China is few, belongs to strategy metal
Resource, demand is than larger in the development of China).At present, nickel-containing waste water recycling and harmless treatment are had become into ring
Protect the particularly important research field of industry.
The method of the current chemical nickle-plating wastewater of processing both at home and abroad can generally be divided into chemical method and Physical, mainly there is chemistry
The precipitation method, ion-exchange-resin process, solvent extraction, absorption method, membrane separation technique etc..These methods all using water pollution control as
Purpose, it is impossible to realize the recycling of nickel, while the processing of nickel is not up to standard.
To sum up, existing processing mode is substantially that coagulating sedimentation becomes nickel-containing sludge, resource do not obtain effectively reclaiming and
Recycle, also form secondary pollution, waste serious, therefore high efficiency recovery metals resources therein are very heavy from nickel-containing waste water
Will.Existing nickel-plating waste water treatment technology is largely unable to qualified discharge and discharge pollutes the environment.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of equipment investment is few, technological process simple and non-pollution discharge
The chemically quick, method of high efficiente callback nickel and equipment therefor in nickel-plating waste liquid.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
Nickel contains in the quick, method of high efficiente callback nickel, the chemical nickel plating waste solution in the chemically nickel-plating waste liquid of the present invention
Amount is in 4000-10000ppm, and COD is 40000-70000ppm, total phosphorus 20000-40000ppm, is reclaimed according to the following steps therein
Nickel；
1) chemical nickel plating waste solution is collected using collecting tank；
2) chemical nickel plating waste solution in collecting tank is pumped into the 1# reaction tanks that bottom is connected to compressed air；
3) alkali is added into 1# reaction tanks, pH value of waste water is adjusted between 7-8, while catalytic reducer is added, to turn
Speed is stirred for 300-500r/min speed；
4) after, the waste water stirred in 1# reaction tanks is pumped into 2# reaction tanks and is heated to carrying out plating piece normal electricity
The corresponding temperature of plating solution during plating；
5) after the waste water in 2# reaction tanks reaches design temperature, the waste water is pumped into electrolytic cell and carries out cell reaction,
Negative electrode in the electrolytic cell is to surround anode setting and is inside and outside two layers of titanium net basket cylindrical in shape, and the bottom of the titanium net basket is closure
Structure, is filled with three-dimensional space network structure and has the spherical iron wire of bigger serface in the titanium net basket；
6) using the metallic nickel that is generated in negative electrode as initiator, in waste water 99.8% nickel ion is triggered to continue on negative electrode
It is reduced into metallic nickel；
7) the nickel metal recovery being deposited on negative electrode is used again；
8) by the reacted coolant of electrolytic catalysis by ion exchange system, remaining nickel ion in the coolant is made again
It is secondary adsorbed；
9) by the nickeliferous waste water normal discharge up to standard less than 0.1ppm.
The catalytic reducer is the mixture of sodium borohydride, hydrazine hydrate and ethylenediamine, and wherein sodium borohydride is 2-6g/L,
Hydrazine hydrate is 20-30ml/L, and ethylenediamine is 15-35g/L, and remaining is water, and catalyst amount is 5-15ml/L.
The current density that the cell reaction is used is 100A/m2-400A/m2, the distance between anode and negative electrode are 2-
5cm, electrolytic catalysis reaction time 30-60min.
The corresponding temperature of the plating solution is at 80-90 DEG C.
The resin used in the ion exchange system is selective chelating ion exchange resin, and its flow velocity is 15-20BV/
h。
The quick, device of high efficiente callback nickel in the chemically nickel-plating waste liquid of the present invention, gives up including collecting chemical nickel plating successively
The collecting tank of liquid, multiple reaction tanks, electrolytic cell and ion exchange system, it is characterised in that：The anode of the electrolytic cell is dioxy
Change that lead finish titanium is made, its negative electrode is the titanium net basket set around anode, the titanium net basket is hollow for what is be coaxially disposed for inside and outside two layers
Cylinder, the section configuration of hollow can be circular, square or ellipse, and the barrel of hollow is netted, internal layer cylinder and outer layer
The bottom of cylinder is connected as a single entity and in closing structure, and it is in three-dimensional space network structure and tool to be filled between internal layer cylinder and outer layer cylinder
The spherical iron wire of bigger serface.
In the device of the present invention, the distance between negative electrode and anode in the electrolytic cell are 2-5cm, and cell reaction is used
Current density be 100A/m2-400A/m2。
In the device of the present invention, the reaction tank is respectively 1# reaction tanks and the 2# before being set in turn in electrolytic cell flow
Reaction tank, wherein,
1# reaction tanks are used to adjust the pH value for being pumped into chemical nickel plating waste solution therein between 7-8, while adding catalysis
Reducing agent is stirred；
It is used to heat to being pumped into chemical nickel plating waste solution therein from 1# reaction tanks in 2# reaction tanks, heating-up temperature is plating
The corresponding operating temperature of plating solution when part is normally electroplated, heater is provided with its bottom or side wall.
In the device of the present invention, compressed air inlet is provided with the bottom of 1# reaction tanks, is exposed on the entrance provided with multiple
Gas disk, the pressure of the compressed air is in 0.1-0.2MPa；2# reaction tanks are provided with corrosion resistant pH meter and temperature probe.
The present invention is reclaimed using electrolytic method to the metallic nickel in chemical nickel plating waste solution, makes it have following characteristics：
1) without it is poisonous and pollution environment initiator, the metallic nickel generated by way of electrolysis as initiator,
Trigger the nickel spontaneous reaction in chemical nickel plating waste solution.
2) by being electrolysed the processing mode combined with catalytic phase, reach in easy, efficient, quick chemically nickel-plating waste water
The purpose of nickel resources is reclaimed, processing cost is reduced.
3) reaction time is short, within the extremely short 30-60min times, in waste liquid 99.8% metallic nickel is deposited on negative electrode
On, no nickel mud is produced, environmental protection.The whole easily operated control of removal process and safety.
Brief description of the drawings
Technological processes and the block diagram of equipment therefor of the Fig. 1 for the recovery nickel of the present invention.
Embodiment
As shown in figure 1, the quick, method of high efficiente callback nickel is carried out by with step in the chemically nickel-plating waste liquid of the present invention：
1st, chemical nickel plating waste solution is collected using collecting tank.
The content of nickel is in 4000-10000ppm in the nickel-plating waste liquid, and COD is 40000-70000ppm, total phosphorus 20000-
40000ppm。
2nd, the chemical nickel plating waste solution in collecting tank is pumped into 1# reaction tanks, compressed air is accessed simultaneously in the bottom of the reaction tank
Connect with multiple aeration plates, the pressure of compressed air is in 0.1-0.2MPa, and the purpose for being passed through compressed air is in order that waste liquid is mixed
Close uniform.
3rd, at the same time, alkali is added into 1# reaction tanks, the pH value of the waste liquid in the 1# reaction tanks is adjusted weak to 7-8
Alkali state, then catalytic reducer is added into the reaction tank, catalytic reducer is from the mixed of sodium borohydride, hydrazine hydrate and ethylenediamine
Compound, wherein, sodium borohydride 2-6g/L, hydrazine hydrate 20-30ml/L, ethylenediamine 15-35g/L, catalyst amount is 5-15ml/L,
Speed using rotating speed as 300-500r/min is stirred.
Above-mentioned weak base state be conducive to after in electrolytic process, improve metallic nickel negative electrode deposition efficiency.Because, if
PH value is too low, then cathode hydrogen evolution side reaction can be made serious, cause current efficiency to decline；If pH value is too high, easily formed in waste liquid
Nickel hydroxide, is unfavorable for the reduction of metallic nickel, while too high pH value can also cause the decomposition of catalytic reducer.
4th, the waste water in 1# reaction tanks is pumped into 2# reaction tanks, waste liquid therein is heated, can be by anti-at this
Heater is set to realize heating on Ying Chi bottom or side wall.Corrosion-resistant pH meter probe and temperature probe are installed in reaction tank,
Waste liquid in the reaction tank is monitored in real time with realizing.
Waste liquid in the reaction tank is heated to 80-90 DEG C, the temperature is the plating solution pair when to plating piece normally electroplate
The operating temperature answered.
The operating temperature that waste liquid temperature is set into plating solution during with chemical nickel plating is consistent, is conducive to nickel in initiator and goes back
In the presence of former agent, accelerate catalytic reduction reaction.
5th, the waste liquid that temperature is reached in 2# reactors is pumped into electrolytic cell and be electrolysed.
The anode of the electrolytic cell is that brown lead oxide coated titanium is made, and its negative electrode is the titanium net basket set around anode, the titanium
The basket hollow that two layers is coaxially disposed for inside and outside, the section configuration of hollow can be circular, square or ellipse, hollow
The barrel of cylinder is netted, and the bottom of internal layer cylinder and outer layer cylinder is connected as a single entity in closing structure, is filled out between internal layer cylinder and outer layer cylinder
Filled with the spherical iron wire in three-dimensional space network structure, the spherical iron wire has infinite ratio surface area, is provided for nickel deposition
Infinite number of deposition site.Current density during electrolysis is 100A/m2-400A/m2, distance is set to 2- between negative electrode and anode
5cm, the temperature of 80-90 DEG C of holding, electrolytic catalysis reaction time 30-60min.
By electrolysis, metallic nickel is generated in negative electrode, initiator is served as by the metallic nickel being initially generated, triggers other in waste water
Nickel ion continued reduction on negative electrode generates metallic nickel.
Electrolytic process：
Anode：H20=4H++02+ 4e Eo=1.229V
Negative electrode：Ni2++ 2e=Ni Eo=0.25V
2H++ 2e=H2Eo=0V
Catalytic reduction process：R+Ni2++OH-=Ni
6th, 99.9% nickel is deposited on negative electrode after treatment, and negative electrode is washed, dried, and secondary profit is carried out to metallic nickel
With.
7th, the reacted coolant of electrolytic catalysis is made into the remaining nickel in chemical nickle-plating wastewater by ion exchange system
Adsorbed, nickel reaches emission request (Ni in waste water<0.1ppm).
Resin is selective chelating ion exchange resin in the ion exchange system, and flow velocity is：15-20BV/h.
The device that the method for quick, high efficiente callback nickel is used in the chemically nickel-plating waste liquid of the present invention is as follows：
Include collecting tank, 1# reaction tanks, 2# reaction tanks, electrolytic cell and the ion exchange system for collecting chemical nickel plating waste solution successively
System.
Each embodiment is referring to such as table 1 below
Table 1：Embodiment 1-5 parameter
Claims (9)
1. nickel content exists in the quick, method of high efficiente callback nickel, the chemical nickel plating waste solution in a kind of chemically nickel-plating waste liquid
4000-10000ppm, COD are 40000-70000ppm, total phosphorus 20000-40000ppm, and nickel therein is reclaimed according to the following steps；
1) chemical nickel plating waste solution is collected using collecting tank；
2) chemical nickel plating waste solution in collecting tank is pumped into the 1# reaction tanks that bottom is connected to compressed air；
3) add alkali into 1# reaction tanks, pH value of waste water adjusted between 7-8, while add catalytic reducer, using rotating speed as
300-500r/min speed is stirred；
4) after, the waste water stirred in 1# reaction tanks is pumped into when being heated to normally electroplating plating piece in 2# reaction tanks
The corresponding temperature of plating solution；
5) after the waste water in 2# reaction tanks reaches design temperature, the waste water is pumped into electrolytic cell and carries out cell reaction, the electricity
Negative electrode in solution groove is to surround anode setting and is inside and outside two layers of titanium net basket cylindrical in shape, and the bottom of the titanium net basket is tied for closure
Structure, is filled with three-dimensional space network structure and has the spherical iron wire of bigger serface in the titanium net basket；
6) using the metallic nickel that is generated in negative electrode as initiator, in the waste water 99.8% nickel ion continued reduction on negative electrode is triggered
Into metallic nickel；
7) the nickel metal recovery being deposited on negative electrode is used again；
8) by the reacted coolant of electrolytic catalysis by ion exchange system, make remaining nickel ion in the coolant again by
Absorption；
9) by the nickeliferous waste water normal discharge up to standard less than 0.1ppm.
2. the quick, method of high efficiente callback nickel in chemically nickel-plating waste liquid according to claim 1, it is characterised in that：Institute
The mixture that catalytic reducer is sodium borohydride, hydrazine hydrate and ethylenediamine is stated, wherein sodium borohydride is 2-6g/L, and hydrazine hydrate is
20-30ml/L, ethylenediamine is 15-35g/L, and remaining is water, and catalyst amount is 5-15ml/L.
3. the quick, method of high efficiente callback nickel in chemically nickel-plating waste liquid according to claim 2, it is characterised in that：Institute
Current density that cell reaction uses is stated for 100A/m2-400A/m2, the distance between anode and negative electrode are 2-5cm, electrolytic catalysis
Reaction time 30-60min.
4. the quick, method of high efficiente callback nickel in chemically nickel-plating waste liquid according to claim 3, it is characterised in that：Institute
The corresponding temperature of plating solution is stated at 80-90 DEG C.
5. the quick, method of high efficiente callback nickel in chemically nickel-plating waste liquid according to claim 4, it is characterised in that：Institute
The resin used in ion exchange system is stated for selective chelating ion exchange resin, its flow velocity is 15-20BV/h.
6. the quick, device of high efficiente callback nickel in a kind of chemically nickel-plating waste liquid, includes the receipts of collection chemical nickel plating waste solution successively
Collect groove, multiple reaction tanks, electrolytic cell and ion exchange system, it is characterised in that：The anode of the electrolytic cell applies for brown lead oxide
Layer titanium is made, and its negative electrode is the titanium net basket set around anode, and the titanium net basket is inside and outside two layers hollow being coaxially disposed, hollow
The section configuration of cylinder can be circular, square or ellipse, and the barrel of hollow is netted, the bottom of internal layer cylinder and outer layer cylinder
It is connected as a single entity and in closing structure, is filled between internal layer cylinder and outer layer cylinder in three-dimensional space network structure and tool Large ratio surface
Long-pending spherical iron wire.
7. the quick, device of high efficiente callback nickel in chemically nickel-plating waste liquid according to claim 6, it is characterised in that：Institute
The distance between negative electrode and anode in electrolytic cell is stated for 2-5cm, the current density that cell reaction is used is 100A/m2-400A/
m2。
8. the quick, device of high efficiente callback nickel in chemically nickel-plating waste liquid according to claim 7, it is characterised in that：Institute
It is respectively the 1# reaction tanks and 2# reaction tanks before being set in turn in electrolytic cell flow to state reaction tank, wherein,
1# reaction tanks are used to adjust the pH value for being pumped into chemical nickel plating waste solution therein between 7-8, while adding catalysis reduction
Agent is stirred；
In 2# reaction tanks be used for heated to being pumped into chemical nickel plating waste solution therein from 1# reaction tanks, heating-up temperature for plating piece just
Often the corresponding operating temperature of plating solution during plating, heater is provided with its bottom or side wall.
9. the quick, device of high efficiente callback nickel in chemically nickel-plating waste liquid according to claim 8, it is characterised in that：
The bottom of 1# reaction tanks is provided with compressed air inlet, and multiple aeration plates are provided with the entrance, and the pressure of the compressed air exists
0.1-0.2MPa；2# reaction tanks are provided with corrosion resistant pH meter and temperature probe.
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| CN201710422713.0A CN107129093A (en) | 2017-06-07 | 2017-06-07 | The chemically quick, method of high efficiente callback nickel and equipment therefor in nickel-plating waste liquid |
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| CN201710422713.0A CN107129093A (en) | 2017-06-07 | 2017-06-07 | The chemically quick, method of high efficiente callback nickel and equipment therefor in nickel-plating waste liquid |
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| CN109809600A (en) * | 2019-03-15 | 2019-05-28 | 深圳市世清环保科技有限公司 | Device for rapid treatment of chemical nickel aging solution |
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