CN210929591U - Fuel oil direct combustion type tobacco flue-curing house - Google Patents

Abstract

The utility model discloses a fuel direct combustion formula tobacco flue-curing house, including the heating chamber, be provided with fuel heating device in the heating chamber, fuel heating device includes: a fuel storage tank; an oil pump; the burner comprises an oil injection pipe body, a combustion pipe body, an igniter and a blower, wherein the oil injection pipe body receives fuel oil conveyed from an oil pump and sprays the fuel oil out of the oil injection pipe body to combust to generate flame; the heat dissipation structure comprises a heat dissipation cavity, wherein the combustion nozzle end of the combustion pipe body extends into the heat dissipation cavity, and heat generated by the combustor is dissipated into the heating chamber through the heat dissipation cavity so as to provide heat required by tobacco leaf baking in the tobacco flue-curing house. The utility model discloses only need on current tobacco flue-curing house basis transform can, the transformation cost is lower, and can not receive the influence of power consumption environment, for example the baking that has a power failure to cause is interrupted and the tobacco leaf is reported and is decreased.

Description

Fuel oil direct combustion type tobacco flue-curing house

Technical Field

The utility model relates to a fuel direct combustion formula tobacco flue-curing house belongs to tobacco flue-curing house technical field.

Background

The tobacco curing house is mainly used for curing tobacco leaves. The tobacco curing room comprises a heating chamber and a tobacco loading chamber, and after tobacco leaves are hung in the tobacco loading chamber, heat is supplied to the tobacco loading chamber through the heating chamber to complete the curing of the tobacco leaves. At present, the heating chamber generally adopts solid fuel or an electric heat converter using electric energy and a motor-driven electric power fan to implement a tobacco leaf baking process of hot air circulation. The solid fuel is mainly coal, and the use mode of the solid fuel is that a combustion furnace is arranged in a heating chamber, and the coal is combusted in the combustion furnace to generate heat so as to supply heat, but the mode has the problems of high energy consumption and serious environmental pollution, and is not beneficial to adjusting the heating temperature in baking.

The use of electric energy has the following problems: the power distribution equipment has high early investment cost and large power consumption of the electric heat conversion device, strict requirements on site selection limitation of a tobacco flue-curing house and erection of a power supply network cable are met, and power failure (common phenomenon of a rural power grid) in a power utilization peak period can cause baking interruption and tobacco leaf loss reporting.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the utility model provides a fuel direct combustion type tobacco flue-curing house, which solves the problems of large energy consumption and high cost in the heat supply of the prior tobacco flue-curing house.

The technical scheme of the utility model is that: the utility model provides a fuel direct combustion formula tobacco flue-curing house, includes tobacco flue-curing house, tobacco flue-curing house includes heating chamber and dress smoke chamber the heating chamber with be equipped with air intake and return air inlet on the partition wall of dress smoke chamber, the steam that the heating chamber produced is followed the air intake enters into in the dress smoke chamber, toast the back warp to the tobacco leaf the return air inlet flows back the circulation in the heating chamber be provided with fuel heating device in the heating chamber, fuel heating device includes:

the fuel storage tank is used for containing fuel;

the inlet end of the oil pump is connected with the fuel storage tank through an oil pipeline;

a burner, comprising:

the oil injection pipe body comprises an oil injection end and an oil supply end, and a pump-out port of the oil pump is connected with the oil supply end through an oil pumping pipeline;

the fuel injection pipe is arranged in the combustion pipe body and is close to the combustion nozzle end;

the igniter is arranged in the oil injection pipe body, is close to the oil injection end and is used for igniting fuel oil;

a blower, a blower outlet of which is arranged in the combustion pipe body and is positioned between the oil injection end and the closed end so as to convey air outside the tobacco flue-curing house to air required by combustion of fuel oil sprayed from the oil injection end;

the heat radiation structure is arranged in the heating chamber and comprises a heat radiation cavity, the combustion nozzle end of the combustion pipe body extends into the heat radiation cavity, so that flame generated by the combustor is sprayed into the heat radiation cavity, and the heat radiation cavity radiates heat into the heating chamber to provide the heat required by tobacco leaf baking in the tobacco flue-curing house.

Furthermore, the tobacco flue-curing house is also provided with a control component in a matching way;

a temperature and humidity detection device is arranged in the cigarette containing chamber and is electrically connected with the control assembly;

the cigarette box is characterized in that a moisture exhaust window is arranged in the cigarette containing chamber, a moisture exhaust fan is arranged on the moisture exhaust window, and the control end of the moisture exhaust fan is electrically connected with the control assembly.

Further, an electric valve is arranged on the oil injection pipe body;

the control assembly is electrically connected with the control end of the electric valve;

the control assembly is electrically connected with the control end of the igniter;

the control assembly is electrically connected with the control end of the blower;

when the temperature and humidity value detected by the temperature and humidity detection device exceeds a set value, the control assembly controls the opening and closing of the electric valve, the ignition of the igniter and the opening and closing of the air blower.

Furthermore, an exhaust branch pipe connected with the oil pumping pipeline in parallel is arranged at the pump outlet of the oil pump, and an exhaust valve is arranged on the exhaust branch pipe.

Further, the heat dissipation structure further comprises a plurality of heat pipes, wherein the heat pipes are arranged on the heat dissipation cavity, and the heat dissipation cavity transfers heat to the heat pipes, so that the heat pipes dissipate the heat to the heating chamber.

Furthermore, the oil pumping pipeline is connected with a plurality of oil supply ends of the burners through multi-way pipeline joints and oil pipelines, and the burners are arranged in different heating chambers of the tobacco curing barn.

The utility model has the advantages that: during baking, fuel oil is pumped from the fuel oil storage tank to the fuel oil injection pipeline by the oil pump and is sprayed out from the oil injection end, the fuel oil is ignited by the igniter, oxygen required by combustion of the fuel oil is supplied by the air blower, flame generated by combustion of the fuel oil is sprayed into the heat dissipation cavity, heat is dissipated into the heating chamber through the heat dissipation cavity and the heat conduction pipes, finally hot air is conveyed into the tobacco loading chamber from the air inlet to bake tobacco leaves, and air flow after baking returns to the heating chamber through the air return port to circulate. Compared with the existing solid fuel, the invention adopts fuel oil to burn and supply heat, thereby not only improving the burning efficiency and reducing the environmental pollution, but also reducing the baking cost, and simultaneously, the heating temperature can be quickly adjusted according to the process requirement. Compared with the existing electric energy heat supply, the invention adopts fuel oil combustion for heat supply, not only has lower modification cost, but also can be modified on the basis of the existing tobacco flue-curing house, and can not be influenced by the power consumption environment, such as baking interruption and tobacco leaf damage reporting caused by power failure.

Drawings

FIG. 1 is a schematic structural view of a direct fuel-fired tobacco flue-curing house according to an embodiment;

FIG. 2 is an enlarged schematic view of the fuel storage tank of FIG. 1;

FIG. 3 is an enlarged schematic view of the oil pump of FIG. 1;

FIG. 4 is an enlarged schematic view of the burner of FIG. 1;

FIG. 5 is a schematic view of the homogenizing plate of FIG. 4;

FIG. 6 is a schematic view of the heat dissipation structure and the tobacco flue-curing house shown in FIG. 1;

FIG. 7 is a control block diagram of the burner;

description of reference numerals:

100 fuel storage tanks, 200 oil pumps, 300 burners, 400 heat dissipation structures, 500 tobacco curing houses;

101 a cover, 102 a fuel outlet;

211 oil pipeline, 212 valves, 213 oil pumping pipeline, 214 exhaust branch pipes, 215 exhaust valves and 216 multi-channel pipeline joints;

310 oil injection pipe body, 311 oil injection end, 312 oil supply end, 313 electric valve, 320 combustion pipe body, 321 combustion nozzle end, 322 closed end, 323 uniform jet plate, 330 igniter and 340 blower;

410 heat dissipation cavity, 411 mounting holes, 412 exhaust pipes, 420 heat conduction bracket, 430 heat conduction pipe and 440 fan;

510 heating chamber, 520 smoke containing chamber, 530 partition wall, 540 air return opening and 550 air inlet.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 is a schematic view of an overall structure of a direct fuel-fired tobacco flue-curing house according to an embodiment. The tobacco flue-curing house 500 mainly comprises a heating chamber 510 and a tobacco containing chamber 520, wherein the tobacco containing chamber 520 is mainly used for containing tobacco and baking, and the heating chamber 510 mainly provides heat required for baking in the tobacco containing chamber 520. The heating chamber 510 is disposed adjacent to the tobacco loading chamber 520, the heating chamber 510 and the tobacco loading chamber 520 are usually separated by a partition 530, an air inlet 550 and an air return opening 540 are opened on the partition 530, hot air generated by the heating chamber 510 enters the tobacco loading chamber 520 from the air inlet 550, tobacco leaves are baked and then return to the heating chamber 510 through the air return opening 540 for circulation, and the circulation is completed after the baking.

For example, an air inlet 550 is formed at a lower portion of the partition 530, and an air return 540 is formed at an upper portion of the partition 530 to form the ascending flue-cured tobacco house 500, or an air inlet 550 is formed at an upper portion of the partition 530, and an air return 540 is formed at a lower portion of the partition 530 to form the descending flue-cured tobacco house 500. In the baking room field, the air inlet 550 and the air return 540 are the same opening structure, and the difference in name is mainly due to which opening the hot air in the heating chamber 510 enters into the smoke containing chamber 520, and from which opening the hot air in the smoke containing chamber 520 flows back into the heating chamber 510.

Referring to fig. 1 to 7, a fuel heating apparatus is disposed in the heating chamber 510, and the fuel heating apparatus includes a fuel storage tank 100, an oil pumping preheating mechanism, a burner 300, and a heat dissipating structure 400. Wherein,

referring to fig. 1 and 2, a fuel storage tank 100 is mainly used for containing fuel. Specifically, the fuel storage tank 100 is a tank structure, and a fuel inlet is formed in the tank, and a cover 101 is provided in a matching manner, so that fuel can be introduced into the fuel storage tank 100 through the fuel inlet, and the tank is closed and covered by the cover 101. A fuel outlet 102 is also opened at the lower portion of the tank body to discharge fuel.

Referring to fig. 1 and 3 together, the oil pump 200, an inlet end of the oil pump 200 is connected to the fuel storage tank 100 through a delivery pipe 211. The oil pump 200 is mainly used to pump out fuel in the fuel storage tank 100 and supply the fuel to the burner 300 for combustion. Specifically, the oil pump 200 is a pressure pump, such as a high-pressure pump. Preferably, the pump-out port of the oil pump 200 is provided with an exhaust branch 214 connected in parallel with the pump oil pipe 213, and an exhaust valve 215 is installed on the exhaust branch 214, and gas in the oil pump 200 and the pipe can be exhausted through the exhaust valve 215 when oil pumping is started. For the convenience of control, a valve 212 is provided on the oil delivery pipe 211 to control the delivery of the fuel, and for example, after the baking process is finished, the oil delivery pipe 211 can be closed by the valve 212. Valve 212 may be a manual valve 212.

Referring to fig. 1, 4 and 5, the burner 300 is mainly used for burning the fuel oil delivered by the oil pump 200 and supplying the heat generated by the burning to the baking room for baking. The burner 300 includes an oil injection tube 310, a combustion tube 320, an igniter 330, and a blower 340.

And the oil injection pipe body 310 comprises an oil injection end 311 and an oil supply end 312, and the oil supply end 312 is connected with the outlet end of the oil pumping pipeline 213. The fuel injection pipe body 310 is mainly used for injecting fuel, and the fuel is input from the fuel supply end 312 and injected from the fuel injection end 311. Specifically, the fuel injection pipe body 310 is a tubular structure made of steel, and the fuel injection end 311 converges to form a conical nozzle, but of course, in other embodiments, the fuel injection end 311 may be a nozzle structure, or a nozzle may be installed on the fuel injection pipe body 310 to form the fuel injection end 311.

The burner body 320 has a burner nozzle end 321 and a closed end 322, and the burner nozzle end 311 is disposed in the burner body 320 and is close to the burner nozzle end 321. The burner body 320 serves mainly as a combustion site for fuel. Specifically, the fuel injection pipe body 310 is disposed through the axial center of the combustion pipe body 320, wherein the fuel injection end 311 is close to the combustion nozzle end 321, and the fuel supply end 312 passes through the closed end 322 and extends outward. Preferably, the uniform injection plate 323 is installed in the combustion nozzle end 321, the uniform injection plate 323 is a circular plate matched with the combustion pipe body 320, a plurality of through holes are formed in the circular plate, the through holes can divide fuel into a plurality of strands for combustion, and a certain gap is formed between each strand, so that the fuel can be sufficiently combusted, and the combustion efficiency is further improved.

And the igniter 330 is arranged in the oil injection pipe body 310 and is close to the oil injection end 311. The igniter 330 is mainly used to ignite the fuel injected from the fuel injection end 311. The igniter 330 may be a fuel igniter 330.

And a blower 340, a blower outlet of which is disposed in the combustion tube body 320 and between the oil spraying end 311 and the closed end 322, for delivering air outside the tobacco flue-curing barn 500 into the combustion tube body 320 to supply air required for combustion of the fuel sprayed from the oil spraying end 311. Specifically, the air inlet 550 of the blower 340 is disposed outside the tobacco flue-curing house 500, and the blower outlet is disposed through the wall surface of the combustion pipe 320. The blower 340 may be a centrifugal blower 340.

Referring to fig. 1 and 6, the pressure of the fuel is increased after the fuel passes through the oil pump 200, and the fuel is almost atomized from the injection end 311 of the fuel injection pipe, so that the fuel can be more fully combusted.

The heat dissipation structure 400 is disposed in the heating chamber 510, the heat dissipation structure 400 includes a heat dissipation cavity 410, the combustion nozzle 321 of the combustion tube 320 extends into the heat dissipation cavity 410 to spray the flame generated by the burner 300 into the heat dissipation cavity 410, and the heat dissipation cavity 410 dissipates the heat into the heating chamber 510 to provide the heat required by the tobacco flue-curing barn 500 for baking the tobacco leaves. The heat dissipation structure 400 is mainly used to dissipate heat generated by combustion of the burner 300 into the heating chamber 510. Specifically, the heat dissipation cavity 410 is a cavity structure similar to a cone with a small top and a large bottom, a mounting hole 411 is formed in the lower portion of the heat dissipation cavity, and the nozzle end of the combustion pipe body 320 extends into the heat dissipation cavity 410 through the mounting hole 411. The heat dissipation cavity 410 is made of a heat conductive metal material, such as steel or iron.

An exhaust pipe 412 is further opened at the upper portion of the heat dissipation chamber 410, and the exhaust pipe 412 is mainly used for exhausting the gas in the combustion chamber. Specifically, one end of the exhaust pipe 412 extends into the heat dissipation cavity 410, and the other end extends outward out of the heating chamber 510, so as to exhaust the exhaust gas generated by combustion out of the heating chamber 510.

Preferably, the heat dissipation structure 400 further comprises a plurality of heat pipes 430, and the plurality of heat pipes 430 are disposed on the heat dissipation chamber 410. Specifically, a heat conducting bracket 420 is connected to the upper end surface of the heat dissipating chamber 410, and a plurality of heat conducting pipes 430 are horizontally arranged on the heat conducting bracket at intervals. For example, the heat conductive bracket 420 is two opposite heat conductive plates welded to the upper end surface of the heat dissipation chamber 410, and two ends of the plurality of heat conductive pipes 430 are respectively welded to the two heat conductive plates. The heat conductive bracket 420 and the heat conductive pipe 430 are made of a heat conductive metal material, such as steel or iron.

When the burner 300 is burning, the heat dissipation chamber 410 can transfer heat to the heat conductive bracket 420, and then the heat conductive bracket 420 transfers the heat to the heat conductive pipe 430, so that the heat conductive pipe 430 can dissipate the heat into the heating chamber 510. The structure can increase the heat dissipation area, prolong the heat dissipation time and improve the utilization rate of heat.

Preferably, a fan 440 is installed above the plurality of heat pipes 430, and the fan 440 mainly serves to transport the air flow upwards or downwards, so as to transport the heat generated by the combustion furnace and dissipated by the plurality of heat pipes 430 upwards or downwards, thereby forming the descending tobacco flue-curing house 500 or the ascending tobacco flue-curing house 500. The fan 440 may be an axial fan that is horizontally mounted above the plurality of heat conductive pipes 430 by a mounting bracket.

Generally, the existing tobacco curing barn 500 is further provided with a curing control assembly, and a temperature and humidity detection device is further installed in the tobacco loading chamber 520 and is electrically connected with the curing control assembly. The temperature and humidity detecting device is mainly used for sensing the baking temperature in the tobacco containing chamber 520 and is used as a basis for adjusting the burner 300. The temperature and humidity detection device can be a temperature and humidity sensor. The baking control component may be a controller, such as a PLC single chip, which is a common control device on the tobacco flue-curing house 500.

Referring to fig. 7, a moisture exhausting window is disposed in the smoke containing chamber 520, a moisture exhausting fan is mounted on the moisture exhausting window, and a control end of the moisture exhausting fan is electrically connected to the baking control assembly. The moisture exhaust fan is mainly used for dehumidifying, and when the temperature and humidity detection device detects that the humidity in the tobacco containing chamber 520 exceeds a set value, the baking control assembly controls the moisture exhaust fan to operate to perform moisture exhaust treatment.

For convenience, intelligent control of the burner 300 is achieved and is associated with the regulation of the tobacco flue-curing house 500. An electric valve 313 is arranged on the injection tube body 310, and the electric valve 313 is mainly used for closing and opening the injection tube body 310, namely determining whether to inject oil, and can quickly extinguish combustion when needed due to the position close to the injection end 311.

The bake control assembly is electrically connected to the control terminal of the electrically operated valve 313. The baking control assembly is electrically connected with the control end of the igniter 330; the baking control assembly is electrically connected with the control end of the blower 340; when the temperature and humidity value detected by the temperature and humidity detecting device exceeds the set value, the baking control assembly controls the opening and closing of the electric valve 313, the ignition of the igniter 330 and the opening and closing of the blower 340. The advantage of this kind of structure lies in, feels the humiture that the temperature and humidity measurement device detected and surpasss the setting value at the control assembly that toasts, by the switch of the control assembly control combustor 300 that toasts again, so with the humiture in the tobacco flue-curing house 500 as the condition of control combustor 300, can avoid the tobacco leaf that combustor 300 maloperation caused to toast the damage.

When the baking is started, baking process parameters are input to a baking control component of the tobacco baking room 500, then the valve 212 at the oil outlet of the fuel oil storage tank 100 is opened, the oil pump 200 is started, the fuel oil is pumped from the fuel oil storage tank 100 to the oil injection pipe by the oil pump 200 and is sprayed out from the oil injection end 311, the fuel oil is ignited by the igniter 330, the air blower 340 supplies oxygen required by the combustion of the fuel oil, the flame is sprayed into the heat dissipation cavity 410, the heat is dissipated into the heating chamber 510 through the heat dissipation cavity 410 and the heat conduction pipes 430, finally, the hot air is conveyed into the tobacco loading chamber 520 from the air inlet 550 by the air blower to bake the tobacco leaves, and the baked air flow returns to the heating chamber 510 through the air return. During the baking process, the baking control assembly can regulate and control the burner 300 and the moisture exhaust fan according to the baking process.

The oil pump 200 in this embodiment may provide heat to the burner 300 of one or more tobacco flue-curing houses 500. When supplying heat to a plurality of tobacco curing barn 500, the oil pumping pipe 213 of the oil pump 200 is connected to the oil supply end 312 of a plurality of burners 300 through the multi-way pipe joint 216 and the oil delivery pipe 211, and the plurality of burners 300 are installed in the heating chamber 510 of different tobacco curing barn 500. Specifically, the burner 300 is mounted in a combustion chamber within the heating chamber 510. Thus, the burners 300 of different tobacco curing houses 500 can be supplied with oil by one oil pump 200. The multi-way pipe joint 216 may be a tee pipe joint or a four-way pipe joint.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (6)

1. The utility model provides a fuel direct combustion formula tobacco flue-curing house, includes tobacco flue-curing house (500), tobacco flue-curing house (500) are including heating chamber (510) and dress smoke chamber (520) heating chamber (510) with be equipped with air intake (550) and return air inlet (540) on partition wall (530) of dress smoke chamber (520), the steam that heating chamber (510) produced is followed air intake (550) enter into in dress smoke chamber (520), the warp after toasting the tobacco leaf return air inlet (540) flow back to heating chamber (510) inner loop, its characterized in that be provided with fuel heating device in heating chamber (510), fuel heating device includes:

a fuel storage tank (100) for containing fuel;

the inlet end of the oil pump (200) is connected with the fuel storage tank (100) through an oil pipeline (211);

burner (300), comprising:

the oil injection pipe body (310) comprises an oil injection end (311) and an oil supply end (312), and a pump-out port of the oil pump (200) is connected with the oil supply end (312) through an oil pumping pipeline (213);

a combustion nozzle body (320) having a combustion nozzle end (321) and a closed end (322), the fuel injector tube being disposed within the combustion nozzle body (320) and proximate the combustion nozzle end (321);

the igniter (330) is arranged in the oil injection pipe body (310) and is close to the oil injection end (311) and is used for igniting fuel oil;

a blower (340), a blower outlet of the blower (340) is arranged in the combustion tube body (320) and is positioned between the oil injection end (311) and the closed end (322) so as to convey air outside the tobacco flue-curing house (500) to air required by combustion of oil injected from the oil injection end (311);

heat radiation structure (400), set up in heating chamber (510), heat radiation structure (400) are including heat dissipation cavity (410), burning body (320) burning nozzle end (321) extend into in heat dissipation cavity (410), with the flame spraying that combustor (300) produced to in heat dissipation cavity (410), by heat dissipation cavity (410) with the heat give off in heating chamber (510), in order to provide the required heat of tobacco flue-curing house (500) toast the tobacco leaf.

2. The direct fuel-fired tobacco flue-curing house according to claim 1, characterized in that: the tobacco flue-curing house (500) is also provided with a control component in a matching way;

a temperature and humidity detection device is arranged in the cigarette containing chamber (520), and the temperature and humidity detection device is electrically connected with the control assembly;

a moisture exhaust window is arranged in the smoke containing chamber (520), a moisture exhaust fan is arranged on the moisture exhaust window, and the control end of the moisture exhaust fan is electrically connected with the control assembly.

3. The direct fuel-fired tobacco flue-curing house according to claim 2, characterized in that: an electric valve (313) is arranged on the oil injection pipe body (310);

the control assembly is electrically connected with the control end of the electric valve (313);

the control assembly is electrically connected with the control end of the igniter (330);

the control assembly is electrically connected with a control end of the blower (340);

when the temperature and humidity value detected by the temperature and humidity detection device exceeds a set value, the control component controls the opening and closing of the electric valve (313), the ignition of the igniter (330) and the opening and closing of the blower (340).

4. The direct fuel-fired tobacco flue-curing house according to claim 1, characterized in that: and an exhaust branch pipe (214) connected with the oil pumping pipeline (213) in parallel is arranged at the pump-out port of the oil pump (200), and an exhaust valve (215) is arranged on the exhaust branch pipe (214).

5. The direct fuel-fired tobacco flue-curing house according to claim 1, characterized in that: the heat dissipation structure (400) further comprises a plurality of heat pipes (430), the heat pipes (430) are arranged on the heat dissipation cavity (410), the heat dissipation cavity (410) transfers heat to the heat pipes (430), and the heat pipes (430) dissipate the heat to the heating chamber (510).

6. The direct fuel-fired tobacco flue-curing house according to any one of claims 1 to 5, characterized in that: the oil pumping pipeline (213) is connected with the oil supply ends (312) of the plurality of burners (300) through a multi-channel pipeline joint (216) and an oil conveying pipeline (211), and the plurality of burners (300) are arranged in the heating chambers (510) of different tobacco curing rooms (500).

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