JPS599152Y2 - nozzle mix gas burner - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a nozzle mix type gas burner suitable for maintaining glass at a constant temperature in a fining tank feeder of a glass melting furnace or the like.

Materials for glass molded products, such as cathode ray tubes, glass tubes, thermos bottles, tableware, etc., are generally kept at temperatures between 1200°C and 1600°C.
The material is melted at a high temperature, homogenized in a feeder, and then transferred to a molding process.

The feeder is generally 3 m to 7 m long, and keeping the molten glass at a uniform temperature throughout is an extremely important job and the most nerve-wracking task.

In such cases, it is common knowledge that it is more effective to use a large number of small burners than a small number of large burners, and it is also common knowledge to connect a common air supply pipe and fuel pipe to these large number of small burners. It's technology.

Generally, glass melting operations operate 24 hours a day (no breaks even during New Year's holidays), so simplifying work procedures and saving fuel gas are major issues.

Furthermore, simplification of equipment is also a major factor in reducing costs.

In this regard, there are generally two types of gas burners: nozzle mix type and premix type.

In the premix type, fuel gas and air are mixed in advance and sent to the burner.

This type of burner is prone to backfire and has a narrow range in which combustion conditions can be adjusted.

Furthermore, since a mixing device for mixing the fuel gas and air is required, there is a drawback that large equipment costs are required.

This nozzle mix type gas burner was developed to solve the various problems mentioned above, and roughly speaking, it consists of a number of outer cylinders attached to a common fuel air supply pipe,
In a nozzle mix gas burner that is attached to a common fuel gas supply pipe and includes small-diameter inner cylinders housed in each of the outer cylinders, the tip of each of the inner cylinders is located inward from the open end of the outer cylinder and closed. At the same time, a large number of small diameter holes are bored in the side wall of the inner cylinder at an acute angle with respect to the center axis of the inner cylinder, so that the fuel gas ejected from the inner cylinder through the small holes collides with the inner wall of the outer cylinder, causing the outer cylinder to collapse. This is a nozzle gas burner that is characterized by being well mixed with the circulating air inside.

Hereinafter, the structure of the present invention will be explained based on embodiments shown in the drawings.

As shown in FIG. 1, the burner of the present invention has a large number of outer cylinders 1 attached to a combustion air supply pipe 3 at equal intervals and parallel to each other.

In FIG. 2, the inner cylinder 4 has one end connected to a fuel gas supply pipe 9, and the other end closed so that the inner cylinder 4 is positioned near the opening 2 inside the outer cylinder 1. It is supported within the cylinder 1 by a support 7.

A plurality of small holes 5 are formed in the closed end of the inner cylinder 4, forming a nozzle part 6.

The small hole 5 is opened diagonally toward the middle direction between the opening 2 direction of the outer cylinder 1 and the inner wall direction, that is, the small hole 5 opens forward. The supplied fuel gas is ejected obliquely from the nozzle portion 6 toward the inner wall of the outer cylinder 1, and mixes well with the air inside the outer cylinder 1.

The support 7 has a disk shape, has a hole in the center for inserting and supporting the inner cylinder 4, and has a large number of penetrating holes 8 around the hole for passing combustion air.

Combustion air passes from the combustion air supply pipe 3, through the air passage 12 formed by the inner cylinder 4 and the outer cylinder 1, and through the hole 8 of the support 7, and reaches the outer cylinder opening 2. There is.

The combustion air supply pipe 3 and the fuel gas supply pipe 9 are made sufficiently large so that air and fuel gas can be sent evenly to each burner.

13 is a flange, 14 is a heat insulator, and 15 is a cover.

In order to use the burners to maintain a constant temperature in the feeder of a glass melting furnace, the burners are mounted on both sides of the feeder 17 facing each other, as shown in FIG. When the fuel gas is introduced into the supply pipe 9 and the combustion air is introduced from the air introduction pipe 11 into the air supply pipe 3, the fuel gas ejected obliquely from the small hole 5 of the nozzle part 6 will be It mixes well with the combustion air in the outer tube 1, blows out from the opening 2, burns, and becomes a flame that covers the surface of the molten glass in the feeder, keeping the entire molten glass at a uniform and constant temperature. Keep it.

16 is a molten glass, and 18 is an exhaust gas outlet.

In the burner of the present invention, high temperature air can be used as the combustion air.

Conventional premix burner: 3500-6000k
Cal/HR capacity is the limit, but if high temperature air is used with the burner of this invention, it can reach 20,000 to 30,000 k.
cal/HR is also possible.

In order to adjust the flame of the burner of the present invention, it is not necessary to adjust the amount of air in each outer cylinder 1 and the amount of fuel gas in each inner cylinder 4. You can adjust the whole thing evenly by adjusting it.

It also has a wide range of adjustment. As described above, the 7 Zulmics gas burner of this invention is an excellent burner that is easy to operate and has a wide range of uses.

[Brief explanation of drawings]

The drawings all show embodiments of the present invention, and FIG. 1 is a perspective view, FIG. 2 is an enlarged cross-sectional view taken along line A-A' in FIG. 1, and FIG.
The figure is an explanatory cross-sectional view showing an example of use of the gas burner of the present invention. 1... Outer cylinder, 2... Opening, 3...
...Combustion air supply pipe, 4...Inner cylinder, 5...
...Small hole, 6...Nozzle part, 7...
・Support, 8... Hole, 9... Fuel gas supply pipe, 10... Fuel gas conduit, 11...
... Air introduction pipe, 12 ... Air passage, 13 ...
... Flange, 14 ... Heat insulation material, 15 ...
... Cover, 16 ... Molten glass, 17.
...Feeder, 18...Exhaust gas outlet.

Claims (1)

[Scope of utility model registration request] In a nosulmics gas burner consisting of a large number of cylinders attached to a common fuel air supply pipe, and a small-diameter inner cylinder installed in a common fuel gas supply pipe and housed in each outer cylinder, each of the above-mentioned The long end of the inner tube is inside the open end of the outer tube, and when it is closed, a large number of small diameter holes are drilled in the side wall at an acute angle to the center axis of the inner tube. A nozzle mix gas burner characterized in that the fuel gas ejected from the inner reservoir once collides with the inner wall of the outer cylinder and mixes well with the circulating air inside the outer cylinder.