A drying system of N-maleimide polymer and a drying process thereof

Abstract

The application discloses a kind of N-maleimide polymer drying system, including drying tower, the top of the drying tower is equipped with feed hopper, the bottom of the drying tower is equipped with discharge port, drying tower is also equipped with hot gas inlet pipe near bottom end position, the top of the drying tower is equipped with hot gas discharge pipe, the bottom of the feed hopper extends to the inside of the drying tower and is connected with feed inclined pipe by swivel joint, the inside of the drying tower is equipped with material retardation mechanism.In the application, the material enters the inside of the drying tower through the feed hopper, falls to the retardation disc, and is slowly sprinkled through the material falling opening formed on the retardation disc, and is sprinkled layer by layer downward, hot air enters through the hot gas inlet pipe and is discharged from the hot gas discharge pipe, forming a hot flow from bottom to top in the inside of the drying tower, thereby drying the sprinkled material, and the finally completed material is gathered at the bottom of the drying tower, and then can be discharged through the discharge port, with high drying efficiency and good drying effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of N-maleimide polymer production, in particular to a drying system and drying process for N-maleimide polymer. BACKGROUND

[0002] The production process of N-phenyl maleimide polymer (SMIA) uses N-phenyl maleimide, styrene and acrylonitrile as raw materials, adopts suspension system and azobisdimethylvaleronitrile as initiator to generate polymerization reaction at a certain temperature to generate N-phenyl maleimide polymer. The production process includes styrene washing, reaction, solid-liquid separation and drying and other procedures.

[0003] The production process includes the following steps: styrene washing, polymerization reaction, solid-liquid separation and drying and packaging.

[0004] In the drying process, the polymer crystals with high water content obtained after centrifugation by the centrifuge need to be dried before packaging and sale. The drying device in the prior art has the problem of low drying efficiency. The material is mainly conveyed into the drying device by the conveying belt and dried by heating. The material cannot be uniformly heated and dried in the drying device, resulting in poor drying effect and long drying time. SUMMARY

[0005] In order to solve the problems mentioned in the background, the present application provides a drying system and drying process for N-maleimide polymer.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] A drying system for N-maleimide polymer, comprising a drying tower, a feed hopper is arranged at the top end of the drying tower, a discharge port is arranged at the bottom end of the drying tower, a hot gas inlet pipe is arranged near the bottom end of the drying tower, a hot gas discharge pipe is arranged at the top end of the drying tower, a feed inclined pipe is connected to the inside of the drying tower through a rotary joint at the bottom end of the feed hopper, a material retarding mechanism is arranged in the inside of the drying tower, the material retarding mechanism comprises a retarding disc, the retarding disc is a conical structure, and a plurality of long strip-shaped material falling openings are arranged on the retarding disc.

[0008] Preferably, a disc is rotatably installed on the top end of the retarding disc through a support rod, a tooth ring and a connecting frame are fixed on the top end of the disc, and the connecting frame is fixed with the feed inclined pipe.

[0009] Preferably, a plurality of first scrapers are arranged above the retardation disc, the top end of the first scrapers is movably extended to the top of the disc and is fixed with a lifting ring, a threaded sleeve is fixed on the lifting ring, a reciprocating screw rod is rotatably arranged at the top center of the disc, the threaded sleeve is threadedly arranged on the outer portion of the reciprocating screw rod, and a first gear is fixed at the top end of the reciprocating screw rod.

[0010] Preferably, an incomplete gear is arranged between the gear ring and the first gear, the gear ring and the first gear are engaged with the incomplete gear, and are not engaged at the same time.

[0011] Preferably, a double-shaft rotating motor is fixed on one side of the feeding hopper, one output shaft of the double-shaft rotating motor is fixed with the incomplete gear, and the other output shaft of the double-shaft rotating motor is fixed with a first rotating shaft, the first rotating shaft is extended into the feeding hopper and is fixed with a second gear.

[0012] Preferably, a vertically arranged second rotating shaft is rotatably arranged in the feeding hopper through a fixing frame, a third gear is fixed at the top end of the second rotating shaft, the second gear is engaged with the third gear, and a plurality of second scrapers are fixed on the outer side of the second rotating shaft.

[0013] Preferably, the bottom end of the second rotating shaft is extended into the drying tower and is fixed with a dredging rod.

[0014] Preferably, a plurality of groups of the material retardation mechanism are arranged, and the groups of the material retardation mechanism are equally distributed from top to bottom in the drying tower, the incomplete gear in the lower material retardation mechanism is rotatably connected to the bottom end of the upper retardation disc, a single-shaft rotating motor is fixed on the outer wall of the drying tower, the output shaft of the single-shaft rotating motor is extended into the drying tower and is fixed with a first bevel gear, a second bevel gear is fixed on the rotating shaft of the incomplete gear, and the first bevel gear is engaged with the second bevel gear.

[0015] Preferably, a distribution coil pipe is connected to one end of the hot gas inlet pipe inside the drying tower, a plurality of gas distribution ports are equally distributed on the distribution coil pipe, and a barrier net is arranged in the gas distribution port.

[0016] A drying process of N-maleimide polymer, comprising the following steps:

[0017] S1: The N-phenylmaleimide polymer after centrifugation is conveyed to the feed hopper at a speed of 1 kg / min by an elevator. At this time, the material is a granular crystal containing a small amount of moisture. It enters the interior of the drying tower through the feed hopper and falls onto the slow plate. It is slowly sprinkled down through the discharge opening on the slow plate, and then sprinkled down layer by layer. Hot air enters through the hot air inlet pipe at a gas flow rate of 3-4 L / min and is discharged from the hot air outlet pipe, maintaining the internal temperature of the drying tower between 50-60℃. A hot air flow is formed from bottom to top inside the drying tower, thereby drying the sprinkled material. The final material accumulates at the bottom of the drying tower and can then be discharged through the discharge port.

[0018] S2: During the feeding process, the feed slant tube rotates continuously, ensuring that the material can be evenly sprinkled on the top of the slowing disc, which can improve the dispersion of the material and thus improve the drying effect of the material.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. After centrifugation, the N-phenylmaleimide polymer is conveyed to the feed hopper by an elevator. At this time, the material is a granular crystal containing a small amount of moisture. It enters the interior of the drying tower through the feed hopper and falls onto the slow plate. It is slowly sprinkled down through the discharge opening on the slow plate, and then sprinkled down layer by layer. Hot air enters through the hot air inlet pipe and exits through the hot air outlet pipe, forming a hot air flow from bottom to top inside the drying tower, thereby drying the sprinkled material. Finally, the finished material accumulates at the bottom of the drying tower and can then be discharged through the discharge port. It has high drying efficiency and good drying effect.

[0021] 2. When the gear ring rotates, it drives the disc and connecting frame to rotate, which in turn drives the feed slant tube to rotate. During the feeding process, the feed slant tube rotates continuously, ensuring that the material can be evenly sprinkled on the top of the slowing disc, which can improve the dispersion of the material and thus improve the drying effect of the material;

[0022] 3. When the disc rotates, it drives the first scraper to rotate as well, thereby scraping the material at the top of the slowing disc, allowing the material to move towards the discharge opening, thus accelerating the material's fall from the discharge opening and ensuring that the material at the top of the slowing disc can completely fall from the discharge opening;

[0023] 4. When the reciprocating screw rotates, it can drive the lifting ring to move up and down through the threaded sleeve, thereby driving the first scraper to move up and down. When the first scraper moves to be aligned with the discharge opening, it can be inserted into the discharge opening to clear the discharge opening and prevent the material from blocking the discharge opening and preventing it from falling further.

[0024] 5. When the incomplete gear meshes with the gear ring, it can drive the gear ring to rotate at an angle, which is exactly the included angle formed between two adjacent material discharge openings (or an integer multiple of this included angle). This ensures that the first scraper is aligned with the material discharge opening each time the gear ring stops, thus achieving material scraping guidance. When the incomplete gear meshes with the first gear, it can drive the reciprocating screw to rotate, thereby driving the first scraper to clear the material discharge opening. Each time, the first scraper can move up and down once or multiple times, thus achieving a continuous scraping-clearing-scraping-clearing effect, and there is no interference between the two actions.

[0025] 6. The dual-shaft rotary motor can drive the second gear to rotate, and through meshing, drive the third gear to rotate, which in turn drives the second shaft to rotate, driving the second scraper to agitate the material, increasing the material's fluidity and thus increasing the feeding speed. Furthermore, it will drive the unblocking rod to rotate, achieving the effect of unblocking the lower part of the feed hopper, further accelerating the material's entry into the drying tower. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a perspective view of the drying tower of the present invention;

[0028] Figure 2 This is a front view of the drying tower of the present invention;

[0029] Figure 3 This is a front-view sectional view of the drying tower of the present invention;

[0030] Figure 4 for Figure 3 Enlarged detail image of position A in the middle;

[0031] Figure 5 This is an enlarged detail view of the material retardation mechanism of the present invention;

[0032] Figure 6 for Figure 5 Enlarged detail image of position B in the middle;

[0033] Figure 7 This is a top-view perspective view of the material slowing mechanism of the present invention;

[0034] Figure 8 This is a front-view sectional view of the material slowing mechanism of the present invention;

[0035] Figure 9 Enlarged sectional view of the feed hopper of the present application;

[0036] Figure 10 Enlarged detail view of the distribution coil of the present application;

[0037] In the figure: 1 drying tower, 101 discharge port, 102 hot gas inlet pipe, 103 hot gas discharge pipe, 104 distribution coil, 105 gas distribution port, 106 barrier net, 2 feed hopper, 201 fixed frame, 202 second rotating shaft, 203 third gear, 204 dredging rod, 205 second scraper, 206 rotary joint, 207 feed inclined pipe, 3 double-shaft rotating motor, 301 first rotating shaft, 302 second gear, 303 incomplete gear, 4 speed reduction disc, 401 material dropping opening, 402 support rod, 5 disc, 501 connecting frame, 502 gear ring, 503 reciprocating screw rod, 504 first gear, 505 first scraper, 506 lifting ring, 6 single-shaft rotating motor, 601 first bevel gear, 602 second bevel gear. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0039] Embodiment 1

[0040] Reference Figures 1-10 A drying system for N-maleimide polymer, comprising a drying tower 1, a feed hopper 2 arranged at the top end of the drying tower 1, a discharge port 101 arranged at the bottom end of the drying tower 1, a hot gas inlet pipe 102 arranged close to the bottom end of the drying tower 1, a hot gas discharge pipe 103 arranged at the top end of the drying tower 1, a feed inclined pipe 207 connected to the inside of the drying tower 1 through a rotary joint 206 at the bottom end of the feed hopper 2, a material speed reduction mechanism arranged in the inside of the drying tower 1, the material speed reduction mechanism comprising a speed reduction disc 4, the speed reduction disc 4 being a conical structure, and a plurality of long-strip-shaped material dropping openings 401 arranged on the speed reduction disc 4.

[0041] The N-phenylmaleimide polymer after centrifugation is conveyed into the feeding hopper 2 by the elevator, and the material at this time is a granular crystal containing a small amount of moisture, which enters the inside of the drying tower 1 through the feeding hopper 2, falls onto the retardation disc 4, and is slowly sprinkled through the material falling opening 401 formed on the retardation disc 4, and falls layer by layer downward, hot air enters through the hot gas inlet pipe 102 and is discharged from the hot gas discharge pipe 103, forming a hot flow from bottom to top in the inside of the drying tower 1, thereby drying the sprinkled material, and finally the completed material is collected at the bottom of the drying tower 1, and then can be discharged through the discharge port 101.

[0042] Embodiment 2

[0043] With reference to Figures 1-10 The difference between this embodiment and embodiment 1 is that the top end of the retardation disc 4 is rotatably installed with a disc 5 through a support rod 402, the top end of the disc 5 is fixed with a gear ring 502 and a connecting frame 501, and the connecting frame 501 is fixed with the feeding inclined pipe 207.

[0044] When the gear ring 502 rotates, it can drive the disc 5 and the connecting frame 501 to rotate, and in turn drive the feeding inclined pipe 207 to rotate, so that the feeding inclined pipe 207 continuously rotates during the feeding process, thereby ensuring that the material can be uniformly sprinkled on the top end of the retardation disc 4, improving the dispersity of the material, and thereby improving the drying effect of the material.

[0045] Embodiment 3

[0046] With reference to Figures 1-10 The difference between this embodiment and embodiment 2 is that a plurality of first scrapers 505 are arranged above the retardation disc 4, the top end of the first scraper 505 extends to the top of the disc 5 and is fixed with a lifting circular ring 506, the lifting circular ring 506 is fixed with a threaded sleeve, the top end of the disc 5 is rotatably installed with a reciprocating screw rod 503, the threaded sleeve is threadedly installed on the outside of the reciprocating screw rod 503, and the top end of the reciprocating screw rod 503 is fixed with a first gear 504.

[0047] When the disc 5 rotates, it can drive the first scraper 505 to rotate, thereby scraping the material on the top end of the retardation disc 4, so that the material can move towards the material falling opening 401, thereby accelerating the falling of the material from the material falling opening 401, and ensuring that the material on the top end of the retardation disc 4 can completely fall from the material falling opening 401.

[0048] When the reciprocating screw rod 503 rotates, it can drive the lifting circular ring 506 to move up and down through the threaded sleeve, thereby driving the first scraper 505 to move up and down, and when the first scraper 505 moves to align with the material falling opening 401, it can be inserted into the material falling opening 401 to dredge the material falling opening 401, thereby preventing the material from blocking the material falling opening 401 and continuing to fall.

[0049] Wherein, the gear ring 502 and the first gear 504 are provided with an incomplete gear 303, the gear ring 502 and the first gear 504 are engaged with the incomplete gear 303, and are not engaged at the same time;

[0050] When the incomplete gear 303 is engaged with the gear ring 502, it can drive the gear ring 502 to rotate an angle, which is exactly the included angle between two adjacent blanking openings 401 (or an integer multiple of the included angle), so as to ensure that the first scraper 505 can be aligned with the blanking opening 401 every time the gear ring 502 stops, so as to achieve material scraping and guiding, when the incomplete gear 303 is engaged with the first gear 504, it can drive the reciprocating screw rod 503 to rotate, thereby driving the first scraper 505 to dredge the blanking opening 401, and the first scraper 505 can be lifted and moved once or multiple times every time, so as to achieve the effect of continuous scraping-dredging-scraping-dredging, and there is no interference between the two actions.

[0051] Embodiment 4

[0052] Referring to Figures 1-10 The difference between this embodiment and embodiment 3 is that the feeding hopper 2 is fixed on one side of the double-shaft rotating motor 3, one of the output shafts of the double-shaft rotating motor 3 is fixed with the incomplete gear 303, and the other output shaft of the double-shaft rotating motor 3 is fixed with the first rotating shaft 301, which extends into the feeding hopper 2 and is fixed with the second gear 302.

[0053] Wherein, the vertical second rotating shaft 202 is rotatably installed in the feeding hopper 2 by the fixed frame 201, the top end of the second rotating shaft 202 is fixed with the third gear 203, the second gear 302 is engaged with the third gear 203, and the outer side of the second rotating shaft 202 is fixed with a plurality of second scrapers 205.

[0054] Wherein, the bottom end of the second rotating shaft 202 extends into the inside of the drying tower 1 and is fixed with a dredging rod 204;

[0055] The double-shaft rotating motor 3 can drive the second gear 302 to rotate, and drive the third gear 203 to rotate through engagement, thereby driving the second rotating shaft 202 to rotate, driving the second scraper 205 to stir the material, increasing the flowability of the material, thereby increasing the discharging speed, further, the dredging rod 204 is driven to rotate, achieving the effect of dredging the lower part of the feeding hopper 2, and further accelerating the material into the drying tower 1.

[0056] Embodiment 5

[0057] Referring to Figures 1-10The difference between the embodiment and the embodiment- is that the material retarding mechanism is provided with multiple groups, and the multiple groups of material retarding mechanisms are equidistantly distributed from top to bottom in the drying tower 1, the incomplete gear 303 in the lower material retarding mechanism is rotationally connected to the bottom end of the upper retarding disc 4, the single-shaft rotating motor 6 is fixed on the outer wall of the drying tower 1, the output shaft of the single-shaft rotating motor 6 extends to the inside of the drying tower 1 and is fixed with the first bevel gear 601, the rotating shaft of the incomplete gear 303 is fixed with the second bevel gear 602, and the first bevel gear 601 is engaged with the second bevel gear 602;

[0058] The single-shaft rotating motor 6 can drive the first bevel gear 601 to rotate, and then drive the incomplete gear 303 to rotate through the engagement of the first bevel gear 601 and the second bevel gear 602, and transmit power to the material retarding mechanism.

[0059] The end of the hot gas inlet pipe 102 inside the drying tower 1 is connected with a distribution coil 104, a plurality of gas distribution ports 105 are equidistantly distributed on the distribution coil 104, and a blocking net 106 is installed in the gas distribution port 105.

[0060] The blocking net 106 can block the material from entering the distribution coil 104, and the gas distribution ports 105 distributed on the distribution coil 104 can uniformly distribute the entering hot air, thereby improving the drying effect.

[0061] Embodiment 6

[0062] A drying process of N-maleimide polymer, comprising the following steps:

[0063] S1: After centrifugation, the N-phenyl maleimide polymer is conveyed into the feeding hopper 2 at a speed of 1 kg / min by the elevator, at this time the material is a granular crystal containing a small amount of moisture, which enters the inside of the drying tower 1 through the feeding hopper 2, falls to the retarding disc 4, and is slowly sprinkled through the material falling opening 401 formed on the retarding disc 4, and falls layer by layer downward, hot air enters through the hot gas inlet pipe 102, the hot air flow rate is 3-4 L / min, and the hot air is discharged from the hot gas discharge pipe 103, the temperature inside the drying tower 1 is maintained at 50-60℃, a hot flow is formed from bottom to top in the inside of the drying tower 1, thereby drying the sprinkled material, and finally the completed material is gathered at the bottom of the drying tower 1, and then can be discharged through the discharge port 101;

[0064] S2: In the process of feeding, the feeding inclined pipe 207 is constantly rotated, so that the material can be uniformly sprinkled on the top end of the retarding disc 4, the dispersion degree of the material is improved, and the drying effect of the material is improved.

[0065] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0066] In the present application, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection", "fixation" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0067] The control mode of the present application is automatically controlled by the controller, and the control circuit of the controller can be realized by simple programming by those skilled in the art, the power supply also belongs to the common knowledge in the art, and the present application is mainly used to protect mechanical devices, so the control mode and circuit connection of the present application will not be explained in detail.

[0068] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical solution and inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A drying system for N-maleimide polymers, comprising a drying tower (1), characterized in that: The top of the drying tower (1) is provided with a feed hopper (2), the bottom of the drying tower (1) is provided with a discharge port (101), the drying tower (1) is also provided with a hot air inlet pipe (102) near the bottom, the top of the drying tower (1) is provided with a hot air outlet pipe (103), the bottom of the feed hopper (2) extends into the interior of the drying tower (1) and is connected to a feed inclined pipe (207) through a rotary joint (206), the interior of the drying tower (1) is provided with a material slowing mechanism, the material slowing mechanism includes a slowing disc (4), the slowing disc (4) is a conical structure, and multiple long strip-shaped material dropping openings (401) are opened on the slowing disc (4). The top of the slowing disc (4) is rotatably mounted with a disc (5) via a support rod (402). The top of the disc (5) is fixed with a toothed ring (502) and a connecting frame (501). The connecting frame (501) is fixed to the feed inclined tube (207). The slowing disc (4) is provided with a plurality of first scrapers (505) above it. The top of the first scraper (505) extends movably to the top of the disc (5) and is fixed with a lifting ring (506). A threaded sleeve is fixed on the lifting ring (506). A reciprocating screw (503) is rotatably installed at the center of the top of the disc (5). The threaded sleeve is threaded on the outside of the reciprocating screw (503). A first gear (504) is fixed at the top of the reciprocating screw (503). An incomplete gear (303) is provided between the toothed ring (502) and the first gear (504). Both the toothed ring (502) and the first gear (504) mesh with the incomplete gear (303), but they do not mesh at the same time.

2. The drying system for N-maleimide polymer according to claim 1, characterized in that: A dual-axis rotary motor (3) is fixed on one side of the feed hopper (2). One of the output shafts of the dual-axis rotary motor (3) is fixed to an incomplete gear (303). The other output shaft of the dual-axis rotary motor (3) is fixed to a first rotating shaft (301). The first rotating shaft (301) extends into the feed hopper (2) and is fixed to a second gear (302).

3. The drying system for N-maleimide polymer according to claim 2, characterized in that: The feed hopper (2) is rotatably mounted with a vertically arranged second rotating shaft (202) via a fixed frame (201). A third gear (203) is fixed at the top of the second rotating shaft (202). The second gear (302) meshes with the third gear (203). Multiple second scrapers (205) are fixed on the outside of the second rotating shaft (202).

4. The drying system for an N-maleimide polymer according to claim 3, characterized in that: The bottom end of the second rotating shaft (202) extends into the interior of the drying tower (1) and is fixed with a dredging rod (204).

5. The drying system for an N-maleimide polymer according to claim 4, characterized in that: The material slowing mechanism is provided in multiple sets, and the multiple sets of material slowing mechanisms are distributed equidistantly from top to bottom in the drying tower (1). The incomplete gear (303) in the material slowing mechanism located below is rotatably connected to the bottom end of the slowing disk (4) above it. A single-axis rotary motor (6) is fixed on the outer wall of the drying tower (1). The output shaft of the single-axis rotary motor (6) extends into the interior of the drying tower (1) and is fixed with a first bevel gear (601). A second bevel gear (602) is fixed on the rotating shaft of the incomplete gear (303). The first bevel gear (601) meshes with the second bevel gear (602).

6. The drying system for an N-maleimide polymer according to claim 5, characterized in that: The hot gas inlet pipe (102) is connected to a distribution coil (104) at one end inside the drying tower (1). Multiple gas distribution ports (105) are evenly distributed on the distribution coil (104), and a barrier net (106) is installed inside the gas distribution port (105).

7. A drying process for an N-maleimide polymer, applied to a drying system for an N-maleimide polymer as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: The N-phenylmaleimide polymer after centrifugation is conveyed to the feed hopper (2) at a speed of 1 kg / min by the elevator. At this time, the material is a granular crystal containing a small amount of moisture. It enters the interior of the drying tower (1) through the feed hopper (2) and falls onto the slow plate (4). It is slowly sprinkled down through the discharge opening (401) on the slow plate (4) and sprinkled down layer by layer. Hot air enters through the hot air inlet pipe (102) at a gas flow rate of 3-4 L / min and is discharged from the hot air outlet pipe (103). The internal temperature of the drying tower (1) is maintained between 50-60℃. A hot flow is formed from bottom to top inside the drying tower (1) to dry the sprinkled material. The final material is gathered at the bottom of the drying tower (1) and can then be discharged through the discharge port (101). S2: During the feeding process, the feed slant tube (207) rotates continuously, thereby ensuring that the material can be evenly sprinkled on the top of the slow plate (4), which can improve the dispersion of the material and thus improve the drying effect of the material.

Images