Reconditioning area heating and atomizing system of tobacco sheet reconditioning machine

Abstract

The re-humidification and atomization system of the re-humidification zone of the tobacco sheet re-drying machine of this utility model includes: a re-humidification zone 1, a re-humidification zone 2, a re-humidification zone 3, a main conveyor belt, a first water tank, a second water tank, a first water pump, and a second water pump. The re-humidification zones 1, 2, and 3 are placed sequentially. The main conveyor belt passes through the main housing of the re-humidification zones 1, 2, and 3 sequentially. The high-temperature condensate recovery pipe is connected to the first water tank through a first automatic switch valve. Hot water and cold water are mixed in the second water tank and then sent to the re-humidification zones 1, 2, and 3 through the main re-humidification humidification pipe and the second pump humidification branch pipe. In the second water tank, the water tank is divided into upper and lower parts by a partition. The cold water pipe enters the upper part of the partition, and a mixing water pipe is set below the partition. Cold water enters the mixing water pipe from the cold water pipe, and hot water from the first water tank extends into the mixing water pipe of the second water tank. Small water outlet holes are evenly distributed in the part of the hot water pipe in the mixing water pipe.

Description

Technical Field

[0001] This utility model relates to tobacco sheet re-drying machines and burley tobacco dryers in the tobacco industry, and in particular to a heated atomization re-humidification system for the re-humidification zone of a tobacco sheet re-drying machine. Background Technology

[0002] Currently, the tobacco sheet re-drying machines used on tobacco leaf re-drying production lines in the tobacco industry primarily employ three heating and humidification methods in the re-humidification zone: steam-water mixed atomization, high-pressure water atomization, and direct steam injection. However, steam-water mixed atomization nozzles consume a lot of steam and water, and the atomized particles are relatively large, resulting in poor absorption by the tobacco leaves and wasting steam and water. High-pressure atomized water, formed by high-pressure water output from a high-pressure pump and sprayed through nozzles, also produces relatively large atomized particles, leading to poor absorption by the tobacco leaves and low utilization rate of the humidifying water, resulting in wasting humidifying water. In the drying zone, steam forms a large amount of high-temperature condensate after heat exchange in the heater. Re-drying plants usually send the condensate back to the boiler room for heating and vaporization into steam for reuse. During the recovery and transportation of the condensate, due to its high temperature and long distance, a significant amount of heat energy is lost along the way, resulting in substantial energy waste.

[0003] Currently, the patent related to the heating and humidification treatment in the re-drying zone of a tobacco sheet re-drying machine is: Chinese patent application number CN201220544463.0, entitled "A Humidification and Re-drying Device for a Tobacco Sheet Re-drying Machine." This patent describes humidification using an air-water mixing nozzle atomization (compressed air and water), requiring a separate supply of hot water. Heating is achieved through a heat exchanger for temperature regulation and control, thus reducing steam energy consumption.

[0004] There is also a Chinese patent with application number CN201420411601.7 entitled "A rehumidification device for a tobacco sheet re-drying machine". The patent describes the use of three heating and humidification methods for rehumidification: steam and water mixed atomization, high-pressure water atomization, and direct steam injection.

[0005] There is also a Chinese patent with application number CN201820509510.5 entitled "Heating and Humidifying System for the Re-drying Zone of a Tobacco Sheet Re-drying Machine". This patent describes that multiple sets of steam and water mixing atomizers (steam and water), water nozzles and steam spray pipes are set at the bottom of the re-drying zone box to improve the uniformity of moisture temperature.

[0006] This paper proposes a heated atomizing rehumidification system for the rehumidification zone of a tobacco sheet re-drying machine. This system recovers a portion of the high-temperature condensate from the drying zone of the machine and stores it in a condensate storage tank. A water pump then pumps this high-temperature condensate from the condensate storage tank into a hot water storage tank at a set flow rate. Simultaneously, cold water is added to the hot water storage tank to create a relatively stable hot water temperature. The hot water is then pumped into the atomizing rehumidification water pipeline in the rehumidification zone of the tobacco sheet re-drying machine. Compressed air and water are ejected from the air-water atomizing nozzles in each rehumidification zone, forming ultra-fine atomized water particles. These ultra-fine atomized water particles are then sent into the rehumidification zone chamber by the fans in each rehumidification zone, where they mix with direct-injection steam to form a high-temperature, high-humidity circulating airflow that heats and humidifies the material. The advantages of this invention are as follows: First, it uses a condensate storage tank and a condensate pump to achieve a relatively stable condensate flow rate and mixing with room temperature water in the hot water storage tank; second, the hot water storage tank is equipped with a cold and hot water mixing device, which can accelerate the mixing speed of cold and hot water, avoid heat stratification, stabilize the temperature of the mixed hot water added to the rehumidification zone, and avoid temperature fluctuations in the rehumidification zone; third, the atomizing nozzles in each rehumidification zone can be fully opened, fully closed, or controlled in groups, flexibly adjusting the atomized water flow rate; fourth, the atomized water particles are extremely fine, which is conducive to absorption by tobacco leaf cells, improves the utilization rate of atomized water, and reduces the amount of atomized water sprayed; fifth, the atomization process does not require the use of steam, which can significantly reduce the energy consumption of the equipment. Summary of the Invention

[0007] The purpose of this invention is to provide a heating and atomizing rehumidification system for the rehumidification zone of a tobacco leaf re-drying machine, replacing the existing steam-water mixing atomization (steam and water) system and high-pressure water atomization system, and solving the problems of low absorption and utilization rate of humidifying water by tobacco leaves and high consumption of steam and water in the existing equipment.

[0008] To achieve the objective of this invention, the present invention adopts the following technical solution:

[0009] This utility model discloses a re-humidification system for the re-humidification zone of a tobacco sheet re-drying machine. It includes: a re-humidification zone 1, a re-humidification zone 2, a re-humidification zone 3, a main conveyor belt, a first water tank, a second water tank, a first water pump, and a second water pump. The re-humidification zones 1, 2, and 3 are arranged sequentially. The main conveyor belt travels sequentially through the main chambers of the re-humidification zones 1, 2, and 3. Each re-humidification zone consists of three or two re-humidification chambers arranged side-by-side. Each re-humidification chamber includes a re-humidification device. The system consists of a circulating fan, a single atomizing nozzle, and a double atomizing nozzle. The circulating fan is mounted on the top of the side housing. The single and double atomizing nozzles are respectively installed in the main housing or side housing below the main conveyor belt. Both nozzles are connected to the main humidification pipe of the rehumidification zone via humidification branch pipes. They are also connected to the main compressed air pipe via compressed air branch pipes. The high-temperature condensate recovery pipe is connected to the first water tank via the first automatic switch valve. The first water tank is equipped with a first level gauge at its upper and lower positions. The second water tank is connected to the first water tank via a first water pump. The second water tank is equipped with a second level gauge at its upper and lower positions. The cold water pipe is connected to the second water tank via a second automatic switch valve. After the hot and cold water are mixed in the second water tank, they are sent through the main humidification pipe and the second water pump humidification branch pipe into the first and second atomizing nozzles of the first, second, and third humidification zones, forming extremely fine atomized water particles. Specifically, in the second water tank, a separator is used... The partition divides the water tank into upper and lower parts. The cold water pipe enters the upper part of the partition, and the mixing water pipe is set below the partition. Cold water enters the mixing water pipe from the cold water pipe. Hot water from the first water tank enters the mixing water pipe of the second water tank through the hot water pipe. The hot water pipe is a blind pipe. Water outlets are evenly distributed in the hot water pipe of the mixing water pipe. The mixing water pipe is fitted around the lower end of the hot water pipe, so that the cold and hot water are fully mixed in the mixing water pipe to form warm water of a suitable temperature. The warm water flows out from the bottom of the mixing water pipe to the bottom of the second water tank.

[0010] The present invention relates to a heated atomizing rehumidification system for the rehumidification zone of a tobacco sheet re-drying machine, wherein a pressure regulating valve, a flow meter, and a first solenoid valve are sequentially installed on the humidification branch pipe.

[0011] The present invention relates to a heating and atomizing rehumidification system for the rehumidification zone of a tobacco sheet re-drying machine, wherein a pressure reducing valve and a second solenoid valve are sequentially installed on the compressed air branch pipe.

[0012] The present invention relates to a heating and atomizing rehumidification system for the rehumidification zone of a tobacco sheet re-drying machine, wherein a filter and a pressure gauge are installed on the main humidification pipe in the rehumidification zone.

[0013] The present invention relates to a heating and atomizing rehumidification system for the rehumidification zone of a tobacco sheet re-drying machine, wherein: the upper and lower parts of the second water tank and the upper and lower parts of the first water tank are connected to wastewater pipes; a third automatic switch valve is installed on the wastewater pipe at the bottom of the second water tank; a manual valve is installed on the wastewater pipe at the bottom of the first water tank; a temperature sensor is installed on the second water tank; and wastewater overflowing from the upper part and flowing from the lower part of the first and second water tanks are discharged from the heating and atomizing rehumidification system for the rehumidification zone of the tobacco sheet re-drying machine through wastewater pipes.

[0014] The present invention relates to a heating and atomizing rehumidification system for the rehumidification zone of a tobacco sheet re-drying machine, wherein: the heating and atomizing rehumidification system for the rehumidification zone of the tobacco sheet re-drying machine further includes a controller, which is connected to a pressure regulating valve, a flow meter, a first solenoid valve, a second solenoid valve, a pressure reducing valve, a first automatic switching valve, a second automatic switching valve, a third automatic switching valve, a first water pump, a second water pump, a pressure sensor, a temperature sensor, a first level gauge, and a second level gauge.

[0015] The present invention relates to a heated atomizing rehumidification system for the rehumidification zone of a tobacco sheet re-drying machine, wherein: at least four atomizing nozzles are installed on the first and second atomizing nozzles, and the atomizing nozzles are atomizing nozzles that mix compressed air and water.

[0016] The present invention relates to a heating and atomizing rehumidification system for the rehumidification zone of a tobacco re-drying machine, wherein: a one-way valve is also installed on the high-temperature condensate recovery pipe, one end of which is connected to the inlet of the first automatic switching valve, and the other end is connected to the outside of the heating and atomizing rehumidification system for the rehumidification zone of the tobacco re-drying machine, thereby discharging excess hot water transported by the high-temperature condensate recovery pipe from the heating and atomizing rehumidification system for the rehumidification zone of the tobacco re-drying machine.

[0017] The present invention relates to a heated atomizing rehumidification system for a tobacco sheet re-drying machine, wherein: in the second and third rehumidification zones, the first atomizing nozzle and the second atomizing nozzle are respectively installed in the side box below the main conveyor belt.

[0018] The present invention relates to a heated atomizing rehumidification system for a tobacco sheet re-drying machine, wherein: in the first rehumidification zone, the first atomizing nozzle and the second atomizing nozzle are respectively installed in the main housing below the main conveyor belt.

[0019] The beneficial effects of this utility model compared with the prior art are as follows: This utility model proposes a heated atomizing rehumidification system for the rehumidification zone of a tobacco leaf re-drying machine, replacing the existing steam-water mixing atomization system and high-pressure water atomization system, thus solving the problems of low absorption and utilization rate of humidifying water by tobacco leaves and high steam and water consumption of the equipment. It has the following advantages:

[0020] (i) A condensate storage tank and a condensate pump are used to achieve a relatively stable condensate flow rate and mixing of room temperature water with hot water in the hot water storage tank;

[0021] (ii) The hot water storage tank is equipped with a cold and hot water mixing device, which can accelerate the mixing speed of cold and hot water, avoid heat stratification, stabilize the temperature of the mixed hot water added to the humidification zone tank, and avoid temperature fluctuations in the humidification zone.

[0022] (iii) The atomizing nozzles in each rehumidification zone can be fully opened, fully closed, or controlled in groups to flexibly adjust the atomized water flow rate; (iv) The atomized water particles are extremely fine, which is conducive to the absorption of tobacco leaf cells, improves the utilization rate of atomized water, and reduces the amount of atomized water sprayed; (v) The atomization process does not require the use of steam, which can significantly reduce the energy consumption of the equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the heating and atomization rehumidification system in the rehumidification zone of the tobacco sheet re-drying machine of this utility model;

[0024] Figure 2 This is a three-dimensional schematic diagram of the heating and atomizing rehumidification system in the rehumidification zone of the tobacco sheet re-drying machine of this utility model.

[0025] Figure 3 for Figure 2 A top-down diagram;

[0026] Figure 4 A three-dimensional schematic diagram of the pipelines connected to Restoration Zone 1, Restoration Zone 2, and Restoration Zone 3;

[0027] Figure 5 A three-dimensional schematic diagram of the pipeline connecting the first and second water tanks;

[0028] Figure 6 A three-dimensional schematic diagram of the rehumidification box.

[0029] Figure 7 From Figure 3 A schematic diagram of the cross-section of the re-moistening zone 1 cut at point AA;

[0030] Figure 8 From Figure 3 A schematic diagram of the cross-sections of the second and third moisture reversion zones cut open at point BB;

[0031] Figure 9 This is a cross-sectional schematic diagram of the hot water mixed in the second water tank.

[0032] exist Figures 1 to 8In the middle; No. 1 is the rehumidification zone 1; No. 2 is the rehumidification zone 2; No. 3 is the rehumidification zone 3; No. 4 is the controller; No. 5 is the circulating fan; No. 6 is the main conveyor belt; No. 7 is the first atomizing nozzle; No. 8 is the second atomizing nozzle; No. 9 is the rehumidification chamber; No. 10 is the side chamber; No. 11 is the high-temperature condensate recovery pipe; No. 12 is the cold water pipe; No. 13 is the main rehumidification humidification pipe; No. 14 is the wastewater pipe; No. 15 is the one-way valve; No. 16 is the first automatic switching valve; No. 17 is the first water tank; No. 18 is the first level gauge; No. 19 is the manual valve; No. 20 is the first water pump; No. 21 is the... Two water tanks; No. 22 is the second automatic switch valve; No. 23 is the second level gauge; No. 24 is the temperature sensor; No. 25 is the third automatic switch valve; No. 26 is the filter; No. 27 is the second water pump; No. 28 is the pressure sensor; No. 29 is the pressure regulating valve; No. 30 is the humidification branch pipe; No. 31 is the flow meter; No. 32 is the first ball valve; No. 33 is the compressed air branch pipe; No. 34 is the pressure reducing valve; No. 35 is the second solenoid valve; No. 36 is the compressed air main pipe; No. 37 is the main tank; No. 51 is the hot water pipe; No. 52 is the partition; No. 53 is the mixing water pipe; No. 54 is the water outlet. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings, taking a tobacco sheet re-drying machine as an example.

[0034] like Figures 1 to 8 As shown, the re-humidification and atomization system of the tobacco sheet re-drying machine of this utility model includes: re-humidification zone 1, re-humidification zone 2, re-humidification zone 3, main conveyor belt 6, first water tank 17, second water tank 21, first water pump 20, and second water pump 27. Re-humidification zone 1, re-humidification zone 2, and re-humidification zone 3 are placed sequentially. The main conveyor belt 6 passes sequentially through the main housing 37 of re-humidification zone 1, re-humidification zone 2, and re-humidification zone 3. Re-humidification zone 1, re-humidification zone 2, and re-humidification zone 3 are composed of three or two re-humidification housings 9 placed side by side. Each rehumidification chamber 9 includes a rehumidification device comprising: a circulating fan 5, a primary atomizing nozzle 7, and a secondary atomizing nozzle 8. The circulating fan 5 is mounted on the top of the side chamber 10. The primary atomizing nozzle 7 and the secondary atomizing nozzle 8 are respectively mounted in the main chamber 37 or the side chamber 10 below the main conveyor belt 6. The primary atomizing nozzle 7 and the secondary atomizing nozzle 8 are respectively connected to the main humidification pipe 13 of the rehumidification zone via the humidification branch pipe 30. At the same time, the primary atomizing nozzle 7 and the secondary atomizing nozzle 8 are respectively connected to the main compressed air pipe 36 via the compressed air branch pipe 33.

[0035] The high-temperature condensate recovery pipe 11 is connected to the first water tank 17 via the first automatic switch valve 16. The first level gauge 18 is installed at the upper and lower positions of the first water tank 17. The second water tank 21 is connected to the first water tank 17 via the first water pump 20. The second level gauge 23 is installed at the upper and lower positions of the second water tank 21. The cold water pipe 12 is connected to the second water tank 21 via the second automatic switch valve 22. After the hot water and cold water are mixed in the second water tank 21, they are sent to the first atomizing nozzle 7 and the second atomizing nozzle 8 of the first humidification zone 1, the second humidification zone 2, and the third humidification zone 3 through the main humidification pipe 13, the second water pump 27, and the humidification branch pipe 30 to form extremely fine atomized water particles.

[0036] A pressure regulating valve 29, a flow meter 31, and a first solenoid valve 32 are sequentially installed on the humidification branch pipe 30; a pressure reducing valve 34 and a second solenoid valve 35 are sequentially installed on the compressed air branch pipe 33; a filter 26 and a pressure gauge 28 are installed on the main humidification pipe 13 in the humidification zone; the upper and lower parts of the second water tank 21 and the upper and lower parts of the first water tank 17 are connected to the wastewater pipe 14; a third automatic switching valve 25 is installed on the wastewater pipe 14 at the bottom of the second water tank 21; and a manual valve 19 is installed on the wastewater pipe 14 at the bottom of the first water tank 17. Temperature... The detector 24 is installed on the second water tank 21. Wastewater overflowing from the upper part of the first water tank 17 and wastewater flowing from the lower part of the second water tank 21 are discharged from the heating and atomizing rehumidification system of the tobacco re-drying machine through the wastewater pipe 14. A one-way valve 15 is also installed on the high-temperature condensate recovery pipe 11. One end of the one-way valve 15 is connected to the inlet of the first automatic switch valve 16, and the other end is connected to the outside of the heating and atomizing rehumidification system of the tobacco re-drying machine. It discharges the excess hot water transported by the high-temperature condensate recovery pipe 11 from the heating and atomizing rehumidification system of the tobacco re-drying machine.

[0037] The re-humidification heating and atomization system in the re-humidification zone of the tobacco sheet re-drying machine also includes a controller 4. The controller 4 is connected to a pressure regulating valve 29, a flow meter 31, a first solenoid valve 32, a second solenoid valve 35, a pressure reducing valve 34, a first automatic switching valve 16, a second automatic switching valve 22, a third automatic switching valve 25, a first water pump 20, a second water pump 27, a pressure sensor 28, a temperature sensor 24, a first level gauge 18, and a second level gauge 23. Figure 1 For clarity, the connection lines between controller 4 and the aforementioned components are not shown.

[0038] At least four atomizing nozzles are installed on the first atomizing nozzle 7 and the second atomizing nozzle 8. These atomizing nozzles are for mixing compressed air and water. In the second and third rehumidification zones 2 and 3, the first atomizing nozzle 7 and the second atomizing nozzle 8 are respectively installed in the side housing 10 below the main conveyor belt 6. In the first rehumidification zone 1, the first atomizing nozzle 7 and the second atomizing nozzle 8 are respectively installed in the main housing 37 below the main conveyor belt 6.

[0039] In the second water tank 21, a partition 52 divides the tank into upper and lower parts. A cold water pipe 12 enters above the partition 52, and a mixing pipe 53 is installed within the partition 52, through which cold water enters. Hot water from the first water tank 17 enters the mixing pipe 53 of the second water tank 21 via a hot water pipe 51. The hot water pipe 51 is a blind pipe, and evenly distributed water outlets 54 are located within it. The mixing pipe 53 covers the lower end of the hot water pipe 51, ensuring thorough mixing of the cold and hot water to a suitable temperature. The warm water flows out from below the mixing pipe 53 and exits below the second water tank 21. Water exceeding the water level in the second water tank is discharged through an overflow outlet. Wastewater from the second water tank is discharged through a wastewater pipe 14.

[0040] The heating and atomizing rehumidification system in the rehumidification zone of the tobacco sheet re-drying machine also includes a direct injection steam pipe, which is existing technology and will not be described further in this utility model.

[0041] This embodiment has three rehumidification zones, but the actual number of rehumidification zones can be expanded or reduced according to the equipment's production capacity requirements.

[0042] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. A conditioning system for a conditioning zone of a tobacco redrying machine, comprising: The rehumidification zones are: Rehumidification Zone 1 (1), Rehumidification Zone 2 (2), Rehumidification Zone 3 (3), Main Conveying Belt (6), First Water Tank (17), Second Water Tank (21), First Water Pump (20), and Second Water Pump (27). Rehumidification Zone 1 (1), Rehumidification Zone 2 (2), and Rehumidification Zone 3 (3) are placed in sequence. The main conveying belt (6) passes through the main housing (37) of Rehumidification Zone 1 (1), Rehumidification Zone 2 (2), and Rehumidification Zone 3 (3) in sequence. Rehumidification Zone 1 (1), Rehumidification Zone 2 (2), and Rehumidification Zone 3 (3) are composed of three or two rehumidification housings (9) placed side by side. The rehumidification device of each rehumidification housing (9) includes: a circulating fan (5), one atomizing nozzle (7), and two misting nozzles. Atomizing nozzle (8) and a circulating fan (5) are installed on the top of the side box (10). One atomizing nozzle (7) and two atomizing nozzles (8) are respectively installed in the main box (37) or the side box (10) below the main conveyor belt (6). One atomizing nozzle (7) and two atomizing nozzles (8) are respectively connected to the humidifying main pipe (13) of the humidification zone through the humidification branch pipe (30). At the same time, one atomizing nozzle (7) and two atomizing nozzles (8) are respectively connected to the compressed air main pipe (36) through the compressed air branch pipe (33). The feature is that the high temperature condensate recovery pipe (11) is connected to the first water tank (17) through the first automatic switch valve (16). In the first water tank (17) The first level gauge (18) is installed at the upper and lower positions of the first water tank (21), and the second level gauge (23) is installed at the upper and lower positions of the second water tank (21). The cold water pipe (12) is connected to the second water tank (21) through the second automatic switch valve (22). After the hot water and cold water are mixed in the second water tank (21), they are sent to the first atomizing nozzle (7) and the second atomizing nozzle (8) of the first humidification zone (1), the second humidification zone (2), and the third humidification zone (3) through the main humidification pipe (13), the second water pump (27), and the humidification branch pipe (30) to form extremely fine atomized water particles. The feature is that: in the second water tank (21), the water tank is divided into upper and lower parts by a partition (52), and the cold water is... Pipe (12) enters above partition (52). A mixing water pipe (53) is installed below partition (52). Cold water enters the mixing water pipe (53) from cold water pipe (12). Hot water from the first water tank (17) enters the mixing water pipe (53) of the second water tank (21) through hot water pipe (51). Hot water pipe (51) is a blind pipe. Water outlet holes (54) are evenly distributed in the hot water pipe (51) in the mixing water pipe (53). The mixing water pipe (53) is fitted around the lower end of the hot water pipe (51), so that cold and hot water are fully mixed in the mixing water pipe (53) to form warm water at a suitable temperature. The warm water flows out from below the mixing water pipe (53) below the second water tank (21).

2. The conditioning system for a tobacco redrying machine as set forth in claim 1, wherein: A pressure regulating valve (29), a flow meter (31), and a first solenoid valve (32) are sequentially installed on the humidification branch pipe (30).

3. The conditioning system for a tobacco redrying area of a tobacco redrying machine of claim 2 wherein: A pressure reducing valve (34) and a second solenoid valve (35) are sequentially installed on the compressed air branch pipe (33).

4. The conditioning system for a tobacco redrying machine as set forth in claim 3, wherein: A filter (26) and a pressure gauge (28) are installed on the humidification main pipe (13) in the humidification zone.

5. The conditioning system for a tobacco redrying area of a tobacco redrying machine of claim 4 wherein: The upper and lower parts of the second water tank (21) and the upper and lower parts of the first water tank (17) are connected to the wastewater pipe (14). A third automatic switch valve (25) is installed on the wastewater pipe (14) at the bottom of the second water tank (21), and a manual valve (19) is installed on the wastewater pipe (14) at the bottom of the first water tank (17). A temperature sensor (24) is installed on the second water tank (21). Wastewater overflowing from the upper part of the first water tank (17) and wastewater flowing out from the lower part of the second water tank (21) are discharged from the heating and atomizing rehumidification system of the tobacco sheet re-drying machine through the wastewater pipe (14).

6. The conditioning system for a tobacco redrying area of a tobacco redrying machine of claim 5 wherein: The re-drying machine for tobacco sheets, including the heating and atomizing re-humidification system in the re-humidification zone, also includes a controller (4). The controller (4) is connected to a pressure regulating valve (29), a flow meter (31), a first solenoid valve (32), a second solenoid valve (35), a pressure reducing valve (34), a first automatic switching valve (16), a second automatic switching valve (22), a third automatic switching valve (25), a first water pump (20), a second water pump (27), a pressure sensor (28), a temperature sensor (24), a first level gauge (18), and a second level gauge (23).

7. The conditioning system for a tobacco redrying area of a tobacco redrying machine of claim 6 wherein: At least four atomizing nozzles are installed on the first atomizing nozzle (7) and the second atomizing nozzle (8), which are atomizing nozzles that mix compressed air and water.

8. The conditioning system for a tobacco redrying area of a tobacco redrying machine of claim 7 wherein: A one-way valve (15) is also installed on the high-temperature condensate recovery pipe (11). One end of the one-way valve (15) is connected to the inlet of the first automatic switch valve (16), and the other end is connected to the outside of the heating and atomizing rehumidification system of the rehumidification zone of the tobacco re-drying machine. It discharges the excess hot water transported by the high-temperature condensate recovery pipe (11) into the heating and atomizing rehumidification system of the rehumidification zone of the tobacco re-drying machine.

9. The conditioning system for a tobacco redrying area of a tobacco redrying machine of claim 8 wherein: In the second and third rehumidification zones (2) and (3), the first atomizing nozzle (7) and the second atomizing nozzle (8) are respectively installed in the side box (10) below the main conveyor belt (6).

10. The conditioning system for a tobacco redrying area of a tobacco redrying machine of claim 9 wherein: In the first humidification zone (1), the first atomizing nozzle (7) and the second atomizing nozzle (8) are respectively installed in the main box (37) below the main conveyor belt (6).

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