CN101712518A - Method for treating complex-containing nickel-plating waste liquid and nickel-plating rinsing wastewater - Google Patents
Method for treating complex-containing nickel-plating waste liquid and nickel-plating rinsing wastewater Download PDFInfo
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- CN101712518A CN101712518A CN 200810205038 CN200810205038A CN101712518A CN 101712518 A CN101712518 A CN 101712518A CN 200810205038 CN200810205038 CN 200810205038 CN 200810205038 A CN200810205038 A CN 200810205038A CN 101712518 A CN101712518 A CN 101712518A
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Abstract
The invention provides a method for treating complex-containing nickel-plating waste liquid and nickel-plating rinsing wastewater, which is characterized by comprising the following steps of: according to the characteristic of weakest complexing performance of a nickel ion under an acid condition, firstly, adjusting the pH values of the nickel-plating waste liquid or the nickel-plating rinsing wastewater from a first pH value to a second pH value, wherein the second pH value is not larger than three; then leading the complex-containing nickel-plating waste liquid or nickel-plating rinsing wastewater to carry out ion exchange by an ion exchange column provided with strong acid cation exchange resin and leading the nickel ion in the solution to be adsorbed on the resin; and adjusting the pH value of the treated solution to a target pH value. By adopting an ion exchange nickel ion adsorbing way, the problem of difficult treatment of the current complex-containing nickel-plating waste liquid and the nickel-plating rinsing wastewater is solved by a simple method; particularly, the nickel-plating rinsing wastewater can also be effectively recycled after being treated; and meanwhile, the metal nickel can be recovered, the economic benefits are brought, and the pollution to the environment is reduced.
Description
Technical field
The present invention relates to a kind of wastewater processing technology, relate in particular to a kind of method of utilizing ion exchange method to handle the nickel-plating waste liquid and the nickel-plating rinsing waste water that contain complex compound.
Background technology
Different with common electrical nickel plating, a large amount of complexing agents in the solution formula of chemical nickel plating, neutrality or alkaline nickel plating, have been added, as containing a large amount of nickel ions, ortho phosphorous acid radical ion, orthophosphite ions and multiple organism in the chemical nickel plating waste solution, must scrap renewal through after the use in several cycles, in the waste liquid in the common waste water of the concentration ratio of nickel the concentration of nickel high hundreds of times, handle direct discharging and not only do not waste metallic nickel but also contaminate environment if do not add.
Relatively low through the nickel concentration in the poaching wastewater after the rinsing in the rinse tank of chemical nickel plating, neutrality or alkaline nickel plating, if but not adding to handle directly discharges, also can cause the waste and the contaminate environment of metallic nickel.
Yet because these complexing agents and nickel ion have very strong complexing action, be present in the water with the negatively charged ion state after the complexing, cause the common cation switching technology can't active adsorption.If use the anionresin technology, macromolecular organic additive and complexing ion can cause resin stain in the waste water, influence the work-ing life of resin.In addition, handle also to be difficult to satisfy environmental requirement with the conventional chemical precipitator method, even the strong oxidizer oxidation also is difficult to destroy this complex status, therefore adding alkali carries out sedimentary poor effect.Present most of enterprise still handles by chemical precipitation method, mass consumption caustic soda (NaOH), and the part of nickel ion precipitation gets off, and can not dilute by sedimentary main other waste water that lean on.
Summary of the invention
Technical problem to be solved by this invention provides a kind of treatment process that contains the nickel-plating waste liquid and the nickel-plating rinsing waste water of complex compound, reclaims metal, reuse water resource by the nickel ion of removing in these solution, reduces production cost and discharged waste water.
The present invention solves the problems of the technologies described above the technical scheme that adopts to provide a kind of treatment process that contains the nickel-plating waste liquid and the nickel-plating rinsing waste water of complex compound, may further comprise the steps:
The nickel-plating waste liquid or the nickel-plating rinsing waste water that a. will contain complex compound are adjusted to one the 2nd pH value from one the one pH value, and wherein the 2nd pH value is smaller or equal to 3;
B. make the nickel-plating waste liquid or the nickel-plating rinsing waste water that contain complex compound carry out ion-exchange, make that nickel ion is adsorbed on the resin in the solution by the ion exchange column that storng-acid cation exchange resin is housed; And
C. the pH value with solution after the ion-exchange is adjusted to a target pH value.
In above-mentioned treatment process of the present invention, nickel-plating waste liquid or nickel-plating rinsing waste water are comprised from the step that a pH value is adjusted to the 2nd pH value: detect the nickel-plating waste liquid enter before this ion exchange column or the pH value of nickel-plating rinsing waste water; When pH value during greater than the 2nd pH value, add acid by a dosing pump to the pipeline of this nickel-plating waste liquid or nickel-plating rinsing waste water, mix by line mixer; And stop to add acid during smaller or equal to the 2nd pH value when the pH value that detects nickel-plating waste liquid or nickel-plating rinsing waste water.
In above-mentioned treatment process of the present invention, if processing is nickel-plating rinsing waste water, then also can comprise after the pH value with solution is adjusted to target pH value: the solution after the d. transport process to the nickel-plating rinsing groove of production line recycles.
In above-mentioned treatment process of the present invention, desirable target pH value is more than or equal to 6.
In above-mentioned treatment process of the present invention, also can comprise the resin of described ion exchange column is regenerated, to reclaim metallic nickel wherein.
The present invention is owing to adopt the mode of ion-exchange absorption nickel ion, solved the reluctant predicament of nickel-plating waste liquid that contains complex compound at present with simple method, especially effectively recycle after nickel-plating rinsing waste water is handled, metallic nickel can obtain reclaiming simultaneously, brings economic benefit and the minimizing pollution to environment.
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 the equipment synoptic diagram that contains the nickel-plating rinsing water treatment of complex compound according to an embodiment of the invention.
Fig. 2 is the nickel plating rinse water process flow figure that contains complex compound of one embodiment of the invention.
Fig. 3 is the nickel-plating waste liquid process flow figure that contains complex compound of one embodiment of the invention.
Embodiment
Be that example illustrates principle of the present invention with the nickel plating rinse water in the nickel-plating rinsing groove in the production line below.
Fig. 1 is the equipment synoptic diagram that contains the nickel-plating rinsing water treatment of complex compound according to an embodiment of the invention.Please refer to shown in Figure 1ly, this treatment facility 100 comprises liquid feeding pump 101, two accurate filter 102a-102b, acid tank 104, first dosing pump 105, first line mixer 106, three ion exchange column 107-109, alkali groove 110, second dosing pump 111, second line mixer 112.These parts link into an integrated entity by pipeline.In addition, treatment facility also comprises electric control box 120, a pH transmitter 121 and the 2nd pH transmitter 122.Wherein electric control box 120 is connected to first dosing pump 105, second dosing pump 111, a pH transmitter 121 and the 2nd pH transmitter 122, so that carry out corresponding electrical control.
Specifically, liquid feeding pump 101 connects the bottom of nickel-plating rinsing groove by inlet ductwork.First dosing pump 105, first line mixer 106 were housed before ion exchange column 107-109, wherein the suction line of first dosing pump 105 links to each other with acid tank 104, first dosing pump 105, first line mixer 106 add acid and carry out thorough mixing in entering ion exchange column forward direction pipeline, solution is adjusted to one the 2nd pH value by one the one pH value (for example pH neutral is to the alkaline pH value), the 2nd pH value should satisfy the acidity that the highly acidic cation clearing house needs, for example pH≤3.
The import of a plurality of ion exchange column 107-109 connects liquid feeding pump 101, and its outlet wherein is equipped with storng-acid cation exchange resin in the ion exchange column by the top of the solution after the export pipeline transport process to this rinse tank 2.The quantity of the ion exchange column of present embodiment does not limit, and in other embodiments, ion exchange column can be provided with one or more.
In the exit of the ingress of first ion exchange column 107 and last ion exchange column 109 a pH transmitter 121 is housed respectively and 122, two transmitters of the 2nd pH transmitter all link to each other with electric control box 120.
In the above-described embodiments, using the purpose of dosing pump is that regulator solution arrives target pH value.And in another embodiment, the device for adjusting pH value of waste water that also can use Chinese patent to disclose CN200995977 number replaces dosing pump.Wherein dosing pump is regulated the pH value and is applicable to the situation that treatment capacity is less, if treatment capacity more greatly then need replace dosing pump with device for adjusting pH value of waste water, the same dosing pump of using method.
Please refer to illustrated in figures 1 and 2ly, the nickel-plating rinsing waste water treating processes of present embodiment is as follows:
Specifically, water pump is squeezed into the water in the nickel-plating rinsing groove in the ion exchange column, the one pH transmitter 121 is measured water inlet pH value, as pH during greater than an above-mentioned pH value (for example 3), give first dosing pump 105 by sending instruction in the electric control box 120, the beginning of first dosing pump 105 adds acid in pipeline, mix by first line mixer 106, measures water inlet pH≤3 up to a pH transmitter 121 and o'clock stops to add acid;
In step 202, make the nickel-plating rinsing waste water that contains complex compound carry out ion-exchange by the ion exchange column that storng-acid cation exchange resin is housed, make that nickel ion is adsorbed on the resin in the solution.At this moment, the pH value is that 3 waste water enters ion exchange column and carries out ion-exchange, through strong-acid ion exchange resin metallic nickel is adsorbed, and then the liquid that comes out from last ion exchange column has been removed nickel, but this moment, the pH value was lower, can regulate as required;
In step 203, the pH value of solution after the ion-exchange is adjusted to target pH value, for example 6.Can measure the pH value of water outlet by the 2nd pH transmitter 122, if pH＜6, then give second dosing pump 111 by sending instruction in the electric control box 120,111 beginnings of second dosing pump add alkali in pipeline, mix by second line mixer 112, when the 2nd pH transmitter 122 is measured water inlet pH 〉=6, stop to add alkali.
Preferably, in step 204, the nickel plating rinse water after the transport process is got back to cyclically utilizing in the nickel-plating rinsing groove 2 of production line.
Whole process can on-line operation, guarantees the repeated use of nickel plating rinse water.
In addition, can also regenerate, to reclaim metallic nickel wherein to the resin of ion exchange column 107-109.
The above embodiments are descriptions of carrying out at nickel-plating rinsing waste water, and for the nickel-plating waste liquid of handling nickel bath, its treating processes is similar.Fig. 3 illustrates the treatment process of nickel-plating waste liquid.By equipment shown in Figure 1 this embodiment is described below.
In step 301, nickel-plating waste liquid is adjusted to the 2nd pH value from a pH value, wherein the 2nd pH value is smaller or equal to 3;
In step 302, make the nickel-plating waste liquid that contains complex compound carry out ion-exchange by the ion exchange column that storng-acid cation exchange resin is housed, make that nickel ion is adsorbed on the resin in the solution.At this moment, the pH value is that 3 waste water enters ion exchange column and carries out ion-exchange, through strong-acid ion exchange resin metallic nickel is adsorbed, and then the liquid that comes out from last ion exchange column has been removed nickel, but this moment, the pH value was lower, can regulate as required;
In step 303, the pH value of solution after the ion-exchange is adjusted to target pH value, for example 6.Can measure the pH value of water outlet by the 2nd pH transmitter 122, if pH＜6, then give second dosing pump 111 by sending instruction in the electric control box 120,111 beginnings of second dosing pump add alkali in pipeline, mix by second line mixer 112, when the 2nd pH transmitter 122 is measured water inlet pH 〉=6, stop to add alkali.
Water outlet after the processing no longer reuse and directly the discharging, wherein according to the emission standard needs, target pH value can change, for example be neutrality.
The present invention is owing to adopt the mode of ion-exchange absorption nickel ion, solved nickel-plating waste liquid and the reluctant predicament of nickel-plating rinsing waste water that contains complex compound at present with simple method, especially recycle effectively after nickel-plating rinsing waste water is handled, metallic nickel can obtain reclaiming simultaneously, brings economic benefit and the minimizing pollution to environment.
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 (5)
1. treatment process that contains the nickel-plating waste liquid and the nickel-plating rinsing waste water of complex compound may further comprise the steps:
The nickel-plating waste liquid or the nickel-plating rinsing waste water that a. will contain complex compound are adjusted to one the 2nd pH value from one the one pH value, and wherein the 2nd pH value is smaller or equal to 3;
B. make the nickel-plating waste liquid or the nickel-plating rinsing waste water that contain complex compound carry out ion-exchange, make that nickel ion is adsorbed on the resin in the solution by the ion exchange column that storng-acid cation exchange resin is housed; And
C. the pH value with solution after the ion-exchange is adjusted to a target pH value.
2. the method for claim 1 is characterized in that, nickel-plating waste liquid or nickel-plating rinsing waste water are comprised from the step that a pH value is adjusted to the 2nd pH value:
Detection enters the nickel-plating waste liquid before this ion exchange column or the pH value of nickel-plating rinsing waste water;
When pH value during greater than the 2nd pH value, add acid by a dosing pump to the pipeline of this nickel-plating waste liquid or nickel-plating rinsing waste water, mix by line mixer; And
When the pH value that detects nickel-plating waste liquid or nickel-plating rinsing waste water stops to add acid during smaller or equal to the 2nd pH value.
3. the method for claim 1 is characterized in that, if the object of handling is a nickel-plating rinsing waste water, and described method also comprises after step c:
D. the solution after the transport process to the nickel-plating rinsing groove of production line recycles.
4. as claim 1 or 3 described methods, it is characterized in that described target pH value is more than or equal to 6.
5. the method for claim 1 is characterized in that, also comprises the resin of described ion exchange column is regenerated, to reclaim metallic nickel wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810205038 CN101712518A (en) | 2008-12-30 | 2008-12-30 | Method for treating complex-containing nickel-plating waste liquid and nickel-plating rinsing wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810205038 CN101712518A (en) | 2008-12-30 | 2008-12-30 | Method for treating complex-containing nickel-plating waste liquid and nickel-plating rinsing wastewater |
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| CN101712518A true CN101712518A (en) | 2010-05-26 |
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| CN 200810205038 Pending CN101712518A (en) | 2008-12-30 | 2008-12-30 | Method for treating complex-containing nickel-plating waste liquid and nickel-plating rinsing wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109467220A (en) * | 2018-12-12 | 2019-03-15 | 深圳市世清环保科技有限公司 | A kind for the treatment of for reuse method and its system that nickel waste water is electroplated |
| CN112408670A (en) * | 2020-12-09 | 2021-02-26 | 淮安中顺环保科技有限公司 | Treatment method of electroless copper plating rinsing solution |
-
2008
- 2008-12-30 CN CN 200810205038 patent/CN101712518A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109467220A (en) * | 2018-12-12 | 2019-03-15 | 深圳市世清环保科技有限公司 | A kind for the treatment of for reuse method and its system that nickel waste water is electroplated |
| CN112408670A (en) * | 2020-12-09 | 2021-02-26 | 淮安中顺环保科技有限公司 | Treatment method of electroless copper plating rinsing solution |
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Open date: 20100526 |