A powder devolatilization control system

Abstract

The present invention relates to the technical field of powder devolatilization, and in particular to a powder devolatilization control system, comprising: a heating module for heating the powder to liquefy the powder into glue liquid and gasify the residual volatile substances in the powder; a degassing module for discharging the gasified volatile substances; an information acquisition module, comprising a viscosity detection component, an image acquisition component, a temperature sensor and a mass flow rate detection component; a control module, comprising a data analysis component and a correction component, for determining whether the devolatilization efficiency is qualified based on the bubble generation rate, determining whether the glue liquid viscosity is qualified for unqualified devolatilization efficiency, determining whether there is powder accumulation in the devolatilizer based on the qualified glue liquid viscosity, and reducing the opening of the electric valve or increasing the oil inlet rate based on the unqualified glue liquid viscosity. The present invention improves the devolatilization efficiency of the powder.

Description

Technical Field

[0001] The invention relates to the technical field of powder devolatilization, and in particular to a powder devolatilization control system. Background Art

[0002] During the polymerization process, polymer powder often contains impurities such as undeactivated catalysts and unreacted monomers. These impurities not only affect the quality and stability of the product, but may also cause safety hazards in subsequent processing and storage. Therefore, it is particularly important to develop an efficient powder devolatilization control system.

[0003] The system uses a variety of technical means, such as the introduction of hot nitrogen, steam mixed gas and other media, as well as the synergistic effect of physical processes such as stirring, heating, and filtering, to effectively remove residual impurities in polymer powder. Specifically, the system controls the flow rate, temperature, and speed of the hot nitrogen and steam mixed gas, and the agitator to make the powder and the medium fully contact and interact, thereby separating impurities from the powder. At the same time, the system is also equipped with precise monitoring equipment that can monitor the key parameters of the devolatilization process in real time to ensure the efficiency, stability, and reliability of the devolatilization effect.

[0004] Chinese Patent Publication No.: CN106397641B discloses a device and method for removing volatiles from polymer powder, which can be applied to polyolefin production equipment. The devolatilization tank is a fluidized bed container provided with a distribution plate. The devolatilization device utilizes the fluidized bed principle to make the polymer fully contact with the mixed gas of hot nitrogen and steam, and the volatiles are carried away by the vented airflow, thereby improving the devolatilization efficiency; the device can adjust the ratio of hot nitrogen and steam while keeping the polymer powder dry.

[0005] It can be seen that the device and method for removing volatile components from polymer powder have the following problems: the devolatilization tank used in this method works intermittently, and the polymer that has not been devolatilized in the intermediate storage tank enters the devolatilization tank at one time and is completely discharged after devolatilization for a period of time. If the amount of polymer devolatilized at one time is too large, it will result in high energy consumption and incomplete devolatilization, thereby affecting the devolatilization efficiency. Summary of the invention

[0006] To this end, the present invention provides a powder devolatilization control system to overcome the problem of low devolatilization efficiency caused by intermittent devolatilization in the prior art.

[0007] To achieve the above object, the present invention provides a powder devolatilization control system, comprising:

[0008] A heating module, which is used to heat the powder material to liquefy the powder material so as to gasify the residual volatile substances in the powder material, and comprises an oil bath pipeline and a plate heat exchanger arranged on the oil bath pipeline;

[0009] A degassing module, which is connected to the heating module and is used to discharge gasified volatile substances, and comprises a gas inlet and a gas outlet, wherein an electric valve is provided in the gas outlet;

[0010] An information acquisition module, which is connected to the heating module and the degassing module respectively, and includes an image acquisition component for acquiring image information of bubbles in the devolatilizer, a viscosity detection component for detecting the viscosity of the glue liquid at the discharge port, a temperature sensor for detecting the temperature of the discharge port, and a mass flow rate detection component for respectively detecting a first mass flow rate of the powder at the feed port and a second mass flow rate of the glue liquid at the discharge port;

[0011] A control module, which is connected to the heating module, the degassing module and the information acquisition module respectively, comprises:

[0012] A data analysis component, which is used to determine the bubble generation rate based on the image information to determine the eligibility of the devolatilization efficiency, obtain the glue viscosity for the unqualified devolatilization efficiency to determine the eligibility of the glue viscosity, and determine whether there is powder accumulation in the devolatilizer based on the qualified glue viscosity;

[0013] A correction component is used to obtain the analysis result of the data analysis component, reduce the opening of the electric valve or increase the oil inlet rate when the viscosity of the glue is unqualified, and reduce the first mass flow rate when it is determined that powder accumulation exists.

[0014] Furthermore, the plate heat exchanger is stacked on the oil bath pipe and arranged in an inverted cone shape, and the inclination angle of the plate heat exchanger is adjustable based on the second mass flow rate.

[0015] Further, the data analysis component determines that the devolatilization efficiency is unqualified based on the comparison result that the bubble generation rate is less than a preset bubble generation rate.

[0016] Furthermore, the data analysis component determines that the viscosity of the glue solution is unqualified based on a comparison result that the viscosity of the glue solution is greater than a preset viscosity for the unqualified devolatilization efficiency.

[0017] Furthermore, the data analysis component determines that the viscosity of the glue liquid is qualified based on a comparison result that the viscosity of the glue liquid is less than or equal to the preset viscosity.

[0018] Furthermore, the data analysis component calculates the flow rate difference between the first mass flow rate and the second mass flow rate under the condition that the viscosity of the glue is qualified, and determines that there is powder accumulation in the devolatilizer based on the comparison result that the flow rate difference is greater than a preset flow rate difference.

[0019] Further, the correction component determines to adjust the first mass flow rate with a first flow rate adjustment coefficient based on a comparison result that the flow rate difference percentage is greater than a preset difference percentage under the condition that powder accumulation exists;

[0020] The correction component determines to adjust the first mass flow rate by a second flow rate adjustment coefficient based on a comparison result that the flow rate difference percentage is less than or equal to the preset difference percentage;

[0021] The flow rate difference percentage is obtained by subtracting the preset flow rate difference from the flow rate difference.

[0022] Further, the correction component detects the temperature of the discharge port based on the condition that the viscosity of the glue is unqualified, and determines to reduce the opening based on the condition that the temperature of the discharge port is less than the first preset temperature and greater than the second preset temperature;

[0023] The correction component determines to increase the oil feed rate based on the condition that the outlet temperature is less than the second preset temperature;

[0024] Wherein, the first preset temperature is a standard discharge port temperature.

[0025] Further, the correction component determines to reduce the opening by a first opening adjustment coefficient based on a comparison result that the first temperature difference percentage is greater than a first preset percentage, and determines to reduce the opening by a second opening adjustment coefficient based on a comparison result that the first temperature difference percentage is less than or equal to the first preset percentage;

[0026] The first temperature difference percentage is obtained by making a difference between the first preset temperature and the outlet temperature.

[0027] Further, the correction component determines to adjust the oil intake rate with the first rate adjustment coefficient based on the comparison result that the second temperature difference percentage is greater than the second preset percentage, and determines to adjust the oil intake rate with the first rate adjustment coefficient based on the comparison result that the second temperature difference percentage is less than or equal to the second preset percentage, wherein the second temperature difference percentage is obtained by taking the difference between the second preset temperature and the outlet temperature.

[0028] Compared with the prior art, the invention has the beneficial effect that the invention heats the powder by arranging an oil bath pipeline and a heating plate, the oil bath provides heat to heat the powder through the heating plate, the oil outlet pipeline is arranged in the inner layer of the oil inlet pipeline, the temperature of the heating plate gradually decreases from the outer wall direction of the devolatilizer to the middle direction, the powder enters the devolatilizer from the middle position of the devolatilizer, and flows in the direction of increasing temperature, thereby achieving uniform heating of the powder, avoiding uneven heating of the powder due to excessive temperature difference, which affects the precipitation of volatile substances; the devolatilization of volatile substances is determined by detecting the generation rate of bubbles Whether the efficiency is qualified, the volatile substances are accelerated by the generation and bursting of bubbles. The faster the bubble generation rate, the faster the volatile substances volatilize. For the condition of unqualified devolatilization efficiency, the viscosity of the glue at the discharge inlet is detected. Too high viscosity means that the temperature in the devolatilizer is too low, due to the low oil feed rate resulting in less heat input to the devolatilizer or the excessive opening of the electric valve resulting in too much heat taken away. Normal viscosity means that the pressure in the devolatilizer is relatively high, which affects the generation of bubbles, thereby affecting the devolatilization efficiency of volatile substances. According to the determined reasons, the parameters of the devolatilization process are adjusted to improve the devolatilization efficiency.

[0029] Furthermore, the present invention determines whether the devolatilization efficiency of volatile substances is qualified through the bubble generation rate of the image acquisition component. The faster the bubble generation rate, the higher the devolatilization efficiency. For the case of low devolatilization efficiency, the adjustment benchmark is determined based on the bubble generation rate, thereby improving the devolatilization efficiency.

[0030] Furthermore, the present invention detects the viscosity of the glue liquid to determine the cause under the condition that the devolatilization efficiency of the volatile substance is unqualified. A high viscosity of the glue liquid indicates that the temperature in the devolatilizer is too low. The lower the temperature, the greater the viscosity of the glue liquid and the lower the bubble generation rate. In view of the low temperature, the oil inlet rate or opening is adjusted to increase heat input or reduce heat loss, thereby ensuring the temperature in the devolatilizer and improving the devolatilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of a powder devolatilization control system according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of a heating module according to an embodiment of the present invention;

[0033] Figure 3 This is a structural block diagram of a powder devolatilization control system according to an embodiment of the present invention;

[0034] Figure 4 A flow chart for determining whether the devolatilization efficiency is qualified according to an embodiment of the present invention;

[0035] Figure 5 A flow chart for determining whether the viscosity of the glue is qualified according to an embodiment of the present invention;

[0036] In the figure: 1. feed inlet; 2. discharge port; 3. oil bath inlet; 4. oil bath outlet; 5. gas inlet; 6. gas outlet; 7. plate heat exchanger; 8. oil inlet pipeline; 9. oil outlet pipeline; 10. electric valve; 11. first conical plug; 12. second conical plug; 13. image acquisition component; 14. oil bath pipeline; 15. temperature sensor; 16. first mass flow meter; 17. second mass flow meter; 18. rotational viscometer. DETAILED DESCRIPTION

[0037] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0039] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0040] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] See also Figure 1-Figure 5 As shown, Figure 1 This is a schematic diagram of the structure of a powder devolatilization control system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a heating module according to an embodiment of the present invention; Figure 3 This is a structural block diagram of a powder devolatilization control system according to an embodiment of the present invention; Figure 4 A flow chart for determining whether the devolatilization efficiency is qualified according to an embodiment of the present invention; Figure 5 The present invention is a flowchart for determining whether the viscosity of the glue is qualified.

[0042] The embodiment of the present invention provides a powder devolatilization control system, comprising:

[0043] A heating module, which is used to heat the powder to liquefy the powder so as to gasify the residual volatile substances in the powder, and comprises an oil bath pipeline 14 and a plate heat exchanger 7 arranged on the oil bath pipeline;

[0044] A degassing module, which is connected to the heating module and is used to discharge gasified volatile substances, comprises a gas inlet 5 and a gas outlet 6, wherein an electric valve 10 is provided in the gas outlet 6;

[0045] An information acquisition module, which is connected to the heating module and the degassing module respectively, and includes an image acquisition component 13 for acquiring image information of bubbles in the devolatilizer, a viscosity detection component for detecting the viscosity of the glue liquid at the discharge port 2, a temperature sensor for detecting the temperature of the discharge port, and a mass flow rate detection component for respectively detecting a first mass flow rate of the powder at the feed port 1 and a second mass flow rate of the glue liquid at the discharge port 2;

[0046] A control module, which is connected to the heating module, the degassing module and the information acquisition module respectively, comprises:

[0047] A data analysis component, which is used to determine the bubble generation rate based on the image information to determine the eligibility of the devolatilization efficiency, obtain the glue viscosity for the unqualified devolatilization efficiency to determine the eligibility of the glue viscosity, and determine whether there is powder accumulation in the devolatilizer based on the qualified glue viscosity;

[0048] A correction component is used to obtain the analysis result of the data analysis component, reduce the opening of the electric valve or increase the oil inlet rate when the viscosity of the glue is unqualified, and reduce the first mass flow rate when it is determined that powder accumulation exists.

[0049] Specifically, the temperature range of the oil bath pipe 14 is set to [200° C., 400° C.], and 300° C. is preferred in the embodiment of the present invention.

[0050] Specifically, the image acquisition component 13 includes an image sensor, a lens and a light source. The specific models and parameters of the image sensor, the lens and the light source are not limited and only need to meet the requirements.

[0051] Specifically, the viscosity detection component includes a rotational viscometer 18 such as a Brookfield viscometer, and its specific model and parameters are not limited, as long as the viscosity measurement requirements are met.

[0052] Specifically, the specific model and parameters of the temperature sensor 15 are not limited.

[0053] Specifically, the mass flow rate detection component includes a first mass flow meter 16 and a second mass flow meter 17, and their specific models and parameters are not limited, as long as they meet the mass flow rate measurement requirements.

[0054] Specifically, the plate heat exchanger 7 is stacked on the oil bath pipe 14 and arranged in an inverted cone shape, and the inclination angle of the plate heat exchanger 7 is adjustable based on the second mass flow rate.

[0055] Specifically, the material of the plate heat exchanger 7 is aluminum, and any material with high thermal conductivity coefficient is not specifically limited. The plate heat exchanger 7 and the oil bath pipe 14 are connected by rails and sliders. The sliders are hinged to the plate heat exchanger 7, and the slide rails are opened on the outer wall of the oil bath pipe.

[0056] Specifically, the value range of the inclination angle of the plate heat exchanger 7 is set to (0, 10°], the inclination direction is that the end of the plate heat exchanger 7 close to the first conical plug 11 is inclined upward, and the end away from the first conical plug 11 is inclined downward, and the angle between the inclination direction and the horizontal plane is the inclination angle. The plate heat exchanger 7 has a certain inclination angle to accelerate the flow of the glue liquid, which can effectively overcome the problem of glue liquid accumulation; on the other hand, the inclination angle cannot be too large, and the flow speed of the glue liquid is too fast, resulting in too short contact time between the powder and the plate heat exchanger 7, and the volatile substances cannot be fully released, resulting in low devolatilization efficiency.

[0057] Specifically, the inclination angle of the plate heat exchanger 7 is inclined at a first inclination angle based on the comparison result that the second mass flow rate is greater than the preset flow rate;

[0058] The inclination angle of the plate heat exchanger 7 is inclined at a second inclination angle based on the comparison result that the second mass flow rate is less than or equal to the preset flow rate.

[0059] Specifically, the value range of the preset flow rate is set to [3kg / (m²·s), 8kg / (m²·s)], and 5kg / (m²·s) is preferred in the embodiment of the present invention; the value range of the first inclination angle is set to (0°, 5°], and 4° is preferred in the embodiment of the present invention; the value range of the second inclination angle is set to (5°, 10°], and 8° is preferred in the embodiment of the present invention.

[0060] Specifically, the plate heat exchanger 7 is arranged in an inverted cone shape, and the inclination angle can be adjusted in the vertical direction. The powder enters the devolatilizer from the first conical plug 11, preferentially falls on the upper layer of the plate heat exchanger 7, and then falls to the lower layers in sequence, thereby avoiding the accumulation of powder at the bottom, resulting in low utilization efficiency of the upper plate heat exchanger 7, and thus low devolatilization efficiency; the powder enters the devolatilizer, liquefies into glue liquid on the plate heat exchanger 7 and flows along the end of the plate heat exchanger 7 where the temperature rises, and goes out from the discharge port 2 under the action of gravity. The plate heat exchanger 7 arranged in an inverted cone shape overcomes the stacking between the upper and lower layers of the glue liquid, increases the contact area between the glue liquid and the gas, and thus improves the devolatilization efficiency.

[0061] Specifically, the present invention heats the powder by setting an oil bath pipeline 14 and a heating plate. The oil bath provides heat to heat the powder through the heating plate. The oil outlet pipeline 9 is set in the inner layer of the oil inlet pipeline 8. The temperature of the heating plate gradually decreases from the outer wall direction of the devolatilizer to the middle direction. The powder enters the devolatilizer from the middle position of the devolatilizer and flows in the direction of increasing temperature, thereby achieving uniform heating of the powder and avoiding uneven heating of the powder due to excessive temperature difference, which affects the precipitation of volatile substances. The devolatilization efficiency of volatile substances is determined by detecting the generation rate of bubbles. Whether the rate is qualified, the volatile substances are accelerated by the generation and rupture of bubbles. The faster the bubble generation rate, the faster the volatilization rate of the volatile substances. For the condition of unqualified devolatilization efficiency, the viscosity of the glue at the discharge inlet is detected. Too high viscosity means that the temperature in the devolatilizer is too low, due to the low oil feed rate resulting in less heat input to the devolatilizer or the excessive opening of the electric valve 10 resulting in too much heat taken away. Normal viscosity means that the pressure in the devolatilizer is relatively high, which affects the generation of bubbles, thereby affecting the devolatilization efficiency of volatile substances. According to the determined reasons, the parameters of the devolatilization process are adjusted.

[0062] Specifically, the data analysis component determines that the devolatilization efficiency of the volatile substance is unqualified based on the comparison result that the bubble generation rate is less than a preset bubble generation rate;

[0063] The data analysis component determines that the devolatilization efficiency of the volatile substance is qualified based on the comparison result that the bubble generation rate is greater than or equal to the preset bubble generation rate.

[0064] Specifically, the preset bubble generation rate is related to the preparation process of the powder. Different preparation processes have different amounts of residual volatile substances. The larger the amount of residual volatile substances, the value range of the preset bubble generation rate in the embodiment of the present invention is set to [500 / s, 1000 / s], preferably 750 / s.

[0065] Specifically, the greater the bubble generation rate, the faster the gasification rate of the volatile substances, and the higher the devolatilization efficiency.

[0066] Specifically, the data analysis component determines that the viscosity of the glue liquid is unqualified based on the comparison result that the viscosity of the glue liquid is greater than a preset viscosity;

[0067] The data analysis component determines that the viscosity of the glue liquid is qualified based on a comparison result that the viscosity of the glue liquid is less than or equal to the preset viscosity.

[0068] Specifically, the preset viscosity is determined according to the type and purpose of the glue. The preset viscosity is different for different types and purposes of the glue. For example, the viscosity range of PET for synthetic fibers is 0.66dL / g-0.68dL / g, and the viscosity range of PET for polyester packaging bottles is 0.75dL / g-0.95dL / g, and there is no specific limitation.

[0069] It is understandable that the greater the viscosity of the glue liquid, the harder it is for the glue liquid to flow, and the easier it is for it to accumulate in the devolatilizer, affecting the outflow of the glue liquid and thus resulting in low devolatilization efficiency.

[0070] Specifically, the data analysis detects the discharge port temperature based on the condition that the glue viscosity is unqualified, and determines to reduce the opening of the electric valve 10 based on the condition that the discharge port temperature is less than the first preset temperature and greater than the second preset temperature;

[0071] Determining to increase the oil feed rate based on the condition that the outlet temperature is less than the second preset temperature;

[0072] Wherein, the first preset temperature is a standard discharge port temperature.

[0073] Specifically, the standard outlet temperature is the lowest temperature corresponding to when the viscosity of the glue is qualified; the value range of the second preset temperature is set to [180°C, 220°C], and 200°C is preferred in the embodiment of the present invention.

[0074] It can be understood that a high viscosity of the glue indicates a low temperature at the discharge port. The temperature of the discharge port 2 is related to the oil inlet rate and the gas flow rate in the oil bath pipe 14. A plurality of oil bath pipes 14 are provided on the inner side of the outer wall of the devolatilizer to serve as an insulation layer to reduce temperature fluctuations in the devolatilizer. Volatile substances are separated from the powder by heating and are carried out of the devolatilizer by the airflow. A large amount of heat is lost during the devolatilization process. If the oil inlet rate is too low or the valve opening is too large, resulting in an excessively high gas flow rate, the heat input to the devolatilizer will be too little or the heat lost will be too much, resulting in an unqualified temperature in the devolatilizer.

[0075] It can be understood that the greater the opening of the electric valve 10, the greater the flow rate of the gas, the more heat is taken away, and the lower the temperature in the devolatilizer.

[0076] Specifically, the data analysis component calculates the flow rate difference between the first mass flow rate and the second mass flow rate under the condition that the viscosity of the glue liquid is qualified, determines that there is powder accumulation in the devolatilizer based on the comparison result that the flow rate difference is greater than a preset flow rate difference, and subtracts the preset flow rate difference from the flow rate difference to obtain a flow rate difference percentage.

[0077] Determining to adjust the first mass flow rate with a first flow rate adjustment coefficient based on a comparison result that the flow rate difference percentage is greater than a preset difference percentage;

[0078] Based on the comparison result that the flow rate difference percentage is less than or equal to the preset difference percentage, it is determined to adjust the first mass flow rate with a second flow rate adjustment coefficient.

[0079] Specifically, the preset flow rate difference is a value corresponding to the median of flow rate differences with qualified devolatilization efficiency for the same kind of powder during historical devolatilization processes.

[0080] Specifically, the value range of the preset difference percentage is set to [15%, 30%], and 20% is preferred in the embodiment of the present invention; the value range of the first flow rate adjustment coefficient is set to [0.7, 0.8], and 0.75 is preferred in the embodiment of the present invention; the value range of the second flow rate adjustment coefficient is set to [0.81, 0.97], and 0.9 is preferred in the embodiment of the present invention.

[0081] Specifically, the oil inlet rate is controlled by a pump (not shown in the figure), and the control module can adjust the power of the pump according to the analysis result of the oil inlet rate.

[0082] Specifically, the first mass flow rate is regulated by, for example, multiplying the first flow rate regulation coefficient by the first mass flow rate, and the obtained product is the regulated first mass flow rate.

[0083] It can be understood that the first mass flow rate is the feed flow rate, and the second mass flow rate is the discharge flow rate. The devolatilization process will cause the weight of the discharge to be less than the weight of the feed. A large flow rate difference indicates that the discharge is small under the condition of a certain feed amount. Therefore, it is determined that there is powder accumulation in the devolatilizer. The powder accumulation causes the liquefaction rate of the powder to be slow, resulting in low devolatilization efficiency.

[0084] Specifically, the correction component subtracts the first preset temperature from the outlet temperature to obtain a first temperature difference percentage.

[0085] Determining to reduce the opening by a first opening adjustment coefficient based on a comparison result that the first temperature difference percentage is greater than a first preset percentage;

[0086] Based on the comparison result that the first temperature difference percentage is less than or equal to the first preset percentage, it is determined to reduce the opening by a second opening adjustment coefficient.

[0087] Specifically, the value range of the first preset percentage is set to [5%, 15%], and 8% is preferred in the embodiment of the present invention; the value range of the first opening adjustment coefficient is set to [0.5, 0.7], and 0.55 is preferred in the embodiment of the present invention; the value range of the second opening adjustment coefficient is set to [0.8, 0.9], and 0.85 is preferred in the embodiment of the present invention;

[0088] It can be understood that the method of adjusting the opening using the opening adjustment coefficient is to multiply the adjustment coefficient by the opening before adjustment, and the product is the opening after adjustment. For example, the opening before adjustment is 50mm, and the opening is reduced to 50mm×0.55=27.5mm by the first adjustment coefficient, and 27.5 is the opening after adjustment.

[0089] Specifically, the correction component makes a difference between the second preset temperature and the outlet temperature to obtain a second temperature difference percentage.

[0090] Determining to adjust the oil inlet rate with a first rate adjustment coefficient based on a comparison result that the second temperature difference percentage is greater than a second preset percentage;

[0091] The oil intake rate is adjusted by a first rate adjustment coefficient based on a comparison result that the second temperature difference percentage is less than or equal to the second preset percentage.

[0092] Specifically, the value range of the second preset percentage is set to [6%, 24%], and 12% is preferred in the embodiment of the present invention; the value range of the first rate adjustment coefficient is set to [1.3, 1.6], and 1.45 is preferred in the embodiment of the present invention; the value range of the second rate adjustment coefficient is set to [1.1, 1.29], and 1.23 is preferred in the embodiment of the present invention.

[0093] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A powder devolatilization control system, characterized in that: include: A heating module, which is used to heat the powder material to liquefy the powder material so as to gasify the residual volatile substances in the powder material, and comprises an oil bath pipeline and a plate heat exchanger arranged on the oil bath pipeline; A degassing module, which is connected to the heating module and is used to discharge gasified volatile substances, and comprises a gas inlet and a gas outlet, wherein an electric valve is provided in the gas outlet; An information acquisition module, which is connected to the heating module and the degassing module respectively, and includes an image acquisition component for acquiring image information of bubbles in the devolatilizer, a viscosity detection component for detecting the viscosity of the glue liquid at the discharge port, a temperature sensor for detecting the temperature of the discharge port, and a mass flow rate detection component for respectively detecting a first mass flow rate of the powder at the feed port and a second mass flow rate of the glue liquid at the discharge port; A control module, which is connected to the heating module, the degassing module and the information acquisition module respectively, comprises: A data analysis component, which is used to determine the bubble generation rate based on the image information to determine the eligibility of the devolatilization efficiency, obtain the glue viscosity for the unqualified devolatilization efficiency to determine the eligibility of the glue viscosity, and determine whether there is powder accumulation in the devolatilizer based on the qualified glue viscosity; A correction component is used to obtain the analysis result of the data analysis component, reduce the opening of the electric valve or increase the oil inlet rate when the viscosity of the glue is unqualified, and reduce the first mass flow rate when it is determined that powder accumulation exists.

2. The powder devolatilization control system according to claim 1, characterized in that: The plate heat exchanger is stacked on the oil bath pipe and arranged in an inverted cone shape, and the inclination angle of the plate heat exchanger is adjustable based on the second mass flow rate.

3. The powder devolatilization control system according to claim 1, characterized in that: The data analysis component determines that the devolatilization efficiency is unqualified based on the comparison result that the bubble generation rate is less than a preset bubble generation rate.

4. The powder devolatilization control system according to claim 3, characterized in that: The data analysis component determines that the viscosity of the glue solution is unqualified based on a comparison result that the viscosity of the glue solution is greater than a preset viscosity for the unqualified devolatilization efficiency.

5. The powder devolatilization control system according to claim 4, characterized in that: The data analysis component determines that the viscosity of the glue liquid is qualified based on a comparison result that the viscosity of the glue liquid is less than or equal to the preset viscosity.

6. The powder devolatilization control system according to claim 5, characterized in that: The data analysis component calculates the flow rate difference between the first mass flow rate and the second mass flow rate under the condition that the viscosity of the glue liquid is qualified, and determines that there is powder accumulation in the devolatilizer based on the comparison result that the flow rate difference is greater than a preset flow rate difference.

7. The powder devolatilization control system according to claim 6, characterized in that: The correction component determines to adjust the first mass flow rate with a first flow rate adjustment coefficient based on a comparison result that the flow rate difference percentage is greater than a preset difference percentage under the condition that powder accumulation exists; The correction component determines to adjust the first mass flow rate by a second flow rate adjustment coefficient based on a comparison result that the flow rate difference percentage is less than or equal to the preset difference percentage; The flow rate difference percentage is obtained by subtracting the preset flow rate difference from the flow rate difference.

8. The powder devolatilization control system according to claim 4, characterized in that: The correction component detects the discharge port temperature based on the condition that the glue viscosity is unqualified, and determines to reduce the opening based on the condition that the discharge port temperature is less than the first preset temperature and greater than the second preset temperature; The correction component determines to increase the oil feed rate based on the condition that the outlet temperature is less than the second preset temperature; Wherein, the first preset temperature is a standard discharge port temperature.

9. The powder devolatilization control system according to claim 8, characterized in that: The correction component determines to reduce the opening by a first opening adjustment coefficient based on a comparison result that the first temperature difference percentage is greater than a first preset percentage, and determines to reduce the opening by a second opening adjustment coefficient based on a comparison result that the first temperature difference percentage is less than or equal to the first preset percentage; The first temperature difference percentage is obtained by making a difference between the first preset temperature and the outlet temperature.

10. The powder devolatilization control system according to claim 8, characterized in that: The correction component determines to adjust the oil intake rate with the first rate adjustment coefficient based on the comparison result that the second temperature difference percentage is greater than the second preset percentage, and determines to adjust the oil intake rate with the first rate adjustment coefficient based on the comparison result that the second temperature difference percentage is less than or equal to the second preset percentage, wherein the second temperature difference percentage is obtained by the difference between the second preset temperature and the outlet temperature.

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