CN101708424B - Method for removing dioxin in waste incineration flue gas and equipment thereof - Google Patents

Method for removing dioxin in waste incineration flue gas and equipment thereof Download PDF

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Publication number
CN101708424B
CN101708424B CN2009102502586A CN200910250258A CN101708424B CN 101708424 B CN101708424 B CN 101708424B CN 2009102502586 A CN2009102502586 A CN 2009102502586A CN 200910250258 A CN200910250258 A CN 200910250258A CN 101708424 B CN101708424 B CN 101708424B
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flue gas
dioxin
active carbon
outlet
inlet
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CN2009102502586A
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CN101708424A (en
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韩檬
高建东
张曙光
徐朝阳
刘汉桥
郝永俊
董珂
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TAIDA ENVIRONMENTAL PROTECTION CO Ltd TIANJIN
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TAIDA ENVIRONMENTAL PROTECTION CO Ltd TIANJIN
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

Abstract

The invention discloses a method for removing dioxin in waste incineration flue gas, which comprises the following steps of: a) first adopting a combined process of a Venturi jet and a dry dust collector to remove the dioxin; b) then adopting filtration equipment to remove the dioxin; c) allowing granular activated carbon absorbing the dioxin to be discharged through the bottom of the filtration equipment and enter a crushing machine to be crushed into powdery activated carbon; d) supplying the powdery activated carbon to the Venturi jet for use; and e) discharging purified waste incinerationflue gas which is output from a flue gas outlet of the filtration equipment into the atmosphere through a chimney. The invention also discloses equipment for implementing the method. The method and the equipment can increase the removal rate of the dioxin and reduce operating cost.

Description

A kind of removal methods and equipment of waste incineration flue gas Zhong bioxin
Technical field
The present invention relates to a kind of waste gas processing method, particularly a kind of removal methods of dioxin in waste incineration flue gas.The invention still further relates to the equipment of this method of realization.
Background technology
The processing of rubbish is common in the burning mode.Because rubbish is rich in heavy metals such as hydro carbons, organic chloride and copper, in burning process, hydro carbons thing and organic chloride can generate dioxin through chemical reaction in the time of 280~450 °.In the reaction of formation of above-mentioned dioxin, the contained copper class material (metallic copper, cupric oxide and copper ion) of rubbish has then played the effect of catalyst.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.People once attempted adopting granular active carbon adsorbing and removing dioxin cheap and easy to get, but owing to exist a large amount of dusts to stop up active carbon in the flue gas, removal effect is not good enough.See also Fig. 1, at present domestic bulky refuse burns power plant and generally adopts the group technology of venturi type injector and dry collector to remove dioxin, be about to powdered active carbon and spray into flue by the venturi type injector, behind the adsorbing and removing dioxin with flue gas in dust together remove to be collected by dry collector, the dioxin in the flue gas can be reduced to 0.1ng/m 3(European Union's 2000 standards).Mainly there is following defective in said method: 1), must consume a large amount of powdered active carbons for the dioxins concentration in the flue gas of refuse burning is reduced to European Union's standard, and usually at 15~20kg/h, about 1,500,000 yuan of annual operating cost, business burden is heavy; 2) the dioxin removal efficiency is limited, the minimum 0.05~0.06ng/m that reduces to 3, and the powdered active carbon consumption that need be multiplied.
Present domestic resident is increasingly sharpened to the repulsion psychology of waste incineration power plant, is the dioxin emission problem owing to the look change of what is said or talked about after all, and EU countries is also stepping up to formulate strict more dioxin discharging new standard.Under above-mentioned background, waste incineration power plant must improve existing dioxin removing process, makes every effort to reduce operating cost when further improving the dioxin removal efficiency.
Summary of the invention
The present invention provides a kind of removal methods and equipment that can improve the dioxin removal efficiency and reduce the dioxin in waste incineration flue gas of operating cost for solving the technical problem that exists in the known technology.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of removal methods of dioxin in waste incineration flue gas, it is characterized in that, comprise the steps: a) to adopt the group technology of venturi type injector and dry collector to remove dioxin earlier; B) adopt filter plant to remove dioxin again, described filter plant is provided with two inlets and two outlets, an inlet is the granular active carbon inlet that is positioned at its top, another inlet is the flue gas of refuse burning inlet that is positioned at horizontal direction and is provided with NACF, an outlet is the flue gas of refuse burning outlet that is positioned at horizontal direction and is provided with NACF, another outlet is to be positioned at the outlet of the granular active carbon of its bottom, granular active carbon is sent into filter plant and mobile continuously vertically downward by top, and flue gas of refuse burning then along continuous straight runs passes filter plant; C) absorption dioxin granular active carbon after filtration device bottom escape and enter pulverizer, be ground into powdered active carbon; D) described powdered active carbon being supplied with described venturi type injector uses; E) go out the purification of filter plant exhanst gas outlet after flue gas of refuse burning enter atmosphere through chimney.
Described dry collector is a sack cleaner.
In order to realize said method, the technical solution used in the present invention is: a kind of equipment that removes of dioxin in waste incineration flue gas, comprise the venturi type injector that is connected in turn on the flue, dry collector, filter plant, chimney and be positioned at the pulverizer of described filter plant below, described venturi type injector comprises a powdered active carbon inlet and a jet that is positioned at flue, described filter plant is provided with two inlets and two outlets, an inlet is the granular active carbon inlet that is positioned at its top, another inlet is the flue gas of refuse burning inlet that is positioned at horizontal direction and is provided with NACF, an outlet is the flue gas of refuse burning outlet that is positioned at horizontal direction and is provided with NACF, another outlet is to be positioned at the outlet of the granular active carbon of its bottom, and the below of described granular active carbon outlet is provided with pulverizer.
Described dry collector is a sack cleaner.
Advantage and good effect that the present invention has are: 1) granular active carbon is cheap and easy to get, can partly remove dioxin, pulverizes to specific area behind the powdered active carbon enlarges markedly, and regains adsorption capacity, and the absorption utilization rate improves greatly.2) NACF is the efficient sorbing material that surmounts in granular active carbon, and it is remarkable not only to eliminate the dioxin effect, particle is also had the stronger effect of damming, but cost an arm and a leg.Lay the small amount of activated fiber at the filter plant smoke entrance, can under the condition of limited increase operating cost, avoid granular active carbon to stop up and lose efficacy, realize that simultaneously the essence of trace dioxin is taken off.
Description of drawings
Fig. 1 is the dioxin removal methods schematic flow sheet that present domestic waste incineration power plant generally adopts;
Fig. 2 is the schematic diagram that dioxin in waste incineration flue gas of the present invention removes equipment.
Among the figure: 1, flue gas of refuse burning; 2, powdered active carbon; 3, venturi type injector; 4, dry collector; 5, chimney; 6, granular active carbon; 7, filter plant; 8, NACF; 9, pulverizer.
The specific embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 2, the removal methods of a kind of dioxin in waste incineration flue gas of the present invention,
Dioxin adopts the TCR TECORA systematic sampling of U.S. SGS company, utilizes high-resolution gas-chromatography/high resolution mass spectrum to carry out trace analysis.
Embodiment 1:
Flue gas flow: 83816m 3/ h, dioxin concentration: 5ng/m 3(above each value is for being converted into the butt value of 11% oxygen content)
At first spray into 6kg/h powdered active carbon 2 to flue by venturi type injector 3, dioxin in the flue gas of refuse burning is tentatively removed, flue gas enters sack cleaner 4 dedustings afterwards, and residual micro-dust is dammed by about 10kg NACF 8 when flue gas is flowed through filter plant 7 inlets.Flue gas passes about 20kg NACF 8 that filter plant 7 back dioxin are adsorbed in granular active carbon 6 and smoke outlet in succession, and content is reduced to 0.02ng/m 3, discharge through chimney 5.The granular active carbon 6 that shift out filter plant 7 bottoms enters pulverizer 9 and is ground into powdered active carbon 2, and the powdered active carbon 2 that sprays in total amount and the flue is identical.Above-mentioned filter plant 7 adopts the patent No. 200820142243.9 disclosed fluid units.
Through preresearch estimates, only about 50~700,000 yuan of the annual operating cost of said method, the dioxin concentration of emission only is 0.02ng/m 3, compare with the obvious advantage with the existing technology among Fig. 1.
Embodiment 2:
Flue gas flow: 92500m 3/ h, dioxin concentration: 10ng/m 3(above each value is for being converted into the butt value of 11% oxygen content)
At first spray into 10kg/h powdered active carbon 2 to flue by venturi type injector 3, dioxin in the flue gas of refuse burning is tentatively removed, flue gas enters sack cleaner 4 dedustings afterwards, and residual micro-dust is dammed by about 10kg NACF 8 when flue gas is flowed through filter plant 7 inlets.Flue gas passes about 40kg NACF 8 that filter plant 7 back dioxin are adsorbed in granular active carbon 6 and smoke outlet in succession, and content is reduced to 0.02ng/m 3, discharge through chimney 5.The granular active carbon 6 that shift out filter plant 7 bottoms enters pulverizer 9 and is ground into powdered active carbon 2, and the powdered active carbon 2 that sprays in total amount and the flue is identical.
Through preresearch estimates, about 1,000,000 yuan of the annual operating cost of said method, dioxin concentration of emission only are 0.03ng/m 3, compare with the obvious advantage with the existing technology among Fig. 1.
The equipment of realizing said method comprises the venturi type injector 3 that is connected with flue successively, dry collector 4, filter plant 7, chimney 5 and be positioned at the pulverizer 9 of filter plant 7 belows, described venturi type injector 3 is provided with inlet and jet that is positioned at flue of a powdery active carbon 2, described dry collector 4 and chimney 5 respectively have a flue gas of refuse burning import and outlet, described filter plant 7 is provided with two inlets and two outlets, an inlet is granular active carbon 6 inlets that are positioned at its top, another inlet is the flue gas of refuse burning inlet that is positioned at horizontal direction and is provided with NACF 8, an outlet is the flue gas of refuse burning outlet that is positioned at horizontal direction and is provided with NACF 8, another outlet is to be positioned at 6 outlets of the granular active carbon of its bottom, the below of described granular active carbon 6 outlets is provided with pulverizer 9, and described pulverizer 9 is provided with an inlet and an outlet.Granular active carbon 6 is also moved down continuously by the granular active carbon 6 inlet addings on filter plant 7 tops, enters pulverizer 9 inlets of filter plant 7 belows after granular active carbon 6 outlets in bottom are shifted out.Granular active carbon 6 is pulverized for discharging and deliver to venturi type injector 3 inlets along pulverizer 9 outlets in powdered active carbon 2 backs, after jet directly sprays into flue.Flue gas of refuse burning 1 is removed the back at dioxin by powdered active carbon 2, granular active carbon 6 and NACF 8 orders and enters atmosphere by chimney 5 along flue direction flow through successively venturi type injector 3, dry collector 4 and filter plant 7.Above-mentioned dry collector 4 is a sack cleaner.
Although in conjunction with the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.

Claims (4)

1. the removal methods of a dioxin in waste incineration flue gas is characterized in that, comprises the steps:
A) adopt the group technology of venturi type injector and dry collector to remove dioxin earlier;
B) adopt filter plant to remove dioxin again, described filter plant is provided with two inlets and two outlets, an inlet is the granular active carbon inlet that is positioned at its top, another inlet is the flue gas of refuse burning inlet that is positioned at horizontal direction and is provided with NACF, an outlet is the flue gas of refuse burning outlet that is positioned at horizontal direction and is provided with NACF, another outlet is to be positioned at the outlet of the granular active carbon of its bottom, granular active carbon is sent into filter plant and mobile continuously vertically downward by top, and flue gas of refuse burning then along continuous straight runs passes filter plant;
C) absorption dioxin granular active carbon after filtration device bottom escape and enter pulverizer, be ground into powdered active carbon;
D) described powdered active carbon being supplied with described venturi type injector uses;
E) go out the purification of filter plant exhanst gas outlet after flue gas of refuse burning enter atmosphere through chimney.
2. the removal methods of dioxin in waste incineration flue gas according to claim 1 is characterized in that, described dry collector is a sack cleaner.
3. the equipment that removes of a dioxin in waste incineration flue gas, it is characterized in that, comprise the venturi type injector that is connected in turn on the flue, dry collector, filter plant and chimney and be positioned at the pulverizer of described filter plant below, described venturi type injector comprises a powdered active carbon inlet and a jet that is positioned at flue, described filter plant is provided with two inlets and two outlets, an inlet is the granular active carbon inlet that is positioned at its top, another inlet is the flue gas of refuse burning inlet that is positioned at horizontal direction and is provided with NACF, an outlet is the flue gas of refuse burning outlet that is positioned at horizontal direction and is provided with NACF, another outlet is to be positioned at the outlet of the granular active carbon of its bottom, and the below of described granular active carbon outlet is provided with pulverizer.
4. the equipment that removes of dioxin in waste incineration flue gas according to claim 3 is characterized in that, described dry collector is a sack cleaner.
CN2009102502586A 2009-12-11 2009-12-11 Method for removing dioxin in waste incineration flue gas and equipment thereof Active CN101708424B (en)

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* Cited by examiner, † Cited by third party
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CN106139840A (en) * 2015-04-16 2016-11-23 杭州中兵环保股份有限公司 Purifier and method containing low concentration VOC waste gas
CN107376574A (en) * 2017-09-04 2017-11-24 张荣军 Flue filter
CN109351186A (en) * 2018-12-17 2019-02-19 郴州市泰益表面涂层技术有限公司 The degradation treatment system of dioxin in life medical refuse burning exhaust gas
CN115624867B (en) * 2022-12-21 2023-03-07 佛山(华南)新材料研究院 Preparation method of filter membrane

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2634307Y (en) * 2003-06-27 2004-08-18 清华大学 Multistage incineration equipment of rotary kiln garbage gasifying and carbon ash cosmelting
CN201253533Y (en) * 2008-08-05 2009-06-10 合加资源发展股份有限公司 Medical refuse burning tail-gas purification device
CN201596445U (en) * 2009-12-11 2010-10-06 天津泰达环保有限公司 Equipment for removing dioxins in waste incineration smoke

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2634307Y (en) * 2003-06-27 2004-08-18 清华大学 Multistage incineration equipment of rotary kiln garbage gasifying and carbon ash cosmelting
CN201253533Y (en) * 2008-08-05 2009-06-10 合加资源发展股份有限公司 Medical refuse burning tail-gas purification device
CN201596445U (en) * 2009-12-11 2010-10-06 天津泰达环保有限公司 Equipment for removing dioxins in waste incineration smoke

Non-Patent Citations (3)

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Title
JP特開2001-276569A 2001.10.09
JP特開平11-104458A 1999.04.20
JP特開平11-57405A 1999.03.02

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