Adding device for AKD (alkyl ketene dimer) in surface sizing starch

Abstract

The utility model discloses a device for adding AKD (Alkyl Ketene Dimer) into surface sizing starch. The device comprises a storage barrel, a discharging mechanism and a heat exchange mechanism, the discharging mechanism comprises a discharging disc, a first rotating shaft, a supporting plate, a driving motor and a discharging pipe. The heat exchange mechanism comprises a heat exchange pipe, a semiconductor chilling plate, a refrigerant container and a circulating pump. The driving motor drives the first rotating shaft and the discharging disc to rotate, so that the discharging port can convey materials in the storage barrel to the discharging port, the materials are discharged through the discharging pipe, and accurate and controllable discharging is achieved; a refrigerant circularly flows in the heat exchange tube through the circulating pump, and the cold end of the semiconductor chilling plate is refrigerated, so that the refrigerant in the heat exchange tube is kept at a low temperature, the storage barrel is cooled, and the AKD wax powder in the storage barrel can be stored at a low temperature; meanwhile, the discharging pipe is heated by the hot end of the semiconductor chilling plate, the AKD wax powder is output from the discharging port for preheating, and the initial temperature of the AKD wax powder entering the reaction kettle is increased, so that the time of heating the AKD wax powder to be molten in the reaction kettle is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of sizing agent production equipment, in particular to an AKD adding device for surface sizing starch. Background Art

[0002] AKD, or alkyl ketene dimer, is an excellent neutral reactive synthetic sizing agent. It is used in papermaking in the form of an emulsion, which can impart water resistance to paper and effectively improve its strength, softness, durability and printability.

[0003] In the production of surface sizing agents, AKD wax powder needs to be added to the reactor. Since AKD wax powder is susceptible to moisture and has a low melting point (approximately 52 degrees), it should be stored dry at a temperature not exceeding 35 degrees. When adding AKD wax powder to the reactor, the reactor needs to be heated to melt the AKD wax powder, and then the molten AKD is mixed with other raw materials of the surface sizing agent for reaction. The heating and reaction processes of AKD wax powder will generate a lot of heat. During the continuous production process, the working environment is at a high temperature, which is not conducive to the storage of the unadded AKD wax powder. In addition, since the temperature of AKD wax powder is low when it is added to the reactor, it takes a long time for the AKD wax powder to be heated to a molten state in the reactor. Utility Model Content

[0004] Based on this, it is necessary to provide a device for adding AKD to surface sizing starch in order to solve the above technical problems.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an AKD adding device in surface sizing starch, comprising a storage barrel, a feeding port is arranged on the top of the storage barrel, and also comprises a discharging mechanism and a heat exchange mechanism;

[0006] The discharging mechanism comprises a discharging tray, a first rotating shaft, a supporting plate, a driving motor, and a feeding pipe, wherein the first rotating shaft is rotatably mounted at the bottom of the storage barrel, the upper end of the first rotating shaft extends into the storage barrel and is fixedly connected to the discharging tray, the lower end of the storage barrel is radially provided with a movable opening corresponding to the discharging tray, the discharging tray portion extends out of the storage barrel from the movable opening, a plurality of discharging openings distributed in a circumference are provided on the discharging tray, the supporting plate is fixedly mounted on the storage barrel, the upper end surface of the supporting plate is slidingly and sealingly connected to the lower end surface of the portion of the discharging tray extending out of the storage barrel, a feeding opening corresponding to the discharging opening is provided on the supporting plate, a feeding pipe connected to the feeding opening is fixed at the lower end of the supporting plate, and the driving motor drives the first rotating shaft to rotate so that the discharging openings pass through the discharging openings one by one;

[0007] The heat exchange mechanism includes a heat exchange tube, a semiconductor refrigeration plate, a refrigerant container, and a circulation pump. The hot end of the semiconductor refrigeration plate is connected to the feed pipe, both ends of the heat exchange tube are connected to the refrigerant container, the heat exchange tube is spirally coiled on the storage barrel and connected to the cold end of the semiconductor refrigeration plate, and the circulation pump is installed on the heat exchange tube.

[0008] Preferably, it also includes an air supply mechanism, which includes an upper cover plate, an air supply duct, an air supply hood, and a first fan. The upper cover plate is fixedly mounted on the storage barrel, and the lower end surface of the upper cover plate is slidingly and sealingly connected to the upper end surface of the portion of the storage barrel extending from the discharge tray. An air supply port is opened on the upper cover plate and is located directly above the discharge port. An air supply duct connected to the air supply port is fixed on the upper cover plate, and an air supply hood is fixed on one end of the air supply duct away from the air supply port, and the first fan is installed in the air supply hood.

[0009] Preferably, a groove adapted to the discharge tray is provided on the inner wall of the bottom end of the storage barrel, the groove is connected to the movable opening, the discharge tray moves in the groove, and the top of the discharge tray is flush with the inner wall of the bottom end of the storage barrel.

[0010] Preferably, the discharging mechanism also includes a second rotating shaft and a stirring blade. The second rotating shaft is rotatably installed at the bottom of the storage barrel. The upper end of the second rotating shaft extends into the storage barrel and is fixed with a stirring blade. The stirring blade and the top end of the discharging tray are clearly matched. The driving motor is connected to the second rotating shaft through a coupling, and the first rotating shaft and the second rotating shaft are connected through a transmission assembly.

[0011] Preferably, the transmission assembly includes a first pulley, a second pulley and a transmission belt, the first pulley, the second pulley and the transmission belt, the first pulley is fixedly mounted on the first rotating shaft, the second pulley is fixedly mounted on the second rotating shaft, and the first pulley and the second pulley are connected via a transmission belt.

[0012] Preferably, a protective shell is fixed to the bottom end of the storage barrel, the transmission assembly is located in the protective shell, the drive motor is fixedly installed at the bottom end of the protective shell, and a support leg is fixed to the bottom end of the protective shell.

[0013] Preferably, a feed cover is detachably mounted on the feed port.

[0014] Preferably, a heat dissipation fin is installed on the refrigerant container, and a second fan is installed on the heat dissipation fin.

[0015] Preferably, a temperature sensor is installed at the top of the storage barrel, and a probe of the temperature sensor is located inside the storage barrel.

[0016] Preferably, a sealing ring is installed inside the movable opening, and the discharge tray is sealed and connected to the movable opening via the sealing ring.

[0017] Compared with the prior art, this technical solution has at least one of the following beneficial effects:

[0018] The first rotating shaft and the discharge plate are driven to rotate by the driving motor, and the material enters the discharge port when it is inside the storage barrel. When the discharge port rotates to the outside of the storage barrel and above the discharge port, the material in the discharge port falls into the discharge port and is discharged from the discharge pipe, thereby realizing precise and controllable discharge.

[0019] The refrigerant is circulated in the heat exchange tube by a circulating pump, and the cold end of the semiconductor refrigeration plate is cooled to keep the refrigerant in the heat exchange tube at a low temperature, thereby cooling the storage barrel and storing the AKD wax powder in the storage barrel at a low temperature. At the same time, the hot end of the semiconductor refrigeration plate heats the discharge pipe. When the AKD wax powder is output at the discharge port, the AKD wax powder is preheated to increase the initial temperature of the AKD wax powder when it enters the reactor, thereby shortening the time for the AKD wax powder to be heated to melt in the reactor and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0021] Figure 2 for Figure 1 A partial enlarged schematic diagram of point C in the middle;

[0022] Figure 3 for Figure 1 Sectional view along line AA;

[0023] Figure 4 for Figure 1 Sectional view along line BB;

[0024] Figure 5 For Figure 4 A schematic diagram when the discharge tray, the first rotating shaft and the second rotating shaft are omitted;

[0025] In the figure, 1, storage barrel; 2, feed port; 3, discharge tray; 4, first rotating shaft; 5, support plate; 6, driving motor; 7, movable port; 8, discharge port; 9, discharge port; 10, discharge pipe; 11, heat exchange pipe; 12, semiconductor refrigeration plate; 13, refrigerant container; 14, circulation pump; 15, upper cover plate; 16, air supply duct; 17, air supply hood; 18, first fan; 19, air supply port; 20, groove; 21, second rotating shaft; 22, stirring blade; 23, first pulley; 24, second pulley; 25, transmission belt; 26, protective shell; 27, support leg; 28, feed cover; 29, heat dissipation fin; 30, second fan; 31, temperature sensor; 32, sealing ring. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0027] See also Figures 1 to 5 , the embodiment of the present application provides a device for adding AKD to surface sizing starch, comprising a storage barrel 1, a discharging mechanism and a heat exchanger, and a feed port 2 is provided on the top of the storage barrel 1;

[0028] The discharging mechanism includes a discharging tray 3, a first rotating shaft 4, a supporting plate 5, a driving motor 6 and a feeding tube 10. The first rotating shaft 4 is rotatably mounted on the bottom of the storage barrel 1 through a sealed bearing. The upper end of the first rotating shaft 4 extends into the storage barrel 1 and is fixedly connected to the discharging tray 3. The lower end of the storage barrel 1 is radially provided with a movable opening 7 corresponding to the discharging tray 3. The discharging tray 3 partially extends out of the storage barrel 1 from the movable opening 7. The discharging tray 3 is provided with four circumferentially distributed discharging openings 8. The supporting plate 5 is fixedly mounted on the storage barrel 1. The upper end surface of the supporting plate 5 is connected to the lower end surface of the part of the discharging tray 3 extending out of the storage barrel 1. Sliding sealing connection, a discharge port 9 corresponding to the discharge port 8 is opened on the support plate 5, and a discharge pipe 10 connected to the discharge port 9 is fixed at the lower end of the support plate 5. The driving motor 6 drives the first rotating shaft 4 to rotate so that the discharge ports 8 pass through the discharge port 8 one by one; the driving motor 6 uses a stepping motor or a servo motor, which can accurately drive the discharge tray 3 to rotate a preset angle, thereby controlling the discharge amount; the support plate 5 is crescent-shaped and can hold up the material. When the discharge tray 3 rotates, it prevents the material in the discharge port 8 from leaking before moving to the discharge port 9, so that the material in the discharge port 8 is conveniently transported to the discharge port 9;

[0029] The heat exchange mechanism includes a heat exchange tube 11, a semiconductor refrigeration sheet 12, a refrigerant container 13, and a circulation pump 14. The hot end of the semiconductor refrigeration sheet 12 is connected to the feed pipe 10, and both ends of the heat exchange tube 11 are connected to the refrigerant container 13. The heat exchange tube 11 is spirally coiled on the storage barrel 1 and connected to the cold end of the semiconductor refrigeration sheet 12. The circulation pump 14 is installed on the heat exchange tube 11.

[0030] In this embodiment, the first rotating shaft 4 and the discharge plate 3 are driven to rotate by the driving motor 6, and the material enters the discharge port 8 when it is in the storage barrel 1. When the discharge port 8 rotates to the outside of the storage barrel 1 and above the discharge port 9, the material in the discharge port 8 falls into the discharge port 9 and is discharged from the discharge pipe 10 to achieve discharge.

[0031] The refrigerant container 13 and the heat exchange tube 11 are filled with refrigerant. By turning on the semiconductor refrigeration plate 12 and the circulation pump 14, the refrigerant circulates in the heat exchange tube 11 through the circulation pump 14, and the cold end of the semiconductor refrigeration plate 12 is refrigerated to keep the refrigerant in the heat exchange tube 11 at a low temperature. The refrigerant in the heat exchange tube 11 exchanges heat with the storage barrel 1 to cool the storage barrel 1, so that the AKD wax powder in the storage barrel 1 can be stored at a low temperature; at the same time, the hot end of the semiconductor refrigeration plate 12 generates heat to heat the discharge pipe 10. When the AKD wax powder is output from the discharge port 9, the AKD wax powder can contact the discharge pipe 10, thereby preheating the AKD wax powder and increasing the initial temperature of the AKD wax powder when it enters the reactor, thereby shortening the time for the AKD wax powder to be heated to melt in the reactor and improving production efficiency.

[0032] In a preferred embodiment, in order to prevent the hot end of the semiconductor cooling chip 12 from heating the feed tube 10 when it is working, resulting in the feed tube 10 being too hot, the heat dissipation efficiency of the hot end of the semiconductor cooling chip 12 being poor, and the AKD wax powder adhering to the inner wall of the feed tube 10, please refer to Figures 1 to 3 , an air supply mechanism is also provided, the air supply mechanism includes an upper cover plate 15, an air supply duct 16, an air supply cover 17, and a first fan 18. The upper cover plate 15 is fixedly installed on the storage barrel 1, the upper cover plate 15 is crescent-shaped, and the upper cover plate 15 has the same structure as the support plate 5. The lower end surface of the upper cover plate 15 is slidingly and sealingly connected with the upper end surface of the portion of the discharge tray 3 extending out of the storage barrel 1. The upper cover plate 15 is provided with an air supply port 19 located just above the discharge port 9. The upper cover plate 15 is fixed with an air supply duct 16 connected with the air supply port 19. The air supply cover 17 is fixed to one end of the air supply duct 16 away from the air supply port 19, and the first fan 18 is installed in the air supply cover 17. By setting the upper cover plate 15, only when the discharge port 8 moves to between the air supply port 19 and the discharge port 9, the first fan 18 can supply air to the air supply port 19 through the air supply cover 17 and the air supply duct 16, so as to prevent the wind from blowing away the materials in the discharge port 8 that have not moved to the discharge port 9. The first fan 18 supplies air to the discharge port 8 that moves to the discharge port 9, which can promote the discharge of materials. At the same time, when the discharge port 8 stops at the discharge port 9 in the gap, the air supply port 19 can continuously supply air to the discharge port 9 and the discharge pipe 10, so as to cool the discharge pipe 10 and blow down the AKD materials adhering to the inner wall of the discharge pipe 10.

[0033] In a preferred embodiment, in order to allow the material in the storage barrel 1 to be fully discharged, please refer to Figure 2 and Figure 5 A groove 20 adapted to the discharge tray 3 is provided on the inner wall of the bottom end of the storage barrel 1. The groove 20 is connected to the movable opening 7. The discharge tray 3 moves in the groove 20. The discharge tray 3 and the groove 20 are slidingly sealed or gap-fitted. The top of the discharge tray 3 is flush with the inner wall of the bottom end of the storage barrel 1.

[0034] See also Figure 1 and Figure 2 The discharging mechanism also includes a second rotating shaft 21 and a stirring blade 22. The second rotating shaft 21 is rotatably mounted at the bottom of the storage barrel 1 through a sealed bearing. The upper end of the second rotating shaft 21 extends into the storage barrel 1 and is fixed with a stirring blade 22. The stirring blade 22 is in clearance with the top of the discharging plate 3. The driving motor 6 is connected to the second rotating shaft 21 through a coupling. The first rotating shaft 4 and the second rotating shaft 21 are connected through a transmission assembly. The transmission assembly includes a first pulley 23, a second pulley 24 and a transmission belt 25. The first pulley 23 is fixedly mounted on the first rotating shaft 4, and the second pulley 24 is fixedly mounted on the second rotating shaft 21. The first pulley 23 and the second pulley 24 are connected through a transmission belt 25. The first pulley 23 and the second pulley 24 can be synchronous pulleys or pulleys.

[0035] The driving motor 6 drives the second rotating shaft 21 and the stirring blade 22 to rotate through the coupling. The second rotating shaft 21 drives the first pulley 23, the first rotating shaft 4, and the discharge tray 3 to rotate through the second pulley 24 and the transmission belt 25. When the discharge tray 3 discharges material, the stirring blade 22 stirs the material in the storage barrel 1 so that the material can evenly contact the inner wall of the storage barrel 1 to facilitate the cooling of the material. At the same time, when the material is insufficient, the stirring blade 22 can move the material away from the discharge tray 3 to the discharge tray 3, avoiding the existence of a dead angle for discharging, which makes it impossible for the material on the side away from the discharge tray 3 to be discharged normally.

[0036] See also Figure 1 A protective shell 26 is fixed at the bottom of the storage barrel 1, the transmission assembly is located in the protective shell 26, the drive motor 6 is fixedly installed at the bottom of the protective shell 26, and a support leg 27 is fixed at the bottom of the protective shell 26. The protective shell 26 protects the transmission assembly, avoids safety accidents caused by manual accidental touch, and avoids impurities from contacting the transmission assembly and causing the transmission assembly to fail to work normally.

[0037] In a preferred embodiment, in order to facilitate moisture-proof and low-temperature storage of the material in the storage barrel 1, please refer to Figure 1 A feed cover 28 is detachably mounted on the feed port 2. The feed port 2 is connected to the feed cover 28 by a cover or by a threaded connection. By opening the feed cover 28, materials can be put into the storage barrel 1 through the feed port 2; by closing the feed cover 28, the materials in the storage barrel 1 can be sealed and stored to prevent moisture from entering.

[0038] In a preferred embodiment, in order to facilitate heat dissipation of the refrigerant in the refrigerant container 13, please refer to Figure 1A heat dissipation fin 29 is installed on the refrigerant container 13, and a second fan 30 is installed on the heat dissipation fin 29. The heat dissipation fin 29 has a large contact area with the air, which can improve the heat dissipation efficiency of the refrigerant container 13. After the second fan 30 is turned on, the heat dissipation efficiency of the refrigerant container 13 can be further improved.

[0039] In a preferred embodiment, in order to facilitate the detection of the temperature inside the storage barrel 1, please refer to Figure 1 A temperature sensor 31 is installed at the top of the storage barrel 1, and the probe of the temperature sensor 31 is located in the storage barrel 1. This embodiment also provides a controller, which is not shown. The controller is electrically connected with the temperature sensor 31, the drive motor 6, the semiconductor cooling sheet 12, and the circulation pump 14. When the temperature detected by the temperature sensor 31 is higher than the preset value, the controller controls the semiconductor cooling sheet 12 and the circulation pump 14 to work and cool the storage barrel 1. The controller can also be electrically connected with the first fan 18 and the second fan 30 to control the first fan 18 and the second fan 30 to work.

[0040] In a preferred embodiment, in order to prevent the material from leaking between the movable opening 7 and the discharge tray 3, and to prevent the external temperature and humidity from affecting the internal temperature and humidity of the storage barrel 1 through the movable opening 7, please refer to Figure 2 A sealing ring 32 is installed inside the movable port 7, and the discharge tray 3 is sealed with the movable port 7 through the sealing ring 32. By setting the sealing ring 32, the material can be prevented from moving out from between the movable port 7 and the discharge tray 3, and the water vapor can be prevented from entering the storage barrel 1 from between the movable port 7 and the discharge tray 3.

[0041] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A device for adding AKD to surface sizing starch, comprising a storage barrel (1), wherein a feed inlet (2) is provided at the top of the storage barrel (1), and wherein: It also includes a discharging mechanism and a heat exchanging mechanism; The discharging mechanism comprises a discharging tray (3), a first rotating shaft (4), a supporting plate (5), a driving motor (6), and a discharging pipe (10). The first rotating shaft (4) is rotatably mounted on the bottom of the storage barrel (1). The upper end of the first rotating shaft (4) extends into the storage barrel (1) and is fixedly connected to the discharging tray (3). The lower end of the storage barrel (1) is radially provided with a movable opening (7) corresponding to the discharging tray (3). The discharging tray (3) partially extends out of the storage barrel (1) from the movable opening (7). There are a plurality of discharge ports (8) distributed in a circumferential manner, the support plate (5) is fixedly mounted on the storage barrel (1), the upper end surface of the support plate (5) is slidably and sealingly connected to the lower end surface of the portion of the discharge plate (3) extending out of the storage barrel (1), a discharge port (9) corresponding to the discharge port (8) is opened on the support plate (5), a discharge pipe (10) connected to the discharge port (9) is fixed at the lower end of the support plate (5), and a driving motor (6) drives the first rotating shaft (4) to rotate so that the discharge ports (8) pass through the discharge port (8) one by one; The heat exchange mechanism comprises a heat exchange tube (11), a semiconductor refrigeration sheet (12), a refrigerant container (13), and a circulation pump (14); the hot end of the semiconductor refrigeration sheet (12) is connected to the feed pipe (10); both ends of the heat exchange tube (11) are connected to the refrigerant container (13); the heat exchange tube (11) is spirally wound on the material storage barrel (1) and connected to the cold end of the semiconductor refrigeration sheet (12); and the circulation pump (14) is installed on the heat exchange tube (11).

2. The device for adding AKD to the surface sizing starch according to claim 1, characterized in that: The invention also comprises an air supply mechanism, wherein the air supply mechanism comprises an upper cover plate (15), an air supply duct (16), an air supply cover (17), and a first fan (18). The upper cover plate (15) is fixedly mounted on the material storage barrel (1). The lower end surface of the upper cover plate (15) is slidably and sealingly connected to the upper end surface of the portion of the material discharge tray (3) extending out of the material storage barrel (1). The upper cover plate (15) is provided with an air supply port (19) located directly above the material discharge port (9). The upper cover plate (15) is fixed with an air supply duct (16) connected to the air supply port (19). The air supply cover (17) is fixed to one end of the air supply duct (16) away from the air supply port (19). The first fan (18) is mounted in the air supply cover (17).

3. The device for adding AKD to the surface sizing starch according to claim 1, characterized in that: A groove (20) adapted to the discharge tray (3) is provided on the inner wall of the bottom end of the storage barrel (1), the groove (20) being connected to the movable opening (7), the discharge tray (3) being movable in the groove (20), and the top end of the discharge tray (3) being flush with the inner wall of the bottom end of the storage barrel (1).

4. The device for adding AKD to the surface sizing starch according to claim 3, characterized in that: The discharging mechanism further comprises a second rotating shaft (21) and a stirring blade (22); the second rotating shaft (21) is rotatably mounted at the bottom of the storage barrel (1); the upper end of the second rotating shaft (21) extends into the storage barrel (1) and is fixed with the stirring blade (22); the stirring blade (22) is clearance-matched with the top end of the discharging tray (3); the driving motor (6) is connected to the second rotating shaft (21) via a coupling; and the first rotating shaft (4) and the second rotating shaft (21) are transmission-connected via a transmission assembly.

5. The device for adding AKD to the surface sizing starch according to claim 4, characterized in that: The transmission assembly comprises a first pulley (23), a second pulley (24) and a transmission belt (25); the first pulley (23), the second pulley (24) and the transmission belt (25); the first pulley (23) is fixedly mounted on the first rotating shaft (4); the second pulley (24) is fixedly mounted on the second rotating shaft (21); and the first pulley (23) and the second pulley (24) are connected to each other via the transmission belt (25).

6. The device for adding AKD to the surface sizing starch according to claim 5, characterized in that: A protective shell (26) is fixed to the bottom end of the storage barrel (1), a transmission assembly is located inside the protective shell (26), a drive motor (6) is fixedly mounted on the bottom end of the protective shell (26), and a support leg (27) is fixed to the bottom end of the protective shell (26).

7. The device for adding AKD to the surface sizing starch according to claim 1, characterized in that: A feed cover (28) is detachably mounted on the feed opening (2).

8. The device for adding AKD to surface sizing starch according to claim 1, characterized in that: The refrigerant container (13) is provided with a heat dissipation fin (29), and a second fan (30) is provided on the heat dissipation fin (29).

9. The device for adding AKD to surface sizing starch according to claim 1, characterized in that: A temperature sensor (31) is installed at the top of the material storage barrel (1), and a probe of the temperature sensor (31) is located inside the material storage barrel (1).

10. The device for adding AKD to surface sizing starch according to claim 1, characterized in that: A sealing ring (32) is installed inside the movable opening (7), and the discharge tray (3) is sealedly connected to the movable opening (7) via the sealing ring (32).

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