CN210929592U - Fuel preheating combustion type tobacco flue-curing house - Google Patents

Abstract

The utility model discloses a burning type tobacco flue-curing house is preheated to fuel, including the heating chamber, be provided with fuel heating device in the heating chamber, fuel heating device includes: a fuel storage tank; the oil pumping preheating mechanism comprises an oil pump, a buffer oil tank, a preheating pipeline and a heating device, wherein the oil pump pumps fuel oil into the buffer oil tank, and the fuel oil flows out of the preheating pipeline and is heated by the heating device; the burner comprises an oil injection pipe body, a combustion pipe body, an igniter and a blast device, wherein the oil injection pipe body receives fuel oil conveyed from the preheating pipeline and sprays the fuel oil out of the preheating pipeline 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 fuel combustion heat supply 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.

Description

Fuel preheating combustion type tobacco flue-curing house

Technical Field

The utility model relates to a fuel preheats burning formula tobacco flue-curing house belongs to the tobacco flue-curing house 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 preheating 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 preheats burning 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 to 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;

oil pumping preheats mechanism includes:

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

the oil pump pumps the fuel oil in the fuel oil storage tank into the buffer oil tank;

the inlet end of the preheating pipeline is connected with the buffer oil tank;

the heating device is arranged close to the preheating pipeline and used for heating the fuel oil in the preheating pipeline;

a burner, comprising:

the oil injection pipe body comprises an oil injection end and an oil supply end, and the oil supply end is connected with the outlet end of the preheating pipeline;

the fuel injection end 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 and close to the oil injection end and is used for igniting fuel oil;

the air outlet of the air blowing device 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 baking control component in a matching way;

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

the tobacco loading chamber is internally provided with a moisture exhausting window, the moisture exhausting window is provided with a moisture exhausting fan, and the control end of the moisture exhausting fan is electrically connected with the baking control assembly.

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

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

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

the baking control assembly is electrically connected with the control end of the air blowing device;

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

Further, the oil pumping preheating mechanism further comprises:

the liquid level detection sensor is arranged in the buffer oil tank;

the second electric valve is arranged on the oil pumping pipeline;

the oil pumping preheating control assembly is respectively and electrically connected with the liquid level detection sensor, the oil pump and the control end of the second electric valve, the liquid level detection sensor transmits the detected liquid level value of the buffer oil tank to the oil pumping preheating control assembly, and the oil pump and the second electric valve act according to the control command of the oil pumping preheating control assembly.

Further, the heating device comprises an electromagnetic heating controller and an electromagnetic heating coil, the electromagnetic heating controller is electrically connected with the electromagnetic heating coil, and the electromagnetic heating coil is wound on the preheating pipeline;

the power end of the electromagnetic heating controller is electrically connected with the oil pumping preheating control assembly, and the electromagnetic heating controller controls the electromagnetic heating ring to heat the preheating pipeline according to a command from the oil preheating baking control assembly.

Furthermore, the oil pumping pipeline is connected with the lower part of the buffer oil tank, and the preheating pipeline is connected with the upper part of the buffer oil tank.

Furthermore, a one-way valve is arranged on the preheating pipeline at a position close to the buffer oil tank so as to prevent the fuel oil from flowing back into the buffer oil tank from the preheating pipeline.

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

The utility model has the advantages that: during baking, fuel oil is pumped from a fuel oil storage tank to a buffer oil tank by an oil pump, enters a preheating pipeline and is heated by a heating device, then is supplied to a fuel oil injection pipeline and is sprayed out from a fuel oil injection end, an igniter ignites the fuel oil, a blowing device supplies oxygen required by combustion of the fuel oil, flame generated by combustion of the fuel oil is sprayed into a heat dissipation cavity, heat is dissipated into a heating chamber through the heat dissipation cavity and a plurality of heat conduction pipes, finally hot gas is conveyed into a tobacco containing chamber from an air inlet to bake tobacco leaves, and air flow after baking returns to the heating chamber through an air return opening to circulate. Compared with the prior solid fuel, the utility model discloses a fuel burning heat supply both can improve combustion efficiency, reduces environmental pollution, can reduce again and toast the cost, simultaneously can be quick according to technology needs adjustment heating temperature. Compare with current electric energy heat supply, the utility model discloses a fuel burning heat supply, not only the transformation cost is lower, only need on current tobacco flue-curing house basis transform can, can not receive the influence of power consumption environment moreover, for example the baking that has a power failure to cause is interrupted and the tobacco leaf is reported and is decreased.

In addition, after the fuel oil passes through the oil pumping preheating mechanism, the fuel oil has three characteristics: firstly, the temperature of the fuel oil is increased, and after the fuel oil is sprayed out by the oil injection pipe body, the fuel oil can be instantly and quickly ignited, so that the combustion efficiency can be improved; the pressure of the fuel oil is increased, and the fuel oil is almost sprayed out in a mist form from the oil spraying end of the oil spraying pipe, so that the combustion can be more sufficient; and thirdly, the fuel oil is not directly injected by the pressure provided by the oil pump, but is stored and buffered by the buffer oil tank, so that the pressure fluctuation of the fuel oil can be reduced, the fuel oil can gradually and slowly overflow into the preheating pipeline for continuous heating, and the fuel oil cut-off is avoided.

Drawings

FIG. 1 is a schematic structural view of a fuel preheating combustion type 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 pumping preheating mechanism of FIG. 1;

FIG. 4 is an enlarged schematic view of the heating apparatus of FIG. 3;

FIG. 5 is an enlarged schematic view of the burner of FIG. 1;

FIG. 6 is a schematic view of the homogenizing plate of FIG. 5;

FIG. 7 is a schematic view of the heat dissipation structure and the tobacco flue-curing house shown in FIG. 1;

FIG. 8 is a control structure diagram of the oil pumping preheating mechanism;

FIG. 9 is a control block diagram of the burner;

description of reference numerals:

100 fuel oil storage tanks, 200 oil pumping preheating mechanisms, 300 burners, 400 heat dissipation structures and 500 tobacco curing rooms;

101 a cover, 102 a fuel outlet;

210 oil pump, 211 oil pipeline, 212 valve, 213 oil pumping pipeline, 214 exhaust branch pipe, 215 exhaust valve, 216 second electric valve, 220 buffer oil tank, 221 liquid level detection sensor, 230 preheating pipeline, 231 one-way valve, 232 pressure relief valve, 233 temperature detection sensor, 234 multi-way pipeline joint, 240 heating device, 241 electromagnetic heating ring;

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

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 above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

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 and 7 are schematic views of an overall structure of a fuel preheating combustion type 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 an ascending type flue-cured tobacco house, 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 a descending type flue-cured tobacco house. 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 9, 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 200, a burner 300, and a heat dissipating structure 400. Wherein the content of the first and second substances,

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, 3 and 4, the oil pumping preheating mechanism 200 includes an oil pump 210, a buffer oil tank 220, a preheating pipe 230, a heating device 240, a liquid level detecting sensor 221, a temperature detecting sensor 233 and an oil pumping preheating control assembly. The oil pumping preheating mechanism 200 is mainly used for pumping out the fuel in the fuel storage tank 100, preheating the fuel and delivering the fuel to the burner 300 for combustion.

An inlet end of the oil pump 210 is connected to the fuel storage tank 100 through an oil delivery pipe 211. The oil pump 210 is mainly used to pump out fuel in the fuel storage tank 100. Specifically, the oil pump 210 is a pressure pump, such as a high pressure pump. Preferably, the pump-out port of the oil pump 210 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 210 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.

A buffer fuel tank 220, a pump-out port of the fuel pump 210 being connected to the buffer fuel tank 220 through a pump fuel line 213, the fuel pump 210 pumping the fuel in the fuel storage tank 100 into the buffer fuel tank 220. After the fuel pump 210 is sent to the buffer fuel tank 220 by the fuel pump 210, the buffer fuel tank 220 can temporarily store the fuel before preheating, and the structure has the advantages that the pressure fluctuation of the fuel pump 210 can be relieved, so that the supply pressure of the fuel is more balanced, and the combustion is more stable and controllable. Preferably, a pressure detection gauge is provided on the buffer tank 220 for observing the pressure inside the buffer tank 220 from the outside at any time. Meanwhile, in order to prevent the fuel in the buffer tank 220 from flowing back to the pump oil pipeline 213 and the oil pump 210 when the oil pump 210 does not work, a second electric valve 216 is installed on the pump oil pipeline 213 and used for controlling the opening and closing of the pump oil pipeline 213.

A preheating pipe 230, and the inlet end of the preheating pipe 230 is connected to the buffer oil tank 220. The preheating line 230 serves primarily to supply preheated fuel flowing from the buffer tank 220 to the burner 300 for use. Specifically, the preheating pipe 230 may be a steel pipe. Preferably, a check valve 231 is disposed on the preheating pipe 230 at a position close to the buffer tank 220 to prevent the preheated fuel from flowing back from the preheating pipe 230 to the buffer tank 220. In addition, a relief valve 232 is installed in the preheating pipe 230, a safe relief value is set, and when the pressure in the preheating pipe 230 exceeds the relief value, the relief valve 232 automatically relieves the pressure.

Preferably, the pumping oil pipe 213 is connected to a lower portion of the buffer oil tank 220, and the preheating pipe 230 is connected to an upper portion of the buffer oil tank 220, so that the fuel is introduced from the lower portion of the buffer oil tank 220 and discharged from the upper portion of the buffer oil tank 220, and this structure allows the fuel to gradually and slowly overflow into the preheating pipe 230 to be continuously heated, thereby preventing fuel cut-off.

And a heating device 240 disposed adjacent to the preheating pipe 230 for heating the fuel in the preheating pipe 230. Specifically, the heating device 240 includes an electromagnetic heating controller and an electromagnetic heating coil 241, the electromagnetic heating controller is electrically connected to the electromagnetic heating coil 241, the electromagnetic heating coil 241 is wound on the preheating pipe 230, and the fuel in the preheating pipe 230 is heated by the electromagnetic heating coil 241. For example, the fuel may be preheated to 150 ℃.

Preferably, the part of the preheating pipe 230 wound with the electromagnetic heating coil 241 is vertically arranged and located above the interface between the preheating pipe 230 and the buffer oil tank 220, so that the fuel oil in the buffer oil tank 220 gradually overflows and is conveyed into the preheating pipe 230, and is sufficiently and uniformly heated by the heating device 240 and then is output.

The liquid level detection sensor 221 is provided in the buffer tank 220. The liquid level detection sensor 221 is mainly used for detecting a liquid level value in the buffer oil tank 220. The liquid level detecting sensor 221 may be a float level gauge.

And a temperature detection sensor 233 provided in preheating pipe 230. Specifically, a temperature detection sensor 233 is disposed in the preheating pipe 230 where the electromagnetic heating coil 241 is wound, for sensing the temperature of the heated fuel. The temperature detection sensor 233 may be a temperature sensor.

The oil pumping preheating control component is mainly used for oil pumping and preheating control of the oil pumping preheating mechanism 200. The oil pumping preheating control component is mainly a controller, such as a PLC singlechip.

Specifically, referring to fig. 8, the temperature sensor 233 is electrically connected to the pump preheating control module, and the pump preheating control module is electrically connected to the electromagnetic heating controller. The temperature detecting sensor 233 sends the preheating temperature value of the fuel oil to the oil pumping preheating control assembly, and the electromagnetic heating controller controls the electromagnetic heating coil 241 to heat the preheating pipeline 230 according to the command from the oil preheating baking control assembly. For example, the preheating temperature of the fuel is set to 150 ℃ to 160 ℃, when the temperature detection sensor 233 detects that the temperature of the fuel is lower than 150 ℃, if the electromagnetic heating ring 241 is still heating at this time, the oil pumping preheating control assembly controls the electromagnetic heating controller to continue heating the electromagnetic heating ring 241, and if the electromagnetic heating ring 241 stops heating at this time, the oil pumping preheating control assembly controls the electromagnetic heating controller to start to heat the electromagnetic heating ring 241. When the temperature detection sensor 233 detects that the fuel temperature is between 150 ℃ and 160 ℃, the pumping and preheating control assembly controls the electromagnetic heating controller to keep the existing action unchanged. When the temperature detection sensor 233 detects that the fuel temperature is above 160 ℃, the oil pumping preheating control assembly controls the electromagnetic heating controller to close and the electromagnetic heating ring 241 stops heating.

Referring to fig. 8, the liquid level detecting sensor 221 is electrically connected to the oil pumping preheating control module, and the oil pumping preheating control module is electrically connected to the oil pump 210 and the control end of the second electrically operated valve 216. The level value of the buffer tank 220 detected by the level detecting sensor 221 is transmitted to the pump pre-heating control unit, and the oil pump 210 and the second electrically operated valve 216 are operated according to the control command of the pump pre-heating control unit. For example, a range of the level value of the fuel oil pumping is set, for example, 5L to 8L, when the level detection sensor 221 detects that the level value is lower than 5L, if the second electrically operated valve 216 is in the open state and the oil pump 210 is in the oil pumping state, the oil pumping preheating control assembly controls the oil pump 210 and the second electrically operated valve 216 to remain in the existing state, and if the second electrically operated valve 216 is in the closed state and the oil pump 210 is also in the stop state, the oil pumping preheating control assembly controls the second electrically operated valve 216 to open and simultaneously starts the oil pump 210 to pump oil. When the level detecting sensor 221 detects that the level value is 5L-8L, the oil pumping pre-heating control assembly controls the second electric valve 216 and the oil pump 210 to keep the existing state. When the liquid level detecting sensor 221 detects that the liquid level value is above 5L-8L, the oil pumping pre-heating control assembly controls the second electric valve 216 to close, and the oil pump 210 stops pumping oil.

Referring to fig. 1, 5 and 6, the burner 300 is mainly used for burning preheated fuel and supplying heat generated by the burning to the baking room for baking. The burner 300 includes an oil injecting tube 310, a combustion tube 320, an igniter 330, and a blowing device 340.

And the oil injection pipe body 310, wherein 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 preheating pipeline 230. The fuel injection pipe body 310 is mainly used for injecting the preheated fuel, and the fuel is input from the fuel supply end 312 and is 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 the air outlet of the air blowing device 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 into the combustion tube body 320 and supply air required by combustion of fuel oil injected from the oil injection end 311. Specifically, the air inlet 550 of the blower 340 is disposed outside the tobacco flue-curing house, and the air outlet thereof is disposed through the wall surface of the combustion pipe 320. The air blowing device 340 may be a centrifugal blower.

After the fuel oil passes through the oil pumping preheating mechanism 200, the fuel oil has two characteristics: firstly, the temperature of the fuel oil is increased, and after the fuel oil is injected by the fuel injection pipe body 310, the fuel oil can be instantly and quickly ignited, so that the combustion efficiency can be improved; secondly, the pressure of the fuel is increased, and the fuel is sprayed out from the fuel spraying end 311 of the fuel spraying pipe almost in a mist shape, so that the combustion can be more sufficient.

Referring to fig. 1 and 7, the heat dissipating structure 400 is disposed in the heating chamber 510, the heat dissipating structure 400 includes a heat dissipating cavity 410, the combustion nozzle 321 of the combustion tube 320 extends into the heat dissipating cavity 410 to spray the flame generated by the burner 300 into the heat dissipating cavity 410, and the heat dissipating cavity 410 dissipates the heat into the heating chamber 510 to provide the heat required by the tobacco flue-curing barn to cure 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 upward or downward, so as to transport the heat generated by the combustion furnace and dissipated by the plurality of heat pipes 430 upward or downward, thereby forming a descending tobacco flue-curing house or an ascending tobacco flue-curing house. 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 can be a controller, such as a PLC single chip microcomputer, which is a common control device on a tobacco flue-curing house.

A moisture exhausting window is arranged in the tobacco loading chamber 520, a moisture exhausting fan is arranged on the moisture exhausting window, and the control end of the moisture exhausting fan is electrically connected with 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. A first electric valve 313 is arranged on the injection tube body 310, and the first 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.

Referring also to fig. 9, the bake control module is electrically connected to the control terminal of the first 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 air blowing device 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 first electric valve 313, the ignition of the igniter 330 and the opening and closing of the blowing device 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 a valve 212 at an oil outlet of the fuel oil storage tank 100 is opened, oil pumping liquid level parameters on the oil pumping preheating mechanism 200 and the heating temperature of the fuel oil are set, the fuel oil is pumped into a buffer oil tank 220 from the fuel oil storage tank 100 by an oil pump 210, enters a preheating pipeline 230 and is heated by a heating device 240, then is supplied to a fuel injection pipeline and is sprayed out from a fuel injection end 311, an igniter 330 ignites the fuel oil, a blower device 340 supplies oxygen required by combustion of the fuel oil, flames are sprayed into a heat dissipation cavity 410, heat is dissipated into a heating chamber 510 through the heat dissipation cavity 410 and a plurality of heat conduction pipes 430, finally hot air is conveyed into a tobacco loading chamber 520 from an air inlet 550 by a fan 440 to bake tobacco leaves, and air flow after baking flows back into the heating chamber 510 through an air return opening 540. 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. Meanwhile, the oil pumping preheating control assembly can supplement the fuel oil in the buffer oil tank 220 and regulate and control the heating temperature of the heating device 240.

In this embodiment, the oil pumping preheating mechanism 200 can provide heat for one or more tobacco flue-curing houses 500. When supplying heat to a plurality of tobacco curing barn 500, the preheating pipe 230 is connected to the oil supply end 312 of a plurality of burners 300 through the multi-pipe joint 234 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. In this way, the burners 300 of different tobacco curing houses 500 can be supplied with oil through one preheating pipe 230. The multi-way pipe joint 234 may be a tee pipe joint or a four-way pipe joint.

When the oil pumping preheating mechanism 200 supplies heat to a tobacco flue-curing house 500, the oil pumping preheating control component and the baking control component may be the same control component or different control components. When the oil pumping preheating mechanism 200 supplies heat to a plurality of tobacco curing barn 500, the oil pumping preheating control module and the baking control module are different control modules, wherein the oil pumping preheating control module is mainly used for controlling the oil pumping preheating mechanism 200, and each baking control module is mainly used for controlling the baking of the corresponding tobacco curing barn 500.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a fuel preheating 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), pass through 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;

oil pumping preheating mechanism (200) comprising:

the inlet end of the oil pump (210) is connected with the fuel storage tank (100) through an oil pipeline (211);

a buffer oil tank (220), wherein a pumping-out port of the oil pump (210) is connected with the buffer oil tank (220) through an oil pumping pipeline (213), and the oil pump (210) pumps the fuel in the fuel storage tank (100) into the buffer oil tank (220);

a preheating pipeline (230), wherein the inlet end of the preheating pipeline (230) is connected with the buffer oil tank (220);

a heating device (240) disposed adjacent to the preheating pipe (230) for heating the fuel in the preheating pipe (230);

burner (300), comprising:

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 preheating pipeline (230);

a combustion tube body (320) having a combustion nozzle end (321) and a closed end (322), said oil nozzle end (311) being disposed within said combustion tube body (320) and proximate to said combustion nozzle end (321);

an igniter (330) disposed within the injection tube body (310) and proximate the injection end (311) for igniting fuel;

the air outlet of the air blowing device (340) is arranged in the combustion pipe 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 fuel oil preheating combustion type tobacco flue-curing house according to claim 1, characterized in that: the tobacco curing room (500) is also provided with a curing control component in a matching way;

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

be equipped with the hydrofuge window in dress smoke chamber (520) the hydrofuge fan (440) is equipped with on the hydrofuge window, the control end of hydrofuge fan (440) with toast control assembly electrical connection.

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

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

the toasting control assembly is electrically connected to the control terminal of the lighter (330);

the baking control assembly is electrically connected with a control end of the air blowing device (340);

when the temperature and humidity value detected by the temperature and humidity detection device exceeds a set value, the baking control assembly controls the opening and closing of the first electric valve (313), the ignition of the igniter (330) and the switch of the air blowing device (340).

4. The fuel oil preheating combustion type tobacco flue-curing house according to claim 1, characterized in that: the oil pumping preheating mechanism (200) further comprises:

a liquid level detection sensor (221) disposed in the buffer oil tank (220);

a second electrically operated valve (216) disposed on the oil pumping pipe (213);

the oil pumping preheating control assembly is respectively and electrically connected with the liquid level detection sensor (221), the oil pump (210) and the control end of the second electric valve (216), the liquid level detection sensor (221) transmits the detected liquid level value of the buffer oil tank (220) to the oil pumping preheating control assembly, and the oil pump (210) and the second electric valve (216) act according to the control command of the oil pumping preheating control assembly.

5. The fuel oil preheating combustion type tobacco flue-curing house according to claim 4, characterized in that: the heating device (240) comprises an electromagnetic heating controller and an electromagnetic heating coil (241), the electromagnetic heating controller is electrically connected with the electromagnetic heating coil (241), and the electromagnetic heating coil (241) is wound on the preheating pipeline (230);

the power end of the electromagnetic heating controller is electrically connected with the oil pumping preheating control assembly, and the electromagnetic heating controller controls the electromagnetic heating ring (241) to heat the preheating pipeline (230) according to a command from the oil preheating baking control assembly.

6. The fuel oil preheating combustion type tobacco flue-curing house according to claim 1, characterized in that: the oil pumping pipeline (213) is connected with the lower part of the buffer oil tank (220), and the preheating pipeline (230) is connected with the upper part of the buffer oil tank (220).

7. The fuel oil preheating combustion type tobacco flue-curing house according to claim 1, characterized in that: a one-way valve (231) is arranged on the preheating pipeline (230) at a position close to the buffer oil tank (220) so as to prevent the fuel oil from flowing back into the buffer oil tank (220) from the preheating pipeline (230).

8. The fuel oil preheating combustion type tobacco flue-curing house according to claim 1, characterized in that: and a pump-out port of the oil pump (210) is provided with an exhaust branch pipe (214) connected with the oil pumping pipeline (213) in parallel, and the exhaust branch pipe (214) is provided with an exhaust valve (215).

9. The fuel oil preheating combustion type 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).

10. The fuel oil preheating combustion type tobacco flue-curing house according to any one of claims 1 to 9, characterized in that: the preheating pipeline (230) is connected with oil supply ends (312) of the plurality of burners (300) through a multi-channel pipeline joint (234) 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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