JPS5833371Y2 - High speed bright flame liquid fuel burner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a high-speed luminous flame liquid fuel burner configured to vaporize and burn even high-boiling point liquid fuel.

Conventional liquid combustion burners include those in which the liquid combustion is atomized and combusted at the tip of the burner, and those in which the burnt fuel is gasified in a vaporizer and then guided to the burner for combustion. The former had the disadvantage of poor mixing with air, causing incomplete combustion, and the latter had the disadvantage of requiring a preheating device and a vaporizer separate from the burner.

On the other hand, the type with vaporization inside the burner was designated as
However, this has the drawback that it cannot be used unless it is a low-boiling point liquid fuel such as kerosene or liquefied gas, and it cannot be used as intended unless the amount of fuel and air supplied to the burner is very delicately controlled. The drawback is that high combustion efficiency cannot be obtained.

The present invention aims to provide a high-speed bright flame liquid fuel burner that eliminates the above-mentioned drawbacks, and one embodiment thereof will be described below with reference to the drawings.

The burner main body 1, which is approximately cylindrical, has a burner outer cylinder 2 and a combustion cylinder 3 that are screwed together at approximately the center.
A combustion air supply port 6 formed in a part of the burner outer cylinder 2 is a fuel supply base lid that is fixed to the base end of the burner outer cylinder 2 by screws 7 and closes it.

The tip 8 of the combustion tube 3 is narrowed to a slightly smaller diameter.

Reference numeral 9 denotes a substantially cylindrical mixing tube arranged concentrically in the burner body 1, and an annular air supply passage 10 communicating with the combustion air supply port 5 is provided between the inner wall of the burner body 1 and the inner wall of the burner body 1. One end 11 thereof is screwed into the inside of the fuel supply base cover 6 so as to be formed, and a flange 12 formed around the outer periphery of the other tip is loosely fitted onto the inner wall of the combustion cylinder 3.

The mixing tube 9 has a plurality of tangentially inclined air nozzles 13 a , 13 b , and 13 C formed on its peripheral body, and compressed air from the air supply path 10 flows into the mixing tube 9 in a high-speed spiral from each air nozzle. Blows out like an air stream.

Further, an air nozzle 14 is provided in a flange 12 on the outer periphery of the tip of the mixing tube 9, and air in the air supply path 10 is blown out from the air nozzle 14 toward the tip of the burner body 1.

15 is a gas pilot burner provided in the center of the fuel supply base cover 6 in order to form a pilot frame 16 at the rear end of the mixing pipe 9; 17 is also used to inject liquid fuel into the mixing pipe 9 in the form of a mist. In order to prevent the liquid fuel in the liquid fuel injection nozzle from being carbonized by the heat of the gas pilot burner 15, the liquid fuel injection nozzle 18 provided therein introduces air in the air supply path 10 to cool it. This is a cooling air introduction hole designed to provide cooling air.

Note that 19 indicates a thermocouple for detecting ignition of the gas pilot burner 150.

In the liquid fuel burner configured in this way, when the gas pilot burner 15 is now ignited, a pilot flame 16 is formed in the mixing tube 9 and the mixing tube 9 is heated.

In this state, when the liquid fuel is injected in a mist form from the liquid fuel injection nozzle 17 and combustion air is simultaneously supplied from the air supply port 5, this atomized liquid fuel is transferred to the pilot flame 16.
is vaporized by the heat of the air nozzle 13a of the mixing tube 9,
Reductive combustion occurs while mixing with the air blown out from 13 b and 13 C in the form of a high-speed spiral air flow, and the mixture is guided toward the tip of the mixing tube 9 .

Subsequently, air blown out from an air nozzle 14 provided on the outer periphery of the tip of the mixing tube 9 mixes with this to cause complete combustion, and a high-temperature combustion flame is blown out from the tip of the combustion tube 3 at high speed.

Note that if the mixing tube 9 is heated to a certain temperature or higher, the combustion will continue even if the pilot flame 16 is turned off.

As explained in the above embodiments, the present invention sprays fuel into the pilot flame of the gas pilot burner at the start of combustion to vaporize and burn it, and then burns it incandescently, so there is no need to separately provide a vaporizer or preheating device. Even with high-boiling point liquid fuels such as heavy oil, the vaporized fuel mixes well with air based on the high-speed spiral airflow that is blown into the mixing tube, and is guided toward the tip while undergoing reductive combustion, resulting in a high-temperature, high-speed bright flame coming from the tip. gush.

Then, a plurality of air nozzles are installed on the circumferential body of the mixing tube so as to be inclined in the tangential direction, and the vaporized fuel or its reduction combustion flame is enveloped by the high-speed spiral airflow, floating from the inner wall of the mixing tube and directed toward the tip. It has various features such as no adhesion or accumulation of carbide on the inner wall of the mixing tube because it is guided.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a longitudinal sectional view and FIG. 2 being a sectional view taken along the line X--X. DESCRIPTION OF SYMBOLS 1... Burner main body, 5... Combustion air supply port, 9... Mixing pipe, 10... Air supply path, 13 a, 13 b, 13 C... Air nozzle, 14... Air nozzle, 15...
...Gas pilot burner, 16...Pilot frame, 17...Liquid fuel injection nozzle.

Claims (1)

[Scope of utility model registration request] A generally cylindrical burner body, a mixing tube disposed concentrically within the burner body to form an annular air supply passage between the burner body and an inner wall of the burner body, and a rear part of the mixing tube. a gas pilot burner forming a pilot frame at the end;
The mixing tube includes a liquid fuel injection nozzle that injects liquid fuel in the form of a mist into the mixing tube from the rear end, and the mixing tube has a plurality of air nozzles that are tangentially inclined in the circumferential body of the mixing tube to inject the atomized burnt fuel into the mixing tube. is mixed with the air blown out from the air nozzle in a high-speed spiral flow to cause reductive combustion, and then mixed with air blown out from the air nozzle provided on the outer periphery of the tip of the mixing tube for complete combustion. A high-speed bright flame liquid fuel burner characterized by being configured to emit a high-speed, high-temperature flame.