CN221268133U - A radio frequency based continuous flow device for improving liquid heating uniformity - Google Patents

Abstract

The utility model relates to the technical field of radio frequency treatment solutions, in particular to a radio frequency-based continuous flow device for improving the heating uniformity of liquid, which comprises a motor, a screw propeller, a peristaltic pump, a reaction cavity and the like. The continuous treatment is favorable for promoting the development of industrial treatment, the heating uniformity of the liquid solution and the high-viscosity solution in the radio frequency field can be improved by stirring by the screw, and the subsequent intensive researches of solution sterilization, extraction, enzyme deactivation and modification in the radio frequency field and the industrialized large-scale application can be facilitated by improving the uniformity research.

Description

A radio frequency based continuous flow device for improving liquid heating uniformity

Technical Field

The utility model relates to the technical field of radio frequency treatment solution, in particular to a continuous flow device based on radio frequency for improving liquid heating uniformity.

Background technique

Radio frequency heating has been widely studied in agricultural product processing due to its advantages such as large penetration energy depth, overall heating, and no chemical residue, such as drying, insecticide, sterilization, enzyme inactivation, extraction, etc. At present, the biggest problem with radio frequency heating materials is still the uneven heating phenomenon. In the study of solid materials, the uniformity of material heating is mainly improved by changing the material position, container shape, and plate state; research on heating liquid materials in radio frequency shows that radio frequency liquid sterilization, enzyme inactivation, extraction, and modification are more effective than conventional methods and take less time. However, liquid materials also have the phenomenon of uneven heating in radio frequency heating. Hot spots are easily formed at the corners and walls of the container, and cold spots are formed in areas that are not radiated. Hot spots will cause changes in the performance of the material here. During extraction, the extract will be pyrolyzed, the sterilization effect will be poor at the cold spots, and the extraction yield will be reduced, which seriously affects the processing effect of the material. Therefore, in-depth research is needed to improve the uniformity of radio frequency liquid heating.

At present, when radio frequency is used to process liquid materials, when the solution contains solid particles and has a high viscosity, more uneven heating will occur due to the different dielectric constants of the particles and the liquid, the low viscosity, the unclear convection phenomenon and the low heat transfer, which seriously affects applications such as sterilization, enzyme inactivation and extraction. Therefore, a continuous flow device based on radio frequency to improve the uniformity of liquid heating is developed to process solutions containing different particles and different viscosities and improve the heating uniformity of the solution in the radio frequency cavity. This is of great significance for the sterilization effect, extraction characteristics and enzyme inactivation of liquid materials and is also of guiding significance for the industrial application of radio frequency technology.

Utility Model Content

The purpose of the utility model is to put the radio frequency treated liquid material in a continuous flow state, to do basic research for industrialization, and also involves the treatment of liquid-liquid and solid-liquid mixtures, to change the different positions of different forms of materials at different times in the form of stirring, so that the material will not be heated at a certain point all the time, to improve the heating of the material while increasing the heat conduction of the solution, to make the overall temperature of the solution more uniform, and to effectively improve the sterilization, extraction and other effects of the solution. A continuous flow device based on radio frequency to improve the uniformity of liquid heating is provided.

The technical principle of this utility model:

A radio frequency-based continuous flow device for improving the uniformity of liquid heating. The material solution is placed in a material box and stirred and mixed at a certain rotation speed. The solution is pumped into the reaction chamber at a certain flow rate by a peristaltic pump. After reaching a certain height, the radio frequency generator and propeller power supply are turned on for processing. The entire device is in a continuous working state. There is optical fiber temperature measurement at the outlet. When the temperature does not reach the target temperature, it circulates to the material box. When the temperature reaches the set temperature, the circulation loop is closed, and the material flows to the collection box for post-processing.

The technical solution of this utility model:

A continuous flow device based on radio frequency for improving uniformity of liquid heating, comprising a reaction chamber and a servo motor, wherein the reaction chamber is connected to a servo motor in the horizontal direction, wherein the servo motor is controlled by a power supply, a drive and a 32-bit single chip microcomputer for speed and direction, wherein the servo motor is connected to a coupling, wherein the coupling is connected to a spiral shaft in the reaction chamber, wherein the spiral shaft is supported by a support seat, wherein the spiral shaft is supported by a bearing in the reaction chamber, wherein the bearing is fixed by an end cover, a spiral shaft and a bearing seat, wherein a spiral blade is installed on the spiral shaft for stirring. A solution input pipeline is connected to the left end of the reaction chamber, wherein the solution input pipeline is provided with pressure by a peristaltic pump, wherein the peristaltic pump is connected to a material box, wherein a stirring device is provided to mix materials of different forms. An air pressure balance opening is provided at the top of the reaction chamber. A solution output pipeline is connected to the right end of the reaction chamber, wherein the solution output pipeline is connected to a three-way joint, wherein the three-way joint determines the switch of the three-way joint according to the temperature of the solution measured by the optical fiber, wherein the temperature does not reach the set temperature, wherein the solution enters the circulation pipe from the three-way joint and flows into the material box, wherein the temperature reaches the set temperature, wherein the solution flows into the material collection box from the three-way joint.

Furthermore, the spiral shaft is supported by a ceramic bearing.

Furthermore, the spiral shaft and the reaction chamber are dynamically sealed by a USH fluororubber lip seal ring.

Furthermore, a vent hole is opened above the reaction chamber, and the reaction chamber is placed at the center of the radio frequency reactor plate.

Furthermore, the spiral blades on the spiral shaft can be replaced with blades of different shapes and sizes according to different research contents.

The beneficial effects of the utility model are:

The utility model provides a continuous flow device based on radio frequency for improving the uniformity of liquid heating, which has the following advantages: (1) utilizing the new technology of radio frequency to improve the treatment effect while saving the energy consumed by traditional hot water heating; (2) adopting a servo motor drive, the rotation speed of the screw shaft can be accurately controlled without errors caused by changes in load; (3) using a propeller for stirring can not only change the position of the material, but also mix the solid materials that sink to the bottom or float into the solution, so that the radio frequency heating temperature of the solution is more uniform, and the sterilization, extraction or modification effect is better; (4) the research on the continuous flow circulation system is more instructive for industrialization and is oriented towards future industrial development.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a continuous flow device for improving liquid heating uniformity based on radio frequency;

FIG2 is a partial cross-sectional view of the reaction chamber.

In the figure: 1. DC power supply; 2. servo motor; 3. coupling; 4. screw shaft; 5. support seat; 6. reaction chamber; 7. radio frequency generator; 8. outflow pipe; 9. optical fiber temperature measurement; 10. three-way pipe joint; 11. material collection box; 12. circulation pipe; 13. input pipe; 14. material box; 15. agitator; 16. peristaltic pump; 17. 32 single chip microcomputer; 18. drive; 19. end cover; 20. sealing ring; 21. ceramic bearing; 22. bearing seat; 23. USH fluororubber lip sealing ring; 24. spiral blade.

Detailed ways

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Example

Please refer to FIG. 1 . The utility model provides a continuous flow device for improving the uniformity of liquid heating based on radio frequency. The device comprises a reaction chamber 6 and a servo motor 2. The reaction chamber 6 is fixedly connected with the servo motor 2 in the horizontal direction. The servo motor 2 is controlled by the power supply 1, the drive 18 and the 32 single chip microcomputer 17 for speed and direction. The servo motor 2 is connected with the coupling 3. The coupling 3 is connected with the spiral shaft 4 in the reaction chamber. The spiral shaft 4 is supported externally by the support seat 5. The spiral shaft 4 is supported in the chamber by a ceramic bearing 21. The ceramic bearing 21 is fixed by the end cover 19, the spiral shaft 4 and the bearing seat 22. The end cover 19 and the bearing seat 22 are sealed by a sealing ring 20. The spiral blade 24 is fixed on the spiral shaft for stirring. The left end of the reaction chamber 6 is connected with a solution input pipeline 13. The solution input pipeline 13 is provided with pressure by a peristaltic pump 16. The peristaltic pump 16 is connected with a material box 14. The material box 14 is provided with a stirring device 15 for mixing materials of different forms. An air pressure balance opening is provided at the top of the reaction chamber 6. The right end of the reaction chamber 6 is connected to a solution output pipe 8, which is connected to a three-way pipe joint 10. The three-way pipe joint 10 determines the switch of the three-way pipe joint according to the temperature of the solution measured by the optical fiber 9. If the temperature does not reach the set temperature, the solution flows from the three-way pipe joint 10 through the circulation pipe 12 into the material box 14. If the temperature reaches the set temperature, the solution flows from the three-way pipe joint 10 into the material collection box 11.

As an embodiment of the utility model, a ceramic bearing is used to support the spiral shaft in the reaction chamber to ensure that the bearing will not be heated in the radio frequency cavity.

As an embodiment of the utility model, the rotary seal between the reaction chamber and the spiral shaft adopts a USH fluororubber lip seal ring for dynamic sealing to ensure that the solution will not leak out.

As an embodiment of the utility model, the upper part of the reaction chamber is provided with a vent hole to balance the internal and external air pressures, thereby ensuring that the solution can flow continuously; the reaction chamber is placed at the center of the RF reactor plate and adopts RF heating, which can be used to explore the effect of continuous flow and mixing on the heating uniformity of the solution.

As an embodiment of the utility model, the spiral blade is composed of a plurality of blades. Blades of different shapes and sizes can be used for different test materials, and are also easy to replace and clean.

The specific use process of the utility model is as follows:

The spiral blade 24 is installed on the spiral shaft 4, and the lip seals 23 are used at both ends to seal the solution. The bearing seat 22 is installed on the reaction chamber 6 through a threaded connection, and then the ceramic bearing 21 and the end cover 19 are fixed. After the input pipe 13 and the output pipe 8 are connected to the reaction chamber 6, the peristaltic pump 16 is turned on to perform a sealing test. After ensuring that the sealing is good, the reaction chamber 6 is placed in the radio frequency generator 7, and the test material is placed in the material box 14. The stirrer 15 is used to fully stir and mix, and the radio frequency generator 7 is turned on for preheating. The code for specifying the direction and speed is input into the 32 single-chip microcomputer 17, and the power supply 1 is turned on for detection and then temporarily turned off. The peristaltic pump 16 is turned on to pump the mixed solution into the reaction chamber 6. When the mixed solution After the liquid reaches a certain height, start the RF generator 7, turn on the power supply 1 at the same time to rotate the spiral shaft 4, and the spiral blades 24 mix and stir the solution in the cavity while the solution flows continuously, and the RF heats it. The outlet direction optical fiber 9 detects the temperature of the solution in the output pipe 8. When the temperature of the solution is lower than the set temperature, the three-way pipe joint 10 leads to the circulation pipeline 12, and the solution flows to the material box 14 through the circulation pipeline 12. After mixing, it continues to be pumped into the reaction chamber 6 through the peristaltic pump 16 for RF heating. When the temperature of the solution reaches the set temperature, the three-way pipe joint 10 leads to the material collection box 11. After all the materials are heated to the specified temperature, turn off the RF generator 7, turn off the power supply 1, and turn off the peristaltic pump 16. After the test, turn on the peristaltic pump 16 and rinse with high-speed tap water.

Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. A continuous flow device based on radio frequency for improving the uniformity of liquid heating, characterized in that: a reaction chamber (6) and a servo motor (2), the reaction chamber (6) is fixedly connected with the servo motor (2) in the horizontal direction, the servo motor (2) is controlled by a power supply (1), a drive (18) and a 32-bit single chip microcomputer (17) for speed and direction, the servo motor (2) is connected to a coupling (3), the coupling (3) is connected to a screw shaft (4) in the reaction chamber, the screw shaft (4) is supported by a support seat (5), the screw shaft (4) is supported in the chamber by a ceramic bearing (21), the ceramic bearing (21) is fixed by an end cover (19), the screw shaft (4) and a bearing seat (22), the bearing seat (22) is fixed to the reaction chamber (6) by a threaded connection, the end cover (19) and the bearing seat (22) are sealed by a sealing ring (20), the screw shaft (4) is fixed The reaction chamber (6) is stirred by a fixed spiral blade (24). The left end of the reaction chamber (6) is connected to a solution input pipe (13). The solution input pipe (13) is provided with pressure by a peristaltic pump (16). The peristaltic pump (16) is connected to a material box (14). The material box (14) is provided with a stirring device (15) for mixing materials of different forms. An air pressure balance opening is provided at the top of the reaction chamber (6). The opening is removable. The right end of the reaction chamber (6) is connected to a solution output pipe (8). The solution output pipe (8) is connected to a three-way pipe joint (10). The three-way pipe joint (10) determines the switch of the three-way according to the temperature of the solution measured by the optical fiber (9). If the temperature does not reach the set temperature, the solution flows from the three-way pipe joint (10) through the circulation pipe (12) into the material box (14). If the temperature reaches the set temperature, the solution flows from the three-way pipe joint (10) into the material collection box (11). 2. According to claim 1, a radio frequency based continuous flow device for improving liquid heating uniformity is characterized in that: the spiral shaft (4) is supported by a ceramic bearing (21). 3. According to claim 1, a radio frequency based continuous flow device for improving liquid heating uniformity is characterized in that: the spiral shaft (4) and the reaction chamber (6) are dynamically sealed by a USH fluororubber lip seal (23). 4. According to claim 1, a continuous flow device based on radio frequency for improving uniformity of liquid heating is characterized in that: a vent hole is opened above the reaction chamber (6), and the reaction chamber (6) is placed at the center of the plate of the radio frequency reactor (7). 5. According to claim 1, a continuous flow device based on radio frequency for improving uniformity of liquid heating is characterized in that the spiral blades (24) on the spiral shaft (4) can be replaced with blades of different shapes and sizes according to different research contents.