Tobacco leaf drying device with good drying effect

Abstract

The utility model relates to a tobacco leaf drying device with a good drying effect, which belongs to the technical field of tobacco leaf drying and comprises a drying oven, a partition plate, a drying screen plate, a ventilation opening, a heat exchanger, a circulating fan, a heat pump heating device, an air conveying pipe and an air guide cone plate, air distribution holes are evenly formed in the air guide cone plate, and a plurality of moisture exhaust pipes with valves are arranged on the lower portion of a drying chamber. A conveying pipe is fixed to the bottom of the moisture discharging pipe, the other end of the conveying pipe is connected with a heat exchange device, a cold air inlet pipe and a cold air outlet pipe are arranged on the heat exchange device, the cold air outlet pipe is communicated with the drying chamber, and a moisture discharging pipe is arranged on the top of the heat exchange device. The air conveying pipe is arranged at the ventilation opening below the partition plate, air heated in a circulating mode can be guided to the air guide cone plate, then air to be subjected to heat exchange is evenly distributed at the heat exchanger through the air guide cone plate and the air distribution holes, the heat exchange effect is improved, follow-up circulating hot air can enter a drying chamber to be dried, heat energy recycling is achieved, and the energy-saving effect is achieved. And energy is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tobacco leaf drying device with good drying effect belongs to tobacco leaf drying technical field. BACKGROUND

[0002] China is the largest country in the world in terms of flue-cured tobacco planting area. Traditionally, tobacco leaf curing uses direct combustion of coal for heating. With the increasing demand for environmental protection, biomass fuel or air energy is currently used for tobacco leaf drying. The air energy heating drying device mainly sets a partition plate in the drying oven to divide the drying oven into a drying chamber and a heating chamber. The drying chamber is provided with a drying mesh plate, and the heating chamber is provided with a heat exchange device and a circulating fan. A circulating port is arranged below the partition plate, and an air return duct is arranged above the partition plate for circulating and heating hot air. However, the air entering the heating chamber through the circulating port is not evenly distributed, which is not conducive to heat exchange with the heat exchange device, affecting the subsequent tobacco leaf drying effect, and the moisture discharged from the moisture removal pipe on the drying oven is directly discharged, causing waste of heat energy. SUMMARY

[0003] The utility model provides a tobacco leaf drying device with good drying effect, which solves the problems in the above background technology.

[0004] The utility model relates to a tobacco leaf drying device with good drying effect, including drying oven, be equipped with the partition plate that divides it into drying chamber and heating chamber in drying oven, be equipped with multilayer drying mesh board in drying chamber along the vertical direction, the bottom and top of partition plate all are equipped with ventilation, be equipped with heat exchanger in heating chamber, the top of heat exchanger is equipped with circulating fan, heat exchanger is connected with heat pump heating device, the ventilation of partition plate below is fixed with the air pipe, the other end of air pipe stretches into heating chamber and is equipped with the air outlet elbow of upwards in the end, the top of air outlet elbow is equipped with the air guide cone board, the air guide cone board is evenly equipped with the air distribution hole, the lower part of drying chamber is equipped with a plurality of wet exhaust pipe with valve, the bottom of wet exhaust pipe is fixed with the delivery pipe, the other end of delivery pipe is connected with heat exchange device, be equipped with cold air inlet pipe and cold air outlet pipe on heat exchange device, cold air outlet pipe links to drying chamber, the top of heat exchange device is equipped with the moisture exhaust pipe.

[0005] As a preferred, the ventilation of partition plate top fixedly connected with the air pipe, the other end of air pipe extends to the middle of drying chamber and is equipped with the air outlet bending of downwards, the air outlet bending is fixed with the distribution cover of taper, the distribution cover is hollow structure, the bottom of distribution cover is evenly equipped with the distribution air outlet hole that links to the hollow chamber. Can the hot air of top ventilation even distribution in the upper portion of drying chamber, it is favorable to the rapid drying of tobacco leaf, increases drying effect.

[0006] As a kind of preferred, the right side inner wall of drying chamber is equipped with vertical exhaust pipe, the inner side wall of exhaust pipe is fixed with multiple inclined exhaust ports along vertical direction, exhaust pipe is connected with cold air outlet pipe, can increase air flow at the side wall of drying chamber, improve drying effect.

[0007] As a kind of preferred, heat exchange device includes heat exchange cylinder, the top and bottom of heat exchange cylinder are connected with end by flange, moisture exhaust pipe is fixed on the upper end, the right end of conveying pipe is inserted into the lower end, the inner wall of heat exchange cylinder is fixed with orifice plate, heat exchange tube is fixed in the corresponding hole of upper and lower orifice plate, cold air inlet pipe and cold air outlet pipe are between upper and lower orifice plate. Facilitate the heat exchange of hot and humid air and cold air.

[0008] As a kind of preferred, multiple guide plates are arranged between upper and lower orifice plate and guide cold air serpentine transport, increase the residence time of cold air in heat exchange cylinder, increase heat exchange effect.

[0009] As a kind of preferred, the top of conveying pipe is equipped with conical waterproof cover, waterproof cover bottom is fixed with support rod, support rod is fixed on conveying pipe, the bottom of lower end is equipped with drain pipe, valve is equipped on drain pipe. Waterproof cover can prevent water droplet in heat exchange tube from falling directly into conveying pipe, the setting of drain pipe can conveniently discharge condensed water.

[0010] As a kind of preferred, the outer side wall of heat exchange cylinder is fixed with support ring plate, the lower of each support ring plate is equipped with a pair of semicircular clamping sleeve, the connecting end of clamping sleeve is equipped with connecting flange, connecting flange is equipped with connecting bolt, the left clamping sleeve is fixed with fixed rod, fixed rod is fixed on the outer side wall of oven, can conveniently install and dismount heat exchange cylinder.

[0011] The utility model discloses the following beneficial effects:

[0012] By setting air conveying pipe at the air vent below baffle, can guide the circulating heated air to air guide cone plate, then through air guide cone plate and air distribution hole, the air to be heat exchanged is evenly distributed in heat exchanger, increase heat exchange effect, beneficial to subsequent circulating hot air entering drying chamber for drying, and the moisture discharged from moisture exhaust pipe can be introduced into heat exchange device for heat exchange, then cold air after heat exchange enters drying chamber, realize heat energy recycling, save energy. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is structure schematic diagram of the utility model;

[0014] Figure 2 It is structure schematic diagram of heat exchange device;

[0015] Figure 3 It is Figure 1 It is enlarged structure schematic diagram of A place in middle.

[0016] In the diagram: 1. Partition; 2. Ventilation duct; 3. Distribution hood; 4. Oven; 5. Distribution air outlet; 6. Cold air outlet duct; 7. Exhaust duct; 8. Moisture exhaust duct; 9. Heat exchanger cylinder; 10. Support ring plate; 11. Jacket; 12. End; 13. Cold air inlet duct; 14. Conveying pipe; 15. Dehumidification pipe; 16. Drying mesh plate; 17. Air duct; 18. Heat pump heating device; 19. Air guide cone; 20. Heat exchanger; 21. Circulating fan; 22. Heat exchange tube; 23. Baffle plate; 24. Drain pipe; 25. Waterproof cover. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments.

[0018] Example 1, such as Figures 1 to 3 As shown, this utility model is a tobacco leaf drying device with good drying effect, including a drying oven 4. The drying oven 4 is provided with a partition 1 that divides it into a drying chamber and a heating chamber. The drying chamber is provided with multiple layers of drying mesh plates 16 in the vertical direction. Ventilation openings are provided at the bottom and top of the partition 1. The heating chamber is provided with a heat exchanger 20. A circulating fan 21 is provided above the heat exchanger 20. The heat exchanger 20 is connected to a heat pump heating device 18. An air supply pipe 17 is fixed to the ventilation opening below the partition 1. The other end of 7 extends into the heating chamber and has an upward-facing air outlet bend at the end. Above the air outlet bend is a guide cone plate 19, and the guide cone plate 19 is evenly provided with air distribution holes. The lower part of the drying chamber is provided with multiple exhaust pipes 15 with valves. The bottom of the exhaust pipe 15 is fixed with a conveying pipe 14. The other end of the conveying pipe 14 is connected to a heat exchange device. The heat exchange device is provided with a cold air inlet pipe 13 and a cold air outlet pipe 6. The cold air outlet pipe 6 is connected to the drying chamber. The top of the heat exchange device is provided with a moisture discharge pipe 8.

[0019] During operation, the tobacco leaves to be dried are placed on the drying mesh plate 16, and then the heat pump heating device 18 and the circulating fan 21 are started. The heat exchanger 20 exchanges heat with the air passing through it, heating the air, which is then drawn by the circulating fan 21 and transported to the ventilation opening above the partition 1, and then enters the drying chamber to dry the tobacco leaves on the drying mesh plate 16. Some of the generated moisture will flow downward to the lower part of the drying oven 4 and be discharged from the exhaust pipe 15, and then enter the heat exchange device to exchange heat with the cold air entering through the cold air inlet pipe 13. The cold air after heat exchange then enters the drying chamber from the cold air outlet pipe 6 for reuse.

[0020] The heat exchanger 20 is a finned heat exchanger. A door is arranged on the front or rear wall of the oven 4. The hot air from the vent on the top of the partition 1 enters the hollow distribution cover 3 through the ventilation pipe 2, and then is uniformly discharged from the distribution air outlet holes 5, uniformly distributed in the upper part of the drying chamber, and then the hot air flows downward while drying the tobacco leaves.

[0021] A vertical exhaust pipe 7 is arranged on the right inner wall of the drying chamber, and a plurality of inclined exhaust ports are fixed on the inner side wall of the exhaust pipe 7 in the vertical direction. The exhaust pipe 7 is connected to the cold air outlet pipe 6.

[0022] The heat exchanger device comprises a heat exchange cylinder 9, the top and bottom of the heat exchange cylinder 9 are connected to end heads 12 through flanges, the moisture discharge pipe 8 is fixed to the upper end head 12, the right end of the conveying pipe 14 extends into the lower end head 12, and the inner wall of the heat exchange cylinder 9 is fixed with hole plates upwards and downwards. The heat exchange pipes 22 are fixed in the corresponding holes of the upper and lower hole plates.

[0023] A plurality of guide plates 23 are arranged between the upper and lower hole plates and guide the cold air to flow in a serpentine manner.

[0024] The top of the conveying pipe 14 is provided with a conical waterproof cover 25, the bottom of the waterproof cover 25 is fixed with a support rod, the support rod is fixed on the conveying pipe 14, the bottom of the lower end head 12 is provided with a drain pipe 24, and the drain pipe 24 is provided with a valve. After a period of use, the valve on the drain pipe 24 can be opened to drain the condensed water.

[0025] The outer side wall of the heat exchange cylinder 9 is fixed with support ring plates 10 upwards and downwards, each support ring plate 10 is provided with a pair of semicircular clamping sleeves 11 matched with each other below, the connecting end of the clamping sleeve 11 is provided with a connecting flange, the connecting flange is provided with a connecting bolt, the left clamping sleeve 11 is fixed with a fixed rod, and the fixed rod is fixed on the outer side wall of the oven 4. The hot and humid air entering the lower end head 12 from the conveying pipe 14 will enter the heat exchange pipes 22, and at this time, the cold air entering the heat exchange cylinder 9 from the cold air inlet pipe 13 will flow in a serpentine manner.

[0026] In addition, it should be understood that although the present specification is described in terms of embodiments, each embodiment does not contain only one independent technical solution, and the description manner of the specification is only for the sake of clarity. The skilled person should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that can be understood by the skilled person.

[0027] In the description of the utility model, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and do not require the utility model to be necessarily constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

Claims

1. A tobacco leaf drying device with good drying effect, comprising a drying oven (4), wherein the drying oven (4) is provided with a partition (1) dividing it into a drying chamber and a heating chamber, wherein multiple drying mesh plates (16) are provided vertically in the drying chamber, and ventilation openings are provided at the bottom and top of the partition (1), wherein a heat exchanger (20) is provided in the heating chamber, and a circulating fan (21) is provided above the heat exchanger (20), and a heat pump heating device (18) is connected to the heat exchanger (20), characterized in that: The air outlet on the lower part of the partition (1) is fixed with an air supply pipe (17), the other end of which extends into the heating chamber and is provided with an upward air outlet elbow, above which is provided with a wind guide cone plate (19) which is uniformly provided with air distribution holes, the lower part of the drying chamber is provided with a plurality of damp discharge pipes (15) with valves, the bottom of the damp discharge pipe (15) is fixed with a conveying pipe (14), the other end of which is connected with a heat exchange device, the heat exchange device is provided with a cold air inlet pipe (13) and a cold air outlet pipe (6), the cold air outlet pipe (6) communicates with the drying chamber, the top of the heat exchange device is provided with a damp gas discharge pipe (8).

2. The tobacco leaf drying device with good drying effect according to claim 1, characterized in that: The air outlet on the lower part of the partition (1) is fixed with an air supply pipe (17), the other end of which extends into the heating chamber and is provided with an upward air outlet elbow, above which is provided with a wind guide cone plate (19) which is uniformly provided with air distribution holes, the lower part of the drying chamber is provided with a plurality of damp discharge pipes (15) with valves, the bottom of the damp discharge pipe (15) is fixed with a conveying pipe (14), the other end of which is connected with a heat exchange device, the heat exchange device is provided with a cold air inlet pipe (13) and a cold air outlet pipe (6), the cold air outlet pipe (6) communicates with the drying chamber, the top of the heat exchange device is provided with a damp gas discharge pipe (8).

3. The tobacco leaf drying device with good drying effect according to claim 1, characterized in that: The right side inner wall of the drying chamber is provided with a vertical exhaust pipe (7), the inner side wall of which is fixed with a plurality of inclined air outlets in the vertical direction, and the cold air outlet pipe (6) is connected to the exhaust pipe (7).

4. The tobacco leaf drying device with good drying effect according to claim 1, characterized in that: The heat exchange device comprises a heat exchange cylinder (9), the top and bottom of which are connected with end heads (12) through flanges, the damp gas discharge pipe (8) is fixed on the upper end head (12), and the right end of the conveying pipe (14) extends into the lower end head (12), the inner wall of the heat exchange cylinder (9) is fixed with hole plates above and below, the heat exchange pipes (22) are fixed in the corresponding holes of the upper and lower hole plates, and the cold air inlet pipe (13) and the cold air outlet pipe (6) are between the upper and lower hole plates.

5. The tobacco leaf drying device with good drying effect according to claim 4, characterized in that: A plurality of guide plates (23) are arranged in a staggered manner between the upper and lower hole plates and guide the cold air to be transported in a serpentine manner.

6. The tobacco leaf drying device with good drying effect according to claim 5, characterized in that: The top of the conveying pipe (14) is provided with a conical waterproof cover (25), the bottom of which is fixed with a support rod, the support rod is fixed on the conveying pipe (14), the bottom of the lower end head (12) is provided with a drain pipe (24), and the drain pipe (24) is provided with a valve.

7. The tobacco leaf drying device with good drying effect according to claim 4, characterized in that: The outer side wall of the heat exchange cylinder (9) is fixed with support ring plates (10) above and below, each support ring plate (10) is provided with a pair of semicircular clamping sleeves (11) below, the connecting end of the clamping sleeve (11) is provided with a connecting flange, the connecting flange is provided with a connecting bolt, the left clamping sleeve (11) is fixed with a fixed rod, and the fixed rod is fixed on the outer side wall of the drying oven (4).

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