CN1246597A - Process for treating dioxin in waste gas generated by burning garbage - Google Patents
Process for treating dioxin in waste gas generated by burning garbage Download PDFInfo
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- CN1246597A CN1246597A CN 99114997 CN99114997A CN1246597A CN 1246597 A CN1246597 A CN 1246597A CN 99114997 CN99114997 CN 99114997 CN 99114997 A CN99114997 A CN 99114997A CN 1246597 A CN1246597 A CN 1246597A
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- activated carbon
- carbon powder
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Abstract
A process for treating dioxin in waste gas generated by burning garbage includes such steps as spraying activated carbon powder to the fume generated by burning garbage, separating the activated carbon powder that has adsorbed dioxin in it from fume, and burning the activated carbon powder. It features that before treated, the fume must pass through wet duster to remove powder dust, so when the activated carbon powder burns, the catalyst generated by burning dioxin is not additionally increased and the comsumption of activated carbon powder can be effectively controlled.
Description
The present invention relates to a kind of waste gas processing method, the process for treating dioxin in especially a kind of waste gas generated by burning garbage.
The processing of rubbish is common in the burning mode.Contain hydrocarbons, organic chloride and copper class heavy metal etc. in the rubbish.In the waste incineration process, when temperature reached 280～450, hydro carbons thing and organic chloride generated dioxin through chemical reaction; When temperature surpassed 980 ℃, dioxin decomposed fully; When temperature was reduced to 470 ℃, dioxin was synthetic in a large number again.In the reaction of formation of above-mentioned dioxin, contained copper class material (copper ion in metallic copper and cupric oxide, the copper chloride) has then played the effect of catalyst in the rubbish.The English name of dioxin is Dioxins, is abbreviated as DXN, and it has the mankind sends out carcinous, urges deformity and immunotoxicity etc., is the extremely strong harmful substance of a kind of toxicity, therefore must thoroughly administer.Be willing to introduce in the flat 9-45368 patent application a kind of waste gas processing method of waste incineration facility in the method, allow rubbish burn the spy of Japan, burn the waste gas that the back produces and enter auxiliary combustion chamber, enter flue by auxiliary combustion chamber again at main chamber.In being discharged into the process of flue, allow waste gas by the cooling of cooling device and residual heat using device earlier, in waste gas, spray into limewash and activated carbon powder again, promptly utilize in the limewash and waste gas in acidic materials, utilize the dioxin in the activated carbon powder absorption waste gas.At last, the activated carbon powder that will be adsorbed with dioxin with dry collector is separated from waste gas.Isolated activated carbon powder is sent the auxiliary combustion chamber burning back to, and treated waste gas then discharges.Though said method has certain effect to the excessive emissions that prevents dioxin, it still exists defective.This is because when spraying into activated carbon in waste gas, still contain the dust of copper class material in the waste gas.In the process that the activated carbon that utilizes dry collector will be adsorbed with dioxin is separated from waste gas, the dust of above-mentioned copper class material also together is separated, and is sent back to the combustion chamber with the activated carbon that is adsorbed with dioxin and burn.And this copper class material can be facilitated the generation of dioxin once more in the combustion chamber, produces more substantial dioxin, and moves in circles thus and constantly increase the concentration of the copper class material in the combustion chamber, constitutes a kind of vicious circle.Therefore, said method still awaits improving.
Purpose of the present invention promptly is that said method is improved, and a kind of better process for treating dioxin is provided.
The present invention improves above-mentioned existing method according to the mechanism of production of dioxin.In the present invention, increase for fear of increase the quantum of output that causes dioxin because of the catalyst in the combustion chamber, before spraying into the activated carbon powder in the flue gas that produces to waste incineration, allow flue gas in wet scrubber, be subjected to the cleaning of current earlier especially, thereby remove dust in flue gas.After dust in flue gas is fallen in the water diffluence, in the flue gas that incineration firing produces, spray into the activated carbon powder again.At last, the activated carbon powder that is adsorbed with dioxin is separated from flue gas, and isolated activated carbon powder is sent into combustion chambers burn.With regard to method of the present invention, because the dust of copper class material also can be removed in the current cleaning process in the flue gas, do not burned and can not send back to the combustion chamber with the activated carbon powder that is adsorbed with dioxin again, therefore the concentration of copper class material can not increase in the combustion chamber, that is the catalyst that generates dioxin can not increase, the quantum of output of dioxin also can not increase, and has correspondingly constituted benign cycle.In addition, in the method for the invention, consider that flue gas is subjected to current cleaning temperature afterwards and may reduces to lower in wet scrubber, and lower flue-gas temperature can reduce the adsorption effect of activated carbon to dioxin, therefore suggestion is before spraying into the activated carbon powder in flue gas, utilize heater earlier flue gas to be warming up to 145～165 ℃, to improve the utilization rate of activated carbon.Test shows that in the time of in flue-gas temperature is heated to the said temperature scope, the adsorption capacity of activated carbon can be brought up to more than 90% by 70%.Simultaneously, the present invention advises the isolated activated carbon powder that is adsorbed with dioxin is sent into the main chamber burning of burning away the refuse.This be because, in above-mentioned burning process, can produce corrosive gas, and combustion chamber temperature is high more, this gas is strong more to combustion chamber inner tubal wall corrosion of metal.Auxiliary combustion chamber is generally used for producing superheated steam, its indoor temperature far above the main chamber temperature (generally speaking, main chamber tube wall metal temperature is not higher than 350 ℃, auxiliary combustion chamber tube wall metal temperature then is higher than 550 ℃), therefore above-mentioned activated carbon powder should not be sent into the auxiliary combustion chamber burning.In the present invention, the wet scrubber that is used to clean flue gas can be existing spray type dust separator or water curtain style deduster etc., but is good to adopt the water curtain style deduster especially, as existing venturi formula deduster.When need heat the flue gas after cleaning, can directly adopt the waste heat of front end flue gas to carry out, can also adopt the conventional electric heating device.When the activated carbon powder that is adsorbed with dioxin is separated, can be used in formula or wet scrubber from flue gas, but comparatively simple to be used in the formula deduster especially, as existing sack cleaner.
Process for treating dioxin of the present invention is compared with aforementioned existing method, owing to when flue gas is cleaned, the dust that contains catalyst is removed, when the activated carbon that is adsorbed with dioxin is sent back to combustion chambers burn, dioxin in the combustion chamber generates catalyst not to be increased, then dioxin does not have increment, thereby constituted benign cycle, corresponding effective use amount of having controlled activated carbon preferably.
Content of the present invention further illustrates with the following Examples, but content of the present invention is not limited only to content related among the embodiment.
Fig. 1 is the flow chart of processing method among the embodiment.
As shown in Figure 1, after rubbish entered main chamber 2 burnings by rubbish bunker 1, the flue gas of generation entered smoke processing system through auxiliary combustion chamber 3.Processing procedure in the present embodiment is as follows: allow flue gas be subjected to the cleaning of current earlier in wet scrubber 4 and remove the dust that contains copper class material, utilize heater 10 that flue gas is warming up to about 155 ℃ again, be beneficial to the absorption of activated carbon.After this, in flue gas, spray into the activated carbon powder, allow dioxin in the activated carbon powder absorption flue gas by activated carbon spraying device 5.At last, the activated carbon powder that will be adsorbed with dioxin with deduster 6 separates from flue gas, and utilizes compressed air through carrier pipe 7 isolated activated carbon powder to be sent into main chamber 2 internal combustion (compressed air is by compressed air inlet 9 inputs).Flue gas is after treatment discharged by chimney 8.In the present embodiment, flue gas being imposed the wet scrubber that is adopted when current clean is water curtain style deduster (venturi deduster).The deduster that adopts when the activated carbon powder that is adsorbed with dioxin is separated from flue gas is dry collector (sack cleaner).
Claims (5)
1, the process for treating dioxin in a kind of waste gas generated by burning garbage, comprise following processing procedure: in the flue gas that waste incineration produces, spray into the activated carbon powder, the activated carbon powder that will be adsorbed with dioxin again separates from flue gas, and isolated activated carbon powder sent into combustion chambers burn, it is characterized in that: before in flue gas, spraying into the activated carbon powder, allow flue gas in wet scrubber, be subjected to the cleaning of current earlier and remove dust.
2, processing method as claimed in claim 1 is characterized in that allowing flue gas be subjected to spraying into before the activated carbon powder after the current cleaning in wet scrubber, utilizes heater that flue gas is warming up to 145～165 ℃ earlier.
3, processing method as claimed in claim 2 is characterized in that isolated activated carbon powder is sent into the main chamber burning of burning away the refuse.
4,, it is characterized in that the wet scrubber that is adopted is the water curtain style deduster as claim 1 or 2 or 3 described processing methods.
5, processing method as claimed in claim 4 is characterized in that the activated carbon powder that adopts dry collector will be adsorbed with dioxin separates from flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99114997 CN1120955C (en) | 1999-07-09 | 1999-07-09 | Process for treating dioxin in waste gas generated by burning garbage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99114997 CN1120955C (en) | 1999-07-09 | 1999-07-09 | Process for treating dioxin in waste gas generated by burning garbage |
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| Publication Number | Publication Date |
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| CN1246597A true CN1246597A (en) | 2000-03-08 |
| CN1120955C CN1120955C (en) | 2003-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 99114997 Expired - Fee Related CN1120955C (en) | 1999-07-09 | 1999-07-09 | Process for treating dioxin in waste gas generated by burning garbage |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101747145A (en) * | 2009-12-20 | 2010-06-23 | 周开根 | End purification system for gasifying and liquefying domestic garbage and organic waste |
| CN1968745B (en) * | 2004-06-15 | 2011-05-18 | 佳能株式会社 | Structure designed for adsorption of DNA intercalators |
| CN105605586A (en) * | 2015-11-29 | 2016-05-25 | 集美大学 | Waste incineration treatment system with high-temperature dust remover |
| CN105605587A (en) * | 2015-11-29 | 2016-05-25 | 集美大学 | Waste incineration treatment system |
| CN105627319A (en) * | 2015-11-29 | 2016-06-01 | 集美大学 | Garbage incineration processing system and method for reducing toxicity of fly ash |
| CN105823059A (en) * | 2016-06-18 | 2016-08-03 | 集美大学 | Fluidized bed waste incineration treatment system |
| CN108036324A (en) * | 2018-01-15 | 2018-05-15 | 烟台龙源电力技术股份有限公司 | A kind of burning processing system and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100402927C (en) * | 2004-12-29 | 2008-07-16 | 清华大学 | Integrated plant of circulating fluid bed type boiler for burnning garbage and purifying tail gas |
-
1999
- 1999-07-09 CN CN 99114997 patent/CN1120955C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1968745B (en) * | 2004-06-15 | 2011-05-18 | 佳能株式会社 | Structure designed for adsorption of DNA intercalators |
| CN101747145A (en) * | 2009-12-20 | 2010-06-23 | 周开根 | End purification system for gasifying and liquefying domestic garbage and organic waste |
| CN101747145B (en) * | 2009-12-20 | 2012-12-26 | 周开根 | End purification system for gasifying and liquefying domestic garbage and organic waste |
| CN105605586A (en) * | 2015-11-29 | 2016-05-25 | 集美大学 | Waste incineration treatment system with high-temperature dust remover |
| CN105605587A (en) * | 2015-11-29 | 2016-05-25 | 集美大学 | Waste incineration treatment system |
| CN105627319A (en) * | 2015-11-29 | 2016-06-01 | 集美大学 | Garbage incineration processing system and method for reducing toxicity of fly ash |
| CN105823059A (en) * | 2016-06-18 | 2016-08-03 | 集美大学 | Fluidized bed waste incineration treatment system |
| CN108036324A (en) * | 2018-01-15 | 2018-05-15 | 烟台龙源电力技术股份有限公司 | A kind of burning processing system and method |
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| Publication number | Publication date |
|---|---|
| CN1120955C (en) | 2003-09-10 |
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