Intelligent flow regulation drying equipment
By designing an intelligent flow regulation drying device, the temperature difference problem of starch during airflow drying was solved, achieving uniform drying of starch and recycling of airflow, thus improving drying quality and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGSU TIANLI INTELLIGENT EQUIP MFG CO LTD
- Filing Date
- 2026-01-21
- Publication Date
- 2026-05-12
AI Technical Summary
In existing methods of drying starch, the starch comes into direct contact with high-temperature hot air during airflow drying, resulting in excessive temperature differences. This can easily lead to the formation of a hard crust, causing the starch material to clump together and affecting the drying quality.
An intelligent flow-regulating drying device was designed. The airflow in the discharge pipe is recovered and preheated through the airflow recovery section, the wet starch is dispersed by the impact section, and the hot gas compressed by the twin-screw compressor is recycled. Combined with the design of the filter screen and fan, the starch drying process is optimized.
It reduces the formation of a hard crust on the starch surface, improves drying quality, enables the recycling of airflow, saves energy, protects the environment, and optimizes the drying efficiency of starch.
Smart Images
Figure CN122015466A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of drying equipment technology, and more specifically to an intelligent flow-regulating drying device. Background Technology
[0002] In the pharmaceutical industry, pharmaceutical starch and pregelatinized starch are the most commonly used fillers in tablet production (accounting for 50-90% of the tablet weight). They also have disintegrant properties. As the "skeleton" of the tablet, they can increase the tablet volume, ensure uniform tablet weight (e.g., in a 100mg tablet, starch may account for 60-80mg), and meet the flowability requirements of the tableting process. The drying quality directly determines the tablet's formability, dissolution, and stability. The moisture content should be controlled at 10-14% (meeting pharmacopoeia standards), with no clumping, good flowability (angle of repose ≤32°), and uniform particle size (100-200 mesh).
[0003] Airflow drying (also known as flash drying) is one of the mainstream processes for starch drying, with core advantages including fast drying speed, high thermal efficiency, and uniform product quality. The essence of airflow drying is instantaneous heat and mass transfer in a gas-solid two-phase flow: wet starch is dispersed into tiny particles, which then move in parallel or counter-current flow with a high-temperature hot airflow within a pipe. Through a large gas-solid contact area, moisture evaporates rapidly within 0.5-5 seconds, and the dried starch is finally separated by a gas-solid separation device. The exhaust gas is then purified before being discharged. However, in existing airflow drying processes, starch is typically directly exposed to high-temperature hot air. This direct contact with the hot air creates a large temperature difference, which can cause the surface moisture of the starch to evaporate rapidly, forming a "hard shell" that prevents internal moisture from escaping, leading to the starch agglomerating into clumps. Summary of the Invention
[0004] In view of this, the purpose of the present invention is to provide an intelligent flow rate regulating drying device to solve the problem that when starch is dried by airflow, it is usually in direct contact with high temperature hot air. The large temperature difference between the starch material and the high temperature hot air can easily cause the surface moisture of the starch material to evaporate rapidly and form a "hard shell", which prevents the internal moisture from being discharged and causes the starch material to agglomerate into lumps.
[0005] This invention is achieved through the following technical solution: An intelligent flow-regulating drying device includes an inlet pipe, a drying pipe, and an outlet pipe. The inlet pipe is used to feed wet starch into and push it into the drying pipe. The drying pipe is connected to a hot air device, which is connected to the lower end of the drying pipe. The outlet pipe is connected to the upper end of the drying pipe. The hot air device is used to introduce hot air into the drying pipe to dry the wet starch. The starch dried in the drying pipe is then fed into the outlet pipe by the flow of the hot air for discharge. The inlet pipe includes a pipe body, a piston, a pushing part, and an impact part. The inside of the pipe body is hollow and a cylindrical receiving cavity is formed along the length of the pipe body. The pipe body is connected to the drying pipe and... The receiving cavity is connected to the interior of the drying tube. An inlet is provided at the top of the tube and the inlet connects the outer wall of the tube and the inner wall of the receiving cavity. The piston is located in the receiving cavity and can slide along the length of the tube. The side wall of the piston fits against the inner wall of the receiving cavity. The pushing part is used to push the piston to move along the length of the tube. The impact part is connected to the end of the receiving cavity connected to the drying tube, and the impact part and the side wall of the receiving cavity form a slit. It also includes an airflow recovery part, which connects the discharge pipe and the receiving cavity. The airflow recovery part is used to recover the airflow in the discharge pipe and transport the airflow to the receiving cavity.
[0006] Furthermore, the airflow recovery unit is connected to a first pipe and a second pipe. The first pipe is connected at both ends to the airflow recovery unit and to the side of the piston in the receiving cavity away from the collision part, respectively. The second pipe is connected to the side of the piston in the receiving cavity near the collision part. The pushing part includes a spring, which is located in the receiving cavity on the side of the piston away from the collision part. The two ends of the spring are connected to the piston and the inner wall of the receiving cavity, respectively. An exhaust valve is provided in the receiving cavity on the side of the piston away from the collision part. The unit also includes a controller, which is electrically connected to the airflow recovery unit and is used to control the airflow recovery unit to deliver gas to the first pipe and the second pipe.
[0007] Furthermore, the heat recovery unit also includes a twin-screw compressor, the input end of which is connected to the discharge pipe and the output end of which is connected to the first pipe, and the exhaust valve is connected to the heat device.
[0008] Furthermore, the hot air device includes a heat storage tank, with an exhaust valve and the drying pipe connected at one end of the heat storage tank facing the drying pipe. A sliding plate is slidably connected inside the heat storage tank along its length. The sliding plate matches and fits against the inner wall of the heat storage tank. An elastic element is provided at the end of the sliding plate away from the drying pipe. The two ends of the elastic element are respectively connected to the section of the sliding plate away from the drying pipe and the bottom wall of the heat storage tank.
[0009] Furthermore, the piston is rotatably connected to a second fan on the side facing the collision part, and also includes a rotating part for driving the second fan to rotate.
[0010] Furthermore, the rotating part includes a lead screw, one end of which is rotatably connected to the piston and the other end of which passes through both ends of the piston and is connected to the second fan. The end of the receiving cavity away from the collision part is recessed inward to form a first screw hole, and the other end of the lead screw is screwed into the first screw hole.
[0011] Furthermore, a filter screen is slidably connected to the lower end of the drying tube, the edge of which fits into the inner wall of the drying tube. The filter screen is elastically connected to the bottom wall of the drying tube. A first fan is rotatably connected above the filter screen. A sliding rod is connected to the lower end of the filter screen. An air outlet is connected to the lower end of the drying tube. The air outlet passes through the lower end of the drying tube and connects to the inner and outer walls of the drying tube. The sliding rod is slidably fitted into the inner wall of the air outlet. The lower end of the air outlet has an enlarged radius to form a flared opening, which communicates with the heat storage tank. An adjusting rod is connected to the lower end of the sliding rod. A gap is formed between the adjusting rod and the inner circumferential wall of the air outlet to allow airflow. The air outlet is located inside the drying tube near the bottom wall and has multiple air outlet holes. The lower end of the adjusting rod has an enlarged radius to form an enlarged head, the outer circumferential surface of which is parallel to the inner circumferential surface of the flared opening.
[0012] Furthermore, an adjusting plate is provided on the side of the piston away from the drying tube. The adjusting plate is slidably fitted into the tube body. A second screw hole is provided in the middle of the adjusting plate. The second screw hole is screwed into the lead screw. The exhaust valve is located between the adjusting plate and the piston. The adjusting plate is connected to the sliding plate.
[0013] The beneficial effects of this invention are as follows: 1. This intelligent flow regulation drying equipment, by setting up an airflow recovery unit, recovers the airflow in the discharge pipe and circulates it for preheating wet starch. This can reduce the possibility that wet starch will directly contact the overheated gas, thereby forming a hard shell on the surface and making it difficult to dry inside, thus improving the quality of starch drying.
[0014] 2. This intelligent flow regulating drying equipment, by setting up a collision part, allows wet starch to be quickly dispersed under the collision of the collision part, so that the wet starch can have a larger contact area with the hot airflow, making it easier for the hot airflow to dry the wet starch.
[0015] 3. This intelligent flow-regulating drying equipment uses a twin-screw compressor to compress and collect the recovered gas, which is then used to drive the wet starch to impact and disperse. Because the gas generates heat during compression, it can continue to circulate into the drying tube after driving the wet starch to impact and disperse, thus achieving airflow recycling, reducing heat emissions, protecting the environment, and saving energy.
[0016] 4. This intelligent flow-regulating drying equipment uses the amount of wet starch that falls onto the filter plate after collision to move the filter plate up and down, thereby determining the pre-drying status of the wet starch. The pre-drying status is reflected in the distance between the expanding head and the flare, thus controlling the airflow velocity. The airflow velocity responds to the pre-drying status of the wet starch, accelerating or decreasing the airflow velocity for better drying. Furthermore, by controlling the pre-drying operation within the feed pipe through flow velocity linkage, the pre-drying of wet starch within the feed pipe can be optimized, thereby improving the drying quality.
[0017] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic cross-sectional view of the structure of the present invention; Figure 3 For the present invention Figure 2 A partial structural diagram of A in the middle; Figure 4 For the present invention Figure 2 A schematic diagram of the partial structure of B in the diagram.
[0019] In the diagram: 1. Feed pipe; 11. Feed inlet; 2. Drying pipe; 21. Pipe body; 211. Filter screen; 212. First fan; 213. Sliding rod; 2131. Expanding head; 2132. Adjusting rod; 214. Air outlet; 2141. Flange; 2141. Air outlet hole; 22. Receiving cavity; 23. Piston; 24. Spring; 25. Impact part; 26. Lead screw; 27. Second fan; 28. First screw hole; 29. Adjusting plate; 291. Second screw hole; 3. Discharge pipe; 4. Hot air device; 41. Heat storage tank; 411. Sliding plate; 412. Elastic element; 5. Airflow recovery part; 51. First pipe; 52. Second pipe. Detailed Implementation
[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.
[0021] Please see Figure 1-4This invention provides a technical solution for an intelligent flow-regulating drying device: an intelligent flow-regulating drying device includes an inlet pipe 1, a drying pipe 2, and an outlet pipe 3. The inlet pipe 1 is used to feed wet starch and push it into the drying pipe 2. The drying pipe 2 is connected to a hot air device 4, which is connected to the lower end of the drying pipe 2, and the outlet pipe 3 is connected to the upper end of the drying pipe 2. The hot air device 4 is used to introduce hot air into the drying pipe 2 to dry the wet starch. The starch dried by the drying pipe 2 is sent to the outlet pipe 3 for discharge by the flow of the hot air. The inlet pipe 1 includes a pipe body 21, a piston 23, a pushing part, and an impact part 25. The pipe body 21 is hollow inside and has a cylindrical receiving cavity 22 formed along its length. The pipe body 21 is connected to the... The drying tube 2 is connected to the receiving cavity 22. The tube body 21 is provided with an inlet 11, which is connected to the outer wall of the tube body 21 and the inner wall of the receiving cavity 22. The piston 23 is located in the receiving cavity 22 and can slide along the length of the tube body 21. The side wall of the piston 23 is in contact with the inner wall of the receiving cavity 22. The pushing part is used to push the piston 23 to move along the length of the tube body 21. The impact part 25 is connected to the end of the receiving cavity 22 connected to the drying tube 2, and the impact part 25 and the side wall of the receiving cavity 22 form a slit. The drying tube 22 also includes an airflow recovery part 5, which is connected to the discharge tube 3 and the receiving cavity 22. The airflow recovery part 5 is used to recover the airflow in the discharge tube 3 and transport the airflow to the receiving cavity 22.
[0022] When using the intelligent flow regulating drying device of the present invention to dry wet starch, the hot air device 4 is first turned on. The hot air device 4 generates hot air that passes through the drying pipe 2 to dry the starch and then enters the airflow recovery section 5 through the discharge pipe 3. The airflow recovery section 5 recovers the airflow and then introduces it into the receiving cavity 22. Since the receiving cavity 22 is used to put wet starch, the temperature of the hot air recovered by the airflow recovery section 5 decreases after passing through the drying pipe 2 and the discharge pipe 3. It is then introduced into the receiving cavity 22 again to preheat and dry the wet starch. In this way, the possibility of wet starch directly contacting the high temperature airflow and forming a hard shell on the surface, making it difficult for subsequent hot air to dry the inside of the wet starch, can be reduced.
[0023] Since the piston 23 is located inside the receiving cavity 22 and can slide along the length of the tube 21, the side wall of the piston 23 is in contact with the inner wall of the receiving cavity 22. The pushing part is used to push the piston 23 to move along the length of the tube 21. The impact part 25 is connected to one end of the receiving cavity 22 and the drying tube 2. After the wet starch enters the receiving cavity 22 and is preheated, the pushing part pushes the piston 23 from the end away from the impact part 25 to the end close to the impact part 25, thereby pushing the wet starch to move quickly to the impact part 25 and to collide with the impact part 25 and disperse it. During the process, the hot airflow generated by the airflow recovery part 5 preheats and dries the wet starch. A slit is formed between the impact part 25 and the receiving cavity 22. The starch dispersed by the impact can enter the drying tube 2 through the slit. The dispersed and preheated starch is more easily dried by the hot airflow. In this way, the possibility of starch clumping can be reduced and the starch can be dried better.
[0024] In this embodiment: the airflow recovery unit 5 is connected to a first pipe 51 and a second pipe 52. The two ends of the first pipe 51 are respectively connected to the airflow recovery unit 5 and the side of the piston 23 in the receiving cavity 22 away from the collision part. The second pipe 52 is connected to the side of the piston 23 in the receiving cavity 22 close to the collision part. The pushing part includes a spring 24. The spring 24 is located in the receiving cavity 22 on the side of the piston 23 away from the collision part. The two ends of the spring 24 are respectively connected to the piston 23 and the inner wall of the receiving cavity 22. An exhaust valve is provided in the receiving cavity 22 on the side of the piston 23 away from the collision part. The receiving cavity 22 also includes a controller. The controller is electrically connected to the airflow recovery unit 5. The controller is used to control the airflow recovery unit 5 to deliver gas to the first pipe 51 and the second pipe 52.
[0025] Before drying wet starch using the intelligent flow regulating drying device of the present invention, spring 24 drives piston 23 to stop at the end of inlet 11 away from the collision part. During drying, airflow recovery unit 5 first introduces preheated hot air into second pipe 52. Since second pipe 52 connects to the side of piston 23 near the collision part in receiving cavity 22, hot air fills the side of piston 23 near the collision part in receiving cavity 22 from second pipe 52. At this time, wet starch is put into inlet 11. When piston 23 pushes the wet starch to move and collide with the collision part, it can preheat the dispersed wet starch and remove excess moisture from the surface. After wet starch is put into inlet 11, controller controls airflow recovery unit 5 to instantly deliver hot air to first pipe 51, pushing piston 23 to move quickly toward the collision part, thereby pushing the wet starch to move away from the collision part. The starch moves towards the collision part to disperse the wet starch. At this time, the spring 24 is pushed by the airflow and is in an extended state. Since the accommodating cavity 22 is equipped with an exhaust valve on the side of the piston 23 away from the collision part, the exhaust valve opens after the piston 23 completes one push of starch. The gas on the side of the piston 23 away from the collision part is gradually discharged, and the pressure on the side of the piston 23 away from the collision part gradually decreases, so that it can no longer push the spring 24 to extend. The spring 24 then drives the piston 23 to gradually return to its original position. When the piston 23 moves to the side of the inlet 11 away from the collision part, the exhaust valve closes, and then the next push is performed. In this way, the pushing part can be used to push the piston 23 to move along the length of the tube 21. At the same time, since the piston 23 is driven by the recycled airflow, the airflow can be recycled under certain circumstances, reducing resource waste.
[0026] In this embodiment: the heat recovery unit further includes a twin-screw compressor, the input end of which is connected to the discharge pipe 3 and the output end is connected to the first pipe 51, and the exhaust valve is connected to the heat device 4.
[0027] Since the heat recovery unit includes a twin-screw compressor, the input end of which is connected to the discharge pipe 3, the gas discharged from the discharge pipe 3 is compressed and collected by the twin screws of the twin-screw compressor. The compressed air is discharged by the output end of the twin-screw compressor to the second pipe 52 and then enters the receiving cavity 22 to push the piston 23 to move. After that, it is discharged through the exhaust valve and then introduced into the heat device 4. Since the gas molecules are squeezed closer during the gas compression process, the collision frequency and intensity are greatly increased, and the kinetic energy is converted into heat energy, making the gas hot. The heated gas is introduced into the drying pipe 2 to dry and heat the starch in the drying pipe 2.
[0028] In this way, the preheating of wet starch is achieved by recovering hot air, and the hot air discharged by compression causes the compressed gas to drive the piston 23 to move and collide, which also heats up the gas. This allows the gas to re-enter the drying tube 2 to dry the starch, thus achieving a more complete circulation of airflow.
[0029] In this embodiment: the hot air device 4 includes a heat storage tank 41. The end of the heat storage tank 41 facing the drying pipe 2 is connected to the exhaust valve and the drying pipe 2. A sliding plate 411 is slidably connected inside the heat storage tank 41 along its length. The sliding plate 411 matches and fits against the inner wall of the heat storage tank 41. An elastic element 412 is provided at the end of the sliding plate 411 away from the drying pipe 2. The two ends of the elastic element 412 are respectively connected to the section of the sliding plate 411 away from the drying pipe 2 and the bottom wall of the heat storage tank 41.
[0030] When compressed air is discharged through the exhaust valve, it enters the end of the heat storage tank 41 facing the drying pipe 2. At this time, the heat storage tank 41 can store the hot air and transport it to the drying pipe 2. Since a sliding plate 411 is slidably connected along the length of the heat storage tank 41, and the sliding plate 411 matches and fits against the inner wall of the heat storage tank 41, an elastic element 412 is provided at the end of the sliding plate 411 facing away from the drying pipe 2. The two ends of the elastic element 412 are respectively connected to the section of the sliding plate 411 facing away from the drying pipe 2 and the bottom wall of the heat storage tank 41. The extension and compression of the elastic element 412 can increase the space at the end of the sliding plate 411 facing the drying pipe 2. When the exhaust valve introduces hot air into the heat storage tank 41, the increased air pressure at the end of the sliding plate 411 facing the drying tube 2 can push the elastic element 412 to shorten, thereby increasing the space at the end of the sliding plate 411 facing the drying tube 2 inside the heat storage tank 41, thus decreasing the air pressure at the end of the sliding plate 411 facing the drying tube 2 inside the heat storage tank 41. When the air pressure inside the heat storage tank 41 decreases, the elastic element 412 pushes the sliding plate 411 to reduce the space above it, thereby adjusting the air pressure. In this way, the air pressure inside the heat storage tank 41 can be maintained at a certain level of equilibrium, so that the hot air device 4 can continuously deliver hot air into the drying tube 2.
[0031] In this embodiment, the piston 23 is rotatably connected to the second fan 27 on the side facing the collision part, and also includes a rotating part, which is used to drive the second fan 27 to rotate.
[0032] Because wet starch has a certain viscosity, when wet starch enters the feed port 11, the rotation of the rotating part can drive the second fan 27 to rotate, thereby dispersing the wet starch to a certain extent, increasing the contact area between the preheating gas and the wet starch, so that the wet starch can be fully preheated; at the same time, it reduces the possibility that the wet starch will block the receiving cavity 22, making it difficult for the piston 23 to push the wet starch to move and collide with the collision part, thus ensuring the normal operation of the present invention to a certain extent.
[0033] In this embodiment: the rotating part includes a lead screw 26, one end of the lead screw 26 is rotatably connected to the piston 23 and the other end of the lead screw 26 passes through the two end faces of the piston 23 and is connected to the second fan 27. The end of the receiving cavity 22 away from the collision part is recessed inward to form a screw hole, and the other end of the lead screw 26 is screwed into the screw hole.
[0034] Since one end of the lead screw 26 is rotatably connected to the piston 23 and the other end of the lead screw 26 passes through both ends of the piston 23 and is connected to the second fan 27, when the piston 23 moves along the length of the receiving cavity 22, it can drive the second fan 27 to move along the length of the receiving cavity 22. The rotation of the lead screw 26 can drive the fan to rotate without affecting the movement of the piston 23. Since the other end of the lead screw 26 is screwed into the first screw hole 28, the lead screw 26 will rotate due to the screwing into the first screw hole 28 when it moves along the length of the receiving cavity 22. Specifically, by adjusting the thread helix angle between the lead screw 26 and the first screw hole 28 to reduce the self-locking property of the lead screw 26, the lead screw 26 can rotate due to the screwing into the first screw hole 28 during the movement, thereby driving the second fan 27 to rotate. With this structure, when gas is introduced into the end of the piston 23 away from the drying tube 2 in the receiving cavity 22, thereby driving the piston 23 to reciprocate, the second fan 27 can rotate without the need for other power mechanisms, thus saving energy to a certain extent.
[0035] In this embodiment: a filter screen 211 is slidably connected to the lower end of the drying tube 2. The edge of the filter screen 211 fits into the inner wall of the drying tube 2. The filter screen 211 is elastically connected to the bottom wall of the drying tube 2. A first fan 212 is rotatably connected above the filter screen 211. A sliding rod 213 is connected to the lower end of the filter screen 211. An air outlet 214 is connected to the lower end of the drying tube 2. The air outlet 214 passes through the lower end of the drying tube 2 and connects the inner and outer walls of the drying tube 2. The sliding rod 213 is slidably fitted inside the air outlet 214. The lower end of the air outlet 214 is enlarged to form a flared opening 2141, which is connected to the heat storage tank 41. The lower end of the sliding rod 213 is connected to an adjusting rod 2132. The adjusting rod 2132 and the inner peripheral wall of the air outlet 214 are spaced apart to form a gap for airflow. The air outlet 214 is located inside the drying tube 2 near the bottom wall of the drying tube 2 and has multiple air outlet holes 2141. The lower end of the adjusting rod 2132 is enlarged to form an enlarged head 2131, and the outer peripheral surface of the enlarged head 2131 is parallel to the inner peripheral surface of the flared opening 2141.
[0036] Since the air outlet 214 passes through the lower end of the drying tube 2 and connects the inner and outer walls of the drying tube 2, the sliding rod 213 is slidably fitted to the inner wall of the air outlet 214. The lower end of the sliding rod 213 is connected to an adjusting rod 2132. The outer peripheral wall of the adjusting rod 2132 and the inner peripheral wall of the air outlet 214 form a gap that allows airflow to pass through. The air outlet 214 is located inside the drying tube 2 near the bottom wall of the drying tube 2 and has multiple air outlet holes 2141. Airflow can pass through the gap formed between the outer peripheral wall of the adjusting rod 2132 and the inner peripheral wall of the air outlet 214 from the lower end of the air outlet 214, and then enter the drying tube 2 from the air outlet.
[0037] Because the lower radius of the air outlet 214 is enlarged to form a flared opening 2141, and the lower radius of the adjusting rod 2132 is enlarged to form an enlarged head 2131, the outer circumferential surface of the enlarged head 2131 is parallel to the inner circumferential surface of the flared opening 2141. When the filter screen 211 moves downward, causing the enlarged head 2131 to move downward, the distance between the enlarged head 2131 and the flared opening 2141 increases, the gap between the outer circumferential surface of the enlarged head 2131 and the inner circumferential surface of the flared opening 2141 increases, the space for gas flow increases, and more gas flows into the drying tube 2 per unit time. When the filter screen 211 moves upward, causing the enlarged head 2131 to move upward, the distance between the enlarged head 2131 and the flared opening 2141 decreases, the gap between the outer circumferential surface of the enlarged head 2131 and the inner circumferential surface of the flared opening 2141 decreases, the space for gas flow decreases, and less gas flows into the drying tube 2 per unit time.
[0038] Because the lower end of the drying tube 2 is slidably connected to a filter screen 211, the edge of the filter screen 211 fits into the inner wall of the drying tube 2, and the filter screen 211 is elastically connected to the bottom wall of the drying tube 2, after the wet starch is preheated and collided, most of the starch will disperse into powder. This powder will float upwards as it is blown by the hot air from the drying tube 2, while a small amount of clumps of wet starch will fall onto the filter screen 211. When too much wet starch remains on the filter screen 211, it will push the filter screen 211 downwards, causing it to move downwards and simultaneously moving the sliding rod 213 and the expanding head 2131. As the filter moves downwards, the distance between the expanding head 2131 and the flare 2141 increases, allowing more gas to flow into the drying tube 2 per unit time. This results in a larger flow of hot air, facilitating the drying of the wet starch. Simultaneously, since the filter screen 211 is rotatably connected to the first fan 212, the airflow drives the first fan 212 to rotate, which can beat the wet starch, thus dispersing it. When the airflow increases, it drives the fan speed to increase, further lifting and beating the wet starch falling on the filter screen 211 at a higher speed, causing the wet starch to diffuse and further ensuring the drying efficiency of the starch.
[0039] In this embodiment: the piston 23 is provided with an adjusting plate 29 on the side away from the drying tube 2. The adjusting plate 29 is slidably fitted inside the tube body 21. The adjusting plate 29 is provided with a second screw hole 291 in the middle. The second screw hole 291 is screwed into the lead screw 26. The exhaust valve is located between the adjusting plate 29 and the piston 23. The adjusting plate 29 is connected to the sliding plate 411.
[0040] Since the adjusting plate 29 is connected to the sliding plate 411, when the gas pressure in the gas storage pipe is too low, the spring 24 pushes the sliding plate 411 to move towards the drying pipe 2. The sliding plate 411 then drives the adjusting plate 29 to move towards the drying pipe 2, thereby reducing the gap between the adjusting plate 29 and the piston 23. When the twin-screw compressor fills the space between the sliding plate 411 and the piston 23 with compressed gas, the pressure between the piston 23 and the sliding plate 411 is greater, and the instantaneous pressure of the gas on the piston 23 is greater. This allows the piston 23 to move towards the drying pipe 2 more quickly, thereby causing the compressed gas to push the wet starch to impact at a higher speed, resulting in more thorough impact and dispersion of the wet starch. At the same time, the piston 23 will drive the second fan 27 to move at a higher speed during its faster movement, thereby making the second fan 27 rotate faster and more effectively impacting and dispersing the wet starch, further dispersing the wet starch.
[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. An intelligent flow-regulating drying device, comprising an inlet pipe, a drying pipe, and an outlet pipe, wherein the inlet pipe is used to feed wet starch and push it into the drying pipe, the drying pipe is connected to a hot air device, the hot air device is connected to the lower end of the drying pipe, and the outlet pipe is connected to the upper end of the drying pipe, the hot air device is used to introduce hot air into the drying pipe to dry the wet starch, and the starch dried by the drying pipe is sent to the outlet pipe for discharge by the flow of the hot air, characterized in that: The feed tube includes a tube body, a piston, a pushing part, and an impact part. The tube body is hollow inside and has a cylindrical receiving cavity formed along its length. The tube body is connected to the drying tube, and the receiving cavity is in communication with the inside of the drying tube. An inlet is provided at the top of the tube body, and the inlet is connected to the outer wall of the tube body and the inner wall of the receiving cavity. The piston is located in the receiving cavity and can slide along the length of the tube body. The side wall of the piston is in contact with the inner wall of the receiving cavity. The pushing part is used to push the piston to move along the length of the tube body. The impact part is connected to the end of the receiving cavity connected to the drying tube, and a slit is formed between the impact part and the side wall of the receiving cavity. The tube body also includes an airflow recovery part, which is connected to the discharge tube and the receiving cavity. The airflow recovery part is used to recover the airflow in the discharge tube and transport the airflow to the receiving cavity.
2. The intelligent flow regulating drying device according to claim 1, characterized in that: The airflow recovery unit is connected to a first pipe and a second pipe. The first pipe is connected at both ends to the airflow recovery unit and to the side of the piston in the receiving cavity away from the collision part, respectively. The second pipe is connected to the side of the piston in the receiving cavity close to the collision part. The pushing part includes a spring, which is located in the receiving cavity on the side of the piston away from the collision part. The two ends of the spring are connected to the piston and the inner wall of the receiving cavity, respectively. An exhaust valve is provided in the receiving cavity on the side of the piston away from the collision part. The unit also includes a controller, which is electrically connected to the airflow recovery unit and is used to control the airflow recovery unit to deliver gas to the first pipe and the second pipe.
3. The intelligent flow regulating drying device according to claim 2, characterized in that: The heat recovery unit also includes a twin-screw compressor, the input end of which is connected to the discharge pipe and the output end of which is connected to the first pipe, and the exhaust valve is connected to the heat recovery device.
4. The intelligent flow regulating drying device according to claim 3, characterized in that: The hot air device includes a heat storage tank. The end of the heat storage tank facing the drying pipe is connected to an exhaust valve and the drying pipe. A sliding plate is slidably connected inside the heat storage tank along its length. The sliding plate matches and fits against the inner wall of the heat storage tank. An elastic element is provided at the end of the sliding plate away from the drying pipe. The two ends of the elastic element are respectively connected to the section of the sliding plate away from the drying pipe and the bottom wall of the heat storage tank.
5. The intelligent flow regulating drying device according to claim 4, characterized in that: The piston is rotatably connected to a second fan on the side facing the collision part, and also includes a rotating part for driving the second fan to rotate.
6. The intelligent flow regulating drying device according to claim 5, characterized in that: The rotating part includes a lead screw, one end of which is rotatably connected to the piston and the other end of which passes through the two end faces of the piston and is connected to the second fan. The end of the receiving cavity away from the collision part is recessed inward to form a first screw hole, and the other end of the lead screw is screwed into the first screw hole.
7. The intelligent flow regulating drying device according to claim 6, characterized in that: A filter screen is slidably connected to the lower end of the drying tube. The edge of the filter screen fits into the inner wall of the drying tube. The filter screen is elastically connected to the bottom wall of the drying tube. A first fan is rotatably connected above the filter screen. A sliding rod is connected to the lower end of the filter screen. An air outlet is connected to the lower end of the drying tube. The air outlet passes through the lower end of the drying tube and connects to the inner and outer walls of the drying tube. The sliding rod is slidably fitted into the inner wall of the air outlet. The lower end of the air outlet has an enlarged radius to form a flared opening. The flared opening is connected to a heat storage tank. An adjusting rod is connected to the lower end of the sliding rod. A gap is formed between the adjusting rod and the inner circumferential wall of the air outlet to allow airflow. The air outlet is located inside the drying tube near the bottom wall and has multiple air outlet holes. The lower end of the adjusting rod has an enlarged radius to form an enlarged head. The outer circumferential surface of the enlarged head is parallel to the inner circumferential surface of the flared opening.
8. The intelligent flow regulating drying device according to claim 7, characterized in that: An adjusting plate is provided on the side of the piston away from the drying tube. The adjusting plate is slidably fitted into the tube body. A second screw hole is provided in the middle of the adjusting plate. The second screw hole is screwed into the lead screw. The exhaust valve is located between the adjusting plate and the piston. The adjusting plate is connected to the sliding plate.