JPS58179717A - Method to increase heating and exhausting efficiencies of gas burner - Google Patents

Abstract

PURPOSE:To sufficiently get rid of exhaust gas, as well as to sufficiently contact flames with the air, by introducing fuel gas to a predetermined annular direction, by distributing and injecting the gas to ignite by giving a directional property and an angle to it to go to the same direction, and by raising flames in a swirling state. CONSTITUTION:The gas from the main pipe is injected from a main gas injection nozzle 1, and mixed gas is prepared by sucking the primary air from the main pipe of a mixed gas feed pipe 2 by the sucking function of the nozzle. A gas injection pipe 3, covered with a lid 7, and having the injection ports 4 of a gas injection pipe inside of it, is solidly connected to the mixed gas feed pipe 2 by the intermediary of a connecting pipe 8. The lid 7 is formed of an inwardly slanted surface 9, slanting downward to the center along the open surface of a torus 3a, having a specified angle with the horizontal direction. On the surface of a lid 7, an injection guide channel 10 and injection ports 6 are cut along the circumference, having a slanted angle to the proceeding direction 13 of the gas. With such an arrangement, flames formed on the injection ports 6 are raised swirling, so that heating effect to an object to be heated can be heightened.

Description

Detailed Description of the Invention The present invention allows a mixed gas of air and source gas to flow in a fixed direction in an annular gas injection pipe, and directs the gas from the injection port with directionality and angle that conform to the flow direction. A method for promoting heating and exhaust efficiency of a gas combustor, which improves contact between the flame and air by ejecting the flame and swirling it upward along the surface of the object to be heated, and also improves the exhaust of exhaust gas generated by combustion of gas. This is related to.

The purpose of this is to improve the heating and exhaust effects of the gas combustor to improve complete combustion, improve heating and combustion efficiency, and achieve energy savings.

Conventionally, in this type of gas burner such as a gas stove, a mixed gas transport pipe is connected in a direction perpendicular to the outer periphery of an annular gas injection pipe, and a flame is directed through the injection pipe in the -E direction toward the center of the injection pipe. The injection port is drilled by changing the direction of gas flow and traveling direction so that the gas is concentrated, and the mixed gas supplied from the mixed gas transport pipe inevitably bifurcates due to the connection of the gas injection pipe to the transport pipe. The mixed gases branch out and proceed through the annular part, and on the opposite side of the gas injection pipe that faces the transport pipe continuous part, the branched mixed gases collide, and their respective flow velocities cancel each other out, and eventually the pressure of the light gas and each injection port The flow velocity determined by the cross-sectional area of There is a disadvantage that the injection pressure injected from the injection nozzle decreases due to the resistance of Therefore, the flame at the collision part is cut off from contact with the outside air and the supply of secondary air is insufficient, causing incomplete combustion and releasing harmful gases that are not yet used for combustion into the atmosphere. This has the major disadvantage that the combustion efficiency of the fuel decreases, and as a result, the heating efficiency also decreases, making it impossible to achieve energy savings.

However, in the present invention, since the mixed gas from the mixed gas transport pipe is made to flow in from the tangential direction of the annular injection pipe, the gas flows in the same direction within the injection pipe at the flow velocity given by the source gas injection nozzle. However, the flow pressure of the gas inside the injection pipe is added to the pressure of the original gas, and as a result, the flow velocity of the gas ejected from the injection nozzle becomes more than twice the speed of the conventional one, and the flame Sufficient pressure is applied to the heating effect, which improves the heating effect. In addition, since the injection groove of the injection pipe has a directionality and an angle that conform to the flow direction of the gas so that the gas swirls, the direction of gas injection from the injection port is regulated, and the flame is the most suitable for swirling. Proceeds in an effective direction, does not cause a drop in injection pressure like in the past, and the flame is used for heating purposes! lJ
The flame rotates upward along the surface, increasing the contact with the surface of the object to be heated and increasing the contact surface of the flame with the outside air, which improves the heating effect.
Furthermore, since a sufficient amount of secondary air is supplied, incomplete combustion does not occur, and combustion efficiency is improved, resulting in energy savings. Furthermore, in the present invention, the gas flow velocity at the injection ports is high, more than double that of the conventional method, so even if the cross-sectional area of the injection ports is reduced to 1/2, the flow rate of gas ejected from each injection port is The amount is the same as before, and the heating and
The combustion effect is increased, and the injection port does not become distorted.

However, in conventional equipment, when the gas supply amount is halved due to slow fire, etc., the gas flow rate is halved and the amount of flame, especially the length of the flame, is halved, sometimes with the danger of extinguishing the flame, and the heating effect is drastically reduced. In the present invention, the cross-sectional area of the injection port is 1/2, so even if the gas supply amount is halved, the same flow rate as before is maintained, there is no danger of extinguishing the flame, and the heating effect does not decrease sharply, so the effect is maintained. However, it is 7).

Reference will now be made in detail to the accompanying drawings, which illustrate one example of carrying out the invention. 1 is a known source gas injection nozzle installed at the base of the mixed gas transport pipe 20, which injects the source gas from the nozzle 1 and sucks primary air from the base of the transport pipe 2 by utilizing its suction action. It is a mixed gas. 3 is an annular gas injection pipe, and as shown in Fig. 2, the h-plane open area of the circular ring 3a with the upper surface open is lowered in the center direction on the L-plane, making an angle of 20 to 30 degrees with the horizontal direction. It is airtightly closed by a lid body 7 having an inner sloped surface 9, and an annular gas injection pipe hole 4 is formed inside the lid body 7.

Reference numeral 5 denotes a central vent hole of the ring 3a, which controls the supply of secondary air. Reference numeral 6 denotes an injection port, which has an opening on the circumference of the lid body 7 at intervals of 4 cm or less and a length of 5 cm, as shown in FIG. The injection guide groove 10 is bored at an angle of inclination of 100°, and the cross-sectional area is adjusted appropriately at the upper end of the lid 7. This is what I did. Reference numeral 8 denotes a connecting portion which is connected to the annular ring 8a of the gas injection pipe 3 in a tangential direction as shown in FIG. As shown in FIG. 2, there is a mixed gas vent 4a and a vent 15 for swirling excess gas at the end of the annular injection pipe 3 in the gas traveling direction 13.
It is divided into two parts. 11 is an object to be heated. 1
Reference numeral 2 ignites the mixed gas injected from the injection port 6 with a flame, and the mixture gas swirls upward along the heated object 111m as shown in FIG. 14 auxiliary holes for gas injection, cover 7
As shown in FIG. 1, grooves are bored in the middle of the inwardly inclined surface 9 to communicate with the injection pipe holes 4, as shown in FIG. The purpose is to heat the central part of the lower surface of the heating object 11, but there is no collision between the flames, and the flames are in sufficient contact with the secondary air from the central flame vent 5. However, incomplete combustion will not occur. Reference numeral 16 denotes a cover which opens the upper surface of the gas injection pipe 3 as shown in FIG.

In carrying out the present invention, the injection groove is designed to be inclined inwardly or outwardly at an angle within the effective flame rotation range of approximately 20 to 30 degrees, depending on the size or purpose of the device. There are some cases where efficiency can be further increased.

[Brief explanation of the drawing]

The accompanying drawings show an example of carrying out the present invention, and FIG. 1 is a plan view, FIG. 2 is a sectional view taken along the line A--A in FIG. 1, and FIG. 3 is a side view during use. l...Original gas injection nozzle, 2...Mixed gas transport pipe 1
3... Annular gas injection pipe, 3a... Annular, 4... Gas injection pipe hole, 4a... Mixed gas vent, 5... Center vent, 6... Injection port, 7... Lid body, 8... Connection portion, 9... Inward inclined surface, 10... Injection guide groove, 11
...Heating object, 12...Flame, 13...Advancing direction, 14...Auxiliary hole for gas injection, 15...Swivel vent, 16...Cover. M/Figure 2 Figure 3//

Claims (1)

[Claims] A heating method for a gas combustor, which is characterized by guiding fuel gas in a certain annular direction, and then igniting the branch jet by giving the direction and angle that conform to the guiding direction, and causing the flame to rise in a whirlpool shape. How to promote exhaust efficiency.