CN110394351A - The Short flow method and its system of dioxin in a kind of degradation flying dust - Google Patents
The Short flow method and its system of dioxin in a kind of degradation flying dust Download PDFInfo
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- CN110394351A CN110394351A CN201910679862.4A CN201910679862A CN110394351A CN 110394351 A CN110394351 A CN 110394351A CN 201910679862 A CN201910679862 A CN 201910679862A CN 110394351 A CN110394351 A CN 110394351A
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- Prior art keywords
- flying dust
- dioxin
- heating
- mixture
- tail gas
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- 239000000428 dust Substances 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000015556 catabolic process Effects 0.000 title claims abstract description 31
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 29
- 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 title claims abstract 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 70
- 239000000203 mixture Substances 0.000 claims abstract description 46
- 238000002156 mixing Methods 0.000 claims abstract description 44
- 239000007800 oxidant agent Substances 0.000 claims abstract description 31
- 230000001590 oxidative effect Effects 0.000 claims abstract description 31
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 21
- 238000010521 absorption reaction Methods 0.000 claims abstract description 20
- 238000005406 washing Methods 0.000 claims abstract description 15
- 238000000746 purification Methods 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 12
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 239000003345 natural gas Substances 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000011790 ferrous sulphate Substances 0.000 claims description 4
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 4
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 4
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 4
- 239000012286 potassium permanganate Substances 0.000 claims description 4
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- MMCOUVMKNAHQOY-UHFFFAOYSA-N carbonoperoxoic acid Chemical compound OOC(O)=O MMCOUVMKNAHQOY-UHFFFAOYSA-N 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 claims description 2
- 238000009827 uniform distribution Methods 0.000 claims description 2
- 230000000593 degrading effect Effects 0.000 claims 7
- 230000005611 electricity Effects 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 210000002700 urine Anatomy 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 11
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 238000004134 energy conservation Methods 0.000 abstract description 5
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 58
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 25
- 239000002956 ash Substances 0.000 description 25
- 229910052802 copper Inorganic materials 0.000 description 25
- 239000010949 copper Substances 0.000 description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 16
- 239000003546 flue gas Substances 0.000 description 16
- 239000000126 substance Substances 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 238000004140 cleaning Methods 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 10
- 230000000185 dioxinlike effect Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 239000003513 alkali Substances 0.000 description 7
- 229910001385 heavy metal Inorganic materials 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 150000002013 dioxins Chemical class 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 238000006298 dechlorination reaction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910001431 copper ion Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- -1 photodissociation Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 206010002660 Anoxia Diseases 0.000 description 1
- 241000976983 Anoxia Species 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 150000003868 ammonium compounds Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000007953 anoxia Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 150000008422 chlorobenzenes Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- VTIIJXUACCWYHX-UHFFFAOYSA-L disodium;carboxylatooxy carbonate Chemical compound [Na+].[Na+].[O-]C(=O)OOC([O-])=O VTIIJXUACCWYHX-UHFFFAOYSA-L 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002906 medical waste Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229940045872 sodium percarbonate Drugs 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- AQLJVWUFPCUVLO-UHFFFAOYSA-N urea hydrogen peroxide Chemical compound OO.NC(N)=O AQLJVWUFPCUVLO-UHFFFAOYSA-N 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/30—Incineration ashes
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention disclose it is a kind of degradation flying dust in dioxin Short flow method and its system.The Short flow method is to mix flying dust with oxidant, obtains mixture；Mixture is heated, the gaseous product of generation is collected, obtains the flying dust of removing dioxin；By gaseous product washing absorption treatment and purification, tail gas up to standard is discharged.The system comprises mixing arrangements, heating decomposition apparatus, tail gas collecting device, exhaust gas cleaner, the flying dust supply storehouse and/or oxidant supply storehouse of mixing arrangement are set to mixing chamber top and are connected to, or flying dust supply storehouse and/or oxidant supply storehouse are connected to through conveying device with mixing chamber, mixing chamber is connect with heating decomposition apparatus feeding inlet, heating decomposition apparatus is the obturator comprising feeding inlet, discharge gate and tail gas mouth, tail gas collecting device air intake is connected to heating decomposition apparatus tail gas mouth, and tail gas collecting device gas outlet is passed through exhaust gas cleaner.The present invention has the characteristics that process is short, removal efficiency is high, energy conservation and environmental protection, processing cost are low.
Description
Technical field
The invention belongs to technical field of environmental management, and in particular to a kind of process is short, removal efficiency is high, energy conservation and environmental protection, place
Manage at low cost, dioxin removal efficiency up to 85% or more degradation flying dust in dioxin Short flow method and its system.
Background technique
Dioxin-like chemical has the characteristics that with low aqueous solubility, fat-solubility, and " (carcinogenic, teratogenesis causes to dash forward for three causes
Become) " effect, can enduringly exist in the environment, remote districts can be reached by long-distance migration, be not easy to be dropped by biology
Solution, photodissociation, chemical breakdown are difficult to be decomposed in the environment, moreover it is possible to be accumulated in food chain, to animal and the huge prestige of human body structure
The side of body.
Reclaimed copper contains plastics and is mingled with, and during high melt, charcoal therein, chlorine, oxygen etc. are easily integrated into shape together
At more dioxin, it is enriched in flying dust after being smelted dust absorption.In addition, house refuse, medical waste etc. were being burned
Cheng Zhonghui is generated largely containing the flying dust of dioxin.Contain the lasting volatile organic matters such as chlorobenzene class, dioxin in flying dust
(POPs), and its particle is minimum extremely light, easily escapes and floats in atmospheric environment, causes serious soil, water body, big compression ring
Border pollution.Therefore, it is necessary to carry out removing processing to the dioxin-like chemical in flying dust.
The technology for removing dioxin in flying dust in the prior art mainly has: (1) fusion method is heated to (1300 DEG C of melting temperature
Left and right) more than, dioxin is decomposed；(2) vapor phase hydrogen reduction method is heated to 850 DEG C or more in closed container, in hydrogen
Dechlorination under reduction；(3) photochemical breakdown method makes dioxin dechlorination using irradiations such as ultraviolet lights, while generating ozone, due to
The oxidation of ozone is allowed to decompose；(4) electron beam decomposition technique using electron beam by exhaust gas oxygen and the generations such as water it is living
Property the easy reactive materials such as oxygen, and then destroy the chemical structure of dioxin；(5) low temperature plasma applying pulse voltage generates not
Continuous non-destructive electric discharge, activates dioxin and is allowed to ionize, decompose.
Currently, the U.S., Germany, Japan and other countries environmental protection department recommend domestic garbage incineration flyash processing technique
For melt process.Although fusion technology has the advantages that so that lime-ash is reduced nearly half, dioxin is decomposed destroys completely, but due to processing
The problems such as temperature is higher, while the low-melting-point metal to volatilize needs to carry out harmless treatment to cause high cost, becomes it and pushes away
The major obstacle extensively applied.Developing direction that is economic, should being efficiently dioxin removal technology in flying dust.On this basis, low
Warm dechlorination technology has obtained preferable development.The major requirement of low temperature antichloration technology are as follows: 1. anoxia condition；2. reaction temperature is
250~400 DEG C；3. the residence time is greater than 1h；4. the exhaust temperature of flying dust is lower than 60 DEG C after processing.
Foreign countries have many inventors to propose that the substance rich in dioxin is made to be converted into harmless object using low temperature wet process catalysis method
The method of matter.For example, United States Patent (USP) US6291737B1 describe it is a kind of degradation flying dust in dioxin method, make rich in two dislike
The flying dust of English is sufficiently mixed with amine or ammonium compounds, and 1~2h is reacted under conditions of 300 DEG C or slightly less than 300 DEG C, can handle
Dioxin degradation in flying dust；US6323385B1 and JP6632973B1 disclosed in 2003 a kind of dioxin substance (gas,
Liquid, powder or particle) it is mixed with acid solution (hydrochloric acid or sulfuric acid) acidification, under the conditions of catalyst (copper ion) is existing, only
Nearly 100 DEG C need to be heated to, even lower than 100 DEG C of temperature can effectively be degraded into dioxin harmless substance, at these
Reason method is obviously low compared with aforementioned processing methods energy consumption.But the alkalinity of city garbage burning flying ash be it is king-sized, pH value connects
Nearly 14, it is such as handled with US6291737B1 patented method, amine/ammonium class object can be made to be converted into Ammonia valatilization, be bound to cause reaction materials
Waste, while influencing treatment effect；And the dioxin in flying dust is handled with the patented method of US6323385B1 patent, though place
Reason temperature is low, and energy consumption is less, but to spend a large amount of acid solutions, and processing cost is still high, while the high use mentioned in patent
It measures catalyst (copper ion), will increase the load of subsequent water process.
CN101293173B describes a kind of new method, first with two evils in aqueous surfactant solution extracting flying dust
English separates dioxin from flying dust, after the extract rich in dioxin of acquisition is acidified, is being passed through oxygen or oxygen-enriched
30~100 DEG C are heated under conditions of air, 1~100h of processing can destroy dioxin oxidative degradation.But needs size mixing, take out
It mentions, dense or filtering, extract acidification, the processes such as oxygen oxidation degradation, process flow is long, and the processing time is long, while also needing
Handle a large amount of waste water.
Summary of the invention
The present invention is in view of the problems of the existing technology and insufficient, that the present invention provides a kind of processes is short, removal efficiency is high,
Energy conservation and environmental protection, processing cost be low, dioxin removal efficiency is up to the Short flow method of dioxin in 85% or more degradation flying dust, also mentions
A kind of system for realizing the Short flow method of dioxin in degradation flying dust is supplied.
The Short flow method of dioxin is achieved in that including mixing, heating degradation, tail in degradation flying dust of the invention
Gas purifying step, specifically includes:
A, it mixes: flying dust being uniformly mixed with oxidant, obtains mixture；
B, heating degradation: mixture is heated, and is collected simultaneously the gaseous product of generation, and heating terminates to obtain flying for removing dioxin
Ash；
C, by the gaseous product washing absorption treatment and purification of step B, tail gas up to standard tail gas clean-up: is discharged after purification.
The short route system of dioxin is achieved in that including mixing arrangement, heating drop in degradation flying dust of the invention
Device, tail gas collecting device, exhaust gas cleaner are solved, the mixing arrangement includes flying dust supply storehouse, oxidant supply storehouse, stirring
Storehouse, the flying dust supply storehouse and/or oxidant supply storehouse are set to the top of mixing chamber and in communication or flying dust supply storehouse
And/or the discharge port in oxidant supply storehouse is connected to by conveying device with the feed inlet of mixing chamber, the mixing chamber, which is provided with, to be stirred
It mixes mechanism and is connect with driving device, the feeding port of the mixing chamber is connect with the feeding inlet of heating decomposition apparatus, the heating
The discharge gate of decomposition apparatus is discharged the flying dust of low dioxin, the heating decomposition apparatus be include feeding inlet, discharge gate, be set to
The air intake of the obturator of the tail gas mouth on top, the tail gas collecting device is connected to the tail gas mouth of heating decomposition apparatus, institute
The gas outlet for stating tail gas collecting device is passed through exhaust gas cleaner, purified exhaust emissions.
Compared with the prior art, the invention has the following beneficial effects:
1, the present invention is quick in furnace internal oxidition agent then with certain thickness by heating furnace by mixing flying dust with oxidant
It degrades dioxin, the tail gas degraded is subjected to washing absorption processing, process is short, mesh of fast eliminating dioxin to reach
, the removal efficiency of dioxin is up to 85% or more in flying dust.
2, in the present invention mixture of flying dust and oxidant 80~400 DEG C at a temperature of achieve that the drop of dioxin
Solution is not only substantially less than temperature needed for melting flying dust in the prior art, so that the production energy consumption of removing dioxin is effectively reduced,
And also avoid conventional high-temperature atmosphere and will cause part heavy metal (such as mercury and cadmium) gasification and further pollute environment, entirely
Process energy conservation environmental protection.
3, the flue gas that the heated degradation of the present invention generates washing absorption after collecting is handled, and can not only be removed in flue gas
Other organic pollutants and dust, and the flue-gas temperature through Collecting and dealing is substantially less than 300~500 DEG C of dioxin again
Synthesis temperature can avoid recombining dioxin, so as to the dioxin contamination in removing smoke, so that the discharge of flue gas is remote
Lower than the limit value of permission.
4, oxidant source of the invention is wide, at low cost, and usage amount is less, so that in flying dust at the removing of dioxin
Cost is relatively low for reason.
Therefore, the present invention has that process is short, removal efficiency is high, energy conservation and environmental protection, processing cost are low, dioxin removal efficiency reaches
79% or more feature.
Detailed description of the invention
Fig. 1 is the schematic illustration of the short route system of the present invention；
1- mixing arrangement, 101- flying dust supply storehouse, and 102- oxidant supplies storehouse, 103- mixing chamber, 104- water tank, 2- heating drop
Solve device, 3- tail gas collecting device, 4- exhaust gas cleaner, 5- chimney.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples, but is not subject in any way to the present invention
Limitation, based on present invention teach that made any changes and modifications, all belong to the scope of protection of the present invention.
The Short flow method of dioxin includes mixing, heating degradation, tail gas clean-up step, tool in the degradation flying dust of the present invention
Body includes:
A, it mixes: flying dust being uniformly mixed with oxidant, obtains mixture；
B, heating degradation: mixture is heated, and is collected simultaneously the gaseous product of generation, and heating terminates to obtain flying for removing dioxin
Ash；
C, by the gaseous product washing absorption treatment and purification of step B, tail gas up to standard tail gas clean-up: is discharged after purification.
The oxidant is urea, in thiocarbamide, hydrogen peroxide, potassium permanganate, percarbonic acid calcium, ferrous sulfate, sodium peroxide
A kind of or any combination, the additive amount of the oxidant are the 0.1~20% of flying dust weight.
In the mixing step, oxidant and water are first mixed into the mixed solution that concentration is 1~10%, it then will mixing
Solution, flying dust add in proportion and add water mixing, obtain the mixture of humidity 5~30%；Or by the 0.5~20% of flying dust weight
The directly dry oxidant of addition, is then uniformly mixed, obtains dry mixture；Or by the 0.5~20% straight of flying dust weight
The dry oxidant of addition is connect, is then mixed with water, obtains the mixture of humidity 5~30%.
The mixed solution, flying dust add in proportion and add water or oxidant, flying dust to add in proportion and add water, through mixing
And it is granulated and obtains the granulate mixture of humidity 5~30%, 2~50mm of partial size.
In the heating degradation step by mixture uniform distribution be 1~10cm thickness the bed of material, then through 80~400 DEG C add
It is heat-treated 5~120min, is collected simultaneously the gaseous product of generation, the flying dust of removing dioxin is obtained after degradation.
The mixture is heated through electric heater unit, heated by gas device, heated by natural gas device or microwave heating equipment,
The frequency of the microwave heating equipment is 915 ± 50 MHz, 2450 ± 50 MHz or 5800 ± 50 MHz.
The microwave heating equipment is belt microwave heating device or electric heater unit, heated by gas device or natural
Gas heating device is rotary kiln, and mixture is uniformly interspersed among by distributing device on conveyer belt and by heating chamber, mixture liter
Temperature is to 120~400 DEG C and keeps the temperature 5~120min.
The microwave heating equipment or electric heater unit are that belt kiln device or pushed bat kiln device, mixture pass through distributing device
It is dispersed evenly in ceramic saggar or metal saggar, mixture is warming up to 120~400 DEG C and keeps the temperature 5~120min.
Tail gas up to standard is discharged through alkali liquid washing absorption cleaning in gaseous product in the tail gas clean-up step after purification.
As shown in Figure 1, the present invention degradation flying dust in dioxin short route system, including mixing arrangement 1, heating degradation
Device 2, tail gas collecting device 3, exhaust gas cleaner 4, the mixing arrangement 1 include flying dust supply storehouse 101, oxidant supply storehouse
102, mixing chamber 103, flying dust supply storehouse 101 and/or oxidant supply storehouse 102 be set to the top of mixing chamber 103 and with
Connection or the discharge port in flying dust supply storehouse 101 and/or oxidant supply storehouse 102 pass through conveying device and mixing chamber 103
Feed inlet connection, the mixing chamber 103 are provided with rabbling mechanism and connect with driving device, the feeding port of the mixing chamber 103
It is connect with the feeding inlet of heating decomposition apparatus 2, the flying dust of low dioxin is discharged in the discharge gate of the heating decomposition apparatus 2, described
Heating decomposition apparatus 2 be include feeding inlet, discharge gate, be set to top tail gas mouth obturator, exhaust collection dress
It sets 3 air intake to be connected to the tail gas mouth of heating decomposition apparatus 2, the gas outlet of the tail gas collecting device 3 is passed through tail gas clean-up
Device 4, purified exhaust emissions.
The mixing arrangement 1 further includes the water tank 104 being connected to mixing chamber 103.
Flying dust supply storehouse 101, oxidant supply storehouse 102 and water tank are respectively arranged with metering device and Electronic control
Valve, the metering device and motor-operated control valve are electrically connected with control device respectively.
The heating decomposition apparatus 2 is electric heater unit, heated by gas device, heated by natural gas device or microwave heating dress
Set heating.
The microwave heating equipment is belt microwave heating device, the electric heater unit, heated by gas device or natural
Gas heating device is rotary kiln.
The rotary kiln is belt kiln or pushed bat kiln.
The frequency of the microwave heating equipment is 915 ± 50 MHz, 2450 ± 50 MHz or 5800 ± 50 MHz.
The mixture that the mixing chamber 103 is sent out uniformly intersperses among the conveyer belt of heating decomposition apparatus 2 by distributing device
In upper or saggar, being then fed into heating chamber makes mixture be warming up to 80~400 DEG C and keeps the temperature 5~120min.
The mixing arrangement 1 is ball mill, screw mixer or pelletizer.
Embodiment one:
S100: taking urban solid garbage to burn converter fly ash 800g, tests and analyzes dioxin-like chemical content in flying dust, and sealing is protected
It deposits；The SODIUM PERCARBONATE of addition 2.2% into 800g flying dust, i.e. 17.6g are uniformly mixed using mortar, obtain mixture.
S200: by mixture spread out it is even be placed in micro-wave oven, heat 5mm under 915 ± 50 MHz, 600W power, take out and survey
It obtains treatment temperature and reaches 100 DEG C, the gaseous product generated is collected when obtaining the flying dust of low dioxin, while heating.
S300: gaseous product is discharged after alkali liquid washing absorption cleaning.
Dioxin is respectively 120ng/g and 25ng/g, dioxin after flying dust microwave treatment in flying dust before and after the processing
Removal efficiency reaches 79.17%, and the flue gas being discharged after washed absorption cleaning is mainly carbon dioxide and water through detection, two in flue gas
It dislikes English, heavy metal and dust content and is lower than emission limit.
Embodiment two:
S100: taking urban solid garbage to burn converter fly ash 800g, tests and analyzes dioxin-like chemical content in flying dust, and sealing is protected
It deposits；The hydrogen peroxide solution (concentration 3%) of addition 1% into 800g flying dust, i.e. 8g are uniformly mixed using mortar, obtain mixture.
S200: by mixture spread out it is even be placed in electric furnace, 60min is heated at 300 DEG C of setting processing temperature, to after setting time
It comes out and cools down to obtain the flying dust of low dioxin, while collecting the gaseous product of generation in heating process.
S300: gaseous product is discharged after alkali liquid washing absorption cleaning.
Dioxin is respectively 120ng/g and 15ng/g, dioxin after flying dust microwave treatment in flying dust before and after the processing
Removal efficiency reaches 87.50%, and the flue gas being discharged after washed absorption cleaning is mainly carbon dioxide and water through detection, two in flue gas
It dislikes English, heavy metal and dust content and is lower than emission limit.
Embodiment three:
S100: the copper ash 5Kg generated when taking regeneration copper weld pool, testing and analyzing dioxin-like chemical content in copper ash is 315ng/g,
And it is sealed；The hydrogen peroxide of potassium permanganate (i.e. the 50g) and 1% mass ratio of 1% mass ratio are added into 5Kg copper ash in iron basin
(concentration 3%) (i.e. 50g) adds water to be adjusted to humidity up to 20%, is stirred evenly with iron staff, obtain mixture.
S200: by mixture spread out it is even in iron basin and be put into micro-wave oven, in 5800 ± 50 MHz, microwave power 2.5KW
Lower heating 15min takes out iron basin after microwave treatment is complete, measures temperature of charge and reaches 400 DEG C, cooling obtains flying for low dioxin
Ash, while the gaseous product of generation is collected in heating process.
S300: gaseous product is discharged after NaOH alkali liquid washing absorption cleaning.
Dioxins concentration is 2ng/g in treated copper ash, and the removal efficiency of copper ash microwave treatment reaches 99.37%, through washing
The flue gas being discharged after absorption cleaning is washed through detecting, dioxin, heavy metal and dust content in flue gas are lower than emission limit.
Example IV:
S100: the copper ash 5Kg generated when taking regeneration copper weld pool, testing and analyzing dioxin-like chemical content in copper ash is 315ng/g,
And it is sealed；The dioxygen of ferrous sulfate (i.e. the 250g) and 1% mass ratio of 5% mass ratio are added into 5Kg copper ash in iron basin
Water (concentration 3%) (i.e. 50g), adds water to be adjusted to humidity up to 20%, is stirred evenly with iron staff, obtain mixture.
S200: by mixture spread out it is even be placed in iron basin and be put into electric furnace, in 400 DEG C of heat treatment 120min, to setting
It comes out of the stove after time and takes out iron basin, cooling obtains the flying dust of low dioxin, while collecting the gaseous product of generation in heating process.
S300: gaseous product is discharged after NaOH alkali liquid washing absorption cleaning.
Dioxins concentration is 18ng/g in treated copper ash, and the removal efficiency of copper ash microwave treatment reaches 94.28%, warp
For the flue gas being discharged after washing absorption purification through detecting, dioxin, heavy metal and dust content in flue gas are lower than emission limit.
Embodiment five:
S100: the copper ash 500Kg generated when taking regeneration copper weld pool, testing and analyzing dioxin-like chemical content in copper ash is 315ng/
G, and be sealed；Urea-hydrogen peroxide (i.e. 10Kg) and 3% of 2% mass ratio is slowly added into 500Kg copper ash in iron basin
The ferrous sulfate (i.e. 15Kg) of mass ratio, is added water to be adjusted to humidity up to 30%, is mixed using ball mill, obtain mixture.
S200: mixture is encased in long 300mm × wide 800mm mullite ceramic saggar in batches and spreads out even, formation
The material of 5cm is thick；Mixture is packed into the microwave pushed bat kiln of 15m long, 2450 ± 50 MHz, 120KW together with mullite ceramic saggar
In, making each saggar, residence time control is in 30min in microwave field, and microwave treatment maximum temperature is controlled at 400 DEG C, to setting
It comes out of the stove to take out to cool down after time and obtains the flying dust of low dioxin, while collecting the gaseous product of generation in heating process.
S300: gaseous product is discharged after NaOH alkali liquid washing absorption cleaning.
Dioxins concentration is 5~20ng/g in treated copper ash, the removal efficiency of copper ash microwave treatment reaches 93.65~
98.41%, the flue gas being discharged after washed absorption cleaning is through detecting, and the dioxin, heavy metal and dust content in flue gas are lower than row
Put limit value.
Embodiment six:
S100: the copper ash 800Kg generated when taking regeneration copper weld pool, testing and analyzing dioxin-like chemical content in copper ash is 315ng/
G, and be sealed；The potassium permanganate (i.e. 16Kg) and 2% mass of 2% mass ratio are slowly added into 800Kg copper ash in iron basin
The hydrogen peroxide (concentration 3%) (i.e. 16Kg) of ratio is added water to be adjusted to humidity up to 20%, is mixed and pelletized using disk pelletizing machine, obtain grain
The granulated mixture of 10~20mm of diameter.
S200: granulated mixture is uniformly interspersed among to the conveyer belt of the electric rotary kiln of 8m long 100KW by distributing device
On, the material for forming 10cm is thick, and control granulated mixture stops 90min in electric rotary kiln, and treatment temperature is controlled at 200 DEG C,
It comes out and cools down to obtain the flying dust of low dioxin, while collecting the gaseous product of generation in heating process.
S300: gaseous product is discharged after NaOH alkali liquid washing absorption cleaning.
Dioxins concentration is 6~22ng/g in treated copper ash, the removal efficiency of copper ash microwave treatment reaches 94.02~
97.64%, the flue gas being discharged after washed absorption cleaning is through detecting, and the dioxin, heavy metal and dust content in flue gas are lower than row
Put limit value.
Claims (10)
1. the Short flow method of dioxin in a kind of degradation flying dust, it is characterised in that including mixing, heating degradation, tail gas clean-up step
Suddenly, it specifically includes:
A, it mixes: flying dust being uniformly mixed with oxidant, obtains mixture；
B, heating degradation: mixture is heated, and is collected simultaneously the gaseous product of generation, and heating terminates to obtain flying for removing dioxin
Ash；
C, by the gaseous product washing absorption treatment and purification of step B, tail gas up to standard tail gas clean-up: is discharged after purification.
2. the Short flow method of dioxin in flying dust of degrading according to claim 1, it is characterised in that the oxidant is urine
One of element, thiocarbamide, hydrogen peroxide, potassium permanganate, percarbonic acid calcium, ferrous sulfate, sodium peroxide or any combination, the oxidation
The additive amount of agent is the 0.1~20% of flying dust weight.
3. the Short flow method of dioxin in flying dust of degrading according to claim 2, it is characterised in that in the mixing step,
Oxidant and water are first mixed into the mixed solution that concentration is 1~10%, then mixed solution, flying dust are added in proportion and added
Water mixing, obtains the mixture of humidity 5~30%；Or dry oxidant is directly added by the 0.5~20% of flying dust weight, so
After be uniformly mixed, obtain dry mixture；Or dry oxidant is directly added by the 0.5~20% of flying dust weight, then
It is mixed with water, obtains the mixture of humidity 5~30%.
4. the Short flow method of dioxin in flying dust of degrading according to claim 3, it is characterised in that the mixed solution flies
Ash adds in proportion and adds water or oxidant, flying dust to add in proportion and add water, is mixed and be granulated to obtain humidity 5~30%, grain
The granulate mixture of 2~50mm of diameter.
5. according to claim 1,2,3 or 4 it is described degradation flying dust in dioxin Short flow method, it is characterised in that the heating
It is the bed of material of 1~10cm thickness by mixture uniform distribution in degradation step, then through 80~400 DEG C of 5~120min of heat treatment,
It is collected simultaneously the gaseous product of generation, the flying dust of removing dioxin is obtained after degradation.
6. the Short flow method of dioxin in flying dust of degrading according to claim 5, it is characterised in that the mixture is through electricity
Heating device, heated by gas device, heated by natural gas device or microwave heating equipment heating, the frequency of the microwave heating equipment
For 915 ± 50 MHz, 2450 ± 50 MHz or 5800 ± 50 MHz.
7. the Short flow method of dioxin in flying dust of degrading according to claim 6, it is characterised in that the microwave heating dress
It is set to belt microwave heating device or electric heater unit, heated by gas device or heated by natural gas device is rotary kiln, mixing
Object is uniformly interspersed among on conveyer belt by distributing device and by heating chamber, and mixture is warming up to and 120~400 DEG C and keeps the temperature 5~
120min。
8. the Short flow method of dioxin in flying dust of degrading according to claim 6, it is characterised in that the microwave heating dress
It sets or electric heater unit is belt kiln device or pushed bat kiln device, mixture is dispersed evenly to ceramic saggar or gold by distributing device
Belong in saggar, mixture is warming up to 120~400 DEG C and keeps the temperature 5~120min.
9. the short route system of dioxin in a kind of degradation flying dust, it is characterised in that including mixing arrangement (1), heating decomposition apparatus
(2), tail gas collecting device (3), exhaust gas cleaner (4), the mixing arrangement (1) include flying dust supply storehouse (101), oxidant
Storehouse (102), mixing chamber (103) are supplied, flying dust supply storehouse (101) and/or oxidant supply storehouse (102) are set to mixing chamber
(103) top and the discharge port of in communication or flying dust supply storehouse (101) and/or oxidant supply storehouse (102) passes through defeated
Device and the feed inlet of mixing chamber (103) is sent to be connected to, the mixing chamber (103) is provided with rabbling mechanism and connects with driving device
It connects, the feeding port of the mixing chamber (103) is connect with the feeding inlet of heating decomposition apparatus (2), heating decomposition apparatus (2)
Discharge gate is discharged the flying dust of low dioxin, the heating decomposition apparatus (2) be include feeding inlet, discharge gate, be set to top
The air intake of the obturator of tail gas mouth, the tail gas collecting device (3) is connected to the tail gas mouth of heating decomposition apparatus (2), institute
The gas outlet for stating tail gas collecting device (3) is passed through exhaust gas cleaner (4), purified exhaust emissions.
10. the short route system of dioxin in flying dust of degrading according to claim 9, it is characterised in that the heating degradation dress
Setting (2) is that electric heater unit or microwave heating equipment heat, and the frequency of the microwave heating equipment is 915 ± 50 MHz, 2450
± 50 MHz or 5800 ± 50 MHz, the mixture that the mixing chamber (103) is sent out uniformly intersperse among heating by distributing device
On the conveyer belt of decomposition apparatus (2) or in saggar, be then fed into heating chamber make mixture be warming up to 80~400 DEG C and keep the temperature 5~
120min。
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Application publication date: 20191101 |