A high-efficiency drying device for powdered raw materials

Abstract

The invention discloses a high-efficiency drying device for powdered raw materials, and relates to the field of strontium titanate powder processing. The high-efficiency drying device for powdered raw materials comprises a drying bin and a powder washing pool arranged at the front end of the drying bin, and a circulating conveyor belt is arranged inside the drying bin; the circulating conveyor belt comprises a loading position, a draining position, a drying position, an upward position and a lowering position. The high-efficiency drying device for powdered raw materials uses a metal filter fine mesh on the circulating conveyor belt to enter the powder washing pool to salvage a thin and uniform layer of strontium titanate wet material, and then the strontium titanate wet material follows the circulating conveyor belt to pass through the draining position, the drying position, the upward position and the lowering position in turn to complete the dehydration and drying of the strontium titanate material, and then the strontium titanate powder and the circulating conveyor belt are exchanged in the upper and lower positions to realize the downward pouring to the lowering conveyor belt, and finally the material is discharged, so as to achieve the purpose of cyclic continuous operation, and the material is dried in place at one time, and there is no need to dry it repeatedly, so as to avoid the problem of agglomeration of large pieces of strontium titanate wet material.

Description

Technical Field

[0001] The invention relates to the technical field of strontium titanate powder processing, in particular to a high-efficiency drying device for powdered raw materials. Background Art

[0002] Strontium titanate has a typical perovskite structure and is a widely used electronic functional ceramic material. It has the advantages of high dielectric constant, low dielectric loss, good thermal stability, etc. It is widely used in the electronics, machinery and ceramic industries. At the same time, as a functional material, strontium titanate has the characteristics of high bandgap width. There are many production methods for strontium titanate, including strontium carbonate and titanium dioxide methods.

[0003] In this method, strontium carbonate, titanium dioxide and other additives in equal amounts are mixed and ground, then extruded and calcined in an electric furnace at 1100-1200°C for 2.5-3 hours, and the calcined product is crushed, acid-washed, filtered, washed and dried to obtain strontium titanate.

[0004] In the prior art, the strontium titanate powder obtained by filtering and washing is usually a wet material, which is put into a drying equipment for tumbling and drying. However, during actual drying, due to the large thickness of the wet material, on the one hand, the material will stick together and agglomerate with the inner wall of the equipment, the surface of the block material will harden, and the internal moisture content will exceed the standard, requiring multiple crushing and drying. On the other hand, the overall drying speed is slow, the process is discontinuous, and the equipment cost is high. Therefore, a high-efficiency drying device for powdered raw materials is provided to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a highly efficient drying device for powdered raw materials, which solves the problems of slow drying speed, discontinuous drying operation and the need for repeated drying and crushing during the drying process of the existing strontium titanate wet materials.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-efficiency drying device for powdered raw materials, comprising a drying bin and a powder washing pool arranged at the front end of the drying bin, wherein a circulating conveyor belt is arranged inside the drying bin;

[0007] The circulating conveyor belt has rubber belts on the sides and a metal filter mesh in the middle, and a separating rubber strip is arranged on the inner wall of the metal filter mesh;

[0008] The circulating conveyor belt comprises a loading position, a draining position, a drying position, an upward position and a lowering position, and the loading position, the draining position, the drying position, the upward position and the lowering position are connected end to end to form a whole circulating conveyor belt;

[0009] The material loading position is immersed in the powder washing pool to salvage the powder material in the powder washing pool;

[0010] A water blowing fan is arranged on the top of the draining position, and the water blowing fan is used to remove water from the powder;

[0011] A drying mechanism is provided on the top of the drying position, and the drying mechanism is used for drying the powder;

[0012] An auxiliary feeding conveyor belt is arranged inside the upper position, and the auxiliary feeding conveyor belt is in contact with the inner wall of the upper position to prevent the powder from falling;

[0013] A vibrating screen mechanism is arranged at the top of the material discharging position, and the vibrating screen mechanism is used to peel off the powder on the metal filter fine mesh; a discharging mechanism is arranged at the bottom of the material discharging position, and the discharging mechanism is used to receive the powder and transport it outward.

[0014] Preferably, drive chains fixed to the rubber belt are provided on both sides of the inner wall of the circulating conveyor belt, a support stand is fixedly provided in the powder washing pool, a drive motor is fixedly installed on one side of the support stand, a sprocket is fixedly installed on the output end of the drive motor, and the sprocket is meshed with the drive chain.

[0015] Preferably, the drying mechanism includes a hollow partition fixedly arranged in the middle of the drying bin, the hollow partition separates the upper and lower sides of the interior of the drying bin, and the two sides and the bottom of the hollow partition are open. An electric heating tube is installed inside the drying bin, and air intake fans are installed on both sides of the outer wall of the drying bin, the air intake fans are connected to the openings on both sides of the hollow partition, the bottom opening of the hollow partition is opposite to the drying position, and the discharging mechanism is arranged above the hollow partition.

[0016] Preferably, the discharging mechanism includes a discharge conveyor belt fixedly mounted on the top of the hollow partition and inclined guide plates arranged on the top of both sides of the discharge conveyor belt, the inclined guide plates are fixedly mounted on the inner wall of the drying bin, and a lateral inclined discharge channel is arranged on the top of the powder washing pool, and the end of the discharge conveyor belt is opposite to the inclined discharge channel.

[0017] Preferably, a scraper cleaning roller is rotatably provided at the end of the unloading conveyor belt, and a transmission chain is installed between the scraper cleaning roller and the unloading conveyor belt.

[0018] Preferably, the vibrating screen mechanism includes a suspension rope fixedly arranged on the top of the drying bin, a vibrating screen plate is suspended at the bottom end of the suspension rope, a vibration motor is fixedly mounted on the upper surface of the vibrating screen plate, and densely arranged silicone protrusions are provided at the bottom of the vibrating screen plate, and the silicone protrusions are in contact with the top surface of the lower material position.

[0019] Preferably, the auxiliary loading conveyor belt is bent through a plurality of long rollers to form a horizontal laminating portion, an upward laminating portion and a top supporting portion, the horizontal laminating portion is laminating to the top of the end of the drying position, the top supporting portion is located between the unloading position and the unloading conveyor belt, and a fixed support plate is provided on the side of the upward laminating portion away from the loading position, the fixed support plate is provided on the inner side of the upward laminating portion and presses the upward laminating portion outwardly so that the upward laminating portion is tightly attached to the upper position.

[0020] Preferably, suspended support plates are fixedly provided on both sides of the inner wall of the drying bin, the suspended support plates are located between the rubber belt and the separating rubber strip, the long roller is rotatably provided in the suspended support plates, a servo motor for driving the auxiliary feeding conveyor belt to move is fixedly provided on the suspended support plates, an auxiliary support rod is installed between the suspended support plates and the fixed support plates, a scraper is fixedly provided between the top two groups of suspended support plates, and the scraper is in contact with the lower surface of the top supporting part.

[0021] Preferably, a circulation collection mechanism is provided below the drain level, and the circulation collection mechanism comprises a water tank installed at the bottom of the drying bin, a mud pump is installed between the water tank and the powder washing pool, a negative pressure fan is installed on the inner wall of the water tank, a waterproof cover is provided on the top surface of the input end of the negative pressure fan, aerators are provided on both sides of the inner bottom of the powder washing pool, and the output end of the negative pressure fan is connected to the aerator.

[0022] Preferably, the drying mechanism further comprises a dehumidifying fan arranged at the top of the drying chamber, and the dehumidifying fan exhausts the air in the area above the hollow partition.

[0023] The present invention discloses a high-efficiency drying device for powdered raw materials, which has the following beneficial effects:

[0024] 1. The efficient drying device for powdered raw materials sets a circulating conveyor belt between the drying bin and the powder washing pool, and uses the metal filter mesh on the circulating conveyor belt to enter the powder washing pool to salvage a thin and uniform layer of strontium titanate wet material. Then, the strontium titanate wet material follows the circulating conveyor belt and passes through the draining position, drying position, upward position and unloading position in sequence to complete the dehydration and drying of the strontium titanate material. Then, the upper and lower positions of the strontium titanate powder and the circulating conveyor belt are exchanged to realize downward pouring to the unloading conveyor belt, and finally the unloading is completed, so as to achieve the purpose of cyclic continuous operation. Moreover, the material is dried in place at one time without repeated drying, so as to avoid the problem of agglomeration of large pieces of strontium titanate wet material.

[0025] 2. The efficient drying device for powdered raw materials has an upward position between the drying position and the unloading position, and an auxiliary feeding conveyor belt is arranged at the upward position. When the circulating conveyor belt moves from bottom to top, the circulating conveyor belt and the strontium titanate material are flipped up and down. At this time, the auxiliary feeding conveyor belt is used to prevent the material from falling on a large scale during the upward movement of the circulating conveyor belt. At the same time, when it moves up to the unloading position, the end can be received, so that the strontium titanate powder can enter the unloading conveyor belt, thereby improving the material collection efficiency.

[0026] 3. The efficient drying device for powdered raw materials sets a circulation collection mechanism at the bottom of the drying bin, so that the water generated at the drain level flows downward into the water in the water tank and part of the powder is pumped back into the powder washing pool through the mud pump for recycling, thereby reducing water consumption and material loss. At the same time, the hollow partition separates the upper and lower layers inside the drying bin. After the hot air in the lower layer dries the material, the airflow is pumped outward through the negative pressure fan, and the bottom of the powder washing pool is aerated through the aerator to avoid the sedimentation of the strontium titanate powder in the powder washing pool. The air is aerated upward from both sides, so that the strontium titanate powder can easily follow the water flow into the top of the metal filter fine mesh, thereby realizing automatic feeding, and the hot air flow exchanges heat with the water inside the powder washing pool through the aerator, thereby realizing preheating of the strontium titanate wet material, realizing heat energy recovery and utilization, and improving energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall outer surface structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the overall bottom structure of the present invention;

[0030] Figure 3 This is a cross-sectional view of the internal structure of the drying bin of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the circulating conveyor belt of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the powder washing pool of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the vibrating screen mechanism of the present invention;

[0034] Figure 7 This is a schematic diagram of the outer surface structure of the hollow partition of the present invention;

[0035] Figure 8 This is a schematic diagram of the end structure of the unloading conveyor belt of the present invention;

[0036] Fig. 9 This is a schematic diagram of the outer surface structure of the auxiliary feeding conveyor belt of the present invention;

[0037] Fig.10 This is an exploded view of the internal structure of the auxiliary feeding conveyor belt of the present invention.

[0038] In the figure: 1. Drying bin; 2. Circulating conveyor belt; 21. Loading position; 22. Draining position; 23. Drying position; 24. Upward position; 25. Unloading position; 26. Support stand; 27. Driving motor; 28. Driving chain; 29. ​​Separating rubber strip; 210. Sprocket; 3. Discharging mechanism; 31. Unloading conveyor belt; 32. Inclined guide plate; 33. Scraping cleaning roller; 34. Driving chain; 35. Inclined unloading channel; 4. Powder washing pool; 5. Drying mechanism; 51. Inlet fan; 52. Hollow partition; 53. Electric Heat pipe; 54, dehumidifying fan; 6, vibrating screen mechanism; 61, vibrating screen plate; 62, silicone protrusion; 63, vibration motor; 64, suspension rope; 7, auxiliary feeding conveyor belt; 71, horizontal laminating part; 72, upward laminating part; 73, top supporting part; 74, suspended bracket plate; 75, servo motor; 76, fixed support plate; 77, auxiliary support rod; 78, scraper; 8, water blowing fan; 9, circulation collection mechanism; 91, water tank; 92, mud pump; 93, negative pressure fan; 94, waterproof cover; 95, aerator. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are 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.

[0040] The embodiment of the present application provides an efficient drying device for powdered raw materials, thereby solving the problems of slow drying speed, discontinuous drying operation and the need for repeated drying and crushing during the drying process of existing wet strontium titanate materials.

[0041] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] The embodiment of the invention discloses a high-efficiency drying device for powdered raw materials.

[0043] According to the attached Figure 1-10As shown, it includes a drying bin 1 and a powder washing pool 4 arranged at the front end of the drying bin 1, and a circulating conveyor belt 2 is arranged inside the drying bin 1;

[0044] The circulating conveyor belt 2 has a rubber belt on the side and a metal filter mesh in the middle. The inner wall of the metal filter mesh is provided with a separating rubber strip 29.

[0045] The circulating conveyor belt 2 includes a loading position 21, a draining position 22, a drying position 23, an upward position 24 and a lowering position 25, which are connected end to end to form a whole circulating conveyor belt 2;

[0046] The material loading position 21 is immersed in the powder washing pool 4 and is used to salvage the powder material in the powder washing pool 4;

[0047] A water blowing fan 8 is provided on the top of the draining position 22, and the water blowing fan 8 is used to remove water from the powder;

[0048] A drying mechanism 5 is provided on the top of the drying position 23, and the drying mechanism 5 is used for drying the powder;

[0049] An auxiliary feeding conveyor belt 7 is provided inside the upper position 24, and the auxiliary feeding conveyor belt 7 is in contact with the inner wall of the upper position 24 to prevent the powder from falling;

[0050] A vibrating screen mechanism 6 is provided at the top of the material discharging position 25, and the vibrating screen mechanism 6 is used to peel off the powder on the metal filter fine mesh; a discharging mechanism 3 is provided at the bottom of the material discharging position 25, and the discharging mechanism 3 is used to receive the powder and transport it outward.

[0051] Drive chains 28 fixed to the rubber belt are arranged on both sides of the inner wall of the circulating conveyor belt 2, a support stand 26 is fixedly arranged in the powder washing pool 4, a drive motor 27 is fixedly installed on one side of the support stand 26, a sprocket 210 is fixedly installed on the output end of the drive motor 27, and the sprocket 210 is meshed with the drive chain 28. A plurality of sets of auxiliary chain wheels are rotatably arranged on the inner wall of the drying bin 1, which are used to straighten the drive chain 28 and at the same time make the entire circulating conveyor belt 2 bend into a specified shape.

[0052] The drying mechanism 5 includes a hollow partition 52 fixedly arranged in the middle of the drying bin 1, the hollow partition 52 separates the upper and lower sides of the drying bin 1, and the two sides and the bottom of the hollow partition 52 are open. An electric heating tube 53 is installed inside the drying bin 1, and air intake fans 51 are installed on both sides of the outer wall of the drying bin 1. The air intake fans 51 are connected to the openings on both sides of the hollow partition 52. The bottom opening of the hollow partition 52 is opposite to the drying position 23, and the discharging mechanism 3 is arranged above the hollow partition 52.

[0053] The discharging mechanism 3 includes a discharge conveyor belt 31 fixedly mounted on the top of the hollow partition plate 52 and inclined guide plates 32 arranged on the top of both sides of the discharge conveyor belt 31. The inclined guide plates 32 are fixedly mounted on the inner wall of the drying bin 1. A lateral inclined discharge channel 35 is arranged on the top of the powder washing pool 4. The end of the discharge conveyor belt 31 is opposite to the inclined discharge channel 35.

[0054] A scraper cleaning roller 33 is rotatably provided at the end of the unloading conveyor belt 31 , and a transmission chain 34 is installed between the scraper cleaning roller 33 and the unloading conveyor belt 31 .

[0055] The vibrating screen mechanism 6 includes a suspension rope 64 fixedly arranged at the top of the drying bin 1, a vibrating screen plate 61 is suspended at the bottom end of the suspension rope 64, a vibration motor 63 is fixedly installed on the upper surface of the vibrating screen plate 61, and densely arranged silicone protrusions 62 are arranged on the bottom of the vibrating screen plate 61, and the silicone protrusions 62 are in contact with the upper top surface of the lower material position 25.

[0056] The auxiliary loading conveyor belt 7 is bent by multiple long rollers to form a horizontal laminating portion 71, an upward laminating portion 72 and a top supporting portion 73. The horizontal laminating portion 71 is attached to the top of the end of the drying position 23, and the top supporting portion 73 is located between the unloading position 25 and the unloading conveyor belt 31. A fixed support plate 76 is provided on the side of the upward laminating portion 72 away from the loading position 21. The fixed support plate 76 is provided on the inner side of the upward laminating portion 72 and squeezes the upward laminating portion 72 outward so that the upward laminating portion 72 is tightly attached to the upper position 24.

[0057] Suspended bracket plates 74 are fixedly provided on both sides of the inner wall of the drying bin 1. The suspended bracket plates 74 are located between the rubber belt and the separating rubber strip 29. During the movement of the circulating conveyor belt 2, the suspended bracket plates 74 will not collide with each other and cause jamming. The long rollers are rotatably arranged in the suspended bracket plates 74. A servo motor 75 for driving the auxiliary feeding conveyor belt 7 to move is fixedly provided on the suspended bracket plates 74. A transmission chain is installed between the end of a group of long rollers and the output end of the servo motor 75. The long rollers are driven to rotate by the chains. The wrap angle between the long rollers and the auxiliary feeding conveyor belt 7 is 270 degrees to ensure effective drive. The remaining multiple long rollers are auxiliary rollers, which are used to stretch the auxiliary feeding conveyor belt 7 to form a specified shape.

[0058] An auxiliary support rod 77 is installed between the suspended support plate 74 and the fixed support plate 76 . A scraper 78 is fixedly arranged between the top two groups of suspended support plates 74 . The scraper 78 is in contact with the lower surface of the top supporting portion 73 .

[0059] A circulation collection mechanism 9 is arranged below the drain level 22, and the circulation collection mechanism 9 comprises a water tank 91 installed at the bottom of the drying bin 1, a mud pump 92 is installed between the water tank 91 and the powder washing pool 4, a negative pressure fan 93 is installed on the inner wall of the water tank 91, and a waterproof cover 94 is arranged on the top surface of the input end of the negative pressure fan 93, and aerators 95 are arranged on both sides of the inner bottom of the powder washing pool 4, and the output end of the negative pressure fan 93 is connected to the aerator 95. The aerator 95 aerates upward from both sides to prevent the strontium titanate powder from being deposited at the bottom, and after surging upward from both sides, it circulates downward from the middle, so that the strontium titanate powder can easily move upward with the water flow and then settle downward from the middle into the top of the metal filter fine mesh, thereby realizing automatic feeding.

[0060] The drying mechanism 5 also includes a dehumidifying fan 54 arranged at the top of the drying chamber 1. The dehumidifying fan 54 extracts the air in the area above the hollow partition 52. The area above the hollow partition 52 is radiated with heat through the hollow partition 52, so that the temperature above is increased, thereby achieving baking, so that the strontium titanate powder is dried for the second time, and the water vapor generated by the drying is extracted outward through the dehumidifying fan 54.

[0061] Working principle: When the device is in use, the filtered and washed strontium titanate powder wet material is thrown into the powder washing pool 4. Under the action of the aerator 95, the strontium titanate powder in the powder washing pool 4 follows the water flow and surges upward from both sides to prevent it from settling downward. At this time, the drive motor 27 is started, and the drive motor 27 drives the drive chain 28 to move through the sprocket 210, so that the entire circulating conveyor belt 2 moves slowly, and the upper material position 21 of the circulating conveyor belt 2 is immersed below the liquid surface of the powder washing pool 4. At this time, the strontium titanate powder surges upward from both sides under the action of aeration and then settles downward from the middle. Part of the strontium titanate powder falls to the metal filter mesh in the middle, and then follows the circulating conveyor belt 2 to move to the drain position 22. At this time, water naturally drains to the bottom of the metal filter mesh under the action of gravity and enters the water tank 91. At the same time, the water blowing fan 8 is started to accelerate the downward drainage of water, so that the metal filter mesh forms a uniform thin layer of strontium titanate powder wet material;

[0062] Then the material at the draining position 22 moves to the drying position 23 along the circulating conveyor belt 2. At this time, the air intake fans 51 on both sides draw air from the outside into the hollow partition 52, and the air is heated by the electric heating tube 53 and then blown downward to quickly dry the wet strontium titanate powder. Since the dried strontium titanate powder is not stirred or squeezed and has a very thin thickness, it will not form hard and large agglomerates.

[0063] The dried strontium titanate powder continues to move forward and enters the upward position 24, at which time it first fits with the horizontal fitting portion 71 of the auxiliary feeding conveyor belt 7. The auxiliary feeding conveyor belt 7 is driven by a servo motor 75 to keep its moving speed consistent with the circulating conveyor belt 2. At this time, the dried strontium titanate powder is clamped by the metal filter mesh and the auxiliary feeding conveyor belt 7, so that the powder is between the two, and is clamped and conveyed upward by the upward fitting portion 72 until it reaches the top supporting portion 73, thereby ensuring that the material will not scatter when the metal filter mesh moves upward and flips.

[0064] At this time, the metal filter mesh is turned upside down as a whole, and the strontium titanate powder is facing downward. Some of the material will fall directly onto the top supporting portion 73, and then move forward with the auxiliary feeding conveyor belt 7, and under the action of the scraper 78, it will be separated from the auxiliary feeding conveyor belt 7 and fall onto the unloading conveyor belt 31, while some of the material will adhere to the metal filter mesh. At this time, the material enters the unloading position 25, and the vibrating screen plate 61 is in contact with the circulating conveyor belt 2 at the unloading position 25, and is vibrated by the vibration motor 63, so that the vibrating screen plate 61 is attached to the metal filter mesh here to vibrate, and at the same time, the silica gel The protrusion 62 moves back and forth and rubs on the top surface of the metal filter mesh, so that the strontium titanate powder adhering to the metal filter mesh falls onto the unloading conveyor belt 31 and the inclined guide plate 32, and is finally collected on the unloading conveyor belt 31 to complete the material separation. The separated material is conveyed to the inclined unloading channel 35 through the unloading conveyor belt 31 for unloading. In this way, the strontium titanate powder material is directly recycled and salvaged from the powder washing pool 4 for drying and unloading after filtering and washing. The whole process is continuous and efficient, and the dried strontium titanate powder has no large agglomeration, and there will be no situation of agglomeration and undrying.

[0065] At the same time, during the above operation, the water and part of the powder material entering the water tank 91 are pumped back to the powder washing pool 4 through the mud pump 92 for recycling, thereby reducing water consumption and material loss; at the same time, the hollow partition 52 separates the upper and lower layers inside the drying bin 1, so that after the hot air in the lower layer dries the material, the airflow is pumped outward through the negative pressure fan 93, and then the bottom of the powder washing pool 4 is aerated through the aerator 95 to prevent the strontium titanate powder material inside the powder washing pool 4 from settling, and at the same time, aerate upward from both sides, so that the strontium titanate powder material can easily follow the water flow upward and then settle downward from the middle into the top of the metal filter fine mesh , realize automatic loading, and by pumping out the internal hot and humid air, further reduce the water consumption, and the hot air flow exchanges heat with the water inside the powder washing pool 4 through the aerator 95, realizes preheating of the strontium titanate wet material, realizes heat energy recovery and utilization, and improves energy utilization rate, and the space above the hollow partition 52 is heated by thermal radiation through the hollow partition 52, so that the temperature in the upper space is increased, so that the strontium titanate powder can be baked for the second time when entering the unloading position 25, and the hot and humid air is extracted by the dehumidifying fan 54, so as to further reduce the water content of the finished strontium titanate powder, so that the water content of the final product meets the standard.

[0066] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A highly efficient drying device for powdered raw materials, comprising a drying chamber (1) and a powder washing pool (4) arranged at the front end of the drying chamber (1), characterized in that: A circulating conveyor belt (2) is provided inside the drying chamber (1); The circulating conveyor belt (2) has a rubber belt on the side and a metal filter mesh in the middle, and a separating rubber strip (29) is provided on the inner wall of the metal filter mesh; The circulating conveyor belt (2) comprises a loading position (21), a draining position (22), a drying position (23), an upward position (24) and a lowering position (25), wherein the loading position (21), the draining position (22), the drying position (23), the upward position (24) and the lowering position (25) are connected end to end to form an entire circulating conveyor belt (2); The material loading position (21) is immersed in the powder washing pool (4) for salvaging the powder material in the powder washing pool (4); A water blowing fan (8) is arranged on the top of the draining position (22), and the water blowing fan (8) is used to remove water from the powder; A drying mechanism (5) is provided on the top of the drying position (23), and the drying mechanism (5) is used for drying powder; An auxiliary loading conveyor belt (7) is arranged on the inner side of the upper position (24), and the auxiliary loading conveyor belt (7) is in contact with the inner wall of the upper position (24) to prevent powder from falling; A vibrating sieve mechanism (6) is provided at the top of the material discharge position (25), and the vibrating sieve mechanism (6) is used to peel off the powder on the metal filter fine mesh; a discharging mechanism (3) is provided at the bottom of the material discharge position (25), and the discharging mechanism (3) is used to receive the powder and transport it outward; The auxiliary loading conveyor belt (7) is bent by a plurality of long rollers to form a horizontal laminating portion (71), an upward laminating portion (72) and an upper supporting portion (73); the horizontal laminating portion (71) is attached to the top of the end of the drying position (23); the upper supporting portion (73) is located between the unloading position (25) and the unloading conveyor belt (31); a fixed support plate (76) is provided on the side of the upward laminating portion (72) away from the loading position (21); the fixed support plate (76) is provided on the inner side of the upward laminating portion (72) and presses the upward laminating portion (72) outwardly, so that the upward laminating portion (72) is closely attached to the upward position (24); Suspended support plates (74) are fixedly arranged on both sides of the inner wall of the drying bin (1), and the suspended support plates (74) are located between the rubber belt and the separating rubber strip (29). The long roller is rotatably arranged in the suspended support plates (74), and a servo motor (75) for driving the auxiliary feeding conveyor belt (7) to move is fixedly arranged on the suspended support plates (74). An auxiliary support rod (77) is installed between the suspended support plates (74) and the fixed support plates (76). A scraper (78) is fixedly arranged between the two groups of suspended support plates (74) at the top, and the scraper (78) is in contact with the lower surface of the top supporting portion (73).

2. The high-efficiency drying device for powdered raw materials according to claim 1, characterized in that: Drive chains (28) fixed to the rubber belt are arranged on both sides of the inner wall of the circulating conveyor belt (2); a support stand (26) is fixedly arranged in the powder washing pool (4); a drive motor (27) is fixedly mounted on one side of the support stand (26); a sprocket (210) is fixedly mounted on the output end of the drive motor (27); and the sprocket (210) is meshed with the drive chain (28).

3. The high-efficiency drying device for powdered raw materials according to claim 1, characterized in that: The drying mechanism (5) comprises a hollow partition (52) fixedly arranged in the middle of the drying bin (1), the hollow partition (52) separating the upper and lower sides of the drying bin (1), and the two sides and the bottom of the hollow partition (52) are open. An electric heating pipe (53) is installed inside the drying bin (1), and air intake fans (51) are installed on both sides of the outer wall of the drying bin (1), and the air intake fans (51) are connected to the openings on both sides of the hollow partition (52). The bottom opening of the hollow partition (52) faces the drying position (23), and the discharging mechanism (3) is arranged above the hollow partition (52).

4. The high-efficiency drying device for powdered raw materials according to claim 3, characterized in that: The discharging mechanism (3) comprises a material discharging conveyor belt (31) fixedly mounted on the top of the hollow partition plate (52) and inclined material guide plates (32) arranged on the top of both sides of the material discharging conveyor belt (31), wherein the inclined material guide plates (32) are fixedly mounted on the inner wall of the drying bin (1), and a lateral inclined material discharging channel (35) is arranged on the top of the powder washing pool (4), and the end of the material discharging conveyor belt (31) is directly opposite to the inclined material discharging channel (35).

5. The high-efficiency drying device for powdered raw materials according to claim 4, characterized in that: A scraper cleaning roller (33) is rotatably provided at the end of the unloading conveyor belt (31), and a transmission chain (34) is installed between the scraper cleaning roller (33) and the unloading conveyor belt (31).

6. The high-efficiency drying device for powdered raw materials according to claim 1, characterized in that: The vibrating screen mechanism (6) comprises a suspension rope (64) fixedly arranged at the top of the drying bin (1), a vibrating screen plate (61) being suspended at the bottom end of the suspension rope (64), a vibrating motor (63) being fixedly mounted on the upper surface of the vibrating screen plate (61), and densely arranged silicone protrusions (62) being arranged at the bottom of the vibrating screen plate (61), and the silicone protrusions (62) are in contact with the upper top surface of the lower material position (25).

7. The high-efficiency drying device for powdered raw materials according to claim 1, characterized in that: A circulation collection mechanism (9) is provided below the drain level (22), the circulation collection mechanism (9) comprising a water tank (91) installed at the bottom of the drying bin (1), a mud pump (92) installed between the water tank (91) and the powder washing pool (4), a negative pressure fan (93) installed on the inner side wall of the water tank (91), a waterproof cover (94) provided on the top surface of the input end of the negative pressure fan (93), aerators (95) provided on both sides of the inner bottom of the powder washing pool (4), and an output end of the negative pressure fan (93) connected to the aerator (95).

8. The high-efficiency drying device for powdered raw materials according to claim 4, characterized in that: The drying mechanism (5) further comprises a dehumidifying fan (54) arranged at the top of the drying chamber (1), wherein the dehumidifying fan (54) extracts and discharges air from the area above the hollow partition (52).

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