JPH0263130B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention aims to continue vaporization combustion by mixing evaporated gas of fuel with combustion air and pressurizing it into a gas chamber, and then blowing it into a flame chamber. Even in cases where vaporizing combustion is extinguished, the odor of unburned gas generated during extinguishing of the vaporizing combustion can be reliably prevented from dispersing into the surroundings for any length of time, and clean combustion can be completed from beginning to end. This invention relates to a prevention method and device.

Conventionally, in the past, fuel, such as petroleum fuel, was fed into a rotating vaporization cylinder in a combustion cylinder, and the fuel was live-combusted in the combustion cylinder.Then, when the vaporization cylinder was heated by the raw combustion flame, The supplied fuel is evaporated and vaporized in the vaporization cylinder, and the generated vaporized gas is mixed with combustion air and injected into the flame chamber from the gas chamber located inside the combustion cylinder to continue vaporization and combustion. The ivy vaporizing burner was developed before the application of this application, for example, in
This method is publicly known as described in Japanese Patent No. 32094.

Problems to be Solved by the Invention By the way, in the above-mentioned known vaporizing burner,
If the fuel supply is cut off to extinguish the continued vaporization combustion, the fuel that diffuses and migrates in the vaporization cylinder before the oil supply is stopped will be prevented from vaporization combustion by the fuel supply being stopped. However, since the required concentration of vaporized gas cannot be obtained, this vaporized gas becomes diluted by the combustion air, remains unburned in the gas chamber as unburned gas, and Combustible gas is gradually ejected from the gas chamber over a long period of time, resulting in the disadvantage that after the vaporizing burner is extinguished, the odor of unburned gas is radiated into the surrounding area. do not have.

Therefore, when extinguishing vaporization combustion, the present invention aims to reduce the amount of combustion air blown to the gas chamber at the same time as stopping the supply of fuel so that residual unburned gas in the gas chamber is After reducing the amount to a very small amount that causes flashback combustion, the combustion gas is automatically controlled to increase more than the amount during vaporization combustion, and the combustion gas is quickly released from the gas chamber and the flame chamber to the outside. The object of the present invention is to provide a method and device for preventing bad odor during extinguishing a vaporizing burner, which can prevent the bad odor of unburned gas from being discharged into the surrounding area.

Means for Solving the Problems Therefore, the technical problem of the present invention is to quickly backfire the unburned gas generated when extinguishing vaporization combustion, and at the same time reliably and quickly transport the combustion gas to the gas chamber and The purpose is to fundamentally eliminate the odors caused by unburned gases from dispersing into the surrounding area by discharging them from the flame chamber to the outside.

In order to solve this technical problem, we have developed a method in which the evaporated gas of fuel is mixed with combustion air and injected into the gas chamber under pressure, and then the mixture is injected into the flame chamber to cause vaporization and combustion. When extinguishing vaporization combustion, the supply of fuel is stopped and at the same time, the amount of combustion air blown into the gas chamber is instantly changed from the constant amount during vaporization combustion to a very small amount to the extent that backfire combustion occurs in the gas chamber. After the remaining unburned gas was combusted in the gas chamber and the flame chamber, the combustion gas was extinguished while being discharged from the gas chamber and the flame chamber by immediately controlling the amount to be greater than the amount during vaporization combustion. A method for preventing bad odors during extinguishing in a vaporizing burner is provided, and a configuration for implementing the method is provided in which a vaporizing cylinder is provided in a combustion cylinder having a gas chamber on the inner periphery and communicating with the gas chamber. The combustion tube is rotatably arranged and is equipped with a blowing chamber on one side of the combustion tube that can blow combustion air into the gas chamber through the vaporization tube. An air volume adjustment device consisting of two dampers arranged at the intake port of the chamber and having main and sub-intake windows is connected to a control device, and the control device simultaneously stops the fuel supply to the oil pipe. In a vaporizing burner, the main and sub-intake windows are sequentially adjusted in opening so that they become a quantitative intake window during vaporization combustion, a small amount intake window during backfire combustion, and an increased intake window during combustion gas discharge. This is a device to prevent bad odors when extinguishing fires.

Operation The above technical method and its device operate as follows. That is, in FIGS. 1 to 6, if the burner is started now, the carburetor 9 will be rotated at high speed, and air will be blown from the main and sub-intake windows 21 and 22 of the air volume adjustment device 20 operated by the control device 29. A fixed amount of combustion air suitable for vaporization combustion taken into the chamber 2 is blown from the blowing chamber 2 to the gas chamber 8 through the vaporizing tube 9, and then most of it is sent from the gas chamber 8 to the flame chamber 7. is emitted by fumes. Under this condition, if fuel is sent from the oil pipe 15 to the inner circumference of the carburetor 9,
While the fuel is diffused and transferred along the inner periphery of the vaporization tube 9, it is atomized by the blowing action of the combustion air flowing through the rotational centrifugal force of the vaporization tube 9, and is atomized from the proximal open side circumference of the vaporization tube 9. It is sprayed into the flame chamber 7 and is ignited to cause raw combustion. When raw combustion occurs in the injection flame chamber 7 in this way, the vaporization tube 9 is intensely heated by the raw combustion flame, so that the fuel sent into the vaporization tube 9 after that is diffused and transferred. The generated vaporized gas is stirred and mixed with the combustion air to form a complete mixed gas, which is then pressure-fed into the gas chamber 8.Finally, it is injected from the gas chamber 8 into the flame chamber 7, and the previous raw material is emitted. It is ignited by the combustion flame and causes the vaporized combustion flame to rise. Therefore, after the supplied fuel is transferred from the raw combustion state to the vaporization combustion state, the vaporization cylinder 9 is heated by the rising vaporization combustion flame, so vaporized gas is continuously generated. Good vaporization combustion can be continued.

By the way, if the fuel supply to the oil pipe 15 is stopped in order to extinguish the ongoing vaporization combustion as necessary, a signal is immediately sent to the control device 29, the air volume adjustment device 20 is activated, and the air blow chamber 2 The main and sub-intake windows 21 and 22 are connected to the quantitative intake window 26 during vaporization combustion,
The opening is adjusted to form a small amount intake window 27 through which a very small amount of combustion air flows instantaneously to the extent that backfire combustion occurs in the gas chamber 8 . If you do,
As described above, by adjusting the main and sub-intake windows 21 and 22 from the quantitative intake window 26 to the minute intake window 27, the amount of combustion air is instantaneously reduced, so that the amount of combustion air is instantly reduced in the vaporization cylinder 9 before the fuel supply is stopped. The supplied fuel evaporates due to heating and becomes vaporized gas, and this vaporized gas is not blown out from the gas chamber 8 but becomes unburned gas and remains in the gas chamber 8 and the vaporization cylinder 9.
The pressure inside the gas chamber 8 is significantly reduced compared to when vaporization combustion continues, and flashback combustion occurs in which the gas chamber 8 is ignited from the eruption chamber 7, and all of the gas remaining in the gas chamber 8 and the vaporization cylinder 9 is ignited. Unburned gas is combusted in the gas chamber 8 and the jet flame chamber 7 with a minute amount of combustion air blown into the gas chamber 8 from the minute intake window 27 via the blower chamber 2. Immediately after the unburned gas is completely instantaneously combusted as described above, the control device 29 operates the blower regulating device 20 to change the main and sub-intake windows 21 and 22 from the minute intake window 27 to the quantitative intake window during vaporization combustion. 26
A larger intake window 28 is opened, and the increased amount of combustion air is blown into the gas chamber 8 from the blower chamber 2 all at once, and the combustion gas is discharged to the outside more quickly than the gas chamber 8 and the flame chamber 7. This will prevent any bad odor from radiating into the surrounding area. After that, the air blowing operation may be stopped after a certain period of time.

Embodiments The structure of a vaporizing burner for carrying out the method according to the present invention will be described based on embodiments shown in the accompanying drawings.

In FIGS. 1 and 6, reference numeral 1 denotes a bottomed cylindrical combustion tube with an open tip and a closed base end, and a blowing chamber 2 is adjacent to the bottomed side of the combustion tube 1. A combustion tube 1 and a ventilation chamber 2 are communicated through a vent 3 opened at the center of the bottomed side of the combustion tube 1. The entire inner periphery of the combustion tube 1 is opened on the inside of the central bulging step, and a large number of gas injection holes 6 are bored around the approximately front half of the combustion surface 5 of the tube wall, and the inside is provided with a flame chamber 7. The formed combustion disk 4 is stretched so that a gas chamber 8 is formed between the combustion tube 1 and the combustion disk 4. Reference numeral 9 denotes a vaporizer cylinder whose tip end is closed and whose base end is open, and the vaporizer cylinder 9 is mounted on the tip of a rotating shaft 10 inserted into the combustion cylinder 1 from the ventilation chamber 2 side. It is installed in the same condition. Reference numeral 11 denotes a blower tube, and the blower tube 11 is deeply inserted from the vent 3 of the combustion tube 1 toward the distal end side of the vaporization tube 9 and faces the vaporization tube 9.
An air mixture passage 12 is formed between the air cylinder 11 and the air cylinder 11, and the base end side of the air mixture passage 12 communicates with the gas chamber 8 through the opening of the combustion disk 4. An inverted conical fuel diffuser 13 is fixed to the tip of the vaporizer tube 9 facing the tip opening of the blower tube 11, and one end of the fuel diffuser 13 is connected to a fuel pump 14 on the outer surface of the fuel diffuser 13. The opening at the tip of the air pipe 15 is exposed.

Incidentally, the peripheral edge of the proximal open side of the carburetor tube 9 is bent outward to form a fuel splashing end 16 at the peripheral edge. There is an electric motor 1 in the above-mentioned ventilation chamber 2.
A blower impeller 18 is directly connected to the rotating shaft 10 of the electric motor 17, and the rotating shaft 1
The carburetor 9 and the blower impeller 18 are rotated at high speed by the zero rotation operation. An air intake port 19 is opened on one side of the ventilation chamber 2, and an air volume adjustment device 20 is disposed in the air intake port 19, and the operation of the air volume adjustment device 20 ensures sufficient combustion for normal vaporization combustion. After inhaling the combustion air, a smaller amount of combustion air, and even more combustion air than the amount of air blown during vaporization combustion into the ventilation chamber 2 through the intake port 19, the vaporization tube 9
Air can be blown into the gas chamber 8 through the gas chamber 8.

As shown in FIGS. 1 to 3 as an example, the air volume adjustment device 20 has an air intake port 19.
It is composed of a fixed damper 21 fixedly installed in the intake cylinder 19a which is opened, and a rotary damper 22 of the same shape that is rotated in three stages by a rotary device 23, and the rotary damper 22 is It is supported concentrically on the outside of the fixed damper 21, and two main intake windows 24 are opened at symmetrical positions on the surface of the fixed damper 21, and the main intake windows 24 are opened at symmetrical positions on the surface of the rotary damper 22. Two sub-intake windows 25 smaller than the main intake window 24 are opened to face the window 24, and the rotation damper 2 is opened by the rotation device 23.
2 to the fixed damper 21 as shown in the fourth figure.
When rotated to the stage position, a fixed amount of combustion air suitable for steady vaporization combustion is drawn between the main intake window 24 and the auxiliary intake window 25 so that a fixed amount of combustion air suitable for steady vaporization combustion is taken into the ventilation chamber 2 through the intake port 19. The intake window 26 is operated to open, and the rotary damper 2 is operated as shown in FIG.
2 is rotated to the second stage position, a trace intake window 27 is opened between the main intake window 24 and the auxiliary intake window 25, and backfire combustion occurs from the flame chamber 4 in the gas chamber 8. As well as reducing the amount of air intake window 2
The unburned gas remaining in the gas chamber 8 is completely combusted with the combustion air taken in from the combustion air 7, and
When the rotary damper 22 is rotated to the third stage position as shown in the figure, an increasing intake window 28, which is larger than the fixed intake window 26, is opened between the main intake window 24 and the auxiliary intake window 25, and the gas chamber 8 The combustion gas after backfire combustion inside the combustion chamber is quickly discharged to the outside from the gas chamber 8 and the flame chamber 7 using increased combustion air.

Reference numeral 29 denotes a control device for automatically sequentially controlling the rotary damper 22 from the first stage position to the third stage position with respect to the fixed damper 21, and the control device 29 is connected to the oil pipe 15. When the fuel supply operation to the oil pipe 15 is stopped, the control device 29 is operated in response to a signal to automatically control the amount of combustion air blown as described above.

Reference numeral 30 denotes an ignition plug arranged so as to face the inside of the flame chamber 7 near the fuel splashing position.

31 is a combustion chamber of a household heater, water heater, or industrial dryer into which the vaporizing burner is inserted; 32 is an exhaust port of the combustion chamber 31; Even when the vaporizing burner is inserted into the large-area combustion chamber 31 and the burner is operated as described above, an increased amount of combustion air is blown at the end, so for example, when the vaporized fuel is stopped. Sometimes, even if unburned gas remains in the combustion chamber 31, the unburned gas is diluted with an increased amount of combustion air and quickly exhausted to the outside, so that the bad odor is dissipated to the surroundings for a long time. You can prevent this from happening.

The air volume adjusting device 20 for switching and blowing the combustion air from the first stage to the three stages at the same time as the supply of fuel is stopped is an embodiment device other than that described in FIGS. 2 and 3. It can be easily achieved even if the

That is, the air volume adjusting device 20' of the second embodiment shown in FIG. A damper 21' is fixed horizontally, and a rotation device 2 is installed inside the cylindrical fixed damper 21'.
A rotating damper 22' of substantially the same shape directly connected to the fixed damper 21' is rotatably fitted therein, and two main intake windows 24' are provided at positions symmetrical to the cylindrical wall of the fixed damper 21'. The main intake window 24' is located at a symmetrical position on the cylinder wall of the rotary damper 22' facing the main intake window 24'.
When two auxiliary intake windows 25' smaller than 4' are opened and the rotary damper 22' is rotated to the first stage position shown in FIG. Fixed intake window 2 between window 25'
6', and when the rotary damper 22' is rotated to the second stage position shown in FIG. 22' is rotated to the third stage position shown in Figure 10, the main intake window 24' and the sub-intake window 2
By opening the small amount intake windows 28' between the combustion chambers 5' and the combustion chambers 5', combustion air can be blown to accurately accomplish the three functions of vaporization combustion, flashback combustion, and discharge of combustion gas.

Effects of the Invention In short, the present invention has the above-mentioned technical means, so that even if the evaporated gas of fuel is mixed with combustion air and pressurized into the gas chamber 8, the fumes are injected into the flame chamber 7. Even if the burner is capable of vaporizing combustion, when extinguishing the vaporized fuel, the supply of fuel is stopped and the amount of combustion air blown into the gas chamber 8 is changed from the fixed amount during vaporizing combustion to the amount inside the gas chamber 8. After the residual unburned gas in the gas chamber 8 is combusted in the gas chamber 8 and the flame chamber 7 in a very instantaneous amount to the extent that backfire combustion occurs, the amount is immediately increased from the amount during vaporization combustion. It is easy to extinguish the combustion gas while expelling it to the outside from the gas chamber 8 and the eruption chamber 7. It is possible to reliably eliminate emissions, achieve clean vaporization combustion from start to finish, and perform efficient heating work in a good environment. A device for controlling the amount of air blown into a fixed amount state, a small amount state, and an increased amount state is provided in the oil feed pipe 15 inserted into the vaporization cylinder 9 and in the intake port 19 of the ventilation chamber 2, and in addition to the main and sub-intake. The air volume control device 20 consisting of two dampers 21 and 22 having windows 24 and 25 is connected to a control device 29, respectively, so that the control device 29 can stop the fuel supply to the oil pipe 15 and at the same time The windows 24 and 25 are automatically switched and adjusted so that they become a quantitative intake window 26, a trace intake window 27, and an increased intake window 28, thereby ensuring that unburned gas with a strong odor generated in the gas chamber 8 is removed. It has the effect of being able to burn it and remove it to the outside.

[Brief explanation of drawings]

The drawing shows an odor prevention device for extinguishing a fire in a vaporizing burner for carrying out the method of the present invention.
The figure is a partially cutaway front view, FIG. 2 is a side view of the fixed damper, FIG. 3 is a side view of the rotary damper, and FIGS. 4 to 6 are operating state diagrams of the air volume adjustment device. FIG. 4 is a side view with the quantitative intake window open, FIG. 5 is a side view with the minute intake window open, and FIG. 6 is a side view with the increasing intake window open. Figure 7 is a partially cutaway front view of a vaporizing burner equipped with another example of an air volume adjustment device;
Figures 1 to 10 are operating state diagrams of the air volume adjustment device according to the above, in which Figure 8 is a longitudinal side view with the quantitative intake window open, and Figure 9 is a vertical side view with the minute intake window open. FIG. 10 is a longitudinal side view with the increased intake window open. 1... Combustion tube, 2... Blow chamber, 7... Flame chamber,
8... Gas chamber, 9... Vaporizer tube, 15... Oil pipe,
19...Intake port, 20...Air volume adjustment device, 24...
...Main intake window, 25... Sub-intake window, 26... Fixed intake window, 27... Trace intake window, 28... Increased intake window, 29... Control device.

Claims (1)

[Scope of Claims] 1. In a device in which evaporated gas of fuel is mixed with combustion air and injected into a gas chamber under pressure, and then atomized into a flame chamber to cause vaporization combustion, when the vaporization combustion is extinguished, At the same time as the supply of fuel is stopped, the amount of combustion air blown into the gas chamber is instantly changed from the constant amount during vaporization combustion to a very small amount to the extent that flashback combustion occurs in the gas chamber to reduce residual unburned gas in the gas chamber. After being combusted in a gas chamber and a flame chamber, the combustion gas is immediately controlled to increase in quantity from the amount during vaporization combustion, and the combustion gas is extinguished while being discharged from the gas chamber and the flame chamber. Method for preventing bad odors when extinguishing a burner. 2. In a combustion cylinder provided with a gas chamber on the inner periphery, a vaporization cylinder communicating with the gas chamber is rotatably disposed, and on one side of the combustion cylinder, combustion air is passed through the vaporization cylinder and into the gas chamber. For those equipped with a ventilation chamber that can blow air,
An oil feed pipe inserted into the vaporization cylinder and an air volume adjustment device consisting of two dampers disposed at the intake port of the ventilation chamber and having main and sub intake windows are respectively connected to a control device, At the same time as the fuel supply to the oil pipe is stopped, the control device changes the main and auxiliary intake windows from a quantitative intake window during vaporization combustion to a minute intake window during flashback combustion, and then to an increased intake window during combustion gas discharge. A device for preventing bad odors when extinguishing a fire in a vaporizing burner, characterized by sequentially adjusting the openings. 3. The air volume adjustment device is characterized in that a fixed damper and a rotary damper are formed adjacent to each other, and the main intake window opened in the fixed damper is larger than the auxiliary intake window opened in the rotary damper. A device for preventing bad odor when extinguishing a fire in a vaporizing burner according to claim 2.