A pear polyphenol extraction liquid spray drying device with anti-sticking wall function

Abstract

This invention discloses a spray drying device for pear polyphenol extract with anti-sticking function, including a main drying chamber, a detachable mounting cover installed on the main drying chamber, an atomization system unit installed on the main drying chamber, and a hot air supply unit installed on the mounting cover. It also includes a main drive assembly and a reciprocating drive assembly installed on the main drying chamber, a main transmission gear rotatably connected to the main drying chamber, and a pipeline assembly and a sealing assembly installed on the mounting cover. By setting the reciprocating drive assembly to drive the sliding bracket and the striking plate body to strike the main drying chamber, a continuous and uniform mechanical striking is achieved. Compared with the traditional method of manually striking with a rubber hammer, the striking force and frequency are more uniform, avoiding damage to the main drying chamber wall caused by uneven manual striking force. Simultaneously, it achieves automated wall cleaning through striking throughout the drying process, completely replacing manual wall cleaning operations and significantly reducing the operational burden on workers.

Description

Technical Field

[0001] This invention relates to the field of pear polyphenol technology, specifically to a spray drying device for pear polyphenol extract with anti-sticking function. Background Technology

[0002] Pear polyphenols, a highly valuable natural active ingredient, are derived from pears, a common fruit in our daily lives. In the process of extracting pear polyphenols, in order to obtain a product form that is easy to store, transport and use, spray drying equipment is usually used for the extract.

[0003] In existing technologies, polyphenols, as a natural active ingredient extracted from pears, contain a large number of hydrophilic groups such as hydroxyl and carboxyl groups in their molecular structure, resulting in extremely strong adhesion of the material during spray drying. Common drying devices rely solely on mechanical scraping devices. However, in actual use, as the drying process continues, the moisture in the adhesive layer further evaporates, and the pear polyphenol molecules form a three-dimensional network structure through hydrogen bonds, van der Waals forces, and other forces, causing the material to gradually harden and clump together, forming a hard adhesive layer. It is difficult to remove the hardened, sticky material by simply relying on mechanical scraping devices or airflow. In traditional operations, operators need to periodically use rubber hammers to tap the tower wall, which greatly increases the workload of the staff. Summary of the Invention

[0004] The purpose of this invention is to provide a spray drying device for pear polyphenol extract with anti-sticking function, so as to solve the problem mentioned in the background art that pear polyphenol hardens and clumps into a hard adhesion layer, which cannot be removed by conventional scraping and airflow, and requires manual knocking on the tower wall, which greatly increases the operating burden of workers.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a spray drying device for pear polyphenol extract with anti-sticking function, comprising a main drying chamber, a detachable mounting cover mounted on the main drying chamber, an atomization system unit mounted on the main drying chamber, and a hot air supply unit mounted on the mounting cover; further comprising a main drive assembly and a reciprocating drive assembly mounted on the main drying chamber, a main transmission gear rotatably connected to the main drying chamber, a pipeline assembly and a sealing assembly mounted on the mounting cover, a mounting seat assembly mounted on the main transmission gear, an inner scraper body mounted on the mounting seat assembly, a flow regulating valve body mounted on the hot air supply unit, a vacuum extraction unit mounted on the main drying chamber, a sliding bracket slidably connected to the main drying chamber, and a striking plate body mounted on the sliding bracket; the striking plate body is connected to the reciprocating drive assembly, and the main transmission gear is connected to the output end of the main drive assembly.

[0006] In use, the main drive assembly can drive the main transmission gear to rotate. When the main transmission gear rotates, it can drive the mounting base assembly to rotate. Through the reciprocating drive assembly, it can drive the sliding bracket to slide back and forth, causing the striking plate body to strike the main drying chamber. The mounting base assembly can drive the inner scraper body to clean the inner wall of the main drying chamber. The flow regulating valve body can limit the flow rate of hot air entering the hot air supply unit.

[0007] In the preferred embodiment of this technical solution, a rotating groove adapted to the main drive gear is provided on the main drying chamber, and the main drive gear is rotatably connected to the rotating groove.

[0008] In a preferred embodiment of this technical solution, the main drive assembly includes a first motor fixedly mounted on the main drying chamber and a first gear fixedly connected to the output end of the first motor, with the main drive gear meshing with the first gear.

[0009] According to the preferred embodiment of this technical solution, the reciprocating drive assembly includes a rotating disk rotatably connected to the main drying chamber, a second gear and a fixed rod fixedly installed on the rotating disk, and a connecting block fixedly installed on the sliding bracket. The fixed rod is slidably connected to the connecting block, and the second gear meshes with the main drive gear. When the second gear rotates, it can drive the rotating disk to rotate. When the rotating disk rotates, it pushes the connecting block through the fixed rod, thereby driving the sliding bracket to reciprocate.

[0010] In a preferred embodiment of this technical solution, the connecting block has a connecting groove adapted to the fixing rod, and the fixing rod is slidably connected to the connecting groove.

[0011] According to the preferred embodiment of this technical solution, the mounting bracket assembly includes a mounting bracket body mounted on the main drive gear and a fastening bolt threaded through the main drive gear and connected to the mounting bracket body.

[0012] Based on the preferred embodiment of this technical solution, the main drive gear is provided with several sets of mounting slots that are compatible with the fastening bolts, and the fastening bolts are threaded through the mounting slots and connected to the mounting base body.

[0013] According to the preferred embodiment of this technical solution, the pipeline assembly includes a fixed pipeline fixedly installed on the mounting cover and a nozzle body fixedly installed on the fixed pipeline, with one end of the fixed pipeline connected to the atomization system unit.

[0014] According to the preferred embodiment of this technical solution, the sealing assembly includes a first sealing strip body and a second sealing strip body fixedly installed on the mounting cover, and both the first sealing strip body and the second sealing strip body are attached to the main drying chamber.

[0015] According to the preferred embodiment of this technical solution, the vacuum extraction unit includes a connecting pipe fixedly installed on the main drying chamber, as well as a vacuum sensor body and a vacuum valve body installed on the connecting pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. By setting up a reciprocating drive component to drive the sliding bracket and the striking plate body to strike the inner cavity of the main drying chamber, a continuous and uniform mechanical striking is formed. Compared with the traditional method of manually striking with a rubber hammer, the striking force and frequency are more uniform, avoiding damage to the main drying chamber wall caused by uneven striking force. At the same time, it realizes the automation of the entire drying process by striking and cleaning the wall, completely replacing the manual wall cleaning operation and greatly reducing the operating burden of the staff.

[0018] 2. The mounting bracket and inner scraper body adopt a modular design, and the required number can be added according to actual needs to enhance the scraping and cleaning effect without replacing the entire cleaning structure. This makes it more adaptable and can be flexibly matched to different production conditions.

[0019] 3. The first sealing strip body and the second sealing strip body are used together. Compared with the traditional single sealing strip design, the double sealing strip design further enhances the sealing performance. By fitting with the groove on the main drying chamber, the sealing contact is more complete and tighter, which significantly improves the sealing performance of the device during operation, prevents the leakage of hot air and atomized pear polyphenol extract in the main drying chamber, and avoids material waste and hot air loss.

[0020] 4. By setting the flow regulating valve body, the cross-sectional area of ​​hot air circulation can be adjusted in real time, and the hot air volume and flow rate can be precisely controlled to keep the hot air field in the drying chamber uniform and stable, avoiding uneven drying of pear polyphenols and increased wall adhesion caused by wind speed fluctuations.

[0021] 5. By setting up a vacuum extraction component, a stable and controllable negative pressure working environment can be provided for the spray drying of pear polyphenol extract, effectively reducing the impact of the drying process on the active ingredients of pear polyphenols and better preserving the natural efficacy of the product. This component can monitor and maintain the pressure stability in the chamber in real time, so that the drying conditions are consistent and the product quality uniformity is improved. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of one embodiment of a spray drying device for pear polyphenol extract with anti-wall-sticking function according to the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the opening structure of the mounting cover;

[0024] Figure 3 for Figure 1 Schematic diagram of the mounting cover and its connected components;

[0025] Figure 4 for Figure 1 Schematic diagram of the main drying chamber and its connected components;

[0026] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure of the main drying chamber and mounting cover;

[0027] Figure 6 This is a schematic diagram of the mounting bracket assembly structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the reciprocating drive component structure of the present invention;

[0029] Figure 8 This is an exploded view of the reciprocating drive component of the present invention;

[0030] Figure 9 This is a schematic diagram of the main drive component structure of the present invention;

[0031] Figure 10 This is a schematic diagram of the vacuum extraction unit structure of the present invention.

[0032] In the diagram: 11. Main drying chamber; 12. Mounting cover; 13. Atomization system unit; 14. Hot air supply unit; 21. Main drive gear; 22. Inner scraper body; 23. Sliding bracket; 24. Striking plate body; 25. First motor; 26. First gear; 27. Mounting base body; 28. Fastening bolt; 29. ​​Second gear; 210. Rotating disk; 211. Fixing rod; 212. Connecting block; 31. Fixing pipeline; 32. Nozzle body; 33. First sealing strip body; 34. Second sealing strip body; 35. Flow regulating valve body; 36. Connecting pipeline; 37. Vacuum sensor body; 38. Vacuum valve body. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1 - Figure 10The present invention provides an embodiment of a spray drying device for pear polyphenol extract with anti-sticking function, comprising a main drying chamber 11, a detachable mounting cover 12 mounted on the main drying chamber 11, an atomization system unit 13 mounted on the main drying chamber 11, and a hot air supply unit 14 mounted on the mounting cover 12. It also includes a main drive assembly and a reciprocating drive assembly mounted on the main drying chamber 11, a main transmission gear 21 rotatably connected to the main drying chamber 11, a pipeline assembly and a sealing assembly mounted on the mounting cover 12, a mounting seat assembly mounted on the main transmission gear 21, an inner scraper body 22 mounted on the mounting seat assembly, a flow regulating valve body 35 mounted on the hot air supply unit 14, a vacuum extraction unit mounted on the main drying chamber 11, a sliding bracket 23 slidably connected to the main drying chamber 11, and a striking plate body 24 mounted on the sliding bracket 23. The striking plate body 24 is connected to the reciprocating drive assembly, and the main transmission gear 21 is connected to the output end of the main drive assembly.

[0035] The main drive assembly can drive the main transmission gear 21 to rotate. When the main transmission gear 21 rotates, it can drive the mounting base assembly to rotate. The reciprocating drive assembly can drive the sliding bracket 23 to slide back and forth, driving the striking plate body 24 to strike the main drying chamber 11. The mounting base assembly can drive the inner scraper body 22 to clean the inner wall of the main drying chamber 11. The flow regulating valve body 35 can limit the flow rate of hot air entering the hot air supply unit 14.

[0036] When using this invention, it needs to be combined with an external conveying structure, an external hot air conveying structure, an external control terminal, and an external vacuum pump. The atomization system unit 13 is connected to the external conveying structure, and the material is conveyed into the atomization system unit 13 through the external conveying structure for atomization. The external hot air conveying structure is connected to the hot air supply unit 14, and hot air is conveyed into the main drying chamber 11 from one side and drawn out from the other side through the hot air supply unit 14. The flow regulating valve body 35 can limit the flow rate of the hot air entering the hot air supply unit 14. The flow regulating valve body 35 changes the cross-sectional area of ​​the hot air flow channel in the hot air supply unit 14 by adjusting the opening of its own valve core, thereby limiting the flow rate of the hot air through the hot air supply unit 14 and realizing the circulation of hot air in the main drying chamber 11. The dried material can be discharged from the bottom outlet of the main drying chamber 11.

[0037] The vacuum extraction unit works in conjunction with an external control unit, which is a computer or controller that can receive signals in real time. When the external vacuum pump is started, the external control unit controls the vacuum extraction unit to ensure the vacuum level in the main drying chamber 11 and improve the atomization effect of the material.

[0038] After the material is atomized, it is sprayed into the main drying chamber 11 and dried under the action of circulating hot air. At the same time, the main drive assembly is started, which drives the main transmission gear 21 to rotate on the main drying chamber 11. During the rotation of the main transmission gear 21, the mounting base assembly moves synchronously. The mounting base assembly drives the inner scraper body 22 to act on the inner wall of the main drying chamber 11 to complete the scraping and cleaning of the cavity wall.

[0039] While the main drive gear 21 rotates, the reciprocating drive assembly drives the sliding bracket 23 to slide back and forth on the main drying chamber 11. The sliding bracket 23 drives the striking plate body 24 to move synchronously, so that the striking plate body 24 continuously strikes the inner cavity of the main drying chamber 11. The scraping action of the inner scraper body 22 is synchronized with the striking action of the striking plate body 24. During the entire drying process of pear polyphenol extract, the inner wall of the main drying chamber 11 is cleaned, so as to achieve the effect of preventing the device from sticking to the wall.

[0040] An external vacuum pump is connected to a vacuum extraction unit. During use, the corresponding component of the vacuum extraction unit operates to detect the vacuum level inside the main drying chamber 11. When the external vacuum pump is started, the main drying chamber 11 is pumped to a preset vacuum level to ensure a stable vacuum level during the drying process.

[0041] The mounting cover 12 adopts a detachable design, which, together with the sealing component, can fill the gaps between the main drying chambers 11 and ensure the sealing of the main drying chambers 11 during operation.

[0042] Under reduced pressure, this device (anti-sticking + reduced pressure, i.e., equipped with an inner scraper body 22, a striking plate body 24, and reduced pressure function) has the following wall adhesion rate: ≤3% (measured range 1.2%-2.8%), and pear polyphenol activity retention rate ≥90% (measured range 90.5%-93.2%). The reduced pressure environment reduces the tendency of materials to stick to the wall. At the same time, the scraping of the inner scraper body 22 and the striking of the striking plate body 24 work synchronously to remove the materials attached to the cavity wall in time. The synergistic effect of the two significantly reduces the wall adhesion rate. Moreover, the drying temperature under reduced pressure is more moderate, maximizing the retention of pear polyphenol activity. The overall effect is far superior to the previous two.

[0043] Please see Figure 4 A further solution based on this embodiment is as follows: a rotating groove adapted to the main drive gear 21 is provided on the main drying chamber 11. The main drive gear 21 is rotatably connected to the rotating groove. The rotating groove provides rotational support for the main drive gear 21 and limits its rotation trajectory, so that the main drive gear 21 is always in the preset transmission position. The adaptation design between the rotating groove and the main drive gear 21 ensures the stability and smoothness of the rotation of the main drive gear 21 and avoids deviation or jamming during the rotation process.

[0044] Please see Figure 4 and Figure 9A further solution based on this embodiment is as follows: The main drive assembly includes a first motor 25 fixedly mounted on the main drying chamber 11 and a first gear 26 fixedly connected to the output end of the first motor 25. The main drive gear 21 meshes with the first gear 26. The first motor 25 outputs rotational power. Through the meshing of the first gear 26 and the main drive gear 21, the power is stably transmitted to the main drive gear 21, driving it to rotate synchronously. The gear meshing transmission method has high transmission efficiency and low power loss, which can provide continuous and stable power support for the wall cleaning assembly.

[0045] Please see Figure 7 - Figure 8 A further embodiment of this solution is as follows: the reciprocating drive assembly includes a rotating disk 210 rotatably connected to the main drying chamber 11, a second gear 29 and a fixed rod 211 fixedly mounted on the rotating disk 210, and a connecting block 212 fixedly mounted on the sliding bracket 23. The fixed rod 211 is slidably connected to the connecting block 212. The second gear 29 meshes with the main drive gear 21. When the second gear 29 rotates, it can drive the rotating disk 210 to rotate. When the rotating disk 210 rotates, it pushes the connecting block through the fixed rod 211. 212 drives the sliding bracket 23 to move back and forth. The power of the main drive gear 21 is transmitted to the rotating disk 210 through the second gear 29. The rotating disk 210 rotates and drives the fixed rod 211 to make a circular motion. The sliding cooperation between the fixed rod 211 and the connecting block 212 converts the circular motion into the linear reciprocating motion of the sliding bracket 23. The transformation of the motion form is achieved through a purely mechanical structure. The stable reciprocating linear motion can provide uniform striking power to the striking plate body 24, ensuring the effect of striking and cleaning the wall, and effectively shaking off the material stuck to the cavity wall.

[0046] Please see Figure 8 A further solution based on this embodiment is as follows: a connecting groove adapted to the fixed rod 211 is provided on the connecting block 212. The fixed rod 211 is slidably connected to the connecting groove. The connecting groove provides sliding space for the circular motion of the fixed rod 211, so that the fixed rod 211 can smoothly push the connecting block 212 during rotation, realizing a smooth conversion from circular motion to linear motion. The adaptation design of the connecting groove and the fixed rod 211 avoids the situation of separation when the two are engaged.

[0047] Please see Figure 6 A further solution based on this embodiment is as follows: the mounting base assembly includes a mounting base body 27 mounted on the main drive gear 21 and a fastening bolt 28 threadedly connected to the mounting base body 27 through the main drive gear 21. The mounting base body 27 provides mounting support for the inner scraper body 22. The fastening bolt 28 detachably fixes the mounting base body 27 to the main drive gear 21 through a threaded connection. By using the threaded fixing method of the fastening bolt 28, the disassembly and assembly of the mounting base body 27 is simple and convenient for replacing the inner scraper body 22.

[0048] Please see Figure 4 A further solution based on this embodiment is as follows: the main drive gear 21 is provided with several sets of mounting slots that are adapted to the fastening bolts 28. The fastening bolts 28 pass through the mounting slots and are threaded onto the mounting base body 27. The several sets of mounting slots provide different mounting points for the fastening bolts 28. By adjusting the mounting slots of the fastening bolts 28, the mounting position of the mounting base body 27 on the main drive gear 21 can be changed. The multiple sets of mounting slots realize the adjustability of the mounting position of the mounting base assembly. The number of inner scraper bodies 22 can be adjusted as needed to ensure the scraping and cleaning effect and meet different usage requirements.

[0049] Please see Figure 1 - Figure 3 A further solution based on this embodiment is as follows: the pipeline assembly includes a fixed pipeline 31 fixedly installed on the mounting cover 12 and a nozzle body 32 fixedly installed on the fixed pipeline 31. One end of the fixed pipeline 31 is connected to the atomization system unit 13. After the atomization system unit 13 atomizes the pear polyphenol extract, the atomized material is transported to the nozzle body 32 through the fixed pipeline 31. The nozzle body 32 sprays the atomized material into the main drying chamber 11 and completes the drying operation with the help of hot air. The fixed pipeline 31 is fixedly connected to the mounting cover 12. The material can be sprayed into the inner cavity of the main drying chamber 11 for processing through multiple nozzle bodies 32.

[0050] Please see Figure 1 - Figure 5 A further solution based on this embodiment is as follows: the sealing assembly includes a first sealing strip body 33 and a second sealing strip body 34 fixedly installed on the mounting cover 12. Both the first sealing strip body 33 and the second sealing strip body 34 are attached to the main drying chamber 11. The main drying chamber 11 has grooves that are adapted to the first sealing strip body 33 and the second sealing strip body 34. In use, the first sealing strip body 33 and the second sealing strip body 34 contact the grooves to fill the gap between the mounting cover 12 and the main drying chamber 11. The double sealing strip design can significantly improve the sealing effect and prevent leakage problems compared with the traditional sealing strip design.

[0051] Please see Figure 1 - Figure 5A further solution based on this embodiment is as follows: The vacuum extraction unit includes a connecting pipe 36 fixedly installed on the main drying chamber 11, and a vacuum sensor body 37 and a vacuum valve body 38 installed on the connecting pipe 36. The connecting pipe 36 is connected to an external vacuum pump. When drying is started, the vacuum pump is turned on synchronously to realize the connection between the main drying chamber 11 and the vacuum extraction unit. The vacuum valve body 38 is used to control the opening and closing of the connecting pipe 36. The vacuum sensor body 37 detects the vacuum degree in the connecting pipe 36 in real time and feeds it back to the control terminal to adjust the vacuum extraction state.

[0052] Working principle: When using this device, it needs to work in conjunction with the external conveying structure, the external hot air conveying structure and the external vacuum pump. The components of the device operate in coordination according to the preset logic to complete the spray drying and anti-sticking operation of the pear polyphenol extract.

[0053] First, the external conveying structure is connected to the atomization system unit 13, the external hot air conveying structure is connected to the hot air supply unit 14, and the external vacuum pump is connected to the vacuum extraction unit's connecting pipe 36 to ensure that each external structure and corresponding component of the device are connected in place. At the same time, the mounting cover 12 is installed on the main drying chamber 11 through a detachable design. The first sealing strip body 33 and the second sealing strip body 34 in the sealing assembly fit into the corresponding grooves of the main drying chamber 11 to fill the gap between the mounting cover 12 and the main drying chamber 11, ensuring the sealing of the main drying chamber 11.

[0054] After the equipment is started, the pear polyphenol extract is transported to the atomization system unit 13 through the external conveying structure. The atomization system unit 13 atomizes the material. The atomized material is then transported to the nozzle body 32 through the fixed pipeline 31 in the pipeline assembly, and sprayed into the main drying chamber 11 by the nozzle body 32.

[0055] At the same time, the external hot air conveying structure delivers hot air to the hot air supply unit 14. The flow regulating valve body 35 on the hot air supply unit 14 adjusts its own valve core opening to change the cross-sectional area of ​​the hot air flow channel and limit the flow rate of the hot air entering the hot air supply unit 14. The adjusted hot air is sent into the main drying chamber 11 from one side of the hot air supply unit 14 and then drawn out from the other side, realizing the circulation of hot air in the main drying chamber 11 and providing drying conditions for the atomized material.

[0056] The vacuum sensor body 37 and the vacuum valve body 38 are used in conjunction with an external control unit, which is specifically a computer or controller. It can receive the detection signal from the vacuum sensor body 37 in real time and automatically control the opening and closing of the vacuum valve body 38 according to preset parameters, so as to realize the automatic adjustment and constant control of the vacuum degree inside the main drying chamber 11, and improve the intelligence level and ease of operation of the device.

[0057] When the external vacuum pump is started, the vacuum valve body 38 in the vacuum extraction unit is opened by the external control terminal, so that the connecting pipe 36 is in the connected state. The vacuum sensor body 37 detects the vacuum degree in the main drying chamber 11 in real time and feeds back the detection signal to the control terminal. The control terminal adjusts the working state of the external vacuum pump to pump the main drying chamber 11 to the preset vacuum degree and maintain the vacuum degree stable during the drying process.

[0058] During the material drying process, the first motor 25 in the main drive assembly is started. The first motor 25 outputs rotational power, which drives the first gear 26 on its output end to rotate. The first gear 26 meshes with the main drive gear 21, transmitting power to the main drive gear 21, causing the main drive gear 21 to rotate in the rotating groove of the main drying chamber 11. The rotating groove provides rotational support for the main drive gear 21 and limits its rotational trajectory, ensuring that the main drive gear 21 rotates stably and smoothly.

[0059] When the main drive gear 21 rotates, it drives the mounting base body 27, which is fixed by the fastening bolt 28, to rotate synchronously. The fastening bolt 28 passes through the mounting groove on the main drive gear 21 and is threadedly connected to the mounting base body 27. The mounting base body 27 drives the inner scraper body 22 installed on it to move synchronously. The inner scraper body 22 acts on the inner wall of the main drying chamber 11 to scrape and clean the chamber wall.

[0060] At the same time, the main drive gear 21 meshes with the second gear 29 in the reciprocating drive assembly, driving the second gear 29 to rotate. The second gear 29 drives the rotating disk 210 fixedly connected to it to rotate. The fixed rod 211 on the rotating disk 210 then makes a circular motion. The fixed rod 211 slides in the connecting groove of the connecting block 212, pushing the connecting block 212 to move back and forth. The connecting block 212 drives the sliding bracket 23 fixedly connected to it to slide back and forth on the main drying chamber 11. The sliding bracket 23 then drives the striking plate body 24 installed on it to move synchronously, realizing the continuous striking of the striking plate body 24 on the inner cavity of the main drying chamber 11.

[0061] The scraping action of the inner scraper body 22 and the striking action of the striking plate body 24 are carried out synchronously. During the entire process of drying pear polyphenol extract, the inner wall of the main drying chamber 11 is cleaned to achieve the anti-sticking effect of the device. The dried material is discharged from the bottom outlet of the main drying chamber 11.

[0062] Under reduced pressure, this device (anti-sticking + reduced pressure, i.e., equipped with an inner scraper body 22, a striking plate body 24, and reduced pressure function) has the following wall adhesion rate: ≤3% (measured range 1.2%-2.8%), and pear polyphenol activity retention rate ≥90% (measured range 90.5%-93.2%). The reduced pressure environment reduces the tendency of materials to stick to the wall. At the same time, the scraping of the inner scraper body 22 and the striking of the striking plate body 24 work synchronously to remove the materials attached to the cavity wall in time. The synergistic effect of the two significantly reduces the wall adhesion rate. Moreover, the drying temperature under reduced pressure is more moderate, maximizing the retention of pear polyphenol activity. The overall effect is far superior to the previous two.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spray drying device for pear polyphenol extract with anti-sticking function, comprising a main drying chamber (11), a detachable mounting cover (12) mounted on the main drying chamber (11), an atomizing system unit (13) mounted on the main drying chamber (11), and a hot air supply unit (14) mounted on the mounting cover (12), characterized in that: It also includes a main drive assembly and a reciprocating drive assembly installed on the main drying chamber (11), a main transmission gear (21) rotatably connected to the main drying chamber (11), a pipeline assembly and a sealing assembly installed on the mounting cover (12), a mounting seat assembly installed on the main transmission gear (21), an inner scraper body (22) installed on the mounting seat assembly, a flow regulating valve body (35) installed on the hot air supply unit (14), a vacuum extraction unit installed on the main drying chamber (11), a sliding bracket (23) slidably connected to the main drying chamber (11), and a striking plate body (24) installed on the sliding bracket (23). The striking plate body (24) is connected to the reciprocating drive assembly, and the main transmission gear (21) is connected to the output end of the main drive assembly. When in use, the main drive assembly can drive the main drive gear (21) to rotate. When the main drive gear (21) rotates, it can drive the mounting base assembly to rotate. The reciprocating drive assembly can drive the sliding bracket (23) to slide back and forth, driving the striking plate body (24) to strike the main drying chamber (11). The mounting base assembly can drive the inner scraper body (22) to clean the inner wall of the main drying chamber (11). The flow regulating valve body (35) can limit the flow rate of hot air entering the hot air supply unit (14).

2. The spray drying device for pear polyphenol extract with anti-sticking function according to claim 1, characterized in that: The main drying chamber (11) has a rotating groove that is compatible with the main drive gear (21), and the main drive gear (21) is rotatably connected to the rotating groove.

3. The spray drying device for pear polyphenol extract with anti-sticking function according to claim 1, characterized in that: The main drive assembly includes a first motor (25) fixedly mounted on the main drying chamber (11) and a first gear (26) fixedly connected to the output end of the first motor (25), with the main drive gear (21) meshing with the first gear (26).

4. The spray drying device for pear polyphenol extract with anti-sticking function according to claim 1, characterized in that: The reciprocating drive assembly includes a rotating disk (210) rotatably connected to the main drying chamber (11), a second gear (29) and a fixed rod (211) fixedly mounted on the rotating disk (210), and a connecting block (212) fixedly mounted on the sliding bracket (23). The fixed rod (211) is slidably connected to the connecting block (212), and the second gear (29) meshes with the main drive gear (21). When the second gear (29) rotates, it can drive the rotating disk (210) to rotate. When the rotating disk (210) rotates, it pushes the connecting block (212) through the fixed rod (211), thereby driving the sliding bracket (23) to reciprocate.

5. The spray drying device for pear polyphenol extract with anti-wall adhesion function according to claim 4, characterized in that: The connecting block (212) has a connecting groove that matches the fixing rod (211), and the fixing rod (211) is slidably connected to the connecting groove.

6. The spray drying device for pear polyphenol extract with anti-sticking function according to claim 1, characterized in that: The mounting bracket assembly includes a mounting bracket body (27) mounted on the main drive gear (21) and a fastening bolt (28) threaded through the main drive gear (21) onto the mounting bracket body (27).

7. The spray drying device for pear polyphenol extract with anti-sticking function according to claim 6, characterized in that: The main drive gear (21) has several sets of mounting slots that are compatible with the fastening bolts (28). The fastening bolts (28) pass through the mounting slots and are threaded onto the mounting base body (27).

8. The spray drying device for pear polyphenol extract with anti-sticking function according to claim 1, characterized in that: The piping assembly includes a fixed piping (31) fixedly mounted on the mounting cover (12) and a nozzle body (32) fixedly mounted on the fixed piping (31), with one end of the fixed piping (31) connected to the atomizing system unit (13).

9. The spray drying device for pear polyphenol extract with anti-sticking function according to claim 1, characterized in that: The sealing assembly includes a first sealing strip body (33) and a second sealing strip body (34) fixedly mounted on the mounting cover (12), both of which are attached to the main drying chamber (11).

10. The spray drying device for pear polyphenol extract with anti-sticking function according to claim 1, characterized in that: The vacuum extraction unit includes a connecting pipe (36) fixedly installed on the main drying chamber (11), and a vacuum sensor body (37) and a vacuum valve body (38) installed on the connecting pipe (36).

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