CN102614778B - Simulation device for researching photocatalysed degradation of volatile organic compound (VOC) - Google Patents
Simulation device for researching photocatalysed degradation of volatile organic compound (VOC) Download PDFInfo
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- CN102614778B CN102614778B CN2012101119748A CN201210111974A CN102614778B CN 102614778 B CN102614778 B CN 102614778B CN 2012101119748 A CN2012101119748 A CN 2012101119748A CN 201210111974 A CN201210111974 A CN 201210111974A CN 102614778 B CN102614778 B CN 102614778B
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Abstract
The invention discloses a simulation device for researching photocatalysed degradation of a volatile organic compound (VOC). The simulation device comprises a simulation VOC gas generating chamber capable of communicating and discommunicating, a photocatalysed degradating chamber and an exhaust gas treatment device. A liquid storage tank with VOC volatile liquid and an air and vapor inlet port capable of adjusting thickness and humidity are arranged in the simulation VOC gas generating chamber. The top part of the photocatalysed degradating chamber is provided with a sampling port, and a changeable photocatalyzing light source and a net support, a bracket and the like placing photocatalyst for research are arranged in the photocatalysed degradating chamber. The exhaust gas treatment device can pump the exhaust gas and dissolve the exhaust gas in the absorbent. Dynamic changes of VOC thickness in room and air humidity is simulated via adjusting the thickness of VOC volatile liquid, the wind speed and the vapor amount by the simulation device provided by the invention, photocatalyzing light source and phtocatalyst can be selected according to research purpose. The research on photocatalysed degradation of VOC can be carried out according to different experiment purposes and conditions. The device also has the advantage of simple structure.
Description
Technical field
The present invention relates to the analogue means that photocatalytic degradation VOC is studied.
Background technology
VOC(Volatile organic Compounds) being the abbreviation of VOC, is organic solvent commonly used in building coating, ornament materials face coat raw material.VOC comprises styrene, propane diols, larane, phenol, toluene, ethylbenzene, dimethylbenzene, formaldehyde etc.Because all there is extremely harmful impact in VOC to human body and environment, therefore, except must strictly controlling the content of VOC in various coating, coating material, also must, to what volatilize, especially volatilize and be degraded at indoor VOC.The method of degraded VOC has several, and photocatalysis oxidation technique (being photocatalytic degradation VOC) is one of effective ways very, is also one of method of current people's primary study.For example, utilize special reaction unit to study intensity of illumination impact of the modification of photochemical catalyst, catalytic efficiency and photoresponse scope and light source etc.Yet, owing to being subject to the effectively restriction of design of photocatalytic reaction device, also can't regulate and control VOC concentration in current photocatalytic reaction device, thereby can not simulate real indoor environment.Because in real indoor environment, due to the variation in season, the VOC content in environment can be along with the difference of the heat in indoor environment, the situation such as wet difference, and existing reaction unit all can't simulate out.So, not only unfavorable to further investigation photocatalytic degradation VOC, instruct photocatalytic degradation VOC application in practice nor be beneficial to.
Summary of the invention
The purpose of this invention is to provide a kind of simple structure, and can react the analogue means of the research photocatalytic degradation VOC of true Indoor Environmental Condition.
The technical scheme that realizes described purpose is a kind of like this analogue means of studying photocatalytic degradation VOC, and it comprises can be communicated with or cut off simulation VOC gas generating chamber and the photocatalytic degradation chamber of opening.Wherein, there are an air inlet and a steam air inlet in simulation VOC gas generating chamber, and the receiver that the bottom of this simulation VOC gas generating chamber is provided with interior Sheng VOC volatilization liquid, stop up cotton or sponge are arranged at this receiver tank mouth place.Air inlet is positioned at the side of this simulation VOC gas generating chamber and faces toward ，Qie Qi position, photocatalytic degradation chamber higher than described cotton or sponge 5～10cm, and this air inlet is connected with an adjustable speed air blast by pipeline.Near photocatalytic degradation chamber one side, be provided with filter screen in this simulation VOC gas generating chamber.The top of photocatalytic degradation chamber is provided with sample tap, at the middle part of this photocatalytic degradation chamber, erects the photocatalysis light source is arranged, and is provided with the support that is the bending of W shape in the both sides of this photocatalysis light source, at each Duan Shangjun of this support, has been placed with the rack of photochemical catalyst coated.Also be provided with fan at photocatalytic degradation of indoor.
Using method of the present invention is as follows:
According to research purpose different choice corresponding light catalysis light source; Will for example, as the photochemical catalyst (or appendix photochemical catalyst on carrier) of research object, TiO
2(or TiO
2/ AFC) be coated on rack.Then these racks are placed on the photocatalytic degradation of indoor support.According to research purpose by the concrete VOC(or several concrete VOC that choose) volatilization liquid be contained in receiver, then with cotton or the clogging tank mouth of sponge.After this, will simulate VOC gas generating chamber and photocatalytic degradation chamber and be communicated with, and perform the sampling preparation at the sample tap place of photocatalytic degradation chamber.After all are ready to, the starting air blast, and be filled with in right amount steam according to research purpose at the steam air inlet place of simulation VOC gas generating chamber.Due to the position of air inlet higher than cotton or sponge 5～10cm, so, just formed a negative pressure region above this cotton or sponge.Now, be stored in VOC gas that the VOC volatilization liquid in receiver volatilizes just by cotton or sponge, constantly extracted out and mix with steam, then gaseous mixture, after strainer filtering, all enters the photocatalytic degradation of indoor that now is connected state.At this photocatalytic degradation of indoor while starting fan, to allow gaseous mixture evenly be full of photocatalytic degradation of indoor.Now, from the sampling of the sample tap of photocatalytic degradation chamber, to determine the VOC concentration before photocatalytic degradation.Afterwards, will simulate VOC gas generating chamber and photocatalytic degradation chamber and cut off and open, and the adding of turn off the blast machine and steam; Opening the photocatalysis light source is degraded with the VOC to photocatalytic degradation of indoor.Follow according to pre-determined sampling frequency, the VOC concentration of sequentially determining photocatalytic degradation of indoor, and then obtain photocatalytic degradation of indoor VOC concentration dynamic rule in time.
From scheme and using method of the present invention, introduce, the volatile quantity that the present invention can control VOC by wind speed and the VOC volatilization liquid concentration of adjusting air blast, control the VOC gas concentration; Can control mist humidity by regulating the steam amount of being filled with again.Photocatalysis light source and photochemical catalyst obviously also can be selected according to research purpose.Therefore, can be for different experiments purpose and different experimental conditions research photocatalytic degradation VOC.Evidently the present invention also has advantage simple in structure.
Below in conjunction with accompanying drawing, the present invention is further illustrated.
The accompanying drawing explanation
Fig. 1---structural representation of the present invention;
Fig. 2---the enlarged drawing of simulation VOC gas generating chamber in Fig. 1;
Fig. 3---the enlarged drawing of exhaust gas processing device in Fig. 1;
Fig. 4---photocatalytic degradation chamber in Fig. 1;
Fig. 5---in Fig. 4, A is to view (the Double-layer Sphere revolving door is in the closed condition view);
Fig. 6---in Fig. 4, B is to enlarged drawing.
The specific embodiment
A kind of analogue means (with reference to figure 1,2,3,4) of studying photocatalytic degradation VOC, it comprises can be communicated with or cut off simulation VOC gas generating chamber and the photocatalytic degradation chamber of opening.Wherein, there are an air inlet 14 and a steam air inlet 12 in simulation VOC gas generating chamber, and the receiver 13 that the bottom of this simulation VOC gas generating chamber is provided with interior Sheng VOC volatilization liquid, stop up cotton or sponge 131 are arranged at these receiver 13 tank mouth places.Air inlet 14 is positioned at the side of this simulation VOC gas generating chamber and faces toward ，Qie Qi position, described photocatalytic degradation chamber higher than cotton or sponge 5～10cm; This air inlet 14 is connected with an adjustable speed air blast 1 by pipeline.Near photocatalytic degradation chamber one side, be provided with filter screen 9 in this simulation VOC gas generating chamber.Be provided with sample tap 5 at the top of photocatalytic degradation chamber, erect photocatalysis light source 2 is arranged at the middle part of this photocatalytic degradation chamber, be provided with the support 3 that is W shape bending in the both sides of this photocatalysis light source 2, the rack 16(that is placed with photochemical catalyst 161 coated at each Duan Shangjun of this support 3 is with reference to figure 4,6).Also be provided with fan 4 at photocatalytic degradation of indoor.
Disclose so far, those skilled in the art's combination is to the introduction of using method of the present invention and the analysis of beneficial effect, can, according to different condition and/or requirement, design and produce the analogue means of substantially identical with the present invention research photocatalytic degradation VOC fully.
Below will, on above-mentioned specific embodiment basis, better scheme of the present invention be done further to disclose.
Because the present invention is mainly the analogue means of research photocatalytic degradation VOC, therefore, before often may occurring that VOC also not yet is degraded to and meets the requirements, the corresponding light catalyst is deactivated situation just.Therefore, for the researcher is healthy, consider, the end in the photocatalytic degradation chamber with simulating the contrary side of VOC gas generating chamber, also be connected with and can be communicated with or cut off the exhaust gas processing device (with reference to figure 1,3) of opening with this photocatalytic degradation chamber; This exhaust gas processing device consists of exhaust fan 8, the gas skirt 19 of fixing this exhaust fan 8, the wireway 20 be communicated with this gas skirt 19 of extraction tail gas and the absorption cell 21 that is connected on these wireway 20 tail ends from the photocatalytic degradation chamber simultaneously successively; The absorption liquid 11 that flooded these wireway 20 caudal end egresses is housed in this absorption cell 21.
Indubitable, in the process that photocatalytic degradation is studied, between photocatalytic degradation chamber and exhaust gas processing device, should cut off and open.Just, after research process finishes, just allow both be communicated with that tail gas is processed.When tail gas is processed, at least also should allow the sample tap of photocatalytic degradation chamber be opening-wide state.Absorption liquid in absorption cell can be exactly water, but will note just enough water yields being arranged.
Further, for easy to operate, be convenient to cleaning, the photocatalytic degradation chamber with simulate between VOC gas generating chamber and exhaust gas processing device, all by bell and spigot frame, connect.Be specially, on simulation VOC gas generating chamber and exhaust gas processing device, all have in the socket joint that belongs to circular internal member and encircle 17, in two socket joints, outside ring 17, be provided with sealing ring 171(with reference to figure 1,2,3); The socket joint outer shroud 18(mated with ring in corresponding socket joint 17 is arranged with reference to figure 1,4 at simulation VOC gas generating chamber two ends).
Be communicated with or cut off opening structure between photocatalytic degradation chamber and simulation VOC gas generating chamber and exhaust gas processing device, be be arranged on two ends, photocatalytic degradation chamber Double-layer Sphere revolving door 6(with reference to figure 4,5), the some passages 15 that are uniform state that can mutually align are arranged on Double-layer Sphere revolving door 6; One deck in this Double-layer Sphere revolving door 6 is fixed on this photocatalytic degradation chamber, and another layer of energy can allow all passages 15 seal after a rotating shaft is rotated and rotated.
After adopting Double-layer Sphere revolving door 6, can realize easily the photocatalytic degradation chamber and simulate being communicated with or partition between VOC gas generating chamber and exhaust gas processing device, operability and sealing all are better than other draw and insert-type door close, can meet to the requirement of the even gas distribution in photocatalytic degradation chamber again simultaneously.
In addition, be arranged on the receiver 13 of the interior Sheng VOC volatilization liquid of simulation VOC gas generating chamber bottom, can be placed in this simulation VOC gas generating chamber bottom.Also can as Fig. 1 and Fig. 2, output an installing hole in the bottom of simulation VOC gas generating chamber, but in installing hole, a pallet 10 that shift-in shifts out is installed, receiver 13 is rotated on this pallet 10 and gets final product.Obviously, between this pallet 10 and installing hole, both can be threaded connection mode, and also can adopt gap fiting mode to realize that shift-in shifts out.Simultaneously, moreover between preferably add sealing ring.
Special instruction, clear for drawing, the unlikely part led to misunderstanding in every case in accompanying drawing, all adopt the schematic diagram of mechanism mode to draw.In view of the text description that relates to the Double-layer Sphere revolving door is very clear, therefore relate to the part of Double-layer Sphere revolving door, only for signal, draw.Only with regard to this signal is drawn, the internal layer of Double-layer Sphere revolving door 6 is fixed on this photocatalytic degradation chamber, and thisly fixedly refer to that situation when using state is (for ease of placing photocatalysis light source 2, support 3 and the coated rack 16 of photochemical catalyst at least should have the internal layer of an end to open---only when the state of use).Only with regard to this signal is drawn, because ring 17 in socket joint is circular internal members, and socket joint outer shroud 18 all with socket joint in the ring 17 the coupling, therefore, even if in the situation that simulation VOC gas generating chamber, catalytic degradation chamber and exhaust gas processing device all link together, the skin of Double-layer Sphere revolving door 6 also can rotate, and to allow them cut off, opens (state that Fig. 5 opens according to partition is drawn).
Because the present invention invents for research purpose, therefore, the photocatalysis light source 2 of erectting at middle part, photocatalytic degradation chamber, should be convenient for changing.For example, except replaceable one-tenth ultraviolet source commonly used, also replaceable one-tenth top layer is with the visible light source (with reference to figure 4) of optical filter 7.
Claims (4)
1. an analogue means of studying photocatalytic degradation VOC, is characterized in that this analogue means comprises and can be communicated with or cut off simulation VOC gas generating chamber and the photocatalytic degradation chamber of opening; There are an air inlet (14) and a steam air inlet (12) in described simulation VOC gas generating chamber, the receiver (13) that the bottom of this simulation VOC gas generating chamber is provided with interior Sheng VOC volatilization liquid, stop up cotton or sponge (131) arranged at this receiver (13) tank mouth place; Described air inlet (14) is positioned at the side of this simulation VOC gas generating chamber and faces toward described photocatalytic degradation chamber, and its position is higher than described cotton or sponge 5～10cm, and this air inlet (14) is connected with an adjustable speed air blast (1) by pipeline; Near described photocatalytic degradation chamber one side, be provided with filter screen (9) in this simulation VOC gas generating chamber; The top of described photocatalytic degradation chamber is provided with sample tap (5), erect photocatalysis light source (2) is arranged at the middle part of this photocatalytic degradation chamber, be provided with the support (3) that is W shape bending in the both sides of this photocatalysis light source (2), at each Duan Shangjun of this support (3), be placed with the rack (16) of photochemical catalyst (161) coated; Also be provided with fan (4) at photocatalytic degradation of indoor.
2. study according to claim 1 the analogue means of photocatalytic degradation VOC, it is characterized in that, an end in the described photocatalytic degradation chamber with a described simulation VOC gas generating chamber contrary side, be connected with and can be communicated with or cut off the exhaust gas processing device of opening with this photocatalytic degradation chamber; This exhaust gas processing device is successively by exhaust fan (8), the gas skirt (19) of fixing this exhaust fan (8), the wireway (20) be communicated with this gas skirt (19) of extracting tail gas from described photocatalytic degradation chamber out simultaneously be connected on absorption cell (21) formation of this wireway (20) tail end; The absorption liquid (11) that flooded this wireway (20) caudal end egress is housed in this absorption cell (21).
3. study according to claim 2 the analogue means of photocatalytic degradation VOC, it is characterized in that, between described photocatalytic degradation chamber and simulation VOC gas generating chamber and exhaust gas processing device, all connect by bell and spigot frame; Ring (17) in the socket joint that belongs to circular internal member is all arranged on described simulation VOC gas generating chamber and exhaust gas processing device, in two socket joints, outside ring (17), be provided with sealing ring (171); Socket joint outer shroud (18) with ring (17) coupling in corresponding socket joint is arranged at described simulation VOC gas generating chamber two ends.
4. according to the analogue means of the described research photocatalytic degradation of claim 2 or 3 VOC, it is characterized in that, be communicated with or cut off opening structure between described photocatalytic degradation chamber and simulation VOC gas generating chamber and exhaust gas processing device, be the Double-layer Sphere revolving door (6) that is arranged on two ends, described photocatalytic degradation chamber, the some passages (15) that are uniform state that can mutually align are arranged on Double-layer Sphere revolving door (6); One deck in this Double-layer Sphere revolving door (6) is fixed on this photocatalytic degradation chamber, and another layer of energy can allow all passages (15) seal after a rotating shaft is rotated and rotated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101119748A CN102614778B (en) | 2012-04-17 | 2012-04-17 | Simulation device for researching photocatalysed degradation of volatile organic compound (VOC) |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101119748A CN102614778B (en) | 2012-04-17 | 2012-04-17 | Simulation device for researching photocatalysed degradation of volatile organic compound (VOC) |
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| CN102614778A CN102614778A (en) | 2012-08-01 |
| CN102614778B true CN102614778B (en) | 2013-12-04 |
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| CN104437077B (en) * | 2014-11-10 | 2017-01-25 | 中国科学院生态环境研究中心 | Device for researching photocatalytic treatment on volatile organic compounds |
| CN106984188A (en) * | 2017-04-23 | 2017-07-28 | 王海峰 | A kind of application of Degradation Formaldehyde Laboratory Module, experimental method and photoactivation agent degradation of formaldehyde |
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| CN1171664C (en) * | 2002-11-30 | 2004-10-20 | 哈尔滨工业大学 | Novel photocatalysis reactor for treating organic waste gas |
| JP4637633B2 (en) * | 2005-03-31 | 2011-02-23 | アマノ株式会社 | Combustible VOC gas treatment equipment |
| CN101590347A (en) * | 2008-05-27 | 2009-12-02 | 北京道顺国际技术开发有限责任公司 | But the vertical indoor air cleaner of highly effectively removing volatile organic gas |
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Granted publication date: 20131204 Termination date: 20160417 |