Low-intensity tobacco leaf heating, humidifying and moisture regaining system and process method

Abstract

The invention discloses a low-strength tobacco leaf heating, humidifying and moisture regaining system and a process method, the system comprises a heating and humidifying device and a moisture regaining room device, and an air cabinet of the heating and humidifying device is provided with an air inlet and an air outlet; a first heating assembly, a wet film humidifier and a second heating assembly of the heating and humidifying device are sequentially installed in the air cabinet in the direction from the air inlet to the air outlet. The moisture regaining room device comprises a moisture regaining room body, an air supply pipe and two air return pipes, the air supply pipe is connected with the air outlet, the air return pipes are connected with the air inlet, the two air return pipes are arranged on the two circumferential sides of the air supply pipe respectively and located on the tops of the two opposite side walls of the moisture regaining room body, and the air return pipes are connected with a plurality of air return branch pipes extending downwards. The moisture content of tobacco leaves is effectively increased through hot wind and hot wind generated by the tobacco leaf heating and humidifying device, tobacco leaves are prevented from being broken in the transportation and production process, and meanwhile the phenomenon that important chemical components such as total sugar and reducing sugar are irreversibly reduced due to instant loss of the chemical components in the tobacco leaves is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco leaf production, and particularly relates to a low-intensity tobacco leaf heating, humidifying and conditioning system and a process method. Background Art

[0002] Since the cycle from raw tobacco storage to finished product out of the warehouse is relatively long. During this process, the moisture of the temporarily stored tobacco leaves is severely lost before and after sorting, so that the breakage rate of the tobacco leaves is relatively large during the sorting and leaf laying processes. In order to reduce the breakage rate of the tobacco leaves and improve the out-turn rate of the finished tobacco flakes, the tobacco leaves need to be conditioned and humidified before sorting or threshing and redrying. At present, the heating and humidification are carried out by manually spraying steam. By manually spraying steam for heating and humidification, in actual operation, the heating and humidification of the tobacco leaves are uneven, the chemical components of the tobacco leaves will be irreversibly reduced, and the efficiency is low, which is difficult to meet the storage requirements of a large number of tobacco leaves. Moreover, the gas discharged after heating and humidifying the tobacco leaves pollutes the air environment.

[0003] In addition, the temperature difference between the tobacco leaf and the hot air is the potential difference for sensible heat transfer, while the difference between the partial pressure of the water mist in the hot air and the partial pressure of the water vapor on the surface of the tobacco leaf is the potential difference for the transfer of the water mist from the flue gas to the solution. During the process of the tobacco leaf absorbing the water mist, on the one hand, the water vapor in the water mist mass-transfer to the tobacco leaf, and on the other hand, the sensible heat in the hot air transfers heat to the tobacco leaf. The increase in the temperature of the tobacco leaf will change the partial pressure of the water vapor on the surface of the tobacco leaf, thereby affecting the speed of absorbing the water mist. Therefore, the heat transfer potential difference and the mass transfer potential difference in the process of the tobacco leaf absorbing the water mist have an interactive and coupled effect on the heat and mass transfer process. The current conventional heating and humidifying equipment is difficult to accurately control the temperature and humidity of the hot air, and the efficiency of heating and humidifying the hot air is low. Summary of the Invention

[0004] The purpose of the present invention is to provide a low-intensity tobacco leaf heating, humidifying and conditioning system and a process method to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or create conditions.

[0005] The technical solutions adopted to solve the above technical problems are as follows:

[0006] First, the present invention provides a low-intensity tobacco leaf heating, humidifying and conditioning system, including:

[0007] A heating and humidifying device, including an air cabinet, a wet film humidifier, a first heating component, a second heating component and a fan component. The air cabinet is provided with an air inlet and an air outlet. The first heating component, the wet film humidifier and the second heating component are sequentially installed in the air cabinet along the direction from the air inlet to the air outlet. The fan component is installed in the air cabinet;

[0008] The rehumidification chamber device includes a rehumidification chamber body, an air supply duct, and a return air duct. The air supply duct is connected to the air outlet, and the air supply duct is fixedly arranged along the center line of the top of the rehumidification chamber body. A plurality of air supply outlets are evenly distributed on the outer periphery of the air supply duct. The return air duct is connected to the air inlet, and there are two return air ducts. The two return air ducts are respectively arranged on both circumferential sides of the air supply duct and are located at the tops of the opposite side walls of the rehumidification chamber body. The return air duct is connected to a plurality of downwardly extending return air branches, and return air outlets are provided at the lower parts of the return air branches.

[0009] The beneficial effects of the present invention are as follows:

[0010] Under the suction of the return air of multiple return air branches in the present invention, air in the rehumidification chamber body flows downward obliquely from the center of the top to both sides, improving the uniformity of air flow, so as to improve the uniformity of heating and humidifying tobacco leaves, meet the production requirements of a large number of tobacco leaves, and reduce environmental pollution. The present invention uses the heat of the first heating component to improve the humidification efficiency of the air in the wet film humidifier and can accurately control the humidity. Then, the humidified air is heated to a set temperature by the second heating component to accurately control the temperature and humidity of the hot air, improving the accuracy of heating and humidifying tobacco leaves. The hot air generated by the tobacco leaf heating and humidifying device can effectively avoid instant loss of the internal chemical components of tobacco leaves, and phenomena such as irreversible reduction of important chemical components such as total sugar and reducing sugar.

[0011] As a further improvement of the above technical solution, the first heating component includes a first heat exchange heater and a first auxiliary electric heater arranged in sequence along the air flow direction, and the second heating component includes a second heat exchange heater and a second auxiliary electric heater arranged in sequence along the air flow direction.

[0012] As a further improvement of the above technical solution, the low-intensity tobacco leaf heating, humidifying and rehumidifying system further includes a heat source device. The heat source device includes a heating unit and a hot water circulation component. The hot water circulation component includes a power water pump and a hot water exchanger connected in sequence. The downstream ends of the hot water exchanger are respectively connected to the inlets of the first heat exchange heater and the second heat exchange heater, and the upstream ends of the hot water exchanger are respectively connected to the outlets of the first heat exchange heater and the second heat exchange heater. A first regulating valve is provided at the inlet of the first heat exchange heater, and a second regulating valve is provided at the inlet of the second heat exchange heater. The power water pump is installed at the downstream end or the upstream end of the hot water exchanger, and the heating unit is used to heat the water flowing through the hot water exchanger.

[0013] As a further improvement of the above technical solution, the hot water circulation component further includes a water storage device. The water storage device is connected in series at the downstream end of the hot water exchanger. The water storage device is provided with a water discharge pipeline connected to the upstream end of the hot water exchanger, and a water discharge valve is provided on the water discharge pipeline.

[0014] As a further improvement of the above technical solution, the hot water circulation component further includes a temperature adjustment pipeline, which is respectively connected in parallel to the first heat exchange heater and the second heat exchange heater, and a temperature adjustment valve is provided on the temperature adjustment pipeline.

[0015] As a further improvement of the above technical solution, the heating unit includes an air heat exchanger, a compressor and an expansion valve. The hot water exchanger is provided with a hot water side for heat exchange and a refrigerant side for heat exchange. The air heat exchanger, the compressor, the refrigerant side and the expansion valve are connected in a closed loop to form a heat pump pipeline, and the hot water side is communicated with the power water pump.

[0016] As a further improvement of the above technical solution, a plurality of air return openings are provided. The plurality of air return openings are arranged at intervals along the axial direction of the air return branch pipe on the outer peripheral wall of the air return branch pipe, and the diameters of the plurality of air return openings are gradually increased from top to bottom along the air return branch pipe.

[0017] As a further improvement of the above technical solution, a connecting pipe is connected between the two air return pipes to form a main air return channel. One of the air return pipes is connected to the air inlet. The inner diameter of the main air return channel is gradually reduced from the air inlet to the end. An air return adjustment valve is provided between the air return pipe and the air inlet, a air supply adjustment valve is provided between the air supply pipe and the air outlet, and a fresh air inlet is provided at one end of the air handling unit close to the air inlet. The fresh air inlet is connected to a fresh air pipe equipped with a fresh air adjustment valve.

[0018] As a further improvement of the above technical solution, the wet film humidifier includes a wet film body and a water spraying system. The water spraying system includes a water spraying pipe located at the top of the wet film body and a water supply component communicated with the water spraying pipe. The water spraying pipe is horizontally arranged at the top of the wet film body. A plurality of water spraying openings arranged at intervals along the axial direction are provided at the top of the outer peripheral wall of the water spraying pipe. The water spraying pipe is rotatably adjustable around its own axis. The water supply component includes a water receiving tray, a circulating water tank and a circulating water pump connected in sequence. The outlet of the circulating water pump is connected to the water spraying pipe, and the water receiving tray is arranged at the bottom of the wet film body;

[0019] The heating and humidifying device further includes an air filtering component, which is arranged in the air handling unit and on the upstream side of the first heating component. The air filtering component includes a primary efficiency plate filter and a medium efficiency bag filter.

[0020] In addition, the present invention also provides a low-intensity tobacco leaf heating, humidifying and conditioning process method, which is applicable to the low-intensity tobacco leaf heating, humidifying and conditioning system. The low-intensity tobacco leaf heating, humidifying and conditioning process method includes:

[0021] Place the tobacco leaves in the humidifying chamber body. According to the required temperature and humidity of the humidifying chamber body, start the heating and humidifying device. Under the operation of the fan assembly, heat the air to be humidified through the first heating assembly to the first preset air temperature to form high-temperature hot air;

[0022] The heated high-temperature hot air passes through the wet film humidifier, and the heat of the high-temperature hot air vaporizes water molecules to form water vapor, which is mixed into the hot air to quickly humidify the hot air and humidify it to the first preset humidity to form wet air;

[0023] The humidified wet air passes through the second heating assembly, and the second heating assembly heats the wet air to the second preset air temperature to form humidified and heated hot air;

[0024] Send the humidified and heated hot air into the humidifying chamber body through the air supply pipe. The hot air blows down from the top of the humidifying chamber body through multiple air supply ports and flows to both sides of the humidifying chamber body to humidify and heat the tobacco leaves stored in the humidifying chamber body. The air is recovered from multiple air return branch pipes on both sides of the humidifying chamber body. The air enters the air return branch pipes from the lower air return port, is collected through the air return pipe and flows back to the heating and humidifying device for reheating and humidifying to achieve circular flow.

[0025] Other features and advantages of the present invention will be described in the following description, and in part will be obvious from the description, or will be understood by implementing the present invention. Brief Description of the Drawings

[0026] The following further describes the present invention in conjunction with the drawings and embodiments;

[0027] Figure 1 is a schematic diagram of one embodiment of the low-intensity tobacco leaf heating and humidifying and conditioning system provided by the present invention;

[0028] Figure 2 is a schematic diagram of one embodiment of the heating and humidifying device provided by the present invention;

[0029] Figure 3 is a schematic diagram of the side view of the interior of one embodiment of the humidifying chamber body provided by the present invention;

[0030] Figure 4 is a schematic diagram of one embodiment of the air supply pipe provided by the present invention;

[0031] Figure 5 is a schematic diagram of one embodiment of the air return pipe provided by the present invention;

[0032] Figure 6 is a schematic structural diagram of one embodiment of the wet film humidifier provided by the present invention;

[0033] Figure 7 is a cross-sectional view of the water spraying pipe provided by the present invention in a normal working position;

[0034] Figure 8 is a cross-sectional view of the water spraying pipe provided by the present invention in a protection position;

[0035] Figure 9 is a schematic diagram of one embodiment of the heat source device provided by the present invention;

[0036] Reference numerals in the attached drawings:

[0037] Heating and humidifying device 100; air handling unit 110; air inlet 111; air outlet 112; inspection door 113; fresh air inlet 114; fresh air pipe 115; fresh air regulating valve 116; air filtration assembly 117; wet film humidifier 120; wet film body 121; water spraying pipe 122; water spraying opening 1221; water receiving tray 123; fan assembly 130; first heat exchange heater 140; first regulating valve 141; first auxiliary electric heater 150; second heat exchange heater 160; second regulating valve 161; second auxiliary electric heater 170; one-way throttle valve 180;

[0038] Moistening and conditioning chamber device 200; moistening and conditioning chamber body 210; air supply pipe 220; air supply opening 221; air return pipe 230; air return branch pipe 231; air return opening 232; tee joint 233; connecting pipe 234; communicating pipe 240; air return regulating valve 250; air supply regulating valve 260;

[0039] Heat source device 300; heating unit 310; air heat exchanger 311; compressor 312; expansion valve 313; hot water circulation assembly 320; power water pump 321; hot water exchanger 322; water storage tank 323; water discharge pipe 324; water discharge valve 325; temperature regulating pipe 326; temperature regulating valve 327; water replenishing pipe 328; water replenishing valve 329. Detailed implementation manners

[0040] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up and down, etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0042] In the description of the present invention, "a plurality of" means more than two. If the first and the second are described only for the purpose of distinguishing technical features, they cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0043] In the description of the present invention, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0044] Next, the technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the following described embodiments are part of the embodiments of the present invention, not all embodiments.

[0045] In the prior art, tobacco leaves are generally temporarily stored in a conditioning room through a storage rack, and heated and humidified by manually spraying steam. In actual operation, the heating and humidifying of tobacco leaves are uneven, the chemical components of tobacco leaves will be irreversibly reduced, and the efficiency is low, making it difficult to adapt to the storage requirements of a large number of tobacco leaves. Moreover, the gas after heating and humidifying the tobacco leaves is discharged outwards, causing air pollution, and the current conventional heating and humidifying equipment is difficult to accurately control the temperature and humidity of the hot air, and the efficiency of heating and humidifying the hot air is low, thus making it difficult to meet the heating and humidifying requirements of tobacco leaves.

[0046] Furthermore, the present invention provides a low-intensity tobacco leaf heating and humidifying conditioning system, which solves the problem of uneven heating and humidifying of tobacco leaves, meets the storage requirements of a large number of tobacco leaves, can effectively reduce environmental pollution, and can also accurately control the temperature and humidity of hot air with high efficiency.

[0047] As Figure 1 shown, the low-intensity tobacco leaf heating and humidifying conditioning system of this embodiment includes: a heating and humidifying device 100 and a conditioning room device 200.

[0048] Specifically, as Figure 2 shown, the heating and humidifying device 100 includes an air cabinet 110, a wet film humidifier 120, a first heating component, a second heating component and a fan assembly 130. The air cabinet 110 is in the structure of an air box, and a straight-through air duct is provided inside the air cabinet 110. An air inlet 111 and an air outlet 112 are respectively arranged at both ends of the air cabinet 110. The air inlet 111 is used for the entry of air, and the air outlet 112 is used for the discharge of hot air. A plurality of inspection doors 113 are arranged on the side wall of the air cabinet 110 to facilitate internal inspection.

[0049] The first heating component, the wet film humidifier 120, and the second heating component of this embodiment are sequentially installed in the air handling unit 110 along the direction from the air inlet 111 to the air outlet 112. It can be understood that the first heating component is arranged on the upstream side of the wet film humidifier 120, while the second heating component is arranged on the downstream side of the wet film humidifier 120.

[0050] The fan assembly 130 is installed in the air handling unit 110. Specifically: The fan assembly 130 of this embodiment is arranged in the air handling unit 110 and is located on the downstream side of the second heating component, and the fan assembly 130 provides power for the flow of air.

[0051] During operation, first, the air to be humidified is heated by the first heating component to the set air temperature to form high-temperature hot air. Then, the heated high-temperature hot air passes through the wet film humidifier 120, and the heat of the high-temperature hot air vaporizes water molecules to form water vapor, which is mixed into the hot air to achieve rapid humidification of the hot air and humidify it to the set humidity to form wet air. Finally, the humidified wet air passes through the second heating component, and the second heating component heats the wet air to the set temperature to form humidified and heated hot air.

[0052] The present invention uses the heat of the first heating component to improve the humidification efficiency of the air in the wet film humidifier 120, and can accurately control the humidity. Then, the second heating component heats the humidified air to the set temperature to achieve accurate control of the temperature and humidity of the hot air, improve the accuracy of heating and humidifying the tobacco leaves. The hot air generated by the tobacco leaf heating and humidifying device 100 can effectively avoid causing instantaneous loss of the internal chemical components of the tobacco leaves, and phenomena such as irreversible reduction of important chemical components such as total sugar and reducing sugar.

[0053] As Figure 1 and 3 As shown, the conditioning chamber device 200 of this embodiment includes a conditioning chamber body 210, a supply air duct 220, and a return air duct 230. The heating and humidifying device 100 of this embodiment is installed on the outer wall of the conditioning chamber body 210. The wall of the conditioning chamber body 210 of this embodiment can adopt heat-insulating and moisture-proof materials to insulate and moisture-proof the conditioning chamber body 210 and avoid the influence of the outside on the tobacco leaves inside.

[0054] The supply air duct 220 of this embodiment is connected to the air outlet 112, and the supply air duct 220 is arranged inside the top of the conditioning chamber body 210. During installation, the supply air duct 220 is hoisted on the top of the conditioning chamber body 210 through a bracket. Taking the supply air duct 220 extending in the front-back direction as an example in this embodiment, in other embodiments, the supply air duct 220 can extend in other directions. A plurality of supply air outlets 221 are evenly distributed on the outer periphery of the supply air duct 220, and the supply air outlets 221 are distributed along the axial direction of the supply air duct 220.

[0055] AsFigure 4 As shown, a plurality of air supply outlets 221 in this embodiment are distributed on the left and right sides of the bottom of the air supply duct 220. The air supply outlets 221 are arranged to be inclined towards the left and right side walls of the conditioning chamber body 210, so that the heated and humidified air is blown obliquely from the center of the top of the conditioning chamber body 210 to the left and right sides through the air supply duct 220. When the tobacco leaves are stored through the storage racks, the storage racks are distributed on the left and right sides of the air supply duct 220, so that the air can directly blow on the storage racks on both sides to improve the efficiency of heating and humidification.

[0056] The air supply duct 220 of this embodiment is arranged on the center line of the top of the conditioning chamber body 210, so that the air blowing on both sides is uniform, and the air supply outlets 221 on the left and right sides are symmetrically distributed, so that the heating and humidification of the tobacco leaves on both sides are as consistent as possible.

[0057] The return air duct 230 is connected to the air inlet 111. There are two return air ducts 230, which are respectively located on the left and right sides in the circumferential direction of the air supply duct 220, and are located at the tops of the opposite side walls of the conditioning chamber body 210. It can be understood that return air ducts 230 are provided at the tops of the left and right sides of the conditioning chamber body 210, and the return air duct 230 is arranged in parallel with the air supply duct 220, and the return air duct 230 also extends in the front-rear direction.

[0058] As Figure 5 shown, a plurality of downwardly extending return air branches 231 are connected to the return air duct 230 of this embodiment. The plurality of return air branches 231 are arranged at intervals in the front-rear direction. The lower part of the return air branch 231 is provided with a return air outlet 232. In the conditioning chamber body 210, the air supply outlet 221 and the return air outlet 232 are arranged at intervals in the left-right direction and form a certain height difference. The air supply outlet 221 is located above the return air outlet 232. After the air blown out from the air supply outlet 221 heats and humidifies the tobacco leaves, it flows downward, and then is recovered through the return air outlet 232. Under the attraction of the return air outlet 232, the air flows from the middle to the left and right sides to realize the flow of air.

[0059] Under the suction of the plurality of return air branches 231, the air in the conditioning chamber body 210 flows obliquely downward from the center of the top to the left and right sides, improving the uniformity of air flow, so as to improve the uniformity of heating and humidifying the tobacco leaves and meet the production requirements of a large number of tobacco leaves.

[0060] During use, the tobacco leaves are stored in the conditioning chamber body 210. According to the temperature and humidity of the conditioning chamber body 210, the heating and humidifying device 100 is started. Under the operation of the fan assembly 130, first, the air to be humidified is heated by the first heating component to the set air temperature to form high-temperature hot air. Then, the heated high-temperature hot air passes through the wet film humidifier 120, and the heat of the high-temperature hot air vaporizes water molecules to form water vapor, which is mixed in the hot air to quickly humidify the hot air to the set humidity to form humid air. Finally, the humidified air passes through the second heating component, and the second heating component heats the humid air to the set temperature to form heated and humidified hot air. The heated and humidified hot air enters the conditioning chamber body 210 through the air supply pipe 220. The air is blown downward from the top of the conditioning chamber body 210 through multiple air supply openings 221 and flows toward both sides of the conditioning chamber body 210 to heat and humidify the tobacco leaves stored in the conditioning chamber body 210. Then, the air is recovered from multiple return air branch pipes 231 on both sides of the conditioning chamber body 210. The air enters the return air branch pipes 231 from the lower return air openings 232, is collected through the return air pipe 230 and flows back to the heating and humidifying device 100 for reheating and humidifying to achieve circular flow.

[0061] Under the suction of the multiple return air branch pipes 231 of the present invention, the air in the conditioning chamber body 210 flows obliquely downward from the center of the top to both sides, improving the uniformity of air flow, thereby improving the uniformity of heating and humidifying the tobacco leaves, meeting the production requirements of a large quantity of tobacco leaves, and reducing environmental pollution. The present invention uses the heat of the first heating component to improve the humidifying efficiency of the air in the wet film humidifier 120 and can accurately control the humidity. Then, the second heating component heats the humidified air to the set temperature to accurately control the temperature and humidity of the hot air, improving the accuracy of heating and humidifying the tobacco leaves. The hot air generated by the tobacco leaf heating and humidifying device 100 can effectively avoid instant loss of the internal chemical components of the tobacco leaves, and phenomena such as irreversible reduction of important chemical components such as total sugar and reducing sugar.

[0062] As Figure 5 shown, the present embodiment is provided with multiple return air openings 232. The multiple return air openings 232 are arranged at intervals along the axial direction of the return air branch pipes 231. The return air openings 232 are arranged on the outer peripheral wall of the return air branch pipes 231 and face the side of the center line of the conditioning chamber body 210. The air flows into the return air branch pipes 231 from the multiple return air openings 232, improving the return air effect.

[0063] Among them, the caliber sizes of the multiple return air openings 232 gradually increase from top to bottom along the return air branch pipes 231. The caliber of the lower return air openings 232 is larger than that of the upper return air openings 232, so that the air can flow downward as much as possible to increase the flow range and prevent the tobacco leaves at the lower part from being unable to contact the air.

[0064] As Figure 1 shown, a communicating pipe 240 is connected between two return air pipes 230 of this embodiment. One of the return air pipes 230 extends outside the moisture conditioning chamber body 210 and is connected to the air inlet 111. Moreover, the two return air pipes 230 and the communicating pipe 240 form a main return air passage, and the inner diameter of the main return air passage is gradually reduced from the air inlet 111 towards the end, so as to improve the return air capacity at the end and make the return air more uniform.

[0065] A return air regulating valve 250 is provided between the return air pipe 230 and the air inlet 111 of this embodiment, and the return air volume is controlled by the return air regulating valve 250.

[0066] A supply air regulating valve 260 is provided between the supply air pipe 220 and the air outlet 112 of this embodiment, and the supply air volume is controlled by the supply air regulating valve 260.

[0067] In some embodiments, a humidity sensor and a temperature sensor can be provided in the moisture conditioning chamber body 210 to detect the real-time humidity and temperature in the moisture conditioning chamber body 210, and according to the required humidity and temperature, the power of the return air regulating valve 250, the supply air regulating valve 260 and the heating and humidifying device 100 is controlled to achieve automatic control.

[0068] For the convenience of assembly, as Figure 5 shown, the return air pipe 230 of this embodiment includes multiple connecting pipes 234 and multiple three-way connectors 233. The multiple connecting pipes 234 are connected together through the multiple three-way connectors 233. Specifically, two adjacent connecting pipes 234 are respectively connected to two of the ports of the three-way connector 233, and the other port of the three-way connector 233 is connected to the return air branch pipe 231. During transportation, the connecting pipes 234, the three-way connectors 233 and the return air branch pipe 231 can be disassembled and packed, and then assembled during installation.

[0069] One end of the air handling unit 110 of this embodiment near the air inlet 111 is provided with a fresh air inlet 114. As Figure 1 shown, the fresh air inlet 114 is connected to a fresh air pipe 115 equipped with a fresh air regulating valve 116. When outside air needs to be supplemented, the fresh air regulating valve 116 is opened, and the external fresh air enters the fresh air inlet 114, and then enters the moisture conditioning chamber body 210 after being heated and humidified.

[0070] The wet film humidifier 120 of this embodiment is a vaporizing humidifier. As Figure 6As shown, the wet film humidifier 120 includes a wet film body 121 and a water sprinkling system. The water sprinkling system includes a water sprinkling pipe 122 located at the top of the wet film body 121 and a water supply component connected to the water sprinkling pipe 122. The water supply component is used to transport water to the water sprinkling pipe 122, and the water sprinkling pipe 122 moistens the wet film body 121 by sprinkling water. When the hot air passes through the moistened wet film body 121, the water molecules are vaporized into water vapor. Therefore, it is not only clean, but also will not have the "white powder" phenomenon, and will not cause scaling and corrosion to the fan and the air duct.

[0071] The wet film body 121 adopts a polymer fiber wet film, which has excellent antibacterial and anti-mildew functions, high efficiency and energy saving, and low pressure resistance.

[0072] The water spray pipe 122 of this embodiment is horizontally arranged on the top of the wet film body 121. Figure 7 As shown, a plurality of water sprinkling openings 1221 arranged at intervals along the axial direction are provided on the top of the outer peripheral wall of the water sprinkling pipe 122, and water flows out from the water sprinkling openings 1221 to achieve a water sprinkling effect.

[0073] In some embodiments, the water spray pipe 122 is adjustable and rotatable around its own axis. During operation, the wind is heated by the first heating component before passing through the wet film body 121. Under normal operation, the wetness of the wet film body 121 is difficult to withstand high temperature conditions, and the wet film material in the humidifier is easily burned or even ignited.

[0074] If the air temperature after being heated by the first heating component is higher than the set value, the water spray pipe 122 can be driven to rotate. Figure 8 As shown, the water sprinkling port 1221 is directed downward toward the wet film body 121, and water is directly poured onto the wet film body 121 to increase the humidity and reduce the temperature. On this basis, the water supply of the water supply component can be increased to further improve the water sprinkling effect and ensure the safety of the humidifier material. Under normal operating conditions, the water sprinkling pipe 122 rotates to an angle where the water sprinkling port 1221 is directed upward. At this time, after the liquid level inside the water sprinkling pipe 122 overflows the water sprinkling port 1221, water will flow out from the water sprinkling port 1221. Out, and sprinkle downward along the outer peripheral wall of the water sprinkling pipe 122 to form a wet film in the wet film body 121 to achieve a humidification effect. The present technology changes the angle of the water sprinkling pipe 122 so that the water sprinkling port 1221 has two positions, namely a normal working position and a protective position. The water sprinkling port 1221 in the protective position is directly downward and acts as a water spray port. The water sprinkling port 1221 in the normal working position is upward to achieve a dripping wetting effect, thereby protecting the wet film humidifier 120.

[0075] In some embodiments, the watering pipe 122 may be driven to rotate by an electric driving structure.

[0076] Furthermore, if Figure 2As shown in the figure, the water supply component of this embodiment includes a water receiving tray 123, a circulation water tank (not shown in the figure), and a circulation water pump (not shown in the figure) that are connected in sequence. The outlet of the circulation water pump is connected to a water spraying pipe 122. The water receiving tray 123 is arranged at the bottom of the wet film body 121. The water in the circulation water tank is pumped to the water spraying pipe 122 by the circulation water pump. The remaining water after passing through the wet film body 121 will flow back to the water receiving tray 123 and then back to the circulation water tank to achieve circulating water supply, achieving the effect of energy conservation and emission reduction.

[0077] As Figure 2 shown in the figure, this embodiment further includes an air filtration component 117. The air filtration component 117 is arranged in the air handling unit 110 and on the upstream side of the first heating component. The air filtration component 117 includes a primary plate filter and a medium efficiency bag filter arranged in sequence to achieve filtration and purification of the air.

[0078] Furthermore, as Figure 2 shown in the figure, the first heating component of this embodiment includes a first heat exchange heater 140 and a first auxiliary electric heater 150. The first heat exchange heater 140 is located on the upstream side of the first auxiliary electric heater 150. The second heating component includes a second heat exchange heater 160 and a second auxiliary electric heater 170. The second heat exchange heater 160 is located on the upstream side of the second auxiliary electric heater 170. During installation and use, the first heat exchange heater 140 is connected to an external heat source. The first heat exchange heater 140 has a partition heat exchange relationship with the air in the air handling unit 110 to heat the air in the air handling unit 110 through heat exchange, while the first auxiliary electric heater 150 directly heats the air in the air handling unit 110.

[0079] According to different operating modes, the first heat exchange heater 140 and the first auxiliary electric heater 150 can work independently or simultaneously. When working simultaneously, first, the air is heated by the first heat exchange heater 140, and according to the requirement of the humidification temperature, the first auxiliary electric heater 150 is used to further heat it to the set air temperature. In some other situations, for example, when the external heat source fails and the first heat exchange heater 140 does not work at this time, it is heated only by the first auxiliary electric heater 150; and the second heat exchange heater 160 and the second auxiliary electric heater 170 can work independently or simultaneously. When working simultaneously, the humidified ventilation is heated by the second heat exchange heater 160, and then the air is heated by the second auxiliary electric heater 170 to accurately heat it to the set air temperature. In some other working conditions, it is heated only by the second auxiliary electric heater 170.

[0080] Since the second heat exchange heater 160 and the first heat exchange heater 140 generally use hot water as the heat source to heat the air, in order to improve safety and avoid water accumulation, the first heating assembly of this embodiment further includes a first water tray disposed at the bottom of the first heat exchange heater 140, and the second heating assembly further includes a second water tray disposed at the bottom of the second heat exchange heater 160. The first water tray and the second water tray are used to collect the water seeping out of the heat exchanger.

[0081] Furthermore, as Figure 1 shown, the low-intensity tobacco leaf heating, humidifying and tempering system of this embodiment further includes a heat source device 300. As Figure 9 shown, the heat source device 300 includes a heating unit 310 and a hot water circulation assembly 320. The hot water circulation assembly 320 includes a power water pump 321 and a hot water exchanger 322 connected in sequence. The downstream ends of the hot water exchanger 322 are respectively connected to the inlets of the first heat exchange heater 140 and the second heat exchange heater 160, and the upstream ends of the hot water exchanger 322 are respectively connected to the outlets of the first heat exchange heater 140 and the second heat exchange heater 160. The heating unit 310 is used to heat the water flowing through the hot water exchanger 322. During operation, the heating unit 310 heats the water flowing through the hot water exchanger 322. Under the operation of the power water pump 321, the hot water enters the first heat exchange heater 140 and the second heat exchange heater 160, and heats the air in the air cabinet 110. The water after heat exchange flows back to the hot water exchanger 322 and continues to be heated to achieve circulating heating.

[0082] As Figure 2 shown, a first regulating valve 141 is provided at the inlet of the first heat exchange heater 140 of this embodiment, and a second regulating valve 161 is provided at the inlet of the second heat exchange heater 160. The amount of hot water entering the first heat exchange heater 140 can be adjusted through the first regulating valve 141 to adjust the heating power of the first heat exchange heater 140, and the amount of hot water entering the second heat exchange heater 160 can be adjusted through the second regulating valve 161 to adjust the heating power of the second heat exchange heater 160.

[0083] Among them, the power water pump 321 can be installed at the downstream end or the upstream end of the hot water exchanger 322. In this embodiment, the power water pump 321 is installed at the upstream end of the hot water exchanger 322, that is, the cold water side.

[0084] During actual operation, the heating powers of the first heat exchange heater 140 and the second heat exchange heater 160 will fluctuate to a certain extent. At this time, the required amount of hot water will correspondingly decrease or increase. To reduce the adjustment of the operating power of the heating unit 310, the hot water circulation assembly 320 of this embodiment further includes a water storage tank 323. The water storage tank 323 is connected in series to the downstream end of the hot water exchanger 322. It can be understood that the water storage tank 323 is connected between the hot water exchanger 322 and the inlets of the first heat exchange heater 140 and the second heat exchange heater 160. When the demand for hot water decreases, the hot water coming out of the hot water exchanger 322 can be stored in the water storage tank 323. When the demand for hot water increases, the hot water is pumped out from the water storage tank 323. At the same time, the water storage tank 323 also has an energy storage effect, storing the heat, making the system operate stably, enabling all-weather operation, and the heating unit 310 can work intermittently.

[0085] And the water storage tank 323 is provided with a water discharge pipe 324 connected to the upstream end of the hot water exchanger 322. The water discharge pipe 324 is provided with a water discharge valve 325. Among them, the power water pump 321 is arranged between the water discharge valve 325 and the inlet of the hot water exchanger 322. When the water storage volume in the water storage tank 323 reaches a predetermined high value or when it is necessary to store the heat of the heating unit 310, the water discharge valve 325 can be opened, and the power water pump 321, the hot water exchanger 322 and the water storage tank 323 form a circulation loop, continuously heating and raising the temperature of the water. When the first heat exchange heater 140 and the second heat exchange heater 160 need hot water, only the opening degrees of the first regulating valve 141 and the second regulating valve 161 need to be adjusted. In this embodiment, one-way throttle valves 180 are installed at the outlets of the first heat exchange heater 140 and the second heat exchange heater 160 to prevent mutual influence between the first heat exchange heater 140 and the second heat exchange heater 160.

[0086] Furthermore, the hot water circulation assembly 320 of this embodiment further includes a temperature regulating pipe 326. The temperature regulating pipe 326 is respectively connected in parallel to the first heat exchange heater 140 and the second heat exchange heater 160. The temperature regulating pipe 326 is provided with a temperature regulating valve 327. It can be connected that one end of the temperature regulating pipe 326 of this embodiment is connected between the water storage tank 323 and the inlets of the first heat exchange heater 140 and the second heat exchange heater 160, and the other end of the temperature regulating pipe 326 is connected between the inlet of the power water pump 321 and the outlets of the first heat exchange heater 140 and the second heat exchange heater 160. When it is necessary to cool the hot water, the opening degree of the temperature regulating valve 327 can be adjusted to mix the returned cold water with the hot water for cooling. When it is necessary to heat the hot water, the water discharge valve 325 is opened.

[0087] The hot water circulation component 320 of this embodiment is connected with a water replenishing pipeline 328, and a water replenishing valve 329 is provided on the water replenishing pipeline 328. The water replenishing pipeline 328 is connected to the inlet of the power water pump 321 to replenish water for the hot water circulation component 320.

[0088] The heating unit 310 of this embodiment includes an air heat exchanger 311, a compressor 312, and an expansion valve 313. The hot water exchanger 322 is provided with a hot water side and a heat exchange refrigerant side for mutual heat exchange. The air heat exchanger 311, the compressor 312, the heat exchange refrigerant side, and the expansion valve 313 are connected in a closed loop to form a heat pump pipeline, and the hot water side is communicated with the power water pump 321.

[0089] Using the reverse cycle principle, with a relatively small amount of electric energy, it absorbs the low-temperature heat energy in the air, then compresses it through the compressor 312 to turn it into high-temperature heat energy, and finally transfers the high-temperature heat energy to the hot water side to heat the water. Under the condition of consuming the same amount of electric energy, it can absorb heat equivalent to 3 - 4 times the electric energy for heating.

[0090] Adopting a heat pump for air heating can effectively save heating energy consumption, and at the same time provides a feasibility verification and expandability for the subsequent reuse of waste energy such as steam condensate and exhaust hot air generated by the production line.

[0091] The present invention also proposes a low-intensity tobacco leaf heating, humidifying and tempering process method, which is applicable to a low-intensity tobacco leaf heating, humidifying and tempering system. The low-intensity tobacco leaf heating, humidifying and tempering process method includes:

[0092] Store the tobacco leaves in the tempering chamber body 210. According to the required temperature and humidity of the tempering chamber body 210, start the heating and humidifying device 100. Under the operation of the fan assembly 130, heat the air to be humidified through the first heating component to the first preset air temperature to form high-temperature hot air.

[0093] The heated high-temperature hot air passes through the wet film humidifier 120, and the heat of the high-temperature hot air vaporizes water molecules to form water vapor, which is mixed in the hot air to quickly humidify the hot air and humidify it to the first preset humidity to form wet air.

[0094] The humidified wet air passes through the second heating component, and the second heating component heats the wet air to the second preset air temperature to form humidified and heated hot air.

[0095] The humidified and heated hot air enters the conditioning chamber body 210 through the air supply duct 220. The hot air blows downward from the top of the conditioning chamber body 210 through multiple air supply openings 221 and flows toward both sides of the conditioning chamber body 210, heating and humidifying the tobacco leaves stored in the conditioning chamber body 210. The air is recovered from multiple return air branch pipes 231 on both sides of the conditioning chamber body 210. The air enters the return air branch pipes 231 from the lower return air opening 232, is collected through the return air duct 230 and flows back to the heating and humidifying device 100 for reheating and humidifying to achieve circular flow.

[0096] In automatic operation, after the tobacco leaves completely enter the conditioning chamber body 210 and the doors and windows are closed, after clicking to enter the automatic operation mode, the system automatically starts the entire low-intensity heating and humidifying conditioning process, which is divided into the following steps;

[0097] First is the heating and humidification replenishment stage. The system adjusts the temperature and humidity in the conditioning chamber body 210 to 35°C and 40%. The time for this stage is 30 minutes.

[0098] After reaching the heating and humidification replenishment stage, it automatically enters the low-intensity heating and humidifying stage. The system adjusts the temperature and humidity in the conditioning chamber body 210 to 35°C and 75%. The time for this stage is 30 minutes.

[0099] After reaching the parameters, it automatically enters the low-intensity conditioning stage. The system keeps the temperature and humidity in the conditioning chamber body 210 constant at 35°C and 75%. The time for this stage is 240 minutes.

[0100] After the time ends, the system automatically enters the end buffer stage. The system adjusts the room temperature and humidity to 25°C and 60%. This stage takes 30 minutes. The system ends the operation and the automatic operation cycle ends.

[0101] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0102] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present invention.

Claims

1. A low-intensity tobacco leaf heating, humidifying and tempering system, characterized in that Comprising: A heating and humidifying device, including an air handling unit, a wet film humidifier, a first heating component, a second heating component and a fan component. The air handling unit is provided with an air inlet and an air outlet. The first heating component, the wet film humidifier and the second heating component are sequentially installed in the air handling unit along the direction from the air inlet to the air outlet, and the fan component is installed in the air handling unit; A conditioning room device, including a conditioning room body, a supply air duct and a return air duct. The supply air duct is connected to the air outlet, and is fixedly arranged along the center line of the top of the conditioning room body. A plurality of supply air outlets are evenly distributed on the outer periphery of the supply air duct. The return air duct is connected to the air inlet, and there are two return air ducts, which are respectively arranged on both circumferential sides of the supply air duct and at the tops of the opposite side walls of the conditioning room body. The return air duct is connected to a plurality of downwardly extending return air branch pipes, and return air inlets are arranged at the lower parts of the return air branch pipes.

2. The low-intensity tobacco leaf heating, humidifying and conditioning system according to claim 1, wherein: The first heating component includes a first heat exchange heater and a first auxiliary electric heater arranged in sequence along the wind direction, and the second heating component includes a second heat exchange heater and a second auxiliary electric heater arranged in sequence along the wind direction.

3. The low-intensity tobacco leaf heating, humidifying and conditioning system according to claim 2, wherein: The low-intensity tobacco leaf heating, humidifying and conditioning system further includes a heat source device, which includes a heating unit and a hot water circulation component. The hot water circulation component includes a power water pump and a hot water exchanger connected in sequence. The downstream ends of the hot water exchanger are respectively connected to the inlets of the first heat exchange heater and the second heat exchange heater, and the upstream ends of the hot water exchanger are respectively connected to the outlets of the first heat exchange heater and the second heat exchange heater. A first regulating valve is arranged at the inlet of the first heat exchange heater, and a second regulating valve is arranged at the inlet of the second heat exchange heater. The power water pump is installed at the downstream end or the upstream end of the hot water exchanger, and the heating unit is used to heat the water flowing through the hot water exchanger.

4. The low-intensity tobacco leaf heating, humidifying and conditioning system according to claim 3, wherein: The hot water circulation component further includes a water storage device, which is connected in series at the downstream end of the hot water exchanger. The water storage device is provided with a water discharge pipe connected to the upstream end of the hot water exchanger, and a water discharge valve is arranged on the water discharge pipe.

5. The low-intensity tobacco leaf heating, humidifying and conditioning system according to claim 4, wherein: The hot water circulation component further includes a temperature regulating pipe, which is respectively connected in parallel to the first heat exchange heater and the second heat exchange heater, and a temperature regulating valve is arranged on the temperature regulating pipe.

6. The low-intensity tobacco leaf heating, humidifying and conditioning system according to claim 3, wherein: The heating unit includes an air heat exchanger, a compressor and an expansion valve. The hot water exchanger is provided with a hot water side and a refrigerant side for heat exchange with each other. The air heat exchanger, the compressor, the refrigerant side and the expansion valve are connected in a closed loop to form a heat pump pipeline, and the hot water side is communicated with the power water pump.

7. The low-intensity tobacco leaf heating, humidifying and conditioning system according to claim 1, wherein: A plurality of air return openings are provided, and the plurality of air return openings are arranged at intervals along the axial direction of the air return branch pipe on the outer peripheral wall of the air return branch pipe, and the diameters of the plurality of air return openings are gradually increased from top to bottom along the air return branch pipe.

8. The low-intensity tobacco leaf heating, humidifying and conditioning system according to claim 7, wherein: A connecting pipe is connected between the two air return pipes to form a main air return channel, one of the air return pipes is connected to the air inlet, the inner diameter of the main air return channel is gradually reduced from the air inlet to the end, an air return regulating valve is provided between the air return pipe and the air inlet, a air supply regulating valve is provided between the air supply pipe and the air outlet, a fresh air inlet is provided at one end of the air cabinet close to the air inlet, and the fresh air inlet is connected to a fresh air pipe installed with a fresh air regulating valve.

9. The low-intensity tobacco leaf heating, humidifying and conditioning system according to claim 1, wherein: The wet film humidifier includes a wet film body and a water spraying system. The water spraying system includes a water spraying pipe located at the top of the wet film body and a water supply component communicated with the water spraying pipe. The water spraying pipe is horizontally arranged at the top of the wet film body, and a plurality of water spraying openings arranged at intervals along the axial direction are provided at the top of the outer peripheral wall of the water spraying pipe. The water spraying pipe is rotatably adjustable around its own axis. The water supply component includes a water receiving tray, a circulating water tank and a circulating water pump connected in sequence. The outlet of the circulating water pump is connected to the water spraying pipe, and the water receiving tray is arranged at the bottom of the wet film body; The heating and humidifying device further includes an air filtering component, and the air filtering component is arranged in the air cabinet and located on the upstream side of the first heating component. The air filtering component includes a primary plate filter and a medium-efficiency bag filter.

10. A process method for heating, humidifying and tempering low-strength tobacco leaves, characterized in that, Applicable to the low-intensity tobacco leaf heating, humidifying and conditioning system according to any one of claims 1 to 9, the low-intensity tobacco leaf heating, humidifying and conditioning process method includes: Storing the tobacco leaves in the conditioning chamber body, starting the heating and humidifying device according to the required temperature and humidity of the conditioning chamber body, and heating the air to be humidified through the first heating component under the operation of the fan component to a first preset air temperature to form high-temperature hot air; The heated high-temperature hot air passes through the wet film humidifier, and the heat of the high-temperature hot air vaporizes water molecules to form water vapor, which is mixed in the hot air to realize rapid humidification of the hot air and humidify it to a first preset humidity to form humid air; the humidified humid air passes through the second heating component, and the second heating component heats the humid air to a second preset air temperature to form humidified and heated hot air; The humidified and heated hot air enters the conditioning chamber through the air supply duct. The hot air is blown downward from the top of the conditioning chamber through multiple air supply outlets and flows toward both sides of the conditioning chamber, heating and humidifying the tobacco leaves stored in the conditioning chamber. The air is recovered through multiple return air branch pipes on both sides of the conditioning chamber. The air enters the return air branch pipes through the return air outlets at the lower part, is collected through the return air duct and flows back to the heating and humidifying device for reheating and humidifying, so as to achieve circular flow.

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