JPH09159146A - Method for replacing heat storage unit while maintaining temperature distribution of heat storage layer of regenerative burner and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to replace heat storage unit while maintaining the temperature distribution of the heat storage layer of a generative burner by discharging a small amount of the unit from a heat storage chamber at each time of lapse of time, introducing the small amount and replacing the unit while eliminating the collapse of the temperature distribution of the layer. SOLUTION: A heat storage unit 7 for constituting a heat storage layer 8 is discharged by each small amount from a heat storage chamber 1 at each time of lapse of time, the small amount is introduced, and the unit 7 is replaced while eliminating the collapse of the temperature distribution of the layer 8. For example, when a discharge valve 4 is opened for about 5 sec, the unit 7 is dropped for the time, and only the dropped amount is introduced from a heat storage chamber supplementing chamber 5 via a heat storage unit supply unit 6. When the valve 4 is formed in a conical shape, the discharge is smoothened. In this case, since the constitution of the storage chamber lower part 2 is formed in an inverted conical state, the entirety is lowered without irregularity, and the temperature distribution can be maintained. The valve 4 may be switched, for example, at each 30min irrespective of the heating or cooling of the unit 7 in the case of heat storage burning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage layer of a regenerative burner and a method and apparatus for replacing the heat storage body while maintaining the temperature distribution of the heat storage layer.

[0002]

2. Description of the Related Art In conventional regenerative burners,
Put the alumina balls etc. which are the heat storage body in the heat storage chamber,
By storing exhaust gas from the high temperature side there, heat is stored in the heat storage body,
This is an excellent technique in which high temperature preheated air can be obtained by causing combustion air to flow from the low temperature side and heat exchange between the heat storage body and the combustion air at that time.

[0003]

However, since the heat storage body plays a role of heat storage and also functions as a filter, it is necessary to frequently replace the heat storage body if the exhaust gas contains a large amount of dust or the like. That is, the dust in the exhaust gas causes the heat storage body to function as a filter to cause clogging of the heat storage unit, and the temperature of the exhaust gas decreases as the heat is transferred to the heat storage body while flowing between the heat storage bodies. , Volatilized in exhaust gas is deposited in a certain temperature range. Therefore, when heating an object to be heated including dust and volatilized material,
When the differential pressure exceeds the setting while constantly monitoring the differential pressure between the upper and lower sides of the heat storage body, the entire amount of the heat storage body in the heat storage chamber is replaced. Also, when exchanging the heat storage body, manually and while burning the regenerative burners one by one,
The exchange took about 30 minutes. Therefore, when there are many dusts and volatilized substances from the object to be heated, it is necessary to frequently exchange the heat storage body, which is actually unsuitable for such heating. Furthermore, what is important is that the heat storage layer has a temperature difference of about 700 ° C. between the top and the bottom thereof, and this temperature difference is the essence of the heat storage layer. Therefore, if this temperature distribution is destroyed, the function as a heat storage layer is reduced.

[0004]

In order to solve the above-mentioned problems, according to the present invention, the temperature of the heat storage layer is reduced by discharging a small amount of a heat storage material constituting the heat storage layer from the heat storage chamber and inputting a small amount thereof with each passage of time. Disclosed is a method for replacing a heat storage body while maintaining a temperature distribution of a heat storage layer of a regenerative burner, which is characterized in that a heat storage body in a heat storage chamber is replaced while keeping a distribution.

In order to solve the above-mentioned problems, the present invention comprises a lower part of the heat storage chamber having an inverted conical shape, a discharge port provided at the bottom thereof, a discharge valve provided at the discharge port, and the heat storage chamber upper part. A heat storage medium replenishing chamber is provided outside the heat storage medium, and the heat storage chamber and the heat storage medium replenishing chamber are communicated with each other by a heat storage medium supply unit, while maintaining the temperature distribution of the heat storage layer of the regenerative burner. To provide a device for replacing

In order to solve the above-mentioned problems, the present invention replaces the heat storage body while maintaining the temperature distribution of the heat storage layer of the regenerative burner, which is characterized in that the discharge valve is formed in an inverted conical shape. A device is provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 is a heat storage chamber, 2 is a lower portion of the heat storage chamber 2 formed into an inverted conical shape composed of an air flow bed 15, and an outlet 3 is provided at the bottom thereof. A discharge valve 4 is provided at the discharge port 3. A heat storage medium replenishing chamber 5 is provided outside the upper portion of the heat storage chamber 1, and the heat storage chamber 1 and the heat storage medium replenishing chamber 5 are connected by a heat storage medium supply unit 6. The discharge valve 4 is formed in a conical shape so as to come into contact with the discharge port 3 or be slightly larger than the diameter of the heat storage body 7 and separated from the discharge port 3.

The temperature of the top portion 9 of the heat storage layer 8 is, for example,
When heated to 950 ° C., the temperature of the bottom 10 is 200
The temperature of the top portion 9 becomes 90 ° C. after cooling.
When the temperature is 0 ° C., the temperature of the bottom portion 10 is 150 ° C.
Since the heat storage layer 8 exhibits its function only after having this temperature distribution, the temperature distribution must be maintained. On the other hand, the heat storage body 7 must be replaced for the above-mentioned reason. That is, the most effective heat storage combustion can be achieved by exchanging the heat storage body 7 while maintaining the temperature distribution of the heat storage layer 8.

Therefore, the heat storage body 7 constituting the heat storage layer 8 is discharged from the heat storage chamber 1 in small amounts each time, and the heat storage body 7 is exchanged while keeping the temperature distribution of the heat storage layer 8 in a small amount. Of. When the discharge valve 4 is set to about 5 seconds, the heat storage body 7 falls for that time, and the fall amount is supplied from the heat storage chamber replenishing chamber 5 via the heat storage body supply unit 6. When the discharge valve 4 has a conical shape, the discharge is smoothly performed. At this time, since the configuration of the lower part 2 of the heat storage chamber has an inverted conical shape, the whole of the heat storage chamber lowers slightly and the temperature distribution can be maintained. Opening and closing of the discharge valve 4 may be performed, for example, every 30 minutes, regardless of whether the heat storage body is heated or cooled during heat storage combustion.

A pair of regenerative burners A and B installed on both sides of the furnace body 11 alternately supply high temperature preheated air to the furnace interior 12 for combustion in the furnace as shown by solid line arrows and broken line arrows in the figure. Contribute. That is, in the regenerative burner A, fresh air is introduced from the air supply / exhaust unit 13 as shown by the solid line arrow in the figure, heated by the heat storage body 7, and becomes hot preheated air as shown by the arrow. It is ejected from the portion 14 into the furnace 12 and contributes to combustion in the furnace. The combustion gas in the furnace 12 is guided by the regenerative burner B to heat the heat storage body 7, and then discharged from the air supply / exhaust unit 15, as shown by the arrow in the figure. The jetting portion 14 of the regenerative burners A and B may be provided with a flame holding mechanism, or fuel and air may be jetted separately into the furnace 12 and mixed combustion with high temperature preheated air in the furnace 12 may be performed. Good. After the flow indicated by the solid line arrow in the figure is performed for 60 seconds, for example, the flow indicated by the broken line in the figure is performed for 60 seconds, and this is repeated.

[0011]

As described above, the present invention has the following effects. By discharging the heat storage material little by little over time, the regenerative burner can be replaced without affecting the temperature gradient in the heat storage material during operation. Also, by dropping the regenerator from various positions evenly, it is possible to prevent the regenerator from sticking to the regenerator due to dust and volatilized substances inside the heat storage chamber, and to use a regenerative burner when heating a heated object that contains a lot of dust and volatilized substances. Can be used.
The control when replenishing the heat storage body can be performed by the time of opening and closing the discharge valve. Further, it becomes possible to automatically replace the heat storage body, which has been done manually until now. The heat storage body can be replaced without breaking the temperature gradient of the heat storage body.

[Brief description of the drawings]

FIG. 1 is a systematic cross-sectional explanatory view of the whole of the present invention.

FIG. 2 is an explanatory diagram of an enlarged main part.

[Explanation of symbols]

 A, B Regenerative burner 1 Heat storage chamber 2 Lower part of heat storage chamber 3 Discharge port 4 Discharge valve 5 Heat storage medium replenishment chamber 6 Heat storage medium supply unit 7 Heat storage medium 8 Heat storage layer 9 Top 10 Bottom 11 Furnace body 12 Furnace 13 Air supply / exhaust unit 14 Spout

[Procedure amendment]

[Submission date] March 27, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Added

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a system cross-sectional explanatory view of the entire present invention.

[Explanation of Codes] A, B Regenerative burner 1 Heat storage chamber 2 Heat storage chamber lower part 3 Discharge port 4 Discharge valve 5 Heat storage body replenishment chamber 6 Heat storage body supply part 7 Heat storage body 8 Heat storage layer 9 Top 10 Furnace body 12 Furnace 13 Air supply / exhaust section 14 Jet section 15 Air flow bed

Claims (3)

[Claims] 1. A heat storage material constituting a heat storage layer is replaced with a small amount of heat storage material discharged from the heat storage chamber and a small amount of the heat storage material is charged into the heat storage layer so as not to destroy the temperature distribution of the heat storage layer. The method for replacing the heat storage body while maintaining the temperature distribution in the heat storage layer of the regenerative burner, characterized in that 2. A lower part of the heat storage chamber is formed in an inverted conical shape, a discharge port is provided at its bottom, a discharge valve is provided at the discharge port, and a heat storage medium replenishing chamber is provided outside the upper part of the heat storage chamber. An apparatus for replacing a heat storage body while maintaining a temperature distribution of a heat storage layer of a regenerative burner, characterized in that the heat storage chamber and the heat storage body replenishing chamber are communicated with each other by a heat storage body supply unit. 3. The device for replacing the heat storage body while maintaining the temperature distribution of the heat storage layer of the regenerative burner according to claim 2, wherein the discharge valve has a reverse conical shape.