CN1166439C - Process for dusting and dsulfurizing fume - Google Patents
Process for dusting and dsulfurizing fume Download PDFInfo
- Publication number
- CN1166439C CN1166439C CNB001034987A CN00103498A CN1166439C CN 1166439 C CN1166439 C CN 1166439C CN B001034987 A CNB001034987 A CN B001034987A CN 00103498 A CN00103498 A CN 00103498A CN 1166439 C CN1166439 C CN 1166439C
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- agent
- flue gas
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- lime
- surfactant
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Abstract
The present invention discloses a dust removing and a desulphurizing method for flue gas, which belongs to the field of environmental protection. The method of the present invention comprises the following steps that (1), flue gas enters to an absorption tower to make a reaction with eliminating agent spray which contains caustic lye of soda, a collecting agent and a surface active agent; (2), milk of lime in right amount is added in the mixed liquid prepared by the reaction in the step (1); (3), the milk of lime is precipitated and filtered; (4), the clear liquid of the sodium hydroxide is recycled. The present invention has the advantages of small occupation area, high dust removal efficiency and no secondary pollution.
Description
The present invention relates to a kind of process for dusting and dsulfurizing fume, belong to field of environment protection.
SO
2Be main atmosphere pollution, once caused a lot of serious air pollution episodes in some countries.Be control SO
2Atmosphere pollution, people have carried out many research work aspect heavy oil desulfurization, and have obtained progress, but these technology do not cost dearly, and are exactly technical also full maturity not, large-scale application to also have many difficulties; Compare, flue gas desulfurization makes fast progress.What use morely at present is the alkali metal method, it is that flue gas and lime liquor are reacted with desulfurization, but it is because of using a large amount of fat limes, so the fixation means investment is big, floor space is big, the lime handling capacity is big, and is on-the-spot messy, easily causes secondary pollutions such as lime dust, in addition, often to the efficiency of dust collection reduction of dust in the flue gas, also caused pollution control not up to standard after the desulfurization, not thorough.The object of the present invention is to provide that a kind of floor space is little, dust removal efficiency is high, the process for dusting and dsulfurizing fume of non-secondary pollution.
The object of the present invention is achieved like this:
A kind of process for dusting and dsulfurizing fume, this method is
(1) flue gas is entered the absorption tower and have an effect, wherein remove collecting agent, and surfactant that agent contains caustic lye of soda, is selected from " any mixing of one or more in waterglass, potassium silicate, the polyphosphate sodium " with removing agent spraying;
(2) in (1) reacted mixed liquor, add an amount of lime slurry;
(3) precipitation, filtration;
(4) the NaOH clear liquid is recycled.
Described surfactant is one or more any mixing in sodium alkyl benzene sulfonate, Nekal BX, peregal 0-20, the bleeding agent.
Described collecting agent, surfactant and the weight ratio that removes water in the agent are 1: 1-2: 10000～1: 1-3: 1000.
Below the present invention is described in detail: (1) remove NaOH in the agent content and add lime slurry amount all with flue gas in SO
2Concentration is relevant, can decide according to the measurement result to flue gas when specifically using.(2) use NaOH as desulfurizing agent, its handling capacity is little, makes that factory's fixation means investment is little, and floor space is few, and non-secondary pollution.(3) this method generates NaOH clear liquid and calcium sulfate precipitation at last, and the NaOH clear liquid can be recycled, and has reduced cost and workload, and calcium sulfate can be made gypsum and use.(4) adopting collecting agent, surfactant dedusting, is to utilize increases such as waterglass, bleeding agent to remove the viscosity and the activity of agent solution, and ion surface has static, thereby dust in flue gas is adsorbed to fall, and has reduced secondary pollution.
The present invention has following advantage than prior art: (1) is because the NaOH that uses is Powdered, and reproducible utilization, thus to fixation means require low, floor space is little; (2) the collecting agent dust removal efficiency height of choosing can reach more than 95%, almost non-secondary pollution.
Introduce two embodiment of the present invention below:
Embodiment one:
With NaOH 27%, water 69.5%, sodium metasilicate 2%, Nekal BX 1.5% composition mixture; Again above solution being joined to make in 90% the water and remove agent, regenerates with milk of lime in PH after the desulfurization＞8.Desulfurization degree almost reaches 100%, and dust removal efficiency reaches 97%.
Embodiment two:
With NaOH 26%, water 70%, potassium silicate 2%, sodium alkyl benzene sulfonate 1%, bleeding agent 1% composition mixture; Above solution being joined in 90% the water, regenerates with milk of lime in PH after the desulfurization＞8 again.Desulfurization degree almost reaches 100%, and dust removal efficiency reaches 97.5%.
Claims (3)
1, a kind of process for dusting and dsulfurizing fume is characterized in that: this method is
(1) flue gas is entered the absorption tower and have an effect, remove wherein that agent contains caustic lye of soda, is selected from waterglass, one or more collecting agent, and the surfactant of any mixing in the potassium silicate, polyphosphate sodium with removing agent spraying;
(2) in (1) reacted mixed liquor, add an amount of lime slurry;
(3) precipitation, filtration;
(4) the NaOH clear liquid is recycled.
2, method according to claim 1 is characterized in that described surfactant is one or more any mixing in sodium alkyl benzene sulfonate, Nekal BX, peregal 0-20, the bleeding agent.
3, method according to claim 1 and 2, the weight ratio that it is characterized in that collecting agent, surfactant and remove water in the agent is 1: 1-2: 10000～1: 1-3: 1000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001034987A CN1166439C (en) | 2000-03-15 | 2000-03-15 | Process for dusting and dsulfurizing fume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001034987A CN1166439C (en) | 2000-03-15 | 2000-03-15 | Process for dusting and dsulfurizing fume |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1273876A CN1273876A (en) | 2000-11-22 |
| CN1166439C true CN1166439C (en) | 2004-09-15 |
Family
ID=4577031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001034987A Expired - Fee Related CN1166439C (en) | 2000-03-15 | 2000-03-15 | Process for dusting and dsulfurizing fume |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1166439C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI0915774B1 (en) * | 2008-07-15 | 2019-11-05 | 3 Nine Ab | method for capturing positively or negatively charged airborne pathogens |
| CN101844028B (en) * | 2010-03-02 | 2012-11-28 | 江苏工业学院 | Composite flue gas desulfurization agent and preparation method thereof |
| CN104492203A (en) * | 2014-12-04 | 2015-04-08 | 常州大学 | Gas-liquid-phase medium flue gas dust removal method |
| CN104941577A (en) * | 2015-04-22 | 2015-09-30 | 芜湖市鸿坤汽车零部件有限公司 | Banana peel modified active carbon kieselguhr particles for desulphurization and dust removal and preparation method for banana peel modified active carbon kieselguhr particles |
| CN104923001B (en) * | 2015-06-05 | 2016-08-17 | 北京中晶环境科技股份有限公司 | Dedusting composition, desulfurization compositions and purposes |
-
2000
- 2000-03-15 CN CNB001034987A patent/CN1166439C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1273876A (en) | 2000-11-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040915 Termination date: 20150315 |
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| EXPY | Termination of patent right or utility model |