Alcohol-based fuel burner

Abstract

The present invention relates to an alcohol-based fuel burner, which has two working stages: a start-up atomization combustion stage and a continuous gasification combustion stage. In the start-up atomization combustion stage, after the needle valve is opened, the fuel flows through an intelligent control system, and then flows into an atomization nozzle for spraying and atomization. The atomized fuel is burned after being ignited successfully by a pulse ignition device. In the continuous gasification combustion stage, the flame under the fuel atomization combustion heats the fuel flowing in the gasification spiral tube, and the fuel is sprayed out through an ejector for gasification combustion. The alcohol-based fuel burner provided by the present invention does not require additional equipment to assist gasification combustion, and burns while gasifying, with stable combustion operation and high combustion efficiency.

Description

Technical Field

[0001] The invention relates to a stove, in particular to an alcohol-based fuel burner. Background Art

[0002] Alcohol-based liquid fuel is mainly a fuel mixed with methanol and ethanol discarded after industrial use. It has a wide source, low price, easy to use and environmentally friendly. Therefore, it has broad application prospects, especially in small restaurants, large hotels and canteens. However, the development of alcohol-based burners is seriously lagging, which limits the large-scale application of alcohol-based fuels. Common alcohol-based fuel burners and alcohol-based fuel burners are now more commonly used. The working principle of the burner is to directly spray the alcohol-based fuel, atomize or gasify it and mix it with air for combustion. Atomization combustion requires strict control of the atomization quality, otherwise it will lead to incomplete combustion and produce harmful gases, so the burner with atomization combustion has not been widely promoted. Most of them now use gasification combustion. Gasification combustion requires liquid fuel to be gasified first. If an external gasification device is used for gasification, the overall energy consumption of the burner will be increased. Therefore, the alcohol-based fuel burner with gasification combustion has high requirements for the vaporizer. Therefore, reasonable placement of the gasification device and optimization of the burner structure are key technologies for large-scale application. Reasonable burner structure setting is conducive to controlling the combustion mode of alcohol-based fuel and improving the overall combustion efficiency of the burner. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an alcohol-based fuel burner, which mainly does not require external equipment to assist gasification and combustion, burns while gasifying, has stable combustion operation and high combustion efficiency.

[0004] The present invention achieves the above technical problems through the following technical solutions:

[0005] An alcohol-based fuel burner comprises a combustion chamber, an intelligent control system, a fuel tank and a tail liquid collection part, wherein the combustion chamber is stably supported by a fixed mounting frame, the wall surface of the fixed mounting frame under the combustion chamber is provided with an intelligent control system, one end of the fuel tank is connected to the intelligent control system through a fuel supply pipe, a needle valve is installed on the fuel supply pipe, the combustion chamber comprises a conical heat insulation board, the conical heat insulation board is installed on the upper end of the fixed mounting frame, a gasification spiral pipe distributed in a spiral is arranged on the inner wall of the conical heat insulation board, the inlet of the gasification spiral pipe is at the top and the outlet is at the bottom, a gas collecting ring pipe is fixedly arranged at the bottom of the conical heat insulation board, a connected ejector group is distributed on the gas collecting ring pipe, a low-pressure atomizing nozzle is fixedly arranged at the center of the gas collecting ring, the upper inlet of the gasification spiral pipe is connected to the intelligent control system, and the intelligent control system has three outlet fuel ports. The pipeline is respectively connected to the inlet of the low-pressure atomizing nozzle, the inlet of the gas collecting ring pipe and the inlet of the gasification spiral pipe. A solenoid valve is respectively connected to the outlet fuel pipe, and the solenoid valve is electrically connected to the intelligent control system. The solenoid valves are all electrically connected to the firepower adjustment knob arranged on the intelligent control system; the intelligent control system also includes a pulse ignition unit and an ion type flameout protection unit, the ignition needle of the pulse ignition unit is fixed above the atomizing nozzle, the pulse ignition unit is electrically connected to the ignition switch arranged on the intelligent control system, the flame detection needle of the ion type flameout protection unit is fixed above the ejector and the atomizing nozzle, and the ion type flameout protection unit is electrically connected to the intelligent control system; a fan is installed below the intelligent control system, and the fan is electrically connected to the wind power adjustment knob arranged on the intelligent control system.

[0006] Furthermore, the fan supplies air through an air inlet arranged on the side wall of the conical heat insulation board, and the air inlet is inclined relative to the side wall of the conical heat insulation board.

[0007] Furthermore, the other end of the fuel tank is connected to a fuel replenishing pipeline, and a float valve is provided at the interface between the fuel replenishing pipeline and the fuel tank. A certain space is left inside the fuel tank and is filled with 0.5MPa nitrogen.

[0008] Furthermore, the shape of the conical heat insulation plate matches the atomization area of ​​the low-pressure atomization nozzle.

[0009] Furthermore, the tail liquid collecting part comprises a tail liquid collecting disc, which is arranged above the gas collecting ring pipe and has a sealed cover, and a drainage groove is opened on the inner wall of the conical insulation board, and the drainage groove extends to the tail liquid collecting disc.

[0010] Furthermore, a filter screen is provided at the junction of the fuel tank and the fuel supply pipe.

[0011] Furthermore, it also includes a plurality of self-adjusting brackets, which are mounted on the upper end of the fixed mounting frame and extend to the interior of the combustion chamber.

[0012] Furthermore, the low-pressure atomizing nozzle is a swirl atomizing nozzle.

[0013] Furthermore, the ejector group is evenly placed on the gas collecting ring pipe, and the ejector group includes 6 ejectors.

[0014] Furthermore, the low-pressure atomizing nozzle is placed at the center of the gas collecting ring pipe, and the installation positions of the two are horizontal, and both are placed on the lower end surface of the conical heat insulation board.

[0015] Beneficial Effects

[0016] The fuel tank of the present invention is pressurized to about 0.5MPa with nitrogen, and the pressure of the fuel tank itself is utilized to make the low-pressure atomizing nozzle spray atomization, without the need for an additional supercharging device, thereby reducing the overall energy consumption of the burner. The present invention adopts low-pressure atomizing nozzle atomization, and because the atomization area is hollow conical, the conical heat insulation board provided is matched therewith, and the gasification spiral tube is coiled on the conical heat insulation board, and the fuel in the gasification spiral tube can obtain more heat during atomization combustion, and sufficient fuel is quickly provided for gasification combustion. The tail liquid collecting part designed by the present invention avoids the waste of fuel and volatilization into the atmosphere, and can be reused for a second time. The air intake mode used by the present invention makes the air in the burner vortex-shaped, so that the fuel and air are evenly mixed, thereby increasing the combustion efficiency. The present invention is intended to be applied to canteens and restaurants, and is a civilian alcohol-based fuel burner, with a simple structure and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an alcohol-based fuel burner of the present invention.

[0018] Figure 2 It is a top view inside the combustion chamber of the present invention.

[0019] Figure 3 It is a schematic diagram of the air inlet structure of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the gas collecting ring pipe of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the atomizing nozzle pulse ignition device and the ion type flameout protection device of the present invention.

[0022] Figure 6 It is a schematic diagram of the fixed structure of the gasification spiral tube.

[0023] Figure 7 It is a schematic diagram of the logic circuit of the intelligent control system of the alcohol-based burner. DETAILED DESCRIPTION

[0024] An alcohol-based fuel burner comprises a combustion chamber, an intelligent control system 19, a fuel tank 28 and a tail liquid collection part, wherein the combustion chamber is stably supported by a fixed mounting frame, the wall of the fixed mounting frame under the combustion chamber is provided with an intelligent control system 19, one end of the fuel tank 28 is connected to the intelligent control system 19 through a fuel supply pipe 27, a filter screen 3 is provided at the junction of the fuel tank 28 and the fuel supply pipe 27, the other end of the fuel tank 28 is connected to a fuel replenishment pipeline 1, a float valve 2 is provided at the interface between the fuel replenishment pipeline 1 and the fuel tank 28, a certain space is reserved inside the fuel tank 28, and 0.5MPa nitrogen is filled therein, the fuel tank 28 can be atomized and burned by the fuel tank 28's own pressure (N2 pressurization), no external boosting equipment is required, and low-energy consumption operation is achieved; a needle valve 4 is installed on the fuel supply pipe 27, and the needle valve 4 is used to control the outflow and flow of the fuel. The combustion chamber comprises a conical heat insulation board 12, which is mounted on the upper end of a fixed mounting frame. The inner wall of the conical heat insulation board 12 is provided with a spirally distributed gasification spiral pipe 7, which is formed by a gasification spiral pipe 7. Figure 6 The fixing member shown is fixed to the inner wall of the conical heat insulation board 12, the inlet 6 of the gasification spiral tube 7 is at the top, and the outlet 8 is at the bottom. The bottom of the conical heat insulation board 12 is fixed with the following Figure 4The gas collecting ring pipe 13 shown in the figure has a connected ejector group distributed on the gas collecting ring pipe 13, and the ejector group includes 6 ejectors 10. A low-pressure atomizing nozzle 11 is fixedly provided at the center of the gas collecting ring, and the installation positions of the two are horizontal, and are both placed on the lower end surface of the conical heat insulation board 12. The low-pressure atomizing nozzle 11 is a swirl atomizing nozzle, and the shape of the conical heat insulation board 12 matches the atomizing area of ​​the low-pressure atomizing nozzle 11. Because the atomizing area of ​​the nozzle is a hollow cone, the shape of the conical heat insulation board 12 matches it. During combustion, the flame heats the fuel flowing in the gasification spiral tube 7 on the side wall and the heat receiving body above, so that the fuel in the gasification spiral tube 7 can more easily reach the steam state, thereby improving the combustion efficiency of the entire burner. The upper inlet of the gasification spiral tube 7 is connected to the intelligent control system 19, and the intelligent control system 19 has three outlet fuel pipelines 17, 18, and 25, which are respectively connected to the inlet of the low-pressure atomizing nozzle 11, the inlet of the gas collecting ring tube 13, and the inlet of the gasification spiral tube 7. The outlet fuel pipelines 17, 18, and 25 are respectively connected with a solenoid valve 5, 15, and 16, and the solenoid valves 5, 15, and 16 are electrically connected to the intelligent control system 19. The solenoid valves 5, 15, and 16 are all electrically connected to the firepower adjustment knob 24 set on the intelligent control system 19; the intelligent control system 19 also includes a pulse ignition unit and an ion flameout protection unit, and the pulse The ignition needle 32 of the pulse ignition unit is fixed above the atomizing nozzle, the pulse ignition unit is electrically connected to the ignition switch 21 arranged on the intelligent control system 19, the flame detection needle 33 of the ion flameout protection unit is fixed above the ejector 10 and the atomizing nozzle, and the ion flameout protection unit is electrically connected to the intelligent control system 19; a fan 23 is installed below the intelligent control system 19, and the fan 23 is electrically connected to the wind force adjustment knob 21 arranged on the intelligent control system 19. The fuel is first atomized and burned, and then the fuel is heated to vaporize, and gasification combustion is continuously performed to improve the combustion quality, forming a combustion mode in which gasification combustion is mainly and atomization combustion is auxiliary.

[0025] like Figure 3 As shown, the fan 23 supplies air through the air inlet 14 arranged on the side wall of the conical insulation board 12. The air inlet 14 is inclined relative to the side wall of the conical insulation board 12. The air enters the gap between the clamping plates of the conical insulation board 12 and is sprayed into the internal space at a certain inclined angle from the holes drilled in the inner wall to form a cyclone, thereby improving the combustion efficiency.

[0026] The tail liquid collecting part includes a tail liquid collecting disc 31, which is arranged above the gas collecting ring pipe 13 and has a sealed cover. A drainage groove 30 is opened on the inner wall of the conical insulation plate 12, and the drainage groove 30 extends to the tail liquid collecting disc 31. A tail liquid collecting disc 31 is arranged at the bottom of the burner. After the needle valve 4 is closed and the burner stops burning, the fuel that has not been completely burned in the air sprayed from the nozzle and the ejector 10 adheres to the inner wall and flows along the drainage groove 30 into the disc, and then there is an openable and closable cover structure above the disc to prevent the fuel from evaporating.

[0027] It also includes a plurality of self-adjusting brackets 9, which are mounted on the upper end of the fixed mounting frame and extend to the interior of the combustion chamber.

[0028] When implementing it, as shown in the attached Figure 1 , Figure 2As shown, an alcohol-based fuel burner of the present invention comprises a needle valve 4, a gasification spiral tube 7, a self-adjusting bracket 9, an ejector 10, a low-pressure atomizing nozzle 11, a conical heat insulation board 12, a gas collecting ring tube 13, fuel pipelines 17, 18, 25, 26, an intelligent control system 19, a fixed mounting frame 22, a fan 23, a fuel supply pipe 27, a fuel tank 28, and a tail liquid collection tray 31. The needle valve 4 is used to adjust the flow of the fuel supply pipe 27, which is manually adjusted. The gasification spiral tube 7 is spirally distributed on the inner wall of the conical heat insulation board 12, with the inlet 6 at the top and the outlet 8 at the bottom. The shape of the conical heat insulation board 12 matches the atomization area of ​​the low-pressure atomizing nozzle 11, which can improve the combustion efficiency. The self-adjusting bracket 9 is used to adjust the position of the heat receiving body. The gas collecting ring tube 13 is connected to the fuel pipeline 18 so that the fuel is evenly ejected from the six ejectors. The intelligent control system 19 uses 220V AC power, and includes a fire power adjustment knob 21, a wind power adjustment knob 20, an ignition switch 24, and an ion flameout protection unit. The intelligent control system 19 is electrically connected to the solenoid valves 5, 15, and 16. The fire power adjustment knob 21 is electrically connected to the solenoid valve 15, and the fire power can be adjusted by adjusting the opening of the solenoid valve 15 through the fire power adjustment knob 21. The wind power adjustment knob 20 is electrically connected to the fan 23, and the fan also uses 220V AC power. The wind power is adjusted by adjusting the rotation speed of the fan blades to adjust the air intake rate. The wind power gear matches the fire power gear. The ignition switch 24 is electrically connected to the pulse ignition device, and the pulse ignition device is electrically connected to the ignition needle 32. The ion flameout protection device is electrically connected to the flame detection needle 33. During gasification combustion, when the flame is accidentally extinguished, the flame detection needle above the ejector cannot detect the flame, and the flameout protection device of the ejector transmits a signal back to the intelligent control system 19, closes the valve 15, and the fuel will no longer be sprayed out; or in other words, in the atomization combustion stage, the solenoid valve 16 is opened, but the ignition is unsuccessful, and the flame detection needle above the atomization nozzle cannot detect the flame, and the solenoid valve 16 will be controlled to close and stop the fuel from being sprayed out. One end of the fuel tank 28 is connected to the fuel replenishment pipeline 1, and the other end is connected to the fuel supply pipe 27. The float valve 2 is installed at the interface between the fuel replenishment pipeline 1 and the fuel tank 28, and the filter 3 is installed at the interface between the fuel supply pipe 27 and the fuel tank 28. A certain space is left inside the fuel tank, which is 0.5MPa nitrogen, providing pressure to press the fuel into the fuel supply pipe 27. The fuel in the fuel tank 28 decreases and the liquid level drops, and the float of the float valve 2 also drops accordingly. The float valve opens, and the fuel is added into the fuel tank 28, always keeping the pressure in the fuel tank 28 stable.

[0029] The tail liquid collecting part 31 is a disc structure. After the needle valve 4 is closed and the burner stops burning, the fuel ejected from the ejector that has not been completely burned in the air adheres to the inner wall and flows into the disc along the drainage groove 30. Then there is an openable cover structure above the disc to prevent the fuel from evaporating. Figure 2 The number of middle drainage slots is for reference only.

[0030] Working principle of the present invention:

[0031] The fuel of the fuel supply pipe 27 flows through the intelligent control system 19, and then the fuel is transported to the low-pressure atomizing nozzle 11 for atomization. The ignition needle 32 of the pulse ignition device ignites the atomized alcohol-based fuel, and the fan 23 starts to work, continuously burning and heating the fuel in the gasification spiral tube 7. The heated fuel is ejected from the ejector 10 for gasification and combustion. The outlet 8 end of the gasification spiral tube 7 is connected to the intelligent control system 19, and the fuel enters the gas collecting ring tube 13 through the fuel pipeline. At this time, the liquid fuel of the low-pressure atomizing nozzle 11 stops being supplied, and the fuel is ejected from the gas collecting ring tube 13 through the ejector 10 for gasification and combustion. The afterburner is always in a gasification and combustion state, spraying, gasifying and burning at the same time.

[0032] The specific operation process of the present invention is as follows: start the fan 23, use the wind force adjustment knob 20 to adjust the air flow, start the intelligent control system 19, turn on the ignition switch 24, open the needle valve 4, and the fuel flows from the fuel tank 28 to the fuel supply pipe 27 after filtering out impurities through the filter 3, and is transported to the low-pressure atomizing nozzle 11 for atomization and spraying, and the ignition needle 32 ignites the fuel. The fan 23 blows air from the air inlet 14 to provide oxygen for fuel combustion. The flame detection needle 33 above the atomizing nozzle 11 detects the generation of flame, and controls the solenoid valves 5 and 15 to open, preparing for the next gasification and combustion stage. In the atomization stage, the fuel combustion heats the upper heat receiving body and the fuel in the gasification spiral tube. The heated fuel enters the gas collecting ring tube 13 along the fuel pipeline 18, and is sprayed from the ejector 10 for gasification and combustion, and then the solenoid valve 16 is manually closed to stop the atomization and combustion, leaving only the gasification and combustion. When the flame is extinguished unexpectedly, the flame detection needle above the ejector cannot detect the flame, and the flameout protection device of the ejector sends a signal back to the intelligent control system 19, closes the solenoid valve 15, and the fuel will not be sprayed out; or in the atomization combustion stage, the solenoid valve 16 is opened, but the ignition is unsuccessful, and the flame detection needle 33 above the atomization nozzle cannot detect the flame, and the solenoid valve 16 will be controlled to close and stop the fuel from being sprayed out. The unburned fuel or the unburned fuel can flow along the drainage groove 30 into the tail liquid collection disc 31 for closed storage for the next combustion use.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An alcohol-based fuel burner, characterized in that: It includes a combustion chamber, an intelligent control system, a fuel tank and a tail liquid collection part. The combustion chamber is firmly supported by a fixed mounting frame. The wall of the fixed mounting frame under the combustion chamber is provided with an intelligent control system. One end of the fuel tank is connected to the intelligent control system through a fuel supply pipe. A needle valve is installed on the fuel supply pipe. A filter is provided at the junction of the fuel tank and the fuel supply pipe. The other end of the fuel tank is connected to a fuel replenishment pipeline. A float valve is provided at the interface between the fuel replenishment pipeline and the fuel tank. A certain space is left inside the fuel tank and is filled with 0.5MPa nitrogen. The combustion chamber comprises a conical heat insulation plate, which is mounted on the upper end of a fixed mounting frame. A gasification spiral tube is arranged on the inner wall of the conical heat insulation plate, wherein the inlet of the gasification spiral tube is at the top and the outlet is at the bottom. A gas collecting ring tube is fixedly arranged at the bottom of the conical heat insulation plate, and a connected ejector group is distributed on the gas collecting ring tube. A low-pressure atomizing nozzle is fixedly arranged at the center of the gas collecting ring, and the low-pressure atomizing nozzle is a swirl atomizing nozzle. The shape of the conical heat insulation plate matches the atomizing area of ​​the low-pressure atomizing nozzle. The upper inlet of the gasification spiral tube is connected to the intelligent control system, and the intelligent control system has three outlet fuel pipelines, which are respectively connected to the low-pressure atomization nozzle inlet, the gas collecting ring tube inlet and the gasification spiral tube inlet. The outlet fuel pipes are respectively connected to a solenoid valve, which is electrically connected to the intelligent control system, and the solenoid valves are electrically connected to the firepower adjustment knob set on the intelligent control system; The intelligent control system also includes a pulse ignition unit and an ion flameout protection unit, wherein the ignition needle of the pulse ignition unit is fixed above the atomizing nozzle, the pulse ignition unit is electrically connected to the ignition switch provided on the intelligent control system, the flame detection needle of the ion flameout protection unit is fixed above the ejector and the atomizing nozzle, and the ion flameout protection unit is electrically connected to the intelligent control system; A fan is installed below the intelligent control system, the fan is electrically connected to the wind force adjustment knob arranged on the intelligent control system, and the fan supplies air through an air inlet arranged on the side wall of the conical heat insulation board, and the air inlet is inclined relative to the side wall of the conical heat insulation board; The tail liquid collecting part comprises a tail liquid collecting disc, which is arranged above the gas collecting ring pipe and has a sealed cover, and a drainage groove is opened on the inner wall of the conical heat insulation plate, and the drainage groove extends to the tail liquid collecting disc; It also includes a plurality of self-adjusting brackets, which are mounted on the upper end of the fixed mounting bracket and extend to the interior of the combustion chamber.

2. An alcohol-based fuel burner as claimed in claim 1, characterized in that: The ejector group is evenly placed on the gas collecting ring pipe, and the ejector group includes 6 ejectors.

3. An alcohol-based fuel burner as claimed in claim 1, characterized in that: The low-pressure atomizing nozzle is placed at the center of the gas collecting ring pipe, and the installation positions of the two are horizontal, and both are placed on the lower end surface of the conical heat insulation board.

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