Crystallizer device for material drying

Abstract

The invention relates to the technical field of crystallizers, in particular to a crystallizer device for material drying, which comprises a crystallizer body, a conveying unit, a paving unit and a drying unit, the crystal material drying device can solve the following problems when crystal materials are dried in the prior art: when the crystals are conveyed, the crystals are easily accumulated, so that warm air cannot be blown into the crystals which are deeply accumulated, and the drying effect is influenced; wet crystals are easy to cling to a spiral conveying blade under the action of mother liquor, cannot quickly fall off and cannot be dried, so that the overall drying efficiency is further influenced; wet crystals are flattened and conveyed, so that the wet crystals can be heated and dried in a flattened state, and adverse effects such as drying difficulty caused by accumulation of the wet crystals are prevented; wet crystals can be subjected to multi-stage heating and drying treatment through hot air and reutilized re-drying hot airflow, so that the drying efficiency is improved, and re-drying can avoid the situation that the wet crystals are tightly attached to the surface of the conveying belt and are difficult to dry.

Description

Technical Field

[0001] This invention relates to the field of crystallizer technology, and in particular to a crystallizer apparatus for material drying. Background Technology

[0002] In the chemical, pharmaceutical, and food industries, materials typically require evaporation, crystallization, and drying processes. However, most traditional processes treat crystallization and drying as separate steps. The material first crystallizes in a crystallization vessel, then is discharged through a discharge valve, and finally the wet crystals are transferred to a dedicated drying unit via a conveying unit to dry the mother liquor on the surface of the wet crystals. As a result, the crystallized wet crystals tend to adhere to the inner wall of the conveying unit during the transfer process, which can easily lead to losses. Furthermore, the addition of the transfer process increases investment and operating costs.

[0003] With the development of technology, technicians in related fields have also made a lot of optimizations to crystallizers. In order to make a more accurate comparison, Chinese Patent No. CN119042988A discloses a continuous filtration and drying method and equipment for lithium hexafluorophosphate, which is similar to this application and is also used for drying crystalline materials. The prior art specifically includes an inclined screw conveyor, a screw conveyor blade rotatably connected in the screw conveyor, a number of evenly arranged screen holes on the screw conveyor blade, and a warm air blower installed at the top of the screw conveyor to blow hot air into the screw conveyor.

[0004] In the above-mentioned prior art, while the spiral conveyor blades rotate to transport the crystals, the sieve holes on them filter out the liquid in the crystals. At the same time, the warm air blows hot air into the spiral conveyor to dry the crystals, and the spiral conveyor blades drive the crystals to roll, thereby improving the filtration efficiency and drying effect.

[0005] However, the aforementioned existing technology has some shortcomings in the process of drying crystalline materials: 1. When conveying crystalline materials, the crystals tend to roll down to the downward-sloping side of the screw conveyor, causing them to accumulate. As a result, the warm air blown into the screw conveyor cannot reach the crystals deep in the accumulation, making it difficult for the crystals to dry quickly during the conveying process and affecting the drying effect.

[0006] 2. When wet crystals are discharged into the screw conveyor, they adhere tightly to the screw conveyor blades because the surface of the wet crystals is wet. The rotation of the screw conveyor blades cannot cause the wet crystals to fall off quickly, resulting in the wet crystals adhering to the surface of the screw conveyor blades not drying quickly. This not only further affects the overall drying efficiency but also the conveying efficiency.

[0007] Therefore, based on the above-stated viewpoints, there is still room for improvement in existing crystallizer devices. Summary of the Invention

[0008] To address the aforementioned problems, this invention provides a crystallizer apparatus for material drying, comprising: a crystallizer body for achieving material crystallization; a conveying unit for conveying the crystallized wet crystals to the next process, the conveying unit including a conveying box mounted on one side of the crystallizer body via a support, an inlet at one end of the conveying box located at the bottom of the crystallizer body's discharge cylinder, and a discharge outlet on the side away from the crystallizer body; a conveyor belt installed inside the conveying box for performing the conveying operation; a spreading unit, located inside the conveying box, for spreading and reciprocating the wet crystals on the upper end of the conveyor belt, facilitating uniform heating and efficient moisture removal during subsequent heating; and a drying unit, installed inside the conveying box, for heating and drying the wet crystals during the conveying process.

[0009] As a preferred embodiment of the present invention, the conveyor belt is inclined upward from the feeding end to the discharging end to lift the wet crystals upward during the conveying process. Multiple rotating shafts are rotatably installed on the inner wall of the conveyor box, and the conveyor belt is sleeved on the outer wall of the multiple rotating shafts. The inner wall of the conveyor box is also rotatably provided with multiple positioning shafts for limiting the bending points of the conveyor belt. A drive motor connected to any one of the rotating shafts is installed on the outer wall of the conveyor box through a motor base.

[0010] As a preferred embodiment of the present invention, the outer wall of the conveyor belt is symmetrically fitted with two limiting strips of the same outline, the surface of the conveyor belt is provided with multiple drainage holes between the two limiting strips, and the outer wall of the conveyor belt is uniformly provided with multiple protruding strips, which are parallel to the axis of the rotating shaft, and are used to divide the outer wall of the conveyor belt into multiple conveying areas. A water leakage hole is provided at the bottom of the side of the conveyor box near the feed end of the conveyor belt.

[0011] As a preferred embodiment of the present invention, the paving unit includes a smoothing plate installed on the top wall of the conveyor box via a bearing plate. The smoothing plate is located on the side above the feed end of the conveyor belt near the inclined section. The smoothing plate is in sliding contact with the raised strip at the upper end of the conveyor belt. A guide plate is installed on the side of the smoothing plate near the feed inlet. The upper end of the guide plate gradually tilts towards the side closer to the crystallizer body. Both the smoothing plate and the guide plate are located between two limiting bars.

[0012] As a preferred embodiment of the present invention, the guide plate is symmetrically provided with two vertical plates located above the limiting bars on the side near the feed inlet. A fixing plate is installed between the vertical plates and the inner wall of the conveying box. The two vertical plates are located on both sides of the crystal body discharge cylinder, and guide plates are provided at the bottom of the opposite sides of the two vertical plates. The guide plates are located between the two limiting bars.

[0013] As a preferred embodiment of the present invention, the paving unit further includes multiple linkage shafts rotatably mounted on the inner wall of the conveyor box. A cam is sleeved on the outer wall of the linkage shaft, and the cam rotates and abuts against the inner top wall of the conveyor belt. The multiple linkage shafts are connected to each other by belt drive, and one of the rotating shafts and one of the linkage shafts are connected by belt drive.

[0014] As a preferred embodiment of the present invention, an installation strip is provided at the lower end of the vertical plate, and a plurality of equally spaced top extension spring rods are installed at the lower end of the installation strip. Rollers that roll against the upper end of the limiting stop are installed at the lower end of the top extension spring rods.

[0015] As a preferred embodiment of the present invention, the drying unit includes a gas storage chamber installed on the upper end of the flat plate, a first heating rod is provided in the gas storage chamber, an air outlet is opened on the side of the gas storage chamber near the inclined section of the conveyor belt, an air guide bucket is installed on the outside of the air outlet, the side of the air guide bucket away from the gas storage chamber is inclined upward, and a first air pump is provided on the upper end of the conveyor box through a mounting bracket, the air inlet of the first air pump is connected to the outside, and the air outlet of the first air pump is connected to the gas storage chamber.

[0016] As a preferred technical solution of the present invention, the conveyor box further includes a secondary drying unit for secondary thermal drying of wet crystals at the upper end of the conveyor belt. The secondary drying unit includes a second air pump. Two second air pumps are symmetrically arranged on the outer wall of the conveyor box along the width direction. Two air collection ports are symmetrically opened on the upper end of the conveyor box near the discharge end of the conveyor belt. A second heating rod is provided on the inner wall of the air collection port. A sealing cover is provided at the upper end of the air collection port. The upper end of the sealing cover is connected to the air inlet of the second air pump. Both second air pumps have air pipes connected to their outlets. The two air pipes are connected to a re-drying chamber on opposite sides. The upper end of the re-drying chamber has multiple air holes.

[0017] As a preferred embodiment of the present invention, a guide plate is provided on the side of the gas collection port away from the inclined section of the conveyor belt. The lower end of the guide plate approaches the protruding strip at the upper end of the conveyor belt, and the lower half of the guide plate is inclined to the side away from the discharge end of the conveyor belt. A stabilizing plate is installed on the inner wall of the conveyor box. The stabilizing plate is hollowed out in the middle and a finned tube condenser is installed. The finned tube condenser has fins for condensing water vapor, condensing tubes, a collection tank for collecting condensate, and a water pipe for discharging condensate. The upper end and both sides of the stabilizing plate in the width direction are connected to the inner wall of the conveyor box, and the lower end of the stabilizing plate approaches the top of the conveyor belt.

[0018] In summary, this application includes the following beneficial technical effects: I. The present invention uses a V-shaped guide plate to squeeze the wet crystals in the middle of the conveyor belt to both sides, first evenly distributing the wet crystals along the width of the conveyor belt, and then flattening the wet crystals with a flat plate, thereby ensuring that the wet crystals can be heated and dried in a flat state, effectively preventing the accumulation of wet crystals and causing drying difficulties and other adverse effects.

[0019] Second, by controlling the up-and-down vibration of one side of the feed end of the conveyor belt, when the wet crystals fall onto the conveyor belt, the conveyor belt can vibrate and screen out the mother liquor carried in the wet crystals, thereby reducing the moisture content in the wet crystals and thus accelerating the subsequent heating and drying efficiency of the wet crystals.

[0020] Third, the present invention uses hot air delivered to the conveying box by the first air pump and hot air flow delivered to the conveying box by the second air pump to perform multi-stage heating and drying treatment on wet crystals, thereby improving the drying efficiency of wet crystals and ensuring the degree of dryness of the material after drying.

[0021] Fourth, the present invention can prioritize heating and drying the wet crystals that are in close contact with the conveyor belt through re-drying, avoiding the wet crystals from sticking to the surface of the conveyor belt and being difficult to dry under the action of the mother liquor, and can also prevent undried wet crystals from mixing into the material and affecting the use and storage of the material.

[0022] Fifth, this invention uses a support shaft to drive a flexible spiral plate to move circumferentially, which applies a pushing force to the wet crystals. Two adjacent flexible spiral plates push the wet crystals back and forth, thereby disrupting the arrangement of the wet crystals in the conveying area. This prevents the wet crystals from sticking tightly to the surface of the conveyor belt and making them difficult to dry. It ensures that the wet crystals are fully heated and dried during the conveying process, thereby improving the drying efficiency of the wet crystals and ensuring the dryness of the material after drying. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0026] Figure 3 This is a schematic diagram of the conveying unit of the present invention.

[0027] Figure 4 This is a schematic diagram of the structure between the paving unit and the drying unit of the present invention.

[0028] Figure 5 This is the present invention. Figure 4 A magnified view of part A.

[0029] Figure 6 This is a schematic diagram of the paving unit of the present invention.

[0030] Figure 7 This is the present invention. Figure 6 A magnified view of section B.

[0031] Figure 8 This is a schematic diagram of the structure of the re-drying unit of the present invention.

[0032] Figure 9 This is the present invention. Figure 8 A magnified view of a portion of point C.

[0033] Figure 10 This is the present invention. Figure 8 A magnified view of a portion of point D.

[0034] Figure 11 This is a schematic diagram of the structure between the support shaft and the flexible spiral baffle of the present invention.

[0035] In the diagram, 1. Crystallizer body; 2. Conveying unit; 21. Conveying box; 211. Support shaft; 212. Flexible spiral baffle; 22. Feed inlet; 23. Conveyor belt; 231. Limiting bar; 232. Drainage hole; 233. Raised bar; 24. Rotating shaft; 25. Positioning shaft; 26. Drive motor; 3. Paving unit; 31. Bearing plate; 32. Smoothing plate; 33. Guide plate; 34. Vertical plate; 341. Mounting strip; 342. 343. Top extension spring rod; 35. Roller; 36. Guide plate; 37. Linkage shaft; 38. Cam; 39. Cylinder; 40. Drying unit; 41. Gas storage chamber; 42. First heating rod; 43. Air guide hopper; 44. First air pump; 51. Re-drying unit; 52. Second air pump; 53. Second heating rod; 54. Sealing cover; 55. Air pipe; 56. Re-drying chamber; 57. Air vent; 58. Guide plate; 59. Stabilizing plate; 50. Finned tube condenser. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-11 The embodiments of the present invention will be described in detail below.

[0037] This application discloses a crystallizer device for material drying. It should be noted that the crystallizer device provided in this application is mainly used in the heating and drying process during the conveying of wet crystals. Technically, it enables the wet crystals to be evenly distributed on the upper end of the conveyor belt 23, ensuring that the wet crystals are heated and dried in a flat state, effectively preventing the accumulation of wet crystals and other adverse effects such as drying difficulties. In particular, during the conveying of wet crystals, vibration can be used to screen out the mother liquor carried in the crystals, thereby reducing the moisture content in the wet crystals and accelerating the subsequent heating and drying efficiency. Furthermore, the crystallizer device provided in this application can also perform multi-stage heating and drying of the wet crystals through the cooperation of hot air and reheating hot airflow, during which the wet crystals are reciprocated and moved, thereby improving the drying efficiency of the wet crystals and ensuring the degree of dryness of the material after drying.

[0038] Example 1: Reference Figure 1 and Figure 2 As shown, a crystallizer device for material drying includes a crystallizer body 1 for crystallizing materials; a conveying unit 2 for conveying the crystallized wet crystals to the next process; the conveying unit 2 includes a conveying box 21 mounted on one side of the crystallizer body 1 via a support; one end of the conveying box 21 has an inlet 22 located at the bottom of the discharge cylinder of the crystallizer body, and the other side away from the crystallizer body 1 has a discharge port; a conveyor belt 23 for performing conveying operations is installed inside the conveying box 21; a spreading unit 3 is located inside the conveying box 21 for spreading and reciprocating the wet crystals on the upper end of the conveyor belt 23 to facilitate uniform heating and efficient removal of moisture during subsequent heating; and a drying unit 4 is installed inside the conveying box 21 for heating and drying the wet crystals during the conveying process.

[0039] In the specific implementation process, the wet crystals that have been crystallized in the crystallizer body 1 are first discharged onto the conveyor belt 23 in the conveyor box 21. Then, the conveyor belt 23 transports the wet crystals to the next process. During this period, the drying unit 4 can discharge high-temperature hot air into the conveyor box 21 to heat and dry the wet crystals. The spreading unit 3 can spread and move the wet crystals on the upper end of the conveyor belt 23 to prevent the wet crystals from accumulating and the inside of the piled wet crystals from not being fully dried, thereby ensuring the degree of dryness of the material after drying.

[0040] Reference Figure 2 and Figure 3As shown, in order to ensure the efficiency of conveying wet crystals, in this embodiment, the conveyor belt 23 is inclined upward from the feed end to the discharge end, which is used to lift the wet crystals upward during the conveying process, which is conducive to the subsequent discharge into various collection containers. Multiple rotating shafts 24 are rotatably installed on the inner wall of the conveyor box 21, and the conveyor belt 23 is sleeved on the outer wall of the multiple rotating shafts 24. In addition, multiple positioning shafts 25 are rotatably provided on the inner wall of the conveyor box 21 for limiting the bending points of the conveyor belt 23. A drive motor 26 connected to any one of the rotating shafts 24 is installed on the outer wall of the conveyor box 21 through a motor base.

[0041] Furthermore, in this embodiment, two limiting strips 231 with the same outline are symmetrically fitted on the outer wall of the conveyor belt 23 to prevent wet crystals falling on the upper end of the conveyor belt 23 from falling to both sides of the conveyor belt 23. Multiple drainage holes 232 are formed on the surface of the conveyor belt 23 between the two limiting strips 231, and multiple raised strips 233 are evenly arranged on the outer wall of the conveyor belt 23. The raised strips 233 are parallel to the axis of the rotating shaft 24, used to divide the outer wall of the conveyor belt 23 into multiple conveying zones and to prevent the conveyor belt from carrying wet crystals. When the crystal is lifted upwards, the wet crystal rolls downwards due to the lack of restraint. A drainage hole is provided at the bottom of the side of the conveyor box 21 near the feed end of the conveyor belt 23. It should be noted that the limiting strip 231 is made of a flexible material that can undergo elastic deformation. Therefore, the limiting strip 231 can bend adaptively as the conveyor belt 23 moves. In addition, the diameter of the drain hole 232 is smaller than the diameter of the wet crystal. Therefore, when the wet crystal is conveyed, it will not cause the wet crystal to get stuck in the drain hole 232 or fall downwards through the drain hole 232.

[0042] In the specific implementation process, the drive motor 26 is started, and the drive motor 26 drives the conveyor belt 23 to rotate through the rotating shaft 24. When the wet crystals fall onto the upper end of the conveyor belt 23, the wet crystals are distributed in the conveying area between two adjacent limit bars 231 and two adjacent protrusion bars 233. Then the conveyor belt 23 conveys the wet crystals to the next process. During this period, the drainage holes 232 on the conveyor belt 23 can filter the wet crystals to remove the liquid on the surface of the wet crystals, so that the liquid passes through the water leakage hole of the conveyor box 21 and is discharged to the outside. Then the wet crystals are spread and dried by the drying unit 4 and the spreading unit 3. Finally, the conveyor belt 23 discharges the dried material through the discharge port.

[0043] Reference Figure 4 and Figure 6As shown, in order to ensure that the drying unit 4 can fully heat and dry the wet crystals on the upper end of the conveyor belt 23, it is necessary to spread the wet crystals on the upper end of the conveyor belt 23 to prevent accumulation. Based on this, a corresponding spreading unit 3 is provided in this embodiment. Specifically, the spreading unit 3 includes a smoothing plate 32 installed on the inner top wall of the conveyor box 21 via a bearing plate 31. The smoothing plate 32 is located on the side above the feed end of the conveyor belt 23 near the inclined section. The smoothing plate 32 slides in contact with the protruding strip 233 on the upper end of the conveyor belt 23. A guide plate 33 is installed on the side of the smoothing plate 32 near the feed inlet 22. The upper end of the guide plate 33 gradually tilts towards the side closer to the crystallizer body 1. The smoothing plate 32 and the guide plate 33 are both located between two limiting bars 231.

[0044] Furthermore, in this embodiment, two vertical plates 34 are symmetrically arranged on the side of the guide plate 33 near the feed inlet 22, which are respectively located above the limiting baffles 231. A fixing plate is installed between the vertical plates 34 and the inner wall of the conveying box 21. The two vertical plates 34 are respectively located on both sides of the crystal body discharge cylinder, and guide plates 35 are provided at the bottom of the opposite sides of the two vertical plates 34. The guide plates 35 are located between the two limiting baffles 231.

[0045] In the specific implementation process, when the wet crystals are discharged downwards through the discharge cylinder to the upper end of the conveyor belt 23, the vertical plate 34 and the guide plate 35 can limit the distribution range of the wet crystals, so that the wet crystals can only fall onto the conveyor belt 23. Then, the cooperation of the guide plate 33 and the smoothing plate 32 can smooth out the accumulated wet crystals, so that the wet crystals are evenly spread in the conveying area at the upper end of the conveyor belt 23, and the spreading thickness of the wet crystals is the thickness of the raised strip 233. It should be noted that the middle part of the guide plate 33 is inclined towards the side closer to the feed port 22. The guide plate 33 has a V-shaped cross-section. Since wet crystals cannot be distributed along the width of the conveyor belt 23 when they fall onto the upper part of the conveyor belt 23, they tend to accumulate in the middle area of ​​the conveyor belt 23. The V-shaped guide plate 33 can squeeze the wet crystals in the middle of the conveyor belt 23 to both sides, first distributing the wet crystals evenly along the width of the conveyor belt 23, and then flattening the wet crystals with the flattening plate 32. This ensures that the wet crystals can be heated and dried in a flattened state, effectively preventing the accumulation of wet crystals from causing drying difficulties and other adverse effects.

[0046] Reference Figure 6 and Figure 7As shown, since the wet crystal surface carries mother liquor, it increases the difficulty of heating and drying the wet crystal. Therefore, in this embodiment, the mother liquor on the surface of the wet crystal can be filtered out first. Specifically, the paving unit 3 also includes multiple linkage shafts 36 rotatably mounted on the inner wall of the conveyor box 21. The outer wall of the linkage shaft 36 is fitted with a cam 37. The cam 37 rotates and abuts against the inner top wall of the conveyor belt 23. The multiple linkage shafts 36 are connected to each other by belt drive. One of the rotating shafts 24 and one of the linkage shafts 36 are connected by belt drive. The diameter of the rotating shaft 24 is larger than the diameter of the linkage shaft 36. Therefore, when the rotating shaft 24 drives the linkage shaft 36 to rotate, the rotation speed of the linkage shaft 36 is greater than the rotation speed of the rotating shaft 24.

[0047] Furthermore, in this embodiment, an installation strip 341 is provided at the lower end of the vertical plate 34, and a plurality of equally spaced top extension spring rods 342 are installed at the lower end of the installation strip 341. Rollers 343 that roll against the upper end of the limiting stop bar 231 are installed at the lower end of the top extension spring rods 342. The top extension spring rods 342 always apply downward pressing force to the rollers 343, so that the rollers 343 always abut against the upper end of the limiting stop bar 231 and press the conveyor belt 23 downward.

[0048] In the specific implementation process, when the rotating shaft 24 drives the conveyor belt 23 to operate, the rotating shaft 24 drives the linkage shaft 36 to rotate rapidly, and the linkage shaft 36 drives the cam 37 to rotate synchronously. When the protruding part of the cam 37 contacts the inner top wall of the conveyor belt 23, the cam 37 pushes the upper half of the feed end side of the conveyor belt 23 upward. Then, the base circle part of the cam 37 contacts the inner top wall of the conveyor belt 23. The conveyor belt 23 will not be pushed and will quickly rebound downward under the action of the roller 343 and the extension spring rod 342, thereby realizing the up and down vibration of the feed end side of the conveyor belt 23. When the wet crystals fall onto the conveyor belt 23, the vibration of the conveyor belt 23 can screen out the mother liquor carried in the wet crystals, thereby reducing the moisture content in the wet crystals and thus accelerating the subsequent heating and drying efficiency of the wet crystals.

[0049] It should be further explained that the base circle portion and the protruding portion of the cam 37 are separate structures. Multiple cylinders 371 are evenly spaced along the axis inside the base circle portion of the cam 37. The telescopic ends of the cylinders 371 are connected to the protruding portion of the cam 37. During operation, the distance between the base circle portion and the protruding portion of the cam 37 is controlled by the cylinders 371, which increases or decreases the distance by which the protruding portion of the cam 37 pushes the conveyor belt 23 upwards. This adjusts the vibration amplitude of the conveyor belt 23. Different vibration amplitudes improve the adaptability to wet crystals with different characteristics (such as particle size, moisture content, and mother liquor viscosity), thereby fully removing the mother liquor from the surface of the wet crystals. Vibration also loosens the wet crystals accumulated on the conveyor belt 23, facilitating the rapid downward discharge of the mother liquor. Simultaneously, it allows subsequent hot air to penetrate more easily into the wet crystal layer, thus improving the efficiency of subsequent heating and drying of the wet crystals.

[0050] Reference Figure 4 and Figure 5 As shown, in order to ensure that the material remains dry when discharged, the wet crystals are heated and dried by the drying unit 4 in this embodiment during the conveying process. Specifically, the drying unit 4 includes a gas storage chamber 41 installed on the upper end of the flat plate 32. A first heating rod 42 is provided in the gas storage chamber 41. An air outlet is opened on the side of the gas storage chamber 41 near the inclined section of the conveyor belt 23. An air guide bucket 43 is installed on the outside of the air outlet. The side of the air guide bucket 43 away from the gas storage chamber 41 is inclined upward. A first air pump 44 is installed on the upper end of the conveyor box 21 through the mounting bracket. The air inlet of the first air pump 44 is connected to the outside, and the air outlet of the first air pump 44 is connected to the gas storage chamber 41.

[0051] In the specific implementation process, the first heating rod 42 and the first air pump 44 are started. The first air pump 44 blows air into the air storage chamber 41. After being heated by the first heating rod 42, hot air is formed. Then, the hot air in the air storage chamber 41 is discharged into the conveyor box 21 through the air guide hopper 43. The hot air floats along the upper end of the conveyor belt 23 towards the discharge end. During this period, the wet crystals on the upper end of the conveyor belt 23 are heated and dried by the hot air.

[0052] Reference Figure 8 , Figure 9 and Figure 10As shown, during the process of heating and drying the wet crystals with hot air in the conveyor box 21, water vapor will be generated. If the water vapor remains in the conveyor box 21, the humidity will be too high, which will affect the drying effect of the wet crystals. In order to improve the drying effect of the wet crystals, in this embodiment, the conveyor box 21 also includes a secondary drying unit 5 for secondary thermal drying of the wet crystals at the upper end of the conveyor belt 23. Specifically, the secondary drying unit 5 includes a second air pump 51. Two second air pumps 51 are symmetrically arranged on the outer wall of the conveyor box 21 along the width direction. Two air collection ports are symmetrically opened on the upper end of the conveyor box 21 near the discharge end of the conveyor belt 23. The inner wall of the air collection port is provided with a second heating rod 52. A sealing cover 53 is provided at the upper end of the air collection port. The upper end of the sealing cover 53 is connected to the air inlet end of the second air pump 51. The air outlet ends of the two second air pumps 51 are connected to air pipes 54. The opposite sides of the two air pipes 54 are provided with a secondary drying chamber 55 connected to them. Multiple air holes 56 are opened at the upper end of the secondary drying chamber 55.

[0053] Furthermore, in this embodiment, a guide plate 57 is provided on the side of the air collection port away from the inclined section of the conveyor belt 23. The lower end of the guide plate 57 approaches the protrusion 233 at the upper end of the conveyor belt 23, and the lower half of the guide plate 57 is inclined away from the discharge end of the conveyor belt 23. A stabilizing plate 58 is installed on the inner wall of the conveyor box 21. The middle part of the stabilizing plate 58 is hollowed out and a finned tube condenser 59 is installed. The finned tube condenser 59 has fins for condensing water vapor, condensing tubes, a collection tank for collecting condensate, and a water pipe for discharging condensate. The upper end and both sides of the stabilizing plate 58 are connected to the inner wall of the conveyor box 21. The lower end of the stabilizing plate 58 approaches the top of the conveyor belt 23, thereby ensuring that the air inside the conveyor box 21 can only pass through the finned tube condenser 59.

[0054] In the specific implementation process, when the finned tube condenser 59 is started, the hot air in the conveying box 21 floats to the discharge end side and first passes through the finned tube condenser 59. The fins in the finned tube condenser 59 absorb the water vapor in the hot air. After the water vapor comes into contact with the fins, it condenses into water droplets and drips into the collection tank of the finned tube condenser 59. Finally, it is discharged through the water pipe, which can dehumidify in time and ensure that the inside of the conveying box 21 is always kept dry, which is conducive to heating and drying the wet crystals.

[0055] The dehumidified hot air passes through the air collection port under the guidance of the baffle plate 57 (in... Figure 9(As shown in the diagram), at this time, the second air pump 51 and the second heating rod 52 are started. The second heating rod 52 heats the airflow passing through the air collection port. Then, the second air pump 51 transports the reheated hot airflow through the air pipe 54 to the re-drying chamber 55. The hot airflow passes through the air hole 56 and is discharged upwards. This allows the hot airflow to pass through the drain hole 232 of the conveyor belt 23 and perform secondary heating and drying on the wet crystals at its upper end. In this way, the hot air in the conveyor box 21 and the hot airflow of the re-drying can perform multi-stage heating and drying treatment on the wet crystals, thereby improving the drying efficiency of the wet crystals and ensuring the dryness of the material after drying. In addition, the re-drying can prioritize the heating and drying of the wet crystals that are close to the conveyor belt 23, avoiding the wet crystals from sticking to the surface of the conveyor belt 23 and being difficult to dry under the action of the mother liquor. It can also prevent undried wet crystals from mixing into the material and affecting the use and storage of the material.

[0056] Example 2: Reference Figure 11 As shown, based on Embodiment 1, in order to further improve the ability of wet crystals to be fully heated and dried, the wet crystals can be reciprocated while being transported in this embodiment. Specifically, multiple support shafts 211 parallel to the axis of the rotating shaft 24 are rotatably installed on the inner wall of the conveyor box 21. The multiple support shafts 211 are all located above the inclined section of the conveyor belt 23, and the multiple support shafts 211 are connected to each other by belt drive. One of the rotating shafts 24 and one of the support shafts 211 are connected by belt drive.

[0057] Furthermore, in this embodiment, multiple flexible spiral baffles 212 are installed at equal intervals along the axial direction on the outer wall of the support shaft 211. The flexible spiral baffles 212 can undergo elastic deformation under the action of external force and automatically reset when no external force is applied. The flexible spiral baffles 212 approach the upper end of the conveyor belt 23, and the distance between the flexible spiral baffles 212 and the conveyor belt 23 is less than the thickness of the protrusion strip 233. Therefore, when the conveyor belt 23 drives the protrusion strip 233 past the support shaft 211, the flexible spiral baffles 212 will be squeezed and undergo elastic deformation.

[0058] It should be noted that the two adjacent flexible spiral plates 212 rotate in opposite directions. Therefore, when the support shaft 211 rotates, the flexible spiral plates 212 with opposite rotation directions exert opposite directions of the pushing force on the wet crystal at the upper end of the conveyor belt 23.

[0059] In the specific implementation process, during the conveyor belt 23 conveying wet crystals, the rotating shaft 24 drives the support shaft 211 to rotate synchronously. The support shaft 211 drives the flexible spiral baffle 212 to move circumferentially. When the flexible spiral baffle 212 comes into contact with the wet crystals at the upper end of the conveyor belt 23, it will apply a pushing force to the wet crystals. The two adjacent flexible spiral baffles 212 can push the wet crystals back and forth, thereby disrupting the arrangement order of the wet crystals in the conveying area. This will push the wet crystals at the bottom to the top to be heated and dried, preventing the wet crystals from sticking tightly to the surface of the conveyor belt 23 and making it difficult to be heated and dried. In addition, the hot air and re-drying hot airflow inside the conveyor box 21 can ensure that the wet crystals are fully heated and dried during the conveying process, thereby improving the drying efficiency of the wet crystals and ensuring the dryness of the material after drying.

[0060] It should be noted that since the conveying zone is fully loaded with wet crystals, when the flexible spiral plate 212 moves circumferentially and moves the wet crystals, it is easy to push the wet crystals out of the conveying zone, causing the wet crystals to fall downwards along the inclined direction of the conveyor belt 23. This not only moves the wet crystals back and forth, but also reduces the thickness of the wet crystals in the conveying zone, further improving the drying efficiency.

[0061] During operation: First step: First, the wet crystals that have been crystallized in the crystallizer body 1 are discharged onto the conveyor belt 23 in the conveyor box 21. Then, the drive motor 26 is started. The drive motor 26 drives the conveyor belt 23 to rotate through the rotating shaft 24, so that the conveyor belt 23 transports the wet crystals to the next process. During this period, the mother liquor carried on the surface of the wet crystals can be filtered out through the drain hole 232 on the conveyor belt 23, so that the mother liquor is discharged to the outside after passing through the drain hole of the conveyor box 21. In addition, the accumulated wet crystals can be smoothed out by the cooperation of the guide plate 33 and the smoothing plate 32, so that the wet crystals are evenly spread in the conveying area at the upper end of the conveyor belt 23.

[0062] Step 2: When the rotating shaft 24 drives the conveyor belt 23 to rotate, the rotating shaft 24 drives the linkage shaft 36 to rotate rapidly. The linkage shaft 36 drives the cam 37 to rotate synchronously. The cam 37 can push the upper half of the feed end side of the conveyor belt 23 upward. Then, under the action of the roller 343 and the extension spring rod 342, the conveyor belt 23 quickly rebounds downward, thereby realizing the up and down vibration of the feed end side of the conveyor belt 23, which is used to screen out the mother liquor carried in the wet crystals, thereby reducing the moisture content in the wet crystals and thus accelerating the subsequent heating and drying efficiency of the wet crystals.

[0063] Step 3: Start the first heating rod 42 and the first air pump 44. The first air pump 44 blows air into the air storage chamber 41. After being heated by the first heating rod 42, it forms hot air. Then, the hot air in the air storage chamber 41 is discharged into the conveyor box 21 through the air guide hopper 43. The hot air floats along the upper end of the conveyor belt 23 towards the discharge end. During this period, the wet crystals on the upper end of the conveyor belt 23 are heated and dried by the hot air.

[0064] Step 4: When the hot air in the conveyor box 21 floats towards the discharge end, it first passes through the finned tube condenser 59. The finned tube condenser 59 removes water vapor from the hot air, ensuring that the inside of the conveyor box 21 remains dry. The dehumidified hot air passes through the air collection port under the guidance of the guide plate 57. At this time, the second air pump 51 and the second heating rod 52 are started. The second heating rod 52 heats the airflow passing through the air collection port. Then, the second air pump 51 delivers the reheated hot airflow through the air pipe 54 to the re-drying chamber 55. The hot airflow passes through the air hole 56 and is discharged upwards, so that the hot airflow passes through the drain hole 232 of the conveyor belt 23 and performs secondary heating and drying on the wet crystals at the upper end. In this way, the hot air in the conveyor box 21 and the re-drying hot airflow can perform multi-stage heating and drying treatment on the wet crystals.

[0065] Step 5: During the conveyor belt 23's transport of wet crystals, the rotating shaft 24 drives the support shaft 211 to rotate synchronously. The support shaft 211 drives the flexible spiral baffle 212 to move circumferentially. When the flexible spiral baffle 212 comes into contact with the wet crystals at the upper end of the conveyor belt 23, it applies a pushing force to the wet crystals. The two adjacent flexible spiral baffles 212 push the wet crystals back and forth, thereby disrupting the arrangement order of the wet crystals in the transport area and ensuring that the wet crystals are fully heated and dried during the transport process. Finally, the conveyor belt 23 discharges the dried material through the discharge port, and it is then received by a special container.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A crystallizer apparatus for drying of material, characterized in that, The utility model relates to a crystallizer body (1) for realizing the crystallization of material, a conveying unit (2) for conveying the wet crystal after crystallization to the next process, the conveying unit (2) comprising a conveying box (21) arranged on one side of the crystallizer body (1) through a support, the conveying box (21) being provided with an inlet (22) at one end and a discharge port on the side away from the crystallizer body (1), the inlet being located at the bottom of the crystallizer body discharge cylinder, and a conveying belt (23) being installed inside the conveying box (21) for performing the conveying operation, a spreading unit (3) being arranged inside the conveying box (21) for spreading and reciprocating the wet crystal on the upper end of the conveying belt (23) to facilitate uniform heating and water vapor removal efficiency during subsequent heating, and a drying unit (4) being installed inside the conveying box (21) for heating and drying the wet crystal during the conveying process. The conveying belt (23) is inclined upward from the inlet end to the discharge end for lifting the wet crystal during the conveying process, a plurality of rotating shafts (24) are rotatably installed on the inner wall of the conveying box (21), the conveying belt (23) is sleeved on the outer wall of the rotating shafts (24), and a plurality of positioning shafts (25) for limiting the bending parts of the conveying belt (23) are rotatably arranged on the inner wall of the conveying box (21), and a drive motor (26) connected with any one of the rotating shafts (24) is installed on the outer side wall of the conveying box (21) through a motor base. The outer wall of the conveying belt (23) is symmetrically sleeved with two limiting baffle strips (231) having the same contour, a plurality of drainage holes (232) are formed between the two limiting baffle strips (231) on the surface of the conveying belt (23), and a plurality of protruding strips (233) are uniformly arranged on the outer wall of the conveying belt (23), the protruding strips (233) being parallel to the axis of the rotating shafts (24) for dividing the outer wall of the conveying belt (23) into a plurality of conveying zones, and a water leakage hole is formed in the bottom of the side of the conveying box (21) close to the inlet end of the conveying belt (23). The spreading unit (3) comprises a smoothing plate (32) installed on the inner top wall of the conveying box (21) through a bearing plate (31), the smoothing plate (32) being located above the inlet end of the conveying belt (23) on the side close to the inclined section, the smoothing plate (32) being in sliding contact with the protruding strips (233) on the upper end of the conveying belt (23), and a guide plate (33) being installed on the side of the smoothing plate (32) close to the inlet (22), the upper end of the guide plate (33) gradually inclining toward the side close to the crystallizer body (1), and the smoothing plate (32) and the guide plate (33) being located between the two limiting baffle strips (231). The guide plate (33) is symmetrically provided with two vertical plates (34) located above the limiting baffle strips (231) on the side close to the inlet (22), a fixed plate being installed between the vertical plates (34) and the inner wall of the conveying box (21), the two vertical plates (34) being located on the two sides of the crystallizer body discharge cylinder, and guide plates (35) being arranged on the opposite side bottoms of the two vertical plates (34), the guide plates (35) being located between the two limiting baffle strips (231).

2. A crystallizer apparatus for drying a material according to claim 1, characterized in that: ​ 3. A crystallizer apparatus for drying material according to claim 1, characterized in that: ​ 4. A crystalliser apparatus for drying a material according to claim 3, wherein: ​ 5. A crystalliser apparatus for drying a material according to claim 4, wherein: ​ 6. A crystalliser apparatus for drying a material according to claim 5 wherein: The paving unit (3) further comprises a plurality of linkage shafts (36) rotatably installed on the inner wall of the conveying box (21), the outer wall of the linkage shaft (36) is sleeved with a cam (37), the cam (37) is in rotational contact with the inner top wall of the conveying belt (23), and the plurality of linkage shafts (36) are connected through belt transmission.

7. A crystallizer apparatus for drying material as defined in claim 5, wherein: The lower end of the vertical plate (34) is provided with a mounting strip (341), a plurality of equally spaced top spring rods (342) are mounted on the lower end of the mounting strip (341), and the lower end of the top spring rod (342) is provided with a roller (343) which is in rolling contact with the upper end of the limiting baffle (231).

8. A crystallizer apparatus for drying material according to claim 1, characterized in that: The drying unit (4) comprises a gas storage chamber (41) mounted on the upper end of the smoothing plate (32), a first heating rod (42) is arranged in the gas storage chamber (41), a gas outlet is formed on one side of the gas storage chamber (41) close to the inclined section of the conveying belt (23), a gas guide hopper (43) is mounted outside the gas outlet, the side of the gas guide hopper (43) away from the gas storage chamber (41) is inclined upward, and a first gas pump (44) is arranged on the upper end of the conveying box (21) through a mounting frame, the gas inlet end of the first gas pump (44) is connected with the outside, and the gas outlet end of the first gas pump (44) is connected with the gas storage chamber (41).

9. A crystallizer apparatus for drying material according to claim 1, characterized in that: The conveying box (21) further comprises a re-drying unit (5) for secondary heat drying of the wet crystal on the upper end of the conveying belt (23), the re-drying unit (5) comprises a second gas pump (51), two second gas pumps (51) are symmetrically arranged on the outer wall of the conveying box (21) along the width direction, two gas inlets are symmetrically formed on the upper end of the conveying box (21) close to the discharge end of the conveying belt (23), a second heating rod (52) is arranged on the inner wall of the gas inlet, a sealing cover (53) is arranged on the upper end of the gas inlet, and the upper end of the sealing cover (53) is connected with the gas inlet end of the second gas pump (51); The gas outlet ends of the two second gas pumps (51) are connected with gas pipes (54), and the opposite sides of the two gas pipes (54) are jointly provided with a re-drying cavity (55) connected therewith, and a plurality of air holes (56) are formed in the upper end of the re-drying cavity (55).

10. A crystalliser apparatus for drying a material according to claim 9, wherein: A flow guide plate (57) is arranged on the side of the gas inlet away from the inclined section of the conveying belt (23), the lower end of the flow guide plate (57) is close to the protruding strip (233) on the upper end of the conveying belt (23), and the lower half of the flow guide plate (57) is inclined to the side away from the discharge end of the conveying belt (23). A stabilizing plate (58) is mounted on the inner wall of the conveying box (21), the middle part of the stabilizing plate (58) is hollow and provided with a finned tube condenser (59), the finned tube condenser (59) has fins for condensing water vapor, a condensing pipe, a collection tank for collecting condensed water, and a water pipe for discharging condensed water, the upper end and the width direction sides of the stabilizing plate (58) are connected with the inner wall of the conveying box (21), and the lower end of the stabilizing plate (58) is close to the top of the conveying belt (23).

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