Multi-scale volatile organic compound generator

Abstract

The invention belongs to the technical field of waste gas environment-friendly treatment, and particularly relates to a multi-scale volatile organic compound generator which comprises a shell and further comprises a heating mechanism, a siphon nozzle is fixedly arranged at the input end of the side wall of the heating mechanism, a peristaltic pump is fixedly arranged on the outer side wall of the shell, and a liquid inlet pipe is fixedly arranged at the output end of the peristaltic pump; the end, away from the peristaltic pump, of the liquid inlet pipe is fixedly connected with the siphon nozzle. The carrier gas flow and the heating temperature can be accurately controlled, a stable high-temperature environment is provided for organic matter evaporation, and full contact of hot carrier gas and organic matter is guaranteed; meanwhile, accurate and constant supply of trace organic matters can be realized, and the problem of high concentration or fluctuation is avoided; and the airflow contact path and angle can be dynamically adjusted according to the introduction amount of the organic matter, the gas-liquid contact effect is optimized, accumulation or insufficient contact of organic matter liquid drops is prevented, airflow stability is ensured, and finally long-time stable output of low-concentration organic matter steam is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of waste gas environmental protection treatment, and particularly relates to a multi-scale volatile organic matter generator. BACKGROUND

[0002] With the rapid development of the industrial industry, volatile organic compounds (VOCs) generated in the production process have become one of the important factors affecting indoor and outdoor air quality. The VOCs emitted by the industrial industry have a significant "multi-scale" characteristic. From the concentration dimension, the VOCs release concentration is obviously different under different production processes. The concentration is relatively low in low-pollution processes, and the concentration of VOCs is greatly increased in high-pollution processes due to raw material pyrolysis, solvent evaporation and chemical reaction by-products. From the component dimension, the industrial VOCs are complex and contain benzene series, halogenated hydrocarbons, esters, ethers and other organic matters. Such VOCs components with environmental persistence and potential health risks become the objects that need to be focused on in the process of precise treatment, monitoring and related technical research of industrial VOCs, such as the volatile organic compound waste gas treatment device disclosed in the announcement No. CN105879591A.

[0003] In order to realize the effective treatment, analysis or related technical verification of industrial source VOCs, the industry gradually adopts the technical idea of "heating evaporation + hot carrier gas carrying": liquid VOCs are converted into gaseous steam by heating, and then the VOCs steam is separated from the mixed system and output in a specific direction by means of hot carrier gas, so as to provide a stable gas source for subsequent VOCs recovery, degradation or concentration calibration. However, the current mainstream VOCs generator has obvious technical limitations in the design of the liquid supply system. It generally relies on a peristaltic pump to complete VOCs transportation. Due to the performance limitation of the existing peristaltic pump product, the minimum transportation flow is difficult to meet the needs of low-concentration scenes. In actual application, a larger flow is often used (the minimum flow of the peristaltic pump on the market is 50 μL / min, and ml / min flow is often used). When it is necessary to simulate the actual working condition of low-concentration VOCs in industrial emissions or to provide a low-concentration standard gas source for detection equipment, the carrier gas flow needs to be controlled at a low level. After a large amount of VOCs input by the peristaltic pump is volatilized by heating, the VOCs concentration in the carrier gas is far higher than the actual level in the industrial scene, and the real pollution environment cannot be accurately reproduced. At the same time, large-flow transportation is easy to cause the problem of insufficient evaporation of VOCs. The liquid VOCs that are not completely vaporized may be output together with the steam, causing the concentration of the gas source to fluctuate, which not only affects the reliability of the test results of the subsequent treatment technology, but also is difficult to meet the strict requirements of concentration stability for detection instrument calibration.

[0004] Therefore, a multi-scale volatile organic matter generator is provided. SUMMARY

[0005] The application aims at the above problems, and provides a multi-scale volatile organic matter generator.

[0006] To achieve the above object, the application adopts the following technical scheme: a multi-scale volatile organic matter generator, comprising a shell, further comprising:

[0007] A heating mechanism is fixedly arranged in the interior of the shell, a siphon nozzle is fixedly arranged on the side wall of the heating mechanism, a peristaltic pump is fixedly arranged on the outer side wall of the shell, an output end of the peristaltic pump is fixedly arranged with a liquid inlet pipe, one end of the liquid inlet pipe away from the peristaltic pump is fixedly connected with the siphon nozzle, and a first air inlet pipe extending to the outside of the shell is fixedly arranged on the side wall of the siphon nozzle.

[0008] An evaporation mechanism is fixedly arranged in the interior of the shell, a gas guide pipe is fixedly arranged between the heating mechanism and the evaporation mechanism, a carrier gas mass flow meter is fixedly arranged on the pipe wall of the gas guide pipe, an air outlet pipe is fixedly arranged on the top of the evaporation mechanism, and the end of the air outlet pipe extends to the outside of the shell.

[0009] An injection pump is fixedly arranged on the outer side wall of the shell, a third liquid inlet pipe is fixedly arranged between the output end of the injection pump and the top of the evaporation mechanism, an organic matter mass flow meter is fixedly arranged on the pipe wall of the third liquid inlet pipe, a concentric atomizer is fixedly arranged on the pipe wall of the third liquid inlet pipe, and a second air inlet pipe extending to the outside of the shell is fixedly arranged on one end of the concentric atomizer.

[0010] A PLC controller is fixedly arranged in the interior of the shell, and the heating mechanism, the peristaltic pump, the evaporation mechanism, the carrier gas mass flow meter, the injection pump and the organic matter mass flow meter are electrically connected with the PLC controller.

[0011] Preferably, the heating mechanism comprises a heating box fixedly arranged in the interior of the shell, two groups of heating pipes are fixedly arranged in the interior of the heating box, a temperature sensor is fixedly arranged on the top of the heating box, and the detection end of the temperature sensor extends to the interior of the heating box.

[0012] Preferably, the evaporation mechanism comprises an evaporation box fixedly arranged in the interior of the shell, one end of the gas guide pipe extends to the upper side of the interior of the evaporation box and is fixedly arranged with a first cross pipe, a plurality of branch pipes uniformly distributed are fixedly arranged on the upper side of the pipe wall of the first cross pipe, one end of the third liquid inlet pipe extends to the lower side of the interior of the evaporation box and is fixedly arranged with a second cross pipe, and a plurality of branch pipes uniformly distributed are fixedly arranged on the lower side of the pipe wall of the second cross pipe.

[0013] Preferably, the interior of the evaporator is provided with a plurality of evenly distributed guide plates at an incline, and a rotating shaft is fixedly provided in the middle of each of the plurality of guide plates. The two ends of the rotating shaft are respectively rotatably connected to the inner walls of the two sides of the evaporator. The outer wall of the evaporator is provided with an angle adjustment mechanism connected to one end of the plurality of rotating shafts.

[0014] Preferably, the angle adjustment mechanism includes a protective cover fixedly mounted on the outer wall of the evaporator, a motor fixedly mounted on the outer wall of the protective cover, one end of each of the plurality of rotating shafts extending into the interior of the protective cover and each fixedly mounted with a sprocket, the plurality of sprockets meshing and driving each other with the same chain, and the output end of the motor being fixedly connected to one end of one of the rotating shafts.

[0015] Preferably, the motor is a self-locking motor, and the guide plate is made of high-temperature resistant aluminum alloy plate.

[0016] Preferably, a switching power supply and a single-phase fully isolated AC voltage regulator module are fixedly installed inside the housing, and a central control screen is fixedly installed on the outer wall of the housing. The switching power supply, the single-phase fully isolated AC voltage regulator module, and the central control screen are all electrically connected to the PLC controller.

[0017] Compared with existing technologies, the advantages of this invention are as follows:

[0018] 1. A peristaltic pump, in conjunction with a siphon nozzle, ensures stable liquid introduction and atomization to form a carrier gas. Combined with precise power adjustment by a PLC controller, the carrier gas input flow rate can be flexibly controlled according to actual needs, solving the problem of mismatch between carrier gas supply and operating conditions in traditional equipment. 2. Two sets of heating tubes in the heating mechanism work together, with real-time feedback from a temperature sensor, to stably heat the carrier gas to 150℃, with temperature fluctuations controlled within a reasonable range, providing a continuous and stable high-temperature heat source for organic matter evaporation. 3. The evaporation mechanism, through the diversion design of the first horizontal pipe and branch pipes, allows the hot carrier gas to be evenly blown to the bottom of the guide plate, achieving both uniform preheating of the guide plate and maintaining a stable temperature above 100℃ inside the evaporation chamber, creating an optimal environment for organic matter evaporation.

[0019] 2. By using a syringe pump instead of a traditional peristaltic pump, a small but constant flow rate can be output, perfectly meeting the simulation requirements of low-concentration organic matter from industrial sources. This solves the problem of excessively high organic matter concentration caused by the excessive minimum flow rate of traditional peristaltic pumps. Combined with real-time detection by an organic matter mass flow meter and closed-loop control by a PLC controller, the amount of liquid organic matter introduced can be accurately controlled, ensuring that the organic matter supply accuracy meets application requirements. This allows the generator to stably produce low-concentration gaseous organic matter, accurately reproducing actual pollution scenarios in industrial sectors and providing a standardized low-concentration gas source for the calibration of detection equipment and the development of treatment technologies, avoiding concentration distortion caused by excessive or fluctuating organic matter supply.

[0020] 3. By setting up guide plates and an angle adjustment mechanism, the guide plates are made of high-temperature resistant aluminum alloy and are arranged at an angle inside the evaporation chamber, which extends the contact path between the atomized organic droplets and the hot carrier gas, and increases the gas-liquid contact area, promoting the rapid and full evaporation of organic droplets; the angle adjustment mechanism realizes the synchronous angle adjustment of multiple guide plates through the linkage design of motor, sprocket and chain, and can adaptively match the organic matter flow rate under the control of PLC controller. Attached Figure Description

[0021] Figure 1 This is a first-view perspective perspective of a multi-scale volatile organic compound generator provided by the present invention;

[0022] Figure 2 This is a second-view perspective perspective of a multi-scale volatile organic compound generator provided by the present invention;

[0023] Figure 3 This is a perspective view of a multi-scale volatile organic compound generator provided by the present invention;

[0024] Figure 4 This is a perspective view of the heating mechanism in a multi-scale volatile organic compound generator provided by the present invention;

[0025] Figure 5 This is a perspective view of the evaporation mechanism in a multi-scale volatile organic compound generator provided by the present invention.

[0026] In the diagram: 1. Housing; 2. Heating mechanism; 21. Heating box; 22. Heating tube; 23. Temperature sensor; 3. Peristaltic pump; 4. Liquid inlet pipe; 5. First air inlet pipe; 6. Evaporation mechanism; 61. Evaporation box; 62. First horizontal pipe; 63. Branch pipe; 64. Second horizontal pipe; 65. Branch pipe; 66. Guide plate; 67. Rotating shaft; 68. Angle adjustment mechanism; 681. Protective cover; 682. Motor; 683. Sprocket; 684. Chain; 7. Air guide pipe; 8. Carrier gas mass flow meter; 9. Air outlet pipe; 10. Injection pump; 11. Third liquid inlet pipe; 12. Organic matter mass flow meter; 13. PLC controller; 14. Siphon nozzle; 15. Switching power supply; 16. Single-phase fully isolated AC voltage regulating module; 17. Central control screen; 18. Concentric atomizer; 19. Second air inlet pipe. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] like Figures 1-5 As shown, a multi-scale volatile organic compound generator includes a housing 1, and further includes:

[0029] The heating mechanism 2 has a siphon nozzle 14 fixedly installed at the input end of its side wall, a peristaltic pump 3 fixedly installed on the outer side wall of the housing 1, an inlet pipe 4 fixedly installed at the output end of the peristaltic pump 3, and an end of the inlet pipe 4 away from the peristaltic pump 3 fixedly connected to the siphon nozzle 14. A first air inlet pipe 5 extending to the outside of the housing 1 is fixedly installed on the side wall of the siphon nozzle 14. The heating mechanism 2 includes a heating box 21 fixedly installed inside the housing 1. Two sets of heating tubes 22 are fixedly installed inside the heating box 21. A temperature sensor 23 is fixedly installed on the top of the heating box 21, and the detection end of the temperature sensor 23 extends into the interior of the heating box 21. The temperature sensor 23 can detect the heating temperature of the heating tubes 22 in real time.

[0030] An evaporation mechanism 6 is fixedly installed inside the housing 1. A gas guide pipe 7 is fixedly installed between the heating mechanism 2 and the evaporation mechanism 6. A carrier gas mass flow meter 8 is fixedly installed on the wall of the gas guide pipe 7. An outlet pipe 9 is fixedly installed at the top of the evaporation mechanism 6, and the end of the outlet pipe 9 extends to the outside of the housing 1. The evaporation mechanism 6 includes an evaporation chamber 61 fixedly installed inside the housing 1. One end of the gas guide pipe 7 extends to the upper inside of the evaporation chamber 61 and is fixedly installed with a first horizontal pipe 62. Multiple evenly distributed branch pipes 63 are fixedly installed on the upper wall of the first horizontal pipe 62, which can evenly guide the hot carrier gas to the bottom of the evaporation chamber 61. One end of the third liquid inlet pipe 11 extends to the lower inside of the evaporation chamber 61 and is fixedly installed with a second horizontal pipe 64. Multiple evenly distributed branch pipes 65 are fixedly installed on the lower wall of the second horizontal pipe 64. Multiple evenly distributed guide plates 66 are inclined inside the evaporation chamber 61. The baffle plate 66 is made of high-temperature resistant aluminum alloy plate. The high-temperature resistant aluminum alloy material has strong thermal conductivity and high structural strength. The middle of each of the multiple baffle plates 66 is fixed with a rotating shaft 67, and the two ends of the rotating shaft 67 are respectively rotatably connected to the inner walls of the two sides of the evaporator 61. The outer wall of the evaporator 61 is provided with an angle adjustment mechanism 68 connected to one end of the multiple rotating shafts 67. The angle adjustment mechanism 68 includes a protective cover 681 fixedly set on the outer wall of the evaporator 61. A motor 682 is fixedly set on the outer wall of the protective cover 681. The motor 682 is a self-locking motor. After the motor 682 stops, it can automatically lock the output shaft to improve the stability of the angle tilt of the baffle plate 66. One end of each of the multiple rotating shafts 67 extends into the interior of the protective cover 681 and is fixedly provided with a sprocket 683. The multiple sprockets 683 are meshed and driven by the same chain 684. The output end of the motor 682 is fixedly connected to one end of one of the rotating shafts 67.

[0031] An injection pump 10 is fixedly mounted on the outer wall of the housing 1. A third inlet pipe 11 is fixedly provided between the output end of the injection pump 10 and the top of the evaporation mechanism 6. An organic matter mass flow meter 12 is fixedly provided on the wall of the third inlet pipe 11. A concentric atomizer 18 is fixedly provided on the wall of the third inlet pipe 11. A second air inlet pipe 19 extending to the outside of the housing 1 is fixedly provided at one end of the concentric atomizer 18. The injection pump 10 can inject liquid organic matter into the third inlet pipe 11 at a constant and controllable small flow rate. At the same time, the organic matter mass flow meter 12 can detect the amount of liquid organic matter entering. Simultaneously, through the concentric atomization principle of the concentric atomizer 18, the liquid organic matter is atomized by the airflow in the concentric atomization tube and enters the evaporation chamber 61.

[0032] The PLC controller 13 is fixedly installed inside the housing 1. The heating mechanism 2, peristaltic pump 3, evaporation mechanism 6, carrier gas mass flow meter 8, injection pump 10, and organic matter mass flow meter 12 are all electrically connected to the PLC controller 13. The housing 1 is also fixedly equipped with a switching power supply 15 and a single-phase fully isolated AC voltage regulator module 16. The housing 1 is also fixedly equipped with a central control panel 17 on its outer wall. The switching power supply 15, the single-phase fully isolated AC voltage regulator module 16, and the central control panel 17 are all electrically connected to the PLC controller 13. The switching power supply 15 can efficiently convert electrical energy and stabilize the output voltage, adapting to the power supply needs of multiple components in the equipment, reducing energy consumption and space occupation, and ensuring the stable operation of precision components. The single-phase fully isolated AC voltage regulator module 16 can accurately adjust the power of components such as the heating tube 22 and the motor 682, isolate strong and weak currents to avoid interference and safety risks, adapt to process temperature control and drive requirements, and simplify control logic.

[0033] The operating principle of the present invention is described as follows: The operator first initiates a start command through the central control screen 17, triggering the peristaltic pump 3 and the heating tube 22 to run synchronously. The PLC controller 13 then intervenes, precisely adjusting the output power of the peristaltic pump 3 to match the preset working conditions. At the same time, the target heating temperature of the heating tube 22 is set to 150°C and the constant temperature control program is started. Driven by the peristaltic pump 3, the liquid outside the shell 1 is introduced into the shell 1 through the first air pipe 4, the siphon nozzle 14 and the first air inlet pipe 5 and then atomized to form a carrier gas, which is then discharged into the heating box 21. The carrier gas flows through the heating box 21 at a preset constant flow rate and rapidly heats up under the continuous heating action of the heating tube 22, eventually reaching about 150°C, which is the same as the temperature set by the heating tube 22. This temperature is fed back to the PLC controller 13 in real time through the temperature sensor 23 built into the heating box 21 to ensure that the fluctuation is controlled within the allowable range.

[0034] The hot carrier gas, heated to 150°C, is directed into the evaporator 61 via the gas guide pipe 7. Simultaneously, the carrier gas mass flow meter 8 mounted on the gas guide pipe 7 monitors and provides feedback on the actual flow rate of the hot carrier gas in real time. The data is displayed synchronously on the central control screen 17 for real-time monitoring by the staff. After the hot carrier gas enters the evaporator 61, it forms a uniformly distributed airflow channel through the first horizontal pipe 62 and branch pipe 63 pre-set inside the evaporator 61. The airflow blows vertically towards the bottom of multiple guide plates 66 inside the evaporator 61, which on the one hand achieves uniform preheating of the guide plates 66, and on the other hand continuously creates a stable high-temperature environment inside the evaporator 61, ultimately bringing the temperature inside the evaporator 61 close to 150°C, providing sufficient heat for the evaporation of organic matter.

[0035] After the temperature of the evaporator 61 reaches the preset threshold and stabilizes, the operator starts the injection pump 10 via the central control screen 17. Under the precise control of the PLC controller 13, the injection pump 10 injects liquid organic matter into the system at a constant and controllable small flow rate. The liquid organic matter is transported to the top of the evaporator 61 through the third inlet pipe 11. The liquid organic matter mass flow meter 12 on the third inlet pipe 11 detects and records the amount of organic matter entering in real time. At the same time, through the concentric atomization principle of the concentric atomizer 18, the liquid organic matter is atomized by the airflow in the concentric atomizing tube and enters the evaporator 61. After the organic matter arrives at the top of the evaporator 61, it is diverted to multiple branch pipes 65 through the pre-installed second horizontal pipe 64. The organic matter flows vertically downward through the branch pipes 65 toward multiple guide plates 66. At this time, the 150°C hot carrier gas continuously blown at the bottom of the guide plate 66 comes into full contact with the atomized organic matter droplets. The heat of the hot carrier gas is quickly transferred to the surface of the droplets, causing the atomized organic matter to evaporate instantly in the high-temperature environment and completely transform into gaseous organic matter. Finally, the gaseous organic matter is driven by the airflow to converge to the gas outlet pipe 9 at the top of the evaporator 61 and discharged outward in a directional manner to enter the subsequent use or treatment stage.

[0036] During the introduction of liquid organic matter, the organic matter mass flow meter 12 on the third inlet pipe 11 collects the liquid organic matter introduction volume data in real time and transmits the signal synchronously to the PLC controller 13. The PLC controller 13 analyzes and calculates the organic matter introduction volume value in real time through a preset flow matching algorithm, and then dynamically adjusts the output power of the peristaltic pump 3. When the organic matter introduction volume increases, the power of the peristaltic pump 3 is increased accordingly to increase the supply of hot carrier gas. When the organic matter introduction volume decreases, the power of the peristaltic pump 3 is reduced to reduce the output of hot carrier gas, ensuring that the amount of hot carrier gas introduced into the evaporation tank 61 and the amount of liquid organic matter are always accurately matched, providing "on-demand" heat and airflow conditions for organic matter evaporation.

[0037] On the one hand, sufficient heat carrier gas ensures that each atomized organic droplet receives enough heat, avoiding incomplete evaporation of droplets due to insufficient heat carrier gas, which could lead to residual or localized accumulation of liquid organic matter. On the other hand, the matched gas-liquid ratio maintains the stability of the airflow field within the evaporation chamber 61, ensuring uniform concentration of gaseous organic matter and meeting subsequent requirements for the accuracy of gaseous organic matter concentration. At the same time, this design effectively avoids two key problems: first, insufficient heat carrier gas leads to low evaporation efficiency and excessive fluctuations in vapor concentration, affecting subsequent application effects; second, excessive heat carrier gas results in energy waste and excessively fast airflow that washes away atomized droplets, causing uneven local concentrations.

[0038] During this process, the PLC controller 13 automatically starts the motor 682 based on the organic matter inlet data and precisely controls the rotation angle of the motor 682 through pulse signals. When the motor 682 is running, it drives one of the rotating shafts 67 to rotate synchronously. Since the multiple rotating shafts 67 in the evaporator 61 are connected by a sprocket 683 and a chain 684 to form a linkage transmission structure, the rotational power of one rotating shaft 67 will be synchronously transmitted to all rotating shafts 67, thereby driving the guide plate 66 on each rotating shaft 67 to synchronously adjust its tilt angle, realizing the adaptive dynamic matching between the angle of the guide plate 66 and the organic matter inlet. The greater the organic matter inlet, the greater the demand for hot carrier gas, and the greater the tilt angle of the guide plate 66. The benefits of adaptive angle adjustment are reflected in two aspects:

[0039] Firstly, increasing the tilt angle of the guide plate by 66 can shorten the residence time of atomized organic droplets on the plate surface, preventing the droplets from accumulating and forming a thick liquid film that would affect the evaporation efficiency. At the same time, it allows the newly added organic droplets to quickly come into contact with more hot carrier gas, thus improving the sufficiency of gas-liquid heat exchange.

[0040] Secondly, with the increased tilt angle, the angle between the guide plate 66 and the direction of the hot carrier gas flow becomes gentler, which reduces airflow resistance and guides the hot carrier gas to form a more stable deflection path. This ensures that the airflow evenly covers all atomized droplets, avoiding incomplete evaporation or fluctuations in steam concentration due to airflow turbulence. In addition, the design of synchronous linkage adjustment of multiple guide plates 66 can ensure that the airflow distribution and heat exchange conditions in each area of ​​the evaporator 61 are consistent, further improving the concentration stability and output uniformity of gaseous organic matter.

[0041] The above description is only a preferred 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 within the protection scope of the present invention.

Claims

1. A multi-scale volatile organic compound generator, comprising a housing (1), characterized in that, Also includes: A heating mechanism (2) is fixedly installed inside the housing (1). A siphon nozzle (14) is fixedly provided at the input end of the side wall of the heating mechanism (2). A peristaltic pump (3) is fixedly provided on the outer side wall of the housing (1). An inlet pipe (4) is fixedly provided at the output end of the peristaltic pump (3). The end of the inlet pipe (4) away from the peristaltic pump (3) is fixedly connected to the siphon nozzle (14). A first air inlet pipe (5) extending to the outside of the housing (1) is fixedly provided on the side wall of the siphon nozzle (14). An evaporation mechanism (6) is fixedly installed inside the housing (1). A gas guide pipe (7) is fixedly provided between the heating mechanism (2) and the evaporation mechanism (6). A carrier gas mass flow meter (8) is fixedly provided on the wall of the gas guide pipe (7). An outlet pipe (9) is fixedly provided on the top of the evaporation mechanism (6), and the end of the outlet pipe (9) extends to the outside of the housing (1). An injection pump (10) is fixedly installed on the outer wall of the housing (1). A third liquid inlet pipe (11) is fixedly provided between the output end of the injection pump (10) and the top of the evaporation mechanism (6). An organic mass flow meter (12) is fixedly provided on the wall of the third liquid inlet pipe (11). A concentric atomizer (18) is fixedly provided on the wall of the third liquid inlet pipe (11), and a second air inlet pipe (19) extending to the outside of the housing (1) is fixedly provided at one end of the concentric atomizer (18). The PLC controller (13) is fixedly installed inside the housing (1). The heating mechanism (2), peristaltic pump (3), evaporation mechanism (6), carrier gas mass flow meter (8), injection pump (10) and organic matter mass flow meter (12) are all electrically connected to the PLC controller (13).

2. The multi-scale volatile organic compound generator according to claim 1, characterized in that, The heating mechanism (2) includes a heating box (21) fixedly installed inside the housing (1). Two sets of heating tubes (22) are fixedly installed inside the heating box (21). A temperature sensor (23) is fixedly installed on the top of the heating box (21), and the detection end of the temperature sensor (23) extends into the interior of the heating box (21).

3. A multi-scale volatile organic compound generator according to claim 1, characterized in that, The evaporation mechanism (6) includes an evaporation chamber (61) fixedly disposed inside the housing (1). One end of the gas guide pipe (7) extends to the upper inside of the evaporation chamber (61) and is fixedly provided with a first horizontal pipe (62). Multiple evenly distributed branch pipes (63) are fixedly provided on the upper side of the pipe wall of the first horizontal pipe (62). One end of the third liquid inlet pipe (11) extends to the lower inside of the evaporation chamber (61) and is fixedly provided with a second horizontal pipe (64). Multiple evenly distributed branch pipes (65) are fixedly provided on the lower side of the pipe wall of the second horizontal pipe (64).

4. A multi-scale volatile organic compound generator according to claim 3, characterized in that, The evaporator (61) is provided with a plurality of evenly distributed guide plates (66) at an incline. A rotating shaft (67) is fixedly provided in the middle of each of the plurality of guide plates (66), and the two ends of the rotating shaft (67) are respectively rotatably connected to the inner walls of the two sides of the evaporator (61). The outer wall of the evaporator (61) is provided with an angle adjustment mechanism (68) connected to one end of the plurality of rotating shafts (67).

5. A multi-scale volatile organic compound generator according to claim 4, characterized in that, The angle adjustment mechanism (68) includes a protective cover (681) fixedly installed on the outer wall of the evaporator (61). A motor (682) is fixedly installed on the outer wall of the protective cover (681). One end of each of the plurality of rotating shafts (67) extends into the interior of the protective cover (681) and is fixedly provided with a sprocket (683). The plurality of sprockets (683) are meshed and driven by the same chain (684). The output end of the motor (682) is fixedly connected to one end of one of the rotating shafts (67).

6. A multi-scale volatile organic compound generator according to claim 5, characterized in that, The motor (682) is a self-locking motor, and the guide plate (66) is made of high-temperature resistant aluminum alloy plate.

7. A multi-scale volatile organic compound generator according to claim 1, characterized in that, The housing (1) is fixedly equipped with a switching power supply (15) and a single-phase fully isolated AC voltage regulator module (16). The outer wall of the housing (1) is fixedly equipped with a central control screen (17). The switching power supply (15), the single-phase fully isolated AC voltage regulator module (16) and the central control screen (17) are all electrically connected to the PLC controller (13).

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