Konjak dietary fiber low-temperature superfine grinding and spray drying integrated process

Abstract

The invention belongs to the technical field of konjak dietary fiber processing, and particularly relates to a konjak dietary fiber low-temperature superfine grinding and spray-drying integrated process, in particular to a konjak dietary fiber low-temperature superfine grinding and spray-drying integrated device which comprises a spray-drying mechanism and a low-temperature superfine grinding mechanism fixedly connected to the upper side of the spray-drying mechanism. A discharging port of the low-temperature superfine grinding mechanism communicates with a feeding port of the spray drying mechanism, the spray drying mechanism comprises a cylindrical hollow machine shell, and a discharging pipeline, an atomizing nozzle, a spiral air guiding mechanism and an adjustable cylindrical inner support are installed on the cylindrical hollow machine shell. According to the konjak dietary fiber drying machine, the flow speed of konjak dietary fibers in the cylindrical hollow machine shell can be controlled, it is ensured that the konjak dietary fibers are fully dried, the phenomenon that the konjak dietary fibers are excessively dried is reduced, hot air can be effectively concentrated to heat the konjak dietary fibers, and waste of heat energy is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of konjac dietary fiber processing, and particularly relates to a low-temperature super-micro pulverization and spray drying integrated process for konjac dietary fiber. BACKGROUND

[0002] As a functional ingredient with high water retention, high swelling and low heat, konjac dietary fiber is widely used in food, health care products, medicine and other fields. In the processing, super-micro pulverization and drying are key links, which directly affect the particle size distribution, solubility, activity retention rate and subsequent application performance of the product.

[0003] Currently, the processing of konjac dietary fiber mostly adopts a step-by-step process of "pulverization first and then drying". The super-micro pulverization link often relies on traditional normal-temperature pulverization equipment. Not only is the active ingredient (such as glucosaccharide) in the dietary fiber likely to be denatured due to frictional heat, reducing the product quality, but also the uneven pulverization particle size may affect the subsequent drying efficiency and the uniformity of the final product. The drying link mainly uses hot air drying and vacuum freeze drying. Although hot air drying has a lower cost, the high-temperature environment (usually higher than 80℃) easily causes the hardening of the dietary fiber surface, the loss of nutritional ingredients, and high energy consumption. Although vacuum freeze drying can better retain active ingredients, it has problems such as large equipment investment, long drying period (usually several hours), and low production efficiency, which is difficult to meet the needs of large-scale industrial production. At the same time, the step-by-step process also has defects such as large equipment area, complicated operation process, easy contamination and loss of materials during transfer, etc.

[0004] The low-temperature super-micro pulverization and spray drying integrated process can effectively solve the above problems. On the one hand, low-temperature super-micro pulverization can pulverize konjac dietary fiber into super-micro powder with a particle size of ≤10μm in a low-temperature environment of-20 to-40℃, which not only avoids the thermal denaturation of active ingredients caused by frictional heat, but also improves the retention rate of active substances such as glucosaccharide (more than 90%), and increases the specific surface area of the material, laying a foundation for subsequent rapid drying. On the other hand, spray drying can atomize the super-micro pulverized material into fine droplets (droplet size 50-100μm) and fully contact with low-temperature hot air (50-60℃) to complete drying in a short time, which not only avoids the damage to the material quality caused by high temperature, but also greatly shortens the drying period and improves the production efficiency. At the same time, the integrated design can reduce the material transfer link and reduce the risk of pollution and loss.

[0005] Although some studies have tried to integrate the pulverization and drying links, the hot air flow path of the existing integrated equipment is fixed and cannot adapt to the drying needs of materials with different feeding amounts, resulting in large fluctuations in drying time and poor stability of product quality. At the same time, the heating area is fixed and cannot be flexibly adjusted according to the feeding amount, resulting in serious energy waste when the feeding amount is small and insufficient drying when the feeding amount is large. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated low-temperature ultra-fine pulverization and spray drying process for konjac dietary fiber. This process can control the flow rate of konjac dietary fiber inside a cylindrical hollow casing, ensuring that the konjac dietary fiber is fully dried, reducing the phenomenon of over-drying, and effectively concentrating hot air to heat the konjac dietary fiber, thereby reducing the waste of heat energy.

[0007] The specific technical solution adopted by this invention is as follows: A low-temperature ultrafine pulverization and spray drying integrated device for konjac dietary fiber includes a spray drying mechanism and a low-temperature ultrafine pulverization mechanism fixedly connected to the upper side of the spray drying mechanism. The discharge port of the low-temperature ultrafine pulverization mechanism is connected to the inlet of the spray drying mechanism. The spray drying mechanism includes a cylindrical hollow housing, on which a discharge pipe, an atomizing nozzle, a spiral air guide mechanism, and an adjustable cylindrical inner support are installed. The cylindrical hollow casing has multiple heating treatment zones inside, which are arranged sequentially from the inside to the outside on a horizontal plane. The discharge pipe is fixedly connected to the lower end of the cylindrical hollow casing, and the discharge pipe is connected to the outermost heat treatment zone. A valve is installed on the discharge pipe. The adjustable cylindrical inner support is installed inside the cylindrical hollow casing and is used to fill any number of heating treatment zones. The area filled by the adjustable cylindrical inner support among the multiple heating treatment zones is the invalid heating zone, and the remaining heating treatment zones are the valid heating zones. The atomizing nozzle is fixedly connected to the upper end of the cylindrical hollow housing, and the atomizing nozzle is connected to the discharge port of the low-temperature ultrafine pulverizing mechanism. The atomizing nozzle includes multiple spray outlet sections, and each of the multiple spray outlet sections is respectively opposite to a multiple heat treatment zone; The spray discharge section includes an open state and a closed state. When the spray discharge section is in the open state, it can discharge konjac dietary fiber into the effective heating zone. A hot air inlet pipe is fixedly connected to the side wall of the cylindrical hollow casing; The spiral air guide mechanism is installed inside the cylindrical hollow casing near the inner wall. The spiral air guide mechanism includes multiple spiral segments connected sequentially from bottom to top. Each spiral segment spirals once. The distance between two adjacent spiral segments is the pitch. The pitch of the spiral air guide mechanism is adjustable.

[0008] Furthermore, the adjustable columnar inner support includes multiple filling parts, each of which is used to fill multiple heat treatment zones. Each filling part includes an annular telescopic partition and a vertical adjustment mechanism. The multiple annular telescopic partitions are arranged sequentially from the inside to the outside. An annular top plate is fixedly connected to the upper end of each of the multiple annular telescopic partitions. The vertical adjustment mechanism and the annular top plate are connected by a transmission.

[0009] Furthermore, the outer edge of the inner annular top plate can overlap the inner edge of the outer annular top plate, and the upper side of the annular top plate slopes downward in the order from the direction closest to the axis of the cylindrical hollow casing to the direction away from the axis of the cylindrical hollow casing.

[0010] Furthermore, an additional housing is fixedly connected to the lower side of the cylindrical hollow housing, and the lower end of the annular telescopic partition is fixedly connected to the inner wall of the lower side of the additional housing.

[0011] Furthermore, the vertical adjustment mechanism includes a second electric telescopic rod fixedly connected to the inner wall of the lower side of the auxiliary housing. The piston rod of the second electric telescopic rod is fixedly connected to the annular top plate. Multiple guide rods are fixedly connected to the inner wall of the lower side of the auxiliary housing. The annular top plate is vertically slidably connected to the outside of the guide rods. The annular telescopic partition is an accordion-type telescopic partition.

[0012] Furthermore, the atomizing nozzle includes a feed pipe fixedly connected to the upper side of the interior of the cylindrical hollow housing. The feed pipe serves as a feed inlet and is connected to the discharge outlet of the low-temperature ultrafine pulverizing mechanism. The lower end of the feed pipe is fixedly connected to the nozzle body. The lower side plate of the nozzle body is a spray orifice plate. The spray orifice plate has several atomizing spray holes. A partition plate is fixedly connected inside the nozzle body. The partition plate divides the nozzle body into multiple discharge chambers. The atomizing spray holes on the spray orifice plate are divided into multiple groups. The multiple groups of atomizing spray holes are respectively connected to multiple discharge chambers. The multiple groups of atomizing spray holes serve as multiple spray discharge sections. One of the discharge chambers is directly connected to the feed pipe, while the other discharge chambers are connected to the feed pipe via solenoid valves.

[0013] Furthermore, the spiral air guide mechanism includes a spiral air guide vane, the lower end of which is fixedly connected to the inner wall of the lower side of the cylindrical hollow housing, and an annular hollow upper housing is fixedly connected to the upper side of the cylindrical hollow housing. A first electric telescopic rod is fixedly connected to the upper side of the annular hollow upper housing, and the piston rod of the first electric telescopic rod is drively connected to the upper end of the spiral air guide vane. An annular partition is vertically slidably connected inside the annular hollow upper shell. The upper end of the spiral air guide is fixedly connected to the annular partition, and the output end of the first electric telescopic rod is fixedly connected to the annular partition.

[0014] Furthermore, a spiral mounting base is fixedly connected to the edge of the spiral air guide vane near the inner wall of the cylindrical hollow casing, and a sealing ring is fixedly connected inside the spiral mounting base; The sealing ring has a hollow air storage cavity inside, and an air pump is fixedly connected to the annular hollow shell. The air pump is connected to the hollow air storage cavity of the sealing ring through a hose.

[0015] A low-temperature ultrafine pulverization and spray drying integrated process for konjac dietary fiber includes the following steps: Step 1: Add konjac dietary fiber into the low-temperature ultra-fine grinding mechanism and process the konjac dietary fiber into low-temperature ultra-fine powder. Step 2: The konjac dietary fiber, after being treated with low-temperature ultrafine powder, is fed into the spray drying unit for drying. Step 3: During the drying process, dynamically adjust the effective heating zone range and the spraying range of the atomizing nozzles according to the feed rate of the spray drying mechanism. Step 4: During the drying process, the pitch of the spiral air guide mechanism is dynamically adjusted according to the feed rate of the spray drying mechanism to adjust the flow path of the hot air inside the cylindrical hollow casing. Step 5: After the konjac dietary fiber is dried, open the valve on the discharge pipe to discharge the konjac dietary fiber.

[0016] The technical effects achieved by this invention are as follows: The present invention discloses an integrated low-temperature ultrafine pulverization and spray drying process for konjac dietary fiber. Based on the quantity of konjac dietary fiber discharged from the low-temperature ultrafine pulverization mechanism to the spray drying mechanism, the effective heating zone range, the spraying range of the atomizing nozzle, and the pitch of the spiral air guide mechanism are dynamically adjusted. This allows the konjac dietary fiber entering the cylindrical hollow casing for heating to approach the spiral air guide mechanism, effectively receiving airflow regulation from the spiral air guide mechanism. This controls the flow rate of the konjac dietary fiber inside the cylindrical hollow casing, ensuring thorough drying and reducing over-drying. Furthermore, it effectively concentrates hot air to heat the konjac dietary fiber, reducing heat energy waste. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a cross-sectional structural diagram of the low-temperature ultrafine pulverization mechanism of the present invention; Figure 4 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 5 This is a cross-sectional structural diagram of the present invention; Figure 6 This is the present invention. Figure 5 A magnified view of a section at point B in the middle; Figure 7 This is a side view of the sectional structure of the present invention; Figure 8 This is a cross-sectional structural diagram of the atomizing nozzle of the present invention.

[0018] The attached diagram lists the components represented by each number as follows: 1. Spray drying mechanism; 2. Low-temperature ultrafine pulverizing mechanism; 3. Cylindrical hollow casing; 4. Discharge pipe; 5. Atomizing nozzle; 6. Spiral air guide mechanism; 7. Adjustable cylindrical inner support; 8. Conical top; 9. Annular hollow upper casing; 10. First electric telescopic rod; 11. Annular partition; 12. Spiral air guide vane; 13. Spiral mounting base; 14. Sealing ring; 15. Air pump; 16. Hose; 17. Annular concave shell; 18. Annular top plate; 19. Annular telescopic partition; 20. Guide rod; 21. Additional casing; 22. Second electric telescopic rod; 23. Nozzle body; 24. Feed pipe; 25. Spray orifice plate; 26. Partition plate; 27. Solenoid valve; 28. Hot air inlet pipe. Detailed Implementation

[0019] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0020] like Figures 1-8 As shown, a low-temperature ultrafine pulverization and spray drying integrated device for konjac dietary fiber includes a spray drying mechanism 1 and a low-temperature ultrafine pulverization mechanism 2 fixedly connected to the upper side of the spray drying mechanism 1. The discharge port of the low-temperature ultrafine pulverization mechanism 2 is connected to the inlet of the spray drying mechanism 1. Among them, the low-temperature ultra-fine pulverizing mechanism 2 is used to perform low-temperature ultra-fine pulverizing treatment on konjac dietary fiber, pulverizing the konjac dietary fiber to form ultra-fine powder with a particle size ≤10μm. The low-temperature ultra-fine pulverizing mechanism 2 is a mature existing technology (such as liquid nitrogen low-temperature ultra-fine pulverizer, low-temperature airflow ultra-fine pulverizer, etc.).

[0021] Among them, the spray drying unit 1 is used to dry the konjac dietary fiber after low-temperature ultrafine pulverization.

[0022] like Figures 1-2 and Figure 7 As shown, the spray drying mechanism 1 includes a cylindrical hollow housing 3, on which a discharge pipe 4, an atomizing nozzle 5, a spiral air guide mechanism 6, and an adjustable cylindrical inner support 7 are installed. The cylindrical hollow casing 3 has multiple heating treatment zones inside. These heating treatment zones are arranged sequentially from the inside to the outside on a horizontal plane. Specifically, the first heating treatment zone is located in the middle of the cylindrical hollow casing 3, the second heating treatment zone is located outside the first heating treatment zone, the third heating treatment zone is located outside the second heating treatment zone, and the fourth heating treatment zone is located outside the third heating treatment zone. The multiple heating treatment zones are arranged sequentially to form a target-shaped structure on a horizontal plane.

[0023] like Figures 2-3 and Figures 5-6 As shown, the discharge pipe 4 is fixedly connected to the lower end of the cylindrical hollow casing 3, and the discharge pipe 4 is connected to the outermost heating treatment zone. A valve is installed on the discharge pipe 4. When the valve is opened, the heated konjac dietary fiber can be discharged through the discharge pipe 4.

[0024] In some further embodiments, an annular concave shell 17 is fixedly connected to the lower side of the cylindrical hollow casing 3 and the corresponding position of the outermost heating treatment zone. One end of the discharge pipe 4 is connected to the lower end of the annular concave shell 17, so that the konjac dietary fiber falling inside the cylindrical hollow casing 3 can be concentrated and discharged to the discharge pipe 4.

[0025] The adjustable cylindrical inner support 7 is installed inside the cylindrical hollow casing 3 and is used to fill any number of heating treatment zones among the multiple heating treatment zones. The adjustable cylindrical inner support 7 fills the multiple heating treatment zones in the order from the inside to the outside. The area filled by the adjustable cylindrical inner support 7 among the multiple heating treatment zones is the ineffective heating zone, and the remaining heating treatment zones are the effective heating zones. The konjac dietary fiber after low-temperature ultrafine pulverization is heated inside the effective heating zone. like Figures 5-7 As shown, the adjustable cylindrical inner support 7 includes multiple filling sections, which are used to fill multiple heat treatment zones. These filling sections can be inflatable air bladders or other filling mechanisms, such as... Figures 5-7 As shown, in some embodiments, the filling part includes an annular telescopic partition 19 and a vertical adjustment mechanism. The annular telescopic partition 19 is preferably a bellows-type telescopic partition, which has good telescopic performance and sealing performance. Multiple annular telescopic partitions 19 are arranged in sequence from the inside to the outside. An annular top plate 18 is fixedly connected to the upper end of each of the multiple annular telescopic partitions 19. The vertical adjustment mechanism and the annular top plate 18 are connected by transmission. By activating the vertical adjustment mechanism, the annular top plate 18 can be driven to move vertically. After the vertical adjustment mechanism drives the annular top plate 18 to rise, the annular telescopic partition 19 can be extended and unfolded to fill the space inside the cylindrical hollow casing 3. After the vertical adjustment mechanism drives the annular top plate 18 to fall, the annular telescopic partition 19 can be folded and retracted.

[0026] In some further embodiments, the outer edge of the inner annular top plate 18 can overlap the inner edge of the outer annular top plate 18, and the upper side of the annular top plate 18 is inclined downward in the order from the direction close to the axis of the cylindrical hollow housing 3 to the direction away from the axis of the cylindrical hollow housing 3, so that the konjac dietary fiber falling on the upper side of the annular top plate 18 can be guided to the annular concave shell 17 for discharge.

[0027] In some embodiments, an auxiliary housing 21 is fixedly connected to the lower side of the cylindrical hollow housing 3, and the lower end of the annular telescopic partition 19 is fixedly connected to the inner wall of the lower side of the auxiliary housing 21. The auxiliary housing 21 can be used to house the filling part inside the auxiliary housing 21, thereby reducing the impact of the filling part on the space of the effective heating zone.

[0028] Specifically, a vertical adjustment mechanism is disclosed herein. The vertical adjustment mechanism includes a second electric telescopic rod 22 fixedly connected to the lower inner wall of the auxiliary housing 21. The piston rod of the second electric telescopic rod 22 is fixedly connected to the annular top plate 18. By activating the second electric telescopic rod 22, the annular top plate 18 can be driven to move vertically, thereby adjusting the height of the annular top plate 18 and controlling the annular telescopic partition 19 to expand and contract.

[0029] like Figures 5-6 As shown, multiple guide rods 20 are fixedly connected to the lower inner wall of the auxiliary housing 21, and the annular top plate 18 is vertically slidably connected to the outside of the guide rods 20. The annular top plate 18 can be guided by the guide rods 20.

[0030] The atomizing nozzle 5 is fixedly connected to the upper end of the cylindrical hollow housing 3. The atomizing nozzle 5 is connected to the discharge port of the low-temperature ultrafine pulverizing mechanism 2. The atomizing nozzle 5 sprays out the konjac dietary fiber after low-temperature ultrafine pulverization in a mist. At the same time, a conveying pump can be fixedly connected between the atomizing nozzle 5 and the discharge port of the low-temperature ultrafine pulverizing mechanism 2. The conveying pump can be a screw conveying pump, which can pressurize the konjac dietary fiber inside the atomizing nozzle 5.

[0031] like Figure 5 , Figures 6-8 As shown, the atomizing nozzle 5 includes multiple spray outlets, each of which is corresponding to a multiple heating treatment zone, so that the konjac dietary fiber atomized from the multiple spray outlets enters the interior of its corresponding heating treatment zone, that is, the konjac dietary fiber is atomized and discharged into the interior of the effective heating zone.

[0032] The spray outlet section includes an open state and a closed state. When the spray outlet section is in the open state, konjac dietary fiber can be discharged into the effective heating zone. By controlling the opening and closing of multiple spray outlet sections, the spraying range of the atomizing nozzle 5 can be controlled.

[0033] Specifically, the atomizing nozzle 5 includes a feed pipe 24 fixedly connected to the upper side of the cylindrical hollow housing 3. The feed pipe 24 serves as the feed inlet and is connected to the discharge outlet of the low-temperature ultrafine pulverizing mechanism 2. The lower end of the feed pipe 24 is fixedly connected to the nozzle body 23. The lower side plate of the nozzle body 23 is a spray orifice plate 25. The spray orifice plate 25 has several atomizing spray holes. The nozzle body 23 is fixedly connected to a partition plate 26. The partition plate 26 divides the nozzle body 23 into multiple discharge chambers. The atomizing spray holes on the spray orifice plate 25 are divided into multiple groups. The multiple groups of atomizing spray holes are connected to multiple discharge chambers respectively. The multiple groups of atomizing spray holes serve as multiple spray discharge parts. One of the discharge chambers is directly connected to the feed pipe 24, while the other discharge chambers are connected to the feed pipe 24 via solenoid valves 27. The opening and closing of the spray discharge section can be controlled by controlling the opening of the solenoid valves 27.

[0034] Meanwhile, a conical top 8 that matches the atomizing nozzle 5 is fixedly connected to the upper side of the cylindrical hollow housing 3.

[0035] like Figures 1-5 and Figure 7 As shown, a hot air inlet pipe 28 is fixedly connected to the side wall of the cylindrical hollow housing 3. The hot air inlet pipe 28 is connected to a hot air input device, which can be a hot air blower. The hot air input device is used to input hot air into the interior of the cylindrical hollow housing 3, and the input hot air is preferably blown onto the inner wall of the cylindrical hollow housing 3.

[0036] The spiral air guide mechanism 6 is installed inside the cylindrical hollow casing 3 near the inner wall. The spiral air guide mechanism 6 includes multiple spiral segments connected sequentially from bottom to top. Each spiral segment spirals once. The distance between two adjacent spiral segments is the pitch. The pitch of the spiral air guide mechanism 6 is adjustable. By adjusting the pitch of the spiral air guide mechanism 6, the flow path of hot air inside the cylindrical hollow casing 3 can be adjusted, thereby changing the efficiency of the konjac dietary fiber falling inside the effective heating zone.

[0037] The spiral air guiding mechanism 6 includes a spiral air guiding blade 12. The lower end of the spiral air guiding blade 12 is fixedly connected to the inner wall of the lower side of the cylindrical hollow housing 3. An annular hollow upper housing 9 is fixedly connected to the upper side of the cylindrical hollow housing 3. A first electric telescopic rod 10 is fixedly connected to the upper side of the annular hollow upper housing 9. The piston rod of the first electric telescopic rod 10 is connected to the upper end of the spiral air guiding blade 12. By activating the first electric telescopic rod 10, the upper end of the spiral air guiding blade 12 can be driven to move vertically. By driving the upper end of the spiral air guiding mechanism 6 to move upward, the pitch of the spiral air guiding mechanism 6 can be expanded. By driving the upper end of the spiral air guiding mechanism 6 to move downward, the pitch of the spiral air guiding mechanism 6 can be reduced. The annular hollow upper housing 9 allows the spiral air guiding blade 12 to contract inside the annular hollow upper housing 9.

[0038] like Figures 2-3 and Figure 7 As shown, an annular partition 11 is vertically slidably connected inside the annular hollow upper shell 9. The upper end of the spiral guide vane 12 is fixedly connected to the annular partition 11. The output end of the first electric telescopic rod 10 is fixedly connected to the annular partition 11. By activating the first electric telescopic rod 10, the annular partition 11 is driven to move vertically, which in turn drives the upper end of the spiral guide vane 12 to move vertically. Furthermore, the setting of the first electric telescopic rod 10 can reduce the amount of hot air entering the annular hollow upper shell 9.

[0039] Meanwhile, a spiral mounting base 13 is fixedly connected to the edge of the spiral guide vane 12 near the inner wall of the cylindrical hollow housing 3. A sealing ring 14 is fixedly connected inside the spiral mounting base 13. The sealing ring 14 fills the gap between the spiral guide vane 12 and the inner wall of the cylindrical hollow housing 3, thereby improving the sealing performance between the spiral guide vane 12 and the inner wall of the cylindrical hollow housing 3.

[0040] The sealing ring 14 has a hollow air storage cavity inside. An air pump 15 is fixedly connected to the annular hollow upper shell 9. The air pump 15 is connected to the hollow air storage cavity of the sealing ring 14 through a hose 16. When the spiral guide vane 12 is in motion, the air pump 15 is activated to reduce the air pressure inside the hollow air storage cavity of the sealing ring 14, thereby reducing the friction between the sealing ring 14 and the inner wall of the cylindrical hollow shell 3. After the spiral guide vane 12 is in motion, the air pump 15 is activated to increase the air pressure inside the hollow air storage cavity of the sealing ring 14, causing the sealing ring 14 to expand, thereby increasing the friction between the sealing ring 14 and the inner wall of the cylindrical hollow shell 3.

[0041] A low-temperature ultrafine pulverization and spray drying integrated process for konjac dietary fiber includes the following steps: Step 1: Add konjac dietary fiber into the low-temperature ultra-fine grinding mechanism 2, and process the konjac dietary fiber into low-temperature ultra-fine powder through the low-temperature ultra-fine grinding mechanism 2. Step 2: The konjac dietary fiber after low-temperature ultrafine powder treatment is fed into the spray drying unit 1 for drying. Step 3: During the drying process, the effective heating zone range and the spraying range of the atomizing nozzle 5 are dynamically adjusted according to the feed rate of the spray drying unit 1. It should be noted that the feed amount of the spray drying unit 1 is divided into multiple levels according to the amount of konjac dietary fiber fed into the spray drying unit 1 by the low temperature ultra-fine pulverizing unit 2. Different levels of feed amount correspond to different effective heating zone ranges and different spraying ranges of the atomizing nozzles 5.

[0042] Here, the feed rate of the spray drying unit 1 can be detected based on the output rate of the low-temperature ultrafine pulverizing unit 2. For example, a quantitative discharge valve can be set at the discharge port of the low-temperature ultrafine pulverizing unit 2 to control the output rate of the low-temperature ultrafine pulverizing unit 2, thereby controlling the feed rate of the spray drying unit 1.

[0043] Here, the feed rate of the spray drying unit 1 can also be monitored in real time by a monitoring device, which can be an electromagnetic flow meter to monitor the feed rate in real time.

[0044] Step 4: During the drying process, the pitch of the spiral air guide mechanism 6 is dynamically adjusted according to the feed rate of the spray drying mechanism 1 to adjust the flow path of the hot air inside the cylindrical hollow casing 3.

[0045] Step 5: After the konjac dietary fiber is dried, open the valve on the discharge pipe 4 to discharge the konjac dietary fiber.

[0046] In summary, this technical solution dynamically adjusts the effective heating zone, the spraying range of the atomizing nozzle 5, and the pitch of the spiral air guide mechanism 6 based on the amount of konjac dietary fiber discharged from the low-temperature ultrafine pulverizing mechanism 2 to the spray drying mechanism 1. By adjusting the pitch of the spiral air guide mechanism 6, the flow path and velocity of the hot air can be effectively changed. When the feed rate increases, the hot air velocity is slowed down, extending the residence time of the konjac dietary fiber and ensuring sufficient drying. When the feed rate decreases, the hot air velocity is accelerated, reducing the phenomenon of over-drying of the konjac dietary fiber. Simultaneously, by dynamically adjusting the effective heating zone and the spraying range of the atomizing nozzle 5, the konjac dietary fiber entering the cylindrical hollow casing 3 for heating can approach the spiral air guide mechanism 6, effectively receiving the airflow adjustment from the spiral air guide mechanism 6. Furthermore, because the effective heating zone and the amount of konjac dietary fiber discharged from the low-temperature ultrafine pulverizing mechanism 2 to the spray drying mechanism 1 are dynamically matched, the hot air can be effectively concentrated to heat the konjac dietary fiber, reducing heat energy waste.

[0047] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A low-temperature ultrafine pulverization and spray drying integrated device for konjac dietary fiber, characterized in that: It includes a spray drying mechanism (1) and a low-temperature ultrafine pulverizing mechanism (2) fixedly connected to the upper side of the spray drying mechanism (1), wherein the discharge port of the low-temperature ultrafine pulverizing mechanism (2) and the feed port of the spray drying mechanism (1) are connected. The spray drying mechanism (1) includes a cylindrical hollow housing (3), on which a discharge pipe (4), an atomizing nozzle (5), a spiral air guide mechanism (6) and an adjustable cylindrical inner support (7) are installed. The cylindrical hollow casing (3) has multiple heating treatment zones inside, and the multiple heating treatment zones are arranged in order from the inside to the outside on the horizontal plane; The discharge pipe (4) is fixedly connected to the lower end of the cylindrical hollow casing (3), and the discharge pipe (4) is connected to the outermost heating treatment zone. A valve is installed on the discharge pipe (4). The adjustable cylindrical inner support (7) is installed inside the cylindrical hollow casing (3) and is used to fill any number of heating treatment zones. The area filled by the adjustable cylindrical inner support (7) among the multiple heating treatment zones is an invalid heating zone, and the remaining heating treatment zones are valid heating zones. The atomizing nozzle (5) is fixedly connected to the upper end of the cylindrical hollow housing (3), and the atomizing nozzle (5) is connected to the discharge port of the low temperature ultrafine pulverizing mechanism (2). The atomizing nozzle (5) includes multiple spray outlet sections, each of which is respectively opposite to a multiple heat treatment zone; The spray discharge section includes an open state and a closed state. When the spray discharge section is in the open state, it can discharge konjac dietary fiber into the effective heating zone. A hot air inlet pipe (28) is fixedly connected to the side wall of the cylindrical hollow casing (3). The spiral air guide mechanism (6) is installed inside the cylindrical hollow casing (3) near the inner wall. The spiral air guide mechanism (6) includes multiple spiral segments connected sequentially from bottom to top. Each spiral segment spirals once. The distance between two adjacent spiral segments is the pitch. The pitch of the spiral air guide mechanism (6) is adjustable.

2. The integrated low-temperature ultrafine pulverization and spray drying device for konjac dietary fiber according to claim 1, characterized in that: The adjustable columnar inner support (7) includes multiple filling parts, which are used to fill multiple heat treatment zones respectively. Each filling part includes an annular telescopic partition (19) and a vertical adjustment mechanism. The multiple annular telescopic partitions (19) are arranged sequentially from the inside to the outside. The upper end of each of the multiple annular telescopic partitions (19) is fixedly connected to an annular top plate (18). The vertical adjustment mechanism and the annular top plate (18) are connected by a transmission.

3. The integrated low-temperature ultrafine pulverization and spray drying device for konjac dietary fiber according to claim 2, characterized in that: The outer edge of the inner annular top plate (18) can overlap the inner edge of the outer annular top plate (18), and the upper side of the annular top plate (18) is inclined downward in the order from the direction close to the axis of the cylindrical hollow housing (3) to the direction away from the axis of the cylindrical hollow housing (3).

4. The integrated low-temperature ultrafine pulverization and spray drying device for konjac dietary fiber according to claim 3, characterized in that: An additional shell (21) is fixedly connected to the lower side of the cylindrical hollow housing (3), and the lower end of the annular telescopic partition (19) is fixedly connected to the inner wall of the lower side of the additional shell (21).

5. The integrated low-temperature ultrafine pulverization and spray drying device for konjac dietary fiber according to claim 4, characterized in that: The vertical adjustment mechanism includes a second electric telescopic rod (22) fixedly connected to the inner wall of the lower side of the auxiliary housing (21). The piston rod of the second electric telescopic rod (22) and the annular top plate (18) are fixedly connected. Multiple guide rods (20) are fixedly connected to the inner wall of the lower side of the auxiliary housing (21). The annular top plate (18) is vertically slidably connected to the outside of the guide rods (20). The annular telescopic partition (19) is an accordion-type telescopic partition.

6. The integrated low-temperature ultrafine pulverization and spray drying device for konjac dietary fiber according to claim 1, characterized in that: The atomizing nozzle (5) includes a feed pipe (24) fixedly connected to the upper side of the cylindrical hollow housing (3). The feed pipe (24) serves as the feed inlet and is connected to the discharge outlet of the low-temperature ultrafine pulverizing mechanism (2). The lower end of the feed pipe (24) is fixedly connected to the nozzle body (23). The lower side plate of the nozzle body (23) is a spray orifice plate (25). The spray orifice plate (25) has several atomizing spray holes. The nozzle body (23) is fixedly connected to a partition plate (26). The partition plate (26) divides the nozzle body (23) into multiple discharge chambers. The atomizing spray holes on the spray orifice plate (25) are divided into multiple groups. The multiple groups of atomizing spray holes are connected to multiple discharge chambers respectively. The multiple groups of atomizing spray holes serve as multiple spray discharge parts. One of the discharge chambers is directly connected to the feed pipe (24), and the other discharge chambers are connected to the feed pipe (24) through a solenoid valve (27).

7. The integrated low-temperature ultrafine pulverization and spray drying device for konjac dietary fiber according to claim 1, characterized in that: The spiral air guide mechanism (6) includes a spiral air guide plate (12). The lower end of the spiral air guide plate (12) is fixedly connected to the inner wall of the lower side of the cylindrical hollow housing (3). An annular hollow upper housing (9) is fixedly connected to the upper side of the cylindrical hollow housing (3). A first electric telescopic rod (10) is fixedly connected to the upper side of the annular hollow upper housing (9). The piston rod of the first electric telescopic rod (10) is connected to the upper end of the spiral air guide plate (12) in a transmission connection. The annular hollow upper shell (9) is vertically slidably connected to an annular partition (11), the upper end of the spiral guide vane (12) is fixedly connected to the annular partition (11), and the output end of the first electric telescopic rod (10) is fixedly connected to the annular partition (11).

8. The integrated low-temperature ultrafine pulverization and spray drying device for konjac dietary fiber according to claim 7, characterized in that: The spiral guide vane (12) is fixedly connected to a spiral mounting base (13) near the edge of the inner wall of the cylindrical hollow casing (3), and a sealing ring (14) is fixedly connected inside the spiral mounting base (13). The sealing ring (14) has a hollow air storage cavity inside, and an air pump (15) is fixedly connected to the annular hollow upper shell (9). The air pump (15) is connected to the hollow air storage cavity of the sealing ring (14) through a hose (16).

9. A low-temperature ultrafine pulverization and spray drying integrated process for konjac dietary fiber, characterized by the following features as described in claims 1-8: Includes the following steps: Step 1: Add konjac dietary fiber into the low-temperature ultra-fine grinding mechanism (2) and process the konjac dietary fiber into low-temperature ultra-fine powder through the low-temperature ultra-fine grinding mechanism (2); Step 2: The konjac dietary fiber after low-temperature ultrafine powder treatment is fed into the spray drying unit (1) for drying. Step 3: During the drying process, the effective heating zone range and the spraying range of the atomizing nozzle (5) are dynamically adjusted according to the feed rate of the spray drying mechanism (1). Step 4: During the drying process, the pitch of the spiral air guide mechanism (6) is dynamically adjusted according to the feed rate of the spray drying mechanism (1) to adjust the flow path of the hot air inside the cylindrical hollow casing (3). Step 5: After the konjac dietary fiber is dried, open the valve on the discharge pipe (4) to discharge the konjac dietary fiber.

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