CN101912723A - Method for processing sulfur dioxide smelting fumes - Google Patents
Method for processing sulfur dioxide smelting fumes Download PDFInfo
- Publication number
- CN101912723A CN101912723A CN 201010241676 CN201010241676A CN101912723A CN 101912723 A CN101912723 A CN 101912723A CN 201010241676 CN201010241676 CN 201010241676 CN 201010241676 A CN201010241676 A CN 201010241676A CN 101912723 A CN101912723 A CN 101912723A
- Authority
- CN
- China
- Prior art keywords
- absorption tower
- tail gas
- absorption
- gas absorber
- alkali lye
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000003723 Smelting Methods 0.000 title claims abstract description 24
- 239000003517 fume Substances 0.000 title claims abstract description 10
- 238000010521 absorption reaction Methods 0.000 claims abstract description 124
- 239000007789 gas Substances 0.000 claims abstract description 77
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 238000007599 discharging Methods 0.000 claims abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 111
- 239000006096 absorbing agent Substances 0.000 claims description 61
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 50
- 239000003513 alkali Substances 0.000 claims description 40
- 239000003546 flue gas Substances 0.000 claims description 22
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 21
- 239000007921 spray Substances 0.000 claims description 12
- 241000282326 Felis catus Species 0.000 claims description 10
- 239000000779 smoke Substances 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- 239000011593 sulfur Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000003518 caustics Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The invention discloses a method for processing sulfur dioxide smelting fumes, relating to a process of continuously absorbing low concentration sulfur dioxide smelting fumes. The method is characterized in that devices arranged during the processing include an absorption tower, a tail gas absorption tower, a caustic mixing tank, a balance pipe and a circulating pump arranged between the absorption tower and the tail gas absorption tower, circulating pumps, a PH interlock control valve, and a level control interlock valve; the balance pipe arranged between the absorption tower and the tail gas absorption tower is provided with a slope, which is convenient for lye to flow from the tail gas absorption tower to the absorption tower, and the absorption tower and the tail gas absorption tower are respectively provided with one circulating pump for continuously delivering absorption liquids; a PH meter is arranged into a circulating pipeline of the absorption tower and interlocked with an automatic discharge valve of the absorption tower; and a level meter is fixed on an absorption and circulation tank and interlocked with an automatic feed valve of the tail gas absorption tower. The method has higher automation, reduces the time for complicated feeding and discharging during the absorption, greatly increases the operation speed of absorption, and lightens the labor intensity.
Description
Technical field
A kind of method for processing sulfur dioxide smelting fumes relates to the continuous absorption process of a kind of low-concentration sulfur dioxide flue gas during smelting.
Background technology
In the smelting process of sulphide ore, usually can produce and contain SO in a large number
2Flue gas during smelting, surrounding enviroment are caused serious pollution because country is more and more stricter to environmental protection requirement, also just higher to smelting system environmental protection requirement.At present, SO in the flue gas during smelting
2The improvement main method be that wherein sulfur dioxide is used to produce sulfuric acid, but the SO that different smelting bodies of heater is produced
2The concentration difference of flue gas, SO in flue gas
2Concentration cross low and when being not suitable for the system acid system the general mode that adopts alkali lye to absorb handle.Traditional alkali lye absorption process is: the sig water that the liquid caustic soda of high concentration is mixed with the low concentration that is fit to absorption, the sig water for preparing is added the absorption circulating slot, be evacuated to top, absorption tower through pump, descend through the shower nozzle spray, realize the absorption of alkali lye sulfur dioxide in the flue gas during smelting with the flue gas during smelting counter current contacting.Absorption liquid always in tower circulation absorb, when absorption reaches terminal point (PH=5～6), need stop to absorb, saturated absorption liquid is discharged, prepare the alkali lye absorption that circulates again then again.Therefore, traditional alkali lye is absorbed as intermittent operation, can not realize serialization, saturated absorption liquid discharge process complicated operation, labour intensity is big, and productivity ratio is also lower, and can't absorb in the discharge process, sulfur dioxide flue gas directly enters in the air, and is big for environment pollution.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, a kind of automaticity height, absorption efficiency height, simple to operate are provided, save the operating time, alleviate worker's labour intensity, reduce the low-concentration sulfur dioxide flue gas during smelting processing method of environmental pollution.
The objective of the invention is to realize in the following manner.
A kind of method for processing sulfur dioxide smelting fumes, the equipment that it is characterized in that the setting of its processing procedure comprises the balance pipe between absorption tower, tail gas absorber, alkali-prepared tank, absorption tower and tail gas absorber, circulating pump, circulating pump, the chain control valve of pH, liquid level control interlocking valve; Balance pipe between absorption tower and the tail gas absorber has the gradient, is convenient to alkali lye and flows into the absorption tower from tail gas absorber, and each disposes a circulating pump respectively absorption tower and tail gas absorber, carries out the continuous conveying of absorption liquid; A PH meter is set on the circulating line on absorption tower interlocks with the discharging automatic valve on absorption tower; Absorbing the charging automatic valve interlocking that a liquid level gauge and tail gas absorber are set on the circulating slot.
A kind of method for processing sulfur dioxide smelting fumes of the present invention, the processing step that it is characterized in that its processing procedure comprises: the alkali-prepared tank preparation alkali lye that liquid caustic soda is delivered to high-order configuration with pump, by go into the circulating slot of tail gas absorber from baric flow, seal in the circulating slot on absorption tower again through balance pipe, start absorption tower circulating pump and tail gas absorber circulating pump simultaneously, alkali lye is delivered to the spray equipment of cat head, alkali lye descends from the spray equipment spray, with from bottom to top low-concentration sulfur dioxide flue gas during smelting counter current contacting from tower, the NaOH in the alkali lye absorbs sulfur in smoke; Flue gas absorbs the back and carries out secondary absorption, tail gas qualified discharge then from entering tail gas absorber again after the gas vent of cat head comes out through the absorption tower; Absorption liquid reaches pH value and absorbs and to be delivered to the absorption liquid storage tank after qualified; During ordinary production, alkali lye absorbs sulfur dioxide through tail gas absorber earlier, and then seals in the absorption tower; When absorption reaches terminal point, open the discharging valve on absorption tower by the control of PH meter, after absorbing tower liquid-level reduces, open the tail gas absorber inlet valve by the liquid level gauge control on absorption tower and in the circulating slot of tail gas absorber, add the new alkali lye of preparing, after the tail gas absorber liquid level rises, alkali lye in the tail gas absorber will seal in the absorption tower by balance pipe, realizes input and output material amount balance at last, reaches the purpose of continuous absorption.
Method automaticity of the present invention is higher, reduced the charging complicated in the absorption process and the time of discharging, greatly accelerated the absorption service speed, alleviated labour intensity.
Description of drawings:
Fig. 1 is an apparatus and process schematic flow sheet of the present invention.
The specific embodiment:
A kind of method for processing sulfur dioxide smelting fumes, the equipment of its processing procedure comprises: the balance pipe 4 between absorption tower 1, tail gas absorber 2, alkali-prepared tank 3, absorption tower and tail gas absorber, circulating pump 5, circulating pump 6, the chain control valve 7 of pH, liquid level control interlocking valve 8 are formed.Balance pipe between absorption tower and the tail gas absorber has certain gradient, so that alkali lye flows into the absorption tower from tail gas absorber, each disposes a circulating pump 5 and 6 respectively absorption tower and tail gas absorber, carries out the continuous conveying of absorption liquid; A PH meter 9 is set on the circulating line on absorption tower interlocks with the discharging automatic valve 7 on absorption tower; Absorbing charging automatic valve 8 interlockings that a liquid level gauge 10 and tail gas absorber are set on the circulating slot.
Material flow is: be 30% liquid caustic soda is delivered to high-order configuration with pump alkali-prepared tank 3 with concentration, adding water, to be mixed with concentration be about 10% sig water, by go into the circulating slot of tail gas absorber 2 from baric flow, when reaching certain liquid level, seal in the circulating slot on absorption tower 1 again through balance pipe 4, start absorption tower circulating pump 5 and tail gas absorber circulating pump 6 simultaneously, alkali lye is delivered to the spray equipment of cat head, alkali lye descends from the spray equipment spray, with from bottom to top low-concentration sulfur dioxide flue gas during smelting counter current contacting from tower, the NaOH in the alkali lye absorbs sulfur in smoke; Flue gas absorbs the back and carries out secondary absorption, tail gas qualified discharge then from entering tail gas absorber 2 again after the gas vent of cat head comes out through absorption tower 1.Absorption liquid reaches certain pH value and promptly absorbs and be delivered to the absorption liquid storage tank after qualified.During ordinary production, because flue gas concentration is lower in the tail gas absorber, the alkali lye of higher concentration is beneficial to smoke absorption, so whole absorption process is set to flue gas and alkali lye counter current contacting technology, promptly absorb through 2 pairs of sulfur dioxide of tail gas absorber earlier, and then seal in absorption tower 1, therefore the alkali concn that enters in the absorption tower 1 is lower, and flue gas concentration is higher in the absorption tower 1, so it is qualified to be easier to absorb, when absorption reaches terminal point, open the discharging valve 7 on absorption tower by 9 controls of PH meter, load acquires a certain degree when the absorption tower, and absorbing tower liquid-level will reduce, open tail gas absorber inlet valve 8 by liquid level gauge 10 controls on absorption tower then and in the circulating slot of tail gas absorber 2, add the new alkali lye of preparing, after the tail gas absorber liquid level rose, because two tower liquid level imbalances, the alkali lye in the tail gas absorber will seal in absorption tower 1 by balance pipe, realize input and output material amount balance at last, reach the purpose of continuous absorption.Automaticity of the present invention is higher, has reduced the charging complicated in the absorption process and the time of discharging, has greatly accelerated the absorption service speed, has alleviated labour intensity.
Method of the present invention is provided with an alkali-prepared tank, an absorption tower and a tail gas absorber, and a balance pipe is set between absorption tower and tail gas absorber.On the discharge pipe on the feed pipe of tail gas absorber and absorption tower, an automatic valve is set respectively, a PH meter is set on the circulating line on absorption tower interlocks, absorbing the charging automatic valve interlocking that a liquid level gauge and tail gas absorber are set on the circulating slot with the discharging automatic valve on absorption tower.During ordinary production, the sig water that only needs to prepare in advance deposits alkali-prepared tank in, determines that then the balance liquid level that absorbs the pH value of terminal point and absorb circulating slot gets final product.
Embodiment 1
Be that 31.5% liquid caustic soda is delivered to alkali-prepared tank 3 with pump with concentration, adding water, to be mixed with concentration be 12.3% sig water, go into tail gas absorber 2 from baric flow, seal in absorption tower 1 through balance pipe 4 again, when reaching 4m, the liquid level of absorption tower 1 and tail gas absorber 2 starts absorption tower circulating pump 5 and tail gas absorber circulating pump 6, alkali lye is delivered to the spray equipment of cat head, the contact of alkali lye flue gas adverse current, the NaOH in the alkali lye absorbs sulfur in smoke; When the absorption liquid pH value reaches 5.5 in the absorption tower 1, open by PH meter 9 control automatic valves 7, absorption liquid is delivered to the absorption liquid storage tank; The liquid level on absorption tower 1 is reduced to 3.5m, is opened by liquid level gauge 10 control automatic valves 8, adds 12.3% alkali lye of new preparation to tail gas absorber 2, tail gas absorber 2 liquid levels reach 4.5m, because liquid level difference, alkali lye flows into absorption tower 1 by balance pipe 4 in the tail gas absorber 2, and it is identical to reach two tower liquid levels; SO
2The flue gas during smelting of concentration 3% absorbs the back and carries out secondary absorption, tail gas SO from entering tail gas absorber 2 again after the gas vent of cat head comes out through absorption tower 1
2Content is 840ppm, qualified discharge.
Embodiment 2
Be that 32% liquid caustic soda is delivered to alkali-prepared tank 3 with pump with concentration, adding water, to be mixed with concentration be 11.8% sig water, go into tail gas absorber 2 from baric flow, seal in absorption tower 1 through balance pipe 4 again, when reaching 3.8m, the liquid level of absorption tower 1 and tail gas absorber 2 starts absorption tower circulating pump 5 and tail gas absorber circulating pump 6, alkali lye is delivered to the spray equipment of cat head, and alkali lye contacts with flue gas adverse current, and the NaOH in the alkali lye absorbs sulfur in smoke; When the absorption liquid pH value reaches 5.8 in the absorption tower 1, open by PH meter 9 control automatic valves 7, absorption liquid is delivered to the absorption liquid storage tank; The liquid level on absorption tower 1 is reduced to 3.3m, is opened by liquid level gauge 10 control automatic valves 8, adds 11.8% alkali lye of new preparation to tail gas absorber 2, tail gas absorber 2 liquid levels reach 4.3m, because liquid level difference, alkali lye flows into absorption tower 1 by balance pipe 4 in the tail gas absorber 2, and it is identical to reach two tower liquid levels; SO
2The flue gas during smelting of concentration 2.5% absorbs the back and carries out secondary absorption, tail gas SO from entering tail gas absorber 2 again after the gas vent of cat head comes out through absorption tower 1
2Content is 830ppm, qualified discharge.
Claims (2)
1. method for processing sulfur dioxide smelting fumes, the equipment that it is characterized in that the setting of its processing procedure comprises the balance pipe between absorption tower, tail gas absorber, alkali-prepared tank, absorption tower and tail gas absorber, circulating pump, circulating pump, the chain control valve of pH, liquid level control interlocking valve; Balance pipe between absorption tower and the tail gas absorber has the gradient, is convenient to alkali lye and flows into the absorption tower from tail gas absorber, and each disposes a circulating pump respectively absorption tower and tail gas absorber, carries out the continuous conveying of absorption liquid; A PH meter is set on the circulating line on absorption tower interlocks with the discharging automatic valve on absorption tower; Absorbing the charging automatic valve interlocking that a liquid level gauge and tail gas absorber are set on the circulating slot.
2. a kind of method for processing sulfur dioxide smelting fumes according to claim 1, the processing step that it is characterized in that its processing procedure comprises: liquid caustic soda is delivered to alkali-prepared tank preparation alkali lye with pump, by go into the circulating slot of tail gas absorber from baric flow, seal in the circulating slot on absorption tower again through balance pipe, start absorption tower circulating pump and tail gas absorber circulating pump simultaneously, alkali lye is delivered to the spray equipment of cat head, alkali lye descends from the spray equipment spray, with from bottom to top low-concentration sulfur dioxide flue gas during smelting counter current contacting from tower, the NaOH in the alkali lye absorbs sulfur in smoke; Flue gas absorbs the back and carries out secondary absorption, tail gas qualified discharge then from entering tail gas absorber again after the gas vent of cat head comes out through the absorption tower; Absorption liquid reaches pH value and absorbs and to be delivered to the absorption liquid storage tank after qualified; During ordinary production, alkali lye absorbs sulfur dioxide through tail gas absorber earlier, and then seals in the absorption tower; When absorption reaches terminal point, open the discharging valve on absorption tower by the control of PH meter, after absorbing tower liquid-level reduces, open the tail gas absorber inlet valve by the liquid level gauge control on absorption tower and in the circulating slot of tail gas absorber, add the new alkali lye of preparing, after the tail gas absorber liquid level rises, alkali lye in the tail gas absorber will seal in the absorption tower by balance pipe, realizes input and output material amount balance at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102416761A CN101912723B (en) | 2010-07-30 | 2010-07-30 | Method for processing sulfur dioxide smelting fumes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102416761A CN101912723B (en) | 2010-07-30 | 2010-07-30 | Method for processing sulfur dioxide smelting fumes |
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| Publication Number | Publication Date |
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| CN101912723A true CN101912723A (en) | 2010-12-15 |
| CN101912723B CN101912723B (en) | 2012-04-25 |
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| CN2010102416761A Active CN101912723B (en) | 2010-07-30 | 2010-07-30 | Method for processing sulfur dioxide smelting fumes |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341284A (en) * | 2013-06-30 | 2013-10-09 | 金川集团股份有限公司 | Denitration system and method for SO2 flue gas sodium citrate absorption liquid |
| CN103551020A (en) * | 2013-10-28 | 2014-02-05 | 济南卡博唐生物科技有限公司 | System for absorbing HCL gas in tail gas |
| CN103736378A (en) * | 2013-12-20 | 2014-04-23 | 金川集团股份有限公司 | Chlorine-containing waste gas absorption system |
| CN104474849A (en) * | 2014-12-04 | 2015-04-01 | 中国钢研科技集团有限公司 | Acid regeneration acid gas absorption and exhaust emission reduction system and utilization method thereof |
| CN105268305A (en) * | 2015-11-23 | 2016-01-27 | 金川集团股份有限公司 | Device and method for multistage cyclic absorption and desulfurization of active ore pulp |
| CN105349772A (en) * | 2015-11-23 | 2016-02-24 | 金川集团股份有限公司 | Device and method for reducing magnesium oxide content for concentrate desulfurization |
| CN106178860A (en) * | 2016-08-29 | 2016-12-07 | 金川集团股份有限公司 | One utilizes continuous circulating liquid to absorb super low concentration SO2the device and method of flue gas |
| CN112657300A (en) * | 2019-10-15 | 2021-04-16 | 中石化南京化工研究院有限公司 | Sulfuric acid tail gas treatment process |
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2010
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Patent Citations (4)
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| JP2001347133A (en) * | 2000-06-09 | 2001-12-18 | Ishikawajima Harima Heavy Ind Co Ltd | Wet process flue gas desulfurizing equipment |
| CN101468289A (en) * | 2007-12-24 | 2009-07-01 | 同方环境股份有限公司 | Desulfurizer suitable for sulfuric dioxide of large-scope change and control method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341284A (en) * | 2013-06-30 | 2013-10-09 | 金川集团股份有限公司 | Denitration system and method for SO2 flue gas sodium citrate absorption liquid |
| CN103341284B (en) * | 2013-06-30 | 2015-06-17 | 金川集团股份有限公司 | Denitration system and method for SO2 flue gas sodium citrate absorption liquid |
| CN103551020A (en) * | 2013-10-28 | 2014-02-05 | 济南卡博唐生物科技有限公司 | System for absorbing HCL gas in tail gas |
| CN103736378A (en) * | 2013-12-20 | 2014-04-23 | 金川集团股份有限公司 | Chlorine-containing waste gas absorption system |
| CN103736378B (en) * | 2013-12-20 | 2015-12-02 | 金川集团股份有限公司 | A kind of chlorine contained exhaust gas absorption system |
| CN104474849A (en) * | 2014-12-04 | 2015-04-01 | 中国钢研科技集团有限公司 | Acid regeneration acid gas absorption and exhaust emission reduction system and utilization method thereof |
| CN105268305A (en) * | 2015-11-23 | 2016-01-27 | 金川集团股份有限公司 | Device and method for multistage cyclic absorption and desulfurization of active ore pulp |
| CN105349772A (en) * | 2015-11-23 | 2016-02-24 | 金川集团股份有限公司 | Device and method for reducing magnesium oxide content for concentrate desulfurization |
| CN105349772B (en) * | 2015-11-23 | 2018-04-10 | 金川集团股份有限公司 | A kind of concentrate desulfurization reduces the device and method of content of magnesia |
| CN106178860A (en) * | 2016-08-29 | 2016-12-07 | 金川集团股份有限公司 | One utilizes continuous circulating liquid to absorb super low concentration SO2the device and method of flue gas |
| CN112657300A (en) * | 2019-10-15 | 2021-04-16 | 中石化南京化工研究院有限公司 | Sulfuric acid tail gas treatment process |
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| CN101912723B (en) | 2012-04-25 |
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