CN102115282A - Method for recycling copper smelting wastewater - Google Patents
Method for recycling copper smelting wastewater Download PDFInfo
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- CN102115282A CN102115282A CN 201110022833 CN201110022833A CN102115282A CN 102115282 A CN102115282 A CN 102115282A CN 201110022833 CN201110022833 CN 201110022833 CN 201110022833 A CN201110022833 A CN 201110022833A CN 102115282 A CN102115282 A CN 102115282A
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Abstract
The invention relates to the technical field of recycling of industrial wastewater, in particular to a method for recycling copper smelting wastewater. The method has a process principle that copper smelting wastewater is treated by utilizing the combination process of one-step coagulation sedimentation and ion exchange, and effluent quality meets the specifications of water quality standard (GB50050-1995) for circulating cooling water, urban sewage recycling and urban miscellaneous water quality (GB/T18920-2002) and urban sewage recycling landscape environment water quality (GB/T18921-2002). The method is carried out by starting from the source of wastewater treatment and used for preparing recycled water according with requirements through simple procedures and lower operation cost. The method has a low treatment cost and a reliable treatment effect and is easy to popularize. With the technology, the method for recycling copper smelting wastewater, with low cost, high performance and high added values, can be provided, and has wide market prospects and considerable social and economic benefits.
Description
Technical field
The present invention relates to the recycling processing technique field of trade effluent, be specifically related to a kind of process for reclaiming of copper smelting wastewater.
Background technology
Copper is smelted in the production process, has produced mass production waste water, respectively from each operation of producing: between concentrate drying, smelting furnace, converter, anode furnace, generator car, oxygen generating station, sulfuric acid plant, potroom, slag be cold etc.Main pollutant component in the waste water is soda acid, suspended substance, heavy metal ion (as Cu, Pb, Cd, As etc.) etc.
In the copper smelting plant wastewater treatment process, be a large amount of acid waste water that neutralizes, traditional lime iron salt method has added a large amount of milk of lime, ferrous sulfate, has so just caused final outflow water Ca2+ content higher (about 600-1000mg/L), and total dissolved solid (salt) is also higher; In addition, the treatment scheme of traditional lime iron salt method is tediously long, operational management is complicated, cost is higher relatively, and handled water can only accomplish qualified discharge substantially, and does not reach the water quality standard of reuse water.Therefore, how to improve one of the focus that technical study is domestic and international researcher, engineering technical personnel studied of copper smelting wastewater Treatment for Reuse.
On the Treatment for Reuse research of copper smelting wastewater and using, studying more at present is to adopt membrane separation process.Membrane separation technique is by utilizing film that special organic polymer or inorganic materials make to the chemosmotic difference of each components selection in the mixture, with outside energy or chemical potential difference be impellent to two-pack or multi-component liquid separate, classification, purification and rich long-pending technology, widely used in advanced treatment of wastewater mainly is micro-filtration (MF), ultrafiltration (UF), electrodialysis, nanofiltration and reverse osmosis etc.
Because the film that membrane separation process adopted is contaminated easily, working cost is higher, investment cost is also very high, so limited this technology in industrial application.
Summary of the invention
At the deficiencies in the prior art, the object of the present invention is to provide a kind of process for reclaiming of copper smelting wastewater, its technological principle is to utilize the combination process of a step coagulating sedimentation+ion-exchange to handle waste water.
Wherein, one step coagulating sedimentation at first adopts the method that adds milk of lime that the pH value of waste water is adjusted to 7.5-8.0, and then add coagulant polymeric aluminium chloride and coagulant aids polyacrylamide successively, wherein the dosage of polymerize aluminum chloride is: 20-40mg/L, more excellent dosage is: 25-35mg/L, and the dosage of polyacrylamide is: 5-10mg/L, more excellent dosage is: 5-8mg/L, the coagulating time is: 20-30min, the solid-liquid separation sedimentation time is: 70-90min.
After supernatant liquor and the precipitate and separate, supernatant liquor spent ion exchange resin is again cooked further processing, successively through storng-acid cation exchange resin and strong basicity (or weakly alkaline) anion exchange process, wherein the filtering velocity of Zeo-karb is: 10-15m/h, the filtering velocity of anionite-exchange resin is: 6-15m/h.Produce the water cycle normal, water outlet TDS＜150mg/L, hardness (in lime carbonate)＜50mg/L, other water-quality guideline also can reach corresponding quality of reused water standard.
As fully visible, the process for reclaiming of a kind of copper smelting wastewater of the present invention can be realized comprehensive treating process and reach the quality of reused water standard the complicated copper smelting wastewater of composition, and processing cost is low, treatment effect is reliable, easily promote, have vast market prospect, considerable economic and social benefit.
Compared with prior art, the inventive method has following advantage:
1, copper smelting wastewater process for reclaiming of the present invention is from the source of wastewater treatment, by simple process flow, lower working cost, makes satisfactory reuse water.Overcome the shortcoming that traditional copper smelting wastewater is handled: traditional copper smelting wastewater treatment process adopt more lime iron salt method+multistep solid-liquid separation combination process, treatment scheme is tediously long, operational management is complicated, cost is higher relatively, and handled water can only accomplish qualified discharge substantially, do not reach the quality of reused water standard.
2, technology of the inventive method and flow process compactness, easy to operate are easy to realize industrial applications.The selected device of the present invention can be realized equipmentization, reduce and take up an area of and the saving energy consumption, and capital cost is reduced greatly; Simultaneously, the Treatment for Reuse of waste water easily is automated control, personnel operation is easy, and good industrial applications prospect is arranged.
Embodiment
Below in conjunction with specific embodiment technical scheme of the present invention is described further, but protection scope of the present invention is not limited to these embodiment.Every do not deviate from the change of the present invention design or be equal to substitute be included within protection scope of the present invention.
Embodiment 1
Process object: the comprehensive wastewater that Daye Nonferrous Metal Co.,Ltd's copper smelting plant is discharged.
Influent quality: pH:6.5; SS:200mg/L; Cu:12.6mg/L; As:8.25mg/L;
Pb:2.23mg/L; Cd:1.85mg/L; Hardness (in lime carbonate): 1100.5mg/L;
Total dissolved solid (TDS): 1614.3mg/L.
Main technologic parameters:
At first add milk of lime waste water ph is adjusted to 8.0;
Coagulant polymeric aluminium chloride (PAC) dosage: 25mg/L;
Coagulant aids polyacrylamide (PAM, cationic) dosage: 5mg/L;
The coagulating time: 30min;
Sedimentation time: 70min;
The further treatment of selected spent ion exchange resin combination of the supernatant liquor after the solid-liquid separation: 001 * 7 strongly acidic styrene type cation exchange resin+D202 macroporous strong basic styrene series type anionite-exchange resin;
The filtering velocity of Zeo-karb: 12m/h;
The filtering velocity of anionite-exchange resin: 7.8m/h.
Effluent quality: pH:7.6; SS:8.5mg/L; Cu:0.12mg/L; As:0.09mg/L;
Pb:0.08mg/L; Cd:0.06mg/L; Hardness (in lime carbonate): 10.3mg/L;
Total dissolved solid (TDS): 56.2mg/L all reaches respective standard (water quality standard of recirculated cooling water (GB50050-1995), " urban sewage reutilization city miscellaneous water water quality " (GB/T18920-2002), " urban sewage reutilization water for scenic environment use water quality " (GB/T18921-2002)).
Embodiment 2
Process object: the comprehensive wastewater that Daye Nonferrous Metal Co.,Ltd's copper smelting plant is discharged.
Influent quality: pH:6.0; SS:240mg/L; Cu:22.5mg/L; As:5.31mg/L;
Pb:1.98mg/L; Cd:1.63mg/L; Hardness (in lime carbonate): 880.3mg/L;
Total dissolved solid (TDS): 1236.2mg/L.
Main technologic parameters:
At first add milk of lime waste water ph is adjusted to 8.0;
Coagulant polymeric aluminium chloride dosage: 30mg/L;
Coagulant aids polyacrylamide (PAM, cationic) dosage: 6mg/L;
The coagulating time: 25min;
Sedimentation time: 80min;
The further treatment of selected spent ion exchange resin combination of the supernatant liquor after the solid-liquid separation:
D001 large hole strong acid styrene system cation exchange resin+D301SC macroreticular weakly base styrene series anion exchange resin;
The filtering velocity of Zeo-karb: 13m/h;
The filtering velocity of anionite-exchange resin: 14m/h.
Effluent quality: pH:7.8; SS:6.9mg/L; Cu:0.23mg/L; As:0.08mg/L;
Pb:0.07mg/L; Cd:0.07mg/L; Hardness (in lime carbonate): 8.7mg/L;
Total dissolved solid (TDS): 48.5mg/L all reaches respective standard (water quality standard of recirculated cooling water (GB50050-1995), " urban sewage reutilization city miscellaneous water water quality " (GB/T18920-2002), " urban sewage reutilization water for scenic environment use water quality " (GB/T18921-2002)).
Embodiment 3
Process object: the comprehensive wastewater that Daye Nonferrous Metal Co.,Ltd's copper smelting plant is discharged.
Influent quality: pH:6.2; SS:280mg/L; Cu:25.3mg/L; As:5.25mg/L;
Pb:2.83mg/L; Cd:1.05mg/L; Hardness (in lime carbonate): 1521.5mg/L;
Total dissolved solid (TDS): 2017.2mg/L.
Main technologic parameters:
At first add milk of lime waste water ph is adjusted to 7.5;
Coagulant polymeric aluminium chloride dosage: 35mg/L;
Coagulant aids polyacrylamide (PAM, cationic) dosage: 8mg/L;
The coagulating time: 20min;
Sedimentation time: 90min;
The further treatment of selected spent ion exchange resin combination of the supernatant liquor after the solid-liquid separation:
D001 large hole strong acid styrene system cation exchange resin+201 * 7 strongly basic anion exchange resins;
The filtering velocity of Zeo-karb: 14m/h;
The filtering velocity of anionite-exchange resin: 6.8m/h.
Effluent quality: pH:7.8; SS:9.3mg/L; Cu:0.32mg/L; As:0.09mg/L;
Pb:0.07mg/L; Cd:0.05mg/L; Hardness (in lime carbonate): 15.3mg/L;
Total dissolved solid (TDS): 90.8mg/L all reaches respective standard (water quality standard of recirculated cooling water (GB50050-1995), " urban sewage reutilization city miscellaneous water water quality " (GB/T18920-2002), " urban sewage reutilization water for scenic environment use water quality " (GB/T18921-2002)).
Claims (6)
1. the process for reclaiming of a copper smelting wastewater, its step is as follows:
At first the pH value of waste water is transferred to 7.5-8.0 with milk of lime;
Add the coagulant polymeric aluminium chloride of 20-40mg/L and the coagulant aids cationic-type polyacrylamide of 5-10mg/L then successively, coagulating 20-30min precipitates solid-liquid separation, sedimentation time 70-90min then;
Get supernatant liquor at last and cross Zeo-karb and anionite-exchange resin successively, the filtering velocity of wherein crossing Zeo-karb and anionite-exchange resin is respectively 10-15m/h and 6-15m/h.
2. the method for claim 1, it is characterized in that: described Zeo-karb is a storng-acid cation exchange resin.
3. method as claimed in claim 1 or 2 is characterized in that: described anionite-exchange resin is strongly basic anion exchange resin.
4. method as claimed in claim 1 or 2 is characterized in that: described anionite-exchange resin is weak base anion-exchange resin.
5. method as claimed in claim 1 or 2 is characterized in that: the dosage of described coagulant polymeric aluminium chloride is 25-35mg/L.
6. method as claimed in claim 1 or 2 is characterized in that: the dosage of described coagulant aids cationic-type polyacrylamide is 5-8mg/L.
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| CN201110022833A CN102115282B (en) | 2011-01-20 | 2011-01-20 | Method for recycling copper smelting wastewater |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826684A (en) * | 2012-09-14 | 2012-12-19 | 上海问鼎水处理工程有限公司 | Method for removing lead ions in sewage |
| CN102874986A (en) * | 2012-10-19 | 2013-01-16 | 上海化学试剂研究所 | Treatment method for wastewater containing organic matters during production of N-phenyl maleimide |
| CN103145227A (en) * | 2013-03-25 | 2013-06-12 | 西安德奇水处理有限公司 | Flocculation treatment method for copper-containing wastewater |
| CN103435184A (en) * | 2013-08-26 | 2013-12-11 | 苏州富奇诺水治理设备有限公司 | Heavy metal-containing wastewater treatment method |
| CN108117213A (en) * | 2017-12-18 | 2018-06-05 | 天津膜天膜科技股份有限公司 | A kind of metal Copper making waste discharge recovery process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549924A (en) * | 2008-03-31 | 2009-10-07 | 洪增良 | Three-stage type electroplating waste water treatment method |
| CN101746906A (en) * | 2008-12-03 | 2010-06-23 | 五邑大学 | Method for processing electroplating wastewater with heavy metal ions |
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2011
- 2011-01-20 CN CN201110022833A patent/CN102115282B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549924A (en) * | 2008-03-31 | 2009-10-07 | 洪增良 | Three-stage type electroplating waste water treatment method |
| CN101746906A (en) * | 2008-12-03 | 2010-06-23 | 五邑大学 | Method for processing electroplating wastewater with heavy metal ions |
Non-Patent Citations (1)
| Title |
|---|
| 《吉林建筑工程学院学报》 19990930 孙守慧等 阳离子型聚丙烯酰胺的混凝、助凝及助滤作用 第37-38、52页 1 , 第3期 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826684A (en) * | 2012-09-14 | 2012-12-19 | 上海问鼎水处理工程有限公司 | Method for removing lead ions in sewage |
| CN102874986A (en) * | 2012-10-19 | 2013-01-16 | 上海化学试剂研究所 | Treatment method for wastewater containing organic matters during production of N-phenyl maleimide |
| CN102874986B (en) * | 2012-10-19 | 2015-05-13 | 上海化学试剂研究所 | Treatment method for wastewater containing organic matters during production of N-phenyl maleimide |
| CN103145227A (en) * | 2013-03-25 | 2013-06-12 | 西安德奇水处理有限公司 | Flocculation treatment method for copper-containing wastewater |
| CN103435184A (en) * | 2013-08-26 | 2013-12-11 | 苏州富奇诺水治理设备有限公司 | Heavy metal-containing wastewater treatment method |
| CN108117213A (en) * | 2017-12-18 | 2018-06-05 | 天津膜天膜科技股份有限公司 | A kind of metal Copper making waste discharge recovery process |
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| CN102115282B (en) | 2012-10-24 |
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