A functional chitosan drying device

Abstract

This application discloses a drying device for preparing functional chitosan, comprising a blower, a heating channel, a drying section, a cyclone separator, a bag filter, and an induced draft fan connected in sequence. The bottom of the cyclone separator is used for material discharge, and the top of the cyclone separator is connected to the bag filter via a connecting pipe. In this drying device, the bottom of the cyclone separator collects the dried material. Undried material is blocked by the grading ring, and material that is not fully dried and does not rise quickly enough is blocked by the rotating grid, thus falling and continuing to dry, thereby improving the drying effect. By raising and lowering the electric telescopic rod, the baffles and rotating grid can be shaken, which can effectively clean the residual material at the grading ring and rotating grid. After the material falls, it continues to dry, resulting in a good drying effect.

Description

Technical Field

[0001] This invention relates to the field of chitosan preparation technology, and more specifically, to a drying apparatus for preparing functional chitosan. Background Technology

[0002] The preparation of chitosan requires first extracting chitin from shrimp and crab shells, and then preparing chitosan from the chitin. Before obtaining dried chitosan, it is in a paste-like state and needs to be dried using drying equipment. A rotary flash dryer is suitable for paste-like materials awaiting drying. Hot air enters tangentially through the air inlet at the bottom of the dryer, forming a spiral-shaped, high-speed rotating airflow. The material is rapidly dispersed under the impact and impetus of the high-speed airflow and rotates at high speed with the airflow, completing the drying process.

[0003] In existing rotary flash dryers, uneven drying may occur during the drying process. Some materials may not be fully exposed to the hot air, resulting in poor drying performance. Therefore, a classifying plate is typically installed in the rising channel of the flash dryer to block incompletely dried materials. However, existing classifying devices have limitations in blocking materials; some undried materials cannot be effectively blocked. Furthermore, the classifying device itself may experience jamming and material adhesion after a period of use, making it difficult to clean effectively. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of the prior art and provide a drying device for preparing functional chitosan.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a drying device, comprising a blower, a heating channel, a drying section, a cyclone separator, a bag filter, and an induced draft fan connected in sequence; the bottom end of the cyclone separator is used for material discharge, and the top end of the cyclone separator is connected to the bag filter via a connecting pipe; the heating channel includes a ventilation pipe and a heating unit installed at the ventilation pipe; the drying section includes a frame, a first cylindrical chamber installed on the frame, a second cylindrical chamber fixedly connected to the first cylindrical chamber, a first connecting pipe connecting the first cylindrical chamber and the heating channel, a second connecting pipe connecting the second cylindrical chamber and the cyclone separator, a crushing shaft installed on the frame and extending into the first cylindrical chamber, multiple crushing rods installed on the crushing shaft, a first driven wheel installed on the crushing shaft, a first motor installed on the frame, a first driving wheel installed on the first motor, and a first synchronous belt connecting the first driving wheel and the first driven wheel; the second cylindrical chamber is connected to a screw feeder.

[0006] Furthermore, the screw feeder has a hopper.

[0007] Furthermore, it also includes another screw feeder for feeding material into the hopper.

[0008] Other methods of feeding materials into the hopper can also be configured as needed.

[0009] Furthermore, the drying device is a rotary flash dryer.

[0010] Furthermore, the second cylindrical chamber includes a circumferential plate and a top plate, the circumferential plate extending into the first cylindrical chamber, and a gap for air intake between the bottom end of the circumferential plate and the bottom end of the first cylindrical chamber.

[0011] This allows for better air intake into the second cylindrical cavity, creating a rotating and rising airflow.

[0012] Furthermore, a bearing is installed between the crushing shaft and the frame.

[0013] This is used to reduce friction and support the rotation of the crushing shaft.

[0014] In some embodiments, a shaft seal is installed between the first cylindrical chamber and the crushing shaft.

[0015] This provides a good seal.

[0016] Furthermore, a grading ring, a rotating grid, and a cleaning unit are installed within the first cylindrical cavity. A second motor, a mounting frame, a second driving wheel driven by the second motor, a second driven wheel connected to the second driving wheel via a second synchronous belt, and an electric telescopic rod fixed to the mounting frame are installed on the top plate of the first cylindrical cavity. The grading ring includes an annular fixed plate fixedly connected to a circumferential plate and multiple baffles. Each baffle is connected to the annular fixed plate by a connecting spring. The multiple baffles are distributed in an annular pattern with equal spacing, and when there is no external force, the multiple baffles are spliced ​​together to form an inverted frustum shape. The rotating grid includes an outer annular plate, an inner annular plate, and multiple grids connecting the outer and inner annular plates. The inner annular plate is fixedly connected to a lower rotating tube, which is connected to an upper rotating tube via a connecting spring. The upper rotating tube passes through the top plate and is fixedly connected to a second driven wheel. The cleaning unit includes a circular plate portion, a circular ring portion, and multiple radial rods connecting the circular plate portion and the circular ring portion. The circular plate portion is connected to a lower lifting rod, which is connected to an upper lifting rod. The upper lifting rod is connected to an electric telescopic rod. Multiple lifting push rods are fixedly connected to the lower surface of the circular ring portion. The number of lifting push rods is equal to the number of connecting springs, and the two correspond one-to-one. The upper surface of the circular plate portion has multiple first hemispherical protrusions, and the lower surface of the inner annular plate has multiple second hemispherical protrusions.

[0017] Furthermore, the bottom end of the lifting push rod can push down the connecting spring.

[0018] Thus, the vibration of the baffle and the rotating grid can effectively clean the residual material at the grading ring and the rotating grid.

[0019] Furthermore, the lower lifting rod passes through the lower rotating tube, and the upper lifting rod is inserted into the upper rotating tube. Both the lower and upper lifting rods are cylindrical rods, and the radius of the lower lifting rod is less than or equal to half the radius of the upper lifting rod.

[0020] This creates a gap between the lower lifting rod and the lower rotating tube, thus providing space for the shaking of the rotating grille.

[0021] In some embodiments, a bearing is installed between the upper lifting rod and the upper rotating tube.

[0022] This makes the rotation between the upper rotating tube and the upper lifting rod more stable.

[0023] In some embodiments, a shaft seal is installed between the upper lifting rod and the upper rotating tube.

[0024] Furthermore, a bearing is installed between the upper rotating tube and the top plate, and the mounting bracket is an inverted U-shaped bracket.

[0025] Furthermore, the baffle has 6 sections; the height of the inner annular plate is lower than the height of the outer annular plate, and the multiple grid strips are distributed in a ring with equal spacing.

[0026] Furthermore, the outer diameter of the outer annular plate is more than 2 cm smaller than the inner diameter of the circumferential plate.

[0027] This ensures that the rotating grille will not touch the circumferential plate when it vibrates.

[0028] Furthermore, the connecting spring includes a first plate body fixedly connected to the annular fixing plate, a second plate body connected to the baffle, and an arc-shaped plate body connecting the first plate body and the second plate body.

[0029] This provides better elasticity when subjected to external forces. When the lifting rod is pushed downwards, the curved plate can bend more easily, allowing the baffle to move downwards more easily. When the external force is removed, the elasticity of the curved plate helps the baffle to quickly return to its original position.

[0030] Furthermore, the bottom end of the lifting push rod is hemispherical; multiple guide units are fixed at the annular fixing plate, the number of guide units is equal to the number of lifting push rods and the two correspond one-to-one, the guide unit includes a limiting block and a connecting plate connecting the limiting block and the annular fixing plate, and the limiting block has a limiting guide hole into which the lifting push rod is inserted.

[0031] The hemispherical shape at the bottom of the lifting push rod reduces friction, and the guide unit provides guidance and limit for the lifting and lowering of the push rod.

[0032] Beneficial effects:

[0033] 1. In the drying device of this application, the bottom end of the cyclone separator collects the dried material. Undried material is blocked by the grading ring, and material that is not fully dried and does not rise fast enough is also blocked by the rotating grid, so it falls down and continues to be dried, thereby improving the drying effect of the material.

[0034] 2. The cleaning unit of this application, through the raising and lowering of the electric telescopic rod, can cause the baffle and rotating grid to vibrate, thereby effectively cleaning the residual material at the grading ring and rotating grid. After the material falls, it continues to dry, resulting in a good drying effect. Furthermore, the cleaning process is highly efficient, reducing equipment downtime and improving production efficiency. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the drying device;

[0036] Figure 2 This is a schematic diagram of the interior of the first cylindrical cavity;

[0037] Figure 3 A schematic diagram of the interior of the second cylindrical cavity from a first-view perspective;

[0038] Figure 3A This is a magnified view of the 3A area;

[0039] Figure 3B This is a magnified view of region 3B;

[0040] Figure 3C This is a magnified view of the 3C area;

[0041] Figure 4 A schematic diagram of the interior of the second cylindrical cavity from a second perspective;

[0042] Figure 4A This is a magnified view of area 4A;

[0043] Figure 4B This is a magnified view of region 4B;

[0044] Figure 5 This is a schematic diagram of the cross-sections of the upper and lower rotating tubes;

[0045] Figure 5A This is a magnified view of area 5A.

[0046] Explanation of reference numerals in the attached drawings: 1. Blower; 2. Heating channel section; 3. Drying section; 3.1 Frame; 3.2 First cylindrical chamber; 3.3 Second cylindrical chamber; 3.3.1 Circumferential plate; 3.3.2 Top plate; 3.4 First connecting pipe; 3.5 Second connecting pipe; 3.6 Crushing shaft; 3.7 Crushing rod; 3.8 First driven wheel; 3.9 First motor; 3.10 First synchronous belt; 3.11 Screw feeder; 4. Cyclone separator; 4.1 Connecting pipe; 5. Bag filter; 6. Exhaust fan; 7.1 Second motor; 7.2 Mounting frame; 7.3 Second driving wheel; 7.4 Second synchronous belt; 7.5 Second driven wheel; 7.6 Drive wheel; 8.1 Electric telescopic rod; 8.2 Annular fixed plate; 8.3 Baffle; 8.4 Connecting spring; 8.5 First plate; 8.6 Arc-shaped plate; 8.7 Second plate; 9.1 Outer annular plate; 9.2 Inner annular plate; 9.2.1 Second hemispherical protrusion; 9.3 Grille strip; 9.4 Lower rotating tube; 9.5 Connecting spring; 9.6 Upper rotating tube; 10.1 Circular plate part; 10.1.1 First hemispherical protrusion; 10.2 Circular part; 10.3 Radial rod; 10.4 Lower lifting rod; 10.5 Upper lifting rod; 10.6 Lifting push rod; 11.1 Limiting block; 11.2 Connecting plate. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] This invention provides, for example Figure 1-5AThe apparatus shown is a drying device for preparing functional chitosan, comprising a blower 1, a heating channel section 2, a drying section 3, a cyclone separator 4, a bag filter 5, and an induced draft fan 6 connected in sequence. The bottom end of the cyclone separator 4 is used for material discharge, and the top end of the cyclone separator 4 is connected to the bag filter 5 through a connecting pipe 4.1. The heating channel section 2 includes a ventilation pipe and a heating unit installed at the ventilation pipe. The drying section 3 includes a frame 3.1, a first cylindrical chamber 3.2 installed on the frame 3.1, and a second cylindrical chamber 3 fixedly connected to the first cylindrical chamber 3.2. 3. A first connecting pipe 3.4 connecting the first cylindrical chamber 3.2 and the heating channel section 2; a second connecting pipe 3.5 connecting the second cylindrical chamber 3.3 and the cyclone separator 4; a crushing shaft 3.6 installed at the frame 3.1 and extending into the first cylindrical chamber 3.2; multiple crushing rods 3.7 installed at the crushing shaft 3.6; a first driven wheel 3.8 installed at the crushing shaft 3.6; a first motor 3.9 installed at the frame 3.1; a first driving wheel installed at the first motor 3.9; and a first synchronous belt 3.10 connecting the first driving wheel and the first driven wheel 3.8. The second cylindrical chamber 3.3 includes a circumferential plate 3.3.1 and a top plate 3.3.2. The circumferential plate 3.3.1 extends into the first cylindrical chamber 3.2, and there is a gap between the bottom end of the circumferential plate 3.3.1 and the bottom end of the first cylindrical chamber 3.2 for air intake. A bearing is installed between the crushing shaft 3.6 and the frame 3.1.The first cylindrical chamber 3.2 is equipped with a grading ring, a rotating grid, and a cleaning unit. The top plate 3.3.2 of the first cylindrical chamber 3.2 is equipped with a second motor 7.1, a mounting bracket 7.2, a second driving wheel 7.3 driven by the second motor 7.1, a second driven wheel 7.5 connected to the second driving wheel 7.3 via a second synchronous belt 7.4, and an electric telescopic rod 7.6 fixed to the mounting bracket 7.2. The grading ring includes an annular fixing plate 8.1 fixedly connected to the circumferential plate 3.3.1 and multiple baffles 8.2. Each baffle 8.2 is connected to the annular fixing plate 8.1 by a connecting spring 8.3. The multiple baffles 8.2 are evenly spaced in a ring, and when there is no external force, the multiple baffles 8.2 are spliced ​​together to form an inverted frustum shape. The rotating grid includes an outer annular plate 9.1, an inner annular plate 9.2, and multiple grid strips 9.3 connecting the outer annular plate 9.1 and the inner annular plate 9.2. The inner annular plate 9.2 is fixedly connected to... A lower rotating tube 9.4 is connected to an upper rotating tube 9.6 via a connecting spring 9.5. The upper rotating tube 9.6 passes through the top plate 3.3.2 and is fixedly connected to the second driven wheel 7.5. The cleaning unit includes a circular plate portion 10.1, a circular ring portion 10.2, and multiple radial rods 10.3 connecting the circular plate portion 10.1 and the circular ring portion 10.2. The circular plate portion 10.1 is connected to a lower lifting rod 10.4, and the lower lifting rod 10.4 is connected to... The upper lifting rod 10.5 is connected to the electric telescopic rod 7.6. The lower surface of the circular part 10.2 is fixedly connected to a plurality of lifting push rods 10.6. The number of lifting push rods 10.6 is equal to the number of connecting spring pieces 8.3 and the two correspond one-to-one. The upper surface of the circular plate part 10.1 has a plurality of first hemispherical protrusions 10.1.1, and the lower surface of the inner annular plate 9.2 has a plurality of second hemispherical protrusions 9.2.1.

[0049] The lower lifting rod 10.4 passes through the lower rotating tube 9.4, and the upper lifting rod 10.5 is inserted into the upper rotating tube 9.6. Both the lower lifting rod 10.4 and the upper lifting rod 10.5 are cylindrical rods, and the radius of the lower lifting rod 10.4 is less than or equal to half the radius of the upper lifting rod 10.5. A bearing is installed between the upper rotating tube 9.6 and the top plate 3.3.2, and the mounting bracket 7.2 is an inverted U-shaped bracket. There are 6 baffles 8.2; the height of the inner annular plate 9.2 is lower than the height of the outer annular plate 9.1, and multiple grid strips 9.3 are distributed in a ring at equal intervals. The outer diameter of the outer annular plate 9.1 is more than 2 cm smaller than the inner diameter of the circumferential plate 3.3.1. The connecting spring 8.3 includes a first plate 8.3.1 fixedly connected to the annular fixing plate 8.1, a second plate 8.3.3 connected to the baffle 8.2, and an arc-shaped plate 8.3.2 connecting the first plate 8.3.1 and the second plate 8.3.3. The bottom end of the lifting push rod 10.6 is hemispherical; multiple guide units are fixed at the annular fixing plate 8.1, the number of guide units is equal to the number of lifting push rods 10.6 and the two correspond one-to-one. The guide unit includes a limiting block 11.1 and a connecting plate 11.2 connecting the limiting block 11.1 and the annular fixing plate 8.1. The limiting block 11.1 has a limiting guide hole into which the lifting push rod 10.6 is inserted.

[0050] The drying principle of the drying device in this application is as follows: the screw feeder is used to feed the paste-like material to the bottom of the second cylindrical chamber; the air generated by the blower is heated by the heating channel and then enters the first cylindrical chamber, and then enters the second cylindrical chamber, generating a rotating and rising hot airflow. The crushing rod rotates to crush and agitate the material. As the airflow rises, the undried material is blocked by the grading ring, and the material that is not completely dried and does not rise fast enough is also blocked by the rotating grid. After that, the airflow is separated by the cyclone separator, and the dried material is collected at the bottom of the cyclone separator. The airflow from the cyclone separator is discharged after being dusted by the bag filter.

[0051] As the airflow carrying the material rises within the first cylindrical chamber, uncooked lumpy material is blocked by the grading ring, and material that rises too slowly is blocked by the rotating grid (which rotates under the drive of a second motor during normal operation), causing it to fall and continue drying. After a period of use, material may remain below the baffle and at the rotating grid. The electric telescopic rod then descends, causing the lifting push rod to push the baffle downwards. The electric telescopic rod also rises, allowing the baffle to reset under the action of the connecting spring. Repeating this several times shakes the baffle, facilitating the falling of material from the baffle. The electric telescopic rod can also rise, causing the first hemispherical protrusion at the circular plate to contact the second hemispherical protrusion at the inner annular plate. At this time, the rotating grid rotates slowly. Because the lower and upper rotating tubes at the rotating grid are connected by a connecting spring, the rotating grid vibrates to a certain extent when the first and second hemispherical protrusions contact, further facilitating the falling of material at the rotating grid for continued drying. The above cleaning operation can be performed at regular intervals to clean the material at the grading ring and rotating grid.

[0052] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention without departing from the scope defined by the claims.

Claims

1. A drying apparatus for preparing functional chitosan, characterized in that, The system includes, in sequence, a blower, a heating channel, a drying section, a cyclone separator, a bag filter, and an induced draft fan. The bottom of the cyclone separator is used for material discharge, and the top of the cyclone separator is connected to the bag filter via a connecting pipe. The heating channel includes a ventilation pipe and a heating unit installed at the ventilation pipe. The drying section includes a frame, a first cylindrical chamber installed on the frame, a second cylindrical chamber fixedly connected to the first cylindrical chamber, a first connecting pipe connecting the first cylindrical chamber and the heating channel, and a connecting pipe connecting the second cylindrical chamber and the cyclone separator. The device includes a second connecting pipe, a crushing shaft mounted on the frame and extending into the first cylindrical chamber, multiple crushing rods mounted on the crushing shaft, a first driven wheel mounted on the crushing shaft, a first motor mounted on the frame, a first driving wheel mounted on the first motor, and a first synchronous belt connecting the first driving wheel and the first driven wheel. A screw feeder is connected to the second cylindrical chamber. A grading ring, a rotating grid, and a cleaning unit are installed inside the first cylindrical chamber. A second motor, a mounting bracket, and a second drive wheel driven by the second motor are installed on the top plate of the first cylindrical chamber. The system comprises a driving wheel, a second driven wheel connected to the second driving wheel via a second synchronous belt, and an electric telescopic rod fixed to the mounting bracket; the grading ring includes an annular fixed plate fixedly connected to a circumferential plate and multiple baffles, each baffle and the annular fixed plate being connected by a connecting spring, the multiple baffles being distributed in an annular shape with equal spacing, and when there is no external force, the multiple baffles are spliced ​​together to form an inverted frustum shape; the rotating grid includes an outer annular plate, an inner annular plate, and multiple grid strips connecting the outer annular plate and the inner annular plate, the inner annular plate being fixedly connected to a lower rotating tube, and the lower rotating tube being connected to an upper rotating tube via a connecting spring. The rotating tube passes through the top plate and is fixedly connected to the second driven wheel; the cleaning unit includes a circular plate part, a circular ring part, and a plurality of radial rods connecting the circular plate part and the circular ring part. The circular plate part is connected to a lower lifting rod, the lower lifting rod is connected to an upper lifting rod, and the upper lifting rod is connected to an electric telescopic rod. A plurality of lifting push rods are fixedly connected to the lower surface of the circular ring part. The number of lifting push rods is equal to the number of connecting spring pieces and the two correspond one-to-one. The upper surface of the circular plate part has a plurality of first hemispherical protrusions, and the lower surface of the inner annular plate has a plurality of second hemispherical protrusions.

2. The drying apparatus for preparing functional chitosan according to claim 1, characterized in that, The second cylindrical chamber includes a circumferential plate and a top plate. The circumferential plate extends into the first cylindrical chamber, and there is a gap between the bottom end of the circumferential plate and the bottom end of the first cylindrical chamber for air intake. A bearing is installed between the crushing shaft and the frame.

3. The drying apparatus for preparing functional chitosan according to claim 1, characterized in that, The lower lifting rod passes through the lower rotating tube, and the upper lifting rod is inserted into the upper rotating tube. Both the lower and upper lifting rods are cylindrical rods, and the radius of the lower lifting rod is less than or equal to half the radius of the upper lifting rod.

4. The drying apparatus for preparing functional chitosan according to claim 1, characterized in that, A bearing is installed between the upper rotating tube and the top plate, and the mounting frame is an inverted U-shaped frame.

5. The drying apparatus for preparing functional chitosan according to claim 1, characterized in that, The baffle has 6 sections; the height of the inner annular plate is lower than the height of the outer annular plate, and the multiple grid strips are distributed in a ring with equal spacing.

6. The drying apparatus for preparing functional chitosan according to claim 1, characterized in that, The outer diameter of the outer annular plate is more than 2 cm smaller than the inner diameter of the circumferential plate.

7. The drying apparatus for preparing functional chitosan according to claim 1, characterized in that, The connecting spring includes a first plate body fixedly connected to an annular fixing plate, a second plate body connected to a baffle, and an arc-shaped plate body connecting the first plate body and the second plate body.

8. The drying apparatus for preparing functional chitosan according to claim 1, characterized in that, The bottom end of the lifting push rod is hemispherical; multiple guide units are fixed at the annular fixing plate, the number of guide units is equal to the number of lifting push rods and the two correspond one-to-one, the guide unit includes a limiting block and a connecting plate connecting the limiting block and the annular fixing plate, and the limiting block has a limiting guide hole into which the lifting push rod is inserted.

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