A high-humidity flue gas generation system for laboratory use and its control method

Abstract

This application discloses a high-humidity flue gas generation system and its control method for laboratory use, belonging to the field of flue gas regulation technology. The system includes a housing, an exhaust pipe, a high-humidity gas generation component, a standard gas mixing module, and a control module. The high-humidity gas generation component contains multiple modules with independently configurable positions and parameters for generating and outputting high-humidity gas with set parameters. The standard gas mixing module contains at least two jet nozzles and a supply regulator arranged alternately along the exhaust pipe for mixing in standard gas. The control module is connected to the above components and adjusts their actions by outputting control signals to control the flue gas parameters. In the above solution, the working position and working parameters of each gas component generation module in the high-humidity gas generation component are independently controlled. By combining different working positions with different working parameters, multiple high-humidity gases with different parameters can be generated uniformly and stably, with high reliability and adaptability to different application scenarios and needs.

Description

Technical Field

[0001] This application belongs to the field of flue gas control technology, and relates to a high-humidity flue gas generation system for laboratory use and its control method. Background Technology

[0002] Monitoring organized emissions of pollutants such as particulate matter, sulfur dioxide, and nitrogen oxides is a crucial task in the field of atmospheric environmental monitoring. Both training monitoring personnel and calibrating and testing related monitoring instruments require flue gas generation devices to produce "exhaust gas" with set parameters for testing. Especially for performance testing of some precision exhaust gas monitoring devices, an artificial smoke generation system that outputs stable and uniform smoke parameters that closely approximates real exhaust gas parameters is essential. Summary of the Invention

[0003] To address the challenge of generating flue gas that is difficult to stably, uniformly, and controllably resemble organized emissions in practical applications, this application aims to provide a high-humidity flue gas generation system for laboratory use. Through a simple structural design, this system can precisely control the composition of the generated flue gas while ensuring the uniformity and stability of the output flue gas. This significantly improves the testing accuracy of related instruments and equipment, and also assists in the training of relevant monitoring personnel, reducing training costs and improving training efficiency. Based on the aforementioned high-humidity flue gas generation system for laboratory use, this application also aims to provide a control method for such a system. This method achieves stable and continuous output of flue gas by real-time sampling and analysis of the generated flue gas and feedback adjustment of control parameters. The specific scheme is as follows: A high-humidity flue gas generation system for laboratory use includes a casing and an exhaust pipe connected thereto, and further includes: The high-humidity gas generating component includes multiple gas component generating modules with independently configurable working positions and working parameters, used to generate high-humidity gas with set parameters and output it from the exhaust pipe; The standard gas mixing module includes at least two jet nozzles arranged alternately along the length of the exhaust pipe and a standard gas supply regulating component connected thereto, for mixing standard gas into the exhaust pipe; The control module is configured to be connected to the high-humidity gas generating component and the standard gas mixing module for control, and outputs control signals to control the operation of the high-humidity gas generating component and / or the standard gas mixing module in order to control the parameters of the output flue gas. The parameters corresponding to the output flue gas include: flue gas temperature, flue gas humidity, flue gas velocity, flue gas pressure, water mist particle size in the flue gas, and one or more combinations of the concentration of gaseous pollutants and particulate pollutants of a set type in the flue gas. The control module includes: The standard control module is configured to output control signals according to a set of control commands; or The intelligent control module is configured to acquire parameter data of the flue gas output from the exhaust pipe, and automatically adjust the control parameters of the high-humidity gas generation component and / or the standard gas mixing module according to the target parameters, and output control signals to keep the difference between the parameters of the output flue gas and the target parameters within the set range.

[0004] The above technical solution generates and mixes high-humidity gas (the base gas) inside the casing, and then mixes it with standard gas (polluting gas, such as sulfur-containing gas) in the exhaust pipe. This results in a more uniform and controllable mixture of the generated flue gas. Compared to flue gas generating devices with fixed positions and operating parameters, the operating positions and parameters of each gas component generating module in this solution are independently controlled. By combining different operating parameters with different operating positions, various high-humidity gases with different parameters can be generated. When using intelligent control mode, even if the operating parameter control fails, the output parameters can still be adjusted by changing the operating position based on the fixed operating parameters. This ensures high reliability, adaptability to different application scenarios and needs, and guarantees the uniformity and stability of the output flue gas. Mixing standard gas into the exhaust pipe effectively avoids pollutant particles, such as sulfur-containing particles, from contaminating and corroding the inside of the casing, facilitating the reuse of the equipment.

[0005] Furthermore, the gas component generation module includes: A hot steam generating module includes a heating water tank installed inside a housing. The heating water tank is equipped with an electric heating element, a water temperature sensor, and a first liquid level sensor. A drain outlet is provided at the bottom of the water tank. The electric heating element is connected to a control module, and the water temperature sensor and the first liquid level sensor are connected to the control module via signal connection. A room temperature atomizing module includes an atomizing water tank and an ultrasonic atomizer fixedly installed inside a housing. A second liquid level sensor is installed in the atomizing water tank. The ultrasonic atomizer is connected to a control module. The second liquid level sensor is connected to the control module. A drain outlet is provided at the bottom of the atomizing water tank. The fan module includes a turbine fan installed at the air inlet on the casing and a wind speed sensor located at the end of the exhaust pipe. The wind speed sensor is signal-connected to the control module, and the turbine fan is control-connected to the control module to control the airflow speed in the exhaust pipe. The smoke generating module includes a smoke generator connected to the air intake of a turbine fan via an external air duct, which is used to output the smoke generated when the smoke-generating material is burned into the housing. The water replenishment module includes a first water replenishment pipe and a second water replenishment pipe that are respectively connected to the heating water tank and the atomizing water tank. Both the first water replenishment pipe and the second water replenishment pipe are equipped with peristaltic pumps, and the peristaltic pumps are controlled and connected to the control module. The ultrasonic atomizer is configured in multiple ways, and the electric heating tube and turbine fan are configured in at least one way.

[0006] Through the above technical solution, the control module can independently and precisely control each functional module inside the casing, which is conducive to the precise adjustment of the parameters of the output flue gas.

[0007] Furthermore, multiple ultrasonic atomizers are arranged side by side and located below the heating water tank, or are arranged in an alternating manner adjacent to the heating water tank.

[0008] Through the above technical solution, the atomized water vapor can be fully mixed with the hot steam, avoiding the phenomenon of fog clumping caused by uneven local temperature distribution, and also making the fog and smoke mix more evenly. At the same time, since multiple ultrasonic atomizers are located below the heating water tank, the contact time between the water mist and the heating water tank can be adjusted by controlling the working parameters of different atomizers, thereby indirectly controlling the temperature of the water mist.

[0009] Furthermore, the standard gas supply regulating component includes a standard gas main pipe, a standard gas branch pipe, and a standard gas switch valve that are connected to an external standard gas storage device; The main gas pipe passes through the side wall of the exhaust pipe and extends into the exhaust pipe. There are multiple branch gas pipes arranged in a rotationally symmetrical manner. Each branch gas pipe is connected to the end of the main gas pipe. The jet nozzle is connected to the end of the branch gas pipe away from the main gas pipe. The jet nozzle is detachably equipped with a standard gas nozzle, which is conical and has multiple gas nozzles facing away from the flue gas flow direction. The standard gas nozzles of each of the jet nozzles are staggered along the length of the exhaust pipe.

[0010] The above technical solution can ensure that the standard gases ejected from each jet nozzle can be effectively mixed.

[0011] Furthermore, the exhaust pipe is vertically arranged and a condensate collection box is provided below the exhaust pipe. The bottom of the collection box is provided with a U-shaped drain port for discharging the condensate to the outside of the casing.

[0012] The above technical solution can prevent the condensate generated on the inner wall of the exhaust pipe from dripping into the machine casing and causing corrosion to related components.

[0013] Furthermore, at least one flue gas sampling port is provided on the side wall of the end of the exhaust pipe away from the housing; The intelligent control module includes: A standard gas detector is installed at the flue gas sampling port to collect and acquire parameter data of the output flue gas; The target parameter acquisition unit is configured to acquire the target parameters for generating high-humidity flue gas. The control reference storage unit is configured to store theoretical parameters of the flue gas output from the exhaust pipe that reflect the high humidity gas generation component and / or standard gas mixing module under various working positions and working parameter conditions, and store them as a reference data table. The first signal generation unit is configured to acquire the target parameters and generate a first control signal based on the reference data table. The feedback analysis unit is configured to acquire the actual parameter data output by the standard gas detector. The intelligent control unit is configured to receive the actual parameter data, calculate the difference between the actual parameter and the target parameter and compare it with a set threshold. If the difference exceeds the set threshold, the operating parameters of one or more modules in the gas component generation module and / or standard gas mixing module are adjusted until the difference between the actual parameter and the target parameter of the output flue gas is maintained within the set range.

[0014] The above technical solutions enable more accurate output flue gas parameters, allowing the system to adapt to different testing environments or teaching scenarios.

[0015] Furthermore, the housing is provided with multiple exhaust ports, each exhaust port is detachably equipped with a baffle for sealing the exhaust gas, and the exhaust pipe is detachably connected to one of the exhaust ports. The exhaust pipes are configured with multiple specifications and shapes.

[0016] Through the above technical solution, in practical applications, exhaust pipes of different specifications and shapes can be installed on different exhaust ports to generate high-humidity flue gas that is more similar to the actual exhaust gas.

[0017] Furthermore, the standard control module and intelligent control module are configured as a microcontroller control module or an FPGA control module.

[0018] A method for controlling the generation of high-humidity flue gas in a laboratory, based on the aforementioned high-humidity flue gas generation system in a laboratory, includes: Acquire and store the target parameters of the output flue gas, and generate the first control parameters based on the reference data table; Based on the first control parameter, a control signal is generated to control the working position and working parameters of each gas component generation module and the standard gas mixing module. The actual parameters of the output flue gas are obtained from the flue gas sampling port, the difference between the actual parameters and the target parameters is calculated, and then compared with a set threshold. If the difference exceeds the set threshold, the operating parameters of one or more modules in the gas component generation module and / or standard gas mixing module are adjusted until the difference between the actual parameters of the output flue gas and the target parameters is maintained within the set range.

[0019] Through the above technical solution, the system can flexibly and accurately adjust each functional module based on the set control parameters and the actual output parameters, so that the parameters of the output flue gas are maintained within the set range, ensuring the uniformity and stability of the output flue gas, and flexibly applicable to different testing environments and teaching scenarios.

[0020] Furthermore, the control method also includes: Under specific control parameter conditions, obtain the correlation between the working position of each gas component generation module and the output flue gas parameters, and store it as a position parameter reference table; Acquire and store the target parameters of the output flue gas, and determine the currently feasible control parameters; Based on the position parameter reference table, the working position of each gas component generation module is determined, and the relevant gas component generation modules are automatically or manually activated to achieve the output of high-humidity flue gas.

[0021] This application includes at least one of the following beneficial effects: (1) After the high-humidity gas, which is the base gas, is generated and mixed inside the casing, the pollutant gas is then mixed into the exhaust pipe, which makes the generated flue gas more uniform and controllable. (2) Compared with flue gas generating devices with fixed positions and working parameters, the working positions and working parameters of each gas component generating module in the high-humidity gas generating component of this solution are independently controlled. By combining different working positions with different working parameters, a variety of high-humidity gases with different parameters can be generated. When the intelligent control mode is adopted, even if the working parameter control fails, the output parameters can be controlled by changing the working position based on the fixed working parameters. It has high reliability, is suitable for different application scenarios and needs, and ensures the uniformity and stability of the output flue gas. (3) By mixing standard gas into the exhaust pipe, it is possible to effectively prevent pollutant particles from contaminating and corroding the functional modules inside the casing. Furthermore, while maintaining the basic flue gas parameters unchanged, the content and state of various gases in the flue gas can be flexibly adjusted according to the target parameters, which facilitates the reuse of the equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the high-humidity flue gas generation system for laboratory use in this application; Figure 2 This is a schematic diagram of the standard gas mixing module; Figure 3 This is a schematic diagram showing the functional unit connections of the intelligent control module.

[0023] Reference numerals: 1. Housing; 2. Exhaust pipe; 3. Heating water tank; 4. Electric heating element; 5. Water temperature sensor; 6. First liquid level sensor; 7. Drain outlet; 8. Atomizing water tank; 9. Ultrasonic atomizer; 10. Second liquid level sensor; 11. Turbine fan; 12. Wind speed sensor; 13. Smoke generator; 14. First water supply pipe; 15. Second water supply pipe; 16. Peristaltic pump; 17. Standard gas main pipe; 18. Standard gas branch pipe; 19. 20. Standard gas switch valve; 21. Standard gas nozzle; 22. Gas nozzle; 23. Condensate collection box; 24. Flue gas sampling port; 25. Observation window; 26. Water storage tank; 27. Drain pipe; 28. Standard gas detector; 29. ​​Target parameter acquisition unit; 30. Control reference storage unit; 31. First signal generation unit; 32. Feedback analysis unit; 33. Intelligent control unit; 34. High humidity gas generation component; 35. Standard gas mixing module. Detailed Implementation

[0024] The embodiments of this application are described in detail below, and examples of the embodiments are shown in the accompanying drawings.

[0025] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] A laboratory high-humidity flue gas generation system is used to control the generation and output of flue gas with controllable parameters, which facilitates the testing of the performance of relevant atmospheric monitoring instruments and also helps in the training of relevant personnel.

[0027] like Figure 1 As shown, the high-humidity flue gas generation system described in this application includes a housing 1 and an exhaust pipe 2 connected thereto. The main body of the housing 1 is made of corrosion-resistant 304 stainless steel, and the exhaust pipe 2 is a detachable 110mm standard PVC pipe. An observation window 24 is provided on the housing 1.

[0028] In order to generate high-humidity flue gas that is more similar to real exhaust gas, in a specific embodiment, the casing 1 is provided with multiple exhaust ports, and each exhaust port is detachably provided with a baffle for sealing the flue gas. The exhaust pipe 2 is detachably connected to one of the exhaust ports. Correspondingly, the exhaust pipe 2 has multiple specifications and shapes, such as a curved shape, a chimney shape that is smaller at the top and larger at the bottom, etc.

[0029] The laboratory high-humidity flue gas generation system described in this application mainly includes a high-humidity gas generation component 33, a standard gas mixing module 34, and a control module that controls the working state of both.

[0030] The high-humidity gas generating component 33 includes multiple independently configurable gas component generating modules with adjustable working positions and parameters, used to generate high-humidity gas with set parameters and output it from the exhaust pipe 2. In this embodiment, the parameters corresponding to the output flue gas include: flue gas temperature, flue gas humidity, flue gas velocity, flue gas pressure, water mist particle size in the flue gas, and one or more combinations of the following: concentration of gaseous pollutants and concentration of particulate pollutants of a set type in the flue gas.

[0031] It should be noted that the working position described in this application refers to the position of a gas component generating module when generating a certain type of gaseous substance, not the installation position of the module. For example, in the embodiment of this application, multiple ultrasonic atomizers 9 are configured at different positions in the housing 1, and the atomization position can be independently configured by activating the atomizers at different positions. The working parameters in this application refer to parameters such as the operating power and operating time of a gas component generating module, such as the heating power and heating time of the heating tube in the hot steam generating module.

[0032] Detailed, such as Figure 1 As shown, the gas component generation module includes: a hot steam generation module, a room temperature atomization module, a fan module, a smoke generation module, and a water replenishment module.

[0033] The hot steam generating module includes a heating water tank 3 housed within the casing 1. The heating water tank 3 is made of thermally conductive material. The heating water tank 3 contains an electric heating element 4, a water temperature sensor 5, and a first liquid level sensor 6, all connected to the control module. A drain outlet 7 is located at the bottom of the tank and is connected to an external drain pipe 26. The water temperature sensor 5 and the first liquid level sensor 6 are signal-connected to the control module, outputting water temperature and liquid level signals to the control module to control the water temperature and liquid level.

[0034] The ambient temperature atomizing module includes an atomizing water tank 8 and an ultrasonic atomizer 9 fixedly installed inside the housing 1. A second liquid level sensor 10 is installed in the atomizing water tank 8. The ultrasonic atomizer 9 is connected to the control module for control, and the second liquid level sensor 10 is connected to the control module for signal transmission. A drain outlet 7 is provided at the bottom of the atomizing water tank 8, and the drain outlet 7 is connected to an external drain pipe 26. The second liquid level sensor 10 detects the liquid level in the atomizing water tank 8 and outputs a liquid level signal to the control module.

[0035] The fan module includes a turbine fan 11 mounted at the air inlet on the housing 1 and a wind speed sensor 12 located at the end of the exhaust pipe 2. In this embodiment, the number of air inlets is configured as one, but in practical applications, multiple inlets can be configured. Preferably, the output airflow directions of the multiple air inlets are set at a predetermined angle, so that when the turbine fan 11 in two air inlets is working, the generated airflow can impact each other within the housing 1, thereby making various gases such as water mist, water vapor, and smoke within the housing 1 mix evenly. The wind speed sensor 12 is signal-connected to the control module and is used to detect the airflow velocity at the outlet of the exhaust pipe 2 and output the velocity signal to the control module. The turbine fan 11 is control-connected to the control module to control the airflow velocity within the exhaust pipe 2. The smoke generation module includes a smoke generator 13 connected to the air inlet of the turbine fan 11 via an external air duct, used to output the smoke generated when the smoke-generating material is burned into the housing 1. In practical applications, smoke generation is achieved by burning smoke powder, and the required concentration of particulate matter in the exhaust gas is determined by the amount of smoke powder released in the combustion furnace.

[0036] The water replenishment module includes a first water replenishment pipe 14 and a second water replenishment pipe 15 connected to the heating water tank 3 and the atomizing water tank 8. Both the first water replenishment pipe 14 and the second water replenishment pipe 15 are equipped with peristaltic pumps 16, which are connected to a control module. In this embodiment, both the first water replenishment pipe 14 and the second water replenishment pipe 15 are connected to a water storage tank 25 mounted on the casing 1. In practical applications, they can be directly connected to external water supply facilities, such as municipal water pipes, and the water replenishment volume can be controlled by an electric switch valve.

[0037] Optimized, such as Figure 1 As shown, multiple ultrasonic atomizers 9 are configured, arranged side-by-side below the heating water tank 3. In a specific embodiment, the atomizing water tank 8 and the heating water tank 3 are arranged in an alternating adjacent manner. The atomized water vapor can be fully mixed with the hot steam, avoiding fogging caused by uneven local temperature distribution, and also making the mixture of fog and smoke more uniform. At the same time, since multiple ultrasonic atomizers 9 are all located below the heating water tank 3, the contact time between the water mist and the heating water tank 3 can be adjusted by controlling the operating parameters of different atomizers, thereby indirectly controlling the temperature of the water mist.

[0038] The electric heating element 4 and the turbine fan 11 are configured to be at least one, preferably multiple. By changing the local heating heat or the input air volume, the size and temperature of the local airflow inside the casing 1 are controlled, thereby controlling the parameters of the basic flue gas in the casing 1, which is conducive to the precise adjustment of the parameters of the output flue gas.

[0039] Combination Figure 2As shown, the standard gas mixing module 34 includes at least two jet nozzles arranged alternately along the length of the exhaust pipe 2 and a standard gas supply regulating component connected thereto, for mixing standard gas into the exhaust pipe 2. The standard gas in this embodiment is the polluting gas used for testing, such as sulfur-containing gas, nitrogen-containing gas, etc.

[0040] Detailed, combined Figure 1 and Figure 2 As shown, the standard gas supply regulating component includes a standard gas main pipe 17, standard gas branch pipes 18, and a standard gas switch valve 19, all connected to an external standard gas storage device. The standard gas main pipe 17 passes through the side wall of the exhaust pipe 2 and extends into the exhaust pipe 2. There are multiple standard gas branch pipes 18 arranged in a rotationally symmetrical manner. Each standard gas branch pipe 18 is connected to an end of the standard gas main pipe 17. The jet nozzle is connected to the end of a standard gas branch pipe 18 furthest from the standard gas main pipe 17. A standard gas nozzle 20 is detachably mounted on the jet nozzle. The standard gas nozzle 20 is conical and has multiple gas outlets 21 facing away from the flue gas flow direction. The standard gas nozzles 20 of each jet nozzle are staggered along the length of the exhaust pipe 2.

[0041] In this embodiment, there are two jet nozzles, both located at the lower end of the flue attached to the main unit. They are made of corrosion-resistant materials such as 304 stainless steel or polytetrafluoroethylene. Two standard gas main pipes 17 are positioned opposite each other on both sides of the flue, arranged in a staggered manner. Each standard gas branch pipe 18 has a Y-shaped structure, with each Y-shaped support point having an opening angle of 120 degrees. Each support point has a downward-facing standard gas nozzle 20, and each nozzle 20 has six gas outlets 21. Thus, each standard gas main pipe 17 has 18 downward-facing gas outlets 21, ensuring thorough mixing of the standard gas and the rising humidified airflow. The six Y-shaped support points of the two jet nozzles are staggered by 60 degrees in a longitudinal view, preventing interference and ensuring effective mixing of both standard gas components.

[0042] In this embodiment, the exhaust pipe 2 is vertically arranged, and a condensate collection box 22 is provided below the exhaust pipe 2. This box can collect acidic condensate containing sulfur dioxide and nitrogen oxides dripping from the flue, preventing it from entering the housing 1 and corroding the room-temperature atomizing module, etc. The bottom of the collection box is provided with a U-shaped drain port 7 for discharging the condensate to the outside of the housing 1, preventing flue gas from overflowing from the drain port 7. The condensate collection box 22 is generally disc-shaped and contains stainless steel wire or ceramic cushioning material to prevent the dripping condensate from splashing.

[0043] In practical applications, to generate high-humidity gas flow with fixed parameters, fixed control parameters are typically used to control the high-humidity gas generating component 33 and the standard gas mixing module 34. However, practice shows that the uniformity of gas mixing and output stability are not only related to the parameters of the equipment itself, but also affected by environmental parameters such as ambient temperature and humidity. For example, when the ambient temperature is too low, the particle size of water mist generated by water vapor condensation inside the casing 1 will decrease, and the amount of sulfur dioxide gas absorbed when mixed into the gas will increase, thus affecting the gas detection results. Obviously, relying on fixed control parameters to control the aforementioned high-humidity gas generating component 33 and standard gas mixing module 34 has limitations in terms of high-humidity flue gas generation effect.

[0044] Therefore, in this embodiment, the control module is configured to be connected to the high-humidity gas generating component 33 and the standard gas mixing module 34 for control, and outputs control signals to control the operation of the high-humidity gas generating component 33 and / or the standard gas mixing module 34 to control the parameters of the output flue gas. Specifically, the control module includes a standard control module and an intelligent control module.

[0045] The standard control module is configured to output control signals according to a set of control instructions.

[0046] The intelligent control module is configured to acquire parameter data of the output flue gas in the exhaust pipe 2, and automatically adjust the control parameters of the high humidity gas generating component 33 and / or the standard gas mixing module 34 according to the target parameters and output control signals so that the difference between the parameters of the output flue gas and the target parameters is maintained within the set range.

[0047] In this embodiment of the application, at least one flue gas sampling port 23 is provided on the side wall of the end of the exhaust pipe away from the housing 1. The flue gas sampling port 23 can be used for flue gas sampling of the device under test, and can also be used for sampling by the standard gas detector 27 in the intelligent control module.

[0048] Detailed, combined Figure 3 As shown, the intelligent control module includes a standard gas detector 27, a target parameter acquisition unit 28, a control reference storage unit 29, a first signal generation unit 30, a feedback analysis unit 31, and an intelligent control unit 32.

[0049] A standard gas detector 27 is installed at the flue gas sampling port 23 to collect parameter data of the output flue gas. The standard gas detector 27 is configured as a calibrated dedicated gas detector to detect the composition and content of pollutants in the output flue gas.

[0050] The target parameter acquisition unit 28 is configured to acquire target parameters for generating high-humidity flue gas, such as airflow temperature and humidity, smoke particle concentration and size, etc. In this embodiment, the target parameter acquisition unit 28 is equipped with an Android touch screen or a button output device with a display screen for inputting the required high-humidity flue gas parameters.

[0051] The control reference storage unit 29 includes a memory configured to store theoretical parameters of the flue gas output from the exhaust pipe 2, reflecting the conditions under which the high-humidity gas generating component 33 and / or the standard gas mixing module 34 are in various operating positions and operating parameters. This data is stored as a reference data table. In practical applications, each control parameter and its corresponding theoretical flue gas parameters are obtained through factory testing, providing data reference for subsequent product use.

[0052] The first signal generation unit 30 is configured to acquire the target parameters and generate a first control signal based on the reference data table. The first signal generation unit 30 acquires theoretical parameter data and then converts and outputs the corresponding electronic control signal. The feedback analysis unit 31 is configured to acquire the actual parameter data output by the standard gas detector 27, which can be directly acquired from the data interface of the standard gas detector 27 in practical applications. The intelligent control unit 32 is configured to receive the actual parameter data, calculate the difference between the actual parameters and the target parameters, and compare it with a set threshold. If the difference exceeds the set threshold, the operating parameters of one or more modules in the gas component generation module and / or standard gas mixing module 34 are adjusted, and a second control signal is output until the difference between the actual parameters and the target parameters of the output flue gas remains within a set range.

[0053] In detail, in the embodiments of this application, the above-mentioned standard control module configuration and intelligent control module include a microcontroller control module or an FPGA control module.

[0054] Based on the above-mentioned high-humidity flue gas generation system for laboratories, this application also discloses a method for controlling the generation of high-humidity flue gas for laboratories, including: S100: Acquire and store the target parameters of the output flue gas, and generate the first control parameters based on the reference data table; S200, based on the first control parameters, a control signal is generated to adjust the working position and working parameters of each gas component generation module and the standard gas mixing module 34. S300: Obtain the actual parameters of the output flue gas from the flue gas sampling port 23, calculate the difference between the actual parameters and the target parameters, and compare it with a set threshold. If the difference exceeds the set threshold, the operating parameters of one or more modules in the gas component generation module and / or standard gas mixing module 34 are adjusted to generate a second control parameter and output a corresponding second control signal until the difference between the actual parameter of the output flue gas and the target parameter is maintained within the set range. If the difference does not exceed the currently set threshold, the current first control parameter is maintained.

[0055] In a particular embodiment, the control method further includes: Under specific control parameter conditions, obtain the correlation between the working position of each gas component generation module and the output flue gas parameters, and store it as a position parameter reference table; Acquire and store the target parameters of the output flue gas, and determine the currently feasible control parameters; Based on the position parameter reference table, the working position of each gas component generation module is determined, and the relevant gas component generation modules are turned on automatically or manually to achieve the output of high-humidity flue gas.

[0056] The working principle and process of this application are as follows: The peristaltic pump 16, controlled by the control module, pumps water from the water storage tank 25 into the heating water tank 3 and the atomizing water tank 8. The first and second liquid level sensors 10 monitor the liquid level in the water tank. When the liquid level drops, water is automatically replenished to maintain a relatively stable liquid level. By controlling the operating power of the electric heating element 4 and the ultrasonic atomizer 9, the rate of water vapor and water mist generation can be adjusted. By controlling the working position of the electric heating element 4 and the ultrasonic atomizer 9, the airflow and temperature inside the casing 1 can be finely adjusted. For example, by activating the ultrasonic atomizer 9 directly below the heating water tank 3, the generated water mist will be heated by the heating water tank 3 during its ascent, thus achieving temperature fine-tuning. Especially when the ambient temperature is low and the airflow blown in from the turbine fan 11 is low, the above solution can quickly dissipate the heat of the heating water tank 3 into the casing 1 with the water mist. By controlling the turbine fan 11, airflow from the external environment can be blown into the casing 1. During this process, solid smoke particles can be input, generating basic high-humidity smoke with basic parameter settings inside the casing 1.

[0057] When the basic flue gas is output into the exhaust pipe 2, standard gas is mixed in at the pipe opening. The flue gas that has been initially mixed in the casing 1 is further mixed by the influence of the standard gas flow, so that the final output high-humidity flue gas is more uniform and stable, which is conducive to the development of related tests or teaching tasks.

[0058] By configuring different control modes and using flexible and detachable exhaust pipes, the entire system can adapt to different usage environments and teaching scenarios, simulating the generation of polluting gases in various situations, and is adaptable to testing different types of polluting gases.

[0059] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A laboratory high-moisture smoke gas generation system, characterized by, Including the housing (1) and the exhaust pipe (2) connected thereto, and also including: The high-humidity gas generating component (33) includes multiple gas component generating modules that can be independently configured with working positions and working parameters, for generating high-humidity gas with set parameters and outputting it from the exhaust pipe (2); The standard gas mixing module (34) includes at least two jet nozzles arranged alternately along the length of the exhaust pipe (2) and a standard gas supply regulating component connected thereto, for mixing standard gas into the exhaust pipe (2); The control module is configured to be connected to the high-humidity gas generating component (33) and the standard gas mixing module (34) for control, and outputs control signals to control the operation of the high-humidity gas generating component (33) and / or the standard gas mixing module (34) to control the parameters of the output flue gas. The parameters corresponding to the output flue gas include: flue gas temperature, flue gas humidity, flue gas velocity, flue gas pressure, water mist particle size in the flue gas, and one or more combinations of the concentration of gaseous pollutants and particulate pollutants of a set type in the flue gas. The control module includes: The standard control module is configured to output control signals according to a set of control commands; or The intelligent control module is configured to acquire parameter data of the output flue gas in the exhaust pipe (2), and automatically adjust the control parameters of the high humidity gas generation component (33) and / or the standard gas mixing module (34) according to the target parameters and output control signals so that the difference between the parameters of the output flue gas and the target parameters is maintained within the set range. The gas component generation module includes: The hot steam generating module includes a heating water tank (3) installed in the housing (1), an electric heating tube (4), a water temperature sensor (5) and a first liquid level sensor (6) installed in the heating water tank (3), and a drain outlet (7) installed at the bottom of the water tank. The electric heating tube (4) is connected to the control module for control, and the water temperature sensor (5) and the first liquid level sensor (6) are connected to the control module for signal connection. A room temperature atomizing module includes an atomizing water tank (8) and an ultrasonic atomizer (9) fixedly installed in the housing (1). A second liquid level sensor (10) is provided in the atomizing water tank (8). The ultrasonic atomizer (9) is connected to the control module for control. The second liquid level sensor (10) is connected to the control module for signal. A drain outlet (7) is provided at the bottom of the atomizing water tank (8). The fan module includes a turbine fan (11) installed at the air inlet on the casing (1) and a wind speed sensor (12) located at the end of the exhaust pipe (2). The wind speed sensor (12) is connected to the control module for signaling, and the turbine fan (11) is connected to the control module for control, so as to control the airflow speed in the exhaust pipe (2). The smoke generating module includes a smoke generator (13) connected to the air inlet of a turbine fan (11) via an external air duct, which is used to output the smoke generated when the smoke-generating material is burned to the housing (1). The water replenishment module includes a first water replenishment pipe (14) and a second water replenishment pipe (15) that are respectively connected to the heating water tank (3) and the atomizing water tank (8). Both the first water replenishment pipe (14) and the second water replenishment pipe (15) are equipped with peristaltic pumps (16), and the peristaltic pumps (16) are connected to the control module. The ultrasonic atomizer (9) is configured in multiple ways, and the electric heating tube (4) and the turbine fan (11) are configured in at least one way. Multiple ultrasonic atomizers (9) are arranged side by side and located below the heating water tank (3), or are arranged in an alternating manner adjacent to the heating water tank (3); At least one flue gas sampling port (23) is provided on the side wall of the end of the exhaust pipe (2) away from the casing (1); The intelligent control module includes: A standard gas detector (27) is set at the flue gas sampling port (23) to collect and acquire parameter data of the output flue gas; The target parameter acquisition unit (28) is configured to acquire the target parameters for generating high-humidity flue gas; The control reference storage unit (29) is configured to store the theoretical parameters of the flue gas output from the exhaust pipe (2) associated with the high humidity gas generation component (33) and / or the standard gas mixing module (34) under various working positions and working parameter conditions, and store them as a reference data table; The first signal generation unit (30) is configured to acquire the target parameters and generate a first control signal based on the reference data table; The feedback analysis unit (31) is configured to acquire the actual parameter data output by the standard gas detector (27); The intelligent control unit (32) is configured to receive the actual parameter data, calculate the difference between the actual parameter and the target parameter and compare it with a set threshold. If the difference exceeds the set threshold, the operating parameters of one or more modules in the gas component generation module and / or standard gas mixing module (34) are adjusted until the difference between the actual parameter and the target parameter of the output flue gas is maintained within the set range.

2. The laboratory high-moisture smoke gas generation system of claim 1, wherein, The standard gas supply regulating device includes a standard gas main pipe (17), a standard gas branch pipe (18), and a standard gas switch valve (19) connected to an external standard gas storage device; The main gas pipe (17) passes through the side wall of the exhaust pipe (2) and extends into the exhaust pipe (2). There are multiple branch pipes (18) and they are arranged in a rotationally symmetrical manner. Each branch pipe (18) is connected to the end of the main gas pipe (17). The jet nozzle is connected to the end of the branch pipe (18) away from the main gas pipe (17). The jet nozzle is detachably equipped with a standard gas nozzle (20), which is conical and has multiple gas nozzles (21) facing away from the flue gas flow direction. The standard gas nozzles (20) of each of the jet nozzles are staggered along the length of the exhaust pipe (2).

3. The laboratory high-moisture smoke gas generation system of claim 2, wherein, The exhaust pipe (2) is vertically arranged and a condensate collection box (22) is provided below the exhaust pipe (2). The bottom of the collection box is provided with a U-shaped drain port (7) for discharging condensate to the outside of the casing (1).

4. The laboratory high-humidity flue gas generation system according to claim 1, characterized in that, The housing (1) is provided with multiple exhaust ports, and each exhaust port is detachably provided with a baffle for sealing the smoke. The exhaust pipe (2) is detachably connected to one of the exhaust ports. The exhaust pipe (2) has multiple specifications and shapes.

5. The laboratory high-moisture smoke gas generation system of claim 4, wherein, The standard control module and intelligent control module are configured as either a microcontroller control module or an FPGA control module.

6. A laboratory high-moisture smoke generation control method, characterized by, Based on the laboratory high-humidity flue gas generation system according to any one of claims 1-5, comprising: Acquire and store the target parameters of the output flue gas, and generate the first control parameters based on the reference data table; Based on the first control parameter, a control signal is generated to control the working position and working parameters of each gas component generation module and the standard gas mixing module (34); The actual parameters of the output flue gas are obtained from the flue gas sampling port (23), the difference between the actual parameters and the target parameters is calculated and compared with the set threshold: If the difference exceeds the set threshold, the operating parameters of one or more modules in each gas component generation module and / or standard gas mixing module (34) are adjusted until the difference between the actual parameters of the output flue gas and the target parameters is maintained within the set range. The control method further includes: Under specific control parameter conditions, obtain the correlation between the working position of each gas component generation module and the output flue gas parameters, and store it as a position parameter reference table; Acquire and store the target parameters of the output flue gas, and determine the currently feasible control parameters; Based on the position parameter reference table, the working position of each gas component generation module is determined, and the relevant gas component generation modules are automatically or manually activated to achieve the output of high-humidity flue gas.

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