A high-frequency pulse microwave silica gel regeneration device based on dynamic feedback control

Abstract

The application provides a high-frequency pulse microwave silica gel regeneration device based on dynamic feedback control, which comprises a device shell, a microwave resonance cavity arranged in the device shell, and a gas duct arranged in a side wall of the device shell and used for exhausting gas; a ventilation system arranged in the gas duct and used for exhausting gas in the microwave resonance cavity; a high-frequency pulse microwave generator used for applying high-frequency pulse microwave to discolored silica gel to be regenerated arranged in the microwave resonance cavity; a temperature sensor used for monitoring the surface temperature of the discolored silica gel in real time; a color sensor used for monitoring the color of the discolored silica gel in real time; a humidity sensor used for monitoring the humidity of the exhaust gas in real time; and a controller configured to control the ventilation system and the high-frequency pulse microwave generator according to the surface temperature, the color of the discolored silica gel and the humidity of the exhaust gas. The device can improve the problems of particle breakage, high loss rate and large energy consumption of silica gel caused by thermal stress or uncontrollable instantaneous high pressure in the conventional silica gel regeneration method, and is helpful to prolong the service life of the silica gel.

Description

Technical Field

[0001] This application relates to the field of desiccant regeneration technology, and more specifically, to a high-frequency pulsed microwave silica gel regeneration device based on dynamic feedback control. Background Technology

[0002] Color-changing silica gel is widely used as a regenerable desiccant due to its property of changing color after absorbing moisture. Currently, moisture-saturated color-changing silica gel is mainly regenerated by heating in an oven, but this method has the following problems: 1) Thermal stress damage: The oven uses external hot air convection heating, and the heat is transferred from the surface of the silicone particles to the inside, forming a significant temperature gradient. This causes huge thermal stress inside the particles, which leads to silicone cracking and pulverization, resulting in high single regeneration loss rate and short cycle life.

[0003] 2) High energy consumption and low efficiency: Hot air heating is inefficient and requires maintaining high temperature baking for a long time, resulting in huge energy consumption.

[0004] 3) Uneven regeneration: The accumulated silica gel particles do not come into sufficient contact with the hot air, resulting in overheating of the outer particles and incomplete regeneration of the inner particles, which affects the moisture absorption performance after regeneration.

[0005] In recent years, microwave regeneration technology has been proposed, but existing technologies mostly use continuous wave or long pulse intermittent heating, resulting in uncontrollable energy release. This leads to violent vaporization of moisture inside the silicone, causing a sudden increase in local vapor pressure, and the impact effect can still cause the silicone skeleton to break. Therefore, existing technologies have failed to solve the problem of silicone loss during microwave regeneration, nor have they revealed how to reduce the breakage rate during silicone regeneration by precisely controlling the microwave energy application method. Summary of the Invention

[0006] This application provides at least one high-frequency pulsed microwave silicone regeneration device based on dynamic feedback control. This device can realize a multi-stage, variable-parameter refined processing flow, which can improve the problems of silicone particle rupture, high loss rate and high energy consumption caused by thermal stress or uncontrollable instantaneous high pressure in traditional silicone regeneration methods, and help extend the service life of silicone.

[0007] This application provides a high-frequency pulsed microwave silicone regeneration device based on dynamic feedback control, comprising: The device housing contains a microwave resonant cavity, and its side walls are provided with exhaust ducts. A ventilation system, which is installed in the air duct, is used to exhaust the gas in the microwave resonant cavity; A high-frequency pulsed microwave generator is disposed in the microwave resonant cavity and is used to apply high-frequency pulsed microwaves to the color-changing silica gel to be regenerated placed in the microwave resonant cavity; A temperature sensor, which is disposed in the microwave resonant cavity, is used to monitor the surface temperature of the color-changing silicone in real time; A color sensor is disposed in the microwave resonant cavity for real-time monitoring of the color-changing silicone. A humidity sensor is installed in the air passage to monitor the humidity of the exhaust gas in real time; The controller is electrically connected to the ventilation system, the high-frequency pulse microwave generator, the temperature sensor, the color sensor, and the humidity sensor, and is configured to control the parameters of the ventilation system and the high-frequency pulse microwave generator to change in stages according to the surface temperature and color of the color-changing silica gel and the humidity of the exhaust gas, so as to regenerate the color-changing silica gel.

[0008] In one optional implementation, the controller's control process is divided into three regeneration stages, wherein, In the first regeneration stage, the high-frequency pulse microwave generator is controlled to apply a microwave pulse sequence with a low peak power, a wide pulse width, and a high repetition frequency to the color-changing silica gel. At the same time, the ventilation system is started and the humidity of the exhaust gas is monitored in real time. When the humidity drops to a set threshold, the next stage is entered. In the second regeneration stage, the high-frequency pulse microwave generator is controlled to switch to a microwave pulse sequence with high peak power, narrow pulse width, and medium repetition frequency, and the microwave parameters are dynamically adjusted to maintain the surface temperature of the silicone below the safe threshold. At the same time, the color change of the color-changing silicone is monitored in real time, and the next stage is entered when the blue coverage exceeds the preset ratio. In the third regeneration stage, the high-frequency pulse microwave generator is controlled to stop microwave emission, and the ventilation system is controlled to increase the ventilation volume to force the residual moisture out and cool the silica gel until the exhaust humidity is lower than the final threshold. The color-changing silica gel is then removed and stored in a sealed container.

[0009] In one optional implementation, during the first regeneration stage, the microwave pulse parameters are: peak power 500-1500W, pulse width 50-100µs, and repetition frequency 2-5kHz; during the second regeneration stage, the microwave pulse parameters are: peak power 1500-3000W, pulse width 1-30µs, and repetition frequency 1-4kHz; during the third regeneration stage, the ventilation time is 3-10 minutes, and the induced draft fan speed is 100% of full power operation.

[0010] In one alternative implementation, the set threshold is when the exhaust humidity drops to 60-80% of the initial peak value.

[0011] In one optional implementation, the preset ratio is 90-95%.

[0012] In one alternative implementation, the final threshold is <10%RH.

[0013] In one alternative implementation, it further includes: A rotating drum, detachably disposed within the microwave resonant cavity, has an inner cavity for the color-changing silicone and is configured to rotate circumferentially during the regeneration of the color-changing silicone.

[0014] In one alternative embodiment, the sidewall of the rotating drum is provided with micropores for venting.

[0015] In one alternative embodiment, the rotating drum is made of microwave-transparent quartz glass.

[0016] In one alternative embodiment, the rotating drum rotates at a speed of 0.5-5 revolutions per minute.

[0017] The above-mentioned technical solution of this application has the following beneficial technical effects: The high-frequency pulsed microwave silicone regeneration equipment based on dynamic feedback control in this application embodiment can realize a multi-stage, parameter-variable, and refined processing flow by introducing a multi-sensor dynamic feedback closed-loop control system. It can not only improve the problems of low efficiency and high loss in the traditional oven method, but also improve the problem of high silicone breakage rate caused by coarse energy control in the conventional microwave method. It achieves efficient and energy-saving regeneration processing while ensuring extremely high particle integrity, which has significant progress and practical value.

[0018] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. These drawings are incorporated in and constitute a part of this specification. They illustrate embodiments conforming to this application and, together with the specification, serve to explain the technical solutions of this application. It should be understood that the following drawings only show some embodiments of this application and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of a high-frequency pulsed microwave silicone regeneration device based on dynamic feedback control provided in an embodiment of this application is shown. In the picture: 1. Equipment casing; 11. Microwave resonant cavity; 12. Air duct; 2. Ventilation system; 3. High-frequency pulse microwave generator; 4. Humidity sensor; 5. Rotating drum. Detailed Implementation

[0021] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0022] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0023] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0024] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] refer to Figure 1 This application provides a silicone microwave regeneration device, including a device housing 1, a ventilation system 2, a high-frequency pulsed microwave generator 3, a temperature sensor, a color sensor, a humidity sensor 4, and a controller. A microwave resonant cavity 11 is disposed within the device housing 1, and an exhaust duct 12 is provided on the side wall of the device housing 1. The ventilation system 2 is disposed within the exhaust duct 12 and is used to exhaust gas from the microwave resonant cavity 11. The high-frequency pulsed microwave generator 3 is disposed within the microwave resonant cavity 11 and is used to apply high-frequency pulsed microwaves to the color-changing silicone (hygroscopically saturated color-changing silicone) to be regenerated placed within the microwave resonant cavity 11. The temperature sensor is disposed within the microwave resonant cavity 11 and is used to monitor the surface temperature of the color-changing silicone in real time. The color sensor is disposed within the microwave resonant cavity 11 and is used to monitor the color of the color-changing silicone in real time. The humidity sensor 4 is disposed within the exhaust duct 12 and is used to monitor the humidity of the exhaust gas in real time. The controller is electrically connected to the high-frequency pulse microwave generator 3, temperature sensor, color sensor, ventilation system 2 and humidity sensor 4. The controller is configured to control the parameters of the ventilation system 2 and the high-frequency pulse microwave generator 3 in stages according to the surface temperature, color and humidity of the exhaust gas of the color-changing silica gel, so as to regenerate the color-changing silica gel.

[0027] In some embodiments, the ventilation system 2 includes a variable frequency fan, which is controlled by a controller to instantaneously increase its speed during the "interval" of the microwave pulse. This efficiently extracts water vapor escaping from the silicone micropores into the microwave resonant cavity 11, reducing the humidity within the microwave resonant cavity 11. Correspondingly, the controller controls the variable frequency fan to appropriately reduce its speed during the application of the microwave pulse to avoid over-cooling the silicone surface.

[0028] In some embodiments, the temperature sensor is a non-contact infrared temperature sensor.

[0029] In some embodiments, the color sensor is an optical color sensor.

[0030] In some embodiments, the temperature sensor and color sensor may be integrated on the surface of the high-frequency pulse microwave generator 3.

[0031] In some embodiments, the controller's control process is divided into three regeneration stages, wherein: In the first regeneration stage, the high-frequency pulse microwave generator 3 is controlled to apply a microwave pulse sequence with a low peak power, a wide pulse width, and a high repetition frequency to the color-changing silica gel. At the same time, the ventilation system 2 is started and the humidity of the exhaust gas is monitored in real time. When the humidity drops to the set threshold, the next stage is entered. In the second regeneration stage, the high-frequency pulse microwave generator 3 is switched to a microwave pulse sequence with high peak power, narrow pulse width, and medium repetition frequency, and the microwave parameters are dynamically adjusted to keep the surface temperature of the silicone below the safe threshold. At the same time, the color change of the color-changing silicone is monitored in real time. When the blue coverage exceeds the preset ratio, the next stage is entered. In the third regeneration stage, the high-frequency pulse microwave generator 3 is controlled to stop microwave emission, and the ventilation system 2 is controlled to increase the ventilation volume, forcibly expel residual moisture and cool the silica gel until the exhaust humidity is lower than the final threshold. The discolored silica gel is then removed and stored in a sealed container.

[0032] In some embodiments, during the first regeneration stage, the microwave pulse parameters are: peak power 500-1500W, pulse width 50-100µs, and repetition frequency 2-5kHz. During the second regeneration stage, the microwave pulse parameters are: peak power 1500-3000W, pulse width 1-30µs, and repetition frequency 1-4kHz. During the third regeneration stage, the ventilation time is 3-10 minutes, and the induced draft fan speed is 100% of full power.

[0033] In some embodiments, the threshold is set to the point where the exhaust humidity drops to 60-80% of the initial peak. The preset ratio is 90-95%. The final threshold is <10%RH.

[0034] In some embodiments, dynamically adjusting microwave parameters to maintain the silicone surface temperature below a safe threshold includes: real-time monitoring of the surface temperature of the color-changing silicone, and reducing the repetition frequency or peak power when the temperature approaches the safe threshold. For example, if the safe threshold is set to 120°C, when the surface temperature of the silicone approaches the safe threshold (e.g., reaches 118°C), the control unit can control the microwave source to reduce the repetition frequency or peak power, thereby maintaining the silicone surface temperature below the safe threshold.

[0035] In some embodiments, a rotating drum 5 is further included, which is detachably disposed in the microwave resonant cavity 11. The drum has an inner cavity for the color-changing silica gel and is configured to rotate circumferentially during the regeneration of the color-changing silica gel. By controlling the rotation of the rotating drum 5 during the regeneration process, it helps all silica gel particles to receive microwave irradiation evenly, thereby removing moisture from each silica gel particle.

[0036] In some embodiments, the sidewall of the rotating drum 5 is provided with micropores for venting.

[0037] In some embodiments, the rotating roller 5 is made of microwave-transparent quartz glass. Of course, in other embodiments, the rotating roller 5 may also be made of other transparent materials.

[0038] In some embodiments, the rotational speed of the rotating drum 5 is 0.5-5 revolutions per minute.

[0039] In some embodiments, the microwave resonant cavity 11 is provided with a rotating support and a driving mechanism. The rotating drum 5 is rotatably mounted on the rotating support, and the driving mechanism is configured to drive the rotating drum 5, which is placed on the rotating support, to rotate circumferentially. This configuration enables the rotating drum 5 to rotate during the regeneration process.

[0040] The key feature of the high-frequency pulsed microwave silica gel regeneration device based on dynamic feedback control in this application is that, instead of continuously or simply intermittently applying microwave energy, the microwave energy is precisely applied to the water molecules inside the silica gel in the form of a specific pulse sequence with "high peak power, narrow pulse width, and adjustable repetition frequency".

[0041] The key feature of the high-frequency pulsed microwave silica gel regeneration device based on dynamic feedback control in this application is its non-thermal equilibrium heating mechanism. Specifically, within each microsecond (µs)-level narrow pulse duration, the high-peak-power electric field energy is instantaneously absorbed by water molecules, causing them to vibrate violently and vaporize rapidly. Because the silica skeleton of silica gel is a non-polar material with extremely low microwave absorption efficiency, it hardly heats up during the extremely short pulse duration. This achieves selective and precise heating of the "water," while the "silicone skeleton" remains at a relatively low temperature, fundamentally avoiding the generation of thermal stress.

[0042] The key feature of the high-frequency pulsed microwave silicone regeneration device based on dynamic feedback control in this application is transient pressure management. Specifically, during the "interval" (or "duty cycle" off-period) between two high-energy pulses, a sufficient "escape window" is provided for the internally generated water vapor. The water vapor can diffuse and escape relatively gently through the microporous structure of the silicone, avoiding the internal high pressure that could burst the silicone structure due to continuous steam accumulation. This is fundamentally different from the mechanism of internal pressure "bursting" caused by continuous microwave heating.

[0043] The key feature of the high-frequency pulsed microwave silicone regeneration equipment based on dynamic feedback control in this application is the dynamic feedback closed-loop control. That is, instead of using fixed power and time, it introduces a dynamic feedback system fused from multiple sensors. By monitoring the color change, surface temperature, and humidity of the exhaust gas in real time, the control unit dynamically adjusts the pulse width, repetition frequency, and peak power of subsequent microwave pulses, achieving an intelligent and precise regeneration process that "supplys energy on demand."

[0044] The high-frequency pulsed microwave silicone regeneration equipment based on dynamic feedback control in this application embodiment can realize a multi-stage, parameter-variable, and refined processing flow by introducing a multi-sensor dynamic feedback closed-loop control system. It can not only improve the problems of low efficiency and high loss in the traditional oven method, but also improve the problem of high silicone breakage rate caused by coarse energy control in the conventional microwave method. It achieves efficient and energy-saving regeneration processing while ensuring extremely high particle integrity, which has significant progress and practical value.

[0045] To further illustrate the technical solutions and beneficial effects of the embodiments of this application, specific comparative examples and embodiments are described below.

[0046] Comparative Example 1 Traditional oven heating method: Step S101: Take 1 kg of commercially available cobalt chloride-containing color-changing silica gel that has turned completely pink due to moisture absorption, spread it evenly in a tray, place it in a 2000W rated power forced-air drying oven, and set the temperature to 120℃ for regeneration treatment.

[0047] Step S102: Observe the time. At 60 minutes, most of the silicone particles turned purplish-red, while some remained pink. At 120 minutes, all silicone particles returned to blue.

[0048] Step S103: Remove and cool.

[0049] According to the sieving and weighing method, 115g of silica gel was found to be broken or pulverized, with a particle integrity rate of approximately 88.5%. It can be seen that this method is time-consuming, energy-intensive, and causes significant structural damage to the silica gel.

[0050] Comparative Example 2 Conventional (non-dynamically controlled) pulse microwave method: Step S201: Take 1 kg of pink color-changing silicone, the same as Comparative Example 1, and put it into a glass container. Then, place the glass container into the microwave resonant cavity of an industrial microwave device that can set pulse parameters but has no feedback control function.

[0051] Step S202: After setting the peak power to 2000W, pulse width to 100µs, and repetition frequency to 5kHz, start the device for continuous operation.

[0052] Step S203: After about 15 minutes, a large amount of water vapor was observed in the container, and the color of the silica gel changed rapidly. After 20 minutes, all the silica gel turned blue, and the microwave treatment was stopped.

[0053] Step S204: Remove and cool.

[0054] Weighing and analyzing the silica gel by sieving revealed that 60g of it was broken, with a particle integrity rate of approximately 94%. Although this method significantly reduces the time required, it still resulted in considerable particle breakage.

[0055] Example 1 Step S301: Take 1 kg of pink color-changing silicone, the same as in Comparative Example 1, and place it inside a quartz glass rotating drum. Then, install the rotating drum into the microwave resonant cavity of the high-frequency pulse microwave silicone regeneration device based on dynamic feedback control in this embodiment.

[0056] Step S302: Set control parameters: final exhaust humidity <10%RH, silicone surface temperature <120℃ throughout.

[0057] Step S303: Start regeneration: Phase 1 (0-8 minutes): The system starts with a peak power of 1000W, a pulse width of 80µs, and a repetition frequency of 2kHz. The drum rotates at 2 rpm, and the induced draft fan operates at 30% power. During this period, the exhaust humidity sensor reading rapidly rises from ambient humidity to 95%RH, and then slowly decreases. When the humidity drops to 70%RH, the system automatically enters the next phase.

[0058] Phase Two (8-35 minutes): The controller switches the microwave parameters to a peak power of 2000W, a pulse width of 20µs, and a repetition frequency of 4kHz. During this period, a non-contact infrared temperature sensor monitors the silicone surface temperature in real time. At the 25-minute mark, the temperature reaches 118℃, and the system automatically reduces the repetition frequency to 3.5kHz, stabilizing the temperature within the 115-118℃ range. The optical color sensor detects that the silicone color changes from pink to purple, and gradually exhibits a large area of ​​blue.

[0059] Phase 3 (35-40 minutes): When the optical color sensor determines that the blue coverage exceeds 95% and the humidity sensor reading drops to 15%RH, the system stops microwave emission and increases the power of the exhaust fan to 100% for powerful ventilation and cooling.

[0060] Step S304, Regeneration Complete: After 40 minutes, the system will indicate that regeneration is complete. Remove the silicone.

[0061] Through sieving and weighing, it was found that only 12g of silica gel had minor breakage, with a particle integrity rate as high as 98.8%. Compared with the conventional pulsed microwave method, this method can significantly reduce the breakage rate of color-changing silica gel.

[0062] Example 2 Step S401: Take 1 kg of pink color-changing silicone, the same as in Comparative Example 1, and place it inside a quartz glass rotating drum. Then, install the rotating drum into the microwave resonant cavity of the high-frequency pulse microwave silicone regeneration device based on dynamic feedback control in this embodiment.

[0063] Step S402: Set control parameters: final exhaust humidity <10%RH, silicone surface temperature <120℃ throughout.

[0064] Step S403: Start regeneration: Phase 1 (0-5 minutes): Start with a peak power of 1500W, a pulse width of 100µs, and a repetition frequency of 3kHz to quickly complete the preheating.

[0065] Phase Two (5-22 minutes): Switch to peak power of 2500W, pulse width of 30µs, and repetition frequency of 5kHz. The system's maximum allowable temperature is 130℃, which is maintained by dynamically adjusting the repetition frequency and pulse width.

[0066] Phase 3 (22-25 minutes): Microwave stops, and the induced draft fan runs at full power for 3 minutes.

[0067] Step S404, Regeneration Completed: Total time 25 minutes. The system indicates regeneration is complete. Remove the silicone. According to the sieving and weighing method, only 21g of silica gel was found to be broken, and the particle integrity rate was 97.9%. Compared with Example 1, the time was shortened by 37.5%, at the cost of a slight increase in the breakage rate, but it is still far superior to all comparative examples.

[0068] The regeneration results of the comparative examples and embodiments are presented in the following table:

[0069] As can be seen from the comparison of the above comparative examples and embodiments, the high-frequency pulse microwave silicone regeneration method based on dynamic feedback control in this application, by introducing a multi-sensor dynamic feedback closed-loop control system and adopting a multi-stage, parameter-variable refined processing flow, can not only improve the problems of low efficiency and high loss in the traditional oven method, but also improve the problem of high silicone breakage rate caused by coarse energy control in the conventional microwave method. It achieves efficient and energy-saving regeneration processing while ensuring extremely high particle integrity, and has significant progress and practical value.

[0070] One or more embodiments in this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this specification should be included within the scope of protection of this application.

[0071] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A high-frequency pulsed microwave silicone regeneration device based on dynamic feedback control, characterized in that, include: The device housing contains a microwave resonant cavity, and its side walls are provided with exhaust ducts. A ventilation system, which is installed in the air duct, is used to exhaust the gas in the microwave resonant cavity; A high-frequency pulsed microwave generator is disposed in the microwave resonant cavity and is used to apply high-frequency pulsed microwaves to the color-changing silica gel to be regenerated placed in the microwave resonant cavity; A temperature sensor, which is disposed in the microwave resonant cavity, is used to monitor the surface temperature of the color-changing silicone in real time; A color sensor is disposed in the microwave resonant cavity for real-time monitoring of the color-changing silicone. A humidity sensor is installed in the air passage to monitor the humidity of the exhaust gas in real time; The controller is electrically connected to the ventilation system, the high-frequency pulse microwave generator, the temperature sensor, the color sensor, and the humidity sensor, and is configured to control the parameters of the ventilation system and the high-frequency pulse microwave generator to change in stages according to the surface temperature and color of the color-changing silica gel and the humidity of the exhaust gas, so as to regenerate the color-changing silica gel.

2. The high-frequency pulse microwave silicone regeneration device based on dynamic feedback control according to claim 1, characterized in that, The controller's control process is divided into three regeneration stages, among which... In the first regeneration stage, the high-frequency pulse microwave generator is controlled to apply a microwave pulse sequence with a low peak power, a wide pulse width, and a high repetition frequency to the color-changing silica gel. At the same time, the ventilation system is started and the humidity of the exhaust gas is monitored in real time. When the humidity drops to a set threshold, the next stage is entered. In the second regeneration stage, the high-frequency pulse microwave generator is controlled to switch to a microwave pulse sequence with high peak power, narrow pulse width, and medium repetition frequency, and the microwave parameters are dynamically adjusted to maintain the surface temperature of the silicone below the safe threshold. At the same time, the color change of the color-changing silicone is monitored in real time, and the next stage is entered when the blue coverage exceeds the preset ratio. In the third regeneration stage, the high-frequency pulse microwave generator is controlled to stop microwave emission, and the ventilation system is controlled to increase the ventilation volume to force the residual moisture out and cool the silica gel until the exhaust humidity is lower than the final threshold. The color-changing silica gel is then removed and stored in a sealed container.

3. The high-frequency pulse microwave silicone regeneration device based on dynamic feedback control according to claim 2, characterized in that, In the first regeneration stage, the microwave pulse parameters are: peak power 500-1500W, pulse width 50-100µs, and repetition frequency 2-5kHz. In the second regeneration stage, the microwave pulse parameters are: peak power 1500-3000W, pulse width 1-30µs, and repetition frequency 1-4kHz. In the third regeneration stage, the ventilation time is 3-10 minutes and the induced draft fan speed is 100% of full power operation.

4. The high-frequency pulse microwave silicone regeneration device based on dynamic feedback control according to claim 2, characterized in that, The set threshold is when the exhaust humidity drops to 60-80% of the initial peak value.

5. The high-frequency pulse microwave silicone regeneration device based on dynamic feedback control according to claim 2, characterized in that, The preset ratio is 90-95%.

6. The high-frequency pulse microwave silicone regeneration device based on dynamic feedback control according to claim 2, characterized in that, The final threshold is <10%RH.

7. The high-frequency pulse microwave silicone regeneration device based on dynamic feedback control according to claim 1, characterized in that, Also includes: A rotating drum, detachably disposed within the microwave resonant cavity, has an inner cavity for the color-changing silicone and is configured to rotate circumferentially during the regeneration of the color-changing silicone.

8. The high-frequency pulse microwave silicone regeneration device based on dynamic feedback control according to claim 7, characterized in that, The sidewall of the rotating drum is provided with micropores for venting.

9. The high-frequency pulse microwave silicone regeneration device based on dynamic feedback control according to claim 7, characterized in that, The rotating drum is made of microwave-transparent quartz glass.

10. The high-frequency pulse microwave silicone regeneration device based on dynamic feedback control according to claim 7, characterized in that, The rotating drum rotates at a speed of 0.5-5 revolutions per minute.

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