CN110574955B - Fuel preheating combustion type tobacco flue-curing house - Google Patents
Fuel preheating combustion type tobacco flue-curing house Download PDFInfo
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- CN110574955B CN110574955B CN201910842875.9A CN201910842875A CN110574955B CN 110574955 B CN110574955 B CN 110574955B CN 201910842875 A CN201910842875 A CN 201910842875A CN 110574955 B CN110574955 B CN 110574955B
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- 239000000446 fuel Substances 0.000 title claims abstract description 101
- 241000208125 Nicotiana Species 0.000 title claims abstract description 92
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 92
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 75
- 239000003921 oil Substances 0.000 claims abstract description 170
- 238000010438 heat treatment Methods 0.000 claims abstract description 121
- 238000005086 pumping Methods 0.000 claims abstract description 70
- 238000002347 injection Methods 0.000 claims abstract description 47
- 239000007924 injection Substances 0.000 claims abstract description 47
- 239000000295 fuel oil Substances 0.000 claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 239000007921 spray Substances 0.000 claims abstract description 4
- 230000017525 heat dissipation Effects 0.000 claims description 38
- 238000001514 detection method Methods 0.000 claims description 34
- 239000007788 liquid Substances 0.000 claims description 24
- 238000007664 blowing Methods 0.000 claims description 13
- 239000000779 smoke Substances 0.000 claims description 12
- 238000005192 partition Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 230000005855 radiation Effects 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000004449 solid propellant Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Manufacture Of Tobacco Products (AREA)
Abstract
The invention discloses a fuel preheating combustion type tobacco flue-curing house, which comprises a heating chamber, wherein a fuel heating device is arranged in the heating chamber, and the fuel heating device comprises: 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 flows out of the preheating pipeline to be 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 the fuel oil conveyed from the preheating pipeline and sprays the fuel oil for combustion to generate flame; the heat radiation structure comprises a heat radiation cavity, the combustion nozzle end of the combustion pipe body extends into the heat radiation cavity, and the heat generated by the burner is radiated into the heating chamber by the heat radiation cavity so as to provide heat required by flue-cured tobacco leaf baking in the flue-cured tobacco house. The fuel oil combustion heat supply of the invention is realized by only modifying the existing tobacco flue-curing house, the modification cost is low, and the invention is not influenced by the electricity consumption environment.
Description
Technical Field
The invention relates to a fuel oil preheating combustion type tobacco flue-curing house, and belongs to the field of tobacco flue-curing houses.
Background
Tobacco curing houses are mainly used for curing tobacco leaves. The tobacco flue-curing house 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 so as to finish baking of the tobacco leaves. At present, a tobacco leaf baking process of hot air circulation is implemented by adopting solid fuel or an electric-thermal converter using electric energy and a motor-driven electric power fan in a heating chamber. The solid fuel is mainly coal, and the use mode is that a combustion furnace is arranged in a heating chamber, and the coal is combusted in the combustion furnace to generate heat for supplying 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 following problems are caused when using electric energy: the early investment cost of the power distribution equipment is extremely high, the power consumption of the electric heating conversion device is large, strict requirements are met on site selection limitation of a tobacco flue-curing house and erection of power supply network wires, and power failure (common phenomenon of rural power grids) occurring in the electricity utilization peak period can also cause baking interruption and tobacco leaf damage reporting.
Disclosure of Invention
The invention aims to solve the technical problems that: the fuel preheating combustion type tobacco flue-curing house is provided to solve the problems of high energy consumption and high cost existing in the conventional tobacco flue-curing house for heat supply.
The technical scheme of the invention is as follows: the utility model provides a fuel preheats combustion formula tobacco flue-curing house, includes the tobacco flue-curing house, the tobacco flue-curing house includes heating chamber and dress tobacco chamber the heating chamber with be equipped with air intake and return air inlet on dress tobacco chamber's the partition wall, the steam that the heating chamber produced is followed the air intake enters into in the dress tobacco chamber, after toasting the tobacco leaf warp the return air inlet flows back to in the heating chamber circulation be provided with fuel heating device in the heating chamber, fuel heating device includes:
the fuel oil storage tank is used for containing fuel oil;
the oil pumping preheats mechanism includes:
the inlet end of the oil pump is connected with the fuel oil storage tank through an oil pipeline;
the pumping port of the oil pump is connected with the buffer oil tank through an oil pumping pipeline, and the oil pump pumps the fuel in the fuel 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 is used for heating 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 combustion pipe body is provided with a combustion nozzle end and a closed end, and the oil 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 the fuel;
the air outlet of the air blowing device is arranged in the combustion tube 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 dissipation structure is arranged in the heating chamber and comprises a heat dissipation cavity, the combustion nozzle end of the combustion pipe body extends into the heat dissipation cavity, so that flame generated by the burner is sprayed into the heat dissipation cavity, and the heat dissipation cavity dissipates heat into the heating chamber to provide heat required by flue-cured tobacco leaves in the flue-cured tobacco house.
Further, the tobacco flue-curing house is also provided with a baking control assembly in a matched mode;
a temperature and humidity detection device is arranged in the smoke loading chamber and is electrically connected with the baking control assembly;
the tobacco accommodating chamber is internally provided with a moisture removing window, the moisture removing window is provided with a moisture removing fan, and the control end of the moisture removing 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 first electric valve to be opened and closed, the igniter to ignite, and the blower to be opened and closed.
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 electrically connected with the liquid level detection sensor, the oil pump and the control end of the second electric valve respectively, the liquid level detection sensor transmits the liquid level value of the buffer oil tank detected by the oil pumping preheating control assembly 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 ring, wherein the electromagnetic heating controller is electrically connected with the electromagnetic heating ring, and the electromagnetic heating ring 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.
Further, 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.
Further, a one-way valve is arranged on the preheating pipeline at a position close to the buffer oil tank so as to prevent fuel oil from flowing back into the buffer oil tank from the preheating pipeline.
Further, a pumping outlet of the oil pump is provided with an exhaust branch pipe connected with the oil pumping pipeline in parallel, and an exhaust valve is arranged on the exhaust branch pipe.
Further, the heat dissipation structure further comprises a plurality of heat conduction pipes, the heat conduction pipes are arranged on the heat dissipation cavity, the heat dissipation cavity transfers heat to the heat conduction pipes, and the heat conduction pipes radiate heat into the heating chamber.
Further, the preheating pipeline is connected with the oil supply ends of a plurality of burners through a multi-way pipeline joint and an oil pipeline, and the burners are arranged in the heating chambers of different tobacco flue-curing houses.
The beneficial effects of the invention are as follows: during baking, fuel is pumped into the buffer oil tank from the fuel storage tank by the oil pump, enters the preheating pipeline and is heated by the heating device, then is supplied to the oil spraying pipeline and sprayed out from the oil spraying end, is ignited by the igniter, oxygen required by combustion is supplied to the air blowing device, flame generated by fuel combustion is sprayed into the heat dissipation cavity, heat is emitted into the heating chamber through the heat dissipation cavity and the plurality of 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 flows back into the heating chamber through the air return opening to circulate. Compared with the existing solid fuel, the invention adopts the fuel oil for burning and supplying heat, thereby not only improving the burning efficiency and reducing the environmental pollution, but also reducing the baking cost, and simultaneously being capable of quickly adjusting the heating temperature according to the process requirement. Compared with the existing electric energy heating, the invention adopts the fuel oil combustion to supply heat, has lower transformation cost, can be transformed on the basis of the existing tobacco flue-curing house, and can not be influenced by the electricity environment, such as baking interruption and tobacco leaf damage reporting caused by power failure.
In addition, after the fuel passes through the oil pumping preheating mechanism, the three characteristics are that: firstly, the temperature of the fuel is improved, and after the fuel is sprayed out of the fuel spraying pipe body, the fuel can be instantaneously and rapidly ignited, so that the combustion efficiency can be improved; secondly, the pressure of the fuel is increased, and the fuel 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; thirdly, the fuel is not directly provided with pressure injection by the oil pump, but is stored and buffered by the buffer oil tank, so that the pressure fluctuation of the fuel can be reduced, the fuel can gradually slowly overflow into the preheating pipeline to be continuously heated, and the fuel is prevented from being broken.
Drawings
FIG. 1 is a schematic diagram of a fuel preheating combustion type tobacco flue-curing house according to an embodiment;
FIG. 2 is an enlarged schematic view of the fuel tank of FIG. 1;
FIG. 3 is an enlarged schematic view of the pumping preheating mechanism of FIG. 1;
FIG. 4 is an enlarged schematic view of the heating device of FIG. 3;
FIG. 5 is an enlarged schematic view of the combustor of FIG. 1;
FIG. 6 is a schematic view of the uniformity plate of FIG. 5;
FIG. 7 is a schematic view of the heat dissipating structure of FIG. 1 and a flue-cured tobacco house;
FIG. 8 is a control block diagram of the pumping preheating mechanism;
FIG. 9 is a control block diagram of a combustor;
reference numerals illustrate:
100 fuel oil storage tanks, 200 oil pumping preheating mechanisms, 300 burners, 400 heat dissipation structures and 500 tobacco flue-curing houses;
101 port cover, 102 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 release valve, 233 temperature detection sensor, 234 multi-way pipeline joint, 240 heating device, 241 electromagnetic heating ring;
310 oil injection pipe bodies, 311 oil injection ends, 312 oil supply ends, 313 first electric valves, 320 combustion pipe bodies, 321 combustion nozzle ends, 322 closed ends, 323 uniform injection plates, 324 through holes, 330 igniters and 340 air blowing devices;
410 heat dissipation cavity, 411 mounting hole, 412 exhaust pipe, 420 heat conduction bracket, 430 heat conduction pipe, 440 fan;
510 heating chambers, 520 smoke chambers, 530 partition walls, 540 air return openings, 550 air inlets.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed 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 are used herein for illustrative purposes only and are not meant to be the only embodiment.
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 herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and fig. 7, a schematic diagram of an overall structure of a fuel preheating combustion tobacco flue-curing house according to an embodiment is shown. The tobacco curing barn 500 mainly comprises a heating chamber 510 and a tobacco holding chamber 520, wherein the tobacco holding chamber 520 is mainly used for holding tobacco for curing, and the heating chamber 510 mainly provides required heat for curing the tobacco holding chamber 520. The heating chamber 510 is arranged adjacent to the tobacco loading chamber 520, the heating chamber 510 and the tobacco loading chamber 520 are generally separated by a partition wall 530, an air inlet 550 and an air return opening 540 are formed in the partition wall 530, hot air generated by the heating chamber 510 enters the tobacco loading chamber 520 from the air inlet 550, and after tobacco is baked, the hot air flows back to the heating chamber 510 through the air return opening 540 for circulation, and thus the tobacco is circulated to the end of baking.
For example, an air inlet 550 is formed at the lower part of the partition wall 530, an air return opening 540 is formed at the upper part of the partition wall 530 to form a rising tobacco flue-curing house, or an air inlet 550 is formed at the upper part of the partition wall 530, and an air return opening 540 is formed at the lower part of the partition wall 530 to form a falling tobacco flue-curing house. In the curing barn field, the air inlet 550 and the air return 540 are all of the same opening structure, and the differences are mainly named as 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 together, a fuel heating device is provided in the heating chamber 510, and the fuel heating device includes a fuel storage tank 100, a pumping preheating mechanism 200, a burner 300, and a heat radiation structure 400. Wherein,
referring to fig. 1 and 2, the fuel tank 100 is mainly used for containing fuel. Specifically, the fuel storage tank 100 has a tank structure, a fuel inlet is formed in the tank, and a cover 101 is provided to cover the tank, 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 provided in the lower part of the tank to drain the fuel.
Referring to fig. 1, 3 and 4 together, the pumping preheating mechanism 200 includes an oil pump 210, a buffer tank 220, a preheating pipe 230, a heating device 240, a liquid level detection sensor 221, a temperature detection sensor 233 and a 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 then delivering the fuel to the burner 300 for burning.
The oil pump 210, the inlet end of the oil pump 210 is connected with the fuel storage tank 100 through the oil delivery pipe 211. The oil pump 210 is mainly used to draw out the 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 outlet of the oil pump 210 is provided with an exhaust branch pipe 214 connected in parallel with the pump oil pipe 213, and an exhaust valve 215 is mounted on the exhaust branch pipe 214, and when oil pumping is started, the exhaust valve 215 can discharge the gas in the oil pump 210 and the pipe. For convenience of control, a valve 212 is provided on the oil delivery pipe 211 to control the delivery of fuel, for example, after baking is finished, the oil delivery pipe 211 can be closed by the valve 212. Valve 212 may be a manual valve.
The buffer tank 220, the pumping-out port of the oil pump 210 is connected to the buffer tank 220 through a pumping-out pipe 213, and the oil pump 210 pumps the fuel in the fuel storage tank 100 into the buffer tank 220. After the oil pump 210 sends the oil pump 210 to the buffer oil tank 220, the buffer oil tank 220 can temporarily store the fuel before preheating, and the structure has the advantages that the pressure fluctuation of the oil pump 210 can be relieved, so that the fuel supply pressure is more balanced, and the combustion is more stable and controllable. Preferably, a pressure detecting gauge is provided on the buffer tank 220 for observing the pressure in the buffer tank 220 from the outside at any time. Meanwhile, in order to prevent fuel in the buffer tank 220 from flowing back into the pumping pipe 213 and the oil pump 210 when the oil pump 210 is not in operation, a second electrically operated valve 216 is installed on the pumping pipe 213 for controlling the opening and closing of the pumping pipe 213.
The preheating pipe 230, and an inlet end of the preheating pipe 230 is connected to the buffer tank 220. The preheating pipe 230 mainly serves to supply the preheated fuel flowing from the buffer tank 220 to the burner 300. Specifically, the preheating pipe 230 may be a steel pipe. Preferably, a check valve 231 is provided on the preheating pipe 230 at a position near the buffer tank 220 to prevent the preheated fuel from flowing back into the buffer tank 220 from within the preheating pipe 230. 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 pressure.
Preferably, the pumping line 213 is connected to the lower portion of the buffer tank 220, and the preheating line 230 is connected to the upper portion of the buffer tank 220, so that fuel is inputted from the lower portion of the buffer tank 220 and discharged from the upper portion of the buffer tank 220, and the structure is such that the fuel gradually slowly overflows into the preheating line 230 to be heated continuously, and thus fuel interruption can be avoided.
A heating device 240 is 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, and the electromagnetic heating coil 241 is wound around the preheating pipe 230, and the fuel in the preheating pipe 230 is heated by the electromagnetic heating coil 241. The fuel may be preheated to 150 c, for example.
Preferably, the preheating pipe 230 is vertically arranged with a part wound with the electromagnetic heating coil 241 and is positioned above the interface between the preheating pipe 230 and the buffer tank 220, so that the fuel in the buffer tank 220 can overflow gradually and be conveyed into the preheating pipe 230, and is heated sufficiently and uniformly 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 to detect a liquid level value in the buffer tank 220. The level detection sensor 221 may be a float level gauge.
The temperature detection sensor 233 is disposed in the preheating duct 230. Specifically, a temperature detection sensor 233 is provided in the preheating pipe 230 around which 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 assembly 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 detection sensor 233 is electrically connected to a pumping preheating control assembly, which is electrically connected to an electromagnetic heating controller. The temperature detection sensor 233 transmits the preheating temperature value of the fuel to the oil pumping preheating control unit, and the electromagnetic heating controller controls the heating of the preheating pipe 230 by the electromagnetic heating coil 241 according to a command from the oil preheating bake control unit. For example, the preheating temperature of the fuel is set to be 150 ℃ to 160 ℃, when the temperature detection sensor 233 detects that the temperature of the fuel is lower than 150 ℃, if the electromagnetic heating coil 241 is still heating at this time, the oil pumping preheating control component controls the electromagnetic heating controller to continue heating the electromagnetic heating coil 241, and if the electromagnetic heating coil 241 stops heating at this time, the oil pumping preheating control component controls the electromagnetic heating controller to start heating the electromagnetic heating coil 241. When the temperature detection sensor 233 detects that the fuel temperature is between 150 ℃ and 160 ℃, the oil pumping preheating control assembly controls the electromagnetic heating controller to keep the existing action unchanged. When the temperature detection sensor 233 detects that the temperature of the fuel is above 160 ℃, the oil pumping preheating control assembly controls the electromagnetic heating controller to be closed so that the electromagnetic heating ring 241 stops heating.
Referring to fig. 8, the liquid level detection sensor 221 is electrically connected to a pumping preheating control assembly, which is electrically connected to the control ends of the oil pump 210 and the second electrically operated valve 216, respectively. The liquid level value of the buffer tank 220 detected by the liquid level detection sensor 221 is transmitted to the pumping preheating control assembly, and the oil pump 210 and the second electric valve 216 act according to the control command of the pumping preheating control assembly. For example, a range of liquid level values of the fuel pump is set, for example, 5L-8L, when the liquid level detection sensor 221 detects that the liquid level value is lower than 5L, if the second electric valve 216 is in an open state and the oil pump 210 is in an oil pumping state, the oil pumping preheating control assembly controls the oil pump 210 and the second electric valve 216 to keep the existing state unchanged, and if the second electric valve 216 is in a closed state and the oil pump 210 is also in a stop state, the oil pumping preheating control assembly controls the second electric valve 216 to be opened and simultaneously starts the oil pump 210 to perform oil pumping operation. When the liquid level detection sensor 221 detects that the liquid level value is 5L-8L, the oil pumping preheating control assembly controls the second electric valve 216 and the oil pump 210 to keep the existing state unchanged. When the liquid level detection sensor 221 detects that the liquid level value is above 5L-8L, the oil pumping preheating control assembly controls the second electric valve 216 to be closed, and simultaneously 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 spray pipe body 310, a combustion pipe body 320, an igniter 330, and a blowing device 340.
The injection pipe body 310, the injection pipe body 310 includes an injection end 311 and an oil supply end 312, and the oil supply end 312 is connected to an outlet end of the preheating pipe 230. The injection pipe 310 is mainly used for injecting preheated fuel, and the fuel is input from the fuel supply end 312 and injected from the fuel injection end 311. Specifically, the injection pipe body 310 is a tubular structure made of steel, and the injection end 311 thereof is converged to form a conical nozzle, however, in other embodiments, the injection end 311 may be a nozzle structure, or a nozzle may be mounted on the injection pipe body 310 to form the injection end 311.
The combustion tube 320 has a combustion nozzle end 321 and a closed end 322, and the fuel injection end 311 is disposed within the combustion tube 320 and adjacent to the combustion nozzle end 321. The combustion tube 320 mainly serves as a combustion place for fuel oil. Specifically, the injection tube 310 is disposed on an axis within the combustion tube 320, wherein the injection end 311 is near the combustion nozzle end 321, and the supply end 312 extends outward through the closed end 322. Preferably, a uniform jet plate 323 is installed in the combustion nozzle end 321, the uniform jet plate 323 is a circular plate matched with the combustion tube body 320, a plurality of through holes 324 are formed in the circular plate, the through holes 324 can divide fuel into a plurality of strands for combustion, and a certain gap is formed between the strands, so that the fuel can be fully combusted, and the combustion efficiency is improved.
The igniter 330 is disposed in the injection pipe 310 and is disposed near the injection end 311. The igniter 330 is mainly used for igniting the fuel injected from the injection end 311. The igniter 330 may be a fuel igniter 330.
And the air blowing device 340, wherein an 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 burning fuel oil sprayed from the oil injection end 311. Specifically, the air inlet 550 of the air blower 340 is disposed outside the tobacco flue-curing house, and the air outlet thereof is disposed on the wall surface of the combustion tube 320. The blower 340 may be a centrifugal blower.
After passing through the oil pumping preheating mechanism 200, the fuel oil has two characteristics: firstly, the temperature of the fuel is increased, and after being sprayed out by the oil spraying pipe body 310, the fuel can be instantaneously and rapidly ignited, so that the combustion efficiency can be improved; secondly, the pressure of the fuel is increased, and the fuel is almost sprayed in mist form from the injection end 311 of the injection pipe, so that the combustion can be more sufficient.
Referring to fig. 1 and 7 together, the heat dissipation structure 400 is disposed in the heating chamber 510, the heat dissipation structure 400 includes a heat dissipation cavity 410, and the combustion nozzle end 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 heat into the heating chamber 510 to provide heat required by flue-cured tobacco leaves in the flue-cured tobacco house. The heat radiation structure 400 is mainly used to radiate heat generated by the combustion of the burner 300 into the heating chamber 510. Specifically, the heat dissipation cavity 410 has a conical cavity structure with a smaller top and a larger bottom, and a mounting hole 411 is formed at the lower part of the heat dissipation cavity, and the nozzle end of the combustion tube 320 extends into the heat dissipation cavity 410 through the mounting hole 411. The heat dissipation chamber 410 is made of a heat conductive metal material, such as steel, iron, etc.
An exhaust pipe 412 is also provided 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 chamber 410, and the other end extends out of the heating chamber 510, so as to exhaust the exhaust gas generated by combustion to the outside of the heating chamber 510.
Preferably, the heat dissipation structure 400 further includes a plurality of heat pipes 430, and the plurality of heat pipes 430 are disposed on the heat dissipation cavity 410. Specifically, a heat conducting bracket 420 is connected to the upper end surface of the heat dissipating cavity 410, and a plurality of heat conducting pipes 430 are horizontally arranged on the heat conducting bracket at intervals. For example, the heat conducting bracket 420 is two heat conducting fins welded on the upper end face of the heat dissipating cavity 410 and opposite to each other, and two ends of the plurality of heat conducting pipes 430 are welded on the two heat conducting fins respectively. The heat conducting bracket 420 and the heat conducting tube 430 are made of a heat conducting metal material, such as steel, iron, etc.
When the burner 300 burns, the heat dissipation cavity 410 can transfer heat to the heat conduction bracket 420, and then the heat conduction bracket 420 transmits the heat to the heat conduction pipe 430, and the heat conduction pipe 430 dissipates the heat into the heating chamber 510. The structure can increase the heat radiating area, prolong the heat radiating time and improve the utilization rate of heat.
Preferably, a fan 440 is installed above the heat pipes 430, and the fan 440 mainly plays a role of upward or downward conveying of air flow, so that heat generated by the combustion furnace and emitted by the heat pipes 430 is upward or downward conveyed, and a descending tobacco flue-curing house or an ascending tobacco flue-curing house is formed. The fan 440 may be an axial flow fan horizontally mounted above the plurality of heat conductive pipes 430 by a mounting bracket.
Generally, the existing tobacco flue-curing house 500 is also provided with a baking control assembly in a matching manner, and a temperature and humidity detecting device is further installed in the tobacco flue-curing house 520 and is electrically connected with the baking control assembly. The temperature and humidity detecting device is mainly used for sensing the baking temperature in the smoke chamber 520 to be used as a basis for adjusting the burner 300. The temperature and humidity detection device can be a temperature and humidity sensor. The curing control component can be a controller, such as a PLC singlechip, which is a common control device on a tobacco curing house.
A moisture discharging window is arranged in the smoke containing chamber 520, a moisture discharging fan is arranged on the moisture discharging window, and the control end of the moisture discharging fan is electrically connected with the baking control assembly. The humidity exhaust fan is mainly used for exhausting humidity, and when the temperature and humidity detection device detects that the humidity in the smoke containing chamber 520 exceeds a set value, the baking control assembly controls the humidity exhaust fan to operate for performing the humidity exhaust treatment.
For convenience, intelligent control of the burner 300 is achieved and is associated with regulation of the tobacco curing barn 500. A first electrically operated valve 313 is provided on the injection pipe 310, and the first electrically operated valve 313 is mainly used for closing and opening the injection pipe 310, i.e. determining whether to perform injection or not, and because the position is close to the injection end 311, the combustion can be quickly extinguished when needed.
Referring to fig. 9, the baking control assembly is electrically connected to the control end 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 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 switching of the air blowing device 340. The advantage of this kind of structure lies in, after the temperature and humidity that toast control assembly felt temperature and humidity detection device detected surpassed the setting value, again by toast the switch of control assembly control combustor 300, regard as the condition of control combustor 300 with the humiture in the tobacco flue-curing house 500 like this, can avoid the tobacco leaf to toast the damage that the combustor 300 malfunction caused.
When the baking is started, baking process parameters are input on a baking control component of the tobacco flue-curing house 500, then a valve 212 at the oil outlet of the fuel oil storage box 100 is opened, oil pumping liquid level value parameters and heating temperature of fuel oil on the oil pumping preheating mechanism 200 are set, the fuel oil is pumped into the buffer oil tank 220 from the fuel oil storage box 100 by the oil pump 210, enters the preheating pipeline 230 and is heated by the heating device 240, is supplied to the oil spraying pipeline and sprayed out from the oil spraying end 311, is ignited by the igniter 330, oxygen required by the combustion is supplied by the air blowing device 340, flame is sprayed into the heat dissipation cavity 410, heat is dissipated into the heating chamber 510 through the heat dissipation cavity 410 and the plurality of heat conduction pipes 430, finally hot air is conveyed into the tobacco filling chamber 520 from the air inlet 550 by the fan 440 to bake tobacco leaves, and the air flow after baking flows back into the heating chamber 510 through the air return opening 540 to circulate. During the baking process, the baking control assembly may regulate the burner 300 and the moisture removal fan according to the baking process. Meanwhile, the oil pumping preheating control component can supplement the fuel in the buffer oil tank 220 and regulate and control the heating temperature of the heating device 240.
The pumping preheating mechanism 200 in this embodiment may provide heat to one or more tobacco curing barns 500. When supplying heat to the plurality of tobacco houses 500, the preheating pipeline 230 is connected with the oil supply ends 312 of the plurality of burners 300 through the multi-way pipeline connector 234 and the oil pipeline 211, and the plurality of burners 300 are installed in the heating chambers 510 of different tobacco houses 500. Specifically, the burner 300 is mounted in a combustion chamber within the heating chamber 510. So that the burners 300 of different tobacco houses 500 can be supplied with oil through one preheating duct 230. The multi-way pipe fitting 234 may be a tee fitting or a four-way pipe fitting.
When the pumping preheating mechanism 200 supplies heat to a tobacco flue-curing house 500, the 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 the plurality of tobacco curing houses 500, the oil pumping preheating control assembly and the baking control assembly are different control assemblies, wherein the oil pumping preheating control assembly is mainly used for controlling the oil pumping preheating mechanism 200, and each baking control assembly is mainly used for controlling the baking of the corresponding tobacco curing houses 500.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (8)
1. The utility model provides a fuel preheats combustion formula tobacco flue-curing house, includes tobacco flue-curing house (500), tobacco flue-curing house (500) include heating chamber (510) and dress smoke chamber (520) be equipped with air intake (550) and return air inlet (540) on heating chamber (510) with partition wall (530) of dress smoke chamber (520), the steam that heating chamber (510) produced is followed air intake (550) enter into dress smoke chamber (520), to the tobacco leaf toast the back warp return air inlet (540) backward flow 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;
a pump preheat mechanism (200), comprising:
the inlet end of the oil pump (210) is connected with the fuel oil storage tank (100) through an oil pipeline (211);
-a buffer tank (220), a pump outlet of the oil pump (210) being connected to the buffer tank (220) by a pump oil conduit (213), the oil pump (210) pumping fuel from the fuel reservoir (100) into the buffer tank (220);
a preheating pipe (230), wherein the inlet end of the preheating pipe (230) is connected with the buffer oil tank (220);
a heating device (240) arranged near the preheating pipeline (230) and used for heating fuel oil in the preheating pipeline (230);
a burner (300) comprising:
the oil injection pipe body (310), 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 (320) having a combustion nozzle end (321) and a closed end (322), the fuel injection end (311) being disposed within the combustion tube (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) for igniting the 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 fuel oil injected from the oil injection end (311) during combustion;
the heat dissipation structure (400) is arranged in the heating chamber (510), the heat dissipation structure (400) comprises a heat dissipation cavity (410), the combustion nozzle end (321) of the combustion pipe body (320) extends into the heat dissipation cavity (410) so as to spray flame generated by the burner (300) into the heat dissipation cavity (410), and the heat dissipation cavity (410) dissipates heat into the heating chamber (510) so as to provide heat required by the flue-cured tobacco flue-curing house (500) for curing tobacco leaves;
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); 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 fuel from flowing back into the buffer oil tank (220) from the preheating pipeline (230).
2. The fuel preheating combustion type tobacco flue-curing house of claim 1, wherein: the tobacco flue-curing house (500) is also provided with a baking control component in a matched mode;
a temperature and humidity detection device is arranged in the smoke accommodating chamber (520), and the temperature and humidity detection device is electrically connected with the baking control assembly;
a moisture discharging window is arranged in the smoke containing chamber (520), a moisture discharging fan is arranged on the moisture discharging window, and the control end of the moisture discharging fan is electrically connected with the baking control assembly.
3. The fuel preheating combustion type tobacco flue-curing house of claim 2, wherein: the oil injection pipe body (310) is provided with a first electric valve (313);
the baking control assembly is electrically connected with the control end of the first electric 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 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 opening and closing of the air blowing device (340).
4. The fuel preheating combustion type tobacco flue-curing house of claim 1, wherein: the oil pumping preheating mechanism (200) further comprises:
a liquid level detection sensor (221) provided in the buffer tank (220);
a second electrically operated valve (216) provided on the oil pumping pipe (213);
the oil pumping preheating control assembly is 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 liquid level value of the buffer oil tank (220) detected by the oil pumping preheating control assembly 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-fired preheating combustion tobacco flue-curing house of claim 4, wherein: the heating device (240) comprises an electromagnetic heating controller and an electromagnetic heating ring (241), wherein the electromagnetic heating controller is electrically connected with the electromagnetic heating ring (241), and the electromagnetic heating ring (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 preheating combustion type tobacco flue-curing house of claim 1, wherein: the pump outlet 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).
7. The fuel preheating combustion type tobacco flue-curing house of claim 1, wherein: the heat dissipation structure (400) further comprises a plurality of heat conduction pipes (430), the heat conduction pipes (430) are arranged on the heat dissipation cavity (410), the heat dissipation cavity (410) transfers heat to the heat conduction pipes (430), and the heat conduction pipes (430) emit heat into the heating chamber (510).
8. The fuel preheating combustion tobacco flue-curing house according to any one of claims 1 to 7, wherein: the preheating pipeline (230) is connected with oil supply ends (312) of a plurality of burners (300) through a multi-way pipeline joint (234) and an oil pipeline (211), and the burners (300) are arranged in heating chambers (510) of different tobacco flue-curing houses (500).
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| CN201910842875.9A CN110574955B (en) | 2019-09-06 | 2019-09-06 | Fuel preheating combustion type tobacco flue-curing house |
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| DE102010020430A1 (en) * | 2010-05-12 | 2011-11-17 | Propellet Gmbh | Furnace device has baking- or roasting chamber and burner unit for heating baking- or roasting chamber which is impinged by burner unit over inlet opening |
| CN102697157A (en) * | 2012-06-19 | 2012-10-03 | 集美大学 | High-efficiency and energy-saving intensive tobacco flue-curing house |
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| CN210929592U (en) * | 2019-09-06 | 2020-07-07 | 贵州省烟草公司黔东南州公司 | Fuel preheating combustion type tobacco flue-curing house |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7850445B2 (en) * | 2003-05-28 | 2010-12-14 | Ryan Thomas Bechard | Oil preheater for a multi oil burner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010020430A1 (en) * | 2010-05-12 | 2011-11-17 | Propellet Gmbh | Furnace device has baking- or roasting chamber and burner unit for heating baking- or roasting chamber which is impinged by burner unit over inlet opening |
| EP2549182A1 (en) * | 2011-07-21 | 2013-01-23 | PLANIKA Sp. z.o.o. | A liquid fuel-fired furnace appliance for fireplace |
| CN102697157A (en) * | 2012-06-19 | 2012-10-03 | 集美大学 | High-efficiency and energy-saving intensive tobacco flue-curing house |
| CN106418639A (en) * | 2016-09-30 | 2017-02-22 | 广东省烟草南雄科学研究所 | Tobacco leaf curing device and method for both alcohol group and diesel fuel |
| CN210929592U (en) * | 2019-09-06 | 2020-07-07 | 贵州省烟草公司黔东南州公司 | Fuel preheating combustion type tobacco flue-curing house |
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