JP2916404B2 - Panel integrated regenerative combustion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel-integrated regenerative combustion device having a burner and a regenerator.

[0002]

2. Description of the Related Art As shown in FIG. 8, a regenerative combustion device 2 is generally composed of two units and each burner 4 is connected to a regenerator 6 filled with a thermal storage medium. Requires more space than non-thermal storage combustion devices. Therefore, in order to reduce the space occupied by the regenerative combustion device, it is conceivable to provide a space in a part of the furnace wall, accommodate a heat storage medium in the space, and use the heat storage medium. By doing so, the space occupied solely by the regenerator is reduced, but there are the following problems.

[0003]

First, the first problem is that the furnace wall is composed of an outer metal furnace shell and a heat insulating material provided inside thereof, and a space is formed in a part thereof. The use of the regenerator reduces the heat insulating effect of the furnace wall.
The second problem is that if a space for a regenerator is formed in the furnace wall, the thickness of the heat insulating material at that portion is reduced and the strength is reduced. A third problem is that the furnace wall with reduced strength is heated / cooled at each switching cycle of burner combustion / non-combustion, and repeats expansion and contraction each time to promote fatigue fracture.

[0004]

Therefore, in the panel-integrated regenerative combustion device of the present invention, the outer shell for the burner and the outer shell for the regenerator have an integral structure of refractory material, and this integral structure is provided on the furnace wall. The outer surface of the front part of the outer shell for the regenerator can be fitted into the opening with the outer surface being flush with the inner surface of the furnace wall.

[0005]

According to the above construction, a part or most of the burner and the regenerator are fitted into the furnace wall, so that the protrusion outside the furnace is small and the occupied space is reduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 3 show a panel-integrated regenerative combustion device according to the present invention (hereinafter referred to as a “regenerator combustion device”).
). In these figures, the regenerative combustion device generally designated by reference numeral 8 has a burner 10 and a regenerator 12 integrally formed, and has a rectangular box shape when viewed from the front. An opening 16 is formed at the front (right side in FIG. 1) of the burner shell 14 made of a refractory material, and a burner tile 18 is fitted therein. Burner tile 1
A plurality of grooves 20 extending back and forth are formed around the periphery of the nozzle 8, and a secondary air nozzle 22 is formed by the grooves 20 and the opening 16 covering the periphery thereof. Burner tile 18
Is formed with a plurality of primary air nozzles 26 at equal intervals along a circumference centered on the fuel nozzle 24, and an opening 2 provided at the rear of the burner shell 14 is formed.
The fuel supply pipe 30 inserted from 8 connects to the fuel nozzle 24. The regenerator outer shell 32 made of a refractory material has a supply / exhaust port 34 at a rear portion thereof, and the supply / exhaust port 34 is covered with a gas-permeable member such as a wire mesh 36. The vacant space 38 in the outer shell 32 for the heat storage communicates with the inside of the outer shell 14 for the burner, and accommodates a large number of heat storage media 40.

As described above, the regenerative combustion device 8 of the present invention has a structure in which the burner shell 14 and the regenerator shell 32 are integrated. As shown in FIG. 1, the regenerative combustion device 8 having an integral structure is provided on the furnace wall 44 in a state where the outer surface of the front part of the outer shell for the regenerator is flush with the inner surface of the furnace wall 44. It is fitted and fixed in the opening 46. Therefore, attachment of the regenerative combustion device 8 to the furnace wall 44 is extremely simple. In addition, since a part of the regenerative combustion device 8 is inserted into the furnace wall 44, the protruding length from the furnace wall 44 is short, and the space occupied by the outside of the furnace 48 is small. As shown in FIG. 4, a plurality of regenerative combustion devices 8 can be arranged in parallel and fitted into the opening 46 of the furnace wall 44.

The regenerative combustion device 8 having the above configuration operates as follows. First, at the time of waste heat recovery in which the exhaust gas in the furnace 50 is sucked and the waste heat is recovered in the heat storage medium 40, the exhaust gas in the furnace 50 is discharged from the primary air nozzle 26 and the secondary air nozzle 2
2. Air is exhausted from the air supply / exhaust port 34 via the empty space 38. At this time, the heat of the exhaust gas is recovered by the heat storage medium 40. Next, at the time of fuel combustion, the combustion air passes from the air supply / exhaust port 34 to the vacant space 38 and comes into contact with the heat storage medium 40 to become high temperature.
From the primary air nozzle 26 and the secondary air nozzle 22
Sent out to. On the other hand, fuel is ejected from the fuel supply pipe 30 toward the furnace interior 50, and is burned by high-temperature air.

FIGS. 5 to 7 show a second embodiment of the regenerative combustion device. The outer shell 54 of the regenerative combustion device 52 is generally composed of an outer shell 56 for a burner and an outer shell 58 for a regenerator surrounding the outer shell 56. Both outer shells 56 and 58 are formed in a substantially cylindrical shape. ing. The burner shell 56 has a burner tile 62 in its front opening 60. A plurality of secondary air nozzles 64 extending in the axial direction of the burner shell 56 are formed around the burner tile 62 in the same manner as in the first embodiment. The burner tile 62 is also provided with a fuel nozzle 66 at a central portion thereof, and a plurality of primary air nozzles 68 provided at equal intervals on a circle around the fuel nozzle 66 so as to be inserted from a rear portion of the burner shell. Fuel supply pipe 70
Are connected to the fuel nozzle 66. Outer shell for burner 56
Further, a gas supply / exhaust port 72 is provided at the upper part thereof, and exhaust gas of the furnace 50 and high-temperature air can be supplied through the gas supply / exhaust port 72. Outer shell 58 for heat storage
Are circular openings 78 in its front wall 74 and rear wall 76, respectively.
The openings 78 and 80 hold the burner shell 56. An air supply / exhaust port 82 is formed in a lower portion of the rear wall 80. In the space between the outer shell 58 for the heat storage and the outer shell 56 for the burner, a supply / exhaust port 8 is provided.
A heat storage medium 86 and a gas permeable upper plate 88 and a lower plate 90 for restricting the movement of the heat storage medium 86 are arranged on both sides of the heat storage medium 86.

The regenerative combustion device 52 having the above configuration
Is fitted and fixed in an opening provided in the furnace wall. Therefore, as in the first embodiment, since a part of the regenerative combustion device 52 is housed in the furnace wall, the protruding length from the furnace wall is short, and the space occupied by itself can be reduced.

According to the regenerative combustion device 52, at the time of waste heat recovery, the exhaust gas sucked from the primary air nozzle 68 and the secondary air nozzle 64 enters the space 84 via the supply / exhaust port 72, and the heat storage medium 86 After the waste heat is taken away by the above, the exhaust gas is exhausted from the lower supply / exhaust port 82. On the other hand, at the time of fuel combustion, the combustion air supplied from the supply / exhaust port 82 comes into contact with the heat storage medium 86 and is preheated, passes through the supply / exhaust port 72, and the primary air nozzle 6
8 and the secondary air nozzle 64 ejects the fuel supply pipe 70
The fuel is injected into the furnace through a fuel nozzle 66 for combustion of fuel.

Although the shape of the outer shell viewed from the front is square in the first embodiment and circular in the second embodiment, the shape may be polygonal or elliptical.

[Brief description of the drawings]

FIG. 1 is a sectional view of a panel-integrated regenerative combustion device according to the present invention.

FIG. 2 is a front view of the panel-integrated regenerative combustion device shown in FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is a plan view showing a state in which the panel-integrated regenerative combustion devices shown in FIG. 1 are arranged in parallel.

FIG. 5 is a cross-sectional view of a panel-integrated regenerative combustion device according to a second embodiment.

FIG. 6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a front view of the panel-integrated regenerative combustion device shown in FIG.

FIG. 8 is a diagram showing a conventional regenerative combustion device and its arrangement.

[Explanation of symbols]

8 ... panel integrated type regenerative combustion device, 10 ... burner, 12
... regenerator, 14 ... burner shell, 32 ... regenerator shell,
44: furnace wall, 46: opening.

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Yu Kitamura 2-4-7 Kyomachibori, Nishi-ku, Osaka-shi, Osaka Inside Chugai Furnace Industry Co., Ltd. (56) References JP-A-7-133906 (JP, A) Kaihei 9-170748 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) F23L 15/02 F23C 5/00

Claims (1)

(57) [Claims] In a regenerative combustion device in which a burner is connected to a regenerator, an outer shell for the burner and an outer shell for the regenerator have an integral structure of a refractory material, and the integral structure is provided in an opening provided in a furnace wall. A panel-integrated regenerative combustion apparatus characterized in that it can be fitted in a state where the outer surface of the front part of the outer shell for the regenerator is flush with the inner surface of the furnace wall.