CN115475590A - Double-layer film outdoor smog chamber reactor - Google Patents
Double-layer film outdoor smog chamber reactor Download PDFInfo
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- CN115475590A CN115475590A CN202211348070.7A CN202211348070A CN115475590A CN 115475590 A CN115475590 A CN 115475590A CN 202211348070 A CN202211348070 A CN 202211348070A CN 115475590 A CN115475590 A CN 115475590A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
- B01J19/122—Incoherent waves
- B01J19/123—Ultra-violet light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The invention relates to the field of smoke box reactors, in particular to a double-layer film outdoor smoke box reactor, which comprises: the smoke box reactor is a double-layer membrane hemisphere formed by supporting an inner membrane and an outer membrane through a framework, a closed space in the inner membrane is constructed into a reaction chamber of the smoke box reactor, and a sheath gas purging space for circulating sheath gas is arranged between the inner membrane and the outer membrane; the outside air replacement system is used for enabling actual outside air to enter the smoke box reactor by utilizing the micro negative pressure in the smoke box reactor to replace the gas in the reaction cabin; the protective cover is movably covered outside the smoke box reactor through a rail and used for enabling the smoke box reactor to switch between a sunlight state and a non-light state; the temperature and humidity monitoring system comprises a thermocouple and a temperature and humidity sensor which are arranged in the smog chamber reactor, and is used for monitoring the space-time distribution of the temperature and the humidity in the smog chamber reactor in real time.
Description
Technical Field
The invention relates to the field of smoke box reactors, in particular to a double-layer film outdoor smoke box reactor which introduces actual outside air to simulate a real reaction environment and simultaneously reduces the temperature difference between the inside and the outside of the smoke box reactor.
Background
In recent years, the technology of the present invention has been developedIn recent years, as industry develops, the situation of air pollution is increasingly serious, and the pollution is reduced by fine Particulate Matters (PM) 2.5 ) And ozone (O) 3 ) Typical atmospheric pollutants have received unprecedented attention. At present, ozone (O) 3 ) By photochemical reaction of Volatile Organic Compounds (VOCs) as precursors in the presence of nitrogen oxides to form atmospheric O in the troposphere 3 . Meanwhile, a large amount of secondary organic aerosol can be generated by atmospheric photochemical reaction. Therefore, research on simulating the atmospheric physical and chemical processes becomes the key of atmospheric pollution prevention.
The smoke box is used as an important experimental device essential for atmospheric chemical simulation research, can accurately simulate atmospheric physical and chemical processes under controllable and repeatable conditions, explores atmospheric chemical reaction mechanisms and obtains microscopic reaction mechanisms. The stable independent environment in the smog chamber enables the smog chamber to eliminate the influence of factors such as complex weather and terrain, and the atmospheric chemical mode is verified accurately. The research result obtained by the smoke box provides an important scientific basis for the formulation of an air pollution prevention and control strategy.
The smog chamber reactor commonly used at present can be divided into an outdoor smog chamber and an indoor smog chamber according to the type of a light source. The indoor smog chamber is mainly provided with artificial light sources such as ultraviolet lamps, natural environment is simulated indoors through the artificial light sources, and the indoor smog chamber is widely used in the field of atmospheric chemistry due to the fact that construction and operation are relatively simple at present. However, the spectrum and the illumination intensity of the artificial light source and the actual sunlight have great differences, and it is difficult to completely replace the sunlight by the artificial light source, so that the atmospheric chemical reaction mechanism obtained by the indoor smoke box may have a certain difference from the actual atmospheric chemical reaction, and it is difficult to obtain an accurate atmospheric chemical reaction mechanism.
Outdoor smog chamber can directly utilize actual sunlight as the light source, utilizes the sunlight to carry out atmospheric chemistry experiment, can solve the light source problem that indoor smog chamber exists to a certain extent. The reaction chamber of the outdoor smoke box is generally made of Teflon materials, and the reaction chamber is a relatively closed environment, so that strong greenhouse effect can be generated in the reaction chamber due to the use of Teflon. And lack temperature control system in the current outdoor smog case, cause the inside and outside difference in temperature of smog case great, make the atmosphere chemical reaction mechanism that outdoor smog case simulated probably have the error with actual atmosphere chemical reaction between. Therefore, at present, the greenhouse effect is a main factor for restricting the development of atmospheric chemistry research of the large outdoor smoke box.
Meanwhile, the existing outdoor smog chamber usually uses zero air (pure air) as a reaction medium of the smog chamber, so that a reaction system is relatively single, and gas components in real atmosphere are complex, therefore, the zero air cannot accurately simulate real atmospheric environment, and the exploration of composite atmospheric pollution causes is not facilitated.
Disclosure of Invention
In order to solve at least one technical problem in the foregoing or other aspects, an embodiment of the present invention provides a double-layer film outdoor smoke box reactor, which can introduce actual outside air as a reaction medium, reduce greenhouse effect through a double-layer film structure design, and reduce temperature difference between inside and outside of the smoke box reactor.
According to one aspect of the invention, there is provided a dual-membrane outdoor smoke box reactor comprising:
a smoke chamber reactor configured as a double-layer membrane hemisphere in which an inner membrane and an outer membrane are supported by a frame, the inner membrane inner closed space being configured as a reaction chamber of the smoke chamber reactor, and a sheath gas purge space for circulating a sheath gas being present between the inner membrane and the outer membrane;
the outside air replacement system is used for enabling actual outside air to enter the inside of the smog chamber reactor by utilizing the micro negative pressure in the smog chamber reactor to replace the gas in the reaction cabin;
the protective cover is movably covered outside the smoke box reactor through a rail and used for enabling the smoke box reactor to switch between a sunlight state and a non-light state;
temperature and humidity monitoring system, including setting up thermocouple and the temperature and humidity sensor in above-mentioned smog case reactor, above-mentioned temperature and humidity monitoring system is used for the spatial and temporal distribution of temperature and humidity in the real-time supervision smog case reactor.
According to some embodiments of the invention, the smoke box further comprises sampling ports uniformly distributed at the bottom of the smoke box reactor.
According to some embodiments of the invention, a zero gas inlet is arranged at the bottom of the smoke box reactor and used for inputting zero gas into the smoke box reactor to reduce the concentration of conventional pollutants in the reaction chamber;
the sample inlet is arranged at the bottom of the smoke box reactor and is used for inputting working gas into the smoke box reactor;
and the blending fan is arranged at the bottom of the smog chamber reactor and used for promoting the gas mixing in the smog chamber reactor.
According to some embodiments of the invention, the smoke chamber reactor is constructed from a keel as a plurality of completely closed individual units constructed as a fan-shaped structure wider at the bottom than at the top.
According to some embodiments of the present invention, the inner membrane and the outer membrane are mounted on the surface of the independent unit by means of press sealing, so that a sheath gas purging space is formed between the inner membrane and the outer membrane.
According to some embodiments of the present invention, the bottom ends of the independent units are evenly distributed with sheath gas inlets, the top ends of the independent units are distributed with sheath gas outlets, and the sheath gas inlets and the sheath gas outlets are used for allowing the sheath gas to flow through each of the independent units.
According to some embodiments of the invention, the sheath gas outlet is provided with a filter membrane.
According to some embodiments of the invention, further comprising a sheath gas purge system, the sheath gas purge system comprising:
the air outlet cleanliness of the fresh air supply system is not lower than ten thousand-level particulate matter standard;
and the heat preservation conveying pipeline is used for conveying the air outlet of the fresh air supply system to the sheath air inlet.
According to some embodiments of the invention, the above-described outside air replacement system comprises:
the atmosphere air inlet is arranged at the bottom of the smoke box reactor and used for inputting actual outside atmosphere into the smoke box reactor;
the gas outlet is arranged at the top of the smoke box reactor and used for discharging gas in the smoke box reactor;
and the centrifugal fan is arranged outside the air outlet and used for pumping and adjusting the gas in the reaction chamber to form micro negative pressure in the reaction chamber.
According to some embodiments of the invention, the shield is configured as a box structure having a door;
the protective cover is configured to cover or expose the smoke box reactor by moving on the rail paved on the ground, so that the smoke box reactor can be switched in the sunlight environment or the dark environment.
According to the double-layer film outdoor smog chamber reactor provided by the embodiment of the invention, the double-layer film large outdoor smog chamber reactor is formed by combining the modularized independent units and the double-layer film, so that low-temperature sheath gas can sweep the sheath gas sweeping space to take away heat in the sheath gas sweeping space, the greenhouse effect in the reaction chamber of the smog chamber reactor is further reduced, and finally the temperature difference between the inside and the outside of the smog chamber is less than 15 ℃ when the smog chamber reactor 2 is exposed to the outdoor environment and sunlight. Meanwhile, the smoke box reactor is quickly replaced by the external air (less than 30 min) through the micro negative pressure in the smoke box reactor formed by the centrifugal fan.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the overall structure of a two-layer membrane outdoor smoke box reactor according to an embodiment of the invention;
FIG. 2 is a cross-sectional view of a dual-membrane outdoor smoke box reactor of an embodiment of the present invention;
FIG. 3 is a schematic diagram of sheath gas purging of a dual-membrane outdoor smoke box reactor according to an embodiment of the present invention;
FIG. 4 is a top view of a two-layer film outdoor smoke box reactor of an embodiment of the present invention;
FIG. 5 is a schematic view of the gas flow in the case of exchanging the external air in the double-film outdoor smoke box reactor according to the embodiment of the present invention.
In the above figures, the reference numerals have the following meanings in detail:
1-a protective cover; 2-smoke box reactor; 3-outer membrane; 4-purging the space with sheath gas; 5-inner membrane; 6-a sampling port; 7-sample inlet; 8-manhole; 9-mixing fan; 10-atmospheric air intake; 11-a butterfly valve; 12-a centrifugal fan; 13-keel; 14-zero air inlet; 15-a pressure sensor; 16-a sensor holder; 17-a temperature and humidity sensor; 18-a track; 19-a position sensor; 20-a stand-alone unit; 21-sheath gas valve; 22-fresh air supply system; 23-sheath gas inlet; 24-an air outlet; 25-heat preservation conveying pipelines; 26-a filtration membrane; 27-sheath gas outlet.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.
All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.
FIG. 1 is a schematic diagram of the overall configuration of a two-layer membrane outdoor smoke box reactor of an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a two-layer film outdoor smoke box reactor of an embodiment of the present invention.
According to one aspect of the invention, as shown in figures 1 and 2, there is provided a dual membrane outdoor smoke box reactor comprising: a protective cover 1 and a smoke box reactor 2.
The protective cover 1 is configured to be movably covered outside the smoke box reactor 2 through a rail 18, and is used for enabling the smoke box reactor 2 to switch between a sunlight state and a non-sunlight state.
The smoke box reactor 2 is characterized in that the smoke box reactor 2 is configured into a double-layer membrane hemisphere formed by supporting an inner membrane 5 and an outer membrane 3 through a framework, a closed space in the inner membrane 5 is configured into a reaction chamber of the smoke box reactor 2, and a sheath gas purging space 4 for flowing sheath gas exists between the inner membrane 5 and the outer membrane 3.
And the outside air replacement system is used for utilizing micro negative pressure in the smog chamber reactor 2 to enable actual outside atmosphere to enter the smog chamber reactor 2 to replace gas in the reaction cabin.
Humiture monitoring system, including setting up thermocouple and temperature and humidity sensor 17 in smog case reactor 2, humiture monitoring system is used for the spatial and temporal distribution of humiture in real-time supervision smog case reactor 2.
According to the embodiment of the invention, the double-layer film outdoor smog chamber reactor also comprises a zero air inlet 14, a sample inlet 7 and a blending fan 9.
And the zero gas inlet 14 is arranged at the bottom of the smoke box reactor 2 and used for inputting zero gas into the smoke box reactor 2 and reducing the concentration of conventional pollutants in the reaction chamber.
And the sample inlet 7 is arranged at the bottom of the smoke box reactor 2 and is used for inputting working gas into the smoke box reactor 2.
Mixing fan 9, set up and 2 bottoms in smog case reactor for promote the gas mixture in the smog case reactor 2.
According to the double-layer film outdoor smoke box reactor provided by the embodiment of the invention, the modularized independent unit 20 and the double-layer film are combined to form the double-layer film large-scale outdoor smoke box reactor, so that the low-temperature sheath gas sweeps the sheath gas sweeping space 4 to take away heat in the sheath gas sweeping space 4, the greenhouse effect in the reaction chamber of the smoke box reactor 2 is further reduced, and the temperature difference between the inside and the outside of the smoke box when the smoke box reactor 2 is exposed to the outdoor environment and sunlight is less than 15 ℃.
According to the embodiment of the invention, the temperature and humidity monitoring system consists of 6 thermocouples uniformly distributed on the wall of the smoke box reactor 2 and 3 temperature and humidity sensors 17 positioned in the middle of the smoke box reactor 2. Wherein, temperature and humidity sensor 17 passes through sensor support 16 to be installed on smog case reactor 2 wall.
According to an embodiment of the invention, the inner membrane 5 and the outer membrane 3 are teflon membranes.
According to some embodiments of the invention, the smoke chamber reactor 2 is constructed from the root keel 13 as a plurality of completely closed individual units 20, the individual units 20 being constructed in a fan-shaped configuration with the bottom end wider than the top end.
According to some embodiments of the invention, the individual cells 20 may be a closed fan-shaped structure of 3-16 longitudinal keels.
According to some embodiments of the present invention, the keel 13 can be made of new materials instead of stainless steel with rapid heat absorption effect, and has high strength wind resistance, and the keel 13 area is further reduced.
According to some embodiments of the invention, the sheath gas outlet 27 is provided with a filter membrane 26.
Wherein, the sheath gas outlet 27 can be provided with a filtering membrane 26 for filtering particles on one hand, and on the other hand, the resistance can be increased to form a pressure difference in the sheath gas sweeping space 4.
According to some embodiments of the invention, further comprising a sheath gas purge system, the sheath gas purge system comprising:
the air outlet cleanliness of the fresh air supply system 22 is not lower than ten thousand-level particulate matter standards;
and the heat preservation conveying pipeline 25 is used for conveying the air outlet of the fresh air supply system 22 to the sheath air inlet 23.
According to some embodiments of the present invention, a sheath gas valve 21 is disposed on the heat-insulating delivery pipe 25 in front of the sheath gas inlet 23, for controlling the sheath gas purging wind speed in the sheath gas purging space 4. The sheath gas purging system controls the switch by a central control program, controls the temperature of the sheath gas to be 16-50 ℃, and meets different experimental requirements.
According to some embodiments of the present invention, the fresh air supply system 22 uses a centralized cold and heat source and performs primary, intermediate, and high-level filtration, and the air outlet cleanliness is not lower than ten thousand-level particulate standards (≧ 0.5um ≦ 352/L).
The positive pressure is utilized to enable the clean and speed-adjustable low-temperature air to carry away heat through the inner part of the sheath gas blowing space, the design basically solves the problem of the common greenhouse effect of the smoke box, and the temperature difference between the inside and the outside of the smoke box is controlled within 15 ℃;
according to the embodiment of the invention, the wall of the smoke box is cleaned by adjusting the temperature of the sheath gas to 50 ℃ and passing through the inner space of the double-layer film.
According to the embodiment of the invention, CO can be added into the sheath gas 2 Gas containing fluorine compound, CO 2 The fluorine-containing compound can absorb infrared rays in sunlight so as to further reduce the greenhouse effect of the smoke box reactor 2.
According to some embodiments of the invention, the dual-layer film outdoor smoke box reactor further comprises sampling ports 6 uniformly distributed at the bottom of the smoke box reactor 2;
according to some embodiments of the invention, the dual-membrane outdoor smoke box reactor further comprises a sampling analysis system comprising a plurality of samplers for monitoring the time variation of gaseous and particulate chemicals in the smoke box reactor 2 in real time by placing the samplers in the sampling ports 6.
According to the embodiment of the invention, 10 sampling ports 6 are uniformly distributed at the bottom of the smoke box reactor 2, and the sampling ports 6 can be flange plate sampling ports.
According to some embodiments of the invention, the bottom of smoke box reactor 2 is also provided with manhole 8 and pressure sensor 15.
FIG. 3 is a schematic diagram of sheath gas purging of a dual-membrane outdoor smoke box reactor according to an embodiment of the present invention.
According to some embodiments of the present invention, the inner membrane 5 and the outer membrane 3 are mounted on the surface of the independent unit 20 by means of press sealing, so that the sheath gas purging space 4 is formed between the inner membrane 5 and the outer membrane 3.
For example, an inner film 5 and an outer film 3 of Teflon material with a thickness of 100 μm are pressed and sealed to the modularized keel 13 to form a double-layer film structure with a distance of 80-100mm, wherein the inner film 5 is closed to form a reaction chamber of the smoke box reactor 2, and the volume of the reaction chamber can be 100m 3 Left and right.
According to some embodiments of the present invention, as shown in fig. 3, the independent units 20 are evenly distributed with sheath gas inlets 23 at the bottom end and sheath gas outlets 27 at the top end, the sheath gas inlets 23 and the sheath gas outlets 27 are used for circulating sheath gas in each independent unit 20, and arrows in fig. 3 represent the flowing direction of the sheath gas.
FIG. 4 is a top view of a two-layer film outdoor smoke box reactor of an embodiment of the present invention.
According to some embodiments of the invention, the smoke box reactor 2 is also provided with a manhole 8 at the bottom.
FIG. 5 is a schematic view of the flow of air when the outside air is exchanged in the double-film outdoor smoke box reactor according to the embodiment of the present invention.
According to some embodiments of the present invention, as shown in FIG. 5, the outside air replacement system includes an atmospheric air inlet 10, a centrifugal fan 12, and an air outlet 24.
And the atmosphere air inlet 10 is arranged at the bottom of the smog chamber reactor 2 and is used for inputting actual outside atmosphere into the smog chamber reactor 2.
And the centrifugal fan 12 is arranged outside the air outlet 24 and used for pumping and adjusting air in the reaction chamber to form micro negative pressure in the reaction chamber.
And the air outlet 24 is arranged at the top of the smoke box reactor 2 and used for discharging the air in the smoke box reactor 2.
The air exhausting quantity of the centrifugal fan 12 arranged at the top of the smoke box reactor 2 is more than or equal to 25m 3 Min, as shown in fig. 5, fig. 5 shows the use principle of the double-layer film large outdoor smoke box reactor of the invention when the actual outside atmosphere enters, wherein the arrows indicate the flow direction of the atmosphere. Constantly take out the air in smog case reactor 2 after opening, the back is opened to bottom atmosphere air inlet 10, and the little negative pressure in smog case reactor 2 makes inside the quick atmospheric air inlet 10 entering smog case reactor 2 of passing through of actual external atmosphere, constantly replaces inside air. The air outlet 24 at the top of the smoke box reactor 2 and the air inlet 10 at the bottom are controlled by a butterfly valve 11.
The time for quickly replacing the gas in the reaction chamber into the actual external atmosphere is less than 30min by a micro-negative pressure method, and a negative pressure technology is introduced into the smoke box reactor, so that the gas inlet does not need any gas pump to completely replace the gas in the smoke box reactor into the external atmosphere for the first time under the condition of not changing the components of the external atmosphere, and the possibility of developing scientific research by using the actual external atmosphere in different seasons and different times (morning, noon and evening) is realized.
According to some embodiments of the present invention, a rain cap is fitted to centrifugal fan 12 at the top of smoke box reactor 2 to meet the scientific needs of replacing the actual ambient atmosphere into smoke box reactor 2 under different weather conditions.
According to some embodiments of the invention, the protection shield 1 is configured as a box structure with a door;
the hood 1 is configured to cover or expose the smoke chamber reactor 2 by moving on a ground-laid rail 18, so that the smoke chamber reactor 2 can be switched between a sunlight environment and a dark environment.
According to some embodiments of the invention, the protective cover 1 is mainly built of profiled steel material, three sides are fixed walls, and one side is a roller shutter door, so that the protective cover 1 can comprehensively protect the smoke box reactor 2. The bottom of the protective cover 1 is provided with a plurality of groups of driving motors, so that the protective cover 1 can move quickly on a track 18 laid on the ground, and the protective cover can be moved to be opened in 2 minutes to completely expose the smoke box reactor in sunlight, thereby solving the problem that the protective cover of the existing large outdoor smoke box is slow in movement.
According to some embodiments of the present invention, the two ends of the track 18 of the protection cover 1 are provided with position sensors 19, and when the sensors on the protection cover 1 detect the limiting device, the driving motor stops working; when the protective cover 1 touches the limit switch, the equipment contactor is powered off.
The technical solutions of the present invention are described in detail below by using preferred embodiments, and it should be noted that the following specific embodiments are only examples and are not intended to limit the present invention.
Example 1:
the principle of use of this embodiment to introduce different levels of actual ambient air into the smoke box in different seasons, at different times (morning, noon and evening) is generally as follows:
the air outlet 24 at the top of the smoke box reactor 2 is opened for flow>The aerosol chamber reactor 2 is continuously purged with 100L/min of clean air until the normal pollutants NOx, O 3 Is lower than the detection limit;
closing an air outlet 24 at the top of the smoke box reactor 2, and stopping cleaning with pure air;
adding CO gas of about 10ppmv into the working gas, placing for 2 hours under dark condition, and calculating the gas leakage rate of the smoke box reactor 2 according to the concentration change of CO
Wherein C is 0 And C t The initial concentration of CO and the concentration of the reaction time t are respectively;
opening an air outlet 24 at the top of the smoke box reactor 2, opening a centrifugal fan 12 at the top of the smoke box reactor 2 after 30 seconds, and continuously pumping out working gas in the smoke box reactor 2 by the centrifugal fan 12 to form slight negative pressure in the smoke box reactor 2;
opening an atmosphere air inlet 10 at the bottom of the smoke box reactor 2 after 30 seconds, and continuously introducing actual external atmosphere into the smoke box reactor 2 to replace internal working gas under the action of negative pressure;
the CO analyzer monitors the CO concentration in the smoke box reactor 2 in real time, indicating that the working gas in the smoke box reactor 2 has been completely replaced with actual ambient atmosphere after the CO concentration has decreased from 10ppmv to 300 ppmv, the time required being <30min.
The butterfly valve 11 of the air inlet 24 at the top and the air inlet 10 at the bottom of the smoke box reactor 2 are closed, and the centrifugal fan 12 at the top of the smoke box reactor 2 is closed.
Further experiments can now be carried out using the actual ambient atmosphere within the smoke box reactor 2.
Example 2:
the principles of use of the smoke box reactor 2 of this example to reduce the greenhouse effect in the reaction chamber are generally as follows:
under the condition that a protective cover 1 of the large outdoor smog chamber is kept closed (under the dark condition), temperature sensors 17 uniformly distributed at the bottom and the middle of a smog chamber reactor 2 are used for monitoring the temperature in the reaction chamber along with the change of time and space;
opening the roller shutter door of the protective cover 1, and then driving the protective cover 1 to rapidly move on the track 18 through a driving motor at the bottom of the protective cover 1 until the smoke box reactor 2 is exposed to sunlight;
rapidly moving the protective cover 1 to the state that the protective cover 1 completely shields the smoke box reactor 2 and closing the roller shutter door through a driving motor and a track 18 at the bottom of the protective cover 1;
under the condition that the protective cover 1 is kept closed (under the dark condition), a fresh air supply system 22 is opened, the atmosphere passes through a cold and heat source and is subjected to primary, intermediate and high-level filtration, the air outlet cleanliness is not lower than the ten thousand-level particulate matter standard, and the air is conveyed to a sheath air valve 21 through a heat-insulating conveying pipeline 25;
the sheath gas valve 21 is opened, the low-temperature sheath gas (16 ℃) starts to be blown and swept through the sheath gas inlet 23 of the double-layer film, the internal heat of the blowing space and the keel 13 of the sheath gas is taken away, and the temperature in the reaction chamber of the smoke box reactor 2 is further reduced.
Opening the roller shutter door of the protective cover 1, and then rapidly moving the protective cover 1 through the track 18 at the bottom of the protective cover 1 to expose the smoke box reactor 2 to sunlight;
and further photochemical simulation experiments can be carried out by utilizing the large outdoor smog chamber.
So far, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. It is to be understood that the implementations not shown or described in the drawings or in the text of this specification are in a form known to those skilled in the art and are not described in detail. In addition, the above definitions of the components are not limited to the specific structures, shapes or manners mentioned in the embodiments, and those skilled in the art may easily modify or replace them.
It is also noted that, unless otherwise indicated, the numerical parameters set forth in the specification and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by the present disclosure. In particular, all numbers expressing dimensions of components, ranges, and so forth used in the specification and claims are to be understood as being modified in all instances by the term "about". In general, the meaning of the expression is meant to encompass variations of a specified number by ± 10% in some embodiments, by ± 5% in some embodiments, by ± 1% in some embodiments, by ± 0.5% in some embodiments.
It will be appreciated by a person skilled in the art that various combinations and/or combinations of features described in the various embodiments and/or in the claims of the invention are possible, even if such combinations or combinations are not explicitly described in the invention. In particular, various combinations and/or combinations of the features recited in the various embodiments and/or claims of the present invention may be made without departing from the spirit or teaching of the invention. All such combinations and/or associations fall within the scope of the present invention.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A dual-membrane outdoor smoke box reactor comprising:
the smoke box reactor (2), wherein the smoke box reactor (2) is configured to be a double-layer membrane hemisphere formed by supporting an inner membrane (5) and an outer membrane (3) through a framework, the closed space in the inner membrane (5) is configured to be a reaction chamber of the smoke box reactor (2), and a sheath gas sweeping space (4) for flowing sheath gas is arranged between the inner membrane (5) and the outer membrane (3);
the outside air replacement system is used for enabling actual outside air to enter the interior of the smog chamber reactor (2) by utilizing the micro negative pressure in the smog chamber reactor (2) to replace the gas in the reaction cabin;
the protective cover (1) is movably covered outside the smoke box reactor (2) through a rail (18) and is used for enabling the smoke box reactor (2) to switch between a sunlight state and a non-light state;
temperature and humidity monitoring system, including set up in thermocouple and temperature and humidity sensor (17) in smog case reactor (2), temperature and humidity monitoring system is used for the spatial and temporal distribution of humiture in real-time supervision smog case reactor (2).
2. The dual-layer film outdoor smoke box reactor of claim 1, further comprising sampling ports (6) evenly distributed at the bottom of the smoke box reactor (2).
3. The dual-membrane outdoor smoke box reactor of claim 1, further comprising
The zero gas inlet (14) is arranged at the bottom of the smoke box reactor (2) and is used for inputting zero gas into the smoke box reactor (2) and reducing the concentration of conventional pollutants in the reaction chamber;
the sample inlet (7) is arranged at the bottom of the smog chamber reactor (2) and is used for inputting working gas into the smog chamber reactor (2);
mixing fan (9), set up in smog case reactor (2) bottom is used for promoting the gaseous mixture in smog case reactor (2).
4. The dual-membrane outdoor smoke box reactor of claim 1, said smoke box reactor (2) being constructed of a keel (13) as a plurality of completely closed individual units (20), said individual units (20) being constructed as a fan-shaped structure wider at the bottom than at the top.
5. A double membrane outdoor smoke box reactor according to claim 3, wherein said inner membrane (5) and said outer membrane (3) are mounted on the surface of said separate unit (20) by means of press sealing, such that a sheath gas purging space (4) is formed between said inner membrane (5) and said outer membrane (3).
6. The dual-membrane outdoor smoke box reactor of claim 3, wherein said individual units (20) have a sheath gas inlet (23) evenly distributed at the bottom end and a sheath gas outlet (27) distributed at the top end, said sheath gas inlet (23) and said sheath gas outlet (27) being adapted to allow said sheath gas to circulate in each of said individual units (20).
7. A dual membrane outdoor smoke box reactor according to claim 5, said sheath gas outlet (27) being provided with a filter membrane (26).
8. The dual-membrane outdoor smoke box reactor of claim 5, further comprising a sheath gas purge system comprising:
the fresh air supply system (22), the air outlet cleanliness of the fresh air supply system (22) is not lower than ten thousand-level particulate matter standard;
and the heat preservation conveying pipeline (25) is used for conveying the air outlet of the fresh air supply system (22) to the sheath air inlet (23).
9. The dual-membrane outdoor smoke box reactor of claim 1, said ambient air displacement system further comprising:
the atmosphere air inlet (10) is arranged at the bottom of the smog chamber reactor (2) and is used for inputting actual outside atmosphere into the smog chamber reactor (2);
the gas outlet (24) is arranged at the top of the smoke box reactor (2) and is used for discharging gas in the smoke box reactor (2);
and the centrifugal fan (12) is arranged on the outer side of the gas outlet (24) and used for pumping and adjusting gas in the reaction chamber to form micro negative pressure in the reaction chamber.
10. The dual-membrane outdoor smoke box reactor of claim 1, said protection shield (1) being configured as a box structure with a door;
the protective hood (1) is configured to be able to cover or expose the smoke chamber reactor (2) by moving on the track (18) laid on the ground, so that the smoke chamber reactor (2) can be switched in a sunlight environment or a dark environment.
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| CN202211348070.7A CN115475590A (en) | 2022-10-31 | 2022-10-31 | Double-layer film outdoor smog chamber reactor |
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| CN210474020U (en) * | 2019-07-08 | 2020-05-08 | 哈亦德科技开发有限公司 | Atmosphere simulation equipment |
| CN211537793U (en) * | 2020-01-02 | 2020-09-22 | 北京康威能特环境技术有限公司 | Double-layer hemispherical photochemical smog chamber |
| CN114910607A (en) * | 2022-03-28 | 2022-08-16 | 暨南大学 | Vehicular indoor and outdoor double smoke box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040031424A1 (en) * | 2002-05-17 | 2004-02-19 | Pope Michael G. | Appratus for waste gasification |
| CN101259370A (en) * | 2007-12-20 | 2008-09-10 | 丁雄 | Multi-medium flue gas purifying reaction tower |
| CN205925730U (en) * | 2016-06-28 | 2017-02-08 | 北京合欣环境技术有限公司 | Hemisphere photochemical smog case |
| CN209673383U (en) * | 2019-03-14 | 2019-11-22 | 嘉兴中科检测技术服务有限公司 | A kind of tributary smoke from cigarette generating device |
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| CN114910607A (en) * | 2022-03-28 | 2022-08-16 | 暨南大学 | Vehicular indoor and outdoor double smoke box |
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