JPH09184616A - Regenerative combustion device integral with panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease a protrusion outside a furnace and reduce an occupied space by integrally forming the outer shell of a burner with the outer shell of a regenerator by using a fire-resisting material and freely fitting the integral structure into an opening part formed on a furnace wall. SOLUTION: An opening part 16 is formed on the front part of a burner outer shell 14 made of a fire-resisting material. A burner tile 18 is fitted into the opening. A free chamber 38 in a regenerator outer shell 32 communicates with the inner part of the burner outer shell 14 and many regenerative media 40 is housed therein. In such a way, the burner outer shell 14 is integrally formed with the regenerator outer shell 32 to have a panel structure. A regenerative combustion device 8 is fitted into and fixed to an opening part 46 formed on a furnace wall 44. Thus, the regenerative combustion device 8 can be extremely simply attached to the furnace wall 44. Since a part of the regenerative combustion device 8 is inserted into the furnace wall 44, the length of protrusion from the furnace wall 44 is decreased, so that an occupied space outside 48 the furnace is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage type combustion device having a burner and a heat storage device.

[0002]

2. Description of the Related Art As shown in FIG. 8, two heat storage type combustion devices 2 generally form one set, and each burner 4 is connected to a heat storage device 6 filled with a heat storage medium. It requires a larger space than a non-heat storage type combustion device. Therefore, in order to reduce the occupied space of the heat storage type combustion device, it is conceivable to provide a space in a part of the furnace wall and store the heat storage medium in the space to use it as a heat storage device. By doing so, the space occupied by the heat accumulator alone becomes small, but there are the following problems.

[0003]

First of all, the first problem is that the furnace wall is composed of an outer metal furnace shell and a heat insulating material provided inside thereof, but a space is formed in a part thereof. The use of a heat storage means reducing the heat insulation effect of the furnace wall.
A second problem is that if a space for a heat storage device is formed in the furnace wall, the thickness of the heat insulating material in that portion is reduced and the strength is reduced. The third problem is that the furnace wall whose strength has decreased is heated / cooled at each burner combustion / non-combustion switching cycle, and expansion and contraction are repeated each time to promote fatigue fracture.

[0004]

Therefore, in the panel integrated heat storage type combustion apparatus of the present invention, the burner outer shell and the regenerator outer shell have a refractory integral structure and can be fitted into the opening provided in the furnace wall. I did it. Note that this integrated structure has a quadrangle or a circle when viewed from the front.

[0005]

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

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to the drawings. 1 to 3 show a panel integrated heat storage type combustion apparatus (hereinafter referred to as "heat storage type combustion apparatus") according to the present invention. In these figures, the heat storage type combustion apparatus indicated by reference numeral 8 as a whole has a burner 10 and a heat storage unit 12 integrally formed, and has a rectangular box shape when viewed from the front. An opening 16 is formed in the front portion (right side in FIG. 1) of the burner outer shell 14 made of a refractory material, and the burner tile 18 is fitted therein. A plurality of groove portions 20 extending in the front-rear direction are formed around the burner tile 18, and the secondary air jet nozzle 22 is formed by the groove portions 20 and the opening 16 that covers the periphery thereof. A fuel nozzle 24 is formed in the burner tile 18, and a plurality of primary air nozzles 26 are formed at equal intervals along a circumference centered on the fuel nozzle 24. The inserted fuel supply pipe 30 is connected to the fuel nozzle 24. The heat storage outer shell 32 made of a refractory material is provided with an air supply / exhaust port 34 at the rear part, and the air supply / exhaust port 34 is covered with a breathable member such as a wire mesh 36. Further, the vacant chamber 38 in the heat storage shell 32 communicates with the inside of the burner shell 14, and accommodates a large number of heat storage media 40.

As described above, in the heat storage type combustion apparatus 8 of the present invention, the burner outer shell 14 and the regenerator outer shell 32 are integrated into a panel structure. Further, as shown in FIG. 1, the regenerative combustion device 8 is fitted and fixed in an opening 46 provided in the furnace wall 44. Therefore, attachment of the heat storage type combustion device 8 to the furnace wall 44 is extremely easy. Further, since part of the heat storage type combustion device 8 is inserted into the furnace wall 44,
The projecting length from No. 4 is short, and the space occupied by the outside of the furnace 48 is small. As shown in FIG. 4, a plurality of heat storage type combustion devices 8 may be arranged in parallel and fitted into the opening 46 of the furnace wall 44.

The heat storage type combustion device 8 having the above construction operates as follows. First, at the time of waste heat recovery in which exhaust gas in the furnace 50 is sucked and waste heat is recovered in the heat storage medium 40, the exhaust gas in the furnace 50 is exhausted from the air supply / exhaust port 34 through the air nozzles 22 and 26 and the vacant chamber 38. It At this time, the heat of the exhaust gas is recovered in the heat storage medium 40. Next, at the time of combustion of the fuel, the combustion air passes from the air supply / exhaust port 34 through the vacant chamber 38, comes into contact with the heat storage medium 40, and reaches a high temperature.
6 is sent toward the inside 50 of the furnace. On the other hand, fuel is ejected from the fuel ejector 30 toward the inside of the furnace 50, and this is combusted by the hot air.

FIGS. 5 to 7 show a second embodiment of the heat storage type combustion apparatus. The outer shell 54 of the heat storage type combustion device 52 is roughly
The burner outer shell 56 and a heat storage outer shell 58 surrounding the burner outer shell 56 are formed, and the outer shells 56 and 58 are both formed in a substantially cylindrical shape. The burner shell 56 has a burner tile 62 in its front opening 60. Burner tile 6
Similar to the first embodiment, a plurality of secondary air nozzles 64 extending in the axial direction of the burner outer shell 56 are formed around the circumference of 2. The burner tile 62 is also provided with a fuel nozzle 66 in its central portion, and a plurality of primary air nozzles 68 are equidistantly arranged on a circumference around the fuel nozzle 66.
A fuel supply pipe 70 inserted from the rear of the burner shell is connected to the fuel nozzle 66. The burner outer shell 56 is also provided with an air supply / exhaust port 72 at its upper part, through which air can flow in and out. The heat storage shell 58 has circular openings 78 and 80 on its front wall 74 and rear wall 76, respectively.
The outer shell 56 for the burner is held by 8, 80.
An air supply / exhaust port 82 is formed in the lower portion of the rear wall 80. In the space between the heat storage outer shell 58 and the burner outer shell 56, a heat storage medium 86 is provided on both sides of the air supply / exhaust port 82.
A breathable upper plate 88 and a lower plate 90 that restrict the movement thereof are arranged.

The heat storage type combustion device 52 having the above structure
Is fixed by being fitted into an opening provided in the furnace wall. Therefore, as in the case of the first embodiment, the heat storage type combustion device 52 is partially housed in the furnace wall, so that the protruding length from the furnace wall is short and the space occupied by itself is small.

According to the heat storage type combustion device 52, the exhaust gas sucked from the primary air nozzle 68 and the secondary air nozzle 64 enters the space 84 via the air supply / exhaust port 72 when the waste heat is recovered, and then the heat storage medium 86. After the waste heat is taken away, the air is exhausted from the lower air supply / exhaust port 82. On the other hand, during combustion of the fuel, the combustion air supplied from the air supply / exhaust port 82 comes into contact with the heat storage medium 86 and is preheated, and passes through the air supply / exhaust port 72 to the primary air nozzle 6
8 and the secondary air nozzle 64, and the fuel supply pipe 70
Is used for combustion of the fuel ejected into the furnace through the fuel nozzle 66.

Although the shape of the outer shell viewed from the front is quadrangular 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 heat storage type combustion apparatus according to the present invention.

FIG. 2 is a front view of the heat storage type 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 heat storage combustion devices shown in FIG. 1 are arranged in parallel.

FIG. 5 is a sectional view of a heat storage type combustion apparatus according to a second embodiment.

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

FIG. 7 is a front view of the heat storage combustion device shown in FIG.

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

[Explanation of symbols]

8 ... Heat storage type combustion device, 10 ... Burner, 12 ... Heat storage device, 1
4 ... Burner outer shell, 32 ... Regenerator outer shell, 44 ... Furnace wall, 46
…Aperture.

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Yu Kitamura 2-4-7 Kyomachibori, Nishi-ku, Osaka-shi, Osaka Inside Chugai Furnace Industry Co., Ltd.

Claims (3)

[Claims] 1. A heat storage type combustion apparatus comprising a burner and a heat storage device, wherein the burner outer shell and the heat storage outer shell are made of a refractory body and can be fitted into an opening provided in a furnace wall. Panel-integrated heat storage type combustion device characterized by: 2. The panel-integrated regenerative combustion device according to claim 1, wherein the integrated structure has a rectangular shape when viewed from the front. 3. The panel-integrated regenerative combustion device according to claim 1, wherein the integrated structure has a circular shape when viewed from the front.