JPH033765Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention atomizes kerosene and other liquid fuels,
The present invention relates to a liquid fuel combustion device that performs vaporization combustion, and this liquid fuel combustion device is mainly used as a heat source for a grain dryer.

``Prior Art'' A liquid fuel combustion device that atomizes liquid fuel such as kerosene using a rotary cup that rotates at high speed, and then vaporizes and burns the atomized liquid fuel, which is used in a grain dryer, is known, for example, from the Utility Model Publication No. 58- As stated in Publication No. 23058 or Publication No. 58-23061,
It was publicly known before this application.

``Problems to be solved by the invention'' By the way, in the conventional liquid fuel combustion device described above, liquid fuel is injected or dripped onto the surface of a rotating cup that rotates at high speed, and the liquid fuel is atomized by centrifugal force. The combustion air is supplied into the combustion cylinder without directly blowing against the liquid fuel atomization surface of the rotating cup, so when the combustion amount is reduced, the combustion air is not directly blown onto the liquid fuel atomization surface of the rotating cup. There was a problem in that carbon and tar generated due to incomplete combustion were deposited and the atomization of the liquid fuel was impaired, resulting in poor combustion conditions.

In particular, it is a rotating cup that opens toward the tip,
For those configured to supply liquid fuel inside,
Very little combustion air flows through the rotating cup, and the above-mentioned drawbacks are significant.

Therefore, the present invention solves the problems of the conventional ones and creates a liquid fuel combustion device that can always maintain good combustion conditions without carbon or tar depositing on the rotating cup even when the combustion amount is reduced. The purpose is to provide the following.

"Means for Solving the Problems" The technical problem of the present invention is to achieve the above object, and the technical means thereof are configured as follows.

That is, a blower section is provided outside the base end of the combustion tube,
Furthermore, a rotary cup that opens toward the distal end is attached to the distal end of a hollow rotary shaft at the base end of the combustion cylinder, and this rotary cup is rotated at high speed, causing liquid to flow into the rotary cup from the opening at the distal end of the rotary shaft. supply fuel,
In a device that supplies combustion air from the outside of the rotary cup into the combustion cylinder to atomize liquid fuel and vaporize and burn it, a ventilation hole is provided on the base end surface of the rotary cup, and a ventilation hole is provided on the outer back surface of the rotary cup. A liquid fuel characterized in that a substantially symmetrical partition cup is integrally attached, and a combustion air chamber and a cooling air blowing chamber are respectively defined in the blower section by the partition cup and a partition wall arranged inside the blower section. This is a combustion device.

"Operation" The technical means of the present invention operates as follows (see drawings).

To bring the liquid fuel combustion device into a combustion state, the rotary cup 5 is rotated at high speed, combustion air and cooling air are supplied into the combustion tube 1, and the liquid fuel is passed through the hollow rotary shaft 4 from the opening at its tip to the rotary cup. Supply to the inside of 5. Rotate cup 5
The liquid fuel supplied to the inside of the combustion tube 1 is scattered toward the inner peripheral surface of the combustion tube 1 by centrifugal force and is atomized. Therefore, when it is ignited, a combustion flame is generated in the combustion tube 1, and thereafter the atomized liquid fuel is vaporized by the combustion flame, and the vaporized combustion state continues.

By the way, since cooling air is constantly flowing into the inside of the rotary cup 5 from the ventilation chamber 14 through the ventilation port 8 on the base end surface, carbon and other substances are generated inside the rotary cup 5 by the blowing action of the cooling air. This prevents tar from accumulating and maintains good combustion conditions. Furthermore, since the rotating cup 5 and its rotating shaft 4 are subjected to cooling action, they will not deteriorate due to burning over a long period of time.

"Embodiment" A preferred embodiment of the present invention will be described with reference to the drawings.

In the drawing, reference numeral 1 denotes a combustion tube with an open tip, and an electric motor 3 is attached to the outer side of the base end of the combustion tube 1 via a blower section 2, and the base end is opened toward the tip. A rotating cup 5 is attached. The rotating shaft 4 has a hollow shape, and a diffusion plate 6 is attached to the tip thereof. Liquid fuel is ejected from the tip opening 7 of the rotary shaft 4 between the back surface of the diffusion plate 6 and the base end surface of the rotary cup 5. Further, a ventilation hole 8 is formed in the base end surface of the rotary cup 5, and a flat portion 9 is formed at the periphery of the distal end of the rotary cup 5, which extends toward the inner wall of the combustion tube 1. 10 is a fuel scattering prevention wall formed on the inner wall of the combustion cylinder 1.

A substantially symmetrical partition cup 11 is integrally attached to the outer back surface of the rotary cup 5.
Inside the blowing section 2, a combustion air blowing chamber 13 and a cooling air blowing chamber 14 are formed by the partition cup 11 and the partition wall 12. The ventilation chamber 13 communicates with the ventilation port 15 of the combustion tube 1 along the outside of the rotary cup 5, and the ventilation chamber 14 communicates with the inside of the rotary cup 5 through the ventilation port 8. A part of the combustion air blowing chamber 13 has a transparent wall 16
A flame detector 17 is arranged outside this transparent wall 16. Reference numeral 18 denotes a fuel supply port, which is connected to the base end side of the hollow rotating shaft 4. 19 is a combustion air supply port, and 20 is a cooling air supply port.

In the liquid fuel combustion apparatus configured as described above, if the electric motor 3 is started to rotate the rotary cup 5 at high speed and liquid fuel is supplied from the combustion air supply port 19 and the cooling air supply port 18, the liquid fuel is It is ejected from the tip opening 7 of the rotating shaft 4 into the rotating cup 5, and is scattered by centrifugal force toward the inner wall of the combustion tube 1, where it is atomized. The atomized liquid fuel is then mixed with combustion air blown into the combustion tube 1. So, if you ignite this, combustion tube 1
A combustion flame is generated inside, and the fuel, which is then atomized, vaporizes and becomes a mixed gas, and vaporization combustion continues. The flat part 9 at the tip of the rotary cup 5 promotes the scattering of atomized fuel toward the inner wall of the combustion tube, so that air-fuel mixture is generated intensively at the base end of the combustion tube 1, improving combustion efficiency. becomes extremely high. In addition, cooling air is constantly blown into the inside of the rotary cup 5 from the ventilation port 8 on its base end surface, and is also blown in one direction along with the fuel by the diffusion plate 6, so even when the combustion amount is reduced, Carbon and tar are not deposited on the inner surface of the rotary cup 5, and good combustion conditions can be maintained for a long period of time.

``Effect of the invention'' In short, the present invention has the technical means and works as described above, so even if liquid fuel is supplied into the rotating cup from the opening at the tip of the rotating shaft and the liquid fuel is supplied to the outside of the rotating cup, Even when the combustion air in the combustion cylinder is supplied from the ventilation chamber to atomize and vaporize the liquid fuel, there is a ventilation chamber inside the rotary cup that is separated from the combustion air ventilation chamber. Since the blown cooling air is constantly jetted out from the ventilation opening, the liquid fuel supplied inside the rotating cup can be diffused into finer particles by the jetting action of the cooling air, promoting complete combustion. As a result, carbon and tar due to incomplete combustion do not adhere to and accumulate on the inner surface of the rotary cup, and a good combustion state can always be maintained.

[Brief explanation of the drawing]

The drawings show an embodiment of the liquid fuel combustion apparatus according to the present invention, in which FIG. 1 is a partially cutaway side view, and FIG. 2 is a front view of the same. 1... Combustion tube, 4... Hollow rotating shaft, 5...
Rotating cup, 7... End opening of rotating shaft 4, 8...
Ventilation opening, 11... partition cup, 12... partition wall,
13... Combustion air blowing chamber, 14... Cooling air blowing chamber, 18... Fuel supply port.

Claims (1)

[Scope of utility model registration request] A ventilation section is provided on the outside of the base end of the combustion tube, and a rotary cup that opens toward the distal end and is attached to the tip of a hollow rotating shaft is provided at the base end inside the combustion tube, and this rotary cup is rotated at high speed. , which supplies liquid fuel into the rotating cup from the opening at the tip of the rotating shaft, and supplies combustion air from the outside of the rotating cup into the combustion cylinder to atomize the liquid fuel and vaporize and burn it,
In addition to opening a ventilation hole in the base end surface of the rotary cup, a substantially symmetrical partition cup is integrally attached to the outer back surface of the rotary cup, and air is blown by this partition cup and a partition wall provided in the ventilation section. 1. A liquid fuel combustion device characterized in that combustion air and cooling air blowing chambers are respectively formed within the unit.