JPH09112843A - Burner for crematino furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a burner for a cremation furnace contriving to shorten the burning time and having the excellent flame stability and the small influence to a furnace body. SOLUTION: The burner for a cremation furnace comprises a burner head 3 inserted into a burning tube 2 mounted at the end of a burner outer tube 1, a main burner port 4 formed at the center of the head 3, a pilot burner port 5 formed at the periphery of the port 4, an inner tube 7 inserted up to the midway in the tube 1, thereby supplying as into the tube 7, premixing the gas with the air in the tube 1 and injecting it from the ports 4 and 5. The burner further comprises a high-pressure air jet tube 8 inserted into the tube 7 and opposed at its end to the port 4, an ignition plug 9 inserted into the tube 8 and having an electrode 10 provided at the end and opposed to the end of the tube 8, and a straightening plate 11 inserted to the upstream side of the head 3, thereby straightening the mixture gas. The tube 1 is mounted forwardly movably in the direction in the furnace.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner used by being attached to a cremation furnace.

[0002]

2. Description of the Related Art A cremation furnace burner is required to meet the following requirements in order to burn in the shortest time. a. The flame is a long flame. b. The flame has a certain degree of unity (sharpness). c. There must be jet pressure. d. The width of combustion is large (throttle is tight). e. High flame stability (holding capacity). f. Strong against excessive air combustion. g. Must have a combustion capacity of 400,000 to 500,000 kcal / h. Conventionally, the burner shown in FIG. 7 has been known as a device that satisfies such requirements. This burner is a burner outer tube 10
Insert the inner pipe 101 to the middle of the inside of 0, and burner outer pipe 1
Combustion tube 102 at the tip of 00 and burner head 1 in this
The burner has a flame outlet 10
This is a configuration in which the four sides can be controlled up and down. In the figure, 105 is a gas control valve, and 106 is an air control valve.

[0003]

However, the above-mentioned conventional burner for a cremation furnace has the following drawbacks. a. It is difficult for a high speed jet to form a straight flame. b. The ignition to the main burner is uncertain. c. Lifting occurs with high-speed flame. d. Since the flame spreads, it takes a long time to burn, which has a large effect on the furnace body.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems, and the constitution thereof is as follows. 1. A combustion tube is attached to the tip of the burner outer tube and a burner head is inserted into the combustion tube, a main flame hole is formed in the center of the burner head, and a pilot flame hole is formed around the main flame hole, Insert the inner tube from the back to the middle of the burner outer tube, and supply gas into the inner tube,
Combustion air is supplied from an air flow path formed by an inner pipe and a burner outer pipe, and gas and air are premixed in the outer burner pipe and ejected from the main flame holes and pilot flame holes. In the cremation burner,

A high-pressure air jet pipe is inserted into the inner pipe so that the tip of the high-pressure air jet pipe faces the main flame hole. An ignition plug is inserted into the high-pressure air jet pipe, and an electrode at this tip is inserted. Facing the tip of the high-pressure air jet pipe,
A burner for a cremation furnace, characterized in that a straightening vane is inserted on the upstream side of the burner head to straighten the air-fuel mixture, and the outer pipe of the burner is attached so as to be movable inward of the furnace. 2. 1. The pilot flame hole having a rectangular cross section
Burner for cremation furnace as described. 3. The proportion of the air-fuel mixture ejected from the pilot flame hole,
20% to 2 with respect to the amount of air-fuel mixture ejected from the main flame hole
The burner for a cremation furnace according to the above 1 or 2, which is set to 5%.

[0006]

[Operation] When the burner is ignited, gas is supplied to the inner tube, air is supplied to the outer tube to mix in the outer tube of the burner, and then rectified by the rectifying plate and then mixed from the main flame hole and the pilot flame hole. When air is ejected and the spark plug is activated, first, the air-fuel mixture that is ejected from the main flame hole is ignited, then the air-fuel mixture that is ejected from the pilot flame hole is transferred, and the flame is generated at the tip of the combustion tube. It is formed. This flame can be made into a long flame and a straight-ahead flame (sharp flame) by adjusting the mixing ratio of air and gas and the ejection pressure. Furthermore, by providing a certain amount of pressure loss with the straightening vanes, the mixing of gas and air is promoted, and a stable flame is obtained.

The burner can further enhance the sharpness of the flame by ejecting high pressure air from the high pressure air ejection pipe into the main flame hole. When the burner head is advanced inside the furnace in this state, a powerful and sharp flame concentrates on a part of the casket. As a result, a part of the casket has a hole,
Since the flame enters from here, the flame rotation is accelerated and the combustion time can be greatly improved.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail with reference to FIGS. Reference numeral 1 is a burner outer tube, 2 is a combustion tube attached to the tip of the burner outer tube 1, 3 is a burner head incorporated in the combustion tube 2, and the burner head 3 has a main flame hole 4 in the center. The main flame hole 4 is formed with the pilot flame hole 5 having a quadrangular cross section on the outer periphery of the main flame hole 4.

Reference numeral 6 is the base portion of the burner outer tube 1, and 7 is this base portion 6.
An inner pipe inserted from the inside to the middle of the burner outer pipe 1, 8 is a high-pressure air jet pipe which faces the main flame hole 4 of the burner head 3 through the inner pipe 7, and 9 is a high-pressure air jet pipe 8 The spark plug is inserted into the main flame hole 4 and the electrode 10 at the tip of the spark plug is exposed.

Reference numeral 11 denotes a straightening plate installed in the burner head 3, and the straightening plate 11 has a large number of small holes 1.
2 are formed. Reference numeral 13 is a gas supply port, and 14 is an air supply port. 5 and 6, 15 is a furnace body, 16
Is a burner mounting plate, 17 is a support shaft, 18 is a cylinder for vertically controlling the angle of the burner head, and 19 is a viewing window.

The burner is slidably attached back and forth from the center of the inner part (rear wall) of the furnace body 15 of the cremation furnace toward the entrance side of the furnace. When burning, the gas and air are supplied first. The mixture is supplied and the spark plug 7 is driven to discharge at the electrode 10 portion to ignite the mixture gas ejected from the main flame hole 4 and the pilot flame hole 5 to ignite the flame at the tip of the combustion tube 3. To form. Further, by ejecting high-pressure air from the high-pressure air jet pipe 8, a sharp long flame and a straight flame are formed at the tip of the combustion pipe 3 by the high-speed jet flow. Immediately after the start of combustion, the burner is advanced to concentrate the flame on a part of the casket. Due to this concentration, the casket is quickly punctured in the concentrated part, and a flame enters into the casket through this hole, which accelerates the ignition around the casket and shortens the burning time. The rectifying plate 11 rectifies the gas and air mixed in the mixing space 1a of the burner outer tube 1 to increase the mixing ratio and form a stable flame.

In the embodiment, the ratio of the air-fuel mixture ejected from the pilot flame hole 5 is set to 22% with respect to the amount ejected from the main flame hole 4, so that a stable flame holding effect is exhibited, and in practical use. The range of 20 to 25% is most effective. Also, by making the cross section of the pilot flame hole 5 quadrangular, the overall opening area can be made large in a small area. Therefore, while the ratio is set to 20% to 25%, downsizing of the burner head portion ( (Smaller diameter) is possible.

[0013]

Since the present invention has the above configuration,
The following effects are obtained. a. A high-speed jet produces long flames and straight flames. b. Direct ignition with the spark plug ensures the ignition to the main burner. c. By supplying high-pressure air into the flame, a sharp flame can be formed, which makes it possible to quickly make a hole in the casket and accelerate the internal fire. Therefore, the combustion time can be shortened. d. Despite the high-speed flame, a straightening vane was inserted to increase the mixing ratio, and the amount of air-fuel mixture ejected from the pilot flame holes was set to 20% to 25% of the amount ejected from the main flame holes. The flame is stable and the flame holding property is improved. e. Since the flame becomes a long flame or a straight flame, the influence on the furnace body is reduced and the damage to the furnace material is reduced.

[Brief description of the drawings]

1 is a cross-sectional view of a cremation burner according to the present invention.

FIG. 2 is a sectional view taken along line AA ′.

FIG. 3 is a sectional view taken along line BB ′.

FIG. 4 is a sectional view taken along the line CC ′.

FIG. 5 is a front view of the gas burner attached to the cremation furnace.

FIG. 6 is a sectional view of the gas burner attached to a cremation furnace.

FIG. 7 is an explanatory diagram of a conventional cremation furnace burner.

[Explanation of symbols]

 1 Burner Outer Tube 2 Combustion Tube 3 Burner Head 4 Main Flame Hole 5 Pilot Flame Hole 6 Base 7 Inner Tube 8 High Pressure Air Jet Tube 9 Spark Plug 10 Electrode 11 Rectifier Plate 12 Small Hole 13 Gas Supply Port 14 Air Supply Port 15 Furnace Body 16 Burner mounting plate 17 Support shaft 18 Cylinder 19 Viewing window

Claims (3)

[Claims] 1. A burner head is attached to the tip of an outer burner tube, a burner head is inserted into the burner head, a main flame hole is formed in the center of the burner head, and a pilot flame is formed around the main flame hole. A hole is formed, an inner tube is inserted from the rear to the middle of the burner outer tube, gas is supplied into this inner tube, and combustion air is supplied from an air flow path formed by the inner tube and the burner outer tube. In a cremation burner configured to premix gas and air in an outer pipe of a burner and eject the gas from the main flame hole and the pilot flame hole, a high-pressure air ejection pipe is inserted into the inner pipe, and the high-pressure air ejection is performed. The tip of the tube was exposed in the main flame hole, the spark plug was inserted in the high-pressure air ejection tube, and the electrode at the tip was exposed to the tip of the high-pressure air ejection tube, the upstream side of the burner head. To A burner for a cremation furnace, characterized in that a straightening vane is inserted to straighten the air-fuel mixture, and the outer pipe of the burner is attached so as to be able to advance inward of the furnace. 2. The burner for a cremation furnace according to claim 1, wherein the pilot flame holes are formed to have a quadrangular cross section. 3. The cremation furnace according to claim 1, wherein the proportion of the air-fuel mixture ejected from the pilot flame holes is set to 20% to 25% with respect to the amount of the air-fuel mixture ejected from the main flame holes. For burner.