CN109985519A - Organic waste gas system and waste gas processing method are printed based on oxidative free radical processing - Google Patents
Organic waste gas system and waste gas processing method are printed based on oxidative free radical processing Download PDFInfo
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- CN109985519A CN109985519A CN201910260191.8A CN201910260191A CN109985519A CN 109985519 A CN109985519 A CN 109985519A CN 201910260191 A CN201910260191 A CN 201910260191A CN 109985519 A CN109985519 A CN 109985519A
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- 239000007789 gas Substances 0.000 title claims abstract description 78
- 230000001590 oxidative effect Effects 0.000 title claims abstract description 30
- 238000012545 processing Methods 0.000 title claims abstract description 28
- 150000003254 radicals Chemical class 0.000 title claims abstract description 25
- 239000010815 organic waste Substances 0.000 title claims abstract description 18
- 238000003672 processing method Methods 0.000 title abstract description 5
- 239000002912 waste gas Substances 0.000 title abstract description 5
- 230000003647 oxidation Effects 0.000 claims abstract description 72
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 72
- 230000003197 catalytic effect Effects 0.000 claims abstract description 65
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 44
- 239000001301 oxygen Substances 0.000 claims abstract description 44
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000007864 aqueous solution Substances 0.000 claims abstract description 40
- 239000012855 volatile organic compound Substances 0.000 claims abstract description 25
- 238000007639 printing Methods 0.000 claims abstract description 20
- 230000015556 catabolic process Effects 0.000 claims abstract description 6
- 238000006731 degradation reaction Methods 0.000 claims abstract description 6
- 239000000945 filler Substances 0.000 claims description 41
- 239000007921 spray Substances 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000003054 catalyst Substances 0.000 claims description 18
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000006227 byproduct Substances 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000003595 mist Substances 0.000 claims description 7
- 239000004927 clay Substances 0.000 claims description 6
- 239000007800 oxidant agent Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 5
- 239000005751 Copper oxide Substances 0.000 claims description 5
- 229910000428 cobalt oxide Inorganic materials 0.000 claims description 5
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims description 5
- 229910000431 copper oxide Inorganic materials 0.000 claims description 5
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000000593 degrading effect Effects 0.000 claims description 4
- 229910001882 dioxygen Inorganic materials 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- GJPYJADQEYXVSO-UHFFFAOYSA-N [O-2].[Ce+3].[Cu]=O.[O-2].[Fe+2].[O-2].[Mn+2] Chemical compound [O-2].[Ce+3].[Cu]=O.[O-2].[Fe+2].[O-2].[Mn+2] GJPYJADQEYXVSO-UHFFFAOYSA-N 0.000 claims description 3
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011224 oxide ceramic Substances 0.000 claims description 3
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 3
- 239000002957 persistent organic pollutant Substances 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 21
- 239000007788 liquid Substances 0.000 abstract description 10
- 239000003344 environmental pollutant Substances 0.000 abstract description 9
- 231100000719 pollutant Toxicity 0.000 abstract description 8
- 239000007787 solid Substances 0.000 abstract description 6
- 230000005284 excitation Effects 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 230000002045 lasting effect Effects 0.000 abstract description 4
- 239000000443 aerosol Substances 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 239000007791 liquid phase Substances 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 230000008929 regeneration Effects 0.000 abstract description 2
- 238000011069 regeneration method Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 12
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- -1 hydroxyl radical free radical Chemical class 0.000 description 6
- 239000012071 phase Substances 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 241000264877 Hippospongia communis Species 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000011949 solid catalyst Substances 0.000 description 3
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000011953 bioanalysis Methods 0.000 description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 150000005838 radical anions Chemical class 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses organic waste gas system and waste gas processing method is printed based on oxidative free radical processing, system is according to gas flow direction, including the level-one heterogeneous oxidation device, second level heterogeneous oxidation device, three-level heterogeneous oxidation device being sequentially communicated；The present invention utilizes VOCs pollutant in multisection type heterogeneous oxidation device processing printing organic exhaust gas, scale amplification easy to accomplish and integrated high-efficiency mineralising remove a variety of VOCs pollutants, plural serial stage design ensures that exhaust gas is greater than 2s in dwell time in the tower, the lasting injection of active oxygen species excites more liquid phase free radicals simultaneously, ensure gas-liquid reaction, liquid-liquid reactions, gas-solid reaction, gas-gas reaction, aerosol reaction is lasting to be carried out, strong degradation VOCs pollutant, the regeneration of aqueous solution quality recovery is realized again, form wet type heterogeneous catalytic oxidation-active oxygen species injection excitation heterogeneous catalytic oxidation-rewetting formula heterogeneous catalytic oxidation benign cycle.
Description
Technical field
The present invention relates to environmental protection technology and industrial waste gas Treatment process fields more particularly to a kind of oxidative free radical to handle
Print organic waste gas system and waste gas processing method.
Background technique
Printing organic exhaust gas refers to ink in printing process (containing colorant, resin, solvent, adjuvant etc.) due to inking, baking
The volatile organic matter that dry or other heating, convection process generate, with air quantity is big, concentration is low, peculiar smell is heavy, gas chromatography is mixed
The characteristics of conjunction.Solvent-based ink volatilization generates the organic matters such as benzene, dimethylbenzene, acetone, butanol or ethyl acetate, and water-based ink plays
Generate the organic matters such as ethyl alcohol, normal propyl alcohol, isopropanol, ethyl acetate or butyl acetate.Though it is low to print organic exhaust gas concentration, pollution
Object total emission volumn is more than environmental protection standard requirement, it is necessary to could qualified discharge by stringent processing.Currently, printing VOCs treatment
Technology mainly includes active carbon adsorption, flame combustion method, photocatalytic oxidation, bioanalysis etc., and single Treatment process exists
Different defects, the activated carbon adsorption replacement cycle is short, moisture resistance and high temperature (being lower than 120 DEG C of desorptions), generation be not a large amount of useless active
Charcoal；Flame combustion method equipment investment cost is high, and operation energy consumption is big, needs auxiliary fuel, generates NOx secondary pollution；Photochemical catalytic oxidation
Organic exhaust gas of the method to concentration greater than 0.03% cannot achieve stably reaching standard discharge；Bioanalysis equipment volume is huge and cannot achieve
Stably reaching standard discharge.To sum up, there are secondary pollutions or can not stably reaching standard for existing printing organic exhaust gas single treatment technology
Problem, for the purification problem of a variety of volatile organic contaminants in solution printing organic exhaust gas, it is still necessary to the printing for developing completely new is organic
Exhaust gas treatment technology and system.
Summary of the invention
The present invention is to solve the defect and deficiency of prior art processing, and it is organic to provide a kind of oxidative free radical processing printing
Waste gas system is the heterogeneous catalytic oxidation case that will be printed organic exhaust gas and introduce thtee-stage shiplock, is realized a variety of in printing organic exhaust gas
Thoroughly mineralising is inorganic matter to volatile organic matter under the effect of multisection type living radical.
To achieve the above object, the technical solution adopted by the present invention is that based on oxidative free radical processing printing organic exhaust gas
System, according to gas flow direction, level-one heterogeneous oxidation device, second level heterogeneous oxidation device, three-level including being sequentially communicated are more
Phase oxidation device；
The level-one heterogeneous oxidation device includes the first cabinet, the first catalytic filler layer, the first spray thrower, the first aqueous solution
Collecting tank；First spray thrower, the first catalytic filler layer are successively set on the inside of the first cabinet from top to bottom, and the first aqueous solution is received
Collect slot and the first spray thrower is connected to by water pipe；
The second level heterogeneous oxidation device includes including the second cabinet, second level heterogeneous oxidation Catalytic Layer, active oxygen species hair
Raw device；Second cabinet is connected to the outlet side of the first cabinet, and second level heterogeneous oxidation Catalytic Layer is arranged in the second box house；Activity
Oxygen electronic generator is connected to the second cabinet.
The three-level heterogeneous oxidation device includes the third cabinet being connected to the second cabinet outlet side, third catalytic filler
Layer, third spray thrower, third aqueous solution collecting tank；Third case is arranged in third spray thrower, third catalytic filler layer from top to bottom
The inside of body, third aqueous solution collecting tank are connected to third spray thrower.
The present invention utilizes VOCs pollutant in multisection type heterogeneous oxidation device processing printing organic exhaust gas, scale easy to accomplish
Amplification and integrated high-efficiency mineralising remove a variety of VOCs pollutants, and plural serial stage design ensures that exhaust gas is big in dwell time in the tower
In 2s, while the lasting injection of active oxygen species excites more liquid phase free radicals, it is ensured that gas-liquid reaction, liquid-liquid reactions,
Gas-solid reaction, gas-gas reaction, the lasting progress of aerosol reaction, strong VOCs pollutant of degrading, and realize aqueous solution quality recovery
Regeneration forms wet type heterogeneous catalytic oxidation-active oxygen species injection excitation heterogeneous catalytic oxidation-rewetting formula heterogeneous catalytic oxidation
Benign cycle.
Preferably, the level-one heterogeneous oxidation device further includes the first demisting layer, and the first demisting layer is arranged first
The inside of cabinet, and it is located at the top of the first spray thrower.
Preferably, the second level heterogeneous oxidation device further includes disperser, and the disperser is arranged in the second cabinet
Portion, and it is located at the top of second level heterogeneous oxidation Catalytic Layer, generator is connected to the disperser by stages with active oxygen.
Preferably, the three-level heterogeneous oxidation device further includes third demisting layer, and the third demisting layer is arranged in third
The inside of cabinet, and it is located at the top of third spray thrower.
Preferably, first cabinet is stainless steel or carbon steel in third cabinet, and inside is coated with the rotten anti-painting of epoxy resin
Layer.
Preferably, the first catalytic filler layer is made of catalyst, the catalyst by manganese oxide, cobalt oxide, iron powder,
Active carbon and clay uniformly mix and are sintered and are made after being pressed into oval figure；The first demisting layer and third demisting layer by
Plastics polyhedron empty ball filler composition.
Preferably, the third catalytic filler layer is made of catalyst, and catalyst is by manganese oxide, copper oxide, cobalt oxide, oxygen
Change cerium, iron powder, active carbon and clay uniformly to mix in proportion and be sintered and be made after being pressed into oval figure；Third demisting layer by
Plastics polyhedron empty ball filler composition.
Preferably, second Catalytic Layer is made of manganese oxide-iron oxide-copper oxide-cerium oxide ceramic honeycomb catalyst.
Preferably, the active oxygen species generator is made of dielectric impedance micro discharge pipe.
The present invention also provides a kind of processing method using the organic exhaust gas system processing printing organic exhaust gas, packets
Include following steps:
1) start active oxygen species generator, the aqueous solution in the first aqueous solution collecting tank enters the first spray by water pump
Device is injected in above the first catalytic filler layer；The active oxygen species oxidant that second active oxygen species generator generates passes through the
Two dispersers inject above the second Catalytic Layer；Third aqueous solution enters third spray thrower in third aqueous solution collecting tank, in diverging
It is misty to be uniformly injected in above third catalytic filler layer；
2) printing organic exhaust gas enters the first cabinet, and exhaust gas enters the first catalytic filler layer, anti-by heterogeneous catalytic oxidation
Answer, unreacted VOCs, degrade organic by-products exhaust gas through the first demisting layer remove water mist, from the first outlet side be discharged；
3) enter the second cabinet by level-one heterogeneous oxidation device treated exhaust gas, with the second active oxygen species generator
The active oxygen species of generation mix rapidly, and catalyzing oxidizing degrading, unreacted VOCs, degradation are completed in second level heterogeneous oxidation device
By-product, residual active oxygen molecular oxygen agent exhaust gas be discharged through outlet side；
3) entering third cabinet by second level heterogeneous oxidation device treated exhaust gas, exhaust gas is from third catalytic filler layer
Lower section enters third level catalytic filler layer, the remaining organic pollutant that strong fast decoupled exhaust gas carries, and depth mineralising is CO2With
H2O, exhaust gas are discharged after third demisting layer removes water mist from outlet side, realize cleaning discharge.
Beneficial effects of the present invention:
(1) catalytic oxidation principle is clear, and structure is simple, treatment process room temperature, normal pressure, appoints without dedusting, dehumidifying, concentration etc.
What pre-processing device, convenient operation and management；
(2) the extremely strong oxidisability of hydroxyl radical free radical, the degradable various VOCs of mineralising have broad spectrum activity；
(3) it is handled, is not produced by the printing VOCs that can be used for various concentration with adjusting that adds of active oxygen species oxidant
The pollution of the secondary airs such as raw NOx, makes it possible VOCs near-zero release.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the structural schematic diagram of the organic waste gas treatment system of comparative example 1；
Fig. 3 is the structural schematic diagram of the organic waste gas treatment system of comparative example 2.
In figure: 1, level-one heterogeneous oxidation device, 2, second level heterogeneous oxidation device, 3, three-level heterogeneous oxidation device, 11, first
Cabinet, the 12, first inlet end, the 13, first catalytic filler layer, the 14, first spray thrower, the 15, first demisting layer, 16, first is water-soluble
Liquid, the 17, first aqueous solution collecting tank, the 18, first water pump, the 19, first outlet side；21, the second cabinet, the 22, second inlet end,
23, disperser, the 24, second Catalytic Layer, 25, active oxygen species generator, the 26, second outlet side；31, third cabinet, 32, third
Inlet end, 33, third catalytic filler layer, 34, third spray thrower, 35, third demisting layer, 36, third aqueous solution, 37, third water
Solution collecting tank, 38, third water pump, 39, third outlet side.
Specific embodiment
The present invention is further described in detail with reference to the accompanying drawing, these attached drawings are simplified schematic diagram, only
The basic structure that the invention is illustrated in a schematic way, the direction of this specific implementation is using the direction Fig. 1 as standard.
Embodiment
Organic waste gas system is printed in a kind of oxidative free radical processing of the invention, according to gas flow direction, including according to
The secondary level-one heterogeneous oxidation device 1 being connected to by tracheae, second level heterogeneous oxidation device 2, three-level heterogeneous oxidation device 3；
Level-one heterogeneous oxidation device 1 includes the first cabinet 11, the first inlet end 12, the spray of the first catalytic filler layer 13, first
Drench device 14, the first demisting layer 15, the first aqueous solution collecting tank 17, the first water pump 18, the first outlet side 19；First cabinet, 11 shape
For cuboid, making material is carbon steel, and the rotten anti-coating treatment of epoxy resin is made in inside, and long 4000mm, wide 2000mm are high
3000mm；The side of the first cabinet 11 is arranged in first inlet end 12, it is preferable that the side of bottom end is arranged in；First demisting layer
15, the first spray thrower 14, the first catalytic filler layer 13 are fixed at the inside of the first cabinet 11 from top to bottom, and fixed form is adopted
It is realized with the prior art；First aqueous solution 16 is housed, the first aqueous solution collecting tank 17 is arranged in the first case inside first cabinet 11
The side of the bottom end of body 11, and the first aqueous solution collecting tank 17 is communicated with the inside of cabinet, and can be flowed into the first aqueous solution 16
To the first aqueous solution collecting tank 17；First aqueous solution collecting tank 17 is connected to the first water pump 18, the first spray thrower 14 by water pipe.Water
Solution, which is realized, to be recycled；The top of the first cabinet 11 is arranged in first outlet side 12.First catalytic filler layer 13 is by catalyst
Composition, catalyst by 0.05% manganese oxide, 0.01% cobalt oxide, 60% iron powder, 31.94% active carbon and 8% clay in proportion
Uniformly mixes and be sintered and be made after being pressed into ellipsoid (long axis 50mm, short axle 20mm) type.First demisting layer 15 is by diameter
The plastics polyhedron empty ball filler of 50mm forms.
Second level heterogeneous oxidation device 2 is urged including the second cabinet 21, the second inlet end 22, disperser 23, second level heterogeneous oxidation
Change layer 24, active oxygen species generator 25, the second outlet side 26；The top of the second cabinet 21 is arranged in second inlet end 22, and
Be connected with the first outlet side 19 by tracheae, disperser 23, second level heterogeneous oxidation Catalytic Layer 24 according to air current flow direction from
It is successively fixed under inside the second cabinet 21；Active oxygen species generator 25 is arranged outside the second cabinet 21, and
Disperser 23 is connected to by tracheae by the active oxygen species generator 25.The bottom of the second cabinet 21 is arranged in second outlet side 26
End.
Second level heterogeneous oxidation Catalytic Layer 24 is made of manganese oxide-iron oxide-copper oxide-cerium oxide ceramic honeycomb catalyst,
Honeycomb catalyst is using 100mm × 100mm × 40mm ceramic honey comb as carrier, using H-ZSM-5 molecular sieve to manganese oxide, oxidation
Iron, copper oxide, cerium oxide active component carry out structure regulating, are prepared by infusion process, manganese oxide, iron oxide, copper oxide, oxidation
Cerium load capacity (quality) is respectively 0.5%, 0.5%, 0.01%, 0.01%.Active oxygen species generator 25 is hindered by 20 media
Micro discharge pipe composition, general power 10kW are kept off, ionized air generates active oxygen species oxidant.
Three-level heterogeneous oxidation device 3 includes third cabinet 31, third inlet end 32, third catalytic filler layer 33, third spray
Drench device 34, third demisting layer 35, third aqueous solution collecting tank 37, third water pump 38, third outlet side 39；Wherein, third cabinet
31 shapes are cuboid, and making material is carbon steel, and the rotten anti-coating treatment of epoxy resin is made in inside, and long 4000mm, wide 2000mm are high
3000mm.The side of the bottom end of third cabinet 31 is arranged in third inlet end 32, and is connected to the second outlet side 26, third demisting
Layer 35, third spray thrower 34, third catalytic filler layer 33 are fixed at the inside of third cabinet 31, fixed form from top to bottom
It is realized using the prior art；Third aqueous solution 36 is housed, third aqueous solution collecting tank 37 is arranged in third inside third cabinet 31
The side of the bottom end of cabinet 31, and third aqueous solution collecting tank 37 is communicated with the inside of cabinet, and can be flowed with third aqueous solution 36
Enter to third aqueous solution collecting tank 37；Third aqueous solution collecting tank 37 is connected to third water pump 38, third spray thrower 34 by water pipe.
Aqueous solution, which is realized, to be recycled；The top of third cabinet 31 is arranged in third outlet side 39.
Third catalytic filler layer 33 is made of catalyst, and catalyst is by 1% manganese oxide, 0.01% copper oxide, 0.01% oxygen
Change cobalt, 0.01% cerium oxide, 65% iron powder, 33.97% active carbon and 8% clay uniformly to mix in proportion and be pressed into ellipsoid
It is sintered and is made after (long axis 60mm, short axle 30mm) type.Third demisting layer 35 by diameter 38mm plastics polyhedron empty ball filler
Composition.
The step of organic exhaust gas is printed in oxidative free radical system processing of the invention is as follows:
1) start the first water pump 18, the second active oxygen species generator 25, third level water pump 38；First aqueous solution collecting tank
The first aqueous solution 16 in 17 enters the first spray thrower 14 by the first water pump 18, is uniformly injected in the first catalysis in diverging is misty
13 top of packing layer, in packing area, liquid, gas, solid catalyst three-phase are come into full contact with, and are excited and are generated in heterogeneous oxidation case
Strong oxidizing property radical source (hydroxyl radical free radical OH, hydroperoxyl free radical HOO, ultra-oxygen anion free radical O2–)；Second activity
The active oxygen species oxidant that oxygen electronic generator 25 generates injects 24 top of the second Catalytic Layer by the second disperser 23, is urging
The area Hua Ceng gas, water mist, solid catalyst multiphase come into full contact with, and excitation generates strong oxidizing property hydroxyl in heterogeneous oxidation case Catalytic Layer
Base free radical OH；Third aqueous solution 36 enters third spray thrower 34 by third water pump 38 in third aqueous solution collecting tank 37, is in
Diverging is misty to be uniformly injected in 33 top of third catalytic filler layer, and in packing area, liquid, gas, solid catalyst three-phase are sufficiently connect
Touching, excitation generates strong oxidizing property radical source (hydroxyl radical free radical OH, hydroperoxyl free radical HOO, super oxygen in heterogeneous oxidation case
Radical anion O2–)。
2) printing organic exhaust gas enters the first cabinet 11 by the first inlet end 11, and exhaust gas is under the first catalytic filler layer 13
Side enter have adsorption capacity the first catalytic filler layer 13, in the firstth cabinet 11 complete gas-liquid reaction, gas-solid reaction,
Liquid-solid reaction, VOCs (benzene, dimethylbenzene, acetone, butanol, ethyl acetate, ethyl alcohol, positive third that strong fast decoupled exhaust gas carries
Alcohol, isopropanol) VOCs, is resolved into small molecule organic by-products, CO by pollutant2And H2O, fraction VOCs and undegraded product
It is absorbed by chemistry of aqueous solution, by multi-phase catalytic oxidation in level-one heterogeneous oxidation device 1, most of VOCs is oxidized degradation
And absorption, then, carry unreacted VOCs, organic by-products of degrading exhaust gas after the first demisting layer 15 removes water mist, from the
The discharge of one outlet side 19；
3) entered under the guidance of tracheae by the second inlet end 21 by treated the exhaust gas of level-one heterogeneous oxidation device 1
Second cabinet 21 mixes rapidly with the active oxygen species generated from the second active oxygen species generator 25, in second level multiphase oxygen
Makeup, which is set, completes two kinds of reaction formations in 2:
(1) the direct reaction of active oxidation molecule, i.e. VOCs pollutant+active oxidation molecule → CO2+H2O product or centre
Object；
(2) active oxidation molecule forms the indirect reaction of hydroxyl after the catalysis of the second Catalytic Layer, and oxidant is mutually catalyzed, is solid
Hydroxyl radical free radical is formed after phase catalyst catalysis and causes chain reaction, so that organic matter is thoroughly degraded, i.e. pollutant+OH → CO2+H2O。
By multi-phase catalytic oxidation in second level heterogeneous oxidation device, more VOCs are further oxidized degradation mine
Change, then, carry unreacted VOCs, degradation by-products, residual active oxygen molecular oxygen agent exhaust gas through 26 row of the second outlet side
Out；
3) entered under the guidance of tracheae by third inlet end 31 by treated the exhaust gas of second level heterogeneous oxidation device 2
Third cabinet 31, exhaust gas enter the third level catalytic filler layer 33 with adsorption capacity below third catalytic filler layer 33,
Under the synergistic effect of catalyst and residual active oxygen molecular oxygen agent, it is anti-that gas-gas is completed in third level heterogeneous oxidation device 3
It answers, the reaction of gas-liquid reaction, liquid-liquid reactions, gas-solid reaction, aerosol, the remaining organic contamination that strong fast decoupled exhaust gas carries
Object, depth mineralising are CO2And H2O, exhaust gas are discharged after third demisting layer 35 removes water mist from third outlet side 39, realize cleaning
Discharge.
Comparative example 1
As shown in Fig. 2, organic waste gas system is printed in the oxidative free radical processing of this comparative example, with difference of the invention
It is only that, has lacked second level heterogeneous oxidation device 2, the first outlet side is directly connected to third inlet end.
Comparative example 2
As shown in figure 3, organic waste gas system is printed in the oxidative free radical processing of this comparative example, with area of the invention
It is not only that, has lacked three-level heterogeneous oxidation device 3.
20000m3/ h ink printing organic exhaust gas passes through the present invention and comparative example 1,2 heterogeneous catalytic oxidation of comparative example respectively
Case processing, detects the amount of VOCs before and after the processing in its exhaust gas, and calculate removal rate, the results are shown in Table 1:
Table 1
| Group | VOCs removal rate |
| The present invention | 95% |
| Comparative example 1 | 70% |
| Comparative example 2 | 80% |
By upper table data it is found that the removal rate of VOCs is obviously than comparative example 1 after exhaust treatment system processing of the invention
It is good with comparative example 2.Exhaust treatment system of the invention meets environmental requirement, solve Wind Volume, low concentration printing it is organic
The intractable environment difficulties of exhaust gas.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (10)
1. printing organic waste gas system based on oxidative free radical processing, which is characterized in that according to gas flow direction, including according to
Level-one heterogeneous oxidation device, second level heterogeneous oxidation device, the three-level heterogeneous oxidation device of secondary connection；
The level-one heterogeneous oxidation device includes the first cabinet, the first catalytic filler layer, the first spray thrower, the collection of the first aqueous solution
Slot；First spray thrower, the first catalytic filler layer are successively set on the inside of the first cabinet, the first aqueous solution collecting tank from top to bottom
It is connected to the first spray thrower；
The second level heterogeneous oxidation device includes including the second cabinet, second level heterogeneous oxidation Catalytic Layer, active oxygen species generator；
Second cabinet is connected to the outlet side of the first cabinet, and second level heterogeneous oxidation Catalytic Layer is arranged in the second box house；Active oxygen
Electronic generator is connected to the second cabinet；
The three-level heterogeneous oxidation device includes the third cabinet being connected to the second cabinet outlet side, third catalytic filler layer,
Three spray throwers, third aqueous solution collecting tank；Third spray thrower, third catalytic filler layer are arranged in from top to bottom in third cabinet
Portion, third aqueous solution collecting tank are connected to third spray thrower.
2. according to claim 1 print organic waste gas system based on oxidative free radical processing, which is characterized in that described
Level-one heterogeneous oxidation device further includes the first demisting layer, and the inside of the first cabinet is arranged in the first demisting layer, and is located at the
The top of one spray thrower.
3. according to claim 1 print organic waste gas system based on oxidative free radical processing, which is characterized in that described
Second level heterogeneous oxidation device further includes disperser, and the inside of the second cabinet is arranged in the disperser, and is located at second level multiphase oxygen
Change the top of Catalytic Layer, generator is connected to the disperser by stages with active oxygen.
4. according to claim 1 print organic waste gas system based on oxidative free radical processing, which is characterized in that described
Three-level heterogeneous oxidation device further includes third demisting layer, and the inside of third cabinet is arranged in the third demisting layer, and is located at the
The top of three spray throwers.
5. according to claim 1 print organic waste gas system based on oxidative free radical processing, which is characterized in that described
The first cabinet and third cabinet be stainless steel or carbon steel, inside is coated with the rotten anti-coating of epoxy resin.
6. according to claim 1 print organic waste gas system based on oxidative free radical processing, which is characterized in that described
First catalytic filler layer is made of catalyst, and the catalyst is uniformly mixed by manganese oxide, cobalt oxide, iron powder, active carbon and clay
Merging is sintered and is made after being pressed into oval figure；The first demisting layer and third demisting layer are by plastics polyhedron empty ball filler
Composition.
7. according to claim 1 print organic waste gas system based on oxidative free radical processing, which is characterized in that described
Third catalytic filler layer is made of catalyst, catalyst by manganese oxide, copper oxide, cobalt oxide, cerium oxide, iron powder, active carbon and
Clay uniformly mixes in proportion and is sintered and is made after being pressed into oval figure；Third demisting layer is by plastics polyhedron empty ball filler
Composition.
8. according to claim 1 print organic waste gas system based on oxidative free radical processing, which is characterized in that described
Second Catalytic Layer is made of manganese oxide-iron oxide-copper oxide-cerium oxide ceramic honeycomb catalyst.
9. according to claim 1 print organic waste gas system based on oxidative free radical processing, which is characterized in that described
Active oxygen species generator be made of dielectric impedance micro discharge pipe.
10. a kind of processing side using according to any one of claims 1 to 99 described in any item organic exhaust gas system processing printing organic exhaust gas
Method, which comprises the following steps:
1) starting active oxygen species generator, the aqueous solution in the first aqueous solution collecting tank enters the first spray thrower by water pump,
It is injected in above the first catalytic filler layer；The active oxygen species oxidant that second active oxygen species generator generates passes through second point
Device is dissipated to inject above the second Catalytic Layer；Third aqueous solution enters third spray thrower in third aqueous solution collecting tank, misty in diverging
It is uniformly injected in above third catalytic filler layer；
2) printing organic exhaust gas enters the first cabinet, and exhaust gas enters the first catalytic filler layer, by multi-phase catalytic oxidation, not
React VOCs, degrade organic by-products exhaust gas through the first demisting layer remove water mist, from the first outlet side be discharged；
3) enter the second cabinet by level-one heterogeneous oxidation device treated exhaust gas, generated with the second active oxygen species generator
Active oxygen species mix rapidly, complete catalyzing oxidizing degrading in second level heterogeneous oxidation device, unreacted VOCs, degradation by-product
Object, residual active oxygen molecular oxygen agent exhaust gas be discharged through outlet side；
3) entering third cabinet by second level heterogeneous oxidation device treated exhaust gas, exhaust gas is below third catalytic filler layer
Into third level catalytic filler layer, the remaining organic pollutant that strong fast decoupled exhaust gas carries, depth mineralising is CO2And H2O,
Exhaust gas is discharged after third demisting layer removes water mist from outlet side, realizes cleaning discharge.
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| CN112915739A (en) * | 2021-01-25 | 2021-06-08 | 中山大学 | Heterogeneous catalytic oxidation processing system of organic waste gas and foul smell waste gas |
| CN112915743A (en) * | 2021-01-25 | 2021-06-08 | 中山大学 | Organic waste gas heterogeneous catalytic oxidation processing system |
| CN116585847A (en) * | 2023-05-30 | 2023-08-15 | 生态环境部南京环境科学研究所 | VOCs deep treatment method in pesticide manufacturing industry |
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Application publication date: 20190709 |