Double-layer membrane outdoor smoke chamber reactor

Abstract

The invention relates to the field of smoke box reactors, and in particular to a double-layer membrane outdoor smoke box reactor, comprising: a smoke box reactor, wherein the smoke box reactor is configured as a double-layer membrane hemisphere formed by supporting an inner membrane and an outer membrane through a skeleton, wherein a closed space inside the inner membrane is configured as a reaction chamber of the smoke box reactor, and a sheath gas purge space for sheath gas circulation is provided between the inner membrane and the outer membrane; an external air replacement system, which is used to utilize a slight negative pressure inside the smoke box reactor to allow actual external atmosphere to enter the interior of the smoke box reactor to replace the gas inside the reaction chamber; a protective cover, which is configured to movably cover the outside of the smoke box reactor through a track, and is used to switch the smoke box reactor between a sunlight state and a lightless state; and a temperature and humidity monitoring system, which comprises a thermocouple and a temperature and humidity sensor arranged in the smoke box reactor, and the temperature and humidity monitoring system is used to monitor the temporal and spatial distribution of temperature and humidity in the smoke box reactor in real time.

Description

Technical Field

[0001] The invention relates to the field of smoke box reactors, in particular to a double-layer membrane outdoor smoke box reactor which introduces actual external air to simulate a real reaction environment and reduces the temperature difference between the inside and outside of the smoke box reactor. Background Art

[0002] At present, the main source of ozone (O3) is through volatile organic compounds (VOCs) as precursors, in the presence of nitrogen oxides, through photochemical reactions to generate O3 in the troposphere. At the same time, atmospheric photochemical reactions can also produce a large amount of secondary organic aerosols. Therefore, the study of simulating atmospheric physical and chemical processes has become the key to air pollution prevention and control.

[0003] As an important experimental device indispensable for atmospheric chemistry simulation research, the smog chamber can accurately simulate atmospheric physical and chemical processes under controllable and repeatable conditions, explore atmospheric chemical reaction mechanisms, and obtain microscopic reaction mechanisms. The relatively stable and independent environment in the smog chamber allows it to eliminate the influence of complex meteorological and topographical factors and more accurately verify atmospheric chemical models. The research results obtained through the smog chamber will provide an important scientific basis for the formulation of air pollution prevention and control measures.

[0004] The commonly used smoke chamber reactors can be divided into outdoor smoke chambers and indoor smoke chambers according to the type of light source. Among them, the indoor smoke chamber mainly installs artificial light sources such as ultraviolet lamps to simulate the natural environment indoors. At present, indoor smoke chambers are widely used in the field of atmospheric chemistry because of their relatively simple construction and operation. However, there is a large gap between the spectrum, light intensity and other characteristics of artificial light sources and actual sunlight. It is difficult to completely replace sunlight with artificial light sources. Therefore, the atmospheric chemical reaction mechanism obtained by the indoor smoke chamber may be different from the actual atmospheric chemical reaction, and it is difficult to obtain an accurate atmospheric chemical reaction mechanism.

[0005] Outdoor smoke boxes can directly use actual sunlight as a light source, and use sunlight to conduct atmospheric chemistry experiments, which can solve the light source problem of indoor smoke boxes to a certain extent. The reaction chamber of the outdoor smoke box is generally made of Teflon. Since the reaction chamber is a relatively closed environment, the use of Teflon will cause a strong greenhouse effect in the reaction chamber. The existing outdoor smoke box lacks a temperature control system, resulting in a large temperature difference between the inside and outside of the smoke box, so that the atmospheric chemical reaction mechanism simulated by the outdoor smoke box may have an error with the actual atmospheric chemical reaction. It can be seen that at present, the greenhouse effect is the main factor restricting the use of large outdoor smoke boxes to carry out atmospheric chemistry research.

[0006] At the same time, current outdoor smoke chambers usually use zero air (pure air) as the reaction medium of the smoke chamber, making the reaction system relatively simple. However, the gas composition in the real atmosphere is relatively complex. Therefore, the use of zero air cannot accurately simulate the real atmospheric environment, and is not conducive to the study of the causes of complex atmospheric pollution. Summary of the invention

[0007] In order to solve at least one of the above or other technical problems, an embodiment of the present invention provides a double-layer membrane outdoor smoke box reactor, which can introduce actual outside air as a reaction medium, and at the same time reduce the greenhouse effect through the double-layer membrane structure design, thereby reducing the temperature difference between the inside and outside of the smoke box reactor.

[0008] According to one aspect of the present invention, there is provided a double-layer membrane outdoor smoke box reactor, comprising:

[0009] A smoke box reactor, wherein the smoke box reactor is configured as a double-layer membrane hemisphere formed by supporting an inner membrane and an outer membrane through a skeleton, the closed space within the inner membrane is configured as a reaction chamber of the smoke box reactor, and a sheath gas purge space for sheath gas circulation exists between the inner membrane and the outer membrane;

[0010] An outside air replacement system is used to utilize the slight negative pressure in the smoke box reactor to allow the actual outside atmosphere to enter the inside of the smoke box reactor to replace the gas inside the reaction chamber;

[0011] A protective cover is configured to cover the outside of the smoke box reactor movably via a track, and is used to switch the smoke box reactor between a sunlight state and a dark state;

[0012] The temperature and humidity monitoring system comprises a thermocouple and a temperature and humidity sensor arranged in the above-mentioned smoke box reactor. The temperature and humidity monitoring system is used for real-time monitoring of the temporal and spatial distribution of temperature and humidity in the smoke box reactor.

[0013] According to some embodiments of the present invention, it also includes sampling ports evenly distributed at the bottom of the smoke box reactor.

[0014] According to some embodiments of the present invention, a zero gas inlet is provided at the bottom of the above-mentioned smoke box reactor, and is used to input zero gas into the above-mentioned smoke box reactor to reduce the concentration of conventional pollutants in the reaction chamber;

[0015] An inlet, disposed at the bottom of the smoke box reactor, for inputting working gas into the smoke box reactor;

[0016] A mixing fan is arranged at the bottom of the smoke box reactor and is used to promote gas mixing in the smoke box reactor.

[0017] According to some embodiments of the present invention, the smoke box reactor is constructed by a keel into a plurality of completely closed independent units, and the independent units are constructed into a fan-shaped structure with a bottom end wider than a top end.

[0018] According to some embodiments of the present invention, the inner membrane and the outer membrane are installed on the surface of the independent unit by compression sealing, so that a sheath gas purge space is formed between the inner membrane and the outer membrane.

[0019] According to some embodiments of the present invention, sheath gas inlets are evenly distributed at the bottom of the above-mentioned independent units, and sheath gas outlets are evenly distributed at the top. The above-mentioned sheath gas inlets and the above-mentioned sheath gas outlets are used to allow the above-mentioned sheath gas to circulate in each of the above-mentioned independent units.

[0020] According to some embodiments of the present invention, the sheath gas outlet is provided with a filter membrane.

[0021] According to some embodiments of the present invention, a sheath gas purge system is further included, and the sheath gas purge system includes:

[0022] Fresh air supply system: the air cleanliness of the fresh air supply system shall not be lower than the 10,000-grade particle standard;

[0023] The heat-insulated delivery pipeline is used to deliver the air outlet of the above-mentioned fresh air supply system to the above-mentioned sheath air inlet.

[0024] According to some embodiments of the present invention, the above-mentioned external air replacement system includes:

[0025] An atmospheric air inlet is provided at the bottom of the smoke box reactor and is used to input actual external air into the smoke box reactor;

[0026] An air outlet is provided at the top of the smoke box reactor and is used to discharge the gas in the smoke box reactor;

[0027] The centrifugal fan is arranged outside the gas outlet and is used to extract the gas in the reaction chamber to form a slight negative pressure in the reaction chamber.

[0028] According to some embodiments of the present invention, the protective cover is configured as a box structure having a door;

[0029] The protective cover is configured to cover or expose the smoke box reactor by moving on the track laid on the ground, so that the smoke box reactor can be switched between a sunlight environment or a dark environment.

[0030] According to the double-layer membrane outdoor smoke box reactor provided by the above embodiment of the present invention, a modular independent unit is combined with a double-layer membrane to form a double-layer membrane large outdoor smoke box reactor, which can make the low-temperature sheath gas purge the sheath gas purge space to take away the heat in the sheath gas purge space, thereby reducing the greenhouse effect in the reaction chamber of the smoke box reactor, and finally making the temperature difference between the inside and outside of the smoke box <15 ° C when the smoke box reactor 2 is exposed to the outdoor environment and sunlight. At the same time, the micro-negative pressure in the smoke box reactor formed by the centrifugal fan finally makes the smoke box reactor quickly replace the outside air (<30 min). BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0032] Figure 1 2 is a schematic diagram of the overall structure of a double-layer membrane outdoor smoke box reactor according to an embodiment of the present invention;

[0033] Figure 2 is a cross-sectional view of a double-layer membrane outdoor smoke box reactor according to an embodiment of the present invention;

[0034] Figure 3 Schematic diagram of sheath gas purge of a double-layer membrane outdoor smoke box reactor according to an embodiment of the present invention;

[0035] Figure 4 is a top view of a double-layer membrane outdoor smoke box reactor according to an embodiment of the present invention;

[0036] Figure 5 It is a schematic diagram of gas flow when external air is replaced in a double-layer membrane outdoor smoke box reactor according to an embodiment of the present invention.

[0037] In the above drawings, the meanings of the reference numerals are as follows:

[0038] 1-protective cover; 2-smoke box reactor; 3-outer membrane; 4-sheath gas purge space; 5-inner membrane; 6-sampling port; 7-inlet; 8-manhole; 9-mixing fan; 10-atmospheric air inlet; 11-butterfly valve; 12-centrifugal fan; 13-keel; 14-zero air inlet; 15-pressure sensor; 16-sensor bracket; 17-temperature and humidity sensor; 18-track; 19-position sensor; 20-independent unit; 21-sheath gas valve; 22-fresh air supply system; 23-sheath gas inlet; 24-outlet; 25-insulation delivery pipeline; 26-filter membrane; 27-sheath gas outlet. DETAILED DESCRIPTION

[0039] Below, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of embodiments of the present invention. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of concepts of the present invention.

[0040] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0041] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0042] Figure 1 It is a schematic diagram of the overall structure of a double-layer membrane outdoor smoke box reactor according to an embodiment of the present invention.

[0043] Figure 2 4 is a cross-sectional view of a double-layer membrane outdoor smoke box reactor according to an embodiment of the present invention.

[0044] According to one aspect of the present invention, Figure 1 and Figure 2 As shown, a double-layer membrane outdoor smoke box reactor is provided, comprising: a protective cover 1 and a smoke box reactor 2.

[0045] The protective cover 1 is constructed to be movably covered on the outside of the smoke box reactor 2 via a track 18, so as to switch the smoke box reactor 2 between a sunlight state and a dark state.

[0046] The smoke box reactor 2 is configured as a double-layer membrane hemisphere formed by an inner membrane 5 and an outer membrane 3 supported by a skeleton. The closed space inside the inner membrane 5 is constructed as a reaction chamber of the smoke box reactor 2. There is a sheath gas purge space 4 between the inner membrane 5 and the outer membrane 3 for the circulation of sheath gas.

[0047] The external air replacement system is used to utilize the slight negative pressure in the smoke box reactor 2 to allow the actual external atmosphere to enter the smoke box reactor 2 to replace the gas inside the reaction chamber.

[0048] The temperature and humidity monitoring system includes a thermocouple and a temperature and humidity sensor 17 arranged in the smoke box reactor 2. The temperature and humidity monitoring system is used to monitor the temporal and spatial distribution of temperature and humidity in the smoke box reactor 2 in real time.

[0049] According to an embodiment of the present invention, the double-layer membrane outdoor smoke box reactor further includes a zero air inlet 14 , a sample inlet 7 and a mixing fan 9 .

[0050] The zero gas inlet 14 is disposed at the bottom of the smoke box reactor 2 and is used to input zero gas into the smoke box reactor 2 to reduce the concentration of conventional pollutants in the reaction chamber.

[0051] The sample inlet 7 is arranged at the bottom of the smoke box reactor 2 and is used to input the working gas into the smoke box reactor 2 .

[0052] The mixing fan 9 is arranged at the bottom of the smoke box reactor 2 to promote the mixing of the gases in the smoke box reactor 2 .

[0053] The double-layer membrane outdoor smoke box reactor provided according to the above-mentioned embodiment of the present invention is combined with a double-layer membrane to form a double-layer membrane large outdoor smoke box reactor through a modular independent unit 20, so that low-temperature sheath gas can be blown into the sheath gas blowing space 4 to take away the heat in the sheath gas blowing space 4, thereby reducing the greenhouse effect in the reaction chamber of the smoke box reactor 2, and finally making the temperature difference between the inside and outside of the smoke box <15 °C when the smoke box reactor 2 is exposed to the outdoor environment and sunlight.

[0054] According to an embodiment of the present invention, the temperature and humidity monitoring system is composed of 6 thermocouples evenly distributed on the wall of the smoke box reactor 2 and 3 temperature and humidity sensors 17 located in the middle of the smoke box reactor 2. The temperature and humidity sensors 17 are installed on the wall of the smoke box reactor 2 through the sensor bracket 16.

[0055] According to an embodiment of the present invention, the inner film 5 and the outer film 3 are Teflon films.

[0056] According to some embodiments of the present invention, the smoke box reactor 2 is constructed by a root keel 13 into a plurality of completely closed independent units 20, and the independent unit 20 is constructed into a fan-shaped structure with a bottom end wider than a top end.

[0057] According to some embodiments of the present invention, the independent unit 20 may be a closed fan-shaped structure composed of 3 to 16 longitudinal keels.

[0058] According to some embodiments of the present invention, the keel 13 may be made of a new material to replace the stainless steel with a rapid heat absorption effect, while having high-strength wind resistance and further reducing the area of ​​the keel 13 .

[0059] The modular keel 13 may also be a hollow structure with evenly distributed pores, which can further remove the heat of the smoke box reactor 2 by blowing with low-temperature sheath gas (16°C), thereby reducing the greenhouse effect of the smoke box reactor 2.

[0060] According to some embodiments of the present invention, the sheath gas outlet 27 is provided with a filter membrane 26 .

[0061] A filter membrane 26 may be installed at the sheath gas outlet 27 to filter particles on one hand and increase resistance to form a pressure difference in the sheath gas purge space 4 on the other hand.

[0062] According to some embodiments of the present invention, a sheath gas purge system is further included, and the sheath gas purge system includes:

[0063] Fresh air supply system 22, the air cleanliness of the fresh air supply system 22 is not less than the 10,000-grade particle standard;

[0064] The heat-insulating delivery pipe 25 is used to deliver the air output from the fresh air supply system 22 to the sheath air inlet 23 .

[0065] According to some embodiments of the present invention, a sheath gas valve 21 is provided on the heat preservation delivery pipe 25 in front of the sheath gas inlet 23 to control the sheath gas purge wind speed in the sheath gas purge space 4. The sheath gas purge system is controlled by a central control program to control the sheath gas temperature to 16-50°C to meet different experimental requirements.

[0066] According to some embodiments of the present invention, the fresh air supply system 22 adopts centralized cold and hot sources and undergoes primary, secondary and high-level filtration, and the air cleanliness is not lower than the 10,000-level particle standard (≧0.5 um≦352 particles / L).

[0067] The clean and adjustable low-temperature air is blown through the sheath gas purge space by positive pressure to remove heat. This design basically solves the greenhouse effect problem that is common in smoke boxes, and keeps the temperature difference between the inside and outside of the smoke box within 15 ℃.

[0068] According to an embodiment of the present invention, the sheath gas temperature is adjusted to 50° C. and passes through the inner space of the double-layer membrane to achieve the effect of cleaning the wall of the smoke box.

[0069] According to an embodiment of the present invention, gases such as CO 2 and fluorine-containing compounds may be added to the sheath gas. CO 2 and fluorine-containing compounds may absorb infrared light in sunlight to further reduce the greenhouse effect of the smoke box reactor 2 .

[0070] According to some embodiments of the present invention, the double-layer membrane outdoor smoke box reactor further comprises sampling ports 6 evenly distributed at the bottom of the smoke box reactor 2;

[0071] According to some embodiments of the present invention, the double-layer membrane outdoor smoke box reactor also includes a sampling and analysis system, which includes a plurality of samplers for real-time monitoring of the temporal changes of gaseous and particulate chemicals in the smoke box reactor 2 by arranging the samplers in the sampling port 6.

[0072] According to an embodiment of the present invention, there are 10 sampling ports 6 evenly distributed at the bottom of the smoke box reactor 2, and the sampling ports 6 can be set as flange sampling ports.

[0073] According to some embodiments of the present invention, a manhole 8 and a pressure sensor 15 are further provided at the bottom of the smoke box reactor 2 .

[0074] Figure 3 Schematic diagram of sheath gas purge of a double-layer membrane outdoor smoke box reactor according to an embodiment of the present invention.

[0075] According to some embodiments of the present invention, the inner membrane 5 and the outer membrane 3 are installed on the surface of the independent unit 20 by means of compression sealing, so that a sheath gas purge space 4 is formed between the inner membrane 5 and the outer membrane 3 .

[0076] For example, the inner membrane 5 and the outer membrane 3 of 100 μm thick Teflon material are sealed to the modular keel 13 to form a double-layer membrane structure with a spacing of 80-100 mm, wherein the inner membrane 5 is closed to form the reaction chamber of the smoke box reactor 2, and the volume thereof can be 100 m 3 about.

[0077] According to some embodiments of the present invention, Figure 3 As shown, the independent units 20 are evenly distributed with sheath gas inlets 23 at the bottom and sheath gas outlets 27 at the top. The sheath gas inlets 23 and the sheath gas outlets 27 are used to allow the sheath gas to flow in each independent unit 20. Figure 3 The middle arrow represents the flow direction of the sheath gas.

[0078] Figure 4 1 is a top view of a double-layer membrane outdoor smoke box reactor according to an embodiment of the present invention.

[0079] According to some embodiments of the present invention, a manhole 8 is further provided at the bottom of the smoke box reactor 2 .

[0080] Figure 5 It is a schematic diagram of gas flow when external air is replaced in a double-layer membrane outdoor smoke box reactor according to an embodiment of the present invention.

[0081] According to some embodiments of the present invention, Figure 5 As shown, the outside air replacement system includes an atmospheric air inlet 10 , a centrifugal fan 12 and an air outlet 24 .

[0082] The atmospheric air inlet 10 is arranged at the bottom of the smoke box reactor 2 and is used to input the actual external atmosphere into the smoke box reactor 2 .

[0083] The centrifugal fan 12 is disposed outside the gas outlet 24 and is used to extract gas from the reaction chamber to form a slight negative pressure in the reaction chamber.

[0084] The gas outlet 24 is disposed at the top of the smoke box reactor 2 and is used to discharge the gas in the smoke box reactor 2 .

[0085] The exhaust volume of the centrifugal fan 12 installed on the top of the smoke chamber reactor 2 is ≥ 25 m 3 / min, such as Figure 5 As shown, Figure 5 The principle of use of the double-layer membrane large outdoor smoke box reactor of the present invention when the actual outside atmosphere enters is shown, wherein the arrow indicates the flow direction of the atmosphere. After opening, the air in the smoke box reactor 2 is continuously extracted. After the bottom atmospheric air inlet 10 is opened, the slight negative pressure in the smoke box reactor 2 causes the actual outside atmosphere to quickly enter the smoke box reactor 2 through the atmospheric air inlet 10, continuously replacing the internal air. The air outlet 24 at the top of the smoke box reactor 2 and the atmospheric air inlet 10 at the bottom are both controlled by the butterfly valve 11.

[0086] Through the method of slight negative pressure, the gas in the reaction chamber can be quickly replaced by the actual outside atmosphere in less than 30 minutes. The negative pressure technology is introduced into the smoke box reactor, so that the air inlet does not need any air pump. For the first time, the gas inside the smoke box reactor can be completely replaced by the outside atmosphere without changing the composition of the outside atmosphere, thus realizing the possibility of conducting scientific research using the actual outside atmosphere in different seasons and at different times (morning, noon and evening).

[0087] According to some embodiments of the present invention, a rain cap is installed on the centrifugal fan 12 on the top of the smoke box reactor 2 to meet the scientific demand of replacing the actual external atmosphere into the smoke box reactor 2 under different weather conditions.

[0088] According to some embodiments of the present invention, the protective cover 1 is configured as a box structure having a door;

[0089] The protective cover 1 is configured to cover or expose the smoke box reactor 2 by moving on a track 18 laid on the ground, so that the smoke box reactor 2 can be switched between a sunlight environment or a dark environment.

[0090] According to some embodiments of the present invention, the protective cover 1 is mainly constructed of steel materials, with three sides being fixed walls and one side being a rolling door, so that the protective cover 1 can fully protect the smoke box reactor 2. A plurality of drive motors are installed at the bottom of the protective cover 1, so that the protective cover 1 can move quickly on the track 18 laid on the ground, and the protective cover can be moved within 2 minutes to fully expose the smoke box reactor to sunlight, solving the problem of slow movement of protective covers commonly found in large outdoor smoke boxes.

[0091] According to some embodiments of the present invention, position sensors 19 are installed at both ends of the track 18 of the protective cover 1. When the sensor on the protective cover 1 detects the limit device, the drive motor stops working; when the protective cover 1 touches the limit switch, the equipment contactor is powered off.

[0092] The technical solution of the present invention is described in detail below through preferred embodiments. It should be noted that the specific embodiments below are only used for illustration and are not used to limit the present invention.

[0093] Embodiment 1:

[0094] The principle of using the actual outside air with different pollution levels into the smoke box in different seasons and different times (morning, noon and evening) is roughly as follows:

[0095] Open the air outlet 24 at the top of the smoke box reactor 2, and continuously purge the smoke box reactor 2 with pure air at a flow rate of >100 L / min until the concentrations of conventional pollutants NOx and O3 are below the detection limit;

[0096] Close the air outlet 24 at the top of the smoke box reactor 2 to stop the clean air cleaning;

[0097] Add about 10 ppmv of CO gas into the working gas and place it in the dark for 2 hours. Calculate the leakage rate k of the smoke box reactor 2 based on the change in CO concentration. , where C0 and C t are the initial concentration of CO and the concentration after reaction to time t, respectively;

[0098] The gas outlet 24 on the top of the smoke box reactor 2 is opened, and after 30 seconds, the centrifugal fan 12 on the top of the smoke box reactor 2 is turned on. At this time, the centrifugal fan 12 continuously extracts the working gas inside the smoke box reactor 2, so that a slight negative pressure is formed inside the smoke box reactor 2;

[0099] After 30 seconds, the atmospheric air inlet 10 at the bottom of the smoke box reactor 2 is opened, and the actual external atmosphere continuously enters the smoke box reactor 2 under the effect of negative pressure to replace the internal working gas;

[0100] The CO analyzer monitors the CO concentration in the smoke box reactor 2 in real time. When the CO concentration drops from 10 ppmv to 300 ppbv, it indicates that the working gas in the smoke box reactor 2 has been completely replaced by the actual external atmosphere, and the time required is less than 30 minutes.

[0101] The butterfly valve 11 of the air outlet 24 at the top of the smoke box reactor 2 and the atmospheric air inlet 10 at the bottom is closed, and then the centrifugal fan 12 at the top of the smoke box reactor 2 is closed.

[0102] At this point, further experiments can be conducted using the actual ambient atmosphere within the smoke box reactor 2.

[0103] Embodiment 2:

[0104] The principle of using the smoke box reactor 2 of this embodiment to reduce the greenhouse effect in the reaction chamber is roughly as follows:

[0105] When the protective cover 1 of the large outdoor smoke box is kept closed (under dark conditions), the temperature changes in the reaction chamber with time and space are monitored by temperature sensors 17 evenly distributed at the bottom and middle of the smoke box reactor 2;

[0106] Open the rolling door of the protective cover 1, and then drive the protective cover 1 to move quickly on the track 18 through the driving motor at the bottom of the protective cover 1, until the smoke box reactor 2 is exposed to sunlight;

[0107] The temperature sensors 17 at the bottom and middle of the smoke box reactor 2 can monitor the rapid rise in temperature inside the smoke box reactor 2, which can reach a maximum of 55°C at noon in summer;

[0108] The protective cover 1 is quickly moved by the driving motor and the track 18 at the bottom of the protective cover 1 until the protective cover 1 completely covers the smoke box reactor 2, and the rolling door is closed;

[0109] When the protective cover 1 is kept closed (under dark conditions), the fresh air supply system 22 is turned on, and the air passes through the cold and hot sources and undergoes primary, secondary and high-level filtration. The air cleanliness is not lower than the 10,000-level particle standard, and is transported to the sheath air valve 21 through the heat preservation delivery pipe 25;

[0110] The sheath gas valve 21 is opened, and low-temperature sheath gas (16 °C) begins to purge through the sheath gas inlet 23 of the double-layer membrane, taking away the internal heat of the sheath gas purge space and the keel 13, thereby reducing the temperature in the reaction chamber of the smoke box reactor 2.

[0111] Open the rolling door of the protective cover 1, and then quickly move 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;

[0112] The temperature sensors 17 at the bottom and middle of the smoke box reactor 2 detect that the temperature in the smoke box rises slowly, and the highest temperature is only 45°C at noon in summer, so that the temperature difference between the inside and outside of the smoke box is less than 15°C;

[0113] Further photochemical simulation experiments can then be carried out using large outdoor smog chambers.

[0114] So far, the embodiments of the present disclosure have been described in detail in conjunction with the accompanying drawings. It should be noted that the implementation methods not shown or described in the drawings or the body of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each component are not limited to the various specific structures, shapes or methods mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0115] It should also be noted that, in the specific embodiments of the present disclosure, unless otherwise indicated, the numerical parameters in the present specification and the attached claims are approximate values ​​and can be changed according to the desired characteristics obtained through the content of the present disclosure. Specifically, all numbers used in the specification and claims to express the size, range conditions, etc. of the composition should be understood to be modified by the term "about" in all cases. In general, the meaning of the expression refers to the change of ±10% in some embodiments, ±5% in some embodiments, ±1% in some embodiments, and ±0.5% in some embodiments by a specific number.

[0116] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

[0117] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-layer membrane outdoor smoke box reactor, comprising: A smoke box reactor (2), the smoke box reactor (2) being configured as a double-layer membrane hemisphere formed by an inner membrane (5) and an outer membrane (3) supported by a skeleton, the closed space inside the inner membrane (5) being configured as a reaction chamber of the smoke box reactor (2), a sheath gas purge space (4) for sheath gas circulation being present between the inner membrane (5) and the outer membrane (3), wherein carbon dioxide is added to the sheath gas; An outside air replacement system, used to utilize the slight negative pressure in the smoke box reactor (2) to allow actual outside air to enter the inside of the smoke box reactor (2) to replace the gas inside the reaction chamber, so that the gas inside the smoke box reactor (2) is completely replaced by outside air; A protective cover (1) is configured to movably cover the outside of the smoke box reactor (2) via a track (18) and is used to switch the smoke box reactor (2) between a sunlight state and a dark state; A temperature and humidity monitoring system, comprising a thermocouple and a temperature and humidity sensor (17) arranged in the smoke box reactor (2), the temperature and humidity monitoring system being used to monitor the temporal and spatial distribution of temperature and humidity in the smoke box reactor (2) in real time; Wherein, the external air replacement system further comprises: An atmospheric air inlet (10) is arranged at the bottom of the smoke box reactor (2) and is used to input actual external atmosphere into the smoke box reactor (2); An air outlet (24) is arranged at the top of the smoke box reactor (2) and is used to discharge the gas in the smoke box reactor (2); a centrifugal fan (12), arranged outside the gas outlet (24), and used to extract gas from the reaction chamber to form a slight negative pressure in the reaction chamber; Wherein, the double-layer membrane outdoor smoke box reactor also includes a sheath gas purge system, and the sheath gas purge system includes: A fresh air supply system (22), wherein the cleanliness of air discharged from the fresh air supply system (22) is not less than a 10,000-grade particle standard; An insulated delivery pipe (25) for delivering the air outlet of the fresh air supply system (22) to the sheath air inlet (23); The sheath gas purge system controls the temperature of the sheath gas to be between 16°C and 50°C, and cleans the inner wall of the smoke box reactor (2) by adjusting the temperature of the sheath gas to 50°C and passing through the inner space of the double-layer membrane.

2. The double-layer membrane outdoor smoke box reactor according to claim 1, further comprising sampling ports (6) evenly distributed at the bottom of the smoke box reactor (2).

3. The double-layer membrane outdoor smoke box reactor according to claim 1, further comprising: A zero gas inlet (14) is arranged at the bottom of the smoke box reactor (2) and is used to input zero gas into the smoke box reactor (2) to reduce the concentration of conventional pollutants in the reaction chamber; An inlet (7) is arranged at the bottom of the smoke box reactor (2) and is used to input working gas into the smoke box reactor (2); A mixing fan (9) is arranged at the bottom of the smoke box reactor (2) and is used to promote mixing of gases in the smoke box reactor (2).

4. The double-layer membrane outdoor smoke box reactor according to claim 1, wherein the smoke box reactor (2) is constructed by a keel (13) into a plurality of completely closed independent units (20), and the independent units (20) are constructed into a fan-shaped structure with a bottom end wider than a top end.

5. According to the double-layer membrane outdoor smoke box reactor of claim 4, the inner membrane (5) and the outer membrane (3) are installed on the surface of the independent unit (20) by means of compression sealing, so that a sheath gas purge space (4) is formed between the inner membrane (5) and the outer membrane (3).

6. According to the double-layer membrane outdoor smoke box reactor of claim 4, the independent units (20) are evenly distributed with sheath gas inlets (23) at the bottom and sheath gas outlets (27) at the top, and the sheath gas inlets (23) and the sheath gas outlets (27) are used to allow the sheath gas to circulate in each of the independent units (20).

7. The double-layer membrane outdoor smoke box reactor according to claim 6, wherein the sheath gas outlet (27) is provided with a filter membrane (26).

8. The double-layer membrane outdoor smoke box reactor according to claim 1, wherein the protective cover (1) is configured as a box structure having a door; The protective cover (1) is configured to cover or expose the smoke box reactor (2) by moving on the track (18) laid on the ground, so that the smoke box reactor (2) can be switched between a sunlight environment or a dark environment.

Images