JP2023089329A - Introduced outside air heating method in combustion furnace and combustion furnace structure using the same method - Google Patents

Abstract

To provide a combustion furnace excellent in combustion efficiency.SOLUTION: Before outside air to be introduced into a combustion furnace as a hollow body made of a heat resistant material is introduced into the furnace, the outside air heated by passing through a heat exchange unit provided on an outer periphery of the furnace and having a baffle plate is introduced into the combustion furnace.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a method for heating outside air introduced into a combustion furnace and a combustion furnace structure using the heating method, in which outside air is heated and blown into the combustion furnace.

Conventionally, combustion furnaces have been widely used for various purposes, but as shown in the present invention, an introduction outside air heating type in which outside air heated by absorbing heat radiation from the combustion furnace wall is blown into the combustion furnace. A heating method and a combustion furnace structure using this heating method are not found at present.

In general, a combustion furnace is one in which an object to be burned, hot air, and aerobic gas for combustion are fed into a hollow body made of a refractory material for combustion. Conventionally, since outside air is directly introduced into the furnace, the temperature difference between the inside of the furnace and the outside air lowers the temperature inside the furnace due to the introduction of outside air, which causes the problem of requiring extra fuel.
In view of the above, the present invention has been invented for the purpose of providing a new and useful means capable of solving the above-mentioned problems by allowing outside air to come into contact with the outer surface of the furnace wall and prolonging the passage time. It is.

As means for solving the problems, the present invention has the following configuration. That is, one aspect of the present invention is
Outside air introduced into a combustion furnace as a hollow body made of a heat-resistant material is allowed to pass through a heat exchange section having baffles provided on the outer periphery of the furnace before being introduced into the furnace. A method for inducting outside air warming in a combustion furnace, characterized in that the resulting heated outside air is introduced into the combustion furnace. Another aspect of the present invention is to provide a combustion furnace as a hollow body made of a heat-resistant material, to provide a heat exchange section having a baffle on the outer periphery of the combustion furnace, and to place a burner, A combustion furnace structure using an introduced outside air heating method in a combustion furnace, characterized by providing a heated outside air combustion furnace in-furnace ejection part, a heated gas combustion outside combustion furnace discharge part, and a fuel object introduction part.

According to the present invention, the outside air is heated by absorbing the heat radiated from the outer wall of the combustion furnace, so that the temperature difference between the outside air entering the combustion furnace and the temperature inside the combustion furnace is reduced, and the combustion efficiency is improved. can be increased and fuel usage can be reduced.
In addition, the inside of the combustion furnace becomes a swirling flow, and the combustion object can be kept in the furnace for a longer period of time.

Structural explanatory diagram of the present invention (CC cross section) Structural explanatory drawing of the present invention (central longitudinal section in front view) Structural explanatory diagram of the present invention (BB cross section) Structure explanatory drawing of the present invention Structural explanatory diagram of the present invention (AA cross section) Burner position explanatory drawing of the present invention Explanatory drawing of the heat exchanging part of the present invention

Embodiments of the present invention will be described below.
In the figure, reference numeral 1 denotes a combustion furnace body, which is made of a refractory material and formed into a hollow columnar shape. Reference numeral 2 denotes a lid portion attached to the upper portion of the combustion furnace, and 3 denotes an opening/closing door provided on the side surface of the combustion furnace.
Reference numeral 4 denotes a heat exchange section provided on the outer circumference of the combustion furnace, which is divided into upper and lower two stages, and has the following structure. As shown in FIG. 2, an outer plate 5 is provided at a predetermined distance from the outer wall of the combustion furnace via an appropriate supporting member. A plurality of baffle plates 6 are provided. The baffle is positioned such that the gas passageway is serpentine.
Reference numeral 11 denotes a combustion object introduction portion, and 12 and 13 denotes injection portions in the heated open-air combustion furnace.

In this heated outside air combustion in-furnace injection part 12, the outside air entered from the outside air intake port 14 shown in FIG. Fumarole into the furnace. Similarly, the warmed outside air combustion furnace injection part 13 enters from the outside air intake port 16 shown in FIG. .
In FIG. 7, reference numeral 18 denotes an opening/closing door portion, 19 a combustion object introduction portion, 20 a burner portion, and 21 and 22 cutout portions provided for injection portions in the heated open air combustion furnace.

As shown in FIGS. 1 and 2, the heated outside air jetting section has the same height and is arranged at a predetermined angle with respect to the main body of the combustion furnace in plan view. That is, the heated outside air combustion furnace in-furnace ejection part 12 ejects in a direction close to the combustion furnace inner wall. The warmed outside air combustion furnace in-furnace jet part 13 jets toward the vicinity of the center of the combustion furnace. The above is an embodiment of the present invention.

The use of the invention will now be described.
Outside air enters the heat exchange section through the outside air intake ports 14 and 16 of the heat exchange section when the fan is driven. The air that has entered the heat exchange section passes through the heat exchange section and is jetted into the combustion furnace from the hot outside air combustion furnace ejection section. On the other hand, an object to be burned is sent into the furnace from the object to be burned introduction portion and discharged to the outside from the discharge portion 32 to the outside of the heated gas combustion furnace.
Since the heat exchange section is provided with a baffle plate as described above, the outside air entering the heat exchange section meanders without going straight to the jetting section in the heated gas combustion furnace. Since it circulates in the heat exchange section, the outside air can be heated up to a desired temperature by sufficient heat exchange. In addition, since the temperature in the furnace can be maintained by the heat generated by the combustion of the combustion target, constant operation of the burner is unnecessary.

The present invention has been described above, and the present invention increases the combustion efficiency compared to the conventional method by the above-described means, and enables combustion with less fuel.
It should be noted that what has already been described is an example of implementation, and other similar configurations may be used.
As described above, the present invention provides a novel and useful combustion means that has never existed before.

1 Combustion furnace body 2 Lid 3 Open/close door 4 Heat exchange part 5 Outer plate 6 Baffle plate 11 Combustion object introduction part 12 Heated outside air combustion furnace injection part 12a Nozzle 13 Heated outside air combustion furnace injection part 13a Nozzle 14 Outside air Inlet 15 Warmed outside air outlet 16 Outside air intake 17 Warmed outside air outlet 18 Opening/closing lid portion 19 Combustion target introduction portion 20 Burner portion 21 Warmed outside air combustion furnace ejection location 22 Warmed outside air combustion furnace ejection location 32 Heated gas combustion furnace outside discharge part 33 Heated gas combustion furnace outside discharge part

Claims (2)

Outside air introduced into a combustion furnace as a hollow body made of a heat-resistant material is allowed to pass through a heat exchange section having baffles provided on the outer periphery of the furnace before being introduced into the furnace. A method for inducting outside air warming in a combustion furnace, characterized by introducing the resulting warmed outside air into the combustion furnace. A combustion furnace is provided as a hollow body made of a heat-resistant material, and a heat exchange section having baffles is provided on the outer circumference of the combustion furnace, and a burner, a heated external air combustion furnace ejection section, 1. A combustion furnace structure using an introduction outside air heating method in a combustion furnace, characterized in that a heated gas discharge part and a fuel object introduction part are respectively provided.

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