Hot air drying device for biomass fuel

Abstract

The invention relates to a biomass fuel hot air drying device, and relates to the technical field of biomass fuels, the hot air drying device comprises a box body, a feeding pipe, a first partition plate, a second partition plate, a spiral conveying mechanism and a hot air drying mechanism, the partition plate I and the partition plate II are matched with the box body to form a first cavity, a second cavity, a third cavity and a material passing space; the spiral conveying mechanism is used for stirring and conveying powder, and the hot air drying mechanism inputs hot air into the first cavity and the third cavity and outputs the hot air from the second cavity. Powder is stirred and conveyed through the spiral conveying mechanism, the hot air drying mechanism is started to input hot air into the box body, the interior of the box body is in a closed state, the moving path of the hot air is prolonged through the design of the first cavity, the second cavity and the third cavity, and the drying effect and efficiency of the powder are improved; and the energy consumption and the risk of thermal pollution to the environment are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of biomass fuel, and in particular to a hot air drying device for biomass fuel. Background Art

[0002] Biomass fuel is a kind of biomass resource. In the process of producing biomass fuel into finished biomass particles, the raw materials need to be crushed into powder first, and then the powder is dried to evaporate the moisture in the solid particles, and finally extruded into shape. Therefore, in the process of making the finished product, a drying device will be used for drying.

[0003] In the prior art, when a drying device is drying, the powder is generally added to a conveyor belt for transportation, and then the powder on the conveyor belt is dried by the heat generated by the electric heating plate. However, since the moisture in the powder is easy to cause the powder to clump, it is difficult to dry the inside of the agglomerated powder when it is transported on the conveyor belt for drying. Even if drying is performed, the time spent on drying will be greatly prolonged, reducing the drying effect and efficiency. At the same time, the heat generated by the electric heating plate is easily dissipated into the air, resulting in a large amount of energy consumption and easily causing thermal pollution to the environment. Summary of the invention

[0004] In order to improve the drying effect and efficiency and reduce energy consumption and thermal pollution to the environment, the present application provides a biomass fuel hot air drying device.

[0005] In the first aspect, the present application provides a biomass fuel hot air drying device, which adopts the following technical solution: A biomass fuel hot air drying device, comprising a box, a feeding pipe, a first partition plate, a second partition plate, a spiral conveying mechanism and a hot air drying mechanism, wherein the feeding pipe is arranged on the box and is used to add powder into the box, the first partition plate and the second partition plate are arranged on the inner wall of the box body at intervals from top to bottom and cooperate with the box body to form a first chamber, a second chamber and a third chamber arranged from top to bottom, and a material passing space connecting the first chamber, the second chamber and the third chamber is formed between the first partition plate and the second partition plate away from one end of the feeding pipe and the inner wall of the box body; The spiral conveying mechanism is respectively against the partition plate 1 and the bottom wall of the box body and is respectively used for stirring and conveying the powder in the first chamber and the third chamber, and the conveying directions of the two are opposite. The hot air drying mechanism inputs hot air from one end of the first chamber and the third chamber away from the material passing space and outputs hot air from one end of the second chamber away from the material passing space.

[0006] By adopting the above technical scheme, powder is added into the first chamber through the feeding pipe, the spiral conveying mechanism is started to stir and convey the powder, and at the same time, the hot air drying mechanism inputs hot air into the first chamber, and the movement of the hot air drives the movement of the powder, and the powder moves from the first chamber to the material passing space and falls downward to the third chamber, and the spiral conveying mechanism in the third chamber continues to stir and convey the powder, and at the same time, hot air is input into the third chamber to continue to dry the powder, and the moisture in the powder evaporates to form water vapor, and the hot air and water vapor in the first chamber and the third chamber simultaneously enter the second chamber and are output, and the powder is output through the third chamber, so as to achieve drying of the powder.

[0007] The powder is stirred and conveyed by the spiral conveying mechanism, and the hot air drying mechanism is started to input hot air into the box, so that the powder is stirred and conveyed in this way, thereby improving the drying effect and efficiency of the powder; the box is in a closed state, and the design of the first chamber, the second chamber, and the third chamber allows the gas to form a tortuous movement path, and fully utilizes the structure of the box to greatly extend the movement path of the hot air, while reducing the risk of hot air directly escaping into the external environment, allowing the hot air to stay and form a certain air pressure, thereby greatly improving the drying effect and efficiency of the powder, thereby further improving the drying effect and efficiency of the powder, and reducing the risk of heat dissipation to the external environment, reducing energy consumption and the risk of thermal pollution to the environment.

[0008] At the same time, the hot air introduced into the first chamber can be blown toward the powder falling downward through the feeding pipe, thereby further improving the drying effect and efficiency of the powder, and the hot air located in the third chamber is in the opposite direction of the movement of the powder, that is, the entering hot air pushes the hot air moving with the powder to move toward the second chamber, further improving the drying effect of the powder, and further reducing the probability of the hot air escaping to the outside of the box along with the powder, thereby further improving the drying effect and efficiency of the powder, and also reducing the risk of heat dissipation to the external environment, reducing energy consumption and the risk of thermal pollution to the environment.

[0009] Optionally, the spiral conveying mechanism includes: Two stirring rods are rotatably mounted on the box body and extend into the first chamber and the second chamber respectively; Two spiral blades are respectively arranged on the two stirring rods and are positioned against an upper surface of the partition plate and the bottom of the box body, and the spiral blades are rotated to stir and transport the powder; The driving assembly is arranged on the box body and is used for driving the two stirring rods to rotate simultaneously and in opposite directions.

[0010] By adopting the above technical solution, the driving component starts to drive the stirring rod to rotate, and the rotation of the stirring rod drives the spiral piece to rotate, and the rotation of the spiral piece is used to stir and convey the powder.

[0011] Optionally, the driving component includes: A driving motor, used for driving the stirring rod to rotate; Two driving gears are arranged on the two stirring rods and mesh with each other.

[0012] By adopting the above technical solution, the driving motor starts to drive the stirring rod to rotate, and the rotation of the stirring rod drives the driving gear connected to it to rotate, thereby driving another driving gear and another stirring rod to rotate, thereby achieving driving the two stirring rods and two spiral blades to rotate simultaneously and in opposite directions.

[0013] Optionally, the hot air drying mechanism includes: An air intake assembly is arranged on the box body and is used to introduce hot air into the first chamber and the third chamber at one end away from the material passing space, and a plurality of drying holes connected to the air intake assembly are evenly opened on the stirring rod and the spiral sheet; An air outlet pipe is arranged on the box body and is connected to an end of the second chamber away from the material passing space and is used to output hot air; The processing component is arranged on the air outlet pipe and is used for absorbing, filtering and collecting the moisture and powder in the gas and re-inputting the hot air into the air intake component.

[0014] By adopting the above technical scheme, the air intake component inputs hot air into the first chamber and the third chamber at one end away from the material passing space. The hot air entering the first chamber can be directly blown to the powder added downward through the feeding pipe. At the same time, the hot air output through the drying hole can dry the stirred and transported powder. As more hot air enters, the hot air enters the second chamber through the material passing space; part of the hot air enters the third chamber through the material passing space, and the hot air entering the third chamber can continue to dry the powder. At the same time, the hot air can also push the hot air in the third chamber into the second chamber, and then the hot air and powder enter the processing component through the air outlet pipe. The processing component absorbs and filters and collects moisture and powder, and then the hot air re-enters the air intake component for recycling, thereby improving the drying effect and efficiency of the powder, and reducing the risk of heat dissipation to the external environment, reducing energy consumption and the risk of thermal pollution to the environment.

[0015] Optionally, the air intake assembly includes: Two air inlet hoods are arranged on the box body and are respectively located at one end of the two stirring rods away from the material passing space and are connected to the drying hole. The box body is provided with air vents connecting the two air inlet hoods with the first chamber and the third chamber; Two air inlet pipes are arranged on the two air inlet covers and are used to input heated air; The heating element is arranged in the two air inlet hoods and is used for heating the gas.

[0016] By adopting the above technical solution, hot air enters the air intake hood through the air intake pipe, and then the heating element heats the hot air again and inputs it into the first chamber and the third chamber through the vents. Some of the hot air is blown out through the drying holes. At the same time, the reflux air can continue to be heated and recycled by the heating element, thereby achieving drying of the powder.

[0017] Optionally, the processing component includes: A processing box, located on one side of the box body; A processing plate is arranged on the inner side wall of the processing box and divides the processing box into a processing chamber 1 and a processing chamber 2 arranged up and down, one end of the processing plate cooperates with the inner side wall of the processing box to form a connecting chamber connecting the processing chamber 1 and the processing chamber 2, and the air outlet pipe is connected with an end of the processing chamber 2 away from the connecting chamber; An activated carbon plate is detachably mounted on the processing plate and is located in the processing chamber 1 and is used to absorb dust and moisture in the gas; The return pipe is arranged on the processing box and is connected with one end of the processing chamber away from the connecting chamber and is connected with the air inlet hood. The return pipe is provided with a one-way valve that only allows gas to enter the air inlet hood.

[0018] By adopting the above technical scheme, hot air, moisture and powder enter the processing chamber two, and then the powder and moisture are precipitated downward and removed, and then the remaining powder and moisture move up with the air through the connecting chamber into the processing chamber one, and then the powder and moisture continue to be precipitated on the processing plate, and then the powder and moisture continue to be removed through the activated carbon plate, and finally the air flows back to the hot air hood through the reflux pipe for utilization. At the same time, the design of the processing chamber one and the processing chamber two can greatly improve the removal effect of the powder and moisture, and improve the drying effect and efficiency of the powder.

[0019] Optionally, a processing hole is opened on the processing box, and a collection box is slidably installed on the processing hole, which extends into the second processing chamber and is used to collect precipitated moisture and powder. The collection box is provided with a positioning plate that rests on the processing box, and the processing plate is arranged on the positioning plate and extends into the processing box through the processing hole.

[0020] By adopting the above technical solution, the collection box collects the precipitated powder and moisture, and the processing plate can also collect the precipitated powder and moisture. By pulling the positioning plate to move, the processing plate and the collection box can be removed for cleaning, and the activated carbon plate can be replaced at the same time, which further improves the removal effect of powder and moisture, thereby improving the drying effect and efficiency of the powder.

[0021] Optionally, the material passing space located at the second partition plate is larger than the material passing space located at the first partition plate.

[0022] By adopting the above technical solution, it is easier for the powder to fall downwards and for the hot air to enter the second chamber for transportation.

[0023] Optionally, the box body is further provided with a discharging mechanism, and the discharging mechanism comprises: A discharge box is arranged on the box body and is connected to an end of the third chamber away from the material passing space, and a discharge port for discharging powder is provided at the bottom of the discharge box; The control component is used to control the opening or closing of the discharge port.

[0024] By adopting the above technical scheme, the powder falls downward into the discharge box after drying. The powder falling into the discharge box can push the hot air entering the discharge box into the second chamber, and the subsequent powder entering can squeeze the powder in the discharge box. When the discharge box is full of powder, the control component starts to open the discharge port, and the powder in the discharge box is discharged through the discharge port, and then the control component starts to close the discharge port. The time spent on powder output is less, thereby greatly reducing the risk of hot air drifting into the external environment, further improving the drying effect and efficiency of the powder, and also reducing the risk of heat dissipation into the external environment, reducing energy consumption and the risk of thermal pollution to the environment.

[0025] Optionally, the control component includes: Two control doors are arranged on the discharge box for sliding toward each other and are used to cooperate in opening or closing the discharge port; A control component is used to drive the two control doors to move.

[0026] By adopting the above technical solution, the control component drives the two control doors to move away from and towards each other, thereby realizing opening or closing of the discharge port.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: 1. The powder is stirred and conveyed by the spiral conveying mechanism, and the hot air drying mechanism is started to input hot air into the box, so that the powder is stirred and conveyed in this way, thereby improving the drying effect and efficiency of the powder; the box is in a closed state, and the design of the first chamber, the second chamber, and the third chamber allows the gas to form a tortuous movement path, making full use of the structure of the box to greatly extend the movement path of the hot air, while reducing the risk of hot air directly escaping into the external environment, thereby improving the drying effect and efficiency of the powder, and reducing the risk of heat dissipation to the external environment, thereby reducing energy consumption and the risk of thermal pollution to the environment.

[0028] 2. The hot air entering the first chamber can be blown toward the powder falling downward through the feeding pipe, and the hot air in the third chamber is in the opposite direction of the movement of the powder, pushing the hot air moving with the powder to move toward the second chamber, further improving the drying effect of the powder, and further reducing the probability of hot air escaping to the outside of the box with the powder, thereby further improving the drying effect and efficiency of the powder, reducing the risk of heat dissipation to the external environment, and reducing energy consumption and the risk of thermal pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural schematic diagram of a hot air drying device; Figure 2 It is a partial structural diagram of the hot air drying device, with the box body and the side wall of the air intake hood cut away; Figure 3 It is a schematic diagram of the structure of the processing components in the hot air drying device, and the side wall of the processing box is cut away.

[0030] Figure numerals: 1, box body; 11, feeding pipe; 12, partition plate 1; 13, partition plate 2; 14, first chamber; 15, second chamber; 16, third chamber; 17, material passing space; 18, mounting plate; 2, screw conveying mechanism; 21, stirring rod; 22, spiral blade; 23, driving assembly; 24, driving gear; 3, hot air drying mechanism; 31, air outlet pipe; 4, air intake assembly; 41, air intake cover; 42, Inlet pipe; 43. Heating element; 44. Air vent; 45. Drying hole; 5. Processing assembly; 51. Processing box; 52. Processing plate; 521. Processing chamber one; 522. Processing chamber two; 523. Connecting chamber; 53. Activated carbon plate; 54. Reflux pipe; 55. Processing hole; 56. Collecting box; 57. Positioning plate; 6. Discharging mechanism; 61. Discharging box; 62. Control assembly; 63. Control door; 64. Control element. DETAILED DESCRIPTION

[0031] The present application is described in further detail below.

[0032] The embodiment of the present application discloses a hot air drying device for biomass fuel.

[0033] Reference Figure 1 and Figure 2The biomass fuel hot air drying device comprises a box body 1, a feeding pipe 11, a partition plate 12 and a partition plate 2 13, a spiral conveying mechanism 2 and a hot air drying mechanism 3. The box body 1 is a rectangular parallelepiped structure placed in a horizontal state. The feeding pipe 11 is fixedly installed on the upper surface of one end of the box body 1 and is used to add the powder to be dried into the box body 1; the partition plate 12 and the partition plate 2 13 are vertically spaced in the box body 1, and the partition plate 12 is located above the partition plate 2 13. The partition plate 12 and the partition plate 2 13 cooperate to divide the box body 1 into a first chamber 14, a second chamber 15 and a third chamber 14 which are independent of each other and arranged from top to bottom. Chamber 16, the partition plate 1 12 and the partition plate 2 13 are cooperated with the inner side wall of the box body 1 to form a material passing space 17 connecting the first chamber 14, the second chamber 15 and the third chamber 16; the spiral conveying mechanism 2 is respectively against the partition plate 12 and the inner bottom wall of the box body 1, and the spiral conveying mechanism 2 is used for stirring and conveying the powder located in the first chamber 14 and the third chamber 16, and the conveying directions of the two are opposite; the hot air drying mechanism 3 inputs hot air from the end of the first chamber 14 and the third chamber 16 away from the material passing space 17, and outputs hot air from the end of the second chamber 15 away from the material passing space 17.

[0034] The partition plate 1 12 and the partition plate 2 13 are both in a horizontal state and the partition plate 12 is in an arc-shaped structure. The length direction of the partition plate 12 and the partition plate 2 13 is parallel to the length direction of the box body 1. A mounting plate 18 with an arc-shaped upper surface is fixedly installed on the bottom wall of the box body 1, and the material passing space 17 located at the partition plate 2 13 is larger than the material passing space 17 located at the partition plate 12.

[0035] The screw conveying mechanism 2 includes two stirring rods 21, two spiral blades 22 and a driving assembly 23. The two stirring rods 21 are rotatably mounted on the box body 1 and the axis is parallel to the length direction of the box body 1; one of the stirring rods 21 is located above the partition plate 12, one of the spiral blades 22 is coaxially fixedly mounted on this stirring rod 21 and is tightly pressed against the upper surface of the partition plate 12, and the spiral blade 22 extends above the material passing space 17; the other stirring rod 21 is located below the partition plate 13 and above the mounting plate 18, and the other spiral blade 22 is coaxially fixedly mounted on the stirring rod 21 and is tightly pressed against the upper surface of the mounting plate 18 for positioning.

[0036] One end of the two stirring rods 21 away from the feeding tube 11 passes through the outside of the box body 1. The driving assembly 23 is arranged on the box body 1 and is used to drive the two stirring rods 21 to rotate in opposite directions. The driving assembly 23 includes a driving motor and two driving gears 24. The driving motor is fixedly mounted on the outer wall of the box body 1, and the output shaft of the driving motor is fixedly connected to one of the stirring rods 21. The two driving gears 24 are keyed to the two stirring rods 21 and mesh with each other. The driving motor starts to drive the two stirring rods 21 to rotate simultaneously and in opposite directions, so that the two spiral blades 22 can stir and convey the powder at the same time and in opposite directions.

[0037] Reference Figure 1 and Figure 2 The hot air drying mechanism 3 includes an air intake assembly 4, an air outlet pipe 31 and a processing assembly 5. The air intake assembly 4 is placed on the box body 1 and is used to introduce hot air into the first chamber 14 and the third chamber 16 at one end away from the material passing space 17. The air intake assembly 4 includes two air intake hoods 41, two air intake pipes 42 and a heating element 43. The two air intake hoods 41 are fixedly mounted on the side wall of the box body 1 close to the feeding pipe 11 and are respectively arranged corresponding to the two stirring rods 21. The center lines of the two air intake hoods 41 coincide with the axes of the two stirring rods 21 respectively. Ventilation holes 44 are opened on the side wall of the box body 1 and on the inner sides of the two air intake hoods 41. The vent holes 44 are used to connect the two air intake hoods 41 with the first chamber 14 and the third chamber 16 at one end away from the material passing space 17 respectively.

[0038] Two air inlet pipes 42 are fixedly mounted on the upper surfaces of the two air inlet hoods 41, and both air inlet pipes 42 are used to introduce hot air into the air inlet hoods 41; a plurality of drying holes 45 are provided on the stirring rod 21 and the spiral blade 22, and the two stirring rods 21 extend into the two air inlet hoods 41 respectively, so that the drying holes 45 are connected with the air inlet hood 41, so that the hot air in the air inlet hood 41 is output from the plurality of drying holes 45 to dry the powder; the hot air enters the first chamber 14 and the third chamber 16 through the air vents 44, and at the same time, the hot air is blown out through the drying holes 45, and the spiral blades 22 stir and transport the powder, thereby cooperating to achieve drying of the powder; the heating element 43 is fixedly mounted on the inner side walls of the two air inlet hoods 41 and is used to heat the incoming hot air again, and the heating element 43 adopts a commonly used heating wire or heating tube.

[0039] The air outlet pipe 31 is fixedly mounted on the outer wall of the box body 1 and is connected to the end of the second chamber 15 away from the material passing space 17. The air outlet pipe 31 is used to output hot air and powder and water vapor generated during drying; the processing component 5 is arranged on the air outlet pipe 31 and is used to absorb and filter and collect moisture and powder in the gas, and finally re-input the hot air into the two air inlet hoods 41 for recycling.

[0040] The box body 1 is also provided with a discharging mechanism 6 for storing dried powder and discharging it at a fixed time. The feeding pipe 11 conveys and adds powder into the box body 1, and hot air enters the first chamber 14 through the vent hole 44. The hot air blows the powder to heat and dry it. The spiral blade 22 stirs and conveys the powder to move toward the material passing space 17. The drying holes 45 on the spiral blade 22 and the stirring rod 21 of the stirring and conveying blow out hot air to dry the material, and then the powder falls downward into the third chamber 16 through the material passing space 17. The other spiral blade 22 continues to convey the powder, and the drying holes 45 on the spiral blade 22 and the stirring rod 21 of the stirring and conveying continue to blow out hot air to dry the powder.

[0041] After passing through the material passing space 17, most of the hot air in the first chamber 14 enters the second chamber 15, and a part of the hot air enters the third chamber 16. At the same time, the hot air enters the third chamber 16 away from the material passing space 17 through the vent hole 44. The hot air continues to heat the powder in the third chamber 16. The flow of the hot air also pushes the hot air entering the third chamber 16 to move back into the second chamber 15. The powder and water vapor volatilized during drying enter the processing component 5 through the second chamber 15 and the air outlet pipe 31 for absorption and filtration collection. The hot air can continue to move back to the two air inlet hoods 41 for continued recycling, and the powder in the third chamber 16 can be moved to the discharging mechanism 6 for storage. When the powder is stored to a certain amount, the discharging mechanism 6 opens to output the powder.

[0042] Reference Figure 1 and Figure 3 The treatment assembly 5 includes a treatment box 51, a treatment plate 52, an activated carbon plate 53 and a reflux pipe 54. The treatment box 51 is located on the side of the box body 1 close to the exhaust pipe 31. A treatment hole 55 is opened on the side wall of the treatment box 51. A collection box 56 is horizontally slidably installed on the treatment hole 55. A positioning plate 57 is fixedly installed on the collection box 56 and is positioned against the side wall of the treatment box 51. The positioning plate 57 blocks the treatment hole 55. The treatment plate 52 is fixedly installed on the side wall of the positioning plate 57, and the treatment plate 52 is in a horizontal state and passes through the treatment hole 55 to extend to Inside the processing box 51, the processing plate 52 separates the processing box 51 into upper and lower independent processing chamber 1 521 and processing chamber 2 522. The processing chamber 1 521 is located above the processing chamber 2 522. At the same time, one end of the processing plate 52 forms a connecting chamber 523 with the processing box 51 to connect the processing chamber 1 521 and the processing chamber 2 522. The end of the air outlet pipe 31 away from the box body 1 is fixedly connected to the side wall of the processing box 51 away from the connecting chamber 523 and is located above the collecting box 56. At the same time, the air outlet pipe 31 is connected to the end of the processing chamber 2 522 away from the connecting chamber 523.

[0043] The bottom end of the activated carbon plate 53 is plugged and installed on the upper surface of the processing plate 52 and the top end is inclined upward toward the side close to the connecting cavity 523. Multiple activated carbon plates 53 can be arranged at intervals; the return pipe 54 is fixedly installed on the upper surface of the processing box 51, and the other end of the return pipe 54 is fixedly connected to the two air intake hoods 41. At the same time, a one-way valve that only allows gas to enter the air intake hood 41 is fixedly installed on the return pipe 54. The hot air after passing through the activated carbon plate 53 is returned to the air intake hood 41 through the return pipe 54 for recycling; an air pressure detector for detecting the air pressure is fixedly installed in the box body 1. When the air pressure detector detects that the air pressure is greater than the specified value, the two air intake pipes 42 stop inputting hot air into the air intake hood 41.

[0044] The hot air, powder and water vapor output through the air outlet pipe 31 enter the processing chamber 2 522, and the temperature decreases so that part of the powder and water vapor precipitates downward into the collecting box 56 for collection, and then continues to enter the processing chamber 1 521 through the connecting chamber 523, and the powder and water precipitate downward onto the processing plate 521, and finally the powder and water are absorbed and removed by multiple activated carbon plates 53, and finally the treated hot air flows back to the air inlet hood 41 through the reflux pipe 54 for recycling. At the same time, pulling the positioning plate 57 can also take out the collecting box 56 and the processing plate 52 for cleaning and replace the activated carbon plate 53, which further improves the removal effect of powder and water.

[0045] Reference Figure 1 and Figure 2 The discharge mechanism 6 includes a discharge box 61 and a control assembly 62. The discharge box 61 is fixedly mounted on the lower surface of the box body 1. The discharge box 61 is connected to an end of the third chamber 16 away from the material passing space 17. The powder in the third chamber 16 falls downward into the discharge box 61 for storage. A discharge port for powder output is provided at the bottom of the discharge box 61.

[0046] The control component 62 is used to control the opening or closing of the discharge port. The control component 62 includes two control doors 63 and a control member 64. The two control doors 63 are installed on the discharge box 61 to slide horizontally toward each other, and the two control doors 63 approach each other to close the discharge port, or the two control doors 63 move away from each other to open the discharge port; the control member 64 is a double-headed cylinder, the control member 64 is fixedly installed on the outer wall of the discharge box 61, and the two piston rods of the control member 64 are connected to the two control doors 63, and the control member 64 starts to drive the two control doors 63 to approach or move away from each other.

[0047] The powder falls downward into the discharge box 61, and the hot air entering the discharge box 61 is driven out. At the same time, the powder entering later can also squeeze the powder in the discharge box 61, which greatly reduces the hot air entering the discharge box 61. The hot air driven out of the discharge box 61 enters the second chamber 15 through the material passing space 17 and is discharged and processed before being recycled. When the powder in the discharge box 61 is full, the control component 64 drives the two control doors 63 to open the discharge port, and the powder in the discharge box 61 is quickly discharged through the discharge port, and then the control component 64 drives the two control doors 63 to move back and close the discharge port, thereby greatly reducing the risk of hot air overflow when the powder is discharged.

[0048] The working principle of the embodiment of the present application is as follows: The feeding pipe 11 conveys and adds powder into the box body 1, and the air intake pipe 42 introduces hot air into the air intake cover 41. The hot air is heated by the heating element 43 and then enters the first chamber 14. The hot air blows the powder to heat and dry it. The spiral blades 22 stir and convey the powder to move toward the material passing space 17. The drying holes 45 blow out hot air to dry the material, and then the powder falls downward into the third chamber 16 through the material passing space 17. The other spiral blade 22 continues to convey the powder, and the drying holes 45 continue to blow out hot air to dry the powder.

[0049] After passing through the material passing space 17, most of the hot air in the first chamber 14 enters the second chamber 15, and a part of the hot air enters the third chamber 16. At the same time, the hot air enters the third chamber 16 away from the end of the material passing space 17, and the hot air continues to heat the powder in the third chamber 16. The flow of hot air also pushes the hot air entering the third chamber 16 to move back into the second chamber 15. The volatilized powder and water vapor enter the processing chamber 2 522 through the second chamber 15 and the air outlet pipe 31 during drying. Part of the powder and water vapor precipitates downward into the collecting box 56 for collection, and then continues to upward through the connecting chamber 523 into the processing chamber 1 521. The powder and water precipitate downward onto the processing plate 521. Finally, the powder and water are absorbed and removed by multiple activated carbon plates 53. Finally, the treated hot air flows back to the air intake hood 41 through the reflux pipe 54 for recycling.

[0050] The powder in the third chamber 16 falls downward into the discharge box 61, and the hot air entering the discharge box 61 is driven out. At the same time, the powder entering later can also squeeze the powder in the discharge box 61, which greatly reduces the hot air entering the discharge box 61. The hot air driven out of the discharge box 61 enters the second chamber 15 through the material passing space 17 for discharge and treatment and then recycling. When the powder in the discharge box 61 is full, the control component 64 drives the two control doors 63 to open the discharge port, and the powder in the discharge box 61 is quickly discharged through the discharge port. The control component 64 drives the two control doors 63 to move back and close the discharge port, so as to achieve drying of the powder, improve the drying efficiency and effect of the powder, and also reduce the risk of heat dissipation to the external environment, reduce energy consumption and the risk of thermal pollution to the environment.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hot air drying device for biomass fuel, characterized in that: The invention comprises a box body (1), a feeding pipe (11), a first partition plate (12), a second partition plate (13), a spiral conveying mechanism (2) and a hot air drying mechanism (3), wherein the feeding pipe (11) is arranged on the box body (1) and is used to add powder into the box body (1), the first partition plate (12) and the second partition plate (13) are arranged on the inner wall of the box body (1) with a spacing from top to bottom and cooperate with the box body (1) to form a first chamber (14), a second chamber (15) and a third chamber (16) arranged from top to bottom, and a material passage space (17) is formed between the ends of the first partition plate (12) and the second partition plate (13) away from the feeding pipe (11) and the inner wall of the box body (1) to communicate with the first chamber (14), the second chamber (15) and the third chamber (16); The spiral conveying mechanism (2) is respectively against the partition plate 1 (12) and the inner bottom wall of the box body (1) and is used to stir and convey the powder in the first chamber (14) and the third chamber (16) respectively, and the conveying directions of the two are opposite. The hot air drying mechanism (3) inputs hot air from one end of the first chamber (14) and the third chamber (16) away from the material passing space (17) and outputs hot air from one end of the second chamber (15) away from the material passing space (17).

2. A biomass fuel hot air drying device according to claim 1, characterized in that: The screw conveying mechanism (2) comprises: Two stirring rods (21) are rotatably mounted on the box body (1) and extend into the first chamber (14) and the second chamber (14) respectively; Two spiral blades (22) are respectively arranged on the two stirring rods (21) and are positioned against the upper surface of the first partition plate (12) and the bottom of the box body (1), and the spiral blades (22) are rotated to stir and transport the powder; The driving assembly (23) is arranged on the box body (1) and is used to drive the two stirring rods (21) to rotate simultaneously and in opposite directions.

3. A biomass fuel hot air drying device according to claim 2, characterized in that: The driving component (23) comprises: A driving motor, used to drive the stirring rod (21) to rotate; Two driving gears (24) are arranged on the two stirring rods (21) and mesh with each other.

4. A biomass fuel hot air drying device according to claim 2, characterized in that: The hot air drying mechanism (3) comprises: An air intake assembly (4) is arranged on the housing (1) and is used to introduce hot air into the first chamber (14) and the third chamber (16) at one end away from the material passing space (17); a plurality of drying holes (45) are evenly formed on the stirring rod (21) and the spiral blade (22) and are in communication with the air intake assembly (4); An air outlet pipe (31) is arranged on the box body (1) and is in communication with an end of the second chamber (15) away from the material passing space (17) and is used to output hot air; The processing component (5) is arranged on the air outlet pipe (31) and is used to absorb, filter and collect moisture and powder in the gas and re-input the hot air into the air intake component (4).

5. A biomass fuel hot air drying device according to claim 4, characterized in that: The air intake assembly (4) comprises: Two air inlet hoods (41) are arranged on the box body (1) and are respectively located at one end of the two stirring rods (21) away from the material passing space (17) and are connected to the drying hole (45); the box body (1) is provided with air vents (44) connecting the two air inlet hoods (41) with the first chamber (14) and the third chamber (16); Two air inlet pipes (42) are arranged on the two air inlet covers (41) and are used to input heated air; The heating element (43) is arranged in the two air inlet hoods (41) and is used to heat the gas.

6. A biomass fuel hot air drying device according to claim 4, characterized in that: The processing component (5) comprises: A processing box (51) is located on one side of the box body (1); a processing plate (52) disposed on the inner side wall of the processing box (51) and dividing the processing box (51) into a processing chamber 1 (521) and a processing chamber 2 (522) arranged in an upper and lower manner; one end of the processing plate (52) cooperates with the inner side wall of the processing box (51) to form a connecting chamber (523) connecting the processing chamber 1 (521) and the processing chamber 2 (522); and the gas outlet pipe (31) is connected to an end of the processing chamber 2 (522) away from the connecting chamber (523); An activated carbon plate (53) is detachably mounted on the processing plate (52) and is located in the first processing chamber (521) and is used to absorb dust and moisture in the gas; A return pipe (54) is provided on the processing box (51) and is in communication with one end of the processing chamber (521) away from the connecting chamber (523) and is in communication with the inside of the air inlet hood (41). A one-way valve is provided on the return pipe (54) for only allowing gas to enter the air inlet hood (41).

7. A biomass fuel hot air drying device according to claim 6, characterized in that: The processing box (51) is provided with a processing hole (55), and a collecting box (56) is slidably mounted on the processing hole (55) and extends into the second processing chamber (522) and is used to collect precipitated moisture and powder. The collecting box (56) is provided with a positioning plate (57) that abuts against the processing box (51), and the processing plate (52) is arranged on the positioning plate (57) and extends through the processing hole (55) into the processing box (51).

8. The hot air drying device for biomass fuel according to claim 1, characterized in that: The material passing space (17) located at the second partition plate (13) is larger than the material passing space (17) located at the first partition plate (12).

9. A biomass fuel hot air drying device according to claim 1, characterized in that: The box body (1) is also provided with a discharging mechanism (6), and the discharging mechanism (6) comprises: A discharge box (61) is arranged on the box body (1) and is in communication with an end of the third chamber (16) away from the material passing space (17); a discharge port for discharging powder is provided at the bottom of the discharge box (61); The control component (62) is used to control the opening or closing of the discharge port.

10. A biomass fuel hot air drying device according to claim 9, characterized in that: The control component (62) comprises: Two control doors (63) are slidably disposed on the discharge box (61) towards each other and are used to cooperate in opening or closing the discharge port; The control member (64) is used to drive the two control doors (63) to move.

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