CN103523947A - Solder removing waste liquid regeneration treatment method - Google Patents
Solder removing waste liquid regeneration treatment method Download PDFInfo
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- CN103523947A CN103523947A CN201310376778.8A CN201310376778A CN103523947A CN 103523947 A CN103523947 A CN 103523947A CN 201310376778 A CN201310376778 A CN 201310376778A CN 103523947 A CN103523947 A CN 103523947A
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- waste liquid
- removing waste
- solder removing
- treatment method
- tin
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Abstract
The invention provides a solder removing waste liquid regeneration treatment method. The solder removing waste liquid regeneration treatment method comprises the following steps: (1) adding 20-40g/L of reduced iron powder to solder removing waste liquid; (2) adding an HMCA (heavy metal collecting agent) which accounts for 10%-20% of the total volume dose of solder removing waste liquid; (3) adding a flocculating agent so as to accelerate the sedimentation of the solder removing waste liquid, wherein the volume ratio of the flocculating agent to the heavy metal collecting agent is 1: 1; (4) filtering; (5) analyzing components in the waste liquid; (6) adding components needing to be added to the waste liquid; and (7) recycling. The solder removing waste liquid regeneration treatment method has the beneficial effects that the waste liquid is analyzed and can be recycled and regenerated by determining the components needing to be added. The solder removing waste liquid regeneration treatment method has relatively low requirements on production equipment and is environmentally-friendly and low in production cost; regenerated liquid medicine can meet the production requirements of enterprises; the whole production technology can be used for realizing the recycling of the material and the zero release and has good economic, environmental and social benefits.
Description
Technical field
The present invention relates to a kind of regeneration treating method of waste liquid, is a kind of regeneration treating method that moves back tin waste liquid specifically.
Background technology
Along with the fast development of China's electronic industry, emerged in large numbers a large amount of PCB source mill, someone adds up, and China consumes tin stripper 6*10 every year
4m
3, and with the speed increase of 15%-18%.If so huge tin stripper amount, without processing discharge arbitrarily, will inevitably cause great pollution to water resources and ecotope.
The spent acid composition generally moving back in tin waste liquid is mainly rare nitric acid, iron nitrate, and treating method generally has five kinds: neutralisation, distillation method, removal metal ion recycle method, diffusive dialysis method and solvent extration.But owing to moving back, tin component of effluent is complicated, has severe corrosive, causes difficult treatment, and cost is high, and particularly for the medium-sized and small enterprises of some technology and shortage of funding, the processing of moving back tin waste liquid has become the bottleneck of enterprise development especially.
Summary of the invention
The object of the invention is in prior art, to process pcb board and move back existing defect in tin waste liquid in order to solve, provide a kind of regeneration treating method that moves back tin waste liquid to solve the problems referred to above.
To achieve these goals, technical scheme of the present invention is as follows:
A regeneration treating method that moves back tin waste liquid, is characterized in that, comprises the following steps:
(1) to moving back the reduced iron powder that adds 20-40g/L in tin waste liquid;
(2) add again the HMCA heavy metal chelating agent of the 10%-20% that moves back tin waste liquid volume total amount;
(3) add flocculation agent to make it accelerate sedimentation, the volume ratio of the consumption of described flocculation agent and heavy metal chelating agent consumption is 1:1;
(4) filter;
(5) composition in analysis;
(6) supplement in waste liquid and need supplementary composition;
(7) reprocessing cycle is used.
Above-mentioned a kind of regeneration treating method that moves back tin waste liquid, is characterized in that, in described step (1), to moving back the reduced iron powder that adds 30g/L in tin waste liquid.
Beneficial effect of the present invention is: by analysis, the definite composition that need to add can be realized cyclic regeneration to waste liquid.The method requires lower, environmental friendliness, production cost low to production unit, and regrowth liquid medicine can meet enterprise's need of production, and whole one-tenth production art is realized the recycle of material, and zero release, economy, environmental and social benefits are good.
Embodiment
For making that constitutional features of the present invention and the effect reached are had a better understanding and awareness, in order to preferred embodiment, coordinate detailed explanation, be described as follows:
A regeneration treating method that moves back tin waste liquid, is characterized in that, comprises the following steps:
(1) to moving back the reduced iron powder that adds 20-40g/L in tin waste liquid, in one of them preferred implementation of the present invention, to moving back the reduced iron powder that adds 30g/L in tin waste liquid, the nitric acid reaction of reduced iron powder in moving back tin waste liquid reduces its acidity, prevents that high density nitric acid from affecting the treatment effect of next step HMCA heavy metal chelating agent;
(2) add again the HMCA heavy metal chelating agent of the 10%-20% that moves back tin waste liquid volume total amount, HMCA heavy metal chelating agent is realized the separation of tin, copper, its mechanism is mainly: HMCA heavy metal chelating agent is a kind of Polymeric complexes, can with tin, copper generation chelatropic reaction coagulation;
(3) add flocculation agent to make it accelerate sedimentation, improve sedimentary settling velocity, the volume ratio of the consumption of flocculation agent and heavy metal chelating agent consumption is 1:1;
(4) filter: filter and move back the impurity in tin waste liquid;
(5) analyze and move back the composition in tin waste liquid, determine to supplement which composition;
(6) supplement in waste liquid and need supplementary composition;
(7) reprocessing cycle is used.
The tin waste liquid that moves back that ，Dui producer provides in actually operating is processed, and the composition that moves back tin waste liquid is as follows:
| Title | Acid equivalent (mol/L) | Cu(g/L) | Fe(g/L) | Sn(g/L) |
| Raw wastewater | 4.6 | 5.3 | 2.6 | 117.5 |
1, get and move back tin waste liquid 50ml, add respectively 20g/L, 30g/L, 40g/L reduced iron powder; Add 20%HMCA heavy metal chelating agent; Add 10ml flocculation agent; Through filtering, move back tin effluent analysis again, determine that composition and the amount that need to add can realize cyclic regeneration, interpretation is as follows:
| Title | Acid equivalent (mol/L) | Cu(g/L) | Fe(g/L) | Sn(g/L) |
| Raw wastewater | 4.6 | 5.3 | 2.6 | 117.5 |
| Iron powder (20g/L) | 1.8 | 0.25 | 0 | 0 |
| Iron powder (30g/L) | 2.3 | 1.14 | 0.07 | 0 |
| Iron powder (40g/L) | 1.2 | 0.19 | 0.02 | 0 |
Main component due to tin stripper: iron nitrate, concentrated nitric acid, so retain as much as possible its acid equivalent, iron level and the more tin of going out when tin waste liquid is moved back in processing, the object that adds in addition reduced iron powder is to prevent the too high HMCA of the impact sedimentation effect of acidity.
Add after HMCA, produce very soon precipitation, the content of tin, iron, copper obviously declines, and data presentation shows according to acid equivalent value, removal ion situation, and the concentration of reduced iron powder is best at 30g/L, and its treatment effect is fine, and tin is all processed clean.
2, get and move back tin waste liquid 50ml, add 30g/L reduced iron powder; Add respectively again 10%, 20%, 30%HMCA heavy metal chelating agent; Add 10ml flocculation agent; Through filtering, move back tin effluent analysis again, determine that composition and the amount that need to add can realize cyclic regeneration, interpretation is as follows:
Main component due to tin stripper: iron nitrate, concentrated nitric acid, so retain as much as possible its acid equivalent, iron level and the more tin of going out when tin waste liquid is moved back in processing, the object that adds in addition reduced iron powder is to prevent the too high HMCA of the impact sedimentation effect of acidity.
Add after HMCA, produce very soon precipitation, the content of tin, iron, copper obviously declines, and data presentation shows according to acid equivalent value, removal ion situation, and the concentration of HMCA is best at 10%-20%, and its treatment effect is fine, and tin is all processed clean.
3, get and move back tin waste liquid 50ml, add 30g/L reduced iron powder; Add again 20%HMCA heavy metal chelating agent; Add 5ml, 10ml, 15ml flocculation agent; Through filtering, move back tin effluent analysis again, determine that composition and the amount that need to add can realize cyclic regeneration, interpretation is as follows:
| Title | Acid equivalent (mol/L) | Cu(g/L) | Fe(g/L) | Sn(g/L) |
| Raw wastewater | 4.6 | 5.3 | 2.6 | 117.5 |
| 5ml flocculation agent | 1.8 | 0.32 | 0.048 | 0 |
| 10ml flocculation agent | 1.7 | 0.19 | 0.041 | 0 |
| 15ml flocculation agent | 1.5 | 0.32 | 0.034 | 0 |
Main component due to tin stripper: iron nitrate, concentrated nitric acid, so retain as much as possible its acid equivalent, iron level and the more tin of going out when tin waste liquid is moved back in processing, the object that adds in addition reduced iron powder is to prevent the too high HMCA of the impact sedimentation effect of acidity.
Add after HMCA, produce very soon precipitation, the content of tin, iron, copper obviously declines, and data presentation shows according to acid equivalent value, removal ion situation, and the amount that drops into flocculation agent is controlled at 10ml, and its treatment effect is best, and tin is all processed totally.
Beneficial effect of the present invention is: by analysis, the definite composition that need to add can be realized cyclic regeneration to waste liquid.The method requires lower, environmental friendliness, production cost low to production unit, and regrowth liquid medicine can meet enterprise's need of production, and whole one-tenth production art is realized the recycle of material, and zero release, economy, environmental and social benefits are good.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what in above-described embodiment and specification sheets, describe is principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in claimed scope of the present invention.The protection domain that the present invention requires is defined by appending claims and equivalent thereof.
Claims (2)
1. a regeneration treating method that moves back tin waste liquid, is characterized in that, comprises the following steps:
(1) to moving back the reduced iron powder that adds 20-40g/L in tin waste liquid;
(2) add again the HMCA heavy metal chelating agent of the 10%-20% that moves back tin waste liquid volume total amount;
(3) add flocculation agent to make it accelerate sedimentation, the volume ratio of the consumption of described flocculation agent and heavy metal chelating agent consumption is 1:1;
(4) filter;
(5) composition in analysis;
(6) supplement in waste liquid and need supplementary composition;
(7) reprocessing cycle is used.
2. a kind of regeneration treating method that moves back tin waste liquid according to claim 1, is characterized in that, in described step (1), to moving back the reduced iron powder that adds 30g/L in tin waste liquid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310376778.8A CN103523947A (en) | 2013-08-26 | 2013-08-26 | Solder removing waste liquid regeneration treatment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310376778.8A CN103523947A (en) | 2013-08-26 | 2013-08-26 | Solder removing waste liquid regeneration treatment method |
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| CN103523947A true CN103523947A (en) | 2014-01-22 |
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| CN201310376778.8A Pending CN103523947A (en) | 2013-08-26 | 2013-08-26 | Solder removing waste liquid regeneration treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162456A (en) * | 2014-08-05 | 2014-11-26 | 洛阳昊海工贸有限公司 | Cleaning liquid for regenerating denitration catalyst and cleaning method |
Citations (5)
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|---|---|---|---|---|
| DD250554A1 (en) * | 1984-08-21 | 1987-10-14 | Karl Marx Stadt Tech Hochschul | METHOD FOR DECORATING IRON MATERIALS |
| CN1288075A (en) * | 2000-09-21 | 2001-03-21 | 长沙意贯环保高新技术有限公司 | Circulation and regeneration technology for non-fluoride type etching agent |
| CN1309194A (en) * | 2000-11-28 | 2001-08-22 | 华东理工大学 | Process for regenerating waste etching liquid containing Ni and FeCl3 and recovering Ni |
| TW200417626A (en) * | 2003-03-03 | 2004-09-16 | Amia Co Ltd | Treatment method of waste tin lead stripping solution |
| CN202626296U (en) * | 2012-04-09 | 2012-12-26 | 深圳市朗坤环保有限公司 | Recycling device of waste tin-stripping liquid |
-
2013
- 2013-08-26 CN CN201310376778.8A patent/CN103523947A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD250554A1 (en) * | 1984-08-21 | 1987-10-14 | Karl Marx Stadt Tech Hochschul | METHOD FOR DECORATING IRON MATERIALS |
| CN1288075A (en) * | 2000-09-21 | 2001-03-21 | 长沙意贯环保高新技术有限公司 | Circulation and regeneration technology for non-fluoride type etching agent |
| CN1309194A (en) * | 2000-11-28 | 2001-08-22 | 华东理工大学 | Process for regenerating waste etching liquid containing Ni and FeCl3 and recovering Ni |
| TW200417626A (en) * | 2003-03-03 | 2004-09-16 | Amia Co Ltd | Treatment method of waste tin lead stripping solution |
| CN202626296U (en) * | 2012-04-09 | 2012-12-26 | 深圳市朗坤环保有限公司 | Recycling device of waste tin-stripping liquid |
Non-Patent Citations (3)
| Title |
|---|
| 刘存海等: "合成重金属螯合剂处理镀镍废水的应用研究", 《电镀与精饰》 * |
| 刘存海等: "重金属螯合剂的制备及镀铬废水中Cr3+的去除", 《化工环保》 * |
| 李德良等: "印刷线路板退焊锡废水再生利用研究", 《水处理技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162456A (en) * | 2014-08-05 | 2014-11-26 | 洛阳昊海工贸有限公司 | Cleaning liquid for regenerating denitration catalyst and cleaning method |
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Application publication date: 20140122 |