JP2937249B2 - High efficiency indirect heating furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a highly efficient indirect heating furnace.

[0002]

2. Description of the Related Art When an alternating combustion burner for alternately burning two burners having a heat storage unit as a set is provided in a muffle, the flow of the combustion gas is simply assumed as shown in FIG. In order to suction from the same direction as the flow direction, even if each burner is installed apart from each other, or as shown in FIG. 10, even if it is installed up and down, the suction side sucks from the same direction as the combustion gas flow direction. Was installed.

[0003]

In the above-mentioned conventional furnace, a portion indicated by a two-dot chain line becomes a dead space, and it is a major problem how to improve the dead space. There is a problem that the furnace itself becomes large and complicated.

[0004]

According to the present invention, in order to solve the above-mentioned problems, an alternating combustion burner for alternately burning two sets of burners each having a heat storage body is provided at an upper portion and a lower portion of a muffle. The upper and lower burners are installed and arranged such that the ejection and suction are in opposite directions.

Further, the present invention has a structure in which two burners each having a heat storage body are alternately burned as a set and alternate combustion burners are arranged in parallel in a muffle. It is characterized in that they are installed and arranged to be in opposite directions.

[0006]

The direction in which the combustion gas is circulated in the furnace is always the same even if the direction in which the combustion gas is ejected and the direction in which it is sucked are reversed, and the momentum is maintained without being canceled out. This allows
There is no dead space, and the furnace can be streamlined.

[0007]

FIG. 1 shows a vertical muffle furnace 1 with an alternating combustion burner 2.
An example in which is applied. That is, an alternating combustion burner 2 for alternately burning two burners A and B having a heat storage body 3 as a set is installed at the upper and lower portions of the vertical muffle furnace 1, and the manner of installation is determined by the upper and lower burners A And B are installed such that the ejection direction and the suction direction are opposite to each other. FIG. 2 is a cross-sectional explanatory view taken along line AA, and FIG. 3 is a cross-sectional explanatory view taken along line BB. FIG. 4 is a simulation of the combustion gas flow corresponding to FIG. 3, and FIG. 5 is a simulation of the combustion gas flow corresponding to FIG. For this reason, even if the ejection direction and the suction direction of the combustion gas are reversed, the flow of the combustion gas in the furnace circulates in the same direction, and the momentum is maintained without being offset. That is, even on the suction side, the flow of the combustion gas is maintained without being affected.

FIG. 6 and FIG. 7 show a case where a plurality of sets of alternating combustion burners 2 are installed in accordance with the length of the horizontal muffle furnace 5. Is also good. Reference numeral 4 denotes an object to be heated.

As shown in FIG. 8, the alternating combustion burner 2 is a set of two burners each having a heat storage body 3, and when one burner A is burning, the combustion gas is sucked from the other burner B. This is alternately performed by operating the valve 6. 7 is an air supply fan, 8 is an exhaust fan, 9 is a gas introduction unit, and 10 is an exhaust pipe.

[0010]

As described above, the present invention has no dead space, has extremely improved temperature distribution, and has a thermal efficiency of 30 to 30 by effectively disposing an alternating combustion burner using a heat storage element. 50% improvement. Furthermore, the unique arrangement of the alternating combustion burners simplifies the burner turning. In addition, there is an advantage that it can be applied to all muffle type indirect heating furnaces regardless of the batch type or the continuous type.

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view showing one embodiment of the furnace of the present invention.

FIG. 2 is a sectional view taken along line AA.

FIG. 3 is a sectional view taken along line BB.

FIG. 4 is a simulation diagram of a flow of a combustion gas corresponding to FIG. 2;

FIG. 5 is a simulation diagram of a flow of a combustion gas corresponding to FIG. 3;

FIG. 6 is an explanatory diagram when applied to a horizontal furnace.

FIG. 7 is an explanatory diagram when applied to a horizontal furnace.

FIG. 8 is an explanatory diagram of a system of an alternating combustion burner.

FIG. 9 is an explanatory view of a conventional burner.

FIG. 10 is an explanatory view of a conventional burner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Muffle 2 Alternating combustion burner 3 Heat storage body 4 Heated body 5 Horizontal furnace 6 Valve 7 Intake fan 8 Exhaust fan 9 Gas introduction part 10 Exhaust cylinder

Claims (2)

(57) [Claims] An alternating combustion burner for alternately burning two burners having a heat storage unit as a set is provided at an upper portion and a lower portion of a muffle, and the upper and lower burners have opposite ejection and suction. A high-efficiency indirect heating furnace characterized by being installed in the direction. 2. An alternating combustion burner for alternately burning two sets of burners each having a heat storage body as a set is arranged in parallel in a muffle, and the two burners are arranged so that ejection and suction are performed in opposite directions. A high-efficiency indirect heating furnace characterized by being installed and arranged as follows.