CN103007733A - Method for processing sulphur dioxide exhaust gas generated in industry of roasting and electrolyzing manganese dioxide - Google Patents
Method for processing sulphur dioxide exhaust gas generated in industry of roasting and electrolyzing manganese dioxide Download PDFInfo
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- CN103007733A CN103007733A CN2012105185109A CN201210518510A CN103007733A CN 103007733 A CN103007733 A CN 103007733A CN 2012105185109 A CN2012105185109 A CN 2012105185109A CN 201210518510 A CN201210518510 A CN 201210518510A CN 103007733 A CN103007733 A CN 103007733A
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Abstract
The invention discloses a method for processing sulphur dioxide exhaust gas generated in an industry of roasting and electrolyzing manganese dioxide. The method comprises the steps of firstly, preparing MnO sizing agent of which the concentration is 50-150g/L, putting in a plate tower or a bubbling bed, introducing smoke containing SO2 exhaust gas generated by a calcinator into the plate tower or the bubbling bed to carry out contact reaction, introducing into an oxidation bed with an online ORP (oxidation-reduction potential) meter when the pH of the sizing agent achieves 4.0-5.5; and introducing in air or oxygen to oxidize desulfurization products MnSO3 and Mn(HSO3)2, indicating that the MnSO3 and Mn(HSO3)2 are completely oxidized into sulfate when the ORP potential displayed by the online ORP meter achieves 300mv, stopping introducing in the air or the oxygen to obtain MnSO4 solution, and directly discharging the solution to a combining production workshop to reuse. The method is high in desulphurization efficiency, has small possibility of forming scales on the device, is simple and convenient to operate; a desulfurizer, SO2 and the desulfurization products can be recycled, and secondary pollution is not generated.
Description
Technical field
The present invention relates to a kind of form waste gas of sulfur dioxide processing method, especially relate to a kind of form waste gas of sulfur dioxide processing method that roasting electrolytic manganese dioxide industry is produced.
Background technology
At present, the form waste gas of sulfur dioxide of roasting electrolytic manganese dioxide industry generation both at home and abroad adopts lime, lime masonry desulfurizing agent to carry out wet-treating mostly, the shortcoming of its existence is: the easy fouling of equipment, troublesome poeration, desulfurizing agent and sulfur dioxide fail to recycle, gained desulfurization product calcium sulfite or calcium sulfate are dropped mostly, often cause secondary pollution.
Industrial, also the material absorbing sulfur dioxide such as useful sodium carbonate, magnesia, ammonia are also recycled, but because the absorbent cost is high, complex process, byproduct is at a discount, thereby affects the economic benefit of enterprise, can't apply.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of equipment less scaling, easy and simple to handle, desulfurizing agent, SO
2Can both recycle with desulfurization product, not produce secondary pollution, small investment, the form waste gas of sulfur dioxide processing method to the generation of roasting electrolytic manganese dioxide industry that operating cost is low.
The technical scheme that the present invention solves its technical problem employing is: the method that a kind of form waste gas of sulfur dioxide that roasting electrolytic manganese dioxide industry is produced is processed, may further comprise the steps: the powder that contains MnO that produces with MnO powder or roaster first adds water and makes the MnO slurry, the concentration of described MnO slurry is 50-150g/L, the MnO slurry is placed plate column or bubbling bed, with the SO that contains of roaster generation
2In the flue gas introducing plate column or the MnO slurry in the bubbling bed of waste gas, make the SO in MnO slurry and the flue gas
2Carry out haptoreaction, generate MnSO
3And Mn (HSO
3)
2, when containing MnSO
3And Mn (HSO
3)
2The pH of slurry when reaching 4.0-5.5, import in the oxidation bed that is provided with online ORP meter, pass into air or oxygen to desulfurization product MnSO
3And Mn (HSO
3)
2Carry out oxidation, in oxidation bed, when the ORP current potential of online ORP meter demonstration reaches 300mv, show MnSO
3And Mn (HSO
3)
2Be oxidized to sulfate fully, stop to pass into air or oxygen, get MnSO
4Solution directly drains into the reuse of chemical combination workshop with this solution.
The present invention use contain MnO slurry in plate column or bubble tower with flue gas in SO
2Reaction is with the SO in the flue gas
2Mainly removed with manganous sulfite solution form, gained manganous sulfite solution gets manganese sulfate solution through oxidation, can directly be back to electrolytic manganese dioxide chemical combination workshop or electrolytic manganese chemical combination workshop is used as raw material, also can purify by evaporative crystallization technique, get manganese sulfate product.
The desulphurization reaction formula is:
A small amount of MnO is arranged in slurry
2The time, except (1), (2), also have (3) formula to occur:
Along with the carrying out of (1), (2) and (3) reaction, MnO and MnO in the slurry
2Substantially exhaust MnSO
3Concentration raises, and pH value and desulfuration efficiency descend, and when the pH of slurry value is 4.0-5.5, stop sulfur dioxide absorption waste gas, and the gained slurry is carried out oxidation with air or oxygen to desulfurization product in oxidation bed:
Compared with prior art, the present invention is the reclaiming type wet type desulfurizing, has the following advantages: desulfuration efficiency is high, and equipment is less scaling, and is easy and simple to handle, small investment, and operating cost is low, and desulfurization product is carried out oxidation processes, so that desulfurizing agent, SO
2Can both recycle with desulfurization product, not produce secondary pollution.
The present invention is applicable to the flue-gas desulfurizing engineering that the pyrolusite roasting technique produces manganous oxide, especially electrolytic manganese dioxide smelting enterprise flue gas desulfurization.
The specific embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1
Present embodiment may further comprise the steps: add water with the MnO powder first and make the MnO slurry, the MnO concentration of slurry is 80g/L, and the MnO slurry is placed plate column, with the SO that contains of roaster generation
2The flue gas of waste gas is introduced in the interior MnO slurry of plate column, makes the SO in MnO slurry and the flue gas
2Carry out haptoreaction, generate MnSO
3And Mn (HSO
3)
2, when containing MnSO
3And Mn (HSO
3)
2The pH of slurry reach at 5.0 o'clock, import in the oxidation bed that is provided with online ORP meter, pass into air to desulfurization product MnSO
3And Mn (HSO
3)
2Carry out oxidation, in oxidation bed, when the ORP current potential of online ORP meter demonstration reaches 300mv, show MnSO
3And Mn (HSO
3)
2Be oxidized to sulfate fully, stop to pass into air, get MnSO
4Solution directly drains into the reuse of chemical combination workshop with this solution.
Embodiment 2
Present embodiment may further comprise the steps: the powder that contains MnO that produces with roaster first adds water and makes the MnO slurry, and the MnO concentration of slurry is 100g/L, and the MnO slurry is placed bubbling bed, with the SO that contains of roaster generation
2The flue gas of waste gas is introduced in the interior MnO slurry of bubbling bed, makes the SO in MnO slurry and the flue gas
2Carry out haptoreaction, generate MnSO
3And Mn (HSO
3)
2, when containing MnSO
3And Mn (HSO
3)
2The pH of slurry reach at 4.5 o'clock, import in the oxidation bed that is provided with online ORP meter, pass into oxygen to desulfurization product MnSO
3And Mn (HSO
3)
2Carry out oxidation, in oxidation bed, when the ORP current potential of online ORP meter demonstration reaches 300mv, show MnSO
3And Mn (HSO
3)
2Be oxidized to sulfate fully, stop to pass into oxygen, get MnSO
4Solution directly drains into the reuse of chemical combination workshop with this solution.
Claims (1)
1. method that the form waste gas of sulfur dioxide that roasting electrolytic manganese dioxide industry is produced is processed, may further comprise the steps: the powder that contains MnO that produces with MnO powder or roaster first adds water and makes the MnO slurry, the concentration of described MnO slurry is 50-150g/L, the MnO slurry is placed plate column or bubbling bed, with the SO that contains of roaster generation
2In the flue gas introducing plate column or the MnO slurry in the bubbling bed of waste gas, make the SO in MnO slurry and the flue gas
2Carry out haptoreaction, generate MnSO
3And Mn (HSO
3)
2, when containing MnSO
3And Mn (HSO
3)
2The pH of slurry when reaching 4.0-5.5, import in the oxidation bed that is provided with online ORP meter, pass into air or oxygen to desulfurization product MnSO
3And Mn (HSO
3)
2Carry out oxidation, in oxidation bed, when the ORP current potential of online ORP meter demonstration reaches 300mv, show MnSO
3And Mn (HSO
3)
2Be oxidized to sulfate fully, stop to pass into air or oxygen, get MnSO
4Solution directly drains into the reuse of chemical combination workshop with this solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210518510.9A CN103007733B (en) | 2012-12-06 | 2012-12-06 | Method for processing sulphur dioxide exhaust gas generated in industry of roasting and electrolyzing manganese dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210518510.9A CN103007733B (en) | 2012-12-06 | 2012-12-06 | Method for processing sulphur dioxide exhaust gas generated in industry of roasting and electrolyzing manganese dioxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103007733A true CN103007733A (en) | 2013-04-03 |
| CN103007733B CN103007733B (en) | 2015-02-04 |
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ID=47957170
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210518510.9A Active CN103007733B (en) | 2012-12-06 | 2012-12-06 | Method for processing sulphur dioxide exhaust gas generated in industry of roasting and electrolyzing manganese dioxide |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438339A (en) * | 2019-08-26 | 2019-11-12 | 金川集团股份有限公司 | The removal methods of manganese in a kind of hydroxide nickel cobalt lysate |
| CN110484727A (en) * | 2019-09-19 | 2019-11-22 | 中国恩菲工程技术有限公司 | The minimizing technology of manganese ion and its application in hydrometallurgy zinc metallurgy field |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102258937A (en) * | 2011-06-19 | 2011-11-30 | 昆明冶金研究院 | Method for producing manganese sulfate by cyclically utilizing low-concentration sulfur dioxide smoke in aluminum electrolysis cell |
-
2012
- 2012-12-06 CN CN201210518510.9A patent/CN103007733B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102258937A (en) * | 2011-06-19 | 2011-11-30 | 昆明冶金研究院 | Method for producing manganese sulfate by cyclically utilizing low-concentration sulfur dioxide smoke in aluminum electrolysis cell |
Non-Patent Citations (1)
| Title |
|---|
| 朱二刚，苏任军，孙维义，曾令强: "软锰矿浆烟气同步脱硫脱硝尾液氧化除铁的研究", 《环境工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438339A (en) * | 2019-08-26 | 2019-11-12 | 金川集团股份有限公司 | The removal methods of manganese in a kind of hydroxide nickel cobalt lysate |
| CN110484727A (en) * | 2019-09-19 | 2019-11-22 | 中国恩菲工程技术有限公司 | The minimizing technology of manganese ion and its application in hydrometallurgy zinc metallurgy field |
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| Publication number | Publication date |
|---|---|
| CN103007733B (en) | 2015-02-04 |
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