Combustion furnace structure using the external air heating method

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]

[0001] The present invention relates to a combustion furnace structure using an introduced outside air heating method in a combustion furnace, in which outside air is heated and blown into the combustion furnace. [Background technology]

[0002] Conventionally, combustion furnaces have been widely used for various purposes, but as shown in the present invention, there are currently no combustion furnace structures that use the introduced outside air heating method of blowing heated outside air into the combustion furnace by absorbing heat radiated from the furnace wall. Summary of the Invention [Problem to be solved by the invention]

[0003] Generally, a combustion furnace is a hollow structure made of refractory material into which the material to be burned, hot air, and oxygen-containing gas for combustion are introduced to burn the material. Conventionally, outside air is introduced directly into the furnace, which causes a temperature difference between the inside of the furnace and the outside air, lowering the temperature inside the furnace due to the introduced outside air, which creates the problem of requiring extra fuel. In view of the above, the present invention has been invented with the object of providing a new and useful means for solving the above problems by bringing the outside air into contact with the outer surface of the furnace wall and lengthening the time for which it passes through. [Means for solving the problem]

[0004] As a means for solving the problems, the present invention has the following configuration. A combustion furnace is provided as a hollow body made of a heat-resistant material, and the following is provided around the periphery of the combustion furnace: To warm the introduced outside air A heat exchange section having a baffle plate is provided, and a burner, a heated outside air combustion furnace inlet section, a heated gas combustion furnace outlet section, and an introduction section for the material to be burned are provided at appropriate locations in the furnace. The outside air that has entered the heat exchange section is heated and then blown into the combustion furnace from the heated outside air blowout section into the combustion furnace. Two heated outside air jetting sections are provided in the combustion furnace, one of which jets out in a direction close to the inner wall of the combustion furnace, and the other of which jets out in a direction close to the center of the combustion furnace. The present invention is a combustion furnace structure using the introduced outside air heating method in a combustion furnace, characterized by the above-mentioned configuration. [Effects of the Invention]

[0005] According to the present invention, the heat radiated from the outer wall of the combustion furnace is absorbed by the introduced outside air and heated, thereby reducing the difference between the temperature of the outside air entering the combustion furnace and the temperature inside the combustion furnace, thereby improving combustion efficiency and reducing the amount of fuel used. In addition, a swirling flow occurs inside the combustion furnace, which increases the time that the material to be burned remains inside the furnace, thereby improving combustion efficiency compared to conventional products. [Brief explanation of the drawings]

[0006] [Figure 1] Structural diagram of the present invention (CC cross section) [Figure 2] Explaining the structure of the present invention (front view, central vertical cross section) [Figure 3] Structural illustration of the present invention (BB cross section) [Figure 4] Structural illustration of the present invention [Figure 5] Structural diagram of the present invention (AA cross section) [Figure 6] Illustrative diagram of the burner position of the present invention [Figure 7] An exploded view of the heat exchanger of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0007] Hereinafter, an embodiment of the present invention will be described. In the figure, 1 is the combustion furnace body, which is made of refractory material and has a hollow cylindrical shape. 2 is a lid attached to the top of the combustion furnace, and 3 is an opening and closing door attached to the side of the combustion furnace. Reference numeral 4 denotes a heat exchanger divided into upper and lower stages, which is installed on the periphery of the combustion furnace and has the following configuration: As shown in Fig. 2, an outer plate 5 is installed at a predetermined distance from the outer wall of the combustion furnace via appropriate support members, and multiple baffle plates 6, shown in Fig. 7 (developed view), are installed between this outer plate and the outer wall of the combustion furnace. These baffle plates are positioned so that the gas passage is serpentine. Reference numeral 11 denotes an introduction section for the material to be burned, and 12 and 13 denote heated outside air ejection sections into the combustion furnace.

[0008] In this heated outside air combustion furnace injection section 12, outside air enters through an outside air intake 14 shown in Figure 7, is heated, and exits through heated outside air outlet 15, passes through a duct with a fan, and is injected into the combustion furnace from nozzle 12a. Similarly, in the heated outside air combustion furnace injection section 13, outside air enters through an outside air intake 16 shown in Figure 7, is heated, and exits through heated outside air outlet 17, passes through a duct with a fan, and is injected from nozzle 13a. In FIG. 7, 18 denotes the opening and closing door, 19 denotes the introduction point of the material to be burned, 20 denotes the burner, and 21 and 22 denote cutouts for the heated outside air ejection points into the furnace.

[0009] As shown in Figures 1 and 2, the heated outside air outlets are at the same height and are arranged at a predetermined angle relative to the combustion furnace body in a plan view. That is, heated outside air outlet 12 for combustion furnace interior is directed toward the furnace inner wall. Heated outside air outlet 13 for combustion furnace interior is directed toward the center of the combustion furnace. This completes one embodiment of the present invention.

[0010] Next, the use of the present invention will be described. Outside air enters the heat exchanger through the outside air intakes 14 and 16 driven by a fan. The air passes through the heat exchanger and is blown into the combustion furnace through the heated outside air combustion furnace outlet. Meanwhile, the material to be burned is sent into the furnace through the material introduction port and is discharged to the outside through the heated gas combustion furnace outlet 32. As mentioned above, the heat exchanger is equipped with a baffle plate, so that the outside air that enters the heat exchanger meanders rather than going directly to the heated gas outlet in the furnace, circulating within the heat exchanger for a predetermined period of time, allowing sufficient heat exchange to heat the outside air to the desired temperature. Furthermore, the heat generated by the combustion of the material to be burned can be used to maintain the furnace temperature, eliminating the need for constant burner operation.

[0011] The present invention has been described above. By using the means already described, the present invention improves combustion efficiency compared to conventional methods, and enables combustion with less fuel. The above-described embodiment is merely an example, and other similar configurations may be used. As described above, the present invention provides a novel and useful combustion means that has not been previously available. [Explanation of symbols]

[0012] 1. Combustion furnace body 2 Lid 3 Opening and closing doors 4 Heat exchange section 5. Outer panel 6 Baffle board 11. Combustion object introduction section 12. Heated air combustion furnace outlet 12a nozzle 13 Heated outside air combustion furnace outlet 13a Nozzle 14 Fresh air intake 15 Heated outside air outlet 16 Fresh air intake 17 Heated outside air outlet 18 Opening and closing lid 19. Place where combustion objects are introduced 20 burner locations 21. Heated outdoor air combustion furnace ejection point 22. Heated outdoor air combustion furnace ejection point 32 Heated gas combustion furnace external exhaust section 33. Location of heated gas discharge outside combustion furnace

Claims

[Claim 1] A combustion furnace structure using an introduced outside air heating method in a combustion furnace is provided, which is a hollow body made of heat-resistant material, and a heat exchange section with a baffle plate for heating the introduced outside air is provided on the outer periphery of the combustion furnace, and a burner, a heated outside air combustion furnace interior outlet, a heated gas combustion furnace exterior outlet, and a combustion object introduction section are each provided in appropriate locations on the furnace, the outside air that enters the heat exchange section is heated and ejected into the combustion furnace from the heated outside air combustion furnace interior outlet, and two heated outside air combustion furnace interior outlets are provided, one of which ejects in a direction close to the inner wall of the combustion furnace and the other ejects in a direction near the center of the combustion furnace, characterized by the above configuration.

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