CN210801157U - Preheating type fuel oil combustion device - Google Patents

Abstract

The utility model discloses a preheating-type fuel combustion device, 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 blower, 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 device can solve the technical problems of lower heat value, insufficient combustion and unstable combustion flame of the existing fuel oil combustion device.

Description

Preheating type fuel oil combustion device

Technical Field

The utility model relates to a preheating-type fuel combustion device belongs to the combustor field.

Background

The existing fuel oil combustion device generally uses compressed air to pressurize a fuel oil tank, so as to force a proper amount of fuel oil to be injected to a combustor for combustion. This fuel burning method has the following problems: 1. the fuel oil is directly injected and combusted, the calorific value is low, and the fuel oil cannot be fully combusted; 2. the pressure fluctuates during fuel injection, and the combustion flame is not stable enough.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the utility model provides a preheating-type fuel combustion device to solve the calorific value that current fuel combustion device exists lower, the burning is not abundant, the not stable enough technical problem of burning flame.

The technical scheme of the utility model is that: a pre-heated fuel oil combustion apparatus comprising:

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

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

and the fan outlet of the air blower 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 combustion pipe body to air required by the combustion of the fuel sprayed from the oil injection end.

Furthermore, the combustor also comprises a combustion control assembly, and a first electric valve is arranged on the oil injection pipe body;

the combustion control assembly is electrically connected with the control end of the first electrically operated valve;

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

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

the opening and closing of the first electrically operated valve, the ignition of the igniter, and the switching of the blower are controlled by the combustion control assembly.

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 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.

Furthermore, a pressure release valve is arranged on the preheating pipeline.

Furthermore, the preheating pipeline is connected with the oil supply ends of the plurality of burners through multi-way pipeline joints and oil pipelines.

The utility model has the advantages that: during combustion, fuel is pumped from the fuel storage tank to the buffer fuel tank by the oil pump, enters the preheating pipeline and is heated by the heating device, then is supplied to the fuel injection pipeline and is sprayed out from the fuel injection end, the fuel is ignited by the igniter, the blower supplies oxygen required by combustion of the fuel, and flame generated by combustion of the fuel is sprayed out to supply heat. Compare with current fuel oil combustion apparatus, this device has three advantages: 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 preheating type fuel combustion apparatus 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 control structure diagram of the oil pumping preheating mechanism;

FIG. 8 is a control structure view of the burner;

description of reference numerals:

100 fuel storage tanks, 200 oil pumping preheating mechanisms and 300 burners;

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.

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 to 8 are schematic structural diagrams of a preheating type fuel combustion apparatus according to an embodiment. The preheating type fuel combustion device comprises a fuel storage tank 100, an oil pumping preheating mechanism 200 and a burner 300. 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. 7, the temperature sensor 233 is electrically connected to the oil pumping preheating control assembly, and the oil pumping preheating control assembly is electrically connected to the electromagnetic heating controller. The temperature detecting sensor 233 sends the preheating temperature value of the fuel to 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 the command from the oil preheating combustion 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. 7, the liquid level detecting sensor 221 is electrically connected to the oil pumping preheating control assembly, and the oil pumping preheating control assembly 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 injection tube 310, a combustion tube 320, an igniter 330, a blower 340, and a combustion control assembly.

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 a blower 340340, a blower outlet of the blower 340 is arranged in the combustion tube body 320 and 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 for the combustion of the fuel injected from the oil injection end 311. Specifically, the air inlet of the blower 340 is disposed outside the tobacco flue-curing house, and the outlet of the blower is disposed on the wall of the combustion pipe 320. The blower 340 may be a centrifugal blower.

After the fuel oil passes through the oil pumping preheating mechanism 200, the fuel oil has the following three advantages: 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 oil is increased, and the fuel oil is almost sprayed out in a mist form from the oil spraying end 311 of the oil spraying pipe, so that the combustion can be more sufficient; thirdly, the fuel is not directly injected by the pressure provided by the oil pump 210, but is stored and buffered by the buffer oil tank 220, so that the pressure fluctuation of the fuel can be reduced, the fuel can gradually and slowly overflow into the preheating pipeline 230 to be continuously heated, and the fuel cut-off is avoided.

The combustion control assembly is used primarily to control the operation of the combustor 300. The combustion control assembly may be a controller, such as a PLC single chip, which is a common control device.

Referring to fig. 8, in order to facilitate the intelligent control of the burner 300. 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.

The combustion control assembly is electrically connected to a control terminal of the first electrically operated valve 313. The combustion control assembly is electrically connected with the control end of the igniter 330, the combustion control assembly is electrically connected with the control end of the blower 340, and the combustion 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 blower 340 so as to facilitate the control

The oil pumping preheating mechanism 200 in this embodiment can supply oil to one or more burners 300. When a plurality of burners 300 are supplied with oil, the preheating pipe 230 is connected to the oil supply ends 312 of the plurality of burners 300 through the multi-channel joint 234 and the oil delivery pipe 211. In this way, different burners 300 can be supplied with oil via one preheating line 230. The multi-way pipe joint 234 may be a tee pipe joint or a four-way pipe joint.

When the oil preheating mechanism 200 supplies oil to one burner 300, the oil preheating control assembly and the combustion control assembly may be the same control assembly or different control assemblies. When the oil pumping preheating mechanism 200 supplies oil to the plurality of burners 300, the oil pumping preheating control assembly and the combustion 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 combustion control assembly is mainly used for controlling the baking of the corresponding tobacco flue-curing house.

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 (9)

1. A preheating type fuel oil combustion device is characterized by comprising:

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

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

a blower (340), a blower outlet of the blower (340) is arranged in the combustion tube body (320) and is positioned between the oil injection end (311) and the closed end (322) so as to convey air outside the combustion tube body (320) to air required by fuel oil sprayed from the oil injection end (311) during combustion.

2. The preheating type fuel combustion apparatus according to claim 1, wherein: the combustor (300) further comprises a combustion control assembly, and a first electric valve (313) is arranged on the oil injection pipe body (310);

the combustion control assembly is electrically connected with a control end of the first electrically operated valve (313);

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

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

the opening and closing of the first electrically operated valve (313), the ignition of the igniter (330), and the switching of the blower (340) are controlled by the combustion control assembly.

3. The preheating type fuel combustion apparatus according to claim 1, wherein: 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.

4. The preheating type fuel combustion apparatus according to claim 3, wherein: 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 control assembly.

5. The preheating type fuel combustion apparatus according to claim 1, wherein: 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).

6. The preheating type fuel combustion apparatus according to claim 1, wherein: 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).

7. The preheating type fuel combustion apparatus according to claim 1, wherein: 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).

8. The preheating type fuel combustion apparatus according to claim 1, wherein: and a pressure relief valve (232) is arranged on the preheating pipeline (230).

9. A preheating type fuel oil combustion apparatus according to any one of claims 1 to 8, wherein: the preheating pipeline (230) is connected with the oil supply ends (312) of the plurality of burners (300) through a multi-channel pipeline joint (234) and an oil conveying pipeline (211).

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