Preparation method of bamboo charcoal down feather and down feather spraying and drying system thereof

Abstract

The invention discloses a preparation method of bamboo charcoal down feather and a down feather spraying and drying system thereof, and relates to the field of down feather preparation, and the preparation method comprises the following specific steps: a preparation stage: preparing down feather and bamboo charcoal suspension liquid; spraying and drying: spraying the bamboo charcoal suspension liquid onto the down feather through a down feather spraying and drying system, fully mixing the bamboo charcoal suspension liquid with the down feather, and then drying to obtain down feather with bamboo charcoal nano powder; and a powder removing stage: removing the bamboo charcoal powder in the down feather with the bamboo charcoal nano powder through a dust remover to obtain the bamboo charcoal down feather. By compounding the bamboo charcoal and the down feather, the down feather has the effects of deodorizing, absorbing moisture and quickly heating, and by designing a spray drying system used during compounding of the bamboo charcoal and the down feather, the compounding effect of the down feather and the bamboo charcoal is better, so that the overall quality and effect of the down feather are improved.

Description

Technical Field

[0001] The invention relates to the field of down production and preparation, and in particular to a method for preparing bamboo charcoal down and a down spray drying system thereof. Background Art

[0002] As is known to all, down refers to the down of birds, especially waterfowl such as ducks and geese, which is widely used to make warm clothing and other products;

[0003] During the production and preparation of down, since the properties of the down itself are relatively simple, in order to make it have rich functionality, people often compound the down with some materials so that the down has various functionalities after preparation. However, in the existing composite materials, on the one hand, the deodorization, moisture absorption and heating performance of the down are not greatly improved, and when the composite materials are compounded with the down, the performance of the down itself is easily damaged. Based on this, the present application designs a method for compounding down with bamboo charcoal and provides a down spray drying system for compounding down with bamboo charcoal. Summary of the invention

[0004] 1. Purpose of the invention

[0005] In view of this, the purpose of the present invention is to propose a method for preparing bamboo charcoal down and a down spray drying system thereof. The present invention composites bamboo charcoal with down to make the down have the effects of deodorizing, absorbing moisture and quickly heating up. In addition, the present invention designs a spray drying system used when the bamboo charcoal and down are composited, so that the composite effect of the down and bamboo charcoal is better, thereby improving the overall quality and efficacy of the down.

[0006] (II) Technical solution

[0007] In order to achieve the above technical purpose, the present invention provides a method for preparing bamboo charcoal down, and the specific steps are as follows:

[0008] Preparation stage: preparing a suspension of down and bamboo charcoal, wherein the down is washed down, and the bamboo charcoal suspension is a suspension of water and bamboo charcoal nanopowder mixed in a ratio of 100:1-2;

[0009] Spray drying stage: Spray the bamboo charcoal suspension onto the down through the down spray drying system, fully mix the bamboo charcoal suspension with the down and then dry it to obtain down with bamboo charcoal nano powder. The spraying time of the down spray drying system is 30 minutes, the drying temperature is 120°C, and the drying time is 15 minutes.

[0010] Powder removal stage: The bamboo charcoal powder in the down with bamboo charcoal nano powder is removed by a dust removal machine to obtain bamboo charcoal down.

[0011] The present invention also discloses a down spray drying system, which includes a spray dryer, wherein a spray chamber and a drying chamber are arranged inside the spray dryer, wherein a feed port for feeding is arranged above the spray chamber, at least two spray assemblies are installed above the interior of the spray chamber, a cylindrical structure is adopted at the lower interior of the spray chamber, and a scraping assembly is arranged in the cylindrical structure, and the spray chamber and the drying chamber are connected through a connecting channel.

[0012] As a further description of the above technical solution: a liquid supply box for providing bamboo charcoal suspension to the spray assembly is installed on the top of the spray dryer, and the liquid supply box supplies liquid to the spray assembly through a pump and a pipeline, a heat exchange tube group is installed inside the liquid supply box, an exhaust pipe is installed on one side of the drying chamber, and the exhaust pipe is connected to the heat exchange tube group, wherein a liquid filling pipe joint for replenishing liquid and an exhaust hood connected to the heat exchange tube group are installed on the top of the liquid supply box.

[0013] As a further description of the above technical solution: the spray assembly includes a spray frame and a spray head, wherein an inwardly recessed assembly groove is opened in the spray frame along the length direction, and a plurality of the spray heads are installed in the inwardly recessed assembly groove in a linear array, and an upper arc surface is provided on the lower surface of the inwardly recessed assembly groove corresponding to the spray path of the spray head.

[0014] As a further description of the above technical solution: the scraper assembly includes a rotating shaft and a plurality of scrapers distributed in a circular array around the rotating shaft, wherein the scraper is in contact with the inner wall of the spray chamber, the scraper is fixedly connected to the rotating shaft by a connecting rod, and a motor is installed on the outside of the spray dryer and is transmission-connected to one end of the rotating shaft.

[0015] As a further description of the above technical solution: the spray chamber has a down transfer port on one side close to the connecting channel, and a sealing plate that matches the spray chamber is installed on the down transfer port. An installation cavity is opened inside the spray dryer at the same horizontal position as the down transfer port, and a second hydraulic rod is installed in the installation cavity. The piston rod end of the second hydraulic rod is fixedly connected to the sealing plate, so that the second hydraulic rod can control the movement of the sealing plate.

[0016] As a further description of the above technical solution: an air supply chamber and a hot air chamber are provided inside the spray dryer below the drying chamber, wherein the air supply chamber is located above the hot air chamber, and the air supply chamber is located above the hot air chamber and is interconnected with the hot air chamber, an air inlet is provided on one side of the spray dryer at the hot air chamber, an electric heating device is installed in the hot air chamber, and the air can be heated by the electric heating device, a mesh plate is provided between the air supply chamber and the drying chamber, and a hair dryer group is provided in the air supply chamber, and the heated air can be blown into the drying chamber by the hair dryer group.

[0017] As a further description of the above technical solution: a collecting chamber is arranged above the drying chamber inside the spray dryer, wherein a down collecting channel is arranged between the drying chamber and the collecting chamber, a baffle which can be opened and closed is installed in the down collecting channel, a cavity is opened on one side of the down collecting channel inside the spray dryer, a first hydraulic rod is installed in the cavity, a piston rod of the first hydraulic rod is connected to the baffle in the down collecting channel, and a down outlet pipe communicating with the collecting chamber is arranged at the collecting chamber outside the spray dryer.

[0018] As a further description of the above technical solution: a liquid collecting chamber is provided inside the spray dryer below the spray chamber, a porous mesh structure is adopted between the spray chamber and the liquid collecting chamber, a liquid level gauge capable of monitoring the liquid level in the liquid collecting chamber is installed inside the liquid collecting chamber, and a drain pipe is connected to the bottom of the liquid collecting chamber.

[0019] As a further description of the above technical solution: a backwash mechanism is installed inside the liquid collection chamber, and the backwash mechanism includes a carrier frame and a backwash frame installed above the carrier frame, wherein a nozzle is installed on the top of the backwash frame, and a pump for supplying liquid to the nozzle is installed in the liquid collection chamber, a slide rail groove is opened above the carrier frame along the length direction, and a slide rail matched with the slide rail groove is arranged inside the backwash frame, and a strip groove is also opened above the carrier frame along the length direction, and a boss is installed at the position inside the strip groove below the backwash frame, and a lead screw nut is embedded in the boss, and a lead screw is rotatably installed inside the liquid collection chamber in the length direction of the strip groove, and the lead screw is matched with the lead screw nut and is connected with each other, and a first drive motor for driving the lead screw to rotate is installed outside the spray dryer.

[0020] In the above technical scheme, the present invention provides a method for preparing bamboo charcoal down and a down spray drying system thereof. The present invention composites bamboo charcoal with down to make the down have the effects of deodorization, moisture absorption, and rapid temperature rise. The present invention also designs a spray drying system used when the bamboo charcoal and down are composited to make the composite effect of the down and bamboo charcoal better, thereby improving the overall quality and efficacy of the down.

[0021] In the down spray drying system of the present invention, when the hot and humid air is discharged from the drying chamber through the exhaust pipe during drying, it is connected to the heat exchange pipe group inside the liquid supply box through the pipeline, so that the heat energy in the hot air can be transferred to the bamboo charcoal suspension liquid in the liquid supply box through the heat exchange pipe group, so that the secondary utilization of heat energy can be achieved. Therefore, the system has the advantages of strong energy saving and the ability to increase the fusion speed of bamboo charcoal and down;

[0022] In the down spray drying system of the present invention, a liquid collecting chamber is provided inside the spray dryer below the spray chamber, and a porous mesh structure is adopted between the spray chamber and the liquid collecting chamber so that excess bamboo charcoal suspension can flow into the liquid collecting chamber through the mesh holes, thereby avoiding the situation where too much bamboo charcoal suspension is concentrated at the bottom of the spray chamber to soak the down, resulting in a decrease in the performance of the down, and a backwash mechanism is installed inside the liquid collecting chamber, through which the porous mesh structure at the bottom of the spray chamber can be regularly sprayed back to achieve the effect of self-clearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 A preparation flow chart of a method for preparing bamboo charcoal down provided by the present invention;

[0025] Figure 2 The overall structure of a down spray drying system provided by the present invention is schematically shown. Figure 1 ;

[0026] Figure 3 The overall structure of a down spray drying system provided by the present invention is schematically shown. Figure 2 ;

[0027] Figure 4 A schematic diagram of the internal structure of a down spray drying system provided by the present invention Figure 1 ;

[0028] Figure 5 A schematic diagram of the internal structure of a down spray drying system provided by the present invention Figure 2 ;

[0029] Figure 6 A front schematic diagram of the internal structure of a down spray drying system provided by the present invention;

[0030] Figure 7 A schematic diagram of the structure of a spray component in a down spray drying system provided by the present invention;

[0031] Figure 8 A schematic diagram of a backwash mechanism in a down spray drying system provided by the present invention;

[0032] Fig. 9 This is a schematic diagram of the structure of a liquid supply box in a down spray drying system provided by the present invention.

[0033] Description of the drawings: 1. Spray dryer; 2. Spray chamber; 20. Spray assembly; 200. Spray head; 201. Spray rack; 202. Inner concave assembly groove; 203. Upper arc surface; 21. Scraper assembly; 210. Rotating shaft; 211. Scraper; 212. Motor; 22. Closing plate; 23. Down transfer port; 3. Hot air chamber; 30. Air inlet; 31. Electric heating device; 4. Air supply chamber; 40. Hair dryer group; 5. Drying chamber; 50. Exhaust pipe; 51. Screen; 6. Collection chamber; 60. Down collection channel; 61. Baffle; 62. First hydraulic rod; 6 3. Cavity; 64. Down pipe; 7. Liquid collecting chamber; 70. Backwash mechanism; 700. First drive motor; 701. Carrying frame; 702. Backwashing frame; 703. Nozzle; 704. Slide rail; 705. Slide rail groove; 706. Screw rod; 707. Boss; 708. Strip groove; 709. Pump; 71. Liquid level gauge; 72. Liquid discharge pipe; 8. Connecting channel; 80. Conveyor belt; 81. Second drive motor; 9. Installation cavity; 90. Second hydraulic rod; 10. Liquid supply box; 100. Liquid adding pipe joint; 101. Exhaust hood; 102. Heat exchange tube group. DETAILED DESCRIPTION

[0034] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, and use. It should be understood that in all of these figures, the same or similar reference numerals indicate the same or similar parts and features. The various drawings only schematically represent the concepts and principles of the embodiments of the present disclosure, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present disclosure. Specific parts in specific drawings may be exaggerated to illustrate the relevant details or structures of the embodiments of the present disclosure.

[0035] Example 1

[0036] like Figure 1 As shown, this embodiment provides a technical solution: a method for preparing bamboo charcoal down, the specific steps are as follows:

[0037] S1, preparation stage: preparing a suspension of down and bamboo charcoal, wherein the down is washed down, and the bamboo charcoal suspension is a suspension obtained by fully stirring and mixing water and bamboo charcoal nanopowder in a ratio of 100:1-2;

[0038] S2, spray drying stage: spray the bamboo charcoal suspension onto the down through the down spray drying system, fully mix the bamboo charcoal suspension with the down and then dry it to obtain the down with bamboo charcoal nano powder, wherein the spraying time of the down spray drying system is 30 minutes, the drying temperature is 120°C, and the drying time is 15 minutes;

[0039] S3, powder removal stage: removing bamboo charcoal powder from the down with bamboo charcoal nano powder by a dust collector to obtain bamboo charcoal down;

[0040] It should be noted that: since bamboo charcoal has a strong adsorption capacity, it has the effects of purifying the air, eliminating odors, absorbing moisture and preventing mildew, and inhibiting bacteria and insects. Based on this, the present invention combines bamboo charcoal with down to make the down have the effects of deodorizing, absorbing moisture, and quickly heating up. In addition, the present invention designs a spray drying system used when combining bamboo charcoal and down to make the composite effect of down and bamboo charcoal better, thereby improving the overall quality and efficacy of the down.

[0041] Example 2

[0042] like Figure 2 - Fig. 9 As shown, this embodiment provides a down spray drying system, which includes a spray dryer 1, a spray chamber 2 and a drying chamber 5 are provided inside the spray dryer 1, wherein a feeding port for feeding is provided above the spray chamber 2, at least two spray assemblies 20 are installed above the spray chamber 2, the lower part of the spray chamber 2 adopts a cylindrical structure, and a scraper assembly 21 is provided in the cylindrical structure, and the scraper assembly 21 can stir the down when the spray assembly 20 sprays the down, so that the down is in the spray chamber 2. The spray chamber 2 is fully mixed with the bamboo charcoal suspension, and the spray chamber 2 is connected to the drying chamber 5 through the connecting channel 8. In summary, the down spray drying system as a whole adopts an integrated structure machine. During the production and preparation process of bamboo charcoal down, the bamboo charcoal down can be directly sprayed and dried through the system, achieving the effect of one machine for multiple uses, reducing the production cost and occupied space of the equipment, and this integrated structure machine, in the actual preparation of bamboo charcoal down, the journey from the spraying stage of the down to the drying stage of the down is shorter, so that the preparation efficiency is effectively improved.

[0043] Specifically, Figure 2 and Fig. 9 As shown, considering that when the down is dried with hot air in the drying chamber 5, the exhausted wind contains a large amount of heat energy, and when the bamboo charcoal down is sprayed, the bamboo charcoal suspension has a certain temperature and can be integrated with the down faster and better. Based on this, in this embodiment, a liquid supply box 10 for providing bamboo charcoal suspension to the spray assembly 20 is installed on the top of the spray dryer 1. The liquid supply box 10 supplies liquid to the spray assembly 20 through a pump and a pipeline. A heat exchange tube group 102 is installed inside the liquid supply box 10. An exhaust pipe 50 is installed on one side of the drying chamber 5. The exhaust pipe 50 and the heat exchange tube The liquid supply box 10 is connected with the heat exchange tube group 102, wherein a liquid filling pipe joint 100 for replenishing liquid and an exhaust hood 101 connected with the heat exchange tube group 102 are installed on the top of the liquid supply box 10. Therefore, when the hot and humid air is discharged from the drying chamber 5 by the exhaust pipe 50, it can enter the heat exchange tube group 102 inside the liquid supply box 10, so that the heat energy in the hot air can be transferred to the bamboo charcoal suspension in the liquid supply box 10 through the heat exchange tube group 102, so that the secondary utilization of heat energy can be achieved. Therefore, the system has the advantages of strong energy saving and the ability to increase the fusion speed of bamboo charcoal and down.

[0044] Specifically, Figure 4 , Figure 5 and Figure 7 As shown, in order to enable the sprayed bamboo charcoal suspension to be sprayed on the down with sufficient fineness and scattering, and to increase the fusion speed between the bamboo charcoal suspension and the down, in this embodiment, the spray assembly 20 includes a spray frame 201 and a spray head 200, wherein the spray frame 201 is provided with an inner concave assembly groove 202 along the length direction, and a plurality of spray heads 200 are installed in the inner concave assembly groove 202 in a linear array, and the lower surface of the inner concave assembly groove 202 is provided with an upper arc surface 203 corresponding to the spray path of the spray head 200, so that When the nozzle 200 is spraying, the sprayed bamboo charcoal suspension can be sprayed on the upper arc surface 203 first, and then splashed through the upper arc surface 203 to spray on the down. This can not only ensure the contact effect between the bamboo charcoal suspension and the down, but also avoid the loss of down caused by the excessive spraying speed of the bamboo charcoal suspension, thereby improving the quality of the down. Furthermore, in order to prevent the spray component 20 from hindering the falling of the down, the top surface of the spray frame 201 adopts an inclined slope structure, so that the down can slide down after falling on it, thereby ensuring the addition of the down.

[0045] Specifically, Figure 1 and Figure 4 As shown, in order to allow the down to fully contact with the sprayed bamboo charcoal suspension during the spraying process, in this embodiment, the scraper assembly 21 includes a rotating shaft 210 and a plurality of scrapers 211 distributed in a circular array around the rotating shaft 210, wherein the scraper 211 contacts the inner wall of the spray chamber 2, and the scraper 211 is fixedly connected to the rotating shaft 210 via a connecting rod. A motor 212 is installed on the outside of the spray dryer 1 and is transmission-connected to one end of the rotating shaft 210. Therefore, during the spraying process, the rotating shaft 210 is driven to rotate by the motor 212, so that the scraper 211 stirs the down in the spray chamber 2, so that the down is fully contacted and fused with the bamboo charcoal suspension.

[0046] Specifically, Figure 4 - Figure 6As shown, in order to facilitate the transfer of the down that has been sprayed to the drying chamber 5, in this embodiment, the spray chamber 2 has a down transfer port 23 on one side close to the connecting channel 8, and a sealing plate 22 that matches the spray chamber 2 is installed on the down transfer port 23. An installation cavity 9 is opened at the same horizontal position of the down transfer port 23 inside the spray dryer 1, and a second hydraulic rod 90 is installed in the installation cavity 9. The piston rod end of the second hydraulic rod 90 is fixedly connected to the sealing plate 22, so that the second hydraulic rod 90 can realize the opening and closing of the down transfer port 23 by controlling the movement of the sealing plate 22. The spray dryer 1 is a body, a conveyor belt 80 is installed inside the connecting channel 8, and a second drive motor 81 for driving the conveyor belt 80 is installed outside the spray dryer 1. When the second hydraulic rod 90 controls the sealing plate 22 to move to close the down transfer port 23, the internal space of the spray chamber 2 is closed to spray the down. When the spraying time arrives, the second hydraulic rod 90 controls the sealing plate 22 to move to open the down transfer port 23. At this time, under the action of the scraper assembly 21, the wet down is scraped from the down transfer port 23 to the conveyor belt 80, and is transported to the drying chamber 5 through the conveyor belt 80 for drying.

[0047] Specifically, Figure 1 - Figure 6 As shown, in order to dry the down, in this embodiment, an air supply chamber 4 and a hot air chamber 3 are provided inside the spray dryer 1 below the drying chamber 5, wherein the air supply chamber 4 is located above the hot air chamber 3, and the air supply chamber 4 is located above the hot air chamber 3 and is interconnected with the hot air chamber 3. An air inlet 30 is provided on one side of the spray dryer 1 at the hot air chamber 3, an electric heating device 31 is installed in the hot air chamber 3, and the air can be heated by the electric heating device 31, a mesh plate 51 is provided between the air supply chamber 4 and the drying chamber 5, and a hair dryer group 40 is provided in the air supply chamber 4, and the heated air can be blown into the drying chamber 5 by the hair dryer group 40, so as to achieve the effect of drying the down in the drying chamber 5.

[0048] Specifically, Figure 1 - Figure 6As shown, in order to collect the dried down, in this embodiment, a collection chamber 6 is provided above the drying chamber 5 inside the spray dryer 1, wherein a down collection channel 60 is provided between the drying chamber 5 and the collection chamber 6, and a baffle 61 capable of opening and closing is installed in the down collection channel 60. A cavity 63 is provided on one side of the down collection channel 60 inside the spray dryer 1, and a first hydraulic rod 62 is installed in the cavity 63. The piston rod of the first hydraulic rod 62 is connected to the baffle 61 in the down collection channel 60, so that the baffle 61 can be controlled to open and close the down collection channel 60. A down collection channel 60 is provided outside the spray dryer 1 at the collection chamber 6. The down outlet pipe 64 is connected to the collecting chamber 6, and a negative pressure fan (not shown in the figure) and a down blocking net that can be opened and closed are installed in the down outlet pipe 64 (when the down blocking net is opened, the down outlet pipe 64 is connected, and the down can enter the down outlet pipe 64; when the down blocking net is closed, the down outlet pipe 64 is blocked, and the down is blocked in the collecting chamber 6). When the down in the drying chamber 5 is dried, the down blocking net is closed, the down collecting channel 60 is opened, and the negative pressure fan is turned on, so that negative pressure is formed in the collecting chamber 6, and the down is sucked into the collecting chamber 6 from the down collecting channel 60 for collection. When the down needs to be discharged, the down blocking net is opened, the down outlet pipe 64 is connected, and the down is discharged from the down outlet pipe 64.

[0049] Specifically, Figure 2 - Figure 8 As shown, in order to prevent the accumulation of too much sprayed bamboo charcoal suspension at the bottom of the spray chamber 2 during the spraying process, so that the down is immersed in the suspension and the quality of the down is reduced, in this embodiment, a liquid collection chamber 7 is provided inside the spray dryer 1 below the spray chamber 2, a porous mesh structure is adopted between the spray chamber 2 and the liquid collection chamber 7, a liquid level gauge 71 capable of monitoring the liquid level in the liquid collection chamber 7 is installed inside the liquid collection chamber 7, and a drain pipe 72 is connected to the bottom of the liquid collection chamber 7. Such a structural arrangement allows excess bamboo charcoal suspension to flow into the liquid collection chamber 7 through the mesh holes, thereby avoiding the situation where too much bamboo charcoal suspension is concentrated at the bottom of the spray chamber 2 to soak the down.

[0050] Furthermore, if Figure 2 - Figure 8As shown, in order to prevent the porous mesh structure between the spray chamber 2 and the liquid collection chamber 7 from being blocked and affecting the bamboo charcoal suspension from entering the liquid collection chamber 7, in this embodiment, a backwash mechanism 70 is installed inside the liquid collection chamber 7, and the backwash mechanism 70 includes a carrier frame 701 and a backwash frame 702 installed above the carrier frame 701, wherein a nozzle 703 is installed on the top of the backwash frame 702, and a pump 709 for supplying liquid to the nozzle 703 is installed in the liquid collection chamber 7, a slide rail groove 705 is opened above the carrier frame 701 along the length direction, and a slide rail 704 adapted to the slide rail groove 705 is arranged inside the backwash frame 702, and a strip groove 708 is also opened above the carrier frame 701 along the length direction, and the strip groove 708 is located below the backwash frame 702. A boss 707 is installed at the internal position of 08, and a lead screw nut is embedded in the boss 707. A lead screw 706 is rotatably installed inside the liquid collection chamber 7 in the length direction of the groove 708. The lead screw 706 and the lead screw nut are adapted and sleeved with each other. A first drive motor 700 for driving the lead screw 706 to rotate is installed outside the spray dryer 1. When the pump 709 and the first drive motor 700 are running, the pump 709 delivers the liquid in the liquid collection chamber 7 into the nozzle 703 through the pipeline, and the first drive motor 700 drives the recoil frame 702 to move along the length direction on the carrier 701 through the lead screw 706 and the lead screw nut, so that the nozzle 703 sprays back to clear the hole mesh structure at the bottom of the spray chamber 2.

[0051] The exemplary implementation scheme of the present disclosure is described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present disclosure can be combined in various ways without exceeding the protection scope of the present disclosure, which is determined by the attached claims.

Claims

1. A method for preparing bamboo charcoal down, characterized in that: The specific steps are as follows: Preparation stage: preparing a suspension of down and bamboo charcoal, wherein the down is washed down, and the bamboo charcoal suspension is a suspension of water and bamboo charcoal nanopowder mixed in a ratio of 100:1-2; Spray drying stage: Spray the bamboo charcoal suspension onto the down through the down spray drying system, fully mix the bamboo charcoal suspension with the down and then dry it to obtain down with bamboo charcoal nano powder. The spraying time of the down spray drying system is 30 minutes, the drying temperature is 120°C, and the drying time is 15 minutes. Powder removal stage: The bamboo charcoal powder in the down with bamboo charcoal nano powder is removed by a dust removal machine to obtain bamboo charcoal down.

2. A down spray drying system used in the method for preparing bamboo charcoal down as claimed in claim 1, characterized in that: The down spray drying system comprises a spray dryer (1), wherein a spray chamber (2) and a drying chamber (5) are provided inside the spray dryer (1), wherein a feed port for feeding is provided above the spray chamber (2), at least two spray assemblies (20) are installed above the spray chamber (2), the lower part of the spray chamber (2) adopts a cylindrical structure, and a scraping assembly (21) is provided inside the cylindrical structure, and the spray chamber (2) and the drying chamber (5) are connected via a connecting channel (8).

3. The down spray drying system according to claim 2, characterized in that: A liquid supply box (10) for supplying bamboo charcoal suspension to a spray assembly (20) is installed on the top of the spray dryer (1); the liquid supply box (10) supplies liquid to the spray assembly (20) via a pump and a pipeline; a heat exchange tube group (102) is installed inside the liquid supply box (10); an exhaust pipe (50) is installed on one side of the drying chamber (5); the exhaust pipe (50) is connected to the heat exchange tube group (102); wherein a liquid supply pipe joint (100) for replenishing liquid and an exhaust hood (101) connected to the heat exchange tube group (102) are installed on the top of the liquid supply box (10).

4. The down spray drying system according to claim 2, characterized in that: The spray assembly (20) comprises a spray frame (201) and a spray head (200), wherein an inner concave assembly groove (202) is provided in the spray frame (201) along the length direction, a plurality of the spray heads (200) are installed in the inner concave assembly groove (202) in a linear array, and an upper arc surface (203) is provided on the lower surface of the inner concave assembly groove (202) corresponding to the spray path of the spray head (200).

5. The down spray drying system according to claim 2, characterized in that: The scraper assembly (21) comprises a rotating shaft (210) and a plurality of scrapers (211) distributed in a circular array around the rotating shaft (210), wherein the scrapers (211) are in contact with the inner wall of the spray chamber (2), the scrapers (211) are fixedly connected to the rotating shaft (210) via a connecting rod, and a motor (212) drivingly connected to one end of the rotating shaft (210) is installed outside the spray dryer (1).

6. The down spray drying system according to claim 2, characterized in that: The spray chamber (2) has a down transfer port (23) on one side close to the connecting passage (8), and a sealing plate (22) that matches the spray chamber (2) is installed on the down transfer port (23). An installation cavity (9) is provided inside the spray dryer (1) at the same horizontal position as the down transfer port (23), and a second hydraulic rod (90) is installed in the installation cavity (9). The piston rod end of the second hydraulic rod (90) is fixedly connected to the sealing plate (22), so that the second hydraulic rod (90) can control the movement of the sealing plate (22).

7. The down spray drying system according to claim 2, characterized in that: The spray dryer (1) is provided with an air supply chamber (4) and a hot air chamber (3) located below the drying chamber (5), wherein the air supply chamber (4) is located above the hot air chamber (3), and the air supply chamber (4) and the hot air chamber (3) are connected to each other; an air inlet (30) is provided on one side of the spray dryer (1) located at the hot air chamber (3); an electric heating device (31) is installed in the hot air chamber (3), and air can be heated by the electric heating device (31); a mesh plate (51) is provided between the air supply chamber (4) and the drying chamber (5); a blower group (40) is provided in the air supply chamber (4), and heated air can be blown into the drying chamber (5) by the blower group (40).

8. The down spray drying system according to claim 2, characterized in that: A collecting chamber (6) is arranged above the drying chamber (5) inside the spray dryer (1), wherein a down collecting channel (60) is arranged between the drying chamber (5) and the collecting chamber (6), and a baffle (61) capable of being opened and closed is installed in the down collecting channel (60). A cavity (63) is provided on one side of the down collecting channel (60) inside the spray dryer (1), and a first hydraulic rod (62) is installed in the cavity (63), and a piston rod of the first hydraulic rod (62) is connected to the baffle (61) in the down collecting channel (60). A down outlet pipe (64) communicating with the collecting chamber (6) is arranged outside the spray dryer (1) and located at the collecting chamber (6).

9. The down spray drying system according to claim 2, characterized in that: A liquid collecting chamber (7) is provided inside the spray dryer (1) below the spray chamber (2); a porous mesh structure is used between the spray chamber (2) and the liquid collecting chamber (7); a liquid level meter (71) capable of monitoring the liquid level in the liquid collecting chamber (7) is installed inside the liquid collecting chamber (7); and a drain pipe (72) is connected to the bottom of the liquid collecting chamber (7).

10. The down spray drying system according to claim 9, characterized in that: A backwash mechanism (70) is installed inside the liquid collection chamber (7), and the backwash mechanism (70) comprises a support frame (701) and a backwash frame (702) installed above the support frame (701), wherein a nozzle (703) is installed on the top of the backwash frame (702), and a pump (709) for supplying liquid to the nozzle (703) is installed in the liquid collection chamber (7), a slide rail groove (705) is opened above the support frame (701) along the length direction, and a slide rail (704) adapted to the slide rail groove (705) is provided inside the backwash frame (702), A groove (708) is also provided above the carrier (701) along the length direction, a boss (707) is installed below the return frame (702) at an internal position of the groove (708), a lead screw nut is embedded in the boss (707), a lead screw (706) is rotatably installed inside the liquid collecting chamber (7) along the length direction of the groove (708), the lead screw (706) is adapted to and sleeved with the lead screw nut, and a first drive motor (700) for driving the lead screw (706) to rotate is installed outside the spray dryer (1).

Images