Curing barn capable of improving curing uniformity and curing quality of flue-cured tobacco

Abstract

The utility model discloses a curing barn capable of improving curing uniformity and curing quality of flue-cured tobacco, which is characterized in that a biomass burner is arranged in a heating chamber, a heat exchange device is arranged on the biomass burner, a smoke exhaust pipe is arranged on the heat exchange device, a hot air inlet and a return air inlet are arranged on a heat insulation wall between a tobacco loading chamber and the heating chamber, and the hot air inlet and the return air inlet are communicated with the heating chamber. An upper-layer tobacco hanging frame, a middle-layer tobacco hanging frame and a lower-layer tobacco hanging frame are arranged in the tobacco containing chamber, a coil pipe smoke inlet pipe is connected to the smoke exhaust pipe, smoke coil pipes are arranged on the upper sides of the upper-layer tobacco hanging frame, the middle-layer tobacco hanging frame and the lower-layer tobacco hanging frame and on the ground below the tobacco hanging frames, the smoke coil pipes are connected with the coil pipe smoke inlet pipe, and a coil pipe smoke exhaust pipe is arranged at the other ends of the smoke coil pipes. Air valves are arranged at the smoke inlet ends of the smoke exhaust pipe and the smoke coil pipes, the smoke coil pipes are located on the left side and the right side of the smoke hanging frame, and an inlet and outlet channel for up-and-down tobacco leaves is arranged between the smoke coil pipes on the left side and the right side; the flue-cured tobacco curing device is suitable for an airflow rising type curing barn and an airflow falling type curing barn, and flue-cured tobaccos on the upper layer, the middle layer and the lower layer can be uniformly cured.

Description

Technical Field

[0001] This utility model relates to a curing barn that can improve the uniformity and quality of tobacco curing, and belongs to the field of tobacco curing technology. Background Technology

[0002] Existing tobacco curing barns are mostly divided into three layers: upper, middle, and lower. During the tobacco curing process, they are further categorized into upward-flowing and downward-flowing types. During the curing process, the applicant discovered that temperature decreases during hot air flow. Therefore, tobacco leaves furthest from the hot air inlet experience slower curing progress and are more prone to premature brittleness during temperature transitions. For example, in a downward-flowing curing barn, the curing variation of the middle and lower layers is less pronounced than that of the upper layer, while in an upward-flowing curing barn, the curing variation of the middle and upper layers is less pronounced than that of the lower layer.

[0003] Therefore, there is a need for a curing barn that can improve the uniformity and quality of tobacco curing, and is applicable to both rising and falling airflow curing barns, enabling uniform curing of the upper, middle, and lower layers of tobacco. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a curing barn that can improve the uniformity and quality of tobacco curing, applicable to both rising and falling airflow curing barns, and capable of uniformly curing the tobacco in the upper, middle and lower layers, thus overcoming the shortcomings of the prior art.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] This utility model discloses a tobacco curing barn that can improve the uniformity and quality of tobacco curing. It includes a tobacco loading chamber and a heating chamber. A biomass burner is installed in the heating chamber, and a heat exchange device is installed on the biomass burner. An exhaust pipe is installed on the heat exchange device. A hot air inlet and a return air inlet are provided on the insulation wall between the tobacco loading chamber and the heating chamber. Three layers of tobacco racks (upper, middle, and lower) are provided in the tobacco loading chamber. A coiled inlet pipe is connected to the exhaust pipe. Flue gas coils are provided on the upper side of the three layers of tobacco racks and on the ground below the tobacco racks. The flue gas coils are connected to the coiled inlet pipes. A coiled exhaust pipe is provided at the other end of the flue gas coils. Air valves are provided at the inlet ends of the exhaust pipes and the flue gas coils. The flue gas coils are located on the left and right sides of the tobacco racks, and an inlet and outlet channel for the upper and lower tobacco leaves is provided between the left and right flue gas coils.

[0007] As mentioned above, the diameter of the flue gas coils on the upper side of the upper smoke rack and at the ground is larger than the diameter of the flue gas coils on the middle and upper sides of the smoke rack.

[0008] As mentioned above, the insulation wall between the smoke loading chamber and the heating chamber has perforations for the flue gas coil.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. This utility model utilizes the heat from the exhaust pipe of a biomass burner to heat the flue gas coils, and then uses the rising or falling airflow of the curing barn itself to circulate heat and cool the flue gas coils, thereby compensating for the losses incurred during the rising or falling airflow process. Flue gas coils are installed on the upper, middle, and lower layers of the tobacco racks and on the ground below the racks. Air valves are installed at the inlet ends of the flue gas coils, allowing for selection of the flue gas coils in different locations depending on whether the curing barn is rising or falling airflow type. For example, in a falling airflow curing barn, where the temperature is highest at the top of the tobacco loading chamber, the flue gas coils on the upper layer of the tobacco racks can be closed, while the flue gas coils on the upper and lower layers of the tobacco racks and on the ground can be opened. Thus, as the airflow descends, the flue gas coils can circulate heat and cool the middle and lower layers of the tobacco loading chamber. The lower-level tobacco racks receive additional heat, while the addition of flue gas coils on the ground also provides additional heat to the space between the ground and the lower-level tobacco racks. This helps reduce the temperature difference between the tobacco layers and improves the uniformity and quality of the tobacco curing process. For example, in an updraft curing barn, where the temperature is highest at the bottom of the loading chamber, the ground-level flue gas coils can be closed, while the upper flue gas coils on the lower, middle, and upper-level tobacco racks can be opened. As the airflow rises, the flue gas coils provide additional heat to the tobacco on the middle and upper-level tobacco racks, further reducing the temperature difference between the tobacco layers and improving the uniformity and quality of the curing process. Furthermore, access channels for the upper and lower tobacco leaves are provided between the left and right flue gas coils, facilitating the movement of workers between the upper and lower tobacco leaves.

[0011] 2. The diameter of the flue gas coils on the upper side of the upper smoke rack and at the ground is larger than that of the flue gas coils on the middle and upper sides of the smoke rack. This is because the temperature of the airflow is lowest at the end furthest from the hot air inlet, so the pipe diameter is largest at that position, which is conducive to supplementing more heat.

[0012] 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

[0013] 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:

[0014] Figure 1 This is a schematic diagram of the three-dimensional connection structure of this utility model.

[0015] Figure 2 This is a three-dimensional connection structure diagram of the present invention from another angle.

[0016] Figure 3 This is a front view of the present invention.

[0017] Figure 4 This is a schematic diagram of the three-dimensional connection structure of the flue gas coil of this utility model.

[0018] Figure 5 This is a schematic diagram of the structure of the smoke-loading side of this utility model.

[0019] Figure 6 This is a structural schematic diagram of the smoke-loading side of this utility model from another angle.

[0020] Figure 7 This is a side front view of the smoke-loading device of this utility model.

[0021] The components include: 1. Smoke chamber; 2. Heating chamber; 3. Biomass burner; 4. Heat exchanger; 5. Smoke exhaust pipe; 6. Coil inlet pipe; 7. Smoke exhaust pipe; 8. Gas valve. Detailed Implementation

[0022] 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.

[0023] like Figures 1-7As shown, this utility model discloses a tobacco curing barn that can improve the uniformity and quality of tobacco curing. It includes a tobacco loading chamber 1 and a heating chamber 2. A biomass burner 3 is installed in the heating chamber 2, and a heat exchange device 4 is installed on the biomass burner 3. An exhaust pipe 5 is installed on the heat exchange device 4. A hot air inlet and a return air inlet are provided on the insulation wall between the tobacco loading chamber 1 and the heating chamber 2. Three layers of tobacco hanging racks (upper, middle, and lower) are installed in the tobacco loading chamber 1. A coiled inlet pipe 6 is connected to the exhaust pipe 5. Flue gas coils 7 are installed on the upper side of the three layers of tobacco hanging racks and on the ground below the tobacco hanging racks. The flue gas coils 7 are connected to the coiled inlet pipes 6. 7 has a coiled exhaust pipe 8 at the other end. Gas valves 9 are provided at the smoke inlet ends of both the exhaust pipe 5 and the flue gas coil 7. The flue gas coil 7 is located on both sides of the tobacco rack, and an inlet / outlet channel for the upper and lower tobacco leaves is provided between the left and right sides of the flue gas coil 7. This structure utilizes the heat from the exhaust pipe 5 of the biomass burner 3 to heat the flue gas coil 7, and then uses the rising or falling airflow of the curing barn itself to dissipate heat from the flue gas coil 7, thereby compensating for the losses generated during the rising or falling airflow process. Flue gas coils 7 are provided on the upper, middle, and lower layers of the tobacco rack and on the ground, and are also equipped with valves 9 at the smoke inlet ends of the flue gas coil 7. The air valve 9 allows for the selection of different positions of the flue gas coil 7 depending on whether the curing barn is designed for rising or falling airflow. For example, in a curing barn with falling airflow, the temperature at the top of the tobacco loading chamber 1 is the highest, so the flue gas coil 7 on the upper side of the upper tobacco rack can be closed, while the flue gas coil 7 on the upper side of the middle and lower tobacco racks and on the ground can be opened. As the airflow descends, the flue gas coil 7 can supplement the heat to the tobacco on the middle and lower tobacco racks. Adding a flue gas coil 7 on the ground can also supplement the heat to the space between the ground and the lower tobacco rack, which helps to reduce the temperature difference between the tobacco layers and improve the uniformity and quality of tobacco curing. For example, in an airflow-type curing barn, where the temperature is highest at the bottom of the loading chamber 1, the ground-level flue gas coil 7 can be closed, while the flue gas coil 7 on the upper side of the lower, middle, and upper tobacco racks can be opened. As the airflow rises, the flue gas coil 7 can supplement the heat to the tobacco on the middle and upper tobacco racks, which helps to reduce the temperature difference between the tobacco layers and improve the uniformity and quality of the curing process. The gas valve 9 can regulate the flow rate of the flue gas discharged from the exhaust pipe 5, allowing some of the flue gas to be introduced into the flue gas coil 7. In addition, there are access channels for the upper and lower tobacco leaves between the left and right flue gas coils 7, which facilitates the entry and exit of workers for the upper and lower tobacco leaves.

[0024] Furthermore, the diameter of the flue gas coil 7 on the upper side of the smoke rack and at the ground is larger than that of the flue gas coil 7 on the middle and upper sides of the smoke rack, because the airflow temperature is lowest at the end furthest from the hot air inlet. Therefore, its position has the largest diameter, which is beneficial for supplementing more heat. Furthermore, perforations for the flue gas coil 7 are provided in the insulation wall between the smoke loading chamber 1 and the heating chamber 2, which facilitates the installation of the flue gas coil 7.

[0025] 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 that improves the uniformity and quality of tobacco curing, comprising a tobacco loading chamber (1) and a heating chamber (2), wherein a biomass burner (3) is provided in the heating chamber (2), a heat exchange device (4) is provided on the biomass burner (3), an exhaust pipe (5) is provided on the heat exchange device (4), a hot air inlet and a return air outlet are provided on the insulation wall between the tobacco loading chamber (1) and the heating chamber (2), and a three-layer tobacco hanging rack (upper, middle and lower) is provided in the tobacco loading chamber (1), characterized in that: A coiled smoke inlet pipe (6) is connected to the exhaust pipe (5). Smoke coils (7) are provided on the upper, middle and lower three layers of the smoke rack and on the ground under the smoke rack. The smoke coils (7) are connected to the coiled smoke inlet pipe (6). A coiled exhaust pipe (8) is provided at the other end of the smoke coils (7). A gas valve (9) is provided at the smoke inlet end of the exhaust pipe (5) and the smoke coils (7). The smoke coils (7) are located on the left and right sides of the smoke rack and there is an inlet and outlet channel for the upper and lower tobacco leaves between the smoke coils (7) on the left and right sides.

2. The curing barn according to claim 1, which improves the uniformity and quality of tobacco curing, is characterized in that... The diameter of the flue gas coil (7) on the upper side of the upper smoke rack and at the ground is larger than the diameter of the flue gas coil (7) on the upper side of the middle and upper smoke racks.

3. The curing barn according to any one of claims 1-2, which improves the uniformity and quality of tobacco curing, is characterized in that... A perforation for a flue gas coil (7) is provided in the insulation wall between the smoke loading chamber (1) and the heating chamber (2).

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