CN203803373U - Exhaust purification system for volatile organic pollutants of soil vapor extraction (SVE) - Google Patents
Exhaust purification system for volatile organic pollutants of soil vapor extraction (SVE) Download PDFInfo
- Publication number
- CN203803373U CN203803373U CN201320892640.9U CN201320892640U CN203803373U CN 203803373 U CN203803373 U CN 203803373U CN 201320892640 U CN201320892640 U CN 201320892640U CN 203803373 U CN203803373 U CN 203803373U
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- CN
- China
- Prior art keywords
- purification system
- volatile organic
- exhaust gas
- immobilized
- gas purification
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- 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.)
- Expired - Lifetime
Links
- 238000000746 purification Methods 0.000 title claims abstract description 29
- 239000002689 soil Substances 0.000 title claims abstract description 24
- 238000000605 extraction Methods 0.000 title claims abstract description 21
- 239000002957 persistent organic pollutant Substances 0.000 title abstract description 3
- 239000011941 photocatalyst Substances 0.000 claims abstract description 31
- 230000001699 photocatalysis Effects 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 30
- 229910052799 carbon Inorganic materials 0.000 claims description 30
- 238000007146 photocatalysis Methods 0.000 claims description 17
- 239000000356 contaminant Substances 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 13
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- DQMUQFUTDWISTM-UHFFFAOYSA-N O.[O-2].[Fe+2].[Fe+2].[O-2] Chemical compound O.[O-2].[Fe+2].[Fe+2].[O-2] DQMUQFUTDWISTM-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- CMPGARWFYBADJI-UHFFFAOYSA-L tungstic acid Chemical compound O[W](O)(=O)=O CMPGARWFYBADJI-UHFFFAOYSA-L 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims 1
- 239000011787 zinc oxide Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 238000006555 catalytic reaction Methods 0.000 abstract description 3
- 238000013033 photocatalytic degradation reaction Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 10
- 230000003197 catalytic effect Effects 0.000 description 7
- 239000005416 organic matter Substances 0.000 description 5
- 241001075561 Fioria Species 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000011953 bioanalysis Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000013067 intermediate product Substances 0.000 description 3
- 229910006404 SnO 2 Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000000640 hydroxylating effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000003519 ventilatory effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
The utility model provides an exhaust purification system for volatile organic pollutants of soil vapor extraction (SVE). The exhaust purification system comprises a vacuum pump, an immobilized photocatalytic pretreatment reactor and a biochar purifier, wherein the vacuum pump is connected with the immobilized photocatalytic pretreatment reactor which is connected with the biochar purifier; the immobilized photocatalytic pretreatment reactor is a sealed container, and the base layer of the immobilized photocatalytic pretreatment reactor is fully coated with photocatalyst materials; ultraviolet modulator tubes are arranged in the immobilized photocatalytic pretreatment reactor. As gas-liquid separation, photocatalyst catalysis pretreatment and biochar adsorption purification are adopted in a mutual combination manner, the exhaust purification system can efficiently purify and eliminate volatile organic matters, and can overcome the defects that the effect of single biological adsorption material is poor in the prior art; moreover, as photocatalyst is immobilized on the fan blades of a propeller agitator and the inner wall of a light-catalyzed reactor, when gas is efficiently stirred, the exhaust is in contact with the photocatalyst coatings fully, and the rate of photocatalytic degradation is improved.
Description
Technical field
The invention relates to soil vapor extraction volatile organic contaminant and administers field, particularly a kind of soil vapor extraction volatile organic contaminant exhaust gas purification system.
Background technology
Soil pollution problem is subject to people's attention day by day, the reparation of the contaminated site environment difficult problem that become international.Soil vapor extraction technology is an important pollution remediation technology, has been widely used in the reparation of contaminated site.Soil vapor extraction technology (SVE) is a kind of original position soil recovery technique of utilizing physical method to remove volatile organic constituents in soil, utilize vacuum equipment to force fresh air by contaminated soil hole, thereby make air stream carry VOC secretly to extraction system, extracting is collected and is processed behind ground.When the extensive use of soil vapor extraction technology, corresponding tail gas clean-up technology is but relatively single.Tail gas clean-up is commonly used bioanalysis, absorption method, and the technique that bioanalysis is processed VOCs waste gas has three kinds of biological washing method, biofiltration process and biomembrane filled tower methods.Wherein biomembrane filled tower method be applicable to process large-minded, load is higher, be difficult for stopping up, can easily the toxic products producing in metabolic process be discharged to the features such as treatment system.But in the environment of bioanalysis due to the certain humidity of microorganism living necessities, therefore higher to organic matter degradation efficiency soluble in water, and water-fast organic matter removal efficiency is reduced relatively, difficulty is relatively large.
Summary of the invention
The problem that the invention will solve is to provide a kind of soil vapor extraction volatile organic contaminant exhaust gas purification system, can fully solve above-mentioned mentioned problem.
For solving the problems of the technologies described above, the technical scheme that the invention adopts is: a kind of soil vapor extraction volatile organic contaminant exhaust gas purification system, it is characterized in that: described exhaust gas purification system comprises vavuum pump, immobilized photocatalysis pretreatment reaction device and biological carbon clarifier, described vavuum pump is connected with immobilized photocatalysis pretreatment reaction device, and described immobilized photocatalysis pretreatment reaction device is connected with biological carbon clarifier;
Described immobilized photocatalysis pretreatment reaction device is closed container, is covered with photocatalyst material on basalis, places ultraviolet lamp tube in immobilized photocatalysis pretreatment reaction device.
Further, described exhaust gas purification system also comprises gas-liquid separator, before described gas-liquid separator is placed in vavuum pump.
Further, described photocatalyst material can be titanium dioxide (TiO
2), tin ash (SnO
2), zinc oxide (ZnO), tungstic acid (WO
3), di-iron trioxide (Fe
2o
3) one or more.
Further, described ultraviolet lamp tube is the ultraviolet ultraviolet lamp tube that can generate wave band between 185nm-172nm.
Further, described immobilized photocatalysis pretreatment reaction device is built-in with propeller mixer.
Further, described propeller mixer is flaabellum shape.
Further, on described propeller mixer, scribble photocatalyst coating.
Further, described biological carbon clarifier is tower structure, be divided into two-layer up and down, every layer with lightweight spherical biological carbon fill, void ratio is 2:1.
Further, described exhaust gas purification system comprises multiple biological carbon clarifiers, and multiple biological carbon clarifiers connect with series system.
Advantage and good effect that the invention has are: the present invention adopts gas-liquid separation, photocatalyst catalytic pretreatment to combine with biological carbon adsorption cleaning, multistep high-efficient purification is also eliminated volatile organic matter, has overcome the poor shortcoming of traditional single creature sorbing material effect.Adopt in addition that photocatalyst is immobilized effectively stirs gas revolving fan leaf and the photo catalysis reactor inner walls of paddle stirrer, make tail gas fully contact, collide with photocatalyst coating, increase photocatalytic degradation probability.
Brief description of the drawings
Fig. 1 is cleaning system structural representation in example of the present invention;
Fig. 2 is example light catalyst catalytic pretreatment structure of reactor schematic diagram of the present invention;
Fig. 3 is example biological carbon purification reactor structural representation of the present invention.
In figure:
1, gas-liquid separator 2, vavuum pump 3, photocatalyst catalysis are located in advance
Reason reactor
4, biological carbon purifying column 5, lightweight spherical biological carbon 6, air duct
7, dividing plate 3-2, photocatalyst layer 3-3, ultraviolet lamp tube
3-4, fan leaf 3-5, propeller mixer
Detailed description of the invention
For to the more deep understanding of the invention, enumerate a specific embodiment below, and by reference to the accompanying drawings, the invention is described in further detail.
Referring to Fig. 1, a kind of soil vapor extraction volatile organic contaminant exhaust gas purification system and device, its composition comprises: its composition comprises it being gas-liquid separator 1, vavuum pump 2,3 and 2 grades of biological carbon purifying columns 4 of immobilized photocatalysis pretreatment reaction device.
Fig. 2 is photocatalyst catalytic pretreatment structure of reactor schematic diagram in example of the present invention, immobilized photocatalyst catalytic reactor is a closure casing, ultraviolet source and propeller mixer 3-5 are installed in housing, ultraviolet light source that this ultraviolet source uses is the ultraviolet ray of wave band between 185nm-172nm, and ultraviolet source by the even horizontal setting of multiple ultraviolet lamp tubes in photo catalysis reactor, make it to be set in parallel with upper and lower photocatalyst layer 3-, between ultraviolet source and photocatalyst layer, distance is 150mm-200mm.The fan leaf that scribbles photocatalyst layer of propeller mixer fully contacts, collides with organic pollution in reactor while rotation.
Fig. 3 is example biological carbon purification reactor structural representation of the present invention, biological carbon clarifier is tower structure, is divided into two-layerly up and down, fills for every layer with lightweight spherical biological carbon 5, biological carbon is clipped between two-layer dividing plate 7, between two biological carbon purification reactors, is connected by air duct 6.
Immobilized photocatalyst catalytic reactor photocatalyst layer material can be titanium dioxide (TiO
2), tin ash (SnO
2), zinc oxide (ZnO), tungstic acid (WO
3), di-iron trioxide (Fe
2o
3) etc. photocatalyst material.In order to ensure the long-term stability using of photo catalysis reactor, just the photocatalyst material in reactor need to be fixed.But the process of photocatalyst catalyze and degrade organic pollutants is the surface that occurs in photocatalyst material, so in fixed light catalyst material, make again it have enough large surface, therefore photocatalyst material by soaking, the mode such as coating, sintering is attached on reactor wall basalis and agitator fan leaf.
Below in conjunction with the course of work of application example of the present invention, the invention will be further elaborated, volatile organic matter tail gas extracting by soil SVE extracting enters gas-liquid separator, after gas-liquid separator, connect vavuum pump, tail gas enters into immobilized photocatalyst catalytic pretreatment reactor from vavuum pump 2 outputs, tail gas is in photocatalyst catalytic pretreatment reactor, utilize the photocatalysis row of photocatalyst layer material under ultra violet lamp, oxidation-adsorption is at the volatile organic matter tail gas of catalyst surface, generation chain type is decomposed, by complicated phenyl ring hydroxylating, make phenyl ring cracking, produce intermediate product.Intermediate product after the degraded of photocatalyst catalytic reaction enters biological carbon purifying column again, biological carbon purifying column is 2 layers of structure, fill with lightweight spherical biological carbon for every layer, by a small amount of steam of active bio carbon absorption intermediate product and generation, for strengthening ventilatory effect, prevent that air from cannot flow in biological carbon purifying column, lightweight spherical biological carbon filling pore is than being 2:1, through biological carbon purifying column process after, by tower top discharged to atmosphere.The quantity of biological tower can be selected according to tail gas amount and the treatment effect processed, and the mode that has adopted in this example two biological carbon to connect is processed tail gas.
Above the embodiment of the invention is had been described in detail, but described content is only for the preferred embodiment of the invention, can not be considered to for limiting practical range of the present invention.All equalization variation and improvement etc. of doing according to the invention scope, within all should still belonging to this patent covering scope.
Claims (9)
1. a soil vapor extraction volatile organic contaminant exhaust gas purification system, it is characterized in that: described exhaust gas purification system comprises vavuum pump, immobilized photocatalysis pretreatment reaction device and biological carbon clarifier, described vavuum pump is connected with immobilized photocatalysis pretreatment reaction device, and described immobilized photocatalysis pretreatment reaction device is connected with biological carbon clarifier;
Described immobilized photocatalysis pretreatment reaction device is closed container, is covered with photocatalyst material on basalis, places ultraviolet lamp tube in immobilized photocatalysis pretreatment reaction device.
2. soil vapor extraction volatile organic contaminant exhaust gas purification system according to claim 1, is characterized in that: described exhaust gas purification system also comprises gas-liquid separator, before described gas-liquid separator is placed in vavuum pump.
3. soil vapor extraction volatile organic contaminant exhaust gas purification system according to claim 1, is characterized in that: described photocatalyst material can be one or more of titanium dioxide, tin ash, zinc oxide, tungstic acid, di-iron trioxide.
4. soil vapor extraction volatile organic contaminant exhaust gas purification system according to claim 1, is characterized in that: described ultraviolet lamp tube is the ultraviolet ultraviolet lamp tube that can generate wave band between 185nm-172nm.
5. soil vapor extraction volatile organic contaminant exhaust gas purification system according to claim 1, is characterized in that: described immobilized photocatalysis pretreatment reaction device is built-in with propeller mixer.
6. soil vapor extraction volatile organic contaminant exhaust gas purification system according to claim 5, is characterized in that: described propeller mixer is flaabellum shape.
7. soil vapor extraction volatile organic contaminant exhaust gas purification system according to claim 5, is characterized in that: on described propeller mixer, scribble photocatalyst coating.
8. soil vapor extraction volatile organic contaminant exhaust gas purification system according to claim 1, is characterized in that: described biological carbon clarifier is tower structure, be divided into two-layer up and down, every layer with lightweight spherical biological carbon fill, void ratio is 2:1.
9. soil vapor extraction volatile organic contaminant exhaust gas purification system according to claim 1, is characterized in that: described exhaust gas purification system comprises multiple biological carbon clarifiers, multiple biological carbon clarifiers connect with series system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320892640.9U CN203803373U (en) | 2013-12-25 | 2013-12-25 | Exhaust purification system for volatile organic pollutants of soil vapor extraction (SVE) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320892640.9U CN203803373U (en) | 2013-12-25 | 2013-12-25 | Exhaust purification system for volatile organic pollutants of soil vapor extraction (SVE) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203803373U true CN203803373U (en) | 2014-09-03 |
Family
ID=51442185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320892640.9U Expired - Lifetime CN203803373U (en) | 2013-12-25 | 2013-12-25 | Exhaust purification system for volatile organic pollutants of soil vapor extraction (SVE) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203803373U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160257585A1 (en) * | 2013-06-28 | 2016-09-08 | Showa Co., Ltd. | Method for treating soil-contaminating water using photocatalytic material |
-
2013
- 2013-12-25 CN CN201320892640.9U patent/CN203803373U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160257585A1 (en) * | 2013-06-28 | 2016-09-08 | Showa Co., Ltd. | Method for treating soil-contaminating water using photocatalytic material |
| US9822025B2 (en) * | 2013-06-28 | 2017-11-21 | Showa Co., Ltd. | Method for treating soil-contaminating water using photocatalytic material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |