JP2803533B2 - Heat storage type combustor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reduces the size of equipment by providing a regenerative combustor, especially a regenerator attached to a burner, with a function of switching between combustion air blowing and exhaust gas suction. And a heat storage type combustor.

[0002]

2. Description of the Related Art A regenerative combustor is used in a heating furnace, a melting furnace, and the like. A conventional regenerative combustor attached to a heating furnace will be described with reference to the drawings.

FIG. 2 is a sectional view of a conventional regenerative combustor attached to a heating furnace.

In FIG. 2, reference numerals 1a and 1b denote a pair of burners provided on the furnace wall 2, and 2a and 2b denote burners 1
A heat storage element attached to a and 1b, and is formed of a honeycomb structure made of, for example, ceramics through which air and exhaust gas freely pass. Reference numerals 3a and 3b denote on-off valves (closed valves indicate closing valves; the same applies hereinafter) attached in the middle of the fuel pipe 4 connected to the burners 1a and 1b.
5a and 5b are on-off valves attached in the middle of the combustion air pipe 6 connected to the heat storage bodies 2a and 2b, and 7a and 7b are:
An on-off valve attached in the middle of the flue gas pipe 8 connected to the heat storage bodies 2a, 2b, and 9 is a suction blower for flue gas in the furnace attached to the flue gas pipe 8.

[0005] The conventional regenerative combustor described above operates as follows. That is, when one burner 1a is burning, the on-off valves 3a, 5a and 7b are opened, and the on-off valves 3b, 5b and 7a are closed. As a result, fuel and combustion air are supplied to one burner 1a, and one burner 1a is brought into a combustion state. Then, the high-temperature combustion exhaust gas in the furnace is discharged to the outside of the furnace by the suction blower 9 through the other burner 1b and the regenerator 2b. Thereby, the sensible heat of the combustion exhaust gas is stored in the heat storage body 2b of the other burner 1b.

After a lapse of a predetermined time, the on-off valves 3a, 5a and 7b are closed, and the on-off valves 3b, 5b and 7a are opened. As a result, the combustion of the other burner 1b is started, but the combustion air is preheated by passing through the heated regenerator 2b of the other burner 1b. For combustion. During this time, the sensible heat of the combustion exhaust gas in the furnace is stored in the heat storage body 2a of one burner 1a. As described above, the combustion of both burners 1a and 1b is alternately repeated.

[0007]

However, the above-mentioned conventional heat storage type combustor has the following problems. In other words, the conventional regenerative combustor has a large number of pipes and on-off valves, so that the equipment becomes large, the heat recovery efficiency is inferior, and the connection between the regenerator and the on-off valves becomes severe. Equipment design is greatly restricted.

Accordingly, an object of the present invention is to provide a regenerative combustor which can reduce the size of equipment.

[0009]

SUMMARY OF THE INVENTION The present invention has a pair of burners provided on a furnace wall for burning a combustion gas, and a heat storage member attached to each of the pair of burners. During the combustion of one burner, the combustion exhaust gas in the furnace is sucked into the other regenerator to heat the other regenerator, and then the combustion air is preheated by passing the combustion air through the other regenerator. In a regenerative combustor for supplying the preheated air to combustion of the other burner, each of the regenerators is constituted by a valve body having a large number of through holes formed in one direction, and each of the regenerators is a valve case. And a combustion air pipe and an exhaust gas suction pipe are connected to the valve box, respectively. By switching the heat storage body to the combustion air pipe side, combustion air passes through the through hole of the heat storage body. Through the burner On the other hand, by switching the heat storage body to the exhaust gas suction pipe side, the combustion exhaust gas in the furnace is discharged outside the furnace through the through hole of the heat storage body. is there.

[0010]

[Function] By providing the regenerator with a function as a switching valve between the combustion air side and the exhaust gas suction side, an on-off valve provided in the combustion air pipe and the exhaust gas suction pipe becomes unnecessary, so that the equipment can be downsized. And restrictions on equipment design are reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the regenerative combustor according to the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of a regenerative combustor according to the present invention. In FIG. 1, 1a and 1b are a pair of burners provided on the furnace wall 2, and 3a and 3b are burners 1a and 1b.
The on-off valves 10a, 10b attached in the middle of the fuel pipe 4 connected to the b are b. Has a function as a body.
A plurality of through holes 11a, 11b through which air and exhaust gas freely pass are formed in the heat storage bodies 10a, 10b between horizontal planes. 12a and 12b are the heat storage bodies 10a and 10
b is a spherical valve box in which b is housed. Valve box 12a, 12b
Is connected to a combustion air pipe 13 and an exhaust gas suction pipe 14. Further, pipes 15a, 15b connected to the burners 1a, 1b are connected to positions of the valve boxes 12a, 12b facing the exhaust gas suction pipe 14, and pipes 15a, 15b are connected to the positions facing the combustion air pipe 13. Pipes 16a and 16b connected to 15b are connected.

The regenerative combustor of the present invention having the above-described structure operates as follows. That is, when one burner 1a is burning, the on-off valve 3a is opened and the on-off valve 3b is opened.
Is closed, and the heat storage body 10a is rotated to a position where the through hole 11a communicates with the combustion air pipe 13 and the pipe 16a. Thereby, fuel and combustion air are supplied to one burner 1a, and one burner 1a is brought into a combustion state. On the other hand, at the same time, the other heat storage body 10b is rotated in a direction in which the through hole 11b communicates the exhaust gas suction pipe 14 and the pipe 15b. Thereby, the high-temperature combustion exhaust gas in the furnace is discharged to the outside of the furnace through the other burner 1b and the regenerator 10b by the suction blower (not shown). Thereby, the sensible heat of the combustion exhaust gas is stored in the heat storage body 10b of the other burner 1b.

After a lapse of a predetermined time, the on-off valve 3a is closed, the on-off valve 3b is opened, and the heat storage body 1 of the other burner 1b is opened.
0b, the through hole 11b is connected to the combustion air pipe 13 and the pipe 1
6b. At the same time, the heat storage body 10a of one burner 1a is rotated in a direction in which the through hole 11a communicates the exhaust gas suction pipe 14 and the pipe 15a. As a result, fuel and combustion air are supplied to the other burner 1b, and the other burner 1b enters a combustion state. The combustion air is preheated by passing through the heated regenerator 10b of the other burner 1b. The high-temperature preheated air is used for combustion of the other burner 1b. During this time, the sensible heat of the combustion exhaust gas in the furnace is stored in the heat storage body 10a of one burner 1a. As described above, the combustion of both burners 1a and 1b is alternately repeated.

[0015]

As described above, according to the present invention, the function as a switching valve between the combustion air side and the exhaust gas suction side is provided to the heat storage body, so that the heat storage body is provided in the combustion air pipe and the exhaust gas suction pipe. Since an on-off valve to be provided becomes unnecessary, useful effects such as downsizing of equipment and reduction of restrictions on equipment design are brought about.

[Brief description of the drawings]

FIG. 1 is a sectional view of a regenerative combustor according to the present invention.

FIG. 2 is a cross-sectional view of a conventional regenerative combustor.

[Explanation of symbols]

 1a, 1b: burner, 2: furnace wall, 3a, 3b: on-off valve, 4: fuel pipe, 5a, 5b: on-off valve, 6: combustion air pipe, 7a, 7b: on-off valve, 8: combustion exhaust pipe, 9 : Suction blower, 10a, 10b: heat storage, 11a, 11b: hole, 12a, 12b: valve box, 13: combustion air piping, 14: exhaust gas suction piping, 15a, 15b: piping, 16a, 16b: piping.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-64-75815 (JP, A) JP-A-63-159622 (JP, U) JP-A-63-159618 (JP, U) 33826 (JP, U) Hira 4-33825 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F23D 14/66 F23L 15/02

Claims (1)

(57) [Claims] 1. A burner for burning combustion gas, comprising: a pair of burners provided on a furnace wall; and a regenerator attached to each of the pair of burners. The combustion exhaust gas in the furnace is sucked into the other regenerator to heat the other regenerator, and then the combustion air is passed through the other regenerator to preheat the combustion air, and the preheated air is supplied to the other burner. In the heat storage type combustor provided for the combustion of the above, each of the heat storage bodies is constituted by a valve body having a large number of through holes formed in one direction, and each of the heat storage bodies is housed in a valve box, and the valve box A combustion air pipe and an exhaust gas suction pipe are connected to each other, and by switching the heat storage to the combustion air pipe side, combustion air is supplied to the burner through the through hole of the heat storage. ,
On the other hand, by switching the heat storage body to the exhaust gas suction pipe side, the combustion exhaust gas in the furnace is discharged outside the furnace through the through hole of the heat storage body.