CN104623854A - Method for treating incineration fly ash by using plasma fluidized bed - Google Patents
Method for treating incineration fly ash by using plasma fluidized bed Download PDFInfo
- Publication number
- CN104623854A CN104623854A CN201410850031.6A CN201410850031A CN104623854A CN 104623854 A CN104623854 A CN 104623854A CN 201410850031 A CN201410850031 A CN 201410850031A CN 104623854 A CN104623854 A CN 104623854A
- Authority
- CN
- China
- Prior art keywords
- plasma
- stainless steel
- flying ash
- fly ash
- incineration fly
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000010881 fly ash Substances 0.000 title abstract 6
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 30
- 239000010935 stainless steel Substances 0.000 claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 17
- 239000012159 carrier gas Substances 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 4
- 239000002957 persistent organic pollutant Substances 0.000 claims abstract description 3
- 238000005243 fluidization Methods 0.000 claims description 20
- 239000010453 quartz Substances 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000005281 excited state Effects 0.000 claims description 3
- 230000005012 migration Effects 0.000 claims description 3
- 238000013508 migration Methods 0.000 claims description 3
- 150000003254 radicals Chemical class 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 230000002688 persistence Effects 0.000 claims description 2
- 230000000593 degrading effect Effects 0.000 abstract 1
- 230000001089 mineralizing effect Effects 0.000 abstract 1
- 210000002381 plasma Anatomy 0.000 description 22
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 230000002085 persistent effect Effects 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/10—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by subjecting to electric or wave energy or particle or ionizing radiation
- A62D3/19—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by subjecting to electric or wave energy or particle or ionizing radiation to plasma
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/08—Toxic combustion residues, e.g. toxic substances contained in fly ash from waste incineration
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
- A62D2101/28—Organic substances containing oxygen, sulfur, selenium or tellurium, i.e. chalcogen
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Treating Waste Gases (AREA)
- Plasma Technology (AREA)
Abstract
The invention relates to a method for treating incineration fly ash by using a plasma fluidized bed. The method comprises the following steps: putting incineration fly ash to be treated into a plasma device which comprises the plasma fluidized bed and a high-voltage power supply; introducing carrier gas through a gas inlet; starting the high-voltage power supply; and forming disruptive discharge in a minimum-distance part between electrodes by virtue of knife-shaped stainless steel electrodes in the presence of high-voltage power, driving the disruptive discharge to quickly slide downstream along the surfaces of the electrodes by the carrier gas to form non-thermal arc plasma, converting the carrier gas into active gas containing a large quantity of charged particles, excited species, free radicals, electrons and photons, driving the incineration fly ash in a stainless steel mesh to be in a fluidized state by the active gas passing through the conical stainless steel mesh so as to form the plasma fluidized bed, and degrading and mineralizing persistent organic pollutants in the incineration fly ash to form inorganic matter by processes of diffusing, adsorbing, migrating and chemically reacting plasma by virtue of the active gas, thereby achieving the purpose of treating the incineration fly ash.
Description
Technical field
The present invention relates to field for the treatment of of solid waste, be specifically related to a kind of plasma fluidisation bed process flying ash method.
Background technology
Along with the application of solid waste incineration technology, the flying dust produced in burning process, because being rich in poisonous chemical substance, as heavy metal, persistent organism, is accredited as danger wastes, needs to carry out harmless treatment.At present relatively more conventional flying ash processing method: the isolation technics of physics or chemical method, curing/stabilizing technology and heat treatment technics.Only have heat treatment technics fundamentally can solve heavy metal and the persistent organism pollution problem of flying ash, but heat treatment technics, as melting, equipment investment and operating cost higher.
Summary of the invention
For solving the problem, the present invention proposes a kind of plasma fluidisation bed process flying ash method.
The present invention, for reaching above object, is realized by following technical scheme:
There is provided a kind of plasma fluidisation bed process flying ash method, 1) pending flying ash is put into the stainless (steel) wire of the taper of plasma device, 2) carrier gas is introduced by air inlet, as air, oxygen and steam, 3) high voltage source connecting knife-edge stainless steel electrode is started, 4) knife-edge stainless steel electrode minimum distance formation disruptive discharge in-between the electrodes under the effect of high-tension electricity, carrier gas drives disruptive discharge to slide along electrode surface to downstream fast and forms Non-thermal arc plasma, carrier gas is made to be transformed into containing a large amount of charged particles, excited state species, free radical, the active gases of electronics and photon, active gases is through cone-shaped stainless steel net, the flying ash in stainless (steel) wire is driven to form fluidisation state, form plasma fluidisation bed, active gases is by diffusion, absorption, migration and plasma chemical reaction process, degraded and mineralising flying ash in persistence organic pollutant (as polycyclic aromatic hydrocarbon and dioxin) be inorganic matter, reach the object of process flying ash, tail gas containing catabolite is discharged from gas outlet.
Described plasma device, comprises plasma fluidisation bed and high voltage source; Plasma fluidisation bed is made up of air inlet, quartz container, tetrafluoroethene base, knife-edge stainless steel electrode, cone-shaped stainless steel net, flying ash, quartz cover and exhaust outlet; Quartz container is connected with quartz cover and forms cavity, tetrafluoroethene base is placed in the bottom of quartz container, at least 2 knife-edge stainless steel electrode symmetries are fixed on tetrafluoroethene base, and are connected with high voltage source by high-voltage line, and air inlet is placed in tetrafluoroethene base center; Cone-shaped stainless steel net is placed in quartz container top central axis place, and is fixed on directly over electrode, and pending flying ash is placed in cone-shaped stainless steel net.
The present invention has following technical characterstic: combine plasma elevated chemical activation characteristics and the good advantage of fluid-bed heat transfer mass transfer effect, can run at normal temperatures, structure is simple, easy to operate, is a new technology with commercial Application potentiality.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In Fig. 1: A front view, B profile, 1 plasma fluidisation bed, 2 high voltage sourcies, 3 air inlets, 4 quartz containers, 5 tetrafluoroethene bases, 6 knife-edge stainless steel electrodes, 7 plasmas, 8 cone-shaped stainless steel nets, 9 flying ash, 10 quartz covers, 11 exhaust outlets.
Detailed description of the invention
As shown in Figure 1, plasma device of the present invention comprises plasma fluidisation bed 1 and high voltage source 2; Plasma fluidisation bed 1 is made up of air inlet 3, quartz container 4, tetrafluoroethene base 5, knife-edge stainless steel electrode 6, cone-shaped stainless steel net 8, flying ash 9, quartz cover 10 and exhaust outlet 11; Quartz container 4 is connected with quartz cover 10 and forms cavity, tetrafluoroethene base 5 is placed in the bottom of quartz container 4, at least 2 knife-edge stainless steel electrode 6 symmetries are fixed on tetrafluoroethene base 5, and are connected with high voltage source 3 by high-voltage line, and air inlet 3 is placed in tetrafluoroethene base 5 center; Cone-shaped stainless steel net 8 is placed in quartz container 4 top central axis place, and is fixed on directly over electrode 6, and pending flying ash 9 is placed in cone-shaped stainless steel net 8.
Flying ash takes from certain grate furnace municipal solid waste incinerator sack cleaner domestic, and 1) pending 15g flying ash is put into 300 object cone-shaped stainless steel nets, 2) 201/min atmospheric carrier air is introduced by air inlet, 3) high voltage source 2 connecting knife-edge stainless steel electrode 6 is started, 4) knife-edge stainless steel electrode 6 minimum distance formation disruptive discharge in-between the electrodes under the effect of high-tension electricity, carrier gas drives disruptive discharge to slide along electrode surface to downstream fast and forms Non-thermal arc plasma, carrier gas is made to be transformed into containing a large amount of charged particles, excited state species, free radical, the active gases of electronics and photon, active gases is through cone-shaped stainless steel net, the flying ash in stainless (steel) wire is driven to form fluidisation state, form plasma fluidisation bed, active gases is by diffusion, absorption, migration and plasma chemical reaction process, degraded and mineralising flying ash in pollutant, reach the object of process flying ash.Experiment condition is: supply frequency is 50Hz, and high voltage source 2 supply voltage is 10kV; Employing carrier gas is air, carrier gas flux is 201/min, in flying ash two dislike degradation efficiencies along with the time increase, the concentration of dioxin is totally in once downward trend, degradation efficiency progressively rises, plasma is out after 20min, and degradation efficiency reaches 98.2%, illustrates that plasma fluidisation bed process flying ash is a kind of effective method.
Claims (2)
1. a plasma fluidisation bed process flying ash method, is characterized in that the step of the method is as follows: the stainless (steel) wire pending flying ash being put into the taper of plasma device, carrier gas is introduced, as air, oxygen and steam by air inlet, start the high voltage source connecting knife-edge stainless steel electrode, knife-edge stainless steel electrode is minimum distance formation disruptive discharge in-between the electrodes under the effect of high-tension electricity, carrier gas drives disruptive discharge to slide along electrode surface to downstream fast and forms Non-thermal arc plasma, carrier gas is made to be transformed into containing a large amount of charged particles, excited state species, free radical, the active gases of electronics and photon, active gases is through cone-shaped stainless steel net, the flying ash in stainless (steel) wire is driven to form fluidisation state, form plasma fluidisation bed, active gases is by diffusion, absorption, migration and plasma chemical reaction process, degraded and mineralising flying ash in persistence organic pollutant be inorganic matter, reach the object of process flying ash, tail gas containing catabolite is discharged from gas outlet.
2. a kind of plasma fluidisation bed process flying ash method according to claim 1, is characterized in that described plasma device, comprises plasma fluidisation bed and high voltage source; Plasma fluidisation bed is made up of air inlet, quartz container, tetrafluoroethene base, knife-edge stainless steel electrode, cone-shaped stainless steel net, flying ash, quartz cover and exhaust outlet; Quartz container is connected with quartz cover and forms cavity, tetrafluoroethene base is placed in the bottom of quartz container, at least 2 knife-edge stainless steel electrode symmetries are fixed on tetrafluoroethene base, and are connected with high voltage source by high-voltage line, and air inlet is placed in tetrafluoroethene base center; Cone-shaped stainless steel net is placed in quartz container top central axis place, and is fixed on directly over electrode, and pending flying ash is placed in cone-shaped stainless steel net.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850031.6A CN104623854A (en) | 2014-12-23 | 2014-12-23 | Method for treating incineration fly ash by using plasma fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850031.6A CN104623854A (en) | 2014-12-23 | 2014-12-23 | Method for treating incineration fly ash by using plasma fluidized bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104623854A true CN104623854A (en) | 2015-05-20 |
Family
ID=53203387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410850031.6A Pending CN104623854A (en) | 2014-12-23 | 2014-12-23 | Method for treating incineration fly ash by using plasma fluidized bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104623854A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106984633A (en) * | 2017-05-03 | 2017-07-28 | 江苏天楹环保能源成套设备有限公司 | Utilize the method for plasma torch recycling treatment incineration of refuse flyash |
| CN109600899A (en) * | 2019-01-11 | 2019-04-09 | 合肥中科远望环保科技有限公司 | A kind of oxygen flame compound plasma torch |
| CN109621715A (en) * | 2019-01-02 | 2019-04-16 | 浙江大学 | A kind of sliding arc plasma organic processing unit in conjunction with catalyst |
| CN111298741A (en) * | 2020-02-27 | 2020-06-19 | 浙江大学 | Plasma liquid phase treatment device and method for fly ash |
| CN114679832A (en) * | 2022-04-08 | 2022-06-28 | 福州大学 | Sliding arc discharge plasma device and preparation method of nano powder |
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Patent Citations (5)
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Non-Patent Citations (2)
| Title |
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| YAN JIAN-HUA等: "Destruction of PCDD/Fs by gliding arc discharges", 《JOURNAL OF ENVIRONMENTAL SCIENCES》 * |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106984633A (en) * | 2017-05-03 | 2017-07-28 | 江苏天楹环保能源成套设备有限公司 | Utilize the method for plasma torch recycling treatment incineration of refuse flyash |
| CN106984633B (en) * | 2017-05-03 | 2019-02-01 | 江苏天楹环保能源成套设备有限公司 | Utilize the method for plasma torch recycling treatment incineration of refuse flyash |
| CN109621715A (en) * | 2019-01-02 | 2019-04-16 | 浙江大学 | A kind of sliding arc plasma organic processing unit in conjunction with catalyst |
| CN109600899A (en) * | 2019-01-11 | 2019-04-09 | 合肥中科远望环保科技有限公司 | A kind of oxygen flame compound plasma torch |
| CN111298741A (en) * | 2020-02-27 | 2020-06-19 | 浙江大学 | Plasma liquid phase treatment device and method for fly ash |
| CN111298741B (en) * | 2020-02-27 | 2024-03-29 | 浙江大学 | Plasma liquid phase treatment device and method for fly ash |
| CN114679832A (en) * | 2022-04-08 | 2022-06-28 | 福州大学 | Sliding arc discharge plasma device and preparation method of nano powder |
| CN114679832B (en) * | 2022-04-08 | 2023-05-26 | 福州大学 | Sliding arc discharge plasma device and nano powder preparation method |
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Application publication date: 20150520 |