JPH0215768B2 - - Google Patents

Description

Detailed Description of the Invention The present invention completely burns liquid fuel even in a narrow gas generating body to preheat the gas generating body, and then evaporates and vaporizes the liquid fuel supplied together with combustion air into the gas generating body. The present invention relates to a method for starting combustion in a vaporizing burner that allows effective vaporizing combustion to be continued for a long period of time while producing mixed gas.

As described in Japanese Patent Application Laid-open No. 55-77617 and Japanese Patent Application Laid-open No. 57-73308, the present applicant produced gas by live combustion of liquid fuel supplied together with combustion air into a narrow gas generator. The generator is preheated, and the liquid fuel supplied together with the combustion air into the gas generator is converted into a mixed gas by the above preheating, and the generated mixed gas is directed toward the gas generator to be vaporized and burned, and further preheated to cause vaporization and combustion. We have developed a vaporizing burner that continues to be used, and as it is put into practice, it has achieved considerable results.

By the way, regarding the above-mentioned known vaporizing burner,
Since the size of the gas generating body is approximately constant, the amount of combustion air blown or liquid fuel supplied is set from the beginning so that proper vaporization combustion can continue over a long period of time, and the amount cannot be adjusted. It was becoming like that.

Therefore, when starting vaporization combustion, in order to preheat the gas generating body, if an amount of liquid fuel suitable for continuing vaporizing combustion is live-combusted in a narrow gas generating body while supplementing combustion air. In this case, the amount of air for combustion is insufficient, and the liquid fuel is incompletely combusted, producing a lot of soot.The soot adheres to the entire inner circumferential surface of the gas generator, and the preheating effect of the gas generator is reduced. Of course, when liquid fuel is supplied into the gas generating body together with combustion air to generate mixed gas, good evaporation action is not promoted due to soot, and as a result, unevaporated There is a problem in that fuel remains in the gas generating body and stable vaporization combustion cannot be continued for a long period of time, and a solution to this problem has been strongly desired.

In view of the above, the present invention increases the amount of combustion air blown during raw combustion of liquid fuel in a narrow gas generating body than the amount of air blown during raw combustion of liquid fuel, or increases the amount of combustion air blown during raw combustion of liquid fuel. attempts to provide a method for starting combustion in a vaporizing burner that allows the liquid fuel to be completely combusted even in a narrow gas generating body by reducing the amount of liquid fuel supplied compared to the amount supplied during vaporization combustion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a vaporizing burner using the method of the present invention will now be described with reference to preferred embodiments shown in the accompanying drawings.

The vaporizing burner shown in Figures 1 to 3 is designed to achieve complete combustion of liquid fuel by adjusting the amount of combustion air blown during live combustion to be greater than the amount of combustion air during vaporizing combustion. In this embodiment of the first invention, reference numeral 1 denotes a hollow gas generating body having an oblong cylindrical shape as a whole, and a base end side of the gas generating body 1 is provided with combustion air inside the gas generating body 1. A blower 2 for blowing air toward the vehicle is installed under a communicating state.

Reference numerals 3 and 3 denote combustion bodies, and the combustion bodies 3 and 3 are formed entirely in a horizontally elongated cylindrical hollow shape, and are arranged in parallel on both sides of the gas generating body 1 on the same plane as the gas generating body 1; One end of the combustion bodies 3, 3 is closed to form a gas chamber 4, 4 inside thereof, and the other end is communicated with the front end side of the gas generating body 1 via a communication member 5. A large number of slit-shaped flame nozzles 6, 6... are opened on the upper half surface of the combustion bodies 3, 3 and the surface facing the gas generating body 1, and combustion in which the slit-shaped flame nozzles 6, 6... are not opened is performed. Flame cover plates 7 having bent and projecting edges at both ends are attached to the outer peripheral surfaces of the bodies 3, 3, respectively. This flame abutting plate 7 functions to direct and stabilize the combustion flame inward. The flame nozzles 6, 6, . . . of the combustion bodies 3, 3 may have a shape of a small circular hole or other suitable shape, in addition to the shape of a rod.

Inside the proximal end of the gas generating body 1 is an oil feed pipe 8 for stably spouting a certain amount of liquid fuel that can continue good vaporization and combustion over a long period of time.
faces the gas generating body 1 in a neutral position, and an oil injection port 9 is opened at the tip of the oil feed pipe 8 . 10 is a spark plug for live combustion.

The above-mentioned blower 2 changes the rotation speed by changing the winding resistance, and increases the rotation speed so that the amount of combustion air blown is increased during raw combustion compared to the amount of air blown during vaporization combustion. The switching board 11
When the contact point 12 of the normally rotating winding coil of the blower 2 is switched, a certain amount of combustion air corresponding to the amount of liquid fuel supplied into the gas generating body 1 is supplied to generate a good mixed gas. When the switching plate 11 is switched to the high-speed rotating wire-wound coil contact 13 of the blower 2, an excessive amount of combustion air is generated compared to the amount of liquid fuel supplied. The liquid fuel is completely combusted even in the narrow gas generating body 1 by blowing an increased amount of air into the body 1. Reference numeral 14 denotes a spark plug for vaporization combustion, the tip of which faces the vicinity of the flame nozzle 6.

The vaporizing burner shown in FIGS. 4 and 5 is
The amount of combustion air blown is kept constant during raw combustion and vaporization combustion, and the amount of liquid fuel supplied during raw combustion is adjusted to be smaller than that during vaporization combustion, so that the liquid fuel is fed into a narrow gas generator 1. This is an embodiment of the second invention in which complete combustion can be performed even in the interior of the vehicle,
Reference numeral 1' denotes a hollow gas generator having an oblong cylindrical shape as a whole, and on the base end side of the gas generator 1',
A blower 2' is installed in communication with the gas generator 1' to constantly blow a certain amount of combustion air.

Reference numeral 3' denotes a combustion body, and the combustion body 3' is formed as a hollow horizontally elongated cylinder as a whole, and is arranged vertically in parallel directly below the gas generating body 1' along the same direction; One end of the combustion body 3 is closed to form a gas chamber 4' inside, and the other end is communicated with the distal end side of the gas generating body 1' via a communication member 5'. A large number of flame nozzles 6', 6'... are opened on both left and right sides of the combustion body 3', and these flame nozzles 6'
On the outer peripheral surface of the combustion body 3' which is not open, flame abutment plates 7', 7' having bent and projecting edges at both ends are attached. Even if the amount of combustion air blown into the base end side of the gas generating body 1' is always constant, the amount of combustion air that can be supplied to the gas generating body 1' at any time to accurately perform raw combustion or vaporized combustion of liquid fuel is constantly supplied to the gas generating body 1'. An oil feed pipe 8' that can spray oil into the gas is centrally faced toward the gas generating body 1', and an oil injection port 9' is opened at the tip of the oil feed pipe 8'. . 1
0' is a spark plug for live combustion.

The base end side of the oil feed pipe 8' mentioned above is divided into a main oil feed pipe 11' and a sub oil feed pipe 12', and these main and sub oil feed pipes 11' and 12' become one oil feed pipe again and are connected to the fuel pump 13. ', and is connected to the above sub-oil pipe 1.
A solenoid valve 14' is provided in the middle of the fuel pipe 2', and during live combustion, the solenoid valve 14' is closed and a small amount of liquid fuel, which is smaller than that during vaporization combustion, is transferred to the oil pipe 8 using only the main oil pipe 11'. ′ to ensure proper live combustion, and once the gas generating body 1′ is preheated by combustion,
The raw combustion is temporarily interrupted and the liquid fuel is transferred to the main oil pipe 11'.
The auxiliary oil feed pipe 12' allows a larger amount of oil to be fed than during raw combustion, thereby allowing vaporization combustion to be carried out in an appropriate state.

Reference numeral 15' denotes a spark plug for vaporization combustion, which is disposed so that its tip faces near the flame nozzle 6'.

Next, the operation of the present invention will be explained.

Now, even in a narrow gas generating body 1 by the vaporizing burner of the first invention shown in FIGS. 1 to 3,
After completely burning the liquid fuel and preheating the gas generator 1, if you want to continue good vaporization combustion, first switch the switching plate 11 to the high-speed rotating wire-wound coil contact 13 and operate the blower 2. A larger amount of combustion air is supplied into the gas generator 1 than the amount of air blown during vaporization combustion. Therefore, if a certain amount of liquid fuel is supplied from the oil feed pipe 8 and dispersed in fine particles through the oil injection port 9, and simultaneously ignited by the ignition plug 10,
The spattered atomized fuel is completely combusted even within the narrow gas generating body 1 due to the replenishing effect of excessively blown combustion air, and the raw combustion flame burns not only the gas generating body 1 but also the combustion body. Steps 3 and 3 are also preheated to a temperature sufficient to vaporize the fuel. When the entire gas generating body 1 is heated to a predetermined temperature in this way, the continuation of the raw combustion is temporarily interrupted, and then the switch 12 is switched to the steadily rotating wire-wound coil contact 12 side, and the amount of air blown during raw combustion is If a smaller amount of combustion air is blown into the gas generating body 1 from the blower 2, and a certain amount of liquid fuel is sprayed and supplied from the oil feed pipe 18 through the oil injection port 9, the sprayed liquid fuel is quickly evaporated and vaporized by the preheating effect while being blown by the combustion air in the direction of the arrow in the gas generator 1, and the generated vaporized gas mixes with the combustion air and flows into the gas chambers 4, 4. After the gas is filled and becomes a suitable mixture, it is vigorously emitted from the numerous flame nozzles 6, 6, and the ignition plug 10
is ignited to emit a vaporizing combustion flame toward the gas generating body 1, thereby preheating the gas generating body 1 from the outside. As a result, a constant amount of mixed gas is continuously generated while the liquid fuel is being supplied together with the combustion air, and good vaporization and combustion can be continued.

In the case of the second invention, in which it is desired to complete raw combustion and continue good vaporization combustion by simply adjusting the amount of liquid fuel fed without changing the amount of air blown,
As shown in FIG. 4, a certain amount of combustion air is blown into the gas generating body 1' by the blower 2', and at the same time, the sub-oil pipe 12' is cut off by the solenoid valve 14.
The fuel pump 13' supplies liquid fuel to the main oil pipe 1.
If the oil is supplied to the oil pipe 8' only through 1', the supplied amount will be sprayed in the form of fine particles from the jet port 9' under a condition that is smaller than that during vaporization combustion, and the liquid fuel will be ignited. Fully fueled under excess air condition,
The gas generating body 1' and the combustion body 3' are preheated. After both the gas generating body 1' and the combustion body 3 are preheated to an appropriate vaporizing atmosphere temperature in this manner, the live combustion of the liquid fuel is temporarily interrupted. Next, solenoid valve 1
4' is opened, the liquid fuel supplied from the fuel pump 13' is sent to the oil supply pipe 8' via the main and auxiliary oil supply pipes 11' and 12', and is sprayed into the gas generating body 1' from the oil injection port 9'. At the same time, the blower 2' is operated to blow a certain amount of combustion air into the gas generator 1'. Then, the supplied liquid fuel will be increased in amount compared to the raw fuel supply, and will quickly evaporate and vaporize due to the preheating effect while being injected into the gas generator 1' in the direction of the arrow by the combustion air. The generated vaporized gas mixes with combustion air, fills the gas chamber 4', becomes a complete mixed gas, blows out from a large number of flame nozzles 6', and is vaporized and combusted by ignition. This preheats the gas generating body 1' by the vaporizing combustion flame. Therefore, from then on,
Since the liquid fuel supplied into the gas generating body 1' becomes a mixed gas due to the preheating action of the gas generating body 1', good and stable vaporization combustion can be continued for a long period of time.

In short, the present invention reduces the amount of combustion air sent or the amount of liquid fuel supplied during live combustion of liquid fuel.
The amount of air blown during vaporization combustion is increased, or the amount of air is decreased compared to the amount of liquid fuel supplied, and even if the liquid fuel is sprayed with combustion air into a small gas generating body, it can be live-combusted to generate a gas generating body. The liquid fuel that has been preheated and subsequently supplied into the gas generator together with combustion air is turned into a mixed gas by the preheating effect,
Even with a vaporization burner that can vaporize and burn the generated mixed gas toward the gas generating body, further preheat it, and continue vaporization and combustion, it is possible to completely burn the liquid fuel in a narrow gas generation chamber. Not only can it prevent soot from adhering to the inside of the gas generator due to incomplete raw combustion due to a lack of combustion air, significantly reducing the preheating effect, but it can also promote the generation of vaporized gas during vaporization combustion. Therefore, it is possible to easily start the vaporization combustion at a constant rate.

[Brief explanation of drawings]

The drawings show an embodiment of a vaporizing burner using the method of the present invention, and FIGS. 1 to 3 show the case of the first invention in which the amount of air blown can be increased and adjusted.
Figure 1 is a front view of the raw combustion state with the main parts broken.
FIG. 2 is a plan view in a vaporized combustion state with main parts cut away, and FIG. 3 is a longitudinal sectional side view taken along the line A--A in FIG. Figures 4 and 5 show a vaporizing burner according to the second invention in which the amount of oil fed can be adjusted to reduce the amount of oil fed. FIG. 1,1'...Gas generator.

Claims (1)

[Claims] 1. Preheating the gas generating body by live combustion of liquid fuel sprayed together with combustion air in a narrow gas generating body,
Thereafter, the liquid fuel sprayed together with the combustion air into the gas generator is converted into a mixed gas inside the gas generator by the above-mentioned preheating effect, and the generated mixed gas is vaporized and burned toward the gas generator, further preheating the gas generator. In those designed to continue vaporization combustion,
The vaporization method is characterized in that during raw combustion of the liquid fuel, the amount of combustion air blown is increased compared to the amount of air blown during vaporization combustion, so that the liquid fuel can be completely combusted even in a narrow gas generating body. How to start combustion in a burner. 2 Preheat the gas generator by live combustion of the liquid fuel sprayed with combustion air inside the narrow gas generator,
Thereafter, the liquid fuel sprayed together with the combustion air into the gas generator is converted into a mixed gas inside the gas generator by the above-mentioned preheating effect, and the generated mixed gas is vaporized and burned toward the gas generator, further preheating the gas generator. In those designed to continue vaporization combustion,
A vaporizing burner characterized in that during raw combustion of the liquid fuel, the amount of liquid fuel supplied is reduced compared to the amount of liquid fuel supplied during vaporization combustion, so that the liquid fuel can be completely combusted even in a narrow gas generating body. How to start combustion.