CN102925919A - On-line addition device for three-dimensional electrode electrochemical oxidation ferrate solution - Google Patents
On-line addition device for three-dimensional electrode electrochemical oxidation ferrate solution Download PDFInfo
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- CN102925919A CN102925919A CN2012104825540A CN201210482554A CN102925919A CN 102925919 A CN102925919 A CN 102925919A CN 2012104825540 A CN2012104825540 A CN 2012104825540A CN 201210482554 A CN201210482554 A CN 201210482554A CN 102925919 A CN102925919 A CN 102925919A
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Abstract
An on-line addition device for a three-dimensional electrode electrochemical oxidation ferrate solution relates to an on-line electrolysis addition device for preparing ferrate, aims to solve the problems that the time is long when the ferrate solution is prepared by a current electrolytic method, and the obtained ferrate solution is not stable. The on-line addition device comprises a cathode chamber, anode chambers, submerged agitators, an electrolytic tank casing, valves, cathode plates, anode plates and cation exchange membranes, and adopts the structure that the cathode chamber is clamped between two anode chambers, wherein the space volume of the cathode chamber is less than that of each anode chamber, the intervals between the cation exchange membranes and the cathode plates are controlled, the plurality layers of the anode plates are arrayed at intervals, the cation exchange membranes are inserted into two sides of the cathode plates, the cathode plates are iron plates, and the anode plates are three-dimensional foam iron plates. The high-concentration ferrate solution is obtained by adding a NaOH electrolyte solution and electrolyzing for 2 h, and can be kept effective under the condition of electrolysis. The on-line addition device is mainly applicable to sludge reduction and sludge conditioning.
Description
Technical field
The present invention relates to the On-line electrolytic dissolution throwing device of ferrate solution.
Background technology
Mud is the byproduct of sewage treatment process, has entered since the Eleventh Five-Year Plan, and the sewage disposal industry of China has obtained fast development, and sewage treatment capacity and processing rate increase rapidly, have brought a large amount of excess sludges.Show according to firmly building section's data, by the end of the end of the year in 2009, national town sewage treatment capacity reached 280 billion cubic meters, and wet mud (water ratio 80%) generation is broken through 2,000 ten thousand tons.Investigation result shows, the mud that wastewater treatment in China factory produces has 80% not dealt carefully with, mud arbitrarily stack and the pollution that causes with pollution problem is more and more serious again, and caused social concern.Ferrate can effectively be realized the molten born of the same parents of mud as a kind of sludge conditioner, and microbial cell and extracellular polymeric in the oxidation classification active sludge are realized mud decrement, are a kind of effective sludge conditioners.
Ferrate refers to the sexavalence molysite, it is unique a kind of stable high price iron cpd, its effective constituent is the ferric acid radical ion, the ferric acid radical ion has the positive tetrahedron structure, the Fe atom is positioned at tetrahedral center, four Sauerstoffatoms are positioned at four drift angles, all have very strong oxidisability in whole PH scope.Ferrate can discharge a large amount of atomic oxygens in process soluble in water, thereby effectively kills germ and virus in the water, and self can also be reduced into the Fe(OH of nascent state)
3, this is a kind of colory inorganic flocculating agent, can be efficiently except the fine suspended substance in anhydrating.
The preparation method of existing ferrate mainly contains 3 kinds, i.e. hypochlorite oxidation method, high-temperature fusion oxidation style and electrolytic process.
Hypochlorite oxidation method: the method is take hypochlorite and molysite as raw material, synthesized high iron hydrochlorate, but the method needs poisonous chlorine in the process of preparation, and the ferric acid radical ion that generates is easy to be subjected to impurity effect and decomposes.
The high-temperature fusion oxidation style: select alkali-metal nitrate, oxide compound or oxyhydroxide under the condition of High Temperature High Pressure, to generate ferrate with the molysite melting, relatively harsher but this method requires reaction conditions, easily to blast, energy-output ratio is large.
Electrolytic process: by containing iron anode when the concentrated alkali solution electrolysis, anodic oxidation synthesized high iron hydrochlorate.Electrolytic process is easy and simple to handle, raw material conveniently be easy to get and consumption less and obtain broad development, but because the existence of anode side reaction makes current efficiency low, preparation feedback was for up to 6 hours, decomposition rate was accelerated when ferrate concentration raise, and caused the unstable preservation of highly purified ferrate solution difficult.
Summary of the invention
The objective of the invention is that to prepare the ferrate solution preparation time long in order to solve existing electrolytic process, the unstable problem of preserving difficulty of the ferrate solution that obtains, and the online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution is provided.
The online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution of the present invention comprises cathode compartment, the anolyte compartment, agitator under the liquid, the electrolyzer shell, valve, negative plate, positive plate and cationic exchange membrane, the online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution adopts the structure of a cathode compartment of two anolyte compartment's therebetween, the spatial volume of cathode compartment is less than the space of anolyte compartment, and agitator under the liquid is set in anolyte compartment bottom, cathode compartment surrounds square by two negative plates, the anolyte compartment surrounds square by positive plate and electrolyzer shell, positive plate is that Spaced is arranged, insert cationic exchange membrane two spaced negative plate both sides, so that cathode compartment and anolyte compartment are separated;
Wherein the material of negative plate is common iron plate, thickness is 1～2mm, the material of positive plate is three-dimensional foam iron plate, the spacing of cationic exchange membrane and negative plate is 1.6～2.2mm, the spacing of negative plate and positive plate is 4.5～8mm, the spacing of two spaced negative plates is 45～60mm, and the thickness of three-dimensional foam iron plate is 0.5～1mm;
The number of plies of the positive plate that Spaced is arranged in the Sole anode chamber is 1～6 floor, and when the number of plies of positive plate is more than 1 layer during three-dimensional foam iron plate, positive plate distance between layers is 3～6mm.
The online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution of the present invention has adopted the structure of a cathode compartment of two anolyte compartment's folders, and the spatial volume of cathode compartment is less than the space of anolyte compartment, improved the output of ferrate, in order to reduce concentration polarization, in the anolyte compartment, add whipping device, reduce simultaneously the loss of catholyte by the spacing that shortens negative plate and ion-exchange membrane.Reduce resistance by the distance that shortens between the negative and positive two-plate, improve current efficiency.Utilizing the concentration of the ferrate solution that the online throwing device electrolysis of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution of the present invention obtained in 2 hours to reach 15mg/L(remembers with Fe), current efficiency reaches 58%, improved the concentration of ferrate solution, shortened the preparation time of ferrate solution, and can keep ferrate solution under the condition of electrolysis, not lose efficacy, the ferrate solution satisfactory stability that has shown the online throwing device acquisition that utilizes Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution of the present invention has realized that sludge treatment adds the needs of the used ferrate of conditioning online.The online throwing device of ferrate solution of the present invention is developed for sludge disposal, mainly to realize mud decrement and to improve dewatering performance of sludge reaching the effective disposal of mud as target, is applied to mud decrement and sludge conditioning.
Description of drawings
Fig. 1 is the diagrammatic cross-section of the online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution among the embodiment, 1-cathode compartment, 2-anolyte compartment, agitator under the 3-liquid, 4-electrolyzer shell, 5-valve;
Fig. 2 is the schematic top plan view of the online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution among the embodiment, agitator under the 3-liquid, and the 6-negative plate, the 7-positive plate, 8-cationic exchange membrane, a represent the spacing of negative plate and positive plate.
Embodiment
Embodiment one: be described further below in conjunction with accompanying drawing 1 and 2 pairs of embodiments of accompanying drawing:
The online throwing device of present embodiment Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution comprises cathode compartment 1, anolyte compartment 2, agitator 3 under the liquid, electrolyzer shell 4, valve 5, negative plate 6, positive plate 7 and cationic exchange membrane 8, the online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution adopts the structure of a cathode compartment 1 of two anolyte compartment's 2 therebetween, the spatial volume of cathode compartment 1 is less than the space of anolyte compartment 2, and in 2 bottoms, anolyte compartment agitator 3 under the liquid is set, cathode compartment 1 surrounds square by two negative plates 6, anolyte compartment 2 surrounds square by positive plate 7 and electrolyzer shell 4, positive plate 7 is arranged for Spaced, insert cationic exchange membrane 8 two spaced negative plate 6 both sides, so that cathode compartment 1 is separated with anolyte compartment 2;
Wherein the material of negative plate 6 is common iron plate, thickness is 1～2mm, the material of positive plate 7 is three-dimensional foam iron plate, cationic exchange membrane 8 is 1.6～2.2mm with the spacing of negative plate 6, negative plate 6 is 4.5～8mm with the spacing of positive plate 7, the spacing of two spaced negative plates 6 is 45～60mm, and the thickness of three-dimensional foam iron plate is 0.5～1mm;
The number of plies of the positive plate 7 that Spaced is arranged in the Sole anode chamber is 1～6 floor, and when the number of plies of positive plate 7 is more than 1 layer during three-dimensional foam iron plate, positive plate 7 distance between layers is 3～6mm;
Present embodiment is controlled the input and output of electrolytic solution by valve 5.
Utilize the online throwing device of present embodiment Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution to prepare the method for ferrate solution: the NaOH solution of getting 15～20mol/L adds in the electrolyzer as electrolytic solution, by wire negative plate is linked to each other with power cathode, by wire positive plate is linked to each other with positive source, open agitator under the liquid, the control agitator speed is 160～200r/min, open direct supply, the current density of holding anode is 35mA/cm
2～40mA/cm
2, voltage of supply is 1.5～2.5V, electrolyte temperature is 20～30 ℃, obtains ferrate solution in 1.5～2.5 hours by the electrolysis of following electrode reaction equation.
Wherein the electrode reaction equation is as follows in the electrolytic process:
Anode: Fe+8OH
-→ FeO
4 2-+ 4H
2O+6e
Negative electrode: 2H
2O+2e → H
2+ OH
-
Total reaction: Fe+2OH
-+ 2H
2O → FeO
4 2-+ 2H
2
The online throwing device of present embodiment Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution has adopted the structure of a cathode compartment of two anolyte compartment's folders, two anolyte compartments are symmetrically distributed in spaced negative plate both sides, and the spatial volume of cathode compartment has improved the output of ferrate less than the space of anolyte compartment.Reduce simultaneously the loss of catholyte by the spacing that shortens negative plate and ion-exchange membrane, reduce resistance by the distance that shortens between the negative and positive two-plate, improve current efficiency.
Embodiment two: present embodiment and embodiment one are different be cationic exchange membrane 8 with the spacing of negative plate 6 is 1.8～2.1mm.Other device and parameter are identical with embodiment one.
Embodiment three: present embodiment is different from embodiment one or two be positive plate 7 to the distance of electrolyzer shell 4 is 180～230mm.Other device and parameter are identical with embodiment one or two.
Embodiment four: present embodiment is different from one of embodiment one to three is that the number of plies of the positive plate 7 that Spaced is arranged in the Sole anode chamber is 1～6 floor, when positive plate 7 numbers of plies are more than 1 layer during three-dimensional foam iron plate, positive plate 7 distance between layers is 4～5mm.Other device and parameter are identical with one of embodiment one to three.
Embodiment:
The online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution comprises cathode compartment 1 in the present embodiment, anolyte compartment 2, agitator 3 under the liquid, electrolyzer shell 4, valve 5, negative plate 6, positive plate 7 and cationic exchange membrane 8, the online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution adopts the structure of a cathode compartment 1 of two anolyte compartment's 2 therebetween, the spatial volume of Sole anode chamber 2 is 200 * 400 * 750(mm) (wide * length * height), the spatial volume of cathode compartment 1 is 50 * 400 * 750(mm) (wide * length * height), and in 2 bottoms, anolyte compartment agitator 3 under the liquid is set, cathode compartment 1 surrounds square by two negative plates 6, anolyte compartment 2 surrounds square by positive plate 7 and electrolyzer shell 4, positive plate 7 is arranged for Spaced, insert the thick perfluorinated sulfonic acid ionic membrane 8 of 0.5mm two spaced negative plate 6 both sides, so that cathode compartment 1 is separated with anolyte compartment 2;
Wherein the material of negative plate 6 is the thick common iron plate of 1mm, the material of positive plate is the thick three-dimensional foam iron plate of 1mm, cationic exchange membrane 8 is 2mm with the spacing of negative plate 6, negative plate 6 is 5mm with the spacing a of positive plate 7, the spacing of two negative plates 6 is 50mm, and positive plate 7 is 200mm to the distance of electrolyzer shell 4;
The number of plies of the positive plate 7 that Spaced is arranged in the Sole anode chamber is 5 floor, and positive plate 7 distance between layers is 4mm.
Fig. 1 is the diagrammatic cross-section of the online throwing device of the present embodiment Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution;
Fig. 2 is the schematic top plan view of the online throwing device of the present embodiment Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution.
The preparation of the present embodiment Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution: the NaOH solution of getting 16mol/L adds in the electrolyzer as electrolytic solution, by wire negative plate is linked to each other with power cathode, by wire positive plate is linked to each other with positive source, open agitator under the liquid, the control agitator speed is 180r/min, open direct supply, the current density of holding anode is 40mA/cm
2, voltage of supply is 2V, and electrolyte temperature is 25 ℃, and electrolysis obtained ferrate solution in 2 hours.
The concentration that the present embodiment electrolysis obtained ferrate solution in 2 hours reaches 15mg/L(and remembers with Fe), current efficiency reaches 58%, keep simultaneously ferrate solution under the condition of electrolysis, not lose efficacy, embody the ferrate solution satisfactory stability of the online throwing device acquisition that utilizes Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution of the present invention, realized that sludge treatment adds the needs of the used ferrate of conditioning online.Utilize ferrate that the online throwing device of ferrate solution of the present invention obtains and mud in mass ratio 1(remember with Fe): 100 add, and the water ratio of mud is reduced to below 70%.
Claims (4)
1. the online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution, the online throwing device that it is characterized in that Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution comprises cathode compartment (1), anolyte compartment (2), agitator under the liquid (3), electrolyzer shell (4), valve (5), negative plate (6), positive plate (7) and cationic exchange membrane (8), the online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution adopts the structure of two anolyte compartments (2) cathode compartments of therebetween (1), the spatial volume of cathode compartment (1) is less than the space of anolyte compartment (2), and in anolyte compartment (2) bottom agitator under the liquid (3) is set, cathode compartment (1) surrounds square by two negative plates (6), anolyte compartment (2) surrounds square by positive plate (7) and electrolyzer shell (4), positive plate (7) is arranged for Spaced, insert cationic exchange membrane (8) in two spaced negative plates (6) both sides, so that cathode compartment (1) is separated with anolyte compartment (2);
Wherein the material of negative plate (6) is common iron plate, thickness is 1～2mm, the material of positive plate (7) is three-dimensional foam iron plate, cationic exchange membrane (8) is 1.6～2.2mm with the spacing of negative plate (6), negative plate (6) is 4.5～8mm with the spacing of positive plate (7), the spacing of two spaced negative plates (6) is 45～60mm, and the thickness of three-dimensional foam iron plate is 0.5～1mm;
The number of plies of the positive plate (7) that Spaced is arranged in the Sole anode chamber is 1～6 floor, and when the number of plies of positive plate (7) is more than 1 layer during three-dimensional foam iron plate, positive plate (7) distance between layers is 3～6mm.
2. the online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution according to claim 1 is characterized in that cationic exchange membrane (8) and the spacing of negative plate (6) are 1.8～2.1mm.
3. the online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution according to claim 1 and 2 is characterized in that positive plate (7) is 180～230mm to the distance of electrolyzer shell (4).
4. the online throwing device of Using Electrochemical Reactor with Three-dimensional Electrode oxidation ferrate solution according to claim 1, it is characterized in that positive plate (7) number of plies that Spaced is arranged in the Sole anode chamber is 1～6 floor, when the number of plies of positive plate (7) is more than 1 layer during three-dimensional foam iron plate, positive plate (7) distance between layers is 4～5mm.
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|---|---|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106082413A (en) * | 2016-08-02 | 2016-11-09 | 黎明职业大学 | A kind of ferrate synthesizes and organic matter degradation equipment and technique online |
| RU169435U1 (en) * | 2016-07-04 | 2017-03-17 | федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский политехнический университет Петра Великого" (ФГАОУ ВО "СПбПУ") | Installation for the complex production of chlorine-containing reagents and sodium ferrate |
| CN107986517A (en) * | 2017-11-17 | 2018-05-04 | 浙江海洋大学 | The processing method of resistant gene in a kind of marine culture wastewater |
| CN109761413A (en) * | 2019-01-24 | 2019-05-17 | 上海锦泰新能源环保有限公司 | A kind of fecal sewage treatment equipment |
| CN109809552A (en) * | 2019-01-24 | 2019-05-28 | 上海锦泰新能源环保有限公司 | A kind of preparation method of oxidant containing fecal sewage treatment |
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| CN101634035A (en) * | 2009-09-03 | 2010-01-27 | 西安交通大学 | Electrochemical method and electrochemical device for synergistically generating ozone and hydrogen peroxide in neutral medium |
| CN102211801A (en) * | 2010-04-01 | 2011-10-12 | 上海晶园环保科技有限公司 | Electrochemical reaction device and method for treating high-concentration organic wastewater |
| CN102295330A (en) * | 2011-09-14 | 2011-12-28 | 北京大学深圳研究生院 | Method for synchronous treatment of waste liquid and waste acid of heavy metal |
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| US4975171A (en) * | 1988-05-11 | 1990-12-04 | Permelec Electrode Ltd. | Bipolar electrolytic cell |
| CN1900365A (en) * | 2006-06-27 | 2007-01-24 | 福建师范大学 | Method for preparing ferrate by electric generating method and its special electrolytic bath |
| CN101634035A (en) * | 2009-09-03 | 2010-01-27 | 西安交通大学 | Electrochemical method and electrochemical device for synergistically generating ozone and hydrogen peroxide in neutral medium |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU169435U1 (en) * | 2016-07-04 | 2017-03-17 | федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский политехнический университет Петра Великого" (ФГАОУ ВО "СПбПУ") | Installation for the complex production of chlorine-containing reagents and sodium ferrate |
| CN106082413A (en) * | 2016-08-02 | 2016-11-09 | 黎明职业大学 | A kind of ferrate synthesizes and organic matter degradation equipment and technique online |
| CN107986517A (en) * | 2017-11-17 | 2018-05-04 | 浙江海洋大学 | The processing method of resistant gene in a kind of marine culture wastewater |
| CN107986517B (en) * | 2017-11-17 | 2021-01-15 | 浙江海洋大学 | Treatment method of resistance gene in mariculture wastewater |
| CN109761413A (en) * | 2019-01-24 | 2019-05-17 | 上海锦泰新能源环保有限公司 | A kind of fecal sewage treatment equipment |
| CN109809552A (en) * | 2019-01-24 | 2019-05-28 | 上海锦泰新能源环保有限公司 | A kind of preparation method of oxidant containing fecal sewage treatment |
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Application publication date: 20130213 |