CN102266712A - Method for inhibiting generation of dioxins - Google Patents
Method for inhibiting generation of dioxins Download PDFInfo
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- CN102266712A CN102266712A CN2010101173353A CN201010117335A CN102266712A CN 102266712 A CN102266712 A CN 102266712A CN 2010101173353 A CN2010101173353 A CN 2010101173353A CN 201010117335 A CN201010117335 A CN 201010117335A CN 102266712 A CN102266712 A CN 102266712A
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- dioxin
- magnesia
- generation
- magnesium oxide
- dioxins
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- Treating Waste Gases (AREA)
Abstract
The invention relates to a method for inhibiting generation of dioxin pollutants. According to the invention, magnesium oxide is used as a substance for inhibiting dioxin synthesizing reactions; magnesium oxide is crushed and dried, such that the particle size of magnesium oxide is smaller than 1 millimeter; magnesium oxide is placed in a reaction apparatus, and is subject to a reaction with dioxin precursors such as polychlorophenol and polychloriznated benzene under a temperature greater than 200 DEG C; dioxin precursors are degraded, and dioxin precursors are inhibited from being synthesized into dioxins, such that the generation of dioxins is controlled. The apparatus can be a waste incinerator or a reaction vessel.
Description
Technical field
The present invention relates to a kind of magnesia and pollute application aspect the control, relate in particular to a kind of magnesia in the incinerator of waste incinerator and the application of the outer tail gas cooling device of stove, the reactor inner control dioxin generation that can heat at dioxin.
Background technology
Dioxin body in previous existence generates dioxin in thermal process be one of important production process of incineration of waste process Zhong dioxin, inhibition to this process is to control one of the important channel of dioxin generation (list of references: 1, Zheng Ming brightness; Liu's Peng rock, Bao Zhicheng, Xu Xiaobai, the generation of bioxin and Study on degradation progress, Science Bulletin, 1999,44,455.2、Mechanism?of?the?Formationof?Polychlorinated?Dibenzo-dioxins?and?Dibenzofurans?from?Chlorophenolsin?Gas?Phase?Reactions.Chemosphere，Vol，38，No3，pp.529-549，1999)。
Summary of the invention
The object of the present invention is to provide a kind of magnesia that utilizes to suppress the method that dioxin generates, control can effectively the incineration of waste dioxin being generated.
For achieving the above object, the method that inhibition dioxin provided by the invention generates, with dioxin body in previous existence with heat reaction, the dioxin body in previous existence of degrading, the generation of inhibition dioxin after magnesia mixes.
Described dioxin body in previous existence is multi-chlorophenol and polystream.
Described heating-up temperature is more than 200 degrees centigrade.
The described thermal response that adds is to carry out in the tail gas cooling device in the incinerator of the reactor that can heat, waste incinerator or outside the stove.
The specific embodiment
The present invention utilizes magnesia as the generation of degradation agent with inhibition dioxin pollutant, and dioxin bodies in previous existence such as multi-chlorophenol and polystream are mixed with magnesia, adds thermal response, and degraded dioxin body in previous existence suppresses the synthetic of dioxin.Can have an effect with dioxin bodies in previous existence such as multi-chlorophenol and polystream when magnesia is heated to more than 200 degrees centigrade, degraded dioxin body in previous existence suppresses body He Cheng dioxin in previous existence.
By test example and the embodiment that narrates below, can further understanding be arranged to the present invention.
Test example: pentachlorophenol is as the body in a kind of important previous existence of dioxin, and 300 degree heating pentachlorophenol down can generate dioxin, and add after the magnesia, the pentachlorophenol residual quantity He the dioxin growing amount all obviously reduce.Data see Table 1.
Show 1:300 degree centigrade of magnesian retardance situation down
| Project | Reaction back pentachlorophenol residual quantity (mg) | The pentachlorophenol degradation rate | Dioxin growing amount (ng) |
| 1.0mg pentachlorophenol 300 degree add thermal response 5min | 0.61mg | 39％ | 215ng |
| 1.0mg pentachlorophenol and 15.0mg magnesia 300 degree add thermal response 5min | 0.16mg | 84％ | 16.1ng |
| The magnesia action effect | 26.2％ | ? | 7.5％ |
Not adding magnesia with the 1.0mg pentachlorophenol reacts in contrast, adding the reaction of 15.0mg magnesia with the 1.0mg pentachlorophenol compares, the residual quantity of pentachlorophenol is by the 0.16mg that does not add after magnesian 0.61mg reduces to adding magnesia, and residual quantity only is 26.2% of a control reaction behind the adding magnesia; The pentachlorophenol degradation rate brings up to 84% by 39%; And the hypertoxic accessory substance dioxin that generates is reduced to by the 215ng of control reaction and is added magnesian 16.1ng, and adding magnesia Hou dioxin growing amount only is 7.5% of control reaction.Therefore can think that magnesian adding all has good effect for degraded that promotes pentachlorophenol and the generation of retardance dioxin.
Embodiment:
At the incinerator smoke treatment facility reactor is installed partly, magnesia is added in the reactor.Flue gas process cyclone separator from incinerator; remove the bulky grain dust in the flue gas; enter heat exchanger; flue-gas temperature is reduced to about 500 degrees centigrade; spray into magnesium oxide powder by screw(-type) feeder afterwards; De dioxin body in previous existence and magnesia effect in the flue gas, the generation of blocking dioxin.And after flue gas that peromag is handled is by sack cleaner, discharge, the flue gas that gives off can reach the national standard of incinerator smoke dioxin discharging.
Need to prove that flue gas treatment facility of the present invention and reactor all can utilize known equipment to carry out, the embodiment that the present invention provides has promptly adopted known fume treatment auxiliary and reactor to carry out.
From above-mentioned test example and embodiment as can be seen, utilize magnesia can reduce the growing amount of dioxin, but above-mentioned test example and embodiment just are used for help understanding essentiality content of the present invention, are not to be used for limiting the present invention.According to technology contents of the present invention, can be in the incinerator of waste incinerator and the outer tail gas cooling device of stove, the reactor inner control dioxin generation that can heat.
Claims (5)
1. one kind is suppressed the method that dioxin generates, with dioxin body in previous existence with heat reaction, the dioxin body in previous existence of degrading, the generation of inhibition dioxin after magnesia mixes.
2. the method for claim 1, wherein described dioxin body in previous existence is multi-chlorophenol and polystream.
3. the method for claim 1, wherein described magnesian particle diameter is less than 1 millimeter.
4. the method for claim 1, wherein described heating-up temperature is more than 200 degrees centigrade.
5. the method for claim 1, wherein described thermal response that adds is to carry out in reactor that can heat or waste incinerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101173353A CN102266712A (en) | 2010-03-01 | 2010-03-01 | Method for inhibiting generation of dioxins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101173353A CN102266712A (en) | 2010-03-01 | 2010-03-01 | Method for inhibiting generation of dioxins |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102266712A true CN102266712A (en) | 2011-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101173353A Pending CN102266712A (en) | 2010-03-01 | 2010-03-01 | Method for inhibiting generation of dioxins |
Country Status (1)
| Country | Link |
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| CN (1) | CN102266712A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330969A (en) * | 2000-05-31 | 2002-01-16 | 三浦工业株式会社 | Decomposition treatment process for dioxine |
| CN1403404A (en) * | 2001-09-07 | 2003-03-19 | 营口成龙实业有限公司 | Making process of chrome-magnesite spinel |
| CN101357290A (en) * | 2008-09-25 | 2009-02-04 | 浙江大学 | Method and system of controlling dioxin discharge in flue gas by duty-cycle operation of sulphur-containing inhibitor |
-
2010
- 2010-03-01 CN CN2010101173353A patent/CN102266712A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330969A (en) * | 2000-05-31 | 2002-01-16 | 三浦工业株式会社 | Decomposition treatment process for dioxine |
| CN1403404A (en) * | 2001-09-07 | 2003-03-19 | 营口成龙实业有限公司 | Making process of chrome-magnesite spinel |
| CN101357290A (en) * | 2008-09-25 | 2009-02-04 | 浙江大学 | Method and system of controlling dioxin discharge in flue gas by duty-cycle operation of sulphur-containing inhibitor |
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Application publication date: 20111207 |