A tobacco curing barn with good air distribution effect

Abstract

This utility model discloses a tobacco curing barn with good air distribution effect. It includes a curing barn body, a tobacco loading chamber and a heating chamber within the curing barn body. A biomass burner is installed in the heating chamber, and a heat exchange device is installed on the biomass burner. A tobacco rack is installed in the tobacco loading chamber. A hot air inlet and a return air outlet are provided on the heat insulation wall between the heating chamber and the tobacco loading chamber. A Venturi tube is connected to the air inlet. A swirl distributor for evenly distributing hot air is distributed in the throat of the Venturi tube. Multiple air supply branches are provided on the swirl distributor. The air supply branches are connected to a three-dimensional air distribution device distributed in the tobacco loading chamber. This utility model can evenly distribute air, thereby fundamentally improving the overall quality and energy efficiency of tobacco curing.

Description

Technical Field

[0001] This utility model relates to a tobacco curing barn with good air distribution effect, belonging to the field of curing barn air distribution technology. Background Technology

[0002] Currently, tobacco curing barns commonly use cotton, linen, or perforated metal air distribution plates to achieve uniform airflow distribution during the curing process. This method is a passive, blockage-based air distribution system with a simplistic principle and inherent drawbacks: porous materials and tiny pores are easily clogged by dust, leading to increased air resistance, a sharp decline in air distribution effectiveness over time, and difficulties in cleaning and maintenance. Furthermore, this static air distribution structure cannot be flexibly adjusted according to the curing process requirements, resulting in wind speed and temperature differences in different areas of the barn, severely impacting the curing quality and consistency of the tobacco leaves.

[0003] Therefore, there is a need for an air distribution device for tobacco curing barns with good air distribution effect, which can distribute air evenly to fundamentally improve the overall quality and energy efficiency of tobacco curing. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a tobacco curing barn with good air distribution effect, which can distribute air evenly to fundamentally improve the overall quality and energy efficiency of tobacco curing; and can overcome the shortcomings of the prior art.

[0005] The objective of this utility model is achieved through the following technical solution: This utility model discloses a tobacco curing barn with good air distribution effect. It includes a curing barn body, a tobacco loading chamber and a heating chamber within the curing barn body. A biomass burner is installed in the heating chamber, and a heat exchange device is installed on the biomass burner. A tobacco rack is installed in the tobacco loading chamber. A hot air inlet and a return air outlet are provided on the heat insulation wall between the heating chamber and the tobacco loading chamber. A Venturi tube is connected to the air inlet. A swirl distributor for evenly distributing hot air is distributed in the throat of the Venturi tube. Multiple air supply branches are provided on the swirl distributor. The air supply branches are connected to a three-dimensional air distribution device distributed in the tobacco loading chamber.

[0006] As mentioned above, a tailpipe with a larger diameter is provided on the rear side of the throat of the venturi tube, and the hot gas in the tailpipe is released directly into the smoke chamber or returned to the heating chamber through the circulation pipe.

[0007] The aforementioned cyclone distributor includes a cylindrical tube, one end of which is closed. An air inlet pipe is provided at the closed end of the cylindrical tube, which enters in a tangential direction. A tapered tube with a larger opening is connected to the other end of the cylindrical tube. A sealing plate is provided at the air outlet end of the tapered tube, and multiple air outlet pipes are provided on the sealing plate. The air outlet pipes are connected to the air supply branch pipe.

[0008] The aforementioned three-dimensional air distribution device includes an air distribution frame distributed on the upper side of the smoke chamber, a fixed plate on the upper side of the air distribution frame, the other end of the air supply branch pipe being installed on the fixed plate and communicating with the inner side of the air distribution frame, and air distribution grilles distributed at the outlet of the air distribution frame.

[0009] As mentioned above, a support plate for the air distribution frame is provided on the upper side of the smoke loading chamber.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses a Venturi tube as the primary air distribution unit, which achieves pressure equalization through diameter variation. It guides the uniform airflow from the throat of the Venturi tube into a cyclone distributor, which then serves as the secondary air distribution unit to achieve uniform flow distribution. The hot air, now with uniform flow distribution, is then delivered to the three-dimensional air distribution device through branch pipes, achieving balanced airflow across the curing barn and fundamentally improving the overall quality and energy efficiency of the flue-cured tobacco.

[0011] 2. The Venturi tube has a tailpipe with a larger diameter at the back of the throat. The hot air from the tailpipe is released directly into the smoke chamber or returned to the heating chamber through the circulation pipe. With this structure, after the air is distributed by the swirl distributor at the throat, the remaining air force is very small and can be released in the curing chamber or circulated back into the heating chamber. The circulation pipe can be perforated in the insulation wall so that the remaining hot air can return to the heating chamber.

[0012] 3. The vortex distributor includes a cylindrical tube, one end of which is closed. An air inlet pipe is provided at the closed end of the cylindrical tube, which enters tangentially. A tapered tube with a larger opening is connected to the other end of the cylindrical tube. A sealing plate is provided at the outlet end of the tapered tube, and multiple air outlet pipes are provided on the sealing plate. The air outlet pipes are connected to the air supply branch pipes. In this way, after the hot air enters the cylindrical tube through the tangential air inlet pipe, it can rotate along the inner wall of the cylindrical tube and finally enter the tapered tube with a larger opening, achieving uniform static pressure. Then, through the air supply branch pipes, an equal amount of air can be delivered to the three-dimensional air distribution device for air distribution.

[0013] 4. The three-dimensional air distribution device includes air distribution frames distributed on the upper side of the smoke loading chamber. A fixed plate is provided on the upper side of the air distribution frames. The other end of the air supply branch pipe is installed on the fixed plate and connected to the inner side of the air distribution frames. Air distribution grilles are distributed at the outlets of the air distribution frames. A support plate for the air distribution frames is provided on the upper side of the smoke loading chamber. This arrangement of multiple air distribution frames on the upper side of the smoke loading chamber facilitates connection with the air supply branch pipes and ensures uniform airflow. This achieves a relatively uniform airflow regardless of the distance from the air inlet.

[0014] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings, wherein: Figure 1 This is a perspective structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the connection structure between the Venturi tube and the three-dimensional air distribution device of this utility model.

[0017] Figure 3 This is a schematic diagram of the connection structure of the venturi tube of this utility model.

[0018] Figure 4 This is a schematic diagram of the connection structure of the three-dimensional air distribution device of this utility model.

[0019] Figure 5 This is a schematic diagram of the three-dimensional connection structure of the three-dimensional air distribution device of this utility model from another angle.

[0020] The components include: 1. Curing barn body; 2. Smoke loading chamber; 3. Heating chamber; 4. Biomass burner; 5. Heat exchange device; 6. Insulation wall; 7. Air inlet; 8. Air return outlet; 9. Throat; 10. Swirl distributor; 11. Air supply branch pipe; 12. Three-dimensional air distribution device; 13. Tail pipe; 14. Cylindrical pipe; 15. Air inlet pipe; 16. Conical pipe; 17. Air outlet pipe; 18. Air distribution frame; 19. Air distribution grille; and 20. Support plate. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0022] like Figures 1-5As shown, this utility model discloses a tobacco curing barn with good air distribution effect. It includes a curing barn body 1, a tobacco loading chamber 2 and a heating chamber 3 inside the curing barn body 1. A biomass burner 4 is installed in the heating chamber 3, and a heat exchange device 5 is installed on the biomass burner 4. A tobacco rack is installed in the tobacco loading chamber 2. A hot air inlet 7 and a return air inlet 8 are provided on the heat insulation wall 6 between the heating chamber 3 and the tobacco loading chamber 2. A Venturi tube is connected to the air inlet 7. A swirl distributor 10 is distributed at the throat 9 of the Venturi tube to evenly distribute the hot air. Multiple air supply branches 11 are provided on the swirl distributor 10. The air supply branches 11 are connected to a three-dimensional air distribution device 12 distributed in the tobacco loading chamber 2. In this structure, the Venturi tube, as the primary air distribution unit, plays a role in changing the diameter and equalizing the pressure, and can guide the uniform air force at the throat 9 of the Venturi tube into the swirl distributor 10. The swirl distributor 10, as the secondary air distribution unit, achieves even distribution of airflow. Then, the hot air that achieves even airflow distribution is sent into the three-dimensional air distribution device 12 through the air supply branch pipe 11 to achieve wind balance at the near and far positions of the curing barn, and to evenly distribute the air, so as to fundamentally improve the overall quality and energy efficiency of the tobacco curing.

[0023] Furthermore, a tailpipe 13 with a larger diameter is provided on the rear side of the throat 9 of the Venturi tube. The hot air from the tailpipe 13 is directly released into the smoke chamber 2 or returned to the heating chamber 3 through the circulation pipe. With this structure, after the air is divided by the swirl distributor 10 of the throat 9, the remaining air force is very small and can be released in the drying room or circulated back into the heating chamber 3. The circulation pipe can be perforated in the heat insulation wall 6 so that the remaining hot air can return to the heating chamber 3.

[0024] Furthermore, the vortex distributor 10 includes a cylindrical tube 14, one end of which is closed. An air inlet pipe 15 is provided at the closed end of the cylindrical tube 14, which enters in a tangential direction. A tapered pipe 16 with a larger opening is connected to the other end of the cylindrical tube 14. A sealing plate is provided at the air outlet end of the tapered pipe 16, and multiple air outlet pipes 17 are provided on the sealing plate. The air outlet pipes 17 are connected to the air supply branch pipe 11. In this way, after the hot air enters the cylindrical tube 14 through the tangential air inlet pipe 15, it can rotate along the inner wall of the cylindrical tube 14 and finally enter the tapered pipe 16 with a larger opening, achieving uniform static pressure. Then, the same amount of air force can be delivered to the three-dimensional air distribution device 12 for air distribution through the air supply branch pipe 11.

[0025] Furthermore, the three-dimensional air distribution device 12 includes air distribution frames 18 distributed on the upper side of the smoke loading chamber 2. A fixing plate is provided on the upper side of the air distribution frame 18, and the other end of the air supply branch pipe 11 is installed on the fixing plate and communicates with the inner side of the air distribution frame 18. Air distribution grilles 19 are distributed at the outlet of the air distribution frame 18, and a support plate 20 for the air distribution frame 18 is provided on the upper side of the smoke loading chamber 2. In this way, the multiple air distribution frames arranged on the upper side of the smoke loading chamber 2 are conducive to connecting the air supply branch pipe 11 and uniform air distribution. That is, it can achieve a relatively uniform air force regardless of the distance from the air inlet 7.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to restrict the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments without departing from the technical solution of the present utility model and based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A tobacco curing barn with good air distribution effect, comprising a curing barn body (1), a tobacco loading chamber (2) and a heating chamber (3) provided in the curing barn body (1), a biomass burner (4) provided in the heating chamber (3), a heat exchange device (5) provided on the biomass burner (4), a tobacco hanging rack provided in the tobacco loading chamber (2), and a hot air inlet (7) and a return air outlet (8) provided on the heat insulation wall (6) between the heating chamber (3) and the tobacco loading chamber (2), characterized in that: A venturi tube is connected to the air inlet (7), and a vortex distributor (10) is distributed at the throat (9) of the venturi tube to evenly distribute the hot air. Multiple air supply branches (11) are provided on the vortex distributor (10), and the air supply branches (11) are connected to a three-dimensional air distribution device (12) distributed in the smoke chamber (2).

2. The tobacco curing barn with good air distribution effect according to claim 1, characterized in that, The venturi tube has a tail pipe (13) with a larger diameter on the rear side of the throat (9). The hot gas from the tail pipe (13) is released directly into the smoke chamber (2) or returned to the heating chamber (3) through the circulation pipe.

3. The tobacco curing barn with good air distribution effect according to claim 1, characterized in that, The vortex distributor (10) includes a cylindrical tube (14), one end of which is closed. An air inlet pipe (15) is provided at the closed end of the cylindrical tube (14) and enters in the tangential direction. A tapered pipe (16) with a larger opening is connected to the other end of the cylindrical tube (14). A sealing plate is provided at the outlet end of the tapered pipe (16), and multiple air outlet pipes (17) are provided on the sealing plate. The air outlet pipes (17) are connected to the air supply branch pipe (11).

4. The tobacco curing barn with good air distribution effect according to claim 1, characterized in that, The three-dimensional air distribution device (12) includes an air distribution frame (18) distributed on the upper side of the smoke chamber (2), a fixed plate is provided on the upper side of the air distribution frame (18), the other end of the air supply branch pipe (11) is installed on the fixed plate and communicates with the inner side of the air distribution frame (18), and an air distribution grille (19) is distributed at the outlet of the air distribution frame (18).

5. The tobacco curing barn with good air distribution effect according to claim 1, characterized in that, A support plate (20) for the air distribution frame (18) is provided on the upper side of the smoke loading chamber (2).

Images