CN210743272U

CN210743272U - Simulated atmosphere complex reaction system with built-in substrate source

Info

Publication number: CN210743272U
Application number: CN201921623609.9U
Authority: CN
Inventors: 陈秀; 周杰滔; 刘华莹; 邱涛; 裘彦挺; 梁大鹏
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-06-12
Anticipated expiration: 2029-09-27

Abstract

The utility model provides a simulation atmosphere complex reaction system with built-in substrate source, the reaction condition is controllable, various complex reactions in the atmosphere complex system can be well simulated, compared with other large-scale smoke boxes, the system is easy to transport and has the characteristics of multifunction and easy operation, the existing smoke box is not provided with a substrate generating device, the leading-in of smoke is complex, and the wall loss in a certain transmission process is caused, the system connects a substrate generating chamber and a reaction chamber, the loss, pollution and waste in the transmission process are greatly reduced, the simulation reaction is facilitated, the device is flexible, simple and effective, the energy consumption is low, the wall loss is small, the sealing effect is good, the chemical reaction process of various complex systems can be simulated, the effect is obvious, the sampling device can fully collect samples in the reaction chamber, the follow-up combination with detection equipment can better explore various reaction processes, the device can be widely applied to the scientific research and teaching field in the aspect of atmospheric research.

Description

Simulated atmosphere complex reaction system with built-in substrate source

Technical Field

The utility model belongs to teaching and scientific research equipment field relates to a complicated reaction system of simulation atmosphere of built-in substrate source, concretely relates to system that mobilizable, can be sealed, can system inside produce substrate and simulate the complicated chemical reaction of atmosphere.

Background

The atmospheric particulate matters are a general term of various solid and liquid particulate matters existing in the atmosphere, and the main sources of the atmospheric particulate matters are biomass combustion, energy combustion and the like. Various granular substances are uniformly dispersed in the air to form a relatively stable and huge suspension system which can absorb and scatter solar radiation, change atmospheric radiation flux and reduce atmospheric visibility. Atmospheric particulates are an important factor causing atmospheric pollution, and many environmental problems such as acid rain, haze, photochemical smog, climate change and the like are related to the atmospheric particulates. The particulate matter can initiate an atmospheric pollution change process different from a short-term pollution event through processes of moisture absorption growth, photochemical reaction, heterogeneous reaction and the like in the complex system of the atmosphere, so that new particles are formed, and secondary pollution is further initiated.

Under the complex system of atmosphere, the smoke box simulation system is an effective means, can be used for researching the reaction process and mechanism of atmospheric pollutants, can separate the complex physical and chemical reaction of atmosphere from other variable factors, has repeatability, and is an important tool for researching the influencing factors of the generation and evolution process of atmospheric environment particles.

The foreign research on large-scale smog chambers is early, but the large-scale smog chambers mostly belong to outdoor smog chambers, and have the advantages of large occupied area, complex structure, difficulty in carrying, high cost, complex detection procedure and long reaction period. And some smoke boxes with smaller volume are not provided with a substrate generating device, and the smoke is mostly transported by a pipeline and is mostly used for researching photochemical reaction of pure substances as substrates. In addition, although small-size smog chamber area is little, be convenient for remove, the pipeline wall loss is great, and the function is single, can't deeply study the conversion process of particulate matter under the complicated system.

Disclosure of Invention

The utility model provides a simulation atmosphere complex reaction system with a built-in substrate source, which solves the problems in the prior art.

The utility model discloses an adopt following technical scheme to realize:

a simulated atmosphere complex reaction system with a built-in substrate source comprises a hollow rectangular stainless steel box with an opening at the top and a closed bottom, the interior of the box is divided into two chambers by a stainless steel clapboard, the device comprises a box body, a manual spiral valve, a first ball valve, a second ball valve, a first feeding port cover plate, a second feeding port cover plate, a third feeding port cover plate, a fourth feeding port cover plate and a fourth feeding port cover plate, wherein the cavity in the front of the box body is a substrate generation cavity, the cavity in the rear of the box body is a reaction cavity, the middle of the partition is provided with a partition circular through hole, the manual spiral valve is used for opening or closing the circular through hole, the front wall of the box body is provided with a No. 1;

the part of the left side wall of the box body corresponding to the bottom of the reaction chamber is provided with a No. 2 ball valve which connects or disconnects the reaction chamber with the outside of the box body, the back wall of the box body is provided with a No. 3 ball valve which connects or disconnects the reaction chamber with the outside of the box body, the inner surface of the right side wall of the box body is fixed with a transverse ultraviolet light lamp tube, the inner surface of the back wall of the box body is also fixed with a transverse lamp tube, the part of the left side wall of the box body corresponding to the middle part of the reaction chamber is provided with a glass window for observing the inside of the reaction chamber, the inside of the reaction chamber is provided with a temperature and humidity detector, the outside of the box body is provided with a temperature and humidity display which is connected with the temperature and humidity detector, the inside of the reaction chamber is provided with a fan and a humidifier, the outer surface of the back wall of the box body is provided with a distribution, and the pipe wall of the stainless steel pipeline and the rear wall of the box body are fixed and sealed in a welding mode, the rear wall of the box body is provided with a sampling device, the sampling device is communicated with a gas collecting box through an air pump, the opening of the substrate generation chamber is covered and sealed by a No. 1 top cover steel plate, and the opening of the reaction chamber is covered and sealed by a No. 2 top cover steel plate.

The further technical scheme comprises the following steps:

wall upper portion is opened on the box back has a 5 # hickey that have the through-hole structure of internal screw thread, sampling device is the reducing head that a front portion diameter is greater than the hollow stainless steel material of rear portion diameter, there is the external screw thread on the large diameter section of reducing head, the large diameter section and the No. 5 hickey threaded connection of reducing head, set up by two stainless steel net boards in the large diameter section of reducing head, be provided with the sampling membrane between two stainless steel net boards, the opening of the small diameter section of reducing head is connected with the air inlet of aspiration pump, the gas outlet and the gas collecting box intercommunication of aspiration pump.

The partition plate is provided with a No. 1 threaded interface with a through hole structure with internal threads, the air inlet of the No. 1 ball valve is provided with external threads, and the air inlet of the No. 1 ball valve is in threaded connection with the No. 1 threaded interface; the part of the left side wall of the box body, which corresponds to the bottom of the reaction chamber, is provided with a No. 2 threaded interface with an internal thread through hole structure, the air inlet of the No. 2 ball valve is provided with an external thread, and the air inlet of the No. 2 ball valve is in threaded connection with the No. 2 threaded interface; the rear wall of the box body is provided with a No. 3 threaded connector with an internal threaded through hole structure, the air inlet of the No. 3 ball valve is provided with an external thread, the air inlet of the No. 3 ball valve is in threaded connection with the No. 3 threaded connector, and the air outlet of the No. 3 ball valve is connected with an air pump.

The manual screw valve comprises a disc-shaped rotating hand wheel with a handle, the rotating hand wheel is fixedly connected with a disc-shaped flange plate through a lead screw with external threads, the diameter of the flange plate is larger than that of the circular through hole of the partition plate, the lead screw is in threaded connection with the internal thread through hole, the middle of the lead screw is in threaded connection with a sleeve with internal threads, the internal thread sleeve is fixedly connected with a support rod, the support rod is perpendicular to the lead screw and is positioned on the same horizontal plane, and two ends of the support rod are respectively fixed on the inner surface of the left side wall of the box body and the inner surface of the right side wall of the box body. A teflon sealing gasket for sealing is fixedly arranged on the disk surface of the flange plate 27 contacted with the partition plate.

The substrate generating source is an electric combustion furnace or a reaction vessel.

The lower surface of No. 1 top cap steel sheet and the lower surface of No. 2 top cap steel sheet all are provided with the sealed pad of special fluorine dragon that the one deck played sealed effect, and No. 1 top cap steel sheet adopts stainless steel screw connection and screws with box and baffle, and No. 2 top cap steel sheet adopts stainless steel screw connection and screws with box and baffle.

The surface of the feed inlet cover plate, which is attached to the box body, is provided with a Teflon sealing pad which plays a role in sealing, and the feed inlet cover plate and the box body are connected through stainless steel screws and are screwed tightly.

A circular through hole is formed in the No. 2 top cover steel plate, the temperature and humidity detector penetrates through the circular through hole and extends into the reaction chamber, and a sealing ring playing a sealing role is arranged between the temperature and humidity detector and the circular through hole.

The volume ratio of the substrate generation chamber to the reaction chamber is 1: 3.

four corners of the lower surface of the bottom plate of the box body are respectively provided with a universal wheel with a foot brake.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a pair of complicated reaction system of simulation atmosphere of built-in substrate source, simple structure, application method is simple, the simple operation, and reaction condition is steerable within certain interval, simulates the reaction of various complicacies in the complicated system of atmosphere betterly. Compare with other large-scale smog casees, the utility model discloses easily transport has the characteristics of multi-functional easy operation. The substrate generating chamber is connected with the reaction chamber, so that the loss, pollution and waste in the transmission process are greatly reduced, and the analog reaction is facilitated. The utility model discloses the device is nimble, and is simple effective, and the energy consumption hangs down the wall loss and is little, because it seals effectually, can simulate the chemical reaction process of multiple complicated system, and the effect is showing, and the sample in the reacting chamber can fully be collected to the sampling device from the area, and follow-up and check out test set ally oneself with to ally oneself with can explore various reaction processes better, can extensively be used for the scientific research teaching field in the aspect of the atmospheric research.

Drawings

The invention will be further described with reference to the accompanying drawings:

fig. 1 is a perspective view of the present invention.

Fig. 2 is an axial perspective view of the present invention.

Fig. 3 is a schematic structural diagram of the manual screw valve of the present invention.

Fig. 4 is an exploded schematic view of the sampling device of the present invention.

In the figure: 1. the device comprises a substrate generation chamber, a reaction chamber 2, a threaded connector No. 3.1, a ball valve No. 4.1, a feed inlet 5, a substrate generation source 6, a manual screw valve 7, a circular through hole 8, a sealing ring 9, a threaded connector No. 10.2, a ball valve No. 11.2, a threaded connector No. 12.3, a ball valve No. 13.3, a threaded connector No. 14.4, a stainless steel grid 15, a reducer 16, a glass window 17, a lamp tube 18, a temperature and humidity detector 19, a temperature and humidity display 20, a fan 21, a humidifier 22, a universal wheel 23 with a foot brake, a distribution box 24, a rotary hand wheel 25, a screw rod 26, a flange 27, a support frame 28 and a sleeve 29

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

the utility model provides a complicated reaction system of simulation atmosphere of built-in substrate source, including the box of the hollow rectangle stainless steel material of an open-top bottom confined, the length that the box was made for adopting thickness to be 5 mm's stainless steel panel through welding method is 160cm, wide is 100cm, the height is 100 cm's rectangle box, and four angles of box bottom plate lower surface respectively are provided with a universal wheel 23 of taking the service brake.

The inside baffle by a stainless steel material of box is separated into two cavities, and wherein the cavity that is located the front portion of box is the substrate and generates room 1, and the cavity that is located the rear portion of box is reaction chamber 2, and the volume ratio of substrate generation room 1 and reaction chamber 2 is 1: 3.

the middle part of the partition is provided with a circular through hole of the partition, a manual screw valve 7 is used for opening or closing the circular through hole, an internal thread through hole is arranged on the front wall of the box body, the circle center of the internal thread through hole and the circle center of the circular through hole of the partition are on the same horizontal line, the manual screw valve 7 comprises a disk-shaped rotating hand wheel 25 with a handle, the rotating hand wheel 25 is fixedly connected with a disk-shaped flange 27 through a screw rod 26 with external threads, the diameter of the flange 27 is larger than that of the circular through hole of the partition, the screw rod 26 is in threaded connection with the internal thread through hole, the middle part of the screw rod 26 is in threaded connection with a sleeve 29 with internal threads, the internal thread sleeve 29 is fixedly connected with a support rod 28, the support rod 28 and the screw rod 26 are perpendicular and are positioned on the same horizontal plane. A teflon sealing gasket for sealing is fixedly arranged on the disk surface of the flange plate 27 contacted with the partition plate.

The front wall of the box body is provided with a No. 1 ball valve 4 for communicating or disconnecting the substrate generation chamber 1 and the reaction chamber 2, a No. 1 threaded connector 3 with an internal thread through hole structure is arranged on the partition board 10cm away from the bottom plate of the box body, the diameter of the No. 1 threaded connector 3 is 47mm, the air inlet of the No. 1 ball valve 4 is provided with an external thread, and the air inlet of the No. 1 ball valve 4 is in threaded connection with the No. 1 threaded connector 3; the substrate generation chamber 1 is internally provided with a substrate generation source 6 for a substrate to react and generate a product, the substrate generation source 6 is an electric combustion furnace which is arranged on a bottom plate of a box body, a feed inlet 5 is arranged on a left side plate of the box body corresponding to the bottom of the substrate generation chamber 1, the feed inlet is a square opening with the length of 30cm and the width of 30cm, a stainless steel material feed inlet cover plate is arranged on the box body and used for opening or closing the feed inlet 5, a Teflon sealing gasket for sealing is arranged on the surface of the feed inlet cover plate, which is attached to the box body, the feed inlet cover plate and the box body are connected and screwed by stainless steel screws, and the feed inlet cover plate and the Teflon sealing gasket are 40cm long, 40cm wide and 5mm thick.

A part of the left side wall of the box body, which corresponds to the bottom of the reaction chamber 2, is provided with a No. 2 ball valve 11 which connects or disconnects the reaction chamber 2 with the outside of the box body, a part of the left side wall of the box body, which corresponds to the bottom of the reaction chamber 2, is provided with a No. 2 threaded connector 10 with an internal threaded through hole structure, the diameter of the No. 2 threaded connector 10 is 47mm, an air inlet of the No. 2 ball valve 11 is provided with an external thread, and an air inlet of the No. 2 ball valve 11 is in threaded connection with the No. 2 threaded connector.

The rear wall of the box body is provided with a No. 3 ball valve 13 which connects or disconnects the reaction chamber 2 with the outside of the box body, the rear wall of the box body is provided with a No. 3 threaded connector 12 with an internal thread through hole structure, the diameter of the No. 3 threaded connector 12 is 47mm, the air inlet of the No. 3 ball valve 13 is provided with an external thread, and the air inlet of the No. 3 ball valve 13 is in threaded connection with the No. 3 threaded connector 12. The No. 3 ball valve 13 is connected with an air pump and used for increasing the flow rate of air in the chamber, or is matched with the No. 2 ball valve 11 to supplement air or other air in the chamber, or is matched with the manual screw valve 7 and the No. 1 ball valve 3 to guide reactants in the substrate generation chamber into the chamber 2;

a transversely-arranged lamp tube 18 is fixed on the inner surface of the right side wall of the box body, a transversely-arranged lamp tube 18 is also fixed on the inner surface of the rear wall of the box body, the distance between the two lamp tubes 18 and the bottom plate of the box body is 60cm, the lamp tube 18 can be an ultraviolet lamp or other spectrum lamp tubes, a glass window 17 for observing the inside of the reaction chamber 2 is arranged at the position, corresponding to the middle part of the reaction chamber 2, of the left side wall of the box body, a temperature and humidity detector 19 is arranged in the reaction chamber 2, a circular through hole 8 is formed in the No. 2 top cover steel plate, the temperature and humidity detector 19 extends into the reaction chamber 2 through the circular through hole 8, and a sealing ring 9 for sealing is arranged between the temperature. A temperature and humidity display 20 connected with a temperature and humidity detector 19 is arranged outside the box body, a fan 21 and a humidifier 22 are arranged in the reaction chamber 2, the humidifier 22 is used for changing the humidity in the reaction chamber 2, the fan 21 enables reactants in the reaction chamber 2 to be uniformly mixed and reduces the particle sedimentation in a certain period of time, a distribution box 25 is arranged on the outer surface of the rear wall of the box body, the electric combustion furnace is connected with the distribution box 25 through an electric wire in a stainless steel pipeline penetrating through a partition plate and the rear wall of the box body, the pipe wall of the stainless steel pipeline is fixed and sealed with the partition plate and the rear wall of the box body in a welding mode, the two ultraviolet light tubes 18, the temperature and humidity detector 19, the fan 21 and the humidifier 22 are connected with the distribution box 25 through electric wires in the stainless steel pipeline penetrating through the rear wall of the box body, and the pipe wall of the stainless steel pipeline is fixed and, the upper portion of the rear wall of the box body is provided with a No. 5 threaded connector 14 with an internal threaded through hole structure, an external thread is arranged on a large-diameter section of the variable-diameter head 16, the large-diameter section of the variable-diameter head 16 is in threaded connection with the No. 5 threaded connector 14, a stainless steel grid plate 15 with the diameter of 47mm is arranged in the large-diameter section of the variable-diameter head 16, and a sampling film is arranged between the two stainless steel grid plates 15. The small diameter section of the reducer head 16 is open to a gas collection tank via a suction pump, and the threaded No. 5 connector 14 may be connected to a PM10 cutter or a PM2.5 cutter for collecting particulate matter of a particular size. The opening of the substrate generation chamber 1 is sealed by a No. 1 top cover steel plate cover, and the opening of the reaction chamber 2 is sealed by a No. 2 top cover steel plate cover. The lower surface of No. 1 top cap steel sheet and the lower surface of No. 2 top cap steel sheet all are provided with the sealed pad of special fluorine dragon that the one deck played sealed effect, and No. 1 top cap steel sheet adopts stainless steel screw connection and screws with box and baffle, and No. 2 top cap steel sheet adopts stainless steel screw connection and screws with box and baffle.

The utility model discloses a theory of operation and working process as follows: 1) the raw materials react in the substrate generating chamber 1 to generate a target substrate, the target substrate enters the reaction chamber 2 after the partition plate through hole is opened by the aid of the manual screw valve 7, and the manual screw valve 7 is closed by rotating the rotating hand wheel 25 after the reaction chamber 2 is filled with the substrate. The areas of the flange plate 27 of the manual spiral valve 7 and the Teflon sealing gasket are larger than the area of the through hole of the partition plate, so that the complete sealing function is realized, the rotating hand wheel 25 is positioned outside the box body, the operation is convenient, and the safety performance is good.

2) After the reaction chamber 2 is sealed, the relative humidity in the system is controlled by the humidifier 22, and the illumination intensity in the reaction chamber 2 is controlled by the lamp 18. The fan 21 is used to mix the substrate in the reaction chamber 2 uniformly and reduce the particle deposition. The reaction process can be observed at the glass window 17, and meanwhile, the temperature and the humidity are monitored in real time by means of the temperature and humidity display 20 and the temperature and humidity detector 19, and the reaction conditions are recorded.

3) During the reaction process, samples are collected to the filter membrane between the stainless steel grid plates 15 in the reducer head 16 by the suction pump according to the design time period through the reducer head 16 for subsequent identification of components and other properties. Treat after whole experiment to be connected No. 2 ball valve 11's gas outlet and outside tail gas processing apparatus, open No. 2 ball valve 11, the air pump is discharged the surplus material in reaction chamber 2 to make it handle through tail gas processing apparatus, prevent to cause environmental pollution.

4) After the test is finished, the No. 1 top cover steel plate and the No. 2 top cover steel plate are opened, alcohol with the mass fraction of 50% or more is used for wiping, after the alcohol is wiped cleanly, the box body is opened and placed until the alcohol volatilizes, and the box body is sealed. And finally, opening the

ball valves

3 and 11 and the air pump of the No. 1 and the No. 2 to pump residual substances in the box body, thereby realizing cleaning again. The process can ensure that the next experimental process is not interfered by the experiment.

The following is further described by way of specific examples, but the present invention is not limited to the straw combustion used in the examples, and is also applicable to various substrate producing apparatuses.

This example is the liquid phase reaction process of using the utility model to research straw burning smog in the atmosphere.

1) The left substrate generation chamber 1 is provided with a straw incinerator, the incinerator is started after the box body is sealed, the manual spiral valve is unscrewed, the air pump is opened, and smoke generated by straw combustion is guided into the reaction chamber 2. After the reaction chamber 2 is filled with smoke, the manual screw valve and the air pump can be closed to seal the reaction chamber 2.

2) A liquid phase reaction process of straw combustion smoke in the atmosphere is simulated by using the ultraviolet light tube 18, the humidifier 22 and the fan 21, and the temperature and the humidity in the reaction chamber 2 are detected in real time by the temperature and humidity detector 19 and displayed on the temperature and humidity display 20. After reacting for a period of time, obtaining partial samples for later use through the air pump, the reducer head 16 and the sampling film in the reducer head 16, and continuously reacting the residual substances.

3) After the experiment, be connected No. 2 ball valve 11's gas outlet and outside tail gas processing apparatus, open No. 2 ball valve 11, the air pump is discharged the surplus material in reaction chamber 2 to make it handle through tail gas processing apparatus, prevent to cause environmental pollution.

4) Open No. 1 top cap steel sheet and No. 2 top cap steel sheets, use the mass fraction to wipe for 50% or above alcohol, open and place to the alcohol and volatilize, seal the incasement and reduce residue and environmental pollution. The sample obtained by detection can better react the change process of the liquid-phase reaction substance of the straw burning smoke.

The utility model discloses can be through changing electric combustion furnace in order to satisfy different experiment demands to can reduce flue gas transmission process's wall loss through manual spiral valve 7. When necessary, the substrate generation source 6 may be replaced, for example, an electric burner, a reaction vessel, or the like, and the reaction of various substrates in the atmospheric environment may be studied. And compare in the inside no substrate source of traditional smog case, can only produce the leading-in and the admission entering of gas pump of substrate rethread pipeline through the outside indoor, the utility model has the characteristics of research range is wide, the simple operation. In addition, because manual screw valve in the experimentation, the utility model provides a simulation reaction system has the little characteristics of wall loss, so can more accurate research system internal reaction.

Claims

1. A simulated atmosphere complex reaction system with a built-in substrate source is characterized by comprising a hollow rectangular stainless steel box body with an opening at the top and a closed bottom, the interior of the box body is divided into two chambers by a stainless steel partition plate, wherein the chamber positioned at the front part of the box body is a substrate generation chamber (1), the chamber positioned at the rear part of the box body is a reaction chamber (2), the middle part of the partition plate is provided with a circular through hole of the partition plate, a manual spiral valve (7) is used for opening or closing the circular through hole, the front wall of the box body is provided with a No. 1 ball valve (4) for communicating or disconnecting the substrate generation chamber (1) and the reaction chamber (2), a substrate generation source (6) for carrying out a reaction on a substrate and generating a product is arranged on the bottom plate of the box body, a feeding hole (5) is arranged on the left side plate of the box body corresponding to the bottom of the substrate generation chamber (1), a stainless steel material feeding port cover plate is arranged on the box body and used for opening or closing the feeding port (5);

a No. 2 ball valve (11) which is used for communicating or disconnecting the reaction chamber (2) with the outside of the box body is arranged on the left side wall of the box body corresponding to the bottom of the reaction chamber (2), a No. 3 ball valve (13) which is used for communicating or disconnecting the reaction chamber (2) with the outside of the box body is arranged on the rear wall of the box body, a transversely arranged ultraviolet light lamp tube (18) is fixed on the inner surface of the right side wall of the box body, a transversely arranged lamp tube (18) is also fixed on the inner surface of the rear wall of the box body, a glass window (17) which is used for observing the inside of the reaction chamber (2) is arranged on the left side wall of the box body corresponding to the middle part of the reaction chamber (2), a temperature and humidity detector (19) is arranged in the reaction chamber (2), a temperature and humidity display (20) which is connected with the temperature and humidity detector (19) is arranged on the outside of, the outer surface of the rear wall of the box body is provided with a distribution box (24), the two lamp tubes (18), the temperature and humidity detector (19), the fan (21) and the humidifier (22) are connected with the distribution box (24) through electric wires in a stainless steel line pipe penetrating through the rear wall of the box body, the pipe wall of the stainless steel line and the rear wall of the box body are fixed and sealed in a welding mode, the rear wall of the box body is provided with a sampling device, the sampling device is communicated with a gas collecting box through an air suction pump, an opening of the substrate generation chamber (1) is combined and sealed through a No. 1 top cover steel plate cover, and an opening of the reaction chamber (2) is combined and sealed through a No. 2 top cover steel plate cover.

2. The atmosphere simulation complex reaction system with a built-in substrate source as claimed in claim 1, wherein the upper part of the back wall of the box body is provided with a No. 5 threaded interface (14) with a through hole structure with internal threads, the sampling device is a hollow stainless steel variable head (16) with the front diameter larger than the back diameter, the large diameter section of the variable head (16) is provided with external threads, the large diameter section of the variable head (16) is in threaded connection with the No. 5 threaded interface (14), two stainless steel grid plates (15) are arranged in the large diameter section of the variable head (16), a sampling membrane is arranged between the two stainless steel grid plates (15), the opening of the small diameter section of the variable head (16) is connected with the air inlet of the air suction pump, and the air outlet of the air suction pump is communicated with the gas collection box.

3. The simulated atmosphere complex reaction system with the built-in substrate source as claimed in claim 1, wherein the front wall of the box body is provided with a No. 1 threaded interface (3) with a through hole structure with internal threads, the air inlet of the No. 1 ball valve (4) is provided with external threads, and the air inlet of the No. 1 ball valve (4) is in threaded connection with the No. 1 threaded interface (3); a No. 2 threaded connector (10) with an internal thread through hole structure is arranged on the left side wall of the box body corresponding to the bottom of the reaction chamber (2), an air inlet of a No. 2 ball valve (11) is provided with an external thread, and an air inlet of the No. 2 ball valve (11) is in threaded connection with the No. 2 threaded connector (10); the rear wall of the box body is provided with a No. 3 threaded connector (12) with an internal thread through hole structure, an air inlet of a No. 3 ball valve (13) is provided with an external thread, an air inlet of the No. 3 ball valve (13) is in threaded connection with the No. 3 threaded connector (12), and an air outlet of the No. 3 ball valve (13) is connected with an air pump.

4. The atmosphere simulating complex reaction system with built-in substrate source as claimed in claim 1, wherein the front wall of the box body has an internally threaded through hole, the center of the internally threaded through hole and the center of the circular through hole of the partition are on the same horizontal line, the manual screw valve (7) comprises a disk-shaped rotating hand wheel (25) with a handle, the rotating hand wheel (25) is fixedly connected with a disk-shaped flange (27) through a lead screw (26) with external threads, the diameter of the flange (27) is larger than that of the circular through hole of the partition, the lead screw (26) is in threaded connection with the internally threaded through hole, the middle part of the lead screw (26) is in threaded connection with a sleeve (29) with internal threads, the internally threaded sleeve (29) is fixedly connected with a support rod (28), and the support rod (28) is perpendicular to the lead screw (26) and is on the same horizontal plane, two ends of the supporting rod (28) are respectively fixed on the inner surface of the left side wall of the box body and the milk surface of the right side wall of the box body, and a Teflon sealing gasket which plays a role in sealing is fixedly arranged on the disk surface of the flange plate (27) which is in contact with the partition plate.

5. The atmosphere simulating complex reaction system with built-in substrate source as claimed in claim 1, wherein the substrate generating source (6) is an electric burner or a reaction vessel, when the substrate generating source (6) is an electric burner, the electric burner is connected to the distribution box 25 through wires in a stainless steel pipeline passing through the partition and the back wall of the box, and the wall of the stainless steel pipeline is fixed and sealed with the partition and the back wall of the box by welding.

6. The system according to claim 1, wherein the lower surface of the top cover steel plate No. 1 and the lower surface of the top cover steel plate No. 2 are provided with a Teflon sealing gasket for sealing, the top cover steel plate No. 1 is connected and screwed with the box body and the partition plate by stainless steel screws, and the top cover steel plate No. 2 is connected and screwed with the box body and the partition plate by stainless steel screws.

7. The simulated atmosphere complex reaction system with a built-in substrate source as claimed in claim 1, wherein a Teflon sealing gasket for sealing is arranged on the surface of the feed port cover plate, which is attached to the box body, and the feed port cover plate and the box body are connected and screwed by stainless steel screws.

8. The atmosphere simulation complex reaction system with the built-in substrate source as claimed in claim 1, wherein a circular through hole (8) is formed in the No. 2 top cover steel plate, the temperature and humidity detector (19) penetrates through the circular through hole (8) and extends into the reaction chamber (2), and a sealing ring (9) for sealing is arranged between the temperature and humidity detector (19) and the circular through hole.

9. The simulated atmosphere complex reaction system with built-in substrate source as claimed in claim 1, wherein the volume ratio of the substrate generation chamber (1) to the reaction chamber (2) is 1: 3.

10. the complex reaction system for simulating atmosphere with built-in substrate source as claimed in claim 1, wherein each of four corners of the bottom surface of the box body bottom plate is provided with a universal wheel (23) with a foot brake.