JPH0616260Y2 - Radiant cup burner - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention can efficiently heat to a high temperature by focusing on the fact that most of the heat transfer to the object to be heated at a relatively high temperature is due to radiation. Regarding improvement of cup burner.

Conventional technology Since the conventional radiant cup burner is a premix type, there is a risk of flashback, so it is not possible to use sufficiently preheated air, and in addition to the high temperature furnace where strong radiant heat is applied to the cup burner. Could not be used.

Problems to be solved by the invention Therefore, a cup burner is brought close to and burns an object to be heated which requires high temperature heating so that strong radiant heat is applied to heat the object. However, there is an inconvenience in that the risk of flashback is increased due to the reflected heat from the object to be heated and the cup burner facing the object.

Means for Solving the Problems The present invention relates to a nozzle mix type cup burner in which preheated air is used as combustion air, and an inner pipe for supplying preheated air and an outer pipe for supplying gas are integrally coaxial. Providing a radiant cup burner that penetrates the center of the burner tile and opens a combustion port at the center bottom of the radiating surface, and has a concave curved surface on the lower side of the front side of the burner tile outside the radiating surface or on the opposite upper and lower sides. To do.

Action By using the above radiant cup burner, the combustion air can be preheated to about 200 ° C to 600 ° C, and a large number of cup burners can be installed to face each other in a small heating furnace due to the shape of the burner tile.

Embodiment An embodiment of the radiant cup burner according to the present invention will be described with reference to FIGS. 1 and 2.

In the figure, (1) is a ceramic burner tile that constitutes the main body of the burner, and like the conventional radiant cup burner, a plurality of ring-shaped recesses are formed on the front surface to increase the radiation efficiency. It has a face (1a).
(2) is a premixed blast burner arranged at the center of the burner tile, in which the outer pipe (4) for supplying gas to the inner pipe (3) for supplying air is coaxially integrated with the center of the burner tile (1). The burner has a combustion port (5) opened at the center bottom of the radiation surface (1a). It should be noted that the flame spreads around due to the existence of the burner top (6) and the radiation surface (1a)
It is the same as the conventional burner of this kind that it is heated to radiate heat.

The radiant cup burner of the present invention is a burner tile (1)
The front surface of the cup is formed into a concave curved surface, and one side (7) or a pair of opposite sides (7 ') with the burner top (6) sandwiched therebetween is formed into a curved surface with the center retracted. In a furnace or the like in which burners are opposed to each other, the space can be effectively used, and the burners can be brought close to each other to provide strong radiant heat to an object to be heated. Since the burner of the present invention is a premixed blast burner that does not cause flashback even if the combustion air is preheated, the combustion air can be sufficiently preheated, and the blast burner (2) is connected to the outer pipe (4). ) Is supplied as gas and the inner tube (3) is supplied as air, the air in the preheated inner tube (3) is
The gas inside the outer tube (4) that surrounds the burner tile is effectively heated without being absorbed by the burner tile, facilitating the subsequent combustion, uniformly heating the radiating surface (1a), and completely burning it. You can Therefore, it becomes possible to perform heating close to the object to be heated, and when installing this burner on the bottom of the furnace, use the concave curved surface only on one side (7) on the lower side, but use this burner vertically. In order to do so, it is necessary to make one pair with the side (7 ') on the opposite side across the burner top (6) a concave curved surface. [Refer to FIG. 3] If the angle formed on the front side of both outer edges of the burner tile of this cup burner is 90 ° or 60 °, the former is 4 pieces and the latter is 6 pieces. It is convenient for forming a wall by forming a wall. [Refer to FIG. 4] Effect of the Invention As already described in the embodiment, as a high temperature heating furnace utilizing strong radiant heat, it is effective to bring a radiant cup burner close to the object to be heated. Since the burner had a lower limit due to flashback due to reflected heat from the object to be heated and incomplete combustion due to approaching, the burner of the present invention withstands the above-mentioned reflected heat and increases combustion efficiency, and at the same time as the premixed blast burner. And air in the inner tube,
By supplying gas to the outer tube to heat the radiant surface uniformly and curving the horizontal axis of the burner tile front surface of the cup burner to eliminate wasted space in the heating furnace, the burner is brought closer to the object to be heated It enables heating.

[Brief description of drawings]

Fig. 1 is a front view of the burner of the present invention, and Fig. 2 is Fig. 1 II-II.
FIG. 3 is a sectional view taken along the line, FIG. 3 is a perspective view, and FIG. 4 is a perspective view of another embodiment. (1) ...... Burner tile, (1a) ...... Radiating surface, (2) ...... Blast burner, (3) ...... Inner tube, (4) ...... Outer tube, (5) ...... Combustion port, (6 ) …… Burner top, (7) …… side.

Claims (1)

[Scope of utility model registration request] 1. In a nozzle-mix type cup burner in which preheated air is used as combustion air, an inner pipe for supplying preheated air and an outer pipe for supplying gas are integrally coaxially arranged at the center of the burner tile. A radiant cup burner characterized in that a combustion port is opened at the center bottom of the radiating surface, and the lower side of the front side of the burner tile outside the radiating surface or the opposite upper and lower sides are concave curved surfaces.