CN101139659A - Method for reclaiming nickel from acidic nickel plating waste water - Google Patents

Method for reclaiming nickel from acidic nickel plating waste water Download PDF

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Publication number
CN101139659A
CN101139659A CNA2007100473698A CN200710047369A CN101139659A CN 101139659 A CN101139659 A CN 101139659A CN A2007100473698 A CNA2007100473698 A CN A2007100473698A CN 200710047369 A CN200710047369 A CN 200710047369A CN 101139659 A CN101139659 A CN 101139659A
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water
waste water
nickel
ion
acidic
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CNA2007100473698A
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CN101139659B (en
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王维平
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Shanghai Light Industry Research Institute Co Ltd
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Shanghai Light Industry Research Institute Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention relates to a method for recovering nickel from acidic nickel-plating waste water, which lets the waste water from an electric-plating rinsing groove to pass at least one ion exchanger to carry out ion exchanging so as to recover nickel. The method additionally comprises: using a pH sensor to detect the pH value of the waste water at an inlet pipe of the ion exchanger; comparing the pH value of the waste water with a critical pH value; and controlling a water supplementing mechanism to supplement water to the rinsing groove based on the comparison result. The invention provides proper pH value for ion exchanging, avoids disturbance from any acid on the adsorption of nickel ions, guarantees the adsorption efficiency and improves the quality of return water.

Description

A kind of method that from acidic nickel plating waste water, reclaims nickel
Technical field
The present invention relates to a kind of wastewater processing technology of ion exchange method, relate in particular to a kind of method that from acidic nickel plating waste water, reclaims nickel.
Background technology
In water technology, ion-exchange-resin process commonly used is handled electroplating wastewater, and its simple process is that plating piece embathes at accumulator tank earlier in the nickel plating production process, cleans at rinse tank respectively then.The nickel ion of taking out of from nickel bath that contains higher concentration in the accumulator tank, these nickel ions are brought rinse tank into plating piece, waste water can be pumped down to a nickel-plating waste water recovery system in the rinse tank, nickel ion is reclaimed by ion exchange resin absorption wherein, to reclaim the waste water reuse again behind the nickel again, as rinse water.The advantage of ion-exchange-resin process is that it is good to handle the back effluent quality, and can realize the reuse of water and the recovery of metal, so ion-exchange-resin process once was one of most widely used technology in China's electroplating wastewater processing.
Because ion-exchange-resin process depends on the metallic nickel ions in the exchange resin exchange waste water, therefore the efficient of ion-exchange is the key factor that influences nickel recovering effect and exchange resin service efficiency, in practice, the pH value is the important factor that influences ion-exchanging efficiency, and influence is more remarkable when especially using weakly acidic cationic exchanger resin to reclaim nickel.
At present, when reclaiming nickel, be under the weakly acidic condition nickel ion (Ni in the waste water usually at electroplating technology waste water with weakly acidic cationic exchanger resin online from nickel-plating waste water (trough rim) 2+) with resin in sodium ion (Na +) exchange, and can judge whether saturated inefficacy of ion exchange resin according to the reuse water pH value behind ion exchange resin.Particularly, when nickel ion and sodium ion normally exchange, pH value in the reuse water can be kept a higher pH (as 8.5), when the pH value drops to a certain value (as 5.6), show that promptly the nickel ion in the waste water is no longer effectively absorbed, the adsorbed nickel of ion exchange resin reaches capacity, and can change.
Yet because factors such as the needs of production technique or operating habit often have acidic substance to enter accumulator tank, accumulator tank is taken out of and is contained the pH value decline that tart solution can cause rinse water in the rinse tank.Not under the situation of cyclically utilizing, have a large amount of mobile rinse water to add to rinse tank at waste water, acidic substance are taken away by mobile water, and pH keeps balance.Be recycled the time spent and work as waste water, amount of makeup water obviously reduces, and acidic substance are accumulation constantly.Reclamation rate is high more, and make up water is few more, accumulates obviously more, and it is fast more that pH descends.
In this case, the saturated method of above-mentioned judgement is also inapplicable under the more highly acid condition at waste water.Because hydrogen ion (H +) exchange potential be higher than nickel ion, can have precedence over nickel ion and sodium ion exchanges, the hydrogen ion of higher concentration can disturb the absorption of nickel ion in the waste water, even the metallic nickel ions that will be adsorbed onto on the resin exchanges, and reenters in the recirculated water.If still judge the saturated of ion exchange resin, can occur after this pH value indication is saturated, this ion exchange resin being carried out can only obtaining the seldom situation of nickel when nickel reclaims according to reuse water pH value through ion exchange resin.In practice, the applicant finds that when the pH of waste water value drops to certain value (as 4.0) purpose that this interference effect can cause nickel to reclaim can not reach, and too high nickel ion concentration can influence the plating piece cleaning performance in the reuse water.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method that reclaims nickel from acidic nickel plating waste water, by waste water being remained on a suitable pH value, to improve the ion-exchanging efficiency of the metallic nickel ions in the waste water, guarantees the quality of rinse water simultaneously.
The present invention solves the problems of the technologies described above the technical scheme that adopts to provide a kind of method that reclaims nickel from acidic nickel plating waste water, make that effusive waste water carries out ion-exchange therefrom to reclaim nickel by at least one ion-exchanger from the electroplate rinsing groove, this method also comprises: with the waste water ph in the inlet pipeline of the described ion-exchanger of a pH sensor detecting; Relatively this waste water ph and a critical pH; And, control the opportunity of a water compensation mechanism to described rinse tank moisturizing according to this comparative result.
Above-mentioned reclaiming in the method for nickel from acidic nickel plating waste water, critical pH is between 4.5-5.5.
In the above-mentioned method that from acidic nickel plating waste water, reclaims nickel,, make this water compensation mechanism replenish cleaning water to rinse tank when waste water ph during less than this critical pH.
In the above-mentioned method that from acidic nickel plating waste water, reclaims nickel, this water compensation mechanism after being replenished cleaning water, rinse tank is also comprised: relatively this waste water ph and this critical pH again; And, make this water compensation mechanism stop described rinse tank is replenished cleaning water when this waste water ph during greater than this critical pH.
Above-mentioned reclaiming in the method for nickel from acidic nickel plating waste water, rinse tank is provided with an overflow port, and water is discharged from when the liquid level in the rinse tank surpasses this overflow port.
Above-mentioned reclaiming from acidic nickel plating waste water in the method for nickel, relatively the step of this waste water ph and a critical pH is to be carried out by a controller, and this controller connects this pH value transmitter, and sends control signal according to this comparative result to this water compensation mechanism.
In the above-mentioned method that reclaims nickel from acidic nickel plating waste water, water compensation mechanism comprises that a water inlet pipe and is located at the water compensating valve on the water inlet pipe, and wherein the control signal sent according to this controller of this water compensating valve is selected to open or close.
The present invention makes it compared with prior art owing to adopt above technical scheme, for ion-exchange provides suitable pH value condition, avoids the interference of acidic substance to nickel ion absorption, guarantees adsorption efficiency and improves reuse water quality.The application of automatic control technology also greatly reduces difficulty and operator's working load of operation in addition.The present invention can be applied to the technology of Weak-acid cation exchange process recovery nickel-plating waste water the online recovery of acid nickel-containing waste water thus.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 is to use the recovery system structure iron that reclaims the method for nickel from acidic nickel plating waste water of the present invention.
Fig. 2 is the schema of an embodiment of method of the present invention.
Embodiment
At first in conjunction with the workflow of description recovery system shown in Figure 1, plating piece embathes at accumulator tank 12 earlier in the nickel plating production process, cleans at first rinse tank 13 and second rinse tank 14 respectively then.Contain the nickel ion of taking out of from nickel bath 11 of higher concentration in the accumulator tank 12, these nickel ions are brought first rinse tank 13 into plating piece.Nickeliferous waste water is extracted out from first rinse tank 13 by water pump 15 and is entered the nickel-plating waste water recovery system, successively through first interchanger 16, second interchanger 17 and the 3rd interchanger 18, nickel ion in the waste water is adsorbed on Zeo-karb, and the water of purification is transported to 14 reuses of second rinse tank by pipeline.
It is pointed out that rinse tank can be two placed in-line countercurrent rinsing grooves 13,14 as shown in Figure 1, but also can be a plurality of placed in-line countercurrent rinsing grooves, also can be single independently rinse tank.The quantity of ion-exchanger only is the purpose of signal, is not as limiting.
Owing to reasons such as production technique needs or operating habits, often in accumulator tank 12, add acidic substance, workpiece is taken acidic solution out of, cause the pH value of the rinse water in first rinse tank 13 to descend, if there are an amount of fresh rinse water to replenish, acidic substance can flow out with rinse water, can not accumulate.And if the magnitude of recruitment of fresh water is not enough or fully replenish, constantly accumulation of the acidic substance in the rinse tank finally influences nickel ion absorption, even the nickel ion that occurs having adsorbed is submitted situation about changing from resin.
Please shown in Figure 2 in conjunction with consulting, embodiment of method of the present invention mainly comprises, step 201 is installed pH transmitter 21 at the inlet pipeline place of ion-exchanger 16, detects the pH value of water inlet with this pH transmitter 21; In step 202, the pH value signal of detection is transferred in the controller 24, and can show that its middle controller 24 relatively should detect a pH value and a critical pH in pH instrument 22, judges and whether detects the pH value less than critical pH; In step 203, whether controller 24 controls water compensation mechanism 19 to second rinse tank, 14 make up water according to this comparative result.As shown in Figure 1, water compensation mechanism 19 comprises a water inlet pipe 19a and water compensating valve 19b provided thereon.When detection pH value was lower than this critical pH, controller 24 sent control signal and opens water compensating valve 19b, and fresh water is added to second rinse tank 14, and flows into first rinse tank 13 (shown in arrow among the figure), the effect of playing the dilution acidic substance and improving the pH value.In addition, can on first rinse tank 13 overflow port 13a be set, the liquid level of rinse tank rises when replenishing fresh water, and the water that exceeds overflow port 13a flows out rinse tank 13, and acidic substance are discharged thereupon.Along with make up water constantly enters, the acidic substance in the circulation rinse water reduce gradually, and the pH value raises.In step 204, controller 24 compares the pH value and the critical pH of waste water again, and whether the pH value of judging waste water is greater than critical pH, in step 205, when the pH value that detects returns to critical pH when above, controller 24 sends control signal closes moisturizing valve 19a, stops moisturizing; Otherwise get back to step 203 and continue moisturizing.So go round and begin again, the pH value that enters the waste water of each ion-exchanger remains near the critical pH that is fit to ion-exchange absorption, thereby guarantees that the metal ion active adsorption reclaims and the quality of rinse water.
Above-mentioned critical pH is between 4.5~5.5, mainly in order to a pH value that is suitable for carrying out ion-exchange to be provided, and the factors such as consumption of consideration make up water.In the present embodiment, this critical pH preferably gets 5.0.
In addition, the outlet conduit of first exchange column 16 is provided with a pH value transmitter 23, in order to detect the pH value, come indication ion interchanger 16 whether saturated, this pH value inputs to controller 24, and whether decision reaches capacity according to the pH value by controller 24, and sends the signal that prompting is changed.
Therefore, the present invention can be applied to the technology of Weak-acid cation exchange process recovery nickel-plating waste water the online recovery of acid nickel-containing waste water, by a series of measurements and controlled step, for ion-exchange provides suitable pH value condition, avoid the interference of acidic substance, guarantee adsorption efficiency and improve reuse water quality nickel ion absorption.The application of automatic control technology also greatly reduces difficulty and operator's working load of operation in addition.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.

Claims (7)

1. method that reclaims nickel from acidic nickel plating waste water makes that effusive waste water carries out ion-exchange therefrom to reclaim nickel by at least one ion-exchanger from the electroplate rinsing groove, it is characterized in that this method also comprises:
With the waste water ph in the inlet pipeline of the described ion-exchanger of a pH sensor detecting;
Relatively this waste water ph and a critical pH; And
According to this comparative result, control the opportunity of a water compensation mechanism to described rinse tank moisturizing.
2. the method that reclaims nickel from acidic nickel plating waste water as claimed in claim 1 is characterized in that described critical pH is between 4.5-5.5.
3. the method that reclaims nickel from acidic nickel plating waste water as claimed in claim 1 is characterized in that, when waste water ph during less than this critical pH, makes this water compensation mechanism replenish cleaning water to described rinse tank.
4. the method that reclaims nickel from acidic nickel plating waste water as claimed in claim 3 is characterized in that, makes this water compensation mechanism replenish cleaning water to described rinse tank and also comprises afterwards:
Again relatively this waste water ph and this critical pH; And
When this waste water ph during, make this water compensation mechanism stop described rinse tank is replenished cleaning water greater than this critical pH.
5. the method that reclaims nickel from acidic nickel plating waste water as claimed in claim 3 is characterized in that described rinse tank is provided with an overflow port, and water is discharged from when the liquid level in the rinse tank surpasses this overflow port.
6. the method that from acidic nickel plating waste water, reclaims nickel as claimed in claim 1, it is characterized in that, relatively the step of this waste water ph and a critical pH is to be carried out by a controller, and this controller connects this pH value transmitter, and sends control signal according to this comparative result to this water compensation mechanism.
7. the method that from acidic nickel plating waste water, reclaims nickel as claimed in claim 6, it is characterized in that, described water compensation mechanism comprises that a water inlet pipe and is located at the water compensating valve on the water inlet pipe, and wherein the control signal sent according to this controller of this water compensating valve is selected to open or close.
CN2007100473698A 2007-10-24 2007-10-24 Method for reclaiming nickel from acidic nickel plating waste water Expired - Fee Related CN101139659B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101805831A (en) * 2010-03-24 2010-08-18 埃梯星(厦门)电子科技有限公司 Method for directly extracting nickel in alkaline chemical nickel-plating waste liquid
CN101817607A (en) * 2010-03-24 2010-09-01 埃梯星(厦门)电子科技有限公司 Method for directly extracting nickel in acidic chemical nickel plating waste solution
CN101892389A (en) * 2010-07-14 2010-11-24 王昊杨 Method for preparing nano metallic nickel in spent electroless nickel plating solution
TWI418517B (en) * 2011-09-30 2013-12-11 Chuang Tsang Hung Treatment of electroless nickel plating wastewater
CN106282560A (en) * 2016-04-28 2017-01-04 南京霖厚环保科技有限公司 In acid solution containing nickel, the extraction and cleaning of nickel controls technique
CN108396365A (en) * 2018-03-27 2018-08-14 台州市宏民环保科技有限公司 A kind of electronickelling is water-saving and the method for nickel recycling

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200940168Y (en) * 2006-04-30 2007-08-29 上海轻工业研究所有限公司 Electroplating wastewater trough side recovery equipment

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101805831A (en) * 2010-03-24 2010-08-18 埃梯星(厦门)电子科技有限公司 Method for directly extracting nickel in alkaline chemical nickel-plating waste liquid
CN101817607A (en) * 2010-03-24 2010-09-01 埃梯星(厦门)电子科技有限公司 Method for directly extracting nickel in acidic chemical nickel plating waste solution
CN101817607B (en) * 2010-03-24 2011-08-10 埃梯星(厦门)电子科技有限公司 Method for directly extracting nickel in acidic chemical nickel plating waste solution
CN101892389A (en) * 2010-07-14 2010-11-24 王昊杨 Method for preparing nano metallic nickel in spent electroless nickel plating solution
TWI418517B (en) * 2011-09-30 2013-12-11 Chuang Tsang Hung Treatment of electroless nickel plating wastewater
CN106282560A (en) * 2016-04-28 2017-01-04 南京霖厚环保科技有限公司 In acid solution containing nickel, the extraction and cleaning of nickel controls technique
CN108396365A (en) * 2018-03-27 2018-08-14 台州市宏民环保科技有限公司 A kind of electronickelling is water-saving and the method for nickel recycling

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