CN101244876A - Apparatus for treating waste water for plating preprocessing process and processing method - Google Patents
Apparatus for treating waste water for plating preprocessing process and processing method Download PDFInfo
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- CN101244876A CN101244876A CNA200710004947XA CN200710004947A CN101244876A CN 101244876 A CN101244876 A CN 101244876A CN A200710004947X A CNA200710004947X A CN A200710004947XA CN 200710004947 A CN200710004947 A CN 200710004947A CN 101244876 A CN101244876 A CN 101244876A
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Abstract
The invention relates to a wastewater treatment device and a method during the process of plating pretreatment. The wastewater treatment method of the plating pretreatment process comprises the followings steps: overflowing the turbid wastewater in a descaling bath and a rinsing tank during the metal activation into a buffer pool, concentrating the wastewater after three times of filtering, using the high-purity filtrate obtained from the concentration process as a replenishing solution, and recovering and recycling high-purity treating liquid obtained after the metal salt, metal ion and other impurities have been removed from the concentrated solution, so as to save both water and water expense. Then, the high-purity acid with the metal ions removed is recycled to save plating cost; and harmful wastewater is not drained for fear of polluting river water. Moreover, the thorough water quality management is carried out to improve the quality of electric plating.
Description
Technical field
The present invention relates to a kind of waste water (washing water) treatment unit and treatment process thereof of plating preprocessing process, as the pretreatment stage in the electroplating process, employed waste water is handled when activating to pickling or to the metallic surface, to utilize once more as the filtrate of waste water, utilize again after removing metal ion in the sour waste water etc., thereby reach the reduction electroplating cost, prevent pollution of estuary and carry out water quality management completely by not discharging harmful waste water, improve the purpose of electroplating quality.
Background technology
To being carried out pickling by electronplate or the surface being carried out in the activatory preprocessing process, generally use strong acid such as sulfuric acid, hydrochloric acid, mineral acid in the electroplating process as treatment agent.With strong acid to being carried out pickling by electronplate, thereby after the surface activated, if before entering formal electroplating process, do not remove totally remaining in by the acid on the electronplate, will produce pernicious influence to electroplating quality, therefore must be through overpickling and water washing process.
Waste water at the washing bath that is used for pickling or metal activation process, pile up without doubt to have except acid and can hinder electroplated metal salt or metal ion, can shorten the life-span of acid and waste water like that, if therefore periodically do not observe its turbidity, do not carry out the metathetical words at any time, just can not guarantee electroplating quality.Additional or the displacement expense of acid and waste water is reflected on the electroplating cost, can increase cost burden, and the neutralizing acid wastewater, remove metal-salt expense quite a few.
And, in the waste water of spent acid, metal activation, except acid, also contain a large amount of heavy metals.Such electroplating wastewater is discharged into the pollution that can cause river in the rivers and creeks arbitrarily, for the people as edible water source, also comprises for the rivers and creeks ecology based on waterside plant and fish certainly all will producing fatal influence, becomes the arch-criminal who destroys environment.Consider this point, legal provisions: the electroplating wastewater that is produced in the preprocessing process of electroplating process must purify with special-purpose sewage treatment equipment.
In the existing plating process, never considered the acid and the metal-salt that are contained in the electroplating wastewater or metal ion reclaims and the method utilizing or remove once more.From the viewpoint of resource reutilization, recovered acid, metal-salt etc. and utilize once more from electroplating wastewater not can't but be the waste to precious resources.
Consider from this point, be necessary to find a kind of waste water that can utilize preprocessing process once more, can reclaim and utilization once more acid, thereby reduce electroplating cost, and by carrying out the method for the raising of water quality management completely electroplating quality.
Summary of the invention
(1) technical problem that will solve
The objective of the invention is to, a kind of wastewater treatment equipment and treatment process thereof of plating preprocessing process are provided, utilize again by employed waste water when activating as the pickling of pretreatment stage in the electroplating process or to the metallic surface, thereby conserve water and water rate, by the utilization again that the high purity acid of having removed metal ion is carried out, thereby the reduction electroplating cost prevents pollution of estuary and carries out water quality management completely by not discharging harmful waste water, thereby improves electroplating quality.
(2) technical scheme
The wastewater treatment equipment of plating preprocessing process of the present invention is characterized in that, above-mentioned pretreated waste water treatment unit comprises:
At the washing bath of forming by a plurality of washing baths that is used for preprocessing process, the shallow slot shape Buffer Pool that the waste water of the washing bath that turbidity is the highest is stored;
The waste water that will be positioned at the 1st storage tank filters, and is provided to No. 1 filtration unit of the 2nd storage tank again;
After the waste water of the 2nd storage tank filtered, filtrate is delivered to the 3rd washing bath, concentrated solution is delivered to No. 2 filtration units of the 2nd storage tank;
High-concentration waste water to the 3rd high storage tank of turbidity filters, and filtrate is delivered to the 2nd storage tank, and water of condensation is delivered to No. 3 filtration units of the 3rd storage tank;
The concentrated solution of discharging from the 3rd storage tank is filtered, remove the impurity of metal ion, metal-salt etc., only with 4th filtration unit of high purity acid liquid drainage to pickling tank.
Method according to the wastewater treatment of plating preprocessing process of the present invention, the waste water outflow that it is characterized in that the muddiness in the washing bath etc. with pickling tank, metal activation process is to Buffer Pool, concentrate through 3 filtrations, resulting high purity filtrate is as replenishing liquid from concentration process, to remove the concentrated solution of impurity such as metal-salt, metal ion again and recycled, thereby achieve the above object as high purity process liquid.
(3) beneficial effect
Aforesaid the present invention, can be with from being separated water outlet by the waste water of the muddiness that produces the preprocessing process of electronplate and as the treatment solution of pretreatment fluid, thereby the waste water in the preprocessing process can be utilized once more, have the good result that reduces electroplating cost and water saving, can be for carrying out water quality management completely, improving electroplating quality and contribute.
In addition, can hinder the high purity acid solution of impurity such as acid solution, the metal ion that utilizes again, metal-salt to reclaim and utilization again, further reduce electroplating cost, improve electroplating quality almost having removed all.
And, can not produce the waste water of polluted river water in this water treatment procedure, so have security.
Description of drawings
Fig. 1 is the pie graph according to the wastewater treatment equipment of plating preprocessing process of the present invention;
Fig. 2 is the pie graph of the wastewater treatment equipment of plating preprocessing process according to another embodiment of the present invention.
The nomenclature of major portion in the accompanying drawing
1: washing bath 2: pickling tank
10: 11: the 1 storage tanks of Buffer Pool
13: the 3 storage tanks of 12: the 2 storage tanks
30:2 filtration unit of 20:1 filtration unit
40:3 filtration unit 50: Di
61: upflow tube (over flow) 62: return line (reflux)
Embodiment
Fig. 1 has illustrated, is beneficial to electroplate, the surface is carried out activatory, is used for acid cleaning process or reactivation process wastewater treatment equipment that handle with waste water, that be applicable to preprocessing process in the future in order to remove by the foreign matters such as oil stain on the electronplate.This pretreated waste water treatment unit is made of Buffer Pool 10 and No. 40,4 filtration units 50 of No. 30,3 filtration units of No. 20,2 filtration units of No. 1 filtration unit.
According to by the flow process of the acid cleaning process of electronplate and metal activation process, form the 1st washing bath 1a, the 2nd washing bath 1b and the 3rd washing bath 1c of washing bath 1 according to priority.The 3rd washing bath 1c is positioned at provides the feedwater side of replenishing liquid, and waste water moves to the 1st washing bath 1a in order through the 3rd washing bath 1c and the 2nd washing bath 1b.Therefore, the dustiness of the 1st washing bath 1a that is washed first by electronplate is the most serious, so process object is exactly the waste water among the 1st washing bath 1a.
On the 1st washing bath 1a in washing bath 1 upflow tube 61 is set.Upflow tube 61 is to be used for guiding the waste water of the muddiness of the 1st washing bath 1a to flow into the aqueduct of the 1st storage tank 11 of Buffer Pool 10 thereafter.
Outside washing bath 1, be provided with Buffer Pool 10 individually.Waste water among the 1st washing bath 1a of 10 pairs of muddinesses of Buffer Pool is received and is stored, and concentrates through multiple times of filtration, and Buffer Pool comprises following components: the 1st storage tank 11 that receives the waste water that overflows from the 1st washing bath 1a by upflow tube 61; 1 filtrate that can hinder the material of No. 2 filtration unit 30 work has been removed in reception from above-mentioned the 1st storage tank 11, and guiding filtrate receives the 2nd storage tank 12 of 3 filtrates of the 3rd storage tank 13 in the time of the 1st storage tank 11 and 13 overflows of the 3rd storage tank; Receive overflowing liquid in the 2nd storage tank 12 and the 3rd storage tank 13 of the water in 3 filtrate and the pickling tank 2.The concentration that is contained in the waste water in these storage tanks 11～13 is more and more higher according to the order of the 1st storage tank the 11, the 2nd storage tank the 12, the 3rd storage tank 13.
No. 1 time filtration unit 20 is arranged on from the 1st storage tank 11 on the recovery tube a of the 2nd storage tank 12, the waste water that is contained in the 1st storage tank 11 is filtered, after the meeting of removal hinders the material of the 2nd storage tank 12 waste water filterings in advance, make it flow to the 2nd storage tank 12 again, help this waste water to carry out filtering filtration unit 2 times.In order to reach this purpose, has micro-filtration etc. as No. 1 filtration unit 20.
No. 2 filtration units 30 are that the waste water to the 2nd storage tank 12 that becomes clean by No. 1 filtration unit 20 filters once more, 2 filtrates of having removed 95% above foreign matter additional liquid as the 3rd washing bath 1c is filtered, and make its concentrated solution be back to the reverse osmosis pressure type filtration unit of the 2nd storage tank 12 once more, it is connected with the water port of the 2nd storage tank 12, is arranged on the bifurcation point of recovery tube b that flows to the 3rd washing bath 1c and the recovery tube c fork that flows to the 2nd storage tank 11b.No. 2 filtration units 30 have used and can the waste water of high density highly have been filtered more than 95% continuously, and pretreatment fluid acid solution and water can be carried out isolating filtering membrane.
No. 3 filtration units 40 are that the high-concentration waste water to overflow in the 3rd storage tank 13 carries out multiple times of filtration, concentrates, concentrated solution flows back to the 3rd storage tank 13 through recovery tube d, 3 filtrates are flowed back to the reverse osmosis pressure type filtration unit of the 2nd storage tank 12 by recovery tube e, be built-in with waste water is highly filtered more than 95% continuously, the filtering membrane that foreign matter or impurity etc. can be separated from treatment solution etc.
The outlet of the 3rd storage tank 13 is provided with the 4th filtration unit 50 towards tubing (pipe) g of pickling tank 2.The 4th filtration unit 50 is the Dis with the cationic metal ionic ability in the concentrated solution that can remove 13 discharges of the 3rd storage tank.
Fig. 2 is the pretreated waste water treatment unit according to another embodiment, it is provided with return line 62 between the outlet of pickling tank 2 and the 3rd storage tank 13, to deliver to the 3rd storage tank 13 because of impurity becomes muddy spent acid, via the 3rd, 4 filtration units 40,50 filter Impurity removal, and waste water can be utilized once more.
Below, will be to utilizing above-mentioned electroplating waste processing equipment, to the water in the electroplating wastewater, describe as the acid of treatment solution and as the method that the metal ion of impurity separates, utilizes and remove.
In the 3rd washing bath 1c of washing bath 1, add and replenish liquid, and to the 2nd, the 1st washing bath 1b, in the time of the 1a overflow, by the 1st, 2,3 washing bath 1a, 1b, the order of 1c makes by electronplate to be passed through successively, and the waste water of the 1st washing bath 61 that turbidity is the highest in preprocessing process flows into the 1st storage tank 11 along upflow tube 3.This waste water is immediately through No. 1 filtration unit 20, and at first the material to the filteration that is an impediment to No. 2 filtration units 30 filters, and filters 1 filtrate that obtains thus and all is sent to the 2nd storage tank 12.
Naturally, the concentration of waste water that is mixed with the 2nd storage tank 12 of 1 filtrate will reduce.According to circumstances, with this waste water adverse current to the 1 storage tank 11, further reduce the concentration of its waste water.
Under concentration surpasses the situation of prescribed value, the waste water of the 2nd storage tank 12 is directed to filtration unit 30 No. 2 times, in the reverse osmotic pressure mode by 2 filtration procedurees.Be transferred to the 3rd washing bath 1c through No. 2 filtration unit 30 filtering 2 filtrates, waste water is utilized, and its concentrated solution is delivered to the 2nd storage tank 12 and is filtered once more.
Circulation still can't effectively be carried out under the filtering situation at No. 2 filtration units 30, with waste water outflow to the 3 storage tanks 13 in the 2nd storage tank 12.The high-concentration waste water of the 3rd storage tank 13 concentrated solution after the filtration of No. 3 filtration units 40 is sent to the 3rd storage tank 13 and filters once more, thereby 3 filtrates are sent to the concentration that the 2nd storage tank 12 reduces its waste water.
The concentration of waste water itself is just high in the 3rd storage tank 13, owing to can not bring into play function corresponding again, so this concentrated solution is difficult to directly utilize.This be because to undertaken in the pretreated process by electronplate, mix that metal-salt is arranged, the possibility of metal ion is very high.Therefore,, be necessary to remove these impurity, improve the purity of acid solution for this concentrated solution is used for pickling.
In this case, the function of the 4th filtration unit 50 is brought into play.The ion exchange resin that is built in the 4th filtration unit 50 filters the concentrated solution of the 3rd storage tank 13 that flows to pickling tank 2, removes as cationic metal-salt, metal ion, only highly purified acid solution is delivered to pickling tank 2.Therefore, the acid solution that pickling tank 2 provides is the high purity acid solution that does not almost have impurity such as moisture, metal ion, thereby can continue its pickling function.
In the pretreated waste water treatment unit of Fig. 2, although passed through the filteration of the 4th filtration unit 50, because the metal ion of remaining trace flow into pickling tank 2, perhaps undertaken in the process of pickling by electronplate to other, turbidity uprises, so spent acid is sent to the 3rd storage tank 13 by return line 62, again by the 3rd, 4 filtration units 40,50, through circulating filtration process and Impurity removal process, thereby be convenient to utilize again.
Claims (7)
1. the wastewater treatment equipment of a plating preprocessing process is characterized in that, above-mentioned pretreated waste water treatment unit comprises:
At the washing bath of forming by a plurality of washing baths that is used for preprocessing process, the shallow slot shape Buffer Pool (10) that the waste water of the washing bath that turbidity is the highest is stored;
The waste water that will be positioned at the 1st storage tank (11) filters, and is provided to No. 1 filtration unit (20) of the 2nd storage tank (12) again;
After the waste water of the 2nd storage tank (12) filtered, filtrate is delivered to the 3rd washing bath (1c), concentrated solution is delivered to No. 2 filtration units (30) of the 2nd storage tank (12);
High-concentration waste water to high the 3rd storage tank (13) of turbidity filters, and filtrate is delivered to the 2nd storage tank (12), and water of condensation is delivered to No. 3 filtration units (40) of the 3rd storage tank (13);
The concentrated solution of discharging from the 3rd storage tank (13) is filtered, remove the impurity of metal ion, metal-salt etc., only with 4th filtration unit (50) of high purity acid liquid drainage to pickling tank (2).
2. the wastewater treatment equipment of plating preprocessing process according to claim 1 is characterized in that, No. 1 filtration unit (20) uses micro-filtration.
3. the wastewater treatment equipment of plating preprocessing process according to claim 1 is characterized in that, No. 2 filtration units (30) are reverse osmosis pressure type filtration units.
4. the wastewater treatment equipment of plating preprocessing process according to claim 1 is characterized in that, No. 3 filtration units (40) are reverse osmosis pressure type filtration units.
5. the wastewater treatment equipment of plating preprocessing process according to claim 1 is characterized in that, the 3rd storage tank (13) is to be connected with pickling tank (2) by return line (62).
6. the method for wastewater treatment of a plating preprocessing process is characterized in that, above-mentioned pretreated waste water treatment process comprises the steps:
In the pretreated water washing trough of the electroplating process of forming by a plurality of washing baths, the waste water of the washing bath that wherein turbidity is the highest is imported step to the 1st storage tank of Buffer Pool;
Waste water to the 1st storage tank carries out 1 filtration, is transplanted on 1 filtration step of the 2nd storage tank again;
Waste water to the 2nd storage tank filters, and filtrate is delivered to the 2nd washing bath, concentrated solution is back to 2 filtration steps of the 2nd storage tank;
High-concentration waste water to the 3rd storage tank filters, and filtrate is delivered to the 2nd storage tank, condensed water is delivered to 3 filtration steps of the 3rd storage tank;
Remove the 4th filtration step that high purity acid solution behind the impurity such as metal-salt, metal ion is delivered to pickling tank in the high-concentration waste water with the 3rd storage tank.
7. the method for wastewater treatment of plating preprocessing process according to claim 6, it is characterized in that, above-mentioned pretreated waste water treatment process has also comprised the 3rd storage tank of the waste water of pickling tank directly being delivered to Buffer Pool, by filtering and impurity is removed process, only with the high purity acid solution again drainage to the step of pickling tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710004947XA CN101244876A (en) | 2007-02-13 | 2007-02-13 | Apparatus for treating waste water for plating preprocessing process and processing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA200710004947XA CN101244876A (en) | 2007-02-13 | 2007-02-13 | Apparatus for treating waste water for plating preprocessing process and processing method |
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| CN101244876A true CN101244876A (en) | 2008-08-20 |
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| CNA200710004947XA Pending CN101244876A (en) | 2007-02-13 | 2007-02-13 | Apparatus for treating waste water for plating preprocessing process and processing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424493A (en) * | 2011-12-15 | 2012-04-25 | 佛山市邦普循环科技有限公司 | Apparatus for treating iron-containing acid waste water generated from power battery disassembly, and method thereof |
| CN102872681A (en) * | 2011-07-14 | 2013-01-16 | 天津市绿净源环保科技有限公司 | Reuse method of acid gas treatment wastewater |
| CN103055683A (en) * | 2013-01-14 | 2013-04-24 | 无锡市星亿涂装环保设备有限公司 | Electroplating acid-base waste gas treatment device based on treating waste with waste |
| CN104619653A (en) * | 2012-08-10 | 2015-05-13 | 本田技研工业株式会社 | Waste liquid recycling system |
| CN111024912A (en) * | 2019-12-27 | 2020-04-17 | 重庆国环绿源科技有限公司 | Ship wastewater pretreatment type detection device |
-
2007
- 2007-02-13 CN CNA200710004947XA patent/CN101244876A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102872681A (en) * | 2011-07-14 | 2013-01-16 | 天津市绿净源环保科技有限公司 | Reuse method of acid gas treatment wastewater |
| CN102424493A (en) * | 2011-12-15 | 2012-04-25 | 佛山市邦普循环科技有限公司 | Apparatus for treating iron-containing acid waste water generated from power battery disassembly, and method thereof |
| CN102424493B (en) * | 2011-12-15 | 2013-06-26 | 佛山市邦普循环科技有限公司 | Apparatus for treating iron-containing acid waste water generated from power battery disassembly, and method thereof |
| CN104619653A (en) * | 2012-08-10 | 2015-05-13 | 本田技研工业株式会社 | Waste liquid recycling system |
| CN103055683A (en) * | 2013-01-14 | 2013-04-24 | 无锡市星亿涂装环保设备有限公司 | Electroplating acid-base waste gas treatment device based on treating waste with waste |
| CN111024912A (en) * | 2019-12-27 | 2020-04-17 | 重庆国环绿源科技有限公司 | Ship wastewater pretreatment type detection device |
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Open date: 20080820 |