JPS6021617Y2 - rotary gasification burner - Google Patents

Description

[Detailed description of the invention] The present invention is a rotary gasification burner, in particular, a liquid fuel is supplied to a spray body rotatably supported at the center opening of the inner bottom wall of the burner outer cylinder, and is dispersed outward in the form of particles. The vaporizer is then flowed down from the open end of the inner peripheral surface of the vaporizing cylinder, which is fixedly supported on the outer periphery, to the flange of the rotating body, and from the flange of the rotating body, it is scattered onto the inner peripheral surface of the burner outer cylinder and ignited. This relates to a type of rotary gasification burner that first causes main combustion (pilot combustion), and then gasifies and burns the gas in a vaporization cylinder.

In conventional rotary gasification burners that carry out vaporization combustion after main combustion, the vaporization cylinder is generally of a rotating type, but in this system, thermal distortion of the vaporization cylinder itself causes imbalance of the rotating body of the vaporization cylinder itself. There have been problems such as interference between the rotating body and the fixed part, and leakage of vaporized gas from the gap between the rotating body and the fixed part.

In addition, in a completely different method from the conventional one, the vaporization cylinder is fixed, and the liquid fuel in the vaporization cylinder is gasified using an electric heater heating method to perform vaporization combustion from the beginning, but in this case, the temperature of the vaporization surface is kept constant. There were various problems such as the complexity of the control required to achieve this, the waiting time for heating the heater (3 to 5 minutes), the lack of quick heating performance, and the high running cost.

Therefore, in view of the above-mentioned drawbacks of the conventional burner, the present invention has been improved by making the vaporization cylinder a fixed type, and rotating a rotating body equipped with a spray body that injects liquid fuel in the form of fine particles into the vaporization cylinder. Provided is a rotary gasification burner, in which a part of the rotating body is formed with a blade having a blowing function, and the blowing blade is positioned on the primary side of a gas chamber formed between the vaporizing cylinder and the rotating body. This is what I am trying to do.

The structure of the present invention will be explained below according to the embodiments shown in the drawings.

In FIG. 1, 1 is a burner outer cylinder having a combustion chamber 2;
3 is a motor casing attached to the inner bottom wall surface 4 side of the burner outer cylinder 1.

A motor 5 is fixedly supported within the motor casing 3, and forms an air supply chamber 6 between the motor 5 and the inner peripheral surface of the casing.

7 is an air intake port of the casing 3, and 8 is a combustion fan attached to the rotating shaft 9 of the motor 5.

A rotary body 11 attached to a motor rotating shaft 9 is rotatably supported in a central opening 10 of the inner bottom wall surface of the burner outer cylinder of the combustion chamber 2 .

This rotating body 11 has a tapered diffuser 12 directly attached to the rotating shaft 9, and is fitted onto the outer periphery of the diffuser 12 with a predetermined gap, and has a large number of small holes 13 on the circumferential side. A cylindrical spray body 14, and a flange 15 and a cylindrical portion 16 fitted on the outer periphery of the end of the spray body 14 for scattering liquid fuel on the outer periphery, and a side portion 18b of the spray body 14.
and a rotary member 18 provided with a large number of air blowing blades 17 formed by cutting and raising a portion of the radial portion 18a between the flange 15 and the rotary member 18.

The rotating member 18 is arranged with a predetermined gap from the inner bottom wall surface 4 of the burner outer cylinder, and the blowing blade 17 is connected to the vaporizing cylinder 20 which will be described later.
It is arranged so as to straddle the open end 23 of.

Reference numeral 19 denotes a net-like member held between the diffuser 12 and the spray body 14.

On the other hand, a cylindrical vaporizer cylinder 20 is arranged at a predetermined gap around the outer periphery of the atomizer 14 in the combustion chamber 2 so as to cover it, and is fixedly supported by the burner outer cylinder 1 via brackets 21 at several points on the outer periphery. ing.

As a result, a gas chamber 22 is formed between the vaporization cylinder 20 and the spray body 14.

The diameter of the vaporizing tube 20 increases toward an open end 23 on the rotating member 18 side, and this open end 23 faces the flange 15 and the cylindrical portion 16 side of the rotating body 11.

A gas passage 25 is formed on the other open end 24 side, and a flame ejector 27 having a large number of slit-shaped flame ports 26 is attached.

20a is a vaporizing cylinder 2 extended to a position facing the flame port 26
The cylindrical extension part 0, 28 and 29 are the vaporizing cylinder 20 and the flame body 2.
This is a wind direction plate sandwiched between the

In the figure, 30 is an oil pipe that supplies fuel to the diffuser 12, and 31 is a flange 1 of the rotating body 11 on the inner peripheral surface of the burner outer cylinder.
5, an ignition ring 32 is attached to the inner bottom wall surface 4 of the burner outer cylinder, a spark plug 33 and 34 are located close to the ignition ring 31, and 33 and 34 are connected to the inner peripheral surface 35 of the flame port 26. Cylindrical portion 16 and flange 1 of rotating member 18
This is a net-like member arranged at 5.

Next, the operating sequence of the rotary gasification burner configured as above will be explained.

First, the motor 5 is started, and the combustion fan 8 and rotating body 1 are started.
Rotate 1.

Air is introduced into the air supply chamber 6 from the air suction lower by the rotation of the combustion fan 8, and is further introduced into the air supply chamber 6 by the rotating body 11.
The air is forcibly sent to the gas chamber 22 and to the outer peripheral flange 15 side of the rotating member 18 by the blowing action of the air blowing blade 17 provided on the rotating member 18 .

The air sent to the gas chamber 22 is sent from the gas chamber 22 to the combustion chamber 2 through the gas passage 25, the gap between the wind direction plates 29 and 28, and the air particle path a that communicates with the flame port 26, and then the flange 15. The air sent to the side passes through the flange 15 and the wind direction plate 1 attached to the flange 15 with a predetermined gap.
The air is sent to the ignition ring 31 side through the air flow path between the ignition ring 8c and the ignition ring 31.

Note that a part of the air in the air supply chamber 6 flows through the air flow path C between the rotating member 18 and the inner bottom wall surface 4 of the burner outer cylinder 1.
and is sent to the ignition ring 31 side.

When liquid fuel is supplied to the surface of the diffuser 12 after a predetermined period of time has elapsed since the start of the motor 5, the liquid fuel sequentially spreads over the surface of the diffuser 12 due to the centrifugal force caused by the rotation of the diffuser 12 and the jetting action of air. It diffuses and migrates, passing through the net-like member 19 and reaching the inner circumferential surface of the spray body 14 .

The centrifugal force caused by the rotation of the atomizer 14 causes the atomizer to be scattered in the form of fine particles from a large number of small holes 13 formed on the circumferential surface of the atomizer to the vaporization surface 36 of the vaporizer cylinder 20 .

The fuel supplied to the vaporization surface 36 in this way begins to flow down toward the open end 23 side along the slope of the vaporization surface 36, and the rotating member 18 due to the jet action of the air flowing through the air flow path.
It is caused to fall and scatter into the cylindrical part 16.

Subsequently, the liquid fuel is moved to the flange 15 by the centrifugal force caused by the rotation of the rotating member 18 and the jetting effect by the air in the flow path.
The spray from the burner outer cylinder 1 is scattered from the outer peripheral edge of the flange 15.

In this state, when the spark plug 32 is placed in the oil chamber and a spark is caused between the ignition ring 31 and the ignition ring 31, the fuel supplied to the inner circumferential surface of the burner outer cylinder is ignited, and the air flowing through the air flow path and C ignites the fuel. Live combustion (pilot combustion) begins.

Then, the vaporization tube 20 is heated by the heat generated by this raw combustion, and the liquid fuel on the vaporization surface 36 that flows in a thin film starts to gradually evaporate and gasify.

The gasified fuel mixes with the air in the air passage a flowing through the gas chamber 22, becomes a mixed gas, passes from the gas passage 25 between the wind direction plates 19 and 28, and enters the combustion space of the combustion chamber 2 through the flame port 26. Injected.

Then, it is ignited by the raw combustion flame and starts vaporization combustion.

After the vaporization combustion flame is formed, this vaporization combustion flame immediately heats the cylindrical extension part 20a of the vaporization tube 20, and is transferred to the vaporization surface 38 by heat conduction (heat back), where it is kept at the vaporization temperature and then heated. Activate the gasification of liquid fuel.

In other words, a full operating state is obtained.

In this full operating state, the entire amount of liquid fuel flowing through the vaporization surface 36 evaporates into gas, and raw combustion disappears.

As is clear from the above description, in the rotary gasification burner of the present invention, the blowing blade 17 is located on the primary side of the gas chamber 22, and during the vaporization combustion,
The flow direction of the evaporated and gasified fuel is regulated by the air flowing through the air flow path a, so that it does not leak out from the gap between the vaporizer cylinder (fixed part) and the rotating body 11 as in the conventional case.

Furthermore, the rotating body 11 is configured such that the thermal influence due to vaporization combustion is blocked by the air flowing through the vaporization tube 20 and the flow paths a, b, and c, so that there is no loss of balance due to thermal distortion or interference with fixed parts.

FIG. 2 shows another embodiment in which the present invention is applied to a type of rotary gasification burner in which the position of the diffuser 12 is different.

In this embodiment, the spray body 14 has a cylindrical shape with a bottom, and the diffuser 12 is attached to the bottom wall 14a of the spray body 14, and a diffuser 12 is attached to the connection portion between the spray body 14 and the rotating member 18, so that the spray body 14 is forcibly sent to the gas chamber 22. A donut-shaped wind direction plate 37 is attached to regulate the flow direction of the air passing through.

In addition, the inner diameter of the attached end of the wind direction plate 37 is made smaller than the inner diameter of the open end 14b of the spray body 14 to form a liquid fuel outflow prevention part 37b, so that the fuel flows through the small holes 13 of the spray body 14.
This is done so that it is completely dispersed.

Since the other configurations and effects are the same as those of the previous embodiment, their explanations will be omitted here.

As explained above, in the present invention, the liquid fuel scattered on the vaporization surface 36 of the vaporization cylinder 20 is caused to flow down to the rotating body.
The raw combustion flame is supplied to the cylindrical portion 16 of the rotating member 18 constituting the rotary member 1, and scattered from the flange 15 on the outer peripheral edge to the inner circumferential surface of the burner outer cylinder to perform live combustion (pilot combustion). The liquid fuel on the vaporization surface 36 is evaporated and gasified by heating, and the liquid fuel on the vaporization surface 36 is evaporated and burned.The vaporization surface 36 can be quickly maintained at the vaporization temperature, and has excellent heating speed.

Furthermore, compared to conventional heater control methods, there is no complexity in controlling the vaporization temperature to keep it constant.

Furthermore, the rotating body 11 is configured so that the influence of heat due to vaporization combustion is blocked by the air flowing through the vaporization cylinder 20 and the flow paths a, b, and c, so that there is no loss of balance due to thermal distortion or interference with fixed parts.

Furthermore, since the blowing blades 17 formed in the radial direction portion 18a of the rotating member 18 of the rotating body 11 are positioned astride the open end 23 of the vaporizing tube 20, air can easily pass in the axial direction, and the air for ecological combustion (flowing Since the air for vaporization and combustion is supplied from the primary side of the gas chamber 22,
Gas does not leak out from the gap between the vaporizer cylinder 20 and the rotating body 11.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the rotary gasification burner of the present invention, and FIG. 2 is a sectional view showing another embodiment. DESCRIPTION OF SYMBOLS 1... Burner outer cylinder, 10... Center opening, 15... Flange, 14... Spray body, 11... Rotating body , 22... gas chamber, 20... vaporizer cylinder, 26... flame port,
27...Flame body, 17...Blower blade.

Claims (1)

[Scope of utility model registration request] It is rotatably supported in the center opening 10 of the inner bottom wall surface of the burner outer cylinder 1, has a flange 15 on the outer peripheral edge for scattering liquid fuel onto the inner peripheral surface of the burner outer cylinder 1, and has a flange 15 in the center thereof. A cylindrical spray body 14 for scattering the liquid to the outside.
a rotating body 11 having a rotating body 11; a vaporizing cylinder 20 that is fixedly supported by the burner outer cylinder 1 and covers the atomizing body 14 and forms a gas chamber 22 between the atomizing body 14; and a vaporizing cylinder 20 that is attached to the tip of the vaporizing cylinder 20. The opening end of the vaporizing cylinder 20 is arranged in the radial region 18a between the spray body 14 side of the rotating body 11 and the flange 15. A rotary gasification burner characterized by having a blower blade 17 spanning 23.