CN102424457A - Treating system for industrial wastewater containing heavy metal and treating method thereof - Google Patents
Treating system for industrial wastewater containing heavy metal and treating method thereof Download PDFInfo
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- CN102424457A CN102424457A CN2011103318296A CN201110331829A CN102424457A CN 102424457 A CN102424457 A CN 102424457A CN 2011103318296 A CN2011103318296 A CN 2011103318296A CN 201110331829 A CN201110331829 A CN 201110331829A CN 102424457 A CN102424457 A CN 102424457A
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Abstract
The invention provides a treating system for industrial wastewater containing heavy metal. The system comprises an electrolytic tank (1); the electrolytic tank (1) comprises a first trough wall (11) and a second trough wall (12), which are arranged to be opposite; positive plates (2) and negative plates (3) are staggerly arranged in the electrolytic tank (1), the first ends of the positive plates (2) are fixed on the first trough wall (11), the first ends of the negative plates (3) are fixed on the second trough wall (12), and each negative plate (3) is a starting sheet of a tri-dimensional network structure. According to the invention, because of utilization of the tri-dimensional network structure in the treating system, the negative starting sheets have substantially improved capacity in bearing stress, and the problem of short circuit of cathodes and anodes caused by cracking of the negative plates is avoided; the operation of plate stripping is omitted. The invention also provides a treating method for industrial wastewater containing heavy metal by using the treating system.
Description
Technical field
The present invention relates to Industrial Wastewater Treatment and resource and reclaim the field, especially, relate to a kind of treatment system of low levels heavy metal industrial effluent.In addition, the invention still further relates to a kind of treatment process that comprises the low levels heavy metal industrial effluent of above-mentioned treatment system.
Background technology
Trade effluent is one of important source of current environment pollution, and various countries attach great importance to the processing of trade effluent and the recycling of resource.At present, the treatment process to the acid trade waste of heavy metal ion content below 15 grams per liters mainly contains two kinds: one of which, neutralization precipitation method; Two, electrodeposition sedimentation.
The neutralization precipitation method is to handle the most general technology of low levels heavy metal trade waste at present; Its process characteristic is that technical maturity is simple; Heavy metal trade waste after can guaranteeing to handle reaches environmental emission standard; But fatal deficiency below also existing: utilizing the neutralization precipitation method to handle the resulting product of heavy metal ion trade waste is that the metals ion grade has only several percentage points mud, and its economic worth is had a greatly reduced quality; As will arrive the contained heavy metal of above-mentioned mud utilized again and must carry out purification processes, this certainly will cause second environmental pollution; As to heavy metal ion content be reached environmental emission standard at the following heavy metal trade waste of 15 grams per liters through the neutralization precipitation method, production cost is higher.
The electrodeposition sedimentation is handled the acid trade waste of heavy metal ion content below 15 grams per liters and is mainly contained two kinds: one, dull and stereotyped electrodeposition process, two, strengthen electrodeposition process.Wherein, can only obtain the spongy metal settling on the dull and stereotyped electrodeposition process negative electrode, since higher to the anti-oxidation processing cost of spongy metal, so dull and stereotyped electrodeposition process can only obtain metal content at the product below 80%.Wherein, Strengthening electrodeposition process is comparatively advanced in the market treatment process; Its ultimate principle is through the particular design to electrodeposition equipment; Strengthen the mass transfer of metals ion in the electrolytic deposition process, reduce to greatest extent owing to metal ions in waste liquor content is crossed the low concentration polarization that causes, the adding through special additive simultaneously makes metals ion on negative electrode, separate out and guarantee high cathode current efficiency with the fine crystallization of densification.At present, the subject matter that in production application, exists of this technology is: the device fabrication cost is higher; Floor space is bigger; The additive cost that from waste liquid, extracts one ton of amount of metal is higher; There is certain limitation in process range, has only metal ion content its economic benefit when 6 grams per liters are above just apparent in view; When the metal ion content in the waste liquid is reduced to 1 grams per liter when following, its cathode efficiency will decline to a great extent, and cause production cost obviously to propose; Stable equipment operation property is relatively poor; Device security is not high, and cathode deposition exists cracking to cause the possibility of anode and cathode short circuit; The labour intensity of production operation is bigger, and the operation of stripping plate needs to accomplish through manual operations.
Summary of the invention
The object of the invention is to provide a kind of simple in structure, high treatment system that contains heavy metal industrial effluent of metal purity of reclaiming, abolishes to solve existing industry that treatment facility cost metal purity high, that reclaim is low, the technical problem of complicated operation.
For realizing above-mentioned purpose; The invention provides a kind of treatment system that contains heavy metal industrial effluent, comprising: electrolyzer, this electrolyzer comprise first cell wall and second cell wall that is oppositely arranged; Be staggeredly equipped with positive plate and negative plate in the electrolyzer; First end of positive plate is fixed on first cell wall, and first end of negative plate is fixed on second cell wall, and second end of each negative plate is between two adjacent positive plates; Each negative plate is the beginning pole plate of tridimensional network.
Further, positive plate is the positive plate of netted titanium coating structure.
Further, treatment system also comprises the treatment solution mixing section, and the treatment solution mixing section is communicated with electrolyzer through the connecting pipe of a band valve.
Further, be provided with stirrer in the treatment solution mixing section.
Further, treatment system also comprises circulation groove and middle turn trough, and circulation groove is communicated with the treatment solution mixing section, and circulation groove can inject pending liquid with controlling in the treatment solution mixing section; Middle turn trough is connected with the upper end of electrolyzer.
Further, between circulation groove and treatment solution mixing section, be provided with recycle pump.
Further, middle turn trough and circulation groove are communicated with, and between middle turn trough and circulation groove, are provided with reflux pump.
A kind of treatment process that contains heavy metal industrial effluent; Use above-mentioned treatment system; Concrete steps are: the first step, a certain amount of pending solution is injected in the circulation groove, and add an amount of additive; ON cycle pump, stirrer and reflux pump are evenly distributed additive pending liquid circular flow 10～20 minutes in pending liquid; Second step made the electrolyzer energising, and when the concentration of metal ions of electrolytic solution was greater than or equal to 2 grams per liters, cathode current density was controlled at 370A/m2～450A/m2; When the concentration of metal ions of electrolytic solution less than 2 grams per liters and when being greater than or equal to 500ppm, cathode current density is controlled at 320A/m2～370A/m2; When the concentration of metal ions of electrolytic solution during less than 500ppm, cathode current density is controlled at 270A/m2～320A/m2; The 3rd step when the concentration of metal ions of electrolytic solution during less than 100ppm, finished electrolysis, took out negative plate, and the negative electrode starting sheet of packing into new.
Further, the additive that adds in the first step is a macromolecular organic compound.This macromolecular organic compound is preferably gelatine, dried network is plain or thiocarbamide.
Further, the monitoring of the concentration of metal ions of electrolytic solution is that whenever (Chinese of EDTA was: YD 30) electrolytic solution is carried out titrimetry at a distance from 1.5～2.5 hours use EDTA in second step.
The present invention has following beneficial effect:
1, treatment system of the present invention is owing to use the negative electrode beginning pole plate of tridimensional network, and the ability that meets with stresses of this negative electrode beginning pole plate improves greatly, has avoided the negative plate cracking to cause the anode and cathode problem of short-circuit; Make the metal precipitate that in electrolytic process, is adsorbed on the negative electrode beginning pole plate can pass this negative electrode beginning pole plate; Thereby negative plate need not rotation or moves in electrolytic process; The precipitate that is collected at negative electrode beginning pole plate both sides combines securely, has improved the stability and the safety performance of equipment greatly.
2, treatment system of the present invention is owing to used the material negative electrode beginning pole plate identical with the electrolysis precipitate, and therefore in electrolytic process, the electrolysis precipitate need not to shell the plate operation after being adsorbed onto on the negative electrode beginning pole plate, and automation degree of equipment obviously improves.
3, treatment process of the present invention is owing to added additive, and the heavy metal concentration of waste liquid after treatment is reduced to 0.5 grams per liter, even can minimum heavy metal concentration be reduced to the ppm level as required; The cathode efficiency of this treatment process can integral body remain on more than 80%, and corresponding power consumption cost will be effectively reduced.
Except top described purpose, feature and advantage, the present invention also has other purpose, feature and advantage.To do further detailed explanation to the present invention with reference to figure below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the industrial wastewater treatment system structural representation of the preferred embodiment of the present invention, and what electrolyzer was partly represented among the figure is vertical view.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Referring to Fig. 1, a kind of treatment system that contains heavy metal industrial effluent comprises: electrolyzer 1, circulation groove 5 and middle turn trough 6.One side of electrolyzer 1 is provided with treatment solution mixing section 4; Treatment solution mixing section 4 is communicated with electrolyzer 1; Between treatment solution mixing section 4 and electrolyzer 1, be provided with connecting pipe 41, this connecting pipe 41 is provided with valve, and pending solution is got in the electrolyzer 1 by connecting pipe 41.Be provided with stirrer 42 in the treatment solution mixing section 4, when in pending solution, being added with additive, open stirrer 42, make additive get into electrolyzer 1 thorough mixing before, and be evenly distributed at pending solution.Circulation groove 5 is communicated with treatment solution mixing section 4; Between circulation groove 5 and treatment solution mixing section 4, be provided with recycle pump 7, circulation groove 5 is that trade effluent is the reservoir of pending solution, according to the processing power of this treatment system; Disposable certain amount of industrial waste water is injected in the circulation groove 5; After adding additive, pending solution is drawn in the treatment solution mixing section 4, is re-introduced in the electrolyzer 1 through recycle pump 7.Preferably, this additive is a macromolecular organic compound.Electrolyzer 1 is communicated with middle turn trough 6 through pipeline 61, and the end that this pipeline 61 is connected with electrolyzer 1 is arranged on the upper end of electrolyzer 1, when the electrolytic solution in the electrolyzer 1 is excessive, after electrolytic solution overflows electrolyzer 1 from pipeline 61, flows in the middle turn trough 6.Middle turn trough 6 is communicated with circulation groove 5, between middle turn trough 6 and circulation groove 5, is provided with reflux pump 8, like this, behind the unlatching reflux pump 8, can in time the electrolytic solution in the turn trough in overflowing to 6 be extracted to circulation groove 5, realizes the cyclic electrolysis of pending solution.
A kind of treatment process that contains heavy metal industrial effluent provided by the invention; Use above-mentioned treatment system, concrete steps are: the first step is injected into a certain amount of pending solution in the circulation groove 5; Add an amount of additive; ON cycle pump 7, stirrer 42 and reflux pump 8 with pending liquid circular flow 10～20 minutes, are evenly distributed additive in pending liquid; Second step made electrolyzer 1 energising, and when the concentration of metal ions of electrolytic solution was greater than or equal to 2 grams per liters, the control cathode current density was at 400A/m
2When the concentration of metal ions of electrolytic solution less than 2 grams per liters and when being greater than or equal to 500ppm, the control cathode current density is at 350A/m
2When the concentration of metal ions of electrolytic solution during less than 500ppm, the control cathode current density is at 300A/m
2The 3rd step when the concentration of metal ions of electrolytic solution during less than 100ppm, finished electrolysis, took out negative plate 3, and the new negative plate 3 of packing into, used in order to next electrolysis.Preferably; The additive that adds in the first step is a macromolecular organic compound; This macromolecular organic compound is preferably gelatine, dried network is plain or thiocarbamide; Such macromolecular organic compound is the cathode surface active substance; Its mechanism of action in electrolytic process is to form one deck macromolecule membrane on the surface of negative plate 3, reaches and reduces the negative electrode concentration polarization and improve electrochemical cathode polar purpose, guarantees that cathode deposition can be separated out with densification, fine crystallization, bulk, high-purity form under the high cathode current density.Preferably, the monitoring of the concentration of metal ions of electrolytic solution is that whenever (Chinese of EDTA was: YD 30) electrolytic solution is carried out titrimetry at a distance from 1.5～2.5 hours use EDTA in second step.Preferably; The energising boot program of electrolyzer 1 is in second step: open electrolyte circulation system, exhaust treatment system, electric control cooling system successively; After definite said system runs well, open direct supply, electric effusion is carried out the recycling of metal electrodeposition according to the negative electrode useful area of equipment and the cathode current density feeding direct current of setting.Shutdown programm when preferably, finishing electrolysis in the 3rd step is: after the metal ion content in the electric effusion drops to the technique initialization value, close direct supply, electric control cooling system, the recycle system, exhaust treatment system successively.
As other embodiment; The span of the current density in the step of second in the treatment process of the present invention; Can be when satisfying corresponding metal ionic concn value; In following scope, choose arbitrarily: when the concentration of metal ions of electrolytic solution was greater than or equal to 2 grams per liters, cathode current density was controlled at 370A/m
2～450A/m
2When the concentration of metal ions of electrolytic solution less than 2 grams per liters and when being greater than or equal to 500ppm, cathode current density is controlled at 320A/m
2～370A/m
2When the concentration of metal ions of electrolytic solution during less than 500ppm, cathode current density is controlled at 270A/m
2～320A/m
2
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. treatment system that contains heavy metal industrial effluent; Comprise: electrolyzer (1); Said electrolyzer (1) comprises first cell wall (11) and second cell wall (12) that is oppositely arranged, and is staggeredly equipped with positive plate (2) and negative plate (3) in the said electrolyzer (1), it is characterized in that:
First end of said positive plate (2) is fixed on said first cell wall (11), and first end of said negative plate (3) is fixed on said second cell wall (12), and second end of each said negative plate (3) is positioned between adjacent two said positive plates (2);
Each said negative plate (3) is the beginning pole plate of tridimensional network.
2. the treatment system that contains heavy metal industrial effluent according to claim 1 is characterized in that,
Said positive plate (2) is the titanium anode plate of netted iridium tantalum coating structure.
3. the treatment system that contains heavy metal industrial effluent according to claim 2 is characterized in that,
Said treatment system also comprises treatment solution mixing section (4), and said treatment solution mixing section (4) is communicated with said electrolyzer (1) through the connecting pipe (41) of a band valve.
4. the treatment system that contains heavy metal industrial effluent according to claim 3 is characterized in that,
Be provided with stirrer (42) in the said treatment solution mixing section (4).
5. the treatment system that contains heavy metal industrial effluent according to claim 4 is characterized in that,
Said treatment system also comprises circulation groove (5) and middle turn trough (6), and said circulation groove (5) is communicated with said treatment solution mixing section (4), and said circulation groove (5) can inject pending liquid with controlling in said treatment solution mixing section (4);
Turn trough (6) is connected with the upper end of said electrolyzer (1) in said.
6. the treatment system that contains heavy metal industrial effluent according to claim 5 is characterized in that,
Between said circulation groove (5) and said treatment solution mixing section (4), be provided with recycle pump (7).
7. the treatment system that contains heavy metal industrial effluent according to claim 6 is characterized in that,
Turn trough (6) and said circulation groove (5) connection in said, and in said, be provided with reflux pump (8) between turn trough (6) and the said circulation groove (5).
8. a treatment process that contains heavy metal industrial effluent is used the described treatment system of claim 7, it is characterized in that concrete steps are:
The first step; A certain amount of pending liquid is injected in the said circulation groove (5); Add an amount of additive, open said recycle pump (7), said stirrer (42) and said reflux pump (8), additive is evenly distributed in pending liquid pending liquid circular flow 10～20 minutes;
Second step, give said electrolyzer (1) energising, when the concentration of metal ions of electrolytic solution was greater than or equal to 2 grams per liters, the control cathode current density was at 370A/m
2～450A/m
2When the concentration of metal ions of electrolytic solution less than 2 grams per liters and when being greater than or equal to 500ppm, the control cathode current density is at 320A/m
2～370A/m
2When the concentration of metal ions of electrolytic solution during less than 500ppm, the control cathode current density is at 270A/m
2～320A/m
2
The 3rd step when the concentration of metal ions of electrolytic solution during less than 100ppm, finished electrolysis, took out negative plate, and the new negative plate of packing into.
9. the treatment process that contains heavy metal industrial effluent according to claim 8 is characterized in that,
The said additive that adds in the said the first step is a macromolecular organic compound.
10. the treatment process that contains heavy metal industrial effluent according to claim 9 is characterized in that,
The monitoring of the concentration of metal ions of electrolytic solution is carried out through whenever using EDTA that electrolytic solution is carried out titrimetry at a distance from 1.5～2.5 hours in said second step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110331829 CN102424457B (en) | 2011-10-27 | 2011-10-27 | Treating system for industrial wastewater containing heavy metal and treating method thereof |
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| CN 201110331829 CN102424457B (en) | 2011-10-27 | 2011-10-27 | Treating system for industrial wastewater containing heavy metal and treating method thereof |
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| CN102424457A true CN102424457A (en) | 2012-04-25 |
| CN102424457B CN102424457B (en) | 2013-06-12 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104370345A (en) * | 2014-08-29 | 2015-02-25 | 冯胜 | Sewage treatment device |
| CN108101161A (en) * | 2017-12-18 | 2018-06-01 | 王珏 | A kind of heavy metal-polluted water treatment system |
| CN108277502A (en) * | 2017-01-06 | 2018-07-13 | 上海奇谋能源技术开发有限公司 | A method of being directly separated copper and tin alloy mixture using electrolysis |
| CN108558083A (en) * | 2018-05-07 | 2018-09-21 | 程佩芳 | A kind of heavy metal wastewater thereby integrated approach device |
| CN111912090A (en) * | 2020-08-21 | 2020-11-10 | 南京贝特空调设备有限公司 | Condensate recovery device and system thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6342151B1 (en) * | 1997-09-15 | 2002-01-29 | Heracus Electric-Nite International N.V. | Method of using a gas sensor |
| CN1714175A (en) * | 2002-08-26 | 2005-12-28 | Oro公司 | Structure of an electrode for use in an electrolytic cell |
| TW200600465A (en) * | 2004-06-17 | 2006-01-01 | Univ Nat Chiao Tung | Equipment for treating wastewater |
| CN201390683Y (en) * | 2009-04-17 | 2010-01-27 | 湖州森蓝环境工程有限公司 | Multistage electrolysis device for treating cyanide containing wastewater |
| CN102061484A (en) * | 2011-01-21 | 2011-05-18 | 仇文东 | Titanium anode plate with precious metal combination coating |
-
2011
- 2011-10-27 CN CN 201110331829 patent/CN102424457B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6342151B1 (en) * | 1997-09-15 | 2002-01-29 | Heracus Electric-Nite International N.V. | Method of using a gas sensor |
| CN1714175A (en) * | 2002-08-26 | 2005-12-28 | Oro公司 | Structure of an electrode for use in an electrolytic cell |
| TW200600465A (en) * | 2004-06-17 | 2006-01-01 | Univ Nat Chiao Tung | Equipment for treating wastewater |
| CN201390683Y (en) * | 2009-04-17 | 2010-01-27 | 湖州森蓝环境工程有限公司 | Multistage electrolysis device for treating cyanide containing wastewater |
| CN102061484A (en) * | 2011-01-21 | 2011-05-18 | 仇文东 | Titanium anode plate with precious metal combination coating |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104370345A (en) * | 2014-08-29 | 2015-02-25 | 冯胜 | Sewage treatment device |
| CN108277502A (en) * | 2017-01-06 | 2018-07-13 | 上海奇谋能源技术开发有限公司 | A method of being directly separated copper and tin alloy mixture using electrolysis |
| CN108101161A (en) * | 2017-12-18 | 2018-06-01 | 王珏 | A kind of heavy metal-polluted water treatment system |
| CN108101161B (en) * | 2017-12-18 | 2019-01-25 | 王珏 | A kind of heavy metal-polluted water treatment system |
| CN108558083A (en) * | 2018-05-07 | 2018-09-21 | 程佩芳 | A kind of heavy metal wastewater thereby integrated approach device |
| CN111912090A (en) * | 2020-08-21 | 2020-11-10 | 南京贝特空调设备有限公司 | Condensate recovery device and system thereof |
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| CN102424457B (en) | 2013-06-12 |
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