CN113304580A - VOCs gas adsorption equipment based on persimmon tannin - Google Patents
VOCs gas adsorption equipment based on persimmon tannin Download PDFInfo
- Publication number
- CN113304580A CN113304580A CN202110592872.1A CN202110592872A CN113304580A CN 113304580 A CN113304580 A CN 113304580A CN 202110592872 A CN202110592872 A CN 202110592872A CN 113304580 A CN113304580 A CN 113304580A
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- CN
- China
- Prior art keywords
- adsorption
- persimmon tannin
- vocs
- vocs gas
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 113
- 235000011511 Diospyros Nutrition 0.000 title claims abstract description 43
- 244000236655 Diospyros kaki Species 0.000 title claims abstract description 41
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 38
- 235000018553 tannin Nutrition 0.000 title claims abstract description 36
- 239000001648 tannin Substances 0.000 title claims abstract description 36
- 229920001864 tannin Polymers 0.000 title claims abstract description 36
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 239000004745 nonwoven fabric Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 44
- 230000000694 effects Effects 0.000 abstract description 9
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 238000003795 desorption Methods 0.000 abstract description 4
- 239000002250 absorbent Substances 0.000 abstract description 2
- 230000002745 absorbent Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 27
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 239000003463 adsorbent Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 238000005411 Van der Waals force Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 241000723267 Diospyros Species 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- -1 formaldehyde, aromatic hydrocarbon Chemical class 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 235000013824 polyphenols Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
Images
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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- 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
-
- 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
Abstract
The invention relates to a persimmon tannin-based VOCs gas adsorption device, which comprises a rack, wherein the rack is provided with a gas inlet and a gas outlet, the gas inlet is positioned at the top of the rack, and the gas outlet is positioned in the middle of the rack; the air inlet is provided with a circulating fan for sucking unfiltered air, an adsorption component is arranged below the circulating fan, and the adsorption component comprises a filtering substrate positioned above the air outlet and persimmon tannin coated on the surface of the filtering substrate; an electric control cabinet is also arranged below the exhaust port; through combining together traditional VOCs gas adsorption equipment and persimmon tannin adsorption component, when the air sees through persimmon tannin adsorption component, VOCs is gaseous to combine with the persimmon tannin that filters in the basement, has realized the gaseous effect of VOCs in the circulation desorption air, and adsorption effect and adsorption rate are all better than the active carbon in addition, are difficult for breaking away from by absorbent VOCs gas, can not produce secondary pollution.
Description
Technical Field
The invention relates to the field of gas adsorption devices, in particular to a VOCs gas adsorption device based on persimmon tannin.
Background
The gaseous getting rid of to indoor VOCs mainly uses adsorption equipment to administer at present, and wherein VOCs gaseous adsorption equipment most widely used's adsorption component is active carbon, and its absorption principle is the super strong adsorptive structure of carbon atom composition of the interior external surface distribution of active carbon. The activated carbon has the advantages of high adsorption speed, large adsorption capacity, large surface area, rich micropores and the like, and plays a great role in the treatment process of VOCs. However, activated carbon adsorbents also have certain disadvantages: the adsorption is physical surface adsorption, and the desorption phenomenon can be easily generated after the adsorption of the VOCs gas, so that the secondary pollution is caused. Therefore, it is urgently needed to develop an adsorption device with stable adsorption effect.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a persimmon tannin-based VOCs gas adsorption device which is stable in adsorption effect and not easy to generate secondary pollution.
In order to achieve the purpose, the invention adopts the technical scheme that:
a VOCs gas adsorption device based on persimmon tannin comprises a rack, wherein the rack is provided with an air inlet and an air outlet, the air inlet is positioned at the top of the rack, and the air outlet is positioned in the middle of the rack; the air inlet is provided with a circulating fan for sucking unfiltered air, an adsorption component is arranged below the circulating fan, and the adsorption component comprises a filtering substrate positioned above the air outlet and persimmon tannin coated on the surface of the filtering substrate; an electric control cabinet is also arranged below the exhaust port.
Through combining together traditional VOCs gas adsorption equipment and persimmon tannin adsorption component, when the air sees through persimmon tannin adsorption component, VOCs is gaseous to combine with the persimmon tannin that filters in the basement, has realized the gaseous effect of VOCs in the circulation desorption air, and adsorption effect and adsorption rate are all better than the active carbon in addition, are difficult for breaking away from by absorbent VOCs gas, can not produce secondary pollution.
In a further technical scheme, an electric control module and a power supply module which are electrically connected with each other are arranged in the electric control cabinet, and the electric control module is electrically connected with the circulating fan.
In a further technical scheme, the electronic control module comprises an electronic control module and a detection module for detecting VOCs gas in the air.
In a further technical scheme, the power module comprises a plurality of battery monomers which are arranged in parallel.
In a further technical scheme, the exhaust port is formed in the side wall of the rack.
In a further technical scheme, the filtering substrate is porous filter paper or non-woven fabric.
In a further technical scheme, the device further comprises a frame, wherein the adsorption component is arranged in the frame, and the frame is detachably connected with the rack.
Compared with the commercially available activated carbon, the modified persimmon tannin component has the advantages that the adsorption capacity and the adsorption speed are far higher than those of the activated carbon; meanwhile, the adsorption effect is stable, and secondary pollution cannot be generated.
Compared with the prior art, the invention has the beneficial effects that: the adsorption device provided by the invention adopts the persimmon tannin adsorption component, compared with the traditional activated carbon adsorption method, the activated carbon adsorption method is based on Van der Waals force and belongs to physical adsorption, although the principle of the invention is also physical adsorption, the adsorption acting force is based on hydrogen bonds, and the adsorption speed and the adsorption capacity of formaldehyde, ammonia gas and aromatic hydrocarbon volatile gas are far higher than those of activated carbon adsorption; and the adsorption effect is stable, and secondary pollution is not easy to generate.
Drawings
FIG. 1 is a comparison of formaldehyde adsorption performance of the present invention and an activated carbon adsorption unit;
FIG. 2 is a comparison of ammonia adsorption performance of the present invention and an activated carbon adsorption unit;
FIG. 3 is a comparison of toluene adsorption performance of the present invention and an activated carbon adsorption unit;
fig. 4 is a schematic view of the overall structure of the present invention.
Detailed Description
The following are merely preferred embodiments of the present invention, and do not limit the scope of the present invention.
The VOCs gas adsorption device on the market at present adopts active carbon as an adsorbent, and utilizes the active carbon as the adsorbent, firstly, because the source is simple, the cost is lower; and secondly, the specific surface area of the activated carbon is large enough, and the number of adsorption sites is large, so that VOCs gas molecules in the air can be effectively adsorbed. However, the combination of the VOCs gas molecules and the activated carbon does not generate chemical reaction, belongs to physical adsorption and is adsorption caused by intermolecular suction, so that the combination force is weaker, the adsorption heat is smaller, and the adsorption and desorption speeds are higher. I.e., physical adsorption, is reversible to some extent, so that the adsorbed species are also readily desorbed. This has certain limitations on the removal of VOCs gases from the chamber.
In order to solve the defects in the prior art, as shown in fig. 4, the invention discloses a persimmon tannin-based Volatile Organic Compounds (VOCs) gas adsorption device, which comprises a frame 1, wherein the frame 1 is provided with a gas inlet 11 and a gas outlet 12, the gas inlet 11 is positioned at the top of the frame 1, and the gas outlet 12 is positioned on the side wall of the middle part of the frame 1; the circulating fan 2 used for sucking unfiltered gas is installed at the air inlet 11, the adsorption component 3 is arranged below the circulating fan 2, and the adsorption component 3 comprises a filtering substrate positioned above the air outlet 12 and persimmon tannin coated on the surface of the filtering substrate.
When the adsorption device is in operation, unfiltered air is sucked into the frame 1 of the adsorption device under the action of the circulating fan 2 at the air inlet 11, and can be exhausted from the air outlet 12 after penetrating through the adsorption component 3. When the persimmon tannin permeates the adsorption component 3, the persimmon tannin on the filtering substrate has abundant phenolic hydroxyl groups, is easy to have reactions such as chelation, hydrogen bond association and the like, and has strong affinity to a plurality of substances. O, N on electron-rich radical gases such as formaldehyde and ammonia can provide lone-pair electrons, and large pi bonds exist on aromatic hydrocarbon, and the electrons can form hydrogen bonds with H atoms on phenolic hydroxyl groups. The binding energy of hydrogen bonds is mostly between 25-40kJ/mol, while the binding energy of van der Waals forces is 2-5 kJ/mol. The adsorption performance and binding energy increase exponentially with a natural constant, so that the adsorption effect based on hydrogen bonds as an acting force is much greater than that of physical adsorption based on van der waals forces. By utilizing the characteristics, the adsorption component 3 containing persimmon tannin can effectively adsorb the electron-rich base gases such as formaldehyde, aromatic hydrocarbon volatile matters, ammonia gas and the like.
An electric control cabinet 4 is further arranged below the exhaust port 12, an electric control module 41 and a power supply module 42 which are electrically connected with each other are arranged in the electric control cabinet 4, and the electric control module 41 is electrically connected with the circulating fan 2; the electronic control module 41 comprises an electronic control module and a detection module for detecting VOCs gas in the air; the power module 42 includes a plurality of battery cells arranged in parallel.
The adsorbent module 3 is prepared by two methods:
The method 2 comprises the following steps: taking persimmon as an example, the process of making the gas adsorbent is described. Crushing persimmons, chemically treating crushed persimmons by adopting acid or alkali, centrifugally separating and collecting persimmon residues, drying the persimmon residues, coating the dried persimmon residues by using porous materials such as gauze, non-woven fabrics or porous filter paper and the like, and making the persimmon residues into an adsorption component 3 by adding a frame for adsorbing VOCs gas.
Respectively carrying out VOCs adsorption test experiments on adsorption devices adopting the persimmon tannin adsorption component 3 and the activated carbon adsorption component 3, wherein as shown in figure 1, when formaldehyde is adsorbed, the adsorption device adopting the activated carbon adsorption component 3 is adopted, the saturated adsorption amount is reached within about 28 hours, and the adsorption saturation is lower than 50 mg/g; in contrast, the persimmon tannin adsorption component 3 reaches saturation within about 192 hours, and the adsorption saturation is as high as 640 mg/g; therefore, the invention has absolute advantages in the aspects of the adsorption duration and the adsorption saturation of formaldehyde.
As shown in fig. 2, when ammonia gas is adsorbed, the activated carbon adsorption module 3 is close to saturation at 60 hours, but the adsorption speed is slow, and the saturation is lower than 50 mg/g; the persimmon tannin adsorption component 3 is close to saturation at 48h, the adsorption speed is high, and the adsorption saturation is about 400 mg/g.
As shown in fig. 3, when the adsorption experiment is performed on toluene, the activated carbon adsorption module 3 is nearly saturated at 36h, and the adsorption saturation is about 25 mg/g; the persimmon tannin adsorption component 3 reaches a saturated state at about 18h, the adsorption saturation is 130mg/g, and the adsorption speed and the adsorption quantity are higher than those of the activated carbon adsorption component 3.
In conclusion, the adsorption device of the invention has higher adsorption efficiency than the activated carbon adsorption device in adsorbing the VOCs gas, and has the characteristics of higher adsorption capacity than the activated carbon adsorption component 3 in adsorbing the VOCs gas, simple overall operation, low use cost, small size and convenience, and easy popularization to the market.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (7)
1. The utility model provides a VOCs gaseous adsorption equipment based on persimmon tannin which characterized in that: the air inlet is positioned at the top of the rack, and the air outlet is positioned in the middle of the rack; the air inlet is provided with a circulating fan for sucking unfiltered air, an adsorption component is arranged below the circulating fan, and the adsorption component comprises a filtering substrate positioned above the air outlet and persimmon tannin coated on the surface of the filtering substrate; an electric control cabinet is also arranged below the exhaust port.
2. The persimmon tannin-based VOCs gas adsorption device of claim 1, wherein: an electric control module and a power supply module which are electrically connected with each other are arranged in the electric control cabinet, and the electric control module is electrically connected with the circulating fan.
3. The persimmon tannin-based VOCs gas adsorption device of claim 2, wherein: the electronic control module comprises an electronic control module and a detection module for detecting VOCs gas in the air.
4. The persimmon tannin-based VOCs gas adsorption device of claim 3, wherein: the power module comprises a plurality of battery monomers which are arranged in parallel.
5. The persimmon tannin-based VOCs gas adsorption device of claim 1, wherein: the exhaust port is formed in the side wall of the rack.
6. The persimmon tannin-based VOCs gas adsorption device according to any one of claims 1 to 5, wherein: the filtering substrate is porous filter paper or non-woven fabric.
7. The persimmon tannin-based VOCs gas adsorption device of claim 6, wherein: still include the frame, the adsorption component installation with in the frame, the frame with the frame can be dismantled and be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110592872.1A CN113304580A (en) | 2021-05-28 | 2021-05-28 | VOCs gas adsorption equipment based on persimmon tannin |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110592872.1A CN113304580A (en) | 2021-05-28 | 2021-05-28 | VOCs gas adsorption equipment based on persimmon tannin |
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|---|---|
| CN113304580A true CN113304580A (en) | 2021-08-27 |
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| CN202110592872.1A Pending CN113304580A (en) | 2021-05-28 | 2021-05-28 | VOCs gas adsorption equipment based on persimmon tannin |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001070419A (en) * | 1999-09-09 | 2001-03-21 | Mitsubishi Paper Mills Ltd | Air purifying method |
| CN102580688A (en) * | 2012-02-24 | 2012-07-18 | 桂林电子科技大学 | Adsorbing material for removing indoor formaldehyde gas |
| CN104525143A (en) * | 2014-12-25 | 2015-04-22 | 庞凤梅 | Formaldehyde adsorption material and preparation method thereof |
| CN110509384A (en) * | 2018-05-21 | 2019-11-29 | 河北农业大学 | A kind of green persimmon extraction product for controlling Form aldehyde release |
| CN110523258A (en) * | 2019-09-30 | 2019-12-03 | 浙江施维康科技有限公司 | A kind of natural plant type formaldehyde scavenger and preparation method thereof |
| CN211098271U (en) * | 2019-09-29 | 2020-07-28 | 上海奉坤新材料有限公司 | Organic waste gas VOC treatment facility |
-
2021
- 2021-05-28 CN CN202110592872.1A patent/CN113304580A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001070419A (en) * | 1999-09-09 | 2001-03-21 | Mitsubishi Paper Mills Ltd | Air purifying method |
| CN102580688A (en) * | 2012-02-24 | 2012-07-18 | 桂林电子科技大学 | Adsorbing material for removing indoor formaldehyde gas |
| CN104525143A (en) * | 2014-12-25 | 2015-04-22 | 庞凤梅 | Formaldehyde adsorption material and preparation method thereof |
| CN110509384A (en) * | 2018-05-21 | 2019-11-29 | 河北农业大学 | A kind of green persimmon extraction product for controlling Form aldehyde release |
| CN211098271U (en) * | 2019-09-29 | 2020-07-28 | 上海奉坤新材料有限公司 | Organic waste gas VOC treatment facility |
| CN110523258A (en) * | 2019-09-30 | 2019-12-03 | 浙江施维康科技有限公司 | A kind of natural plant type formaldehyde scavenger and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 严敬华: "《柿单宁空气净化机理及应用》", 《日用化学品科学》, 31 January 2020 (2020-01-31), pages 61 - 64 * |
| 马培: "《食用菌废弃物在重金属废水处理中的应用》", 黄河水利出版社, pages: 33 - 35 * |
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Application publication date: 20210827 |