Integrated air supply system for segmented drying of vitamin D3 granulation fluidized bed

Abstract

The invention discloses a segmented drying integrated air supply system for a vitamin D3 granulation fluidized bed, and relates to the technical field of drying, the segmented drying integrated air supply system comprises an air heater, a feeding treatment assembly, a feeding bin, a double-screening assembly and a classified drying treatment assembly, the feeding treatment assembly is arranged at the top of the feeding bin, and the double-screening assembly is arranged at the bottom of the feeding bin; under the cooperation of the classified drying treatment assembly, the double-screening assembly and the feeding treatment assembly, a complete and cooperative working process is formed, classified drying is achieved, all the assemblies work cooperatively, classified drying and screening are conducted according to the particle size and the water content of particles, the drying process can be controlled more accurately, energy consumption and energy conservation are considered, and the product quality is uniform; vitamin D3 particles are uniformly dried, the particle size is consistent, the purity and the stability of the product are high, working parameters can be automatically adjusted according to the initial states of particles in different batches, the equipment is suitable for various production conditions, and the universality and the flexibility of the equipment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of drying, and in particular to an integrated air supply system for vitamin D3 granulation fluidized bed segmented drying. Background Art

[0002] As people pay more attention to health, the demand for vitamin D3 in food, medicine and other fields continues to grow. Granulation and drying are key links in the production process of vitamin D3. Traditional drying technology is difficult to meet the requirements of modern large-scale and high-quality production. Fluidized bed drying technology has been widely used in the production of vitamin D3 due to its advantages such as high heat and mass transfer efficiency, fast drying speed and uniform particle mixing. However, with the expansion of production scale and the improvement of product quality requirements, traditional fluidized bed drying technology has gradually exposed some problems, prompting the research and development of segmented drying integrated air supply system.

[0003] At present, there are still some problems in the process of vitamin D3 granulation fluidized bed segmented drying integrated air supply operation. For example, it is difficult to achieve precise zoning control of temperature and air volume in traditional fluidized bed drying, resulting in uneven heating of vitamin D3 particles during the drying process. Some particles may be over-dried, resulting in loss of nutrients, affecting product quality, while some particles are insufficiently dried and have too high a water content, which can easily lead to product deterioration during storage. In addition, different batches of vitamin D3 particles may differ in initial water content, particle size distribution, etc. It is difficult for traditional drying systems to be flexibly adjusted according to these differences. Therefore, it is necessary to propose a vitamin D3 granulation fluidized bed segmented drying integrated air supply system. Summary of the invention

[0004] The purpose of the present invention is to provide a vitamin D3 granulation fluidized bed segmented drying integrated air supply system to solve the problem that the traditional fluidized bed drying mentioned in the above background technology is difficult to achieve precise zoning control of temperature and air volume, resulting in uneven heating of the vitamin D3 particles during the drying process. Some particles may be over-dried and nutrients may be lost, affecting product quality, while some particles are insufficiently dried and have too high a water content, which may easily cause the product to deteriorate during storage. In addition, different batches of vitamin D3 particles may differ in initial water content, particle size distribution, etc., and it is difficult for traditional drying systems to be flexibly adjusted according to these differences.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a vitamin D3 granulation fluidized bed segmented drying integrated air supply system, comprising a feed processing component, a feed bin, a double screening component and a classification drying processing component, wherein the feed processing component is arranged at the top of the feed bin, the bottom of the feed bin is connected to an air flow separation chamber, the double screening component is arranged at the bottom end of the air flow separation chamber, and the classification drying processing component is arranged in two groups and arranged inside the top end of the air flow separation chamber; The classification and drying processing component includes a screening flow tube, an intercepting net is installed inside the screening flow tube, an electric valve is installed at the bottom of the intercepting net, the bottom of the screening flow tube is connected to a flow tube, holes are opened on the bottom edge surface of the flow tube, and discharge holes are opened on the side end surface of the flow tube. The discharge holes are used to discharge particles guided by the electric valve, and the holes are used to discharge particles guided by the flow tube. The mesh diameters of the two groups of intercepting nets are different. An air inlet end is installed on the top of the screening flow tube, and the side end of the air inlet end is connected to a controlled air guide valve pipe.

[0006] Preferably, the classification and drying processing component also includes an installation bin, a filtering and sterilizing moisture treatment chamber is installed inside the installation bin, a guide valve end is opened on the bottom surface of the filtering and sterilizing moisture treatment chamber, a stator and rotor structure is installed on the side end of the filtering and sterilizing moisture treatment chamber, a ring worm gear is installed outside the filtering and sterilizing moisture treatment chamber, and a servo frequency conversion motor is installed on the frame of the filtering and sterilizing moisture treatment chamber.

[0007] Preferably, a worm is installed at the bottom of the servo frequency conversion motor, and the worm is meshingly connected to the ring worm gear. The bottom of the worm is connected to a gear. The bottom of the air inlet end is internally rotatably connected to an inner ring gear, and the inner ring gear is meshingly connected to the gear. The inner ring gear is used to drive the barrier net to rotate in the screening flow tube.

[0008] Preferably, the side end of the quantity-controlled air guide valve pipe is connected to an appropriate distributor, the side end of the appropriate distributor is connected to an air guide pipe, the bottom of the air guide pipe is connected to a dry air distributor, the side end of the dry air distributor is connected to a dry air guide pipe, the side end of the dry air guide pipe is provided with an air outlet, the inside of the air outlet is provided with a blocking net to prevent particles from flowing back into the dry air guide pipe, the side end of the dry air guide pipe is provided with an air guide fan, the side end of the air guide fan is arranged with a hot air heater, the side end of the hot air heater is externally connected to an energy-saving heat exchange device, and the heat-conducting end of the energy-saving heat exchange device is arranged inside the dry air guide pipe and the air guide pipe.

[0009] Preferably, a secondary guide chamber is installed at the bottom of the airflow separation chamber, the secondary guide chamber is connected to the flow cylinder, the interior of the airflow separation chamber is connected to the discharge hole, the side end of the secondary guide chamber is connected to the high-efficiency sterilization moisture treatment chamber, the side end of the airflow separation chamber is connected to the classification discharge chamber, the bottom of the secondary guide chamber is connected to the classification discharge chamber through a conveying pipeline, the bottom of the classification discharge chamber is connected to a drying guide pipe, the side end of the drying guide pipe is connected to a fluidized drying bed, an electric discharge valve is installed inside the side end of the fluidized drying bed, and the electric discharge valve is installed on the right side of the screen.

[0010] Preferably, the double screening component includes a mounting plate, a bidirectional frequency conversion control motor is mounted on the surface of the mounting plate, the left and right output ends of the bidirectional frequency conversion control motor are connected to angle rotating parts, the top end of the angle rotating part is connected to a connecting guide rod, the side end of the connecting guide rod is connected to a swivel part, the top end of the swivel part is internally connected to a pulling link, there is a height difference between the pulling links, and the side ends of the pulling links are respectively connected to the first screen end and the second screen end.

[0011] Preferably, the mesh diameter of the first screen end is larger than that of the second screen end, a first negative pressure pneumatic adsorption duct is installed on the top surface of the first screen end, and a second negative pressure pneumatic adsorption duct is installed on the side end of the second screen end, the side end of the first negative pressure pneumatic adsorption duct is connected to a group of stator and rotor structures, and the second negative pressure pneumatic adsorption duct is connected to another group of stator and rotor structures.

[0012] Preferably, the feed processing assembly comprises a driving structure, and the output end of the driving structure is connected to a drying rake via a pulley structure.

[0013] Preferably, a drying fluidizing cylinder is arranged outside the drying rakes, and a conical discharge valve end is connected to the bottom of the drying fluidizing cylinder, and the conical discharge valve end is connected to a feed bin.

[0014] Preferably, microwave moisture sensors are installed on the surfaces of the flow cylinder, the electric discharge valve and the electric valve, and a probe rod is installed inside the feed bin, and near-infrared moisture sensors and laser particle size measurement sensors are installed inside the probe rods respectively. The probe rods are arranged in multiple groups, which are respectively located at the air outlet spaces at the side ends of the feed bin and the drying air guide pipe, as well as inside the filtering and sterilizing moisture treatment chamber, inside the airflow separation chamber, and inside the fluidized drying bed. They are used for setting high-frequency detection in the early stage of drying when the moisture content of the particles changes rapidly, so as to capture the rapid changes in moisture content in time, and reduce the detection frequency as the drying progresses.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, a complete and coordinated process is formed by the cooperation of the classification drying processing component, the double screening component and the feed processing component, so that the driving structure of the feed processing component drives the drying rakes to rotate, break up the agglomerated materials, make them looser, and facilitate subsequent drying. The processed materials enter the feed bin, and the air flow separation chamber uses the airflow to preliminarily separate the fine powder and larger particles in the materials. The fine powder is collected by the powder collector, and the larger particles sink to the double screening component. The double screening component drives the angle rotating parts and other components through the bidirectional frequency conversion control motor, so that the first screen end and the second screen end reciprocate up and down. Combined with different mesh diameters and negative pressure pneumatic adsorption ducts, the particles are screened and graded, and particles of different particle size ranges are separated to ensure the uniformity of the particle size entering the subsequent drying link; 2. In the present invention, the apertures of the blocking nets in the two-component sieve flow tubes of the classification drying treatment component are different under the cooperation of the classification drying treatment component, the double screening component and the feed processing component, and the particles of different particle sizes are initially intercepted and graded. The servo frequency conversion motor drives the blocking net to rotate, so as to achieve uniform distribution of particles and better screening effect. The hot air enters the sieve flow tube through the drying air distributor, the air guide pipe, the appropriate distributor and the control air guide valve pipe. At the same time, the hot air is filtered, sterilized and regulated in the filtration and sterilization moisture treatment chamber, and fully contacts with the particles to achieve drying. The flow tube discharges different types of particles through the bottom holes and the side end discharge holes to achieve classification drying, so that each component works together to perform classification drying and screening according to the particle size and water content, which can more accurately control the drying process, improve the uniformity of product quality, ensure that the vitamin D3 particles are dried evenly and have consistent particle size, reduce the situation of over-drying or under-drying, improve the purity and stability of the product, and can automatically adjust the working parameters according to the initial state of different batches of particles, so that the equipment is suitable for a variety of production conditions, and improve the versatility and flexibility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a vitamin D3 granulation fluidized bed segmented drying integrated air supply system of the present invention; Figure 2 It is a schematic structural diagram of a side view of a vitamin D3 granulation fluidized bed segmented drying integrated air supply system of the present invention; Figure 3 It is a schematic diagram of the internal cross-sectional structure of the main body in a vitamin D3 granulation fluidized bed segmented drying integrated air supply system of the present invention; Figure 4 It is a structural schematic diagram of a double screening component in a vitamin D3 granulation fluidized bed segmented drying integrated air supply system of the present invention; Figure 5 It is a structural schematic diagram of a feed processing component in a vitamin D3 granulation fluidized bed segmented drying integrated air supply system of the present invention; Figure 6 It is a structural schematic diagram of a classification drying processing component in a vitamin D3 granulation fluidized bed segmented drying integrated air supply system of the present invention; Figure 7 It is a schematic diagram of the separation structure of the classification drying processing components in the integrated air supply system for segmented drying of a vitamin D3 granulation fluidized bed according to the present invention; Figure 8 It is a partial structural schematic diagram of a classification drying processing component in a vitamin D3 granulation fluidized bed segmented drying integrated air supply system of the present invention; Fig. 9 The present invention is a vitamin D3 granulation fluidized bed segmented drying integrated air supply system Figure 8 A is an enlarged structural diagram of FIG.

[0017] In the figure: 1. air guide fan; 2. hot air device; 3. drying air distributor; 4. air guide pipe; 5. appropriate distributor; 6. air guide valve pipe for controlling quantity; 7. feeding processing assembly; 71. driving structure; 72. drying rake; 73. drying fluidizing cylinder; 74. conical discharge valve end; 8. feeding bin; 9. air flow separation chamber; 10. secondary guide chamber; 11. high-efficiency sterilization water treatment chamber; 12. drying guide pipe; 13. classification discharge chamber; 14. classification drying processing assembly; 140. installation chamber; 141. filtration and sterilization water treatment chamber; 142. servo frequency conversion motor; 143. ring Worm gear; 144, screening flow tube; 145, flow direction tube; 146, barrier net; 147, guide valve end; 148, gear inside the ring; 149, gear; 1410, worm; 15, dry air guide pipe; 16, air outlet; 17, electric exhaust valve; 18, double screening component; 180, two-way frequency conversion control motor; 181, angle rotating part; 182, swivel part; 183, connecting guide rod; 184, pulling connecting rod; 185, first screen end; 186, second screen end; 187, first negative pressure pneumatic adsorption duct; 188, second negative pressure pneumatic adsorption duct. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1: Reference Figure 1 - Fig. 9 As shown: a vitamin D3 granulation fluidized bed segmented drying integrated air supply system, including a feed processing component 7, a feed bin 8, a double screening component 18 and a classification drying processing component 14, the feed processing component 7 is installed on the top of the feed bin 8, the bottom of the feed bin 8 is connected to the air flow separation chamber 9, the double screening component 18 is installed at the bottom of the air flow separation chamber 9, and the classification drying processing component 14 is set in two groups and installed inside the top of the air flow separation chamber 9; The classification and drying treatment component 14 includes a screening flow tube 144, an intercepting net 146 is installed inside the screening flow tube 144, an electric valve is installed at the bottom of the intercepting net 146, the bottom of the screening flow tube 144 is connected to the flow tube 145, the bottom surface of the flow tube 145 is provided with holes, the side surface of the flow tube 145 is provided with discharge holes, the discharge holes are used to discharge particles guided by the electric valve, and the holes are used to discharge particles guided by the flow tube 145, the two groups of intercepting nets 146 have different mesh diameters, an air inlet end is installed on the top of the screening flow tube 144, and the side end of the air inlet end is connected to the control air guide valve pipe 6.

[0020] The classification and drying processing component 14 also includes an installation bin 140, in which a filtering and sterilizing moisture treatment chamber 141 is installed, a guide valve end 147 is provided on the bottom surface of the filtering and sterilizing moisture treatment chamber 141, a stator and rotor structure is installed on the side end of the filtering and sterilizing moisture treatment chamber 141, a ring worm gear 143 is installed on the outside of the filtering and sterilizing moisture treatment chamber 141, and a servo frequency conversion motor 142 is installed on the frame of the filtering and sterilizing moisture treatment chamber 141.

[0021] A worm 1410 is installed at the bottom of the servo variable frequency motor 142, and the worm 1410 is meshed with the ring worm wheel 143. The bottom of the worm 1410 is connected to a gear 149. The bottom of the air inlet end is internally rotatably connected with an inner ring gear 148. The inner ring gear 148 and the gear 149 are meshed. The inner ring gear 148 is used to drive the barrier net 146 to rotate in the screening flow tube 144.

[0022] In this embodiment, first, when the screened particles enter the classification and drying processing component 14, the air inlet end at the top of the screening flow tube 144 of the two groups of classification and drying processing components 14 introduces the processed hot air through the control air guide valve pipe 6. The hot air is generated by the air guide fan 1 and the hot air generator 2, and first passes through the dry air distributor 3 and the dry air guide pipe 16. The blocking net at the side end of the air outlet of the dry air guide pipe 16 prevents the particles from flowing back.

[0023] At the same time, the hot air enters the filtering and sterilizing moisture treatment chamber 141, which filters, sterilizes and adjusts the moisture of the hot air to ensure that the hot air entering the drying area is clean and has appropriate humidity. The treated hot air enters the screening flow tube 144 through the guide valve end 147, fully contacts with the particles to achieve drying. During the drying process, the microwave moisture sensor on the flow tube 145, the electric discharge valve 17 and the surface of the electric valve, as well as the feed silo 8, the side outlet space of the drying air guide pipe 16 and the probe rod inside the filtering and sterilizing moisture treatment chamber 141 continuously monitor the moisture content and particle size changes of the particles. As the drying progresses, the detection frequency decreases.

[0024] In the screening flow tube 144, the blocking nets 146 play the role of preliminary interception and classification of particles. The two groups of blocking nets 146 have different mesh sizes and can classify particles of different sizes. When the servo frequency conversion motor 142 is started, it drives the worm 1410 to rotate, and the worm 1410 engages with the ring worm gear 143, thereby driving the gear 149 to rotate, and the gear 149 engages with the inner ring gear 148, so that the inner ring gear 148 drives the blocking nets 146 to rotate in the screening flow tube 144, thereby achieving uniform distribution of particles and better screening effect.

[0025] The particles pass through the blocking net 146 and then enter the flow tube 145 according to their particle size and weight, while the particles that cannot pass through directly enter the discharge holes at the side end along the inside of the blocking net 146, so that the holes at the bottom of the flow tube 145 and the discharge holes at the side end discharge different types of particles respectively, wherein the electric valve controls the particles falling from the blocking net 146 to be discharged through the discharge holes, while other particles in the flow tube 145 are discharged from the holes.

[0026] By combining the classification and drying processing component 14 and the dual screening component 18 as a whole, classification, drying and screening are performed according to the particle size and water content, which can more accurately control the drying process and improve the uniformity of product quality. It ensures that the vitamin D3 particles are dried evenly and have a consistent particle size, reduces over- or under-drying, improves the purity and stability of the product, and can automatically adjust the working parameters according to the initial state of different batches of particles, making the equipment suitable for a variety of production conditions, thereby improving the versatility and flexibility of the equipment.

[0027] Embodiment 2: According to Figure 1 - Figure 3 As shown, the side end of the controlled air guide valve pipe 6 is connected with an appropriate distributor 5, the side end of the appropriate distributor 5 is connected with an air guide pipe 4, the bottom of the air guide pipe 4 is connected with a dry air distributor 3, the side end of the dry air distributor 3 is connected with a dry air guide pipe 15, the side end of the dry air guide pipe 15 is provided with an air outlet 16, the inside of the air outlet 16 is provided with a blocking net for preventing particles from flowing back into the dry air guide pipe 15, the side end of the dry air guide pipe 15 is provided with an air guide fan 1, the side end of the air guide fan 1 and the air heater 2 are arranged, the side end of the air heater 2 is externally connected with an energy-saving heat exchange device, and the heat-conducting end of the energy-saving heat exchange device is arranged inside the dry air guide pipe 15 and the air guide pipe 4.

[0028] A secondary guide chamber 10 is installed at the bottom of the airflow separation chamber 9, the secondary guide chamber 10 is connected to the flow tube 145, the interior of the airflow separation chamber 9 is connected to the discharge hole, the side end of the secondary guide chamber 10 is connected to the high-efficiency sterilization moisture treatment chamber 11, the side end of the airflow separation chamber 9 is connected to the classification discharge chamber 13, the bottom of the secondary guide chamber 10 is connected to the classification discharge chamber 13 through a conveying pipeline, the bottom of the classification discharge chamber 13 is connected to a drying guide pipe 12, the side end of the drying guide pipe 12 is connected to a fluidized drying bed, an electric discharge valve 17 is installed inside the side end of the fluidized drying bed, and the electric discharge valve 17 is installed on the right side of the screen.

[0029] In this embodiment, after the overall device is started, the hot air generator 2 starts to work and generates high-temperature hot air. The air guide fan 1 transports the hot air out through the drying air duct 15. In this process, the hot air first passes through the drying air distributor 3. The drying air distributor 3 evenly distributes the hot air to each branch of the drying air duct 15 to ensure that the hot air can evenly enter the subsequent drying links. Then, the hot air passes through the air duct 4 and reaches the appropriate distributor 5. The appropriate distributor 5 accurately adjusts the flow rate of the hot air according to the parameters set by the system and the drying requirements monitored in real time. After that, the hot air enters the air inlet end at the top of the sieving flow tube 144 of the classification drying processing component 14 through the control air guide valve pipe 6, and the blocking net at the air outlet 16 can effectively prevent particles from being carried into the drying air duct 15 by the air flow during the drying process, thereby ensuring the normal operation of the hot air supply system.

[0030] In addition, the energy-saving heat exchange device can automatically adjust the intensity of heat exchange according to the difference between the external ambient temperature and the overall internal hot air temperature. In cold weather, when the outside air temperature is low, the heat exchange efficiency is enhanced and more hot air heat is recovered to preheat the cold air. In hot weather, the heat exchange efficiency is appropriately reduced to avoid excessive heat recovery that causes the hot air temperature to be too low and affect the operating results.

[0031] Vitamin D3 particles enter the feed bin 8 from the feed processing component 7, and the material enters the air flow separation chamber 9 from the feed bin 8. The air flow separation chamber 9 uses the air flow to preliminarily separate the fine powder and larger particles in the material. The fine powder rises with the air flow, and the larger particles sink. The fine powder is collected by the powder collector installed on the top of the air flow separation chamber 9, and the sunken particles reach the double screening component 18, so that the final smallest particles fall onto the intercepting net from the second screen end 186. Then, the smallest particles are discharged from the electric discharge valve 17 to the fluidized drying bed by the inclined air flow of the drying air guide pipe 15, so that the particles in the fluidized drying bed are in a fluidized state under the action of the hot air flow, and are further dried to a qualified moisture content. The electric discharge valve 17 controls the speed at which the particles are discharged from the fluidized drying bed. When it is detected that the drying of the particles in the fluidized drying bed is completed, the electric discharge valve 17 opens to discharge the dried product through the drying guide pipe 12 to the classification discharge chamber 13.

[0032] The screened particles enter the flow cylinder 145, and the flow cylinder 145 discharges different types of particles through the holes on the bottom and the discharge holes on the side according to the characteristics of the particles. The particles discharged from the discharge holes enter the airflow separation chamber 9 and are output to the classification discharge chamber 13, and the particles discharged from the holes enter the secondary guide chamber 10. In the secondary guide chamber 10, the particles may first be processed by the high-efficiency sterilization moisture treatment chamber 11 to remove possible bacteria and excess moisture and improve the quality of the product. After that, the particles enter the classification discharge chamber 13 through the conveying pipeline, so that after the whole is processed, under the action of the classification discharge chamber 13, different particles are classified and discharged.

[0033] During the drying process, sensors installed at different locations (such as microwave moisture sensors, sensors on the probe, etc.) will monitor the moisture content of the particles and related parameters of the drying environment in real time. If it is detected that the moisture content of the particles is high and more hot air is needed to accelerate drying, the external PLC controller will automatically increase the power of the air guide fan 1 and increase the supply of hot air. At the same time, the appropriate distributor 5 and the control air guide valve pipe 6 will also adjust the opening accordingly to ensure that the hot air can be accurately distributed to the required area. On the contrary, when the moisture content of the particles decreases and approaches the drying target, the external PLC controller will reduce the power of the air guide fan 1, reduce the hot air supply, and avoid over-drying.

[0034] The hot air heater 2 is adjusted according to the temperature data fed back by the sensor. When it is detected that the temperature in the drying area is low and is not conducive to the drying of the particles, the hot air heater 2 increases the heating power and raises the hot air temperature. If the temperature is too high, it may affect the product quality, so the heating power is reduced to keep the hot air temperature within an appropriate range.

[0035] At the same time, according to the particle size and quantity screened by the dual screening component 18, and the distribution of particles in the airflow separation chamber 9, the external PLC controller can adjust the opening of related valves (such as the electric valve flowing to the cylinder 145, etc.) to control the conveying speed and path of the particles. For example, if it is found that a certain type of particles is accumulated too much in a certain area, the opening of the corresponding valve can be appropriately increased to speed up the conveying of the particles and ensure the smooth progress of the entire drying process.

[0036] Embodiment 3: According to Figure 1 - Figure 5As shown, the double screening component 18 includes a mounting plate, on the surface of which a bidirectional frequency conversion control motor 180 is mounted, the left and right output ends of the bidirectional frequency conversion control motor 180 are connected to an angle rotating member 181, the top of the angle rotating member 181 is connected to a connecting guide rod 183, the side end of the connecting guide rod 183 is connected to a swivel member 182, the top of the swivel member 182 is internally connected to a pulling link 184, there is a height difference between the pulling links 184, and the side ends of the pulling links 184 are respectively connected to a first screen end 185 and a second screen end 186.

[0037] The mesh diameter of the first screen end 185 is larger than that of the second screen end 186. A first negative pressure pneumatic adsorption duct 187 is installed on the top surface of the first screen end 185, and a second negative pressure pneumatic adsorption duct 188 is installed on the side end of the second screen end 186. The side end of the first negative pressure pneumatic adsorption duct 187 is connected to a group of stator and rotor structures, and the second negative pressure pneumatic adsorption duct 188 is connected to another group of stator and rotor structures.

[0038] The feed processing assembly 7 comprises a driving structure 71, and an output end of the driving structure 71 is connected to a drying rake 72 via a pulley structure.

[0039] A drying fluidizing cylinder 73 is arranged outside the drying rake blade 72 . The bottom of the drying fluidizing cylinder 73 is connected to a conical discharge valve end 74 . The conical discharge valve end 74 is connected to the feed bin 8 .

[0040] Microwave moisture sensors are installed on the surface of the flow tube 145, the electric discharge valve 17 and the electric valve, and a probe rod is installed inside the feed bin 8. A near-infrared moisture sensor and a laser particle size measurement sensor are installed inside the probe rod. The probe rod is arranged in multiple groups, which are respectively located at the air outlet space at the side end of the feed bin 8 and the drying air guide pipe 15, as well as inside the filtering and sterilizing moisture treatment chamber 141, inside the air flow separation chamber 9, and inside the fluidized drying bed. It is used in the early stage of drying when the moisture content of the particles changes rapidly. Setting a high-frequency detection can capture the rapid changes in moisture content in time, and reduce the detection frequency as the drying progresses.

[0041] In this embodiment, when the overall device receives the production instruction, the feed processing component 7 starts to work, the driving structure 71 is started, and the drying rake 72 is driven to rotate through the pulley structure. The drying rake 72 rotates in the drying fluidized cylinder 73 to perform preliminary processing on the vitamin D3 material entering therein, such as breaking up the agglomerated material to make it looser, which is conducive to subsequent drying. The processed material enters the feed bin 8 through the conical discharge valve end 74. During this process, the probe rod in the feed bin 8 (equipped with a near-infrared moisture sensor and a laser particle size measurement sensor) starts to work. Since it is the initial stage of drying, the moisture content of the particles changes rapidly. The material is detected at a set high frequency to capture the rapid changes in moisture content and particle size in time. These data provide an initial reference for subsequent drying operations.

[0042] Then, when the material enters the air flow separation chamber 9 from the feed bin 8, the air flow separation chamber 9 uses the air flow to preliminarily separate the fine powder and larger particles in the material. The fine powder rises with the air flow, and the larger particles sink. The sinking particles reach the double screening component 18, and the bidirectional frequency conversion control motor 180 of the double screening component 18 is started to drive the angle rotating parts 181 on the left and right sides to rotate. The angle rotating parts 181 are connected by the guide rod 183 and the swivel part 182, so that the dragging connecting rod 184 drives the first screen end 185 and the second screen end 186 to do up and down reciprocating motion. The mesh diameter of the first screen end 185 is larger than that of the second screen end 186. The particles are screened and graded on the screen. The first negative pressure pneumatic adsorption duct 187 and the second negative pressure pneumatic adsorption duct 188 respectively adsorb and collect specific particles on the first screen end 185 and the second screen end 186, and separate the particles in different particle size ranges, so as to further ensure the uniformity of the particle size entering the subsequent drying link.

[0043] The wiring diagrams of the microwave moisture sensor, near-infrared moisture sensor and laser particle size measurement sensor in the present invention are common knowledge in the art, and their working principles are already known technologies. The models are selected according to actual use, so the control methods and wiring arrangements of the microwave moisture sensor, near-infrared moisture sensor and laser particle size measurement sensor are no longer explained in detail.

[0044] The usage and working principle of this device: First, after the entire device is started and receives the production instruction, the driving structure 71 of the feed processing component 7 starts to work. The driving structure 71 drives the drying rakes 72 to rotate in the drying fluidized cylinder 73 through the pulley structure, and performs preliminary processing on the incoming vitamin D3 material, breaking up the agglomerated material to make it looser and convenient for subsequent drying. The processed material enters the feed bin 8 through the conical discharge valve end 74. At this time, the probe rod equipped with a near-infrared moisture sensor and a laser particle size measurement sensor in the feed bin 8 starts to work. Since the moisture content of the particles changes rapidly in the initial stage of drying, the probe rod detects the moisture content and particle size of the material at a set high frequency to provide initial data reference for subsequent drying operations.

[0045] Then the material enters the air flow separation chamber 9 from the feed bin 8, and the air flow separation chamber 9 preliminarily separates the fine powder and larger particles in the material. The fine powder rises with the air flow, and the larger particles sink, and the fine powder is collected by the powder collector installed on the top of the air flow separation chamber 9. The sunken particles reach the double screening component 18, and the two-way frequency conversion control motor 180 of the double screening component 18 is started, driving the angle rotating member 181 to rotate, and through the connecting guide rod 183 and the rotating ring member 182, the dragging connecting rod 184 drives the first screen end 185 and the second screen end 186 to do up and down reciprocating motion. Because the mesh diameter of the first screen end 185 is larger than that of the second screen end 186, the particles are screened and graded on the screen. At the same time, the first negative pressure pneumatic adsorption duct 187 and the second negative pressure pneumatic adsorption duct 188 respectively adsorb and collect specific particles on different screens, so as to further ensure the uniformity of the particle size entering the subsequent drying link.

[0046] At the same time, the hot air heater 2 generates high-temperature hot air, and the air guide fan 1 transports the hot air through the drying air guide pipe 15. The hot air first passes through the drying air distributor 3 and is evenly distributed to the branches of each drying air guide pipe 15, and then reaches the appropriate distributor 5 through the air guide pipe 4. The appropriate distributor 5 accurately adjusts the hot air flow rate according to the system setting parameters and real-time drying requirements, and then enters the top air inlet end of the sieving flow tube 144 of the classification drying processing component 14 through the control air guide valve pipe 6. The barrier at the air outlet at the side end of the drying air guide pipe 15 prevents the particles from flowing back into the pipeline to ensure the normal operation of the hot air supply system. During the drying process, if the sensor detects that the moisture content of the particles is high, the external PLC controller increases the power of the air guide fan 1 and increases the hot air supply. At the same time, the opening of the appropriate distributor 5 and the control air guide valve pipe 6 is adjusted to ensure accurate distribution of the hot air. When the moisture content of the particles decreases and approaches the drying target, the power of the air guide fan 1 is reduced to reduce the hot air supply. In addition, the hot air heater 2 adjusts the heating power according to the temperature data fed back by the sensor to make the hot air temperature appropriate.

[0047] The screened particles enter the screening flow tube 144 of the classification and drying treatment component 14. The blocking nets 146 of the two groups of screening flow tubes 144 have different mesh sizes, and preliminary interception and classification of particles of different particle sizes are performed. The servo frequency conversion motor 142 is started, driving the worm 1410 to rotate, and through the engagement with the ring worm gear 143 and the gear 149, the gear 148 inside the ring drives the blocking net 146 to rotate in the screening flow tube 144, achieving uniform distribution of particles and better screening effect. At the same time, hot air enters the filtering and sterilizing moisture treatment chamber 141, and after filtering, sterilization and moisture adjustment, it enters the screening flow tube 144 through the guide valve end 147, fully contacts with the particles to achieve drying, and the particles are dried according to their own particle size and weight. The particles enter the flow tube 145 through the blocking net 146, and those that cannot pass through are discharged through the discharge holes. The flow tube 145 discharges different types of particles through the bottom holes and the side discharge holes. The electric valve controls the particles that fall from the blocking net 146 to be discharged through the discharge holes, and other particles are discharged from the holes. During the drying process, the flow tube 145, the electric discharge valve 17, the microwave moisture sensor on the surface of the electric valve, and the probes at various positions continuously monitor the moisture content and particle size changes of the particles. As the drying progresses, the detection frequency decreases.

[0048] Then, the particles discharged from the holes of the flow tube 145 enter the secondary guide chamber 10, and the particles discharged from the discharge holes enter the air flow separation chamber 9 and then enter the classification discharge chamber 13. In the secondary guide chamber 10, the particles may first pass through the high-efficiency sterilization moisture treatment chamber 11 to remove bacteria and excess moisture. Then, the particles enter the classification discharge chamber 13 through the conveying pipeline. At the same time, the lighter particles screened from the feed bin 8 to the fluidized drying bed are further dried to a qualified moisture content in a fluidized state under the action of the hot air flow. The electric discharge valve 17 controls the speed at which the particles are discharged from the fluidized drying bed. When it is detected that the drying of the particles is completed, the electric discharge valve 17 opens to discharge the dried products through the drying guide pipe 12 to the classification discharge chamber 13. The classification discharge chamber 13 classifies different particles for discharge.

[0049] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vitamin D3 granulation fluidized bed segmented drying integrated air supply system, characterized in that: The invention comprises a hot air heater (2), a feed processing component (7), a feed bin (8), a double screening component (18) and a classification drying processing component (14), wherein the feed processing component (7) is arranged on the top of the feed bin (8), the bottom of the feed bin (8) is connected to an air flow separation chamber (9), the double screening component (18) is arranged at the bottom end of the air flow separation chamber (9), and the classification drying processing component (14) is arranged in two groups and is arranged inside the top end of the air flow separation chamber (9); The classification drying treatment component (14) comprises a screening flow tube (144), a blocking net (146) is installed inside the screening flow tube (144), an electric valve is installed at the bottom of the blocking net (146), the bottom of the screening flow tube (144) is connected to a flow tube (145), a hole is opened on the bottom edge surface of the flow tube (145), and a discharge hole is opened on the side end surface of the flow tube (145), the discharge hole is used to discharge particles guided by the electric valve, and the hole is used to discharge particles guided by the flow tube (145), the mesh diameters of the two groups of the blocking nets (146) are different, and an air inlet end is installed at the top of the screening flow tube (144), and the side end of the air inlet end is connected to a controlled air guide valve pipe (6).

2. The vitamin D3 granulation fluidized bed segmented drying integrated air supply system according to claim 1, characterized in that: The classification and drying treatment component (14) also includes an installation bin (140), a filtering and sterilizing water treatment chamber (141) is installed inside the installation bin (140), a guide valve end (147) is opened on the bottom surface of the filtering and sterilizing water treatment chamber (141), a stator and rotor structure is installed on the side end of the filtering and sterilizing water treatment chamber (141), a ring worm gear (143) is installed outside the filtering and sterilizing water treatment chamber (141), and a servo variable frequency motor (142) is installed on the frame of the filtering and sterilizing water treatment chamber (141).

3. The vitamin D3 granulation fluidized bed segmented drying integrated air supply system according to claim 2, characterized in that: A worm (1410) is arranged at the bottom of the servo variable frequency motor (142), the worm (1410) is meshingly connected to the annular worm wheel (143), the bottom of the worm (1410) is connected to a gear (149), the bottom of the air inlet end is internally rotatably connected to an inner ring gear (148), the inner ring gear (148) is meshingly connected to the gear (149), and the inner ring gear (148) is used to drive the barrier net (146) to rotate in the screening flow tube (144).

4. The vitamin D3 granulation fluidized bed segmented drying integrated air supply system according to claim 1, characterized in that: The side end of the control air guide valve pipe (6) is connected to an appropriate amount distributor (5), the side end of the appropriate amount distributor (5) is connected to an air guide pipe (4), the bottom of the air guide pipe (4) is connected to a dry air distributor (3), the side end of the dry air distributor (3) is connected to a dry air guide pipe (15), the side end of the dry air guide pipe (15) is provided with an air outlet (16), the inside of the air outlet (16) is provided with a screen for preventing particles from flowing back into the dry air guide pipe (15), the side end of the dry air guide pipe (15) is provided with an air guide fan (1), the side end of the air guide fan (1) is arranged with a hot air heater (2), the side end of the hot air heater (2) is externally connected with an energy-saving heat exchange device, and the heat transfer end of the energy-saving heat exchange device is arranged inside the dry air guide pipe (15) and the air guide pipe (4).

5. The vitamin D3 granulation fluidized bed segmented drying integrated air supply system according to claim 1, characterized in that: A secondary guide chamber (10) is arranged at the bottom of the air flow separation chamber (9), the secondary guide chamber (10) is connected to the flow cylinder (145), the interior of the air flow separation chamber (9) is connected to the discharge hole, the side end of the secondary guide chamber (10) is connected to the high-efficiency sterilization moisture treatment chamber (11), the side end of the air flow separation chamber (9) is connected to the classification discharge chamber (13), the bottom of the secondary guide chamber (10) is connected to the classification discharge chamber (13) through a conveying pipeline, the bottom of the classification discharge chamber (13) is connected to a drying guide pipe (12), the side end of the drying guide pipe (12) is connected to a fluidized drying bed, an electric discharge valve (17) is arranged inside the side end of the fluidized drying bed, and the electric discharge valve (17) is arranged on the right side of the screen.

6. The vitamin D3 granulation fluidized bed segmented drying integrated air supply system according to claim 1, characterized in that: The double screening component (18) comprises a mounting plate, a bidirectional frequency conversion control motor (180) is mounted on the surface of the mounting plate, the left and right output ends of the bidirectional frequency conversion control motor (180) are connected to an angle rotating member (181), the top end of the angle rotating member (181) is connected to a connecting guide rod (183), the side end of the connecting guide rod (183) is connected to a swivel member (182), the top end of the swivel member (182) is internally connected to a pulling link rod (184), there is a height difference between the pulling links (184), and the side ends of the pulling links (184) are respectively connected to a first screen end (185) and a second screen end (186).

7. The vitamin D3 granulation fluidized bed segmented drying integrated air supply system according to claim 6, characterized in that: The mesh diameter of the first screen end (185) is larger than that of the second screen end (186); a first negative pressure pneumatic adsorption duct (187) is installed on the top surface of the first screen end (185); a second negative pressure pneumatic adsorption duct (188) is installed on the side end of the second screen end (186); the side end of the first negative pressure pneumatic adsorption duct (187) is connected to a group of stator and rotor structures, and the second negative pressure pneumatic adsorption duct (188) is connected to another group of stator and rotor structures.

8. The vitamin D3 granulation fluidized bed segmented drying integrated air supply system according to claim 1, characterized in that: The feed processing assembly (7) comprises a drive structure (71), and an output end of the drive structure (71) is connected to a drying rake (72) via a pulley structure.

9. The vitamin D3 granulation fluidized bed segmented drying integrated air supply system according to claim 8, characterized in that: A drying fluidizing cylinder (73) is arranged outside the drying rake blade (72), and a conical discharge valve end (74) is connected to the bottom of the drying fluidizing cylinder (73), and the conical discharge valve end (74) is connected to the feed bin (8).

10. The vitamin D3 granulation fluidized bed segmented drying integrated air supply system according to claim 1, characterized in that: Microwave moisture sensors are installed on the surfaces of the flow tube (145), the electric discharge valve (17) and the electric valve. A probe is installed inside the feed bin (8). A near-infrared moisture sensor and a laser particle size measurement sensor are installed inside the probe. The probe is arranged in multiple groups and is located at the air outlet space at the side end of the feed bin (8) and the drying air guide pipe (15), and inside the filtration and sterilization moisture treatment chamber (141), inside the air flow separation chamber (9), and inside the fluidized drying bed. In the early stage of drying, when the moisture content of the particles changes rapidly, a high-frequency detection is set to timely capture the rapid change of moisture content. As the drying progresses, the detection frequency is reduced.

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