CN111713729A - Tobacco leaf baking device - Google Patents

Tobacco leaf baking device Download PDF

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Publication number
CN111713729A
CN111713729A CN202010777531.7A CN202010777531A CN111713729A CN 111713729 A CN111713729 A CN 111713729A CN 202010777531 A CN202010777531 A CN 202010777531A CN 111713729 A CN111713729 A CN 111713729A
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CN
China
Prior art keywords
chamber
heat pump
heating device
baking
heating
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Pending
Application number
CN202010777531.7A
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Chinese (zh)
Inventor
张明水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Wanting Equipment Technology Co ltd
Original Assignee
Sanming City Hongda Intelligent Agricultural Equipment Co ltd
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Publication date
Application filed by Sanming City Hongda Intelligent Agricultural Equipment Co ltd filed Critical Sanming City Hongda Intelligent Agricultural Equipment Co ltd
Priority to CN202010777531.7A priority Critical patent/CN111713729A/en
Publication of CN111713729A publication Critical patent/CN111713729A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/10—Roasting or cooling tobacco
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B1/00—Preparation of tobacco on the plantation
    • A24B1/02—Arrangements in barns for preparatory treatment of the tobacco, e.g. with devices for drying
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/02—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in buildings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sustainable Development (AREA)
  • Manufacture Of Tobacco Products (AREA)

Abstract

The invention relates to the technical field of tobacco leaf baking, and provides a tobacco leaf baking device, which comprises: the device comprises a baking chamber, a heating chamber, a heat pump heating device, a fuel heating device and a circulating fan; the circulating fan is arranged in the baking chamber or the heating chamber and is used for enabling air in the baking chamber and the heating chamber to circularly flow; the heat pump heating device comprises a heat pump outer machine and a heat pump inner machine, the fuel heating device comprises a burner and a first heat exchanger, and the first heat exchanger is connected with the burner through a pipeline; the heat pump inner unit and the first heat exchanger are arranged in the heating chamber and are respectively used for generating a baking heat source. The tobacco leaf baking device can still uninterruptedly provide a baking heat source under the condition of power failure, thereby greatly improving the stability of the baking device and effectively avoiding the condition of stopping the baking of the tobacco leaves midway due to the power failure.

Description

Tobacco leaf baking device
Technical Field
The invention relates to the technical field of tobacco leaf baking, in particular to a tobacco leaf baking device.
Background
The tobacco leaf baking device is used for baking fresh tobacco leaves which are just picked. The baking process of the tobacco leaves has two important parameters of dry-wet ball temperature control and baking time. The temperature control of the dry-wet ball is mainly divided into a yellowing period, a color fixing period and a dry-rib period, the requirement on the temperature control of baking is high, stable heat source supply is needed, and once the heat source supply is unstable and the precision of the dry-wet ball temperature is influenced, the quality of flue-cured tobacco is influenced; in general, the cooking time in smoking needs to be continuously 120 hours or more at a time, and the cooking cannot be interrupted halfway. Once the baking is interrupted halfway, the tobacco leaf quality is irreversibly influenced, and even the tobacco leaves in the whole oven are scrapped. Therefore, the continuous working stability of the tobacco leaf roasting device is an important index for evaluating the performance of the roasting device.
The heat pump is used as a heat source for baking tobacco leaves. The device has the advantages of accurate temperature control, high thermal efficiency, environmental protection and the like, greatly improves the baking quality of the tobacco leaves, is limited by the fact that the electric installation conditions cannot be popularized and used on a large scale, and is limited by the fact that the heat source of the heat pump shutdown device cannot be supplied due to the failure of the commercial power, and the tobacco leaves cannot be baked continuously.
The electric power installation conditions are specifically: when the standard tobacco curing barn adopts the heat pump as a heat source, the condition of installing a power supply of a single heat pump tobacco curing barn needs to be over 20KW generally, and particularly when the heat pump tobacco curing barn is built in a cluster, the existing power grid can not meet the requirement or the load of the power grid is limited generally. The cost of building new power supplies is high.
Risk due to power outage: when the commercial power supply is not normally supplied due to normal line maintenance or sudden conditions including weather, the heat pump is suspended due to power failure and heat source supply, the whole tobacco leaves cannot meet the requirements due to the temperature of the dry and wet balls, the quality of part of the tobacco leaves cannot meet the quality requirements, and even the whole tobacco leaves are scrapped.
Disclosure of Invention
Therefore, a tobacco leaf baking device is needed to be provided, and the tobacco leaf baking device is used for solving the technical problems that in the prior art, when the tobacco leaf baking device is shut down due to power failure and the heat pump cannot provide a heat source, a standby generator is used for supplying the circulating fan and an auxiliary heat source to guarantee the supply of the heat source, and the tobacco leaf baking device has high requirements on a power grid and is inconvenient to widely popularize and use.
In order to achieve the above object, the present invention provides a tobacco leaf curing apparatus, comprising: the device comprises a baking chamber, a heating chamber, a heat pump heating device, a fuel heating device, a controller and a circulating fan, wherein the controller is connected with the heat pump heating device, the fuel heating device and the circulating fan;
the circulating fan is arranged in the baking chamber or the heating chamber and is used for enabling air in the baking chamber and the heating chamber to circularly flow;
the fuel heating device comprises a combustor and a first heat exchanger, the first heat exchanger is connected with the combustor through a pipeline, and the combustor is used for combusting fuel to generate heat;
the heat pump heating device comprises a compressor and a second heat exchanger, and the compressor is connected with the second heat exchanger through a pipeline;
the second heat exchanger and the first heat exchanger are arranged in the heating chamber and are respectively used for heating air in the heating chamber.
Further, the fuel heating device comprises any one of a gas heating device, a fuel oil heating device, a methanol combustion heating device, a firewood combustion heating device and a biomass fuel heating device.
Further, the fuel heating device comprises a generator, and the controller controls the heat pump heating device and the fuel heating device;
when detecting that the commercial power stops the power supply, the controller controls the fuel heating device to start to work or increases the combustion amount of the fuel heating device, controls the generator to work, and provides a power supply for the circulating fan through the generator.
Further, the heat pump heating device is of a split structure and comprises an inner heat pump unit and an outer heat pump unit, the outer heat pump unit is arranged outside the heating chamber and the baking chamber, the compressor is arranged in the outer heat pump unit, and the inner heat pump unit comprises the second heat exchanger; or the heat pump heating device is of an integrated structure, the heat pump heating device is arranged on the side wall of the heating chamber, one end of the heat pump heating device is positioned in the heating chamber, and the other end of the heat pump heating device is positioned outside the heating chamber.
The temperature sensor is arranged in the baking chamber and used for detecting the dry and wet ball temperature of the baking chamber; the controller controls the heat pump heating device and the fuel heating device according to the dry-wet bulb temperature of the baking chamber, so that the temperature of the baking chamber reaches a preset value.
Further, the controller firstly uses the heat pump heating device, and judges whether the temperature of the baking chamber can reach the preset value when only the heat pump heating device is used; if not, the fuel heating device is started to enable the temperature of the baking chamber to reach the preset value.
Further, the controller preferentially reduces the combustion amount of the fuel heating device or turns off the fuel heating device when the temperature of the oven chamber reaches or exceeds the preset value.
Further, the rated power of the heat pump heating device is less than or equal to 7 KW;
the rated power of the fuel heating device is greater than or equal to 5 ten thousand kilocalories.
Further, the second heat exchanger is positioned on the air inlet side of the circulating fan, and the first heat exchanger is positioned on the air outlet side of the circulating fan; the arrangement density of the heat exchange tubes in the second heat exchanger is greater than that of the heat exchange tubes in the first heat exchanger.
Furthermore, the heating chamber is located the one end of baking the room along length direction, the heating chamber with bake the room and separate through the baffle, be provided with the intercommunication on the baffle the heating chamber with bake the circulation wind channel of room.
Different from the prior art, the technical scheme provides the tobacco leaf baking device which comprises two baking heat sources, namely the heat pump heating device and the fuel heating device, wherein the heat pump heating device has the advantages of small size, high heat efficiency and the like, and the energy consumption of the baking device can be effectively reduced.
And the baking device adopts the fuel heating device, and can still uninterruptedly provide a baking heat source under the condition of power failure, thereby greatly improving the stability of the baking device and effectively avoiding the condition of shutdown in midway of tobacco baking caused by power failure.
Furthermore, two baking heat sources of the heat pump heating device and the fuel heating device are adopted, so that the requirement of the baking device on the load of a power grid can be reduced, and the baking device can be widely applied to places with poor infrastructure and performance of the power grid.
Drawings
FIG. 1 is a schematic perspective view of a tobacco flue-curing apparatus according to an embodiment;
FIG. 2 is a schematic view showing an internal structure of the tobacco flue-curing apparatus according to the embodiment;
FIG. 3 is a cross-sectional view of the tobacco flue-curing apparatus according to an embodiment taken along a vertical direction;
FIG. 4 is a schematic view of the internal structure of the baking chamber according to the embodiment;
FIG. 5 is a partial enlarged view of portion A of FIG. 4;
FIG. 6 is a schematic view of a module of the tobacco flue-curing apparatus according to an embodiment;
FIG. 7 is a schematic perspective view of a burner according to an embodiment;
description of reference numerals:
1. a baking chamber;
11. an outer wall panel;
12. a top plate;
13. a partition plate;
101. erecting a rod;
102. hanging a tobacco rod;
103. hanging a lug;
2. a heating chamber;
21. an air inlet door;
31. a fuel heating device;
311. a combustion engine;
312. a first heat exchanger;
313. a mounting seat;
314. a smoke exhaust pipe;
32. a heat pump heating device;
321. a heat pump outdoor unit;
322. a heat pump indoor unit;
4. a circulating fan;
5. a controller;
6. a generator;
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1 to 7, the present embodiment provides a tobacco flue-curing apparatus. The tobacco leaf roasting device comprises a roasting chamber 1, a heating chamber 2, a circulating fan 4, a heat pump heating device 32 and a fuel heating device 31. The baking chamber 1 is used for hanging and hanging tobacco leaves to be baked, the heat pump heating device 32 and the fuel heating device 31 are used for generating a baking heat source, and the baking heat source heats air in the heating chamber 2 to generate high-temperature gas. Baking chamber 1 with heating chamber 2 intercommunication, circulating fan 4 set up in the heating chamber, be used for the messenger baking chamber 1 with the air circulation in the heating chamber 2 flows to the tobacco leaf of treating the toasting in the baking chamber 1 is toasted.
The tobacco leaf baking device is provided with the heat pump heating device 32 and the fuel heating device 31, so that tobacco leaves can be baked by the power grid for the heat pump heating device 32, and the fuel heating device 31 can be used for baking the tobacco leaves by burning fuels such as natural gas, diesel oil, methanol combustion heating devices, firewood combustion heating devices, biomass particle fuels and the like. Therefore, when the power grid is cut off and the like, the tobacco leaves can be roasted only by the fuel heating device 31, and the condition that the tobacco leaves are stopped in the middle of roasting due to the power failure can be effectively avoided.
In addition, the heat pump heating device 32 and the fuel heating device 31 in the tobacco leaf baking device can work cooperatively to provide a heat source for baking the tobacco leaves, so that the power number of the heat pump heating device 32 can be reduced, for example, the rated power of the heat pump heating device is reduced from the original 15KW to 6KW, thereby greatly reducing the load requirement of the heat pump heating device on a power grid, and being convenient for the tobacco leaf baking device to be widely applied to places with poor power grid infrastructure and poor power grid performance.
As shown in fig. 1 to 3, the present embodiment provides a tobacco leaf roasting apparatus. FIG. 1 is a schematic perspective view of a tobacco flue-curing apparatus according to an embodiment; FIG. 2 is a schematic view showing an internal structure of the tobacco flue-curing apparatus according to the embodiment; fig. 3 is a vertical sectional view of the tobacco flue-curing apparatus according to the embodiment.
This tobacco leaf roasting equipment includes: a baking chamber 1, a heating chamber 2, a heat pump heating device 32, a fuel heating device 31 and a circulating fan 4. Wherein, the baking chamber 1 can be formed by connecting a side wall plate 11 and a top plate 12, and the side wall plate 11 and the top plate 12 can be made of heat-insulating plates such as cotton plates and polyurethane plates. The heating chamber 2 is located at one end of the baking chamber 1 along the length direction (i.e. the direction indicated by the arrow Y in fig. 1, and the direction indicated by the arrow X is the width direction of the baking chamber 1), the heating chamber 2 is separated from the baking chamber 1 by a partition 13, and a circulating air duct 131 communicating the heating chamber and the baking chamber is arranged on the partition 13. Preferably, an air inlet door 21 is further disposed on a side plate of the heating chamber 2, the air inlet door 21 may be an electric air inlet machine, and an opening angle of the air inlet door 21 may be controlled by controlling a motor, so as to change an air inlet amount of the heating chamber 2.
As shown in fig. 4 and 5, fig. 4 is a schematic view of an internal structure of the baking chamber according to the embodiment, and fig. 5 is a partially enlarged view of a portion a in fig. 4. Wherein, be provided with a plurality of pole settings 101 in the baking chamber 1, the interval is provided with a plurality of hangers 103 on the pole setting 101, hangers 103 can be different shapes such as L shape, U-shaped. The tobacco leaves to be cured are fixed on the tobacco hanging rod 102, and the end part of the tobacco hanging rod 102 is connected with the hanging lug 103, so that the tobacco leaves are hung in the baking chamber 1 for baking.
The circulating fan 4 is provided in the heating chamber 2 to circulate air in the baking chamber 1 and the heating chamber 2, and as shown in fig. 3, in the present embodiment, the circulating fan 4 is provided in the heating chamber 2, and the direction of the arrow in the figure is the air circulation direction in the heating chamber 2 and the baking chamber 1.
As shown in fig. 1 and 2, the heat pump heating device 32 includes an inner heat pump unit 322 and an outer heat pump unit 321, and the fuel heating device includes a burner 311 and a first heat exchanger 312. The heat pump inner unit 322 of the heat pump heating device 32 and the first heat exchanger 312 of the fuel heating device 31 are disposed in the heating chamber 2, and the heat pump outer unit 321 and the fuel machine 311 are disposed outside the baking chamber 1 and the heating chamber 2.
The heat pump heating device 32 has a heat pump inner unit 322 and a heat pump outer unit 321 connected by a metal sealed pipeline, refrigerating media such as Freon circulate between the heat pump inner unit 322 and the heat pump outer unit 321, a compressor and an external heat exchanger are arranged in the heat pump outer unit 321, a second heat exchanger is arranged in the heat pump inner unit 322, and the compressor, the external heat exchanger and the second heat exchanger are connected by the metal sealed pipeline to form a sealed circulation pipeline. The refrigeration medium is compressed in the compressor of the heat pump external unit 321 to form a high-pressure high-temperature liquid medium, the high-pressure high-temperature liquid medium is conveyed into the second heat exchanger of the heat pump internal unit through the metal sealing pipeline, and the air flowing through the second heat exchanger in the heating chamber 2 is heated by the second heat exchanger. The refrigeration medium flowing out of the second heat exchanger is changed into a gas medium through the expansion valve, the gas medium enters the external heat exchanger, the external heat exchanger exchanges heat with external air, and the refrigeration medium flowing out of the external heat exchanger enters the compressor again for compression.
The fuel machine 311 is disposed outside the heating chamber 2 and the baking chamber 1, and is communicated with the first heat exchanger 312 in the heating chamber 2 through a pipe. The fuel machine 311 is used for burning fuel, converting chemical energy of the fuel into thermal energy, and the thermal energy enters the first heat exchanger 312 through the duct and heats air in the heating chamber 2 through the first heat exchanger 312. As shown in fig. 7, which is a schematic structural diagram of the first heat exchanger 312, a mounting seat 313 is disposed at a bottom of the first heat exchanger 312, and the first heat exchanger 312 is disposed on the ground through the mounting seat 313. The first heat exchanger 312 is further connected to a smoke exhaust pipe 314, and the smoke exhausted by the first heat exchanger 312 after exchanging is exhausted to the outside of the heating chamber 2 through the smoke exhaust pipe 314. The fuel heating device 31 includes any one of a gas heating device, a fuel heating device, and a biomass fuel heating device. Preferably, in the present embodiment, the fuel heating apparatus is a gas heating apparatus.
In the embodiment shown in fig. 1 to 3, the heat pump heating device is a split-type heat pump heating device, and includes an internal heat pump unit 322 and an external heat pump unit 321. In some embodiments, the heat pump heating device may also adopt an integrated structure, in which components such as the press, the second heat exchanger, and the like are disposed inside the same machine body, the machine body may be disposed on a side wall of the heating chamber 2, and one end of the integrated heat pump heating device (i.e., one end of the machine body) extends into the heating chamber 2 to heat air in the heating chamber; the other end of the heat pump heating device is exposed outside the heating chamber 2 and is used for discharging cold air generated by the heat pump to the outside air.
As shown in fig. 2 and 3, in the present embodiment, the arrangement density of the heat exchange tubes in the second heat exchanger is greater than the arrangement density of the heat exchange tubes in the first heat exchanger. The heat pump inner unit 322 and the second heat exchanger thereon are located on the air inlet side of the circulating fan 4, and the first heat exchanger 312 is located on the air outlet side of the circulating fan. Because the arrangement density of the heat exchange tubes in the second heat exchanger is greater than that, if the heat exchange tubes are arranged on the air outlet side of the circulating fan 4, the air flow blown out by the circulating fan 4 can be scattered, and in the embodiment, the second heat exchanger 322 is arranged on the air inlet side of the circulating fan 4, so that the air flow can be prevented from being scattered by the second heat exchanger, the wind resistance is reduced, and the air circulation efficiency between the heating chamber 2 and the baking chamber 1 is improved. As shown in fig. 2 and fig. 3, in the present embodiment, the heat pump indoor unit 322 is located above the circulating fan 4, the first heat exchanger 312 of the fuel heating device 31 is located below the circulating fan 4, and the air in the heating chamber 2 is heated by the heat pump indoor unit 322 and then by the first heat exchanger 312, so that the air meets the baking temperature requirement.
In other embodiments, the circulating fan 4 is of an upward air-out type, that is, the circulating fan 4 blows air from bottom to top in the heating chamber, the air inlet side of the circulating fan 4 is below the circulating fan, and the air outlet side is above the circulating fan. In this embodiment, the heat pump indoor unit 322 is disposed below the circulation fan 4, and the first heat exchanger 312 is disposed above the circulation fan 4.
The tobacco leaf baking device comprises two baking heat sources of the heat pump heating device and the fuel heating device, wherein the heat pump heating device has the advantages of small size, high heat efficiency and the like, and the energy consumption of the baking device can be effectively reduced. And the baking device adopts the fuel heating device, and the fuel heating device can still uninterruptedly provide a baking heat source under the condition that the heat pump heating device is powered off, so that the stability of the baking device is greatly improved, and the condition of stopping the baking device during baking tobacco leaves caused by power off is effectively avoided.
Furthermore, two baking heat sources of the heat pump heating device and the fuel heating device are adopted, so that the requirement of the baking device on the load of a power grid can be reduced, and the baking device can be widely applied to places with poor infrastructure and performance of the power grid.
In one embodiment, the heat pump heating device 32 is powered by commercial power from the power grid, and the rated power of the heat pump heating device is less than or equal to 7KW, and the rated power of the fuel heating device is greater than or equal to 5 ten thousand calories, which corresponds to 60 KW. Compared with the conventional single heat source type heat pump tobacco curing house with the same size and scale, the rated power of the heat pump is about 15KW, the tobacco leaf curing device in the embodiment can use commercial power, and the power consumption rated power is reduced by half.
As shown in fig. 2 and fig. 6, the tobacco flue-curing device further includes a controller 5 and a generator 6, and a temperature sensor is further disposed in the baking chamber, preferably, the temperature sensor is a wet-dry bulb temperature sensor, and the temperature sensor detects the temperature of the baking chamber by detecting the temperature of the wet-dry bulb in the baking chamber. The generator 6 and the temperature sensor are connected with the controller, the controller is further connected with a mains supply, and is connected with the heat pump heating device 32, the fuel heating device 31 and the circulating fan 4 in the above embodiment, and the controller controls the heat pump heating device 32, the fuel heating device 31, the circulating fan 4 and the generator to work. The controller detects the temperature of the baking chamber (namely, the temperature of the dry and wet balls) according to a temperature sensor arranged in the baking chamber 1, so that the heat pump heating device 32, the fuel heating device 31 and the circulating fan 4 are controlled to work, and the temperature of the baking chamber 1 reaches a preset value. In different embodiments, the controller may be an industrial personal computer, a single chip microcomputer, a PLC controller, or the like.
In an embodiment, the controller is further configured to detect whether the commercial power stops the power supply, and when detecting that the commercial power stops the power supply (i.e., the tobacco leaf curing device is powered off), control the fuel heating device to start operating or increase the combustion amount of the fuel heating device, and control the generator to operate, so as to provide power for the circulating fan through the power generation of the generator. The baking device power-off detection device can be provided with a current transformer through the power-off commercial power input end of the baking device, and the current transformer can input power-off when not detecting current.
When detecting that the commercial power stops supplying power and only the heat pump heating device 32 works, the controller controls the fuel heating device to ignite and work, provides a baking heat source for baking tobacco leaves, and detects whether the temperature in the baking chamber is kept at a preset value through the temperature sensor. When the heat pump heating device 32 and the fuel heating device 31 are both in working state during power failure, the controller can control and increase the combustion amount of the fuel heating device 31 to generate larger heat, so as to compensate for the heat reduction caused by the shutdown of the heat pump heating device.
Since the generator does not need to supply power to the heat pump heating device in the embodiment and is only used for supplying power to the circulating fan and/or the controller, a small generator with rated power less than 300W or 500W can be selected as the generator.
The tobacco leaf baking process is divided into three stages of withering, yellowing and drying, namely a three-stage baking process, and the requirements on baking temperature are different in the three stages, wherein in general, the withering temperature is controlled to be 30-40 ℃, and the yellowing and drying temperature is higher and can reach about 70 ℃ at most. And because the heat efficiency of the heat pump heating device 32 is higher, the heat pump heating device is preferentially used for heating when tobacco leaf baking is carried out, and the fuel heating device is started to assist the heat pump heating device for baking when the baking temperature is higher. The controller detects the current temperature of the baking chamber through the temperature sensor, judges whether the current temperature reaches a preset temperature value of the current baking stage, and controls the heat pump heating device and/or the fuel heating device according to the temperature of the baking chamber so that the temperature of the baking chamber reaches the preset value. For example, when the temperature of the baking chamber is at the yellowing stage of baking, the preset temperature value of the stage is 60 degrees, the controller determines whether the current temperature of the baking chamber detected by the temperature sensor reaches 60 degrees, if not, the power of the heat pump heating device 32 is increased, and if the maximum power of the heat pump heating device is reached, the fuel heating device is started to work or the fuel supply amount of the fuel heating device is increased, so that the current temperature of the baking chamber reaches 60 degrees.
When the controller detects that the current temperature of the baking chamber is higher than the preset value (for example, higher than the 60 degrees) in the current baking stage, the side control preferentially reduces the combustion amount of the fuel heating device or closes the fuel heating device, so that the generated heat is reduced. Through the control of the heat pump heating device 32 and the fuel heating device, the heat pump heating device can be used to the maximum extent, so that the fuel consumption is minimum, and the heat efficiency of the heat pump heating device is high, thereby reducing the energy consumption of the tobacco leaf baking device on the whole and achieving the purposes of energy conservation and emission reduction.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.

Claims (10)

1. A tobacco leaf curing apparatus, comprising: the device comprises a baking chamber, a heating chamber, a heat pump heating device, a fuel heating device, a controller and a circulating fan, wherein the controller is connected with the heat pump heating device, the fuel heating device and the circulating fan;
the circulating fan is arranged in the baking chamber or the heating chamber and is used for enabling air in the baking chamber and the heating chamber to circularly flow;
the fuel heating device comprises a combustor and a first heat exchanger, the first heat exchanger is connected with the combustor through a pipeline, and the combustor is used for combusting fuel to generate heat;
the heat pump heating device comprises a compressor and a second heat exchanger, and the compressor is connected with the second heat exchanger through a pipeline;
the second heat exchanger and the first heat exchanger are arranged in the heating chamber and are respectively used for heating air in the heating chamber.
2. The tobacco leaf curing apparatus according to claim 1, wherein the fuel heating apparatus comprises any one of a gas heating apparatus, an oil heating apparatus, a methanol combustion heating apparatus, a firewood combustion heating apparatus, and a biomass fuel heating apparatus.
3. The tobacco leaf curing apparatus according to claim 1, further comprising a generator, wherein the controller controls the heat pump heating apparatus and the fuel heating apparatus;
when detecting that the commercial power stops the power supply, the controller controls the fuel heating device to start to work or increases the combustion amount of the fuel heating device, controls the generator to work, and provides a power supply for the circulating fan through the generator.
4. The tobacco leaf curing device according to claim 3, wherein the heat pump heating device is a split structure and comprises an inner heat pump unit and an outer heat pump unit, the outer heat pump unit is arranged outside the heating chamber and the curing chamber, the compressor is arranged in the outer heat pump unit, and the inner heat pump unit comprises the second heat exchanger; or the heat pump heating device is of an integrated structure, the heat pump heating device is arranged on the side wall of the heating chamber, one end of the heat pump heating device is positioned in the heating chamber, and the other end of the heat pump heating device is positioned outside the heating chamber.
5. The tobacco leaf curing apparatus of claim 3, further comprising a temperature sensor disposed within the curing chamber for detecting a wet and dry bulb temperature of the curing chamber; the controller controls the heat pump heating device and the fuel heating device according to the dry-wet bulb temperature of the baking chamber, so that the temperature of the baking chamber reaches a preset value.
6. The tobacco leaf roasting device according to claim 5, wherein the controller firstly uses the heat pump heating device and judges whether the temperature of the roasting chamber can reach the preset value only when the heat pump heating device is used; if not, the fuel heating device is started to enable the temperature of the baking chamber to reach the preset value.
7. The tobacco leaf curing apparatus of claim 6, wherein the controller prioritizes reduction of the amount of combustion of the fuel heating means or turning off the fuel heating means when the temperature of the curing chamber reaches or exceeds the preset value.
8. The tobacco leaf curing apparatus of any one of claims 1 to 7, wherein the rated power of the heat pump heating means is less than or equal to 7 KW;
the rated power of the fuel heating device is greater than or equal to 5 ten thousand kilocalories.
9. The tobacco leaf curing apparatus according to claim 1, wherein the second heat exchanger is located on an air inlet side of the circulating fan, and the first heat exchanger is located on an air outlet side of the circulating fan; the arrangement density of the heat exchange tubes in the second heat exchanger is greater than that of the heat exchange tubes in the first heat exchanger.
10. The tobacco leaf curing apparatus according to claim 1, wherein the heating chamber is located at one end of the curing chamber in the length direction, the heating chamber and the curing chamber are separated by a partition plate, and a circulating air duct communicating the heating chamber and the curing chamber is provided on the partition plate.
CN202010777531.7A 2020-08-05 2020-08-05 Tobacco leaf baking device Pending CN111713729A (en)

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