Modularized kiln heating body

Abstract

The utility model relates to a modular kiln heating body, which mainly comprises a heating element, the outer edge of the heating element is provided with an insulating protective layer which is sintered by heat-resistant ceramic materials and has a predetermined shape, and the inner edge of the insulating protective layer is provided with a heat-conducting layer which has a predetermined shape and is made of heat-conducting refractory materials, so that the heating body is formed. The inner edge, opposite to the heating face of the kiln, of the heating body is a heating space, a heat insulation fireproof layer made of heat insulation fireproof materials is arranged between the heating body and the kiln body, and the heating element heats the heat conduction layer to enable the heating body to emit heat. According to the utility model, the single module heating body can be combined at the preset position in the kiln according to the actual requirement, and each module heating body is an independent power supply to control the respective temperature, so that the effect of controlling the respective temperature in the kiln is achieved; and the effects of avoiding collision damage and electrification of the heating element, avoiding pollution and erosion caused by volatile matters generated by sintering in the kiln and shortening the service life, and avoiding oxidation of the heating element and the heat-conducting refractory material and shortening the service life are achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of heating elements for kilns, and specifically refers to a modular kiln heating element. Background Technology

[0002] Currently, in existing kilns, the heating element's heat-insulating refractory material is fixed inside the kiln body (e.g., by digging grooves in the heat-insulating refractory material to fix the heating element or by fixing the heating element directly to the heat-insulating refractory material). Except for the fixed portion at the contact surface with the heat-insulating refractory material, the rest of the heating element's surface is exposed inside the kiln. During sintering, if the sintered material collapses, other gases are added (such as atmospheric gases), or other accidents occur, the collapsed sintered material can crush or damage the exposed heating element. Long-term contact between the volatiles generated during sintering inside the kiln and the atmospheric environment can cause pollution and corrosion to the heating element, shortening its lifespan. If the outer edge of the sintered material is covered with a metal cover, contact between the metal cover and the damaged heating element can cause electric shock to operators. All of these factors can potentially damage the heating element, shorten its lifespan, or cause electric shock accidents. Existing technology involves covering the heating element with a quartz tube; however, the quartz tube itself has poor ductility, is difficult to bend, is easily damaged, and is expensive, which are drawbacks. As mentioned above, the method of fixing the heating element by cutting grooves in the heat-insulating refractory material has limitations. The area of ​​the exposed heating element is limited, and the contact area with the heat-insulating refractory material cannot dissipate heat, thus contributing nothing to heating. Therefore, the area of ​​the heating element that can be heated is also limited. Furthermore, with existing exposed heating elements, the temperature inside the furnace is higher in directly heated areas and lower in areas farther away, resulting in uneven heating (sintering) temperatures. In order to raise the furnace temperature, the directly heated areas are prone to overheating, causing the heating element to burn out. Moreover, in existing kilns, the heating elements are continuously arranged around the inside of the kiln, making it impossible to control the temperature of a specific location. This cannot meet the practical needs of certain processes that require precise temperature control within the furnace. Utility Model Content

[0003] The main purpose of this invention is to provide a modular kiln heating element with an insulating protective layer and a heat-insulating refractory layer, in order to solve at least one of the problems in the background art.

[0004] The modular kiln heating element of this utility model mainly includes a heating element, the outer edge of which has an insulating protective layer, and the inner edge of which has a heat-conducting layer. The heating element, the insulating protective layer and the heat-conducting layer constitute the heating body, and the inner edge of the heating body relative to the heating surface of the kiln is the heating space.

[0005] Optionally, the outer edge of the heating element has an insulating protective layer of a predetermined shape sintered from heat-resistant ceramic material, and the inner edge of the insulating protective layer has a heat-conducting layer of a predetermined shape made of thermally conductive refractory material, thus forming a heating body. The heating body has a heating space relative to the inner edge of the kiln heating surface. Between the heating body and the kiln body, there is a heat-insulating refractory layer made of thermally insulating refractory material. The heating element heats the thermally conductive layer, thereby heating the heating body. In addition to the function of controlling the individual temperatures in the furnace, it also has the functions of preventing the heating element from being damaged by collision, being electrically charged, and preventing pollution and corrosion caused by long-term contact between the volatiles and atmospheric environment generated during sintering in the kiln, which would shorten its lifespan. Furthermore, it also has the functions of preventing oxidation caused by long-term contact between the heating element and the thermally conductive refractory material, which would also shorten its lifespan.

[0006] The aforementioned heat-conducting layer of this invention can be constructed with different heat-conducting refractory materials depending on the material to be sintered, so as to release a heating wavelength range suitable for the element to be sintered, thereby improving the sintering quality and speed.

[0007] The aforementioned heating element of this invention is prefabricated as a single modular heating element, and then an appropriate number of modular heating elements are combined in a predetermined position in the kiln according to actual needs.

[0008] Each modular heating element of this invention has an independent power supply to control its own temperature, and can adjust the temperature inside the furnace according to actual needs.

[0009] In addition to controlling the temperature of each part of the furnace, it also prevents the heating element from being damaged by collision, from being electrocuted, and from being contaminated or corroded by the volatiles and atmosphere generated during sintering in the kiln, which would shorten its lifespan. Furthermore, it prevents the heating element from being oxidized and shortened its lifespan due to prolonged contact with the thermally conductive refractory material. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of the heating element of this utility model;

[0011] Figure 2A This is a cross-sectional view of an embodiment of the present invention actually combined in a kiln;

[0012] Figure 2B This is a front view of an embodiment of the present invention actually combined with a kiln.

[0013] In the picture:

[0014] 1: Heating element; 10: Heating component; 11: Insulation layer; 12: Heat-conducting layer; 13: Heating space; 2: Kiln; 20: Heat-insulating refractory layer. Detailed Implementation

[0015] To achieve the aforementioned objectives and technical means of this utility model, embodiments are listed below and described in conjunction with the accompanying drawings, so that a better understanding of the structure, features and effects achieved by this utility model can be obtained.

[0016] First, please refer to Figure 1 As shown, this utility model mainly includes a heating element 10. The outer edge of the heating element 10 has an insulating protective layer 11 of a predetermined shape sintered from a heat-resistant ceramic material (such as alumina, silicon dioxide, etc.). The insulating protective layer 11 mainly serves to fix the aforementioned heating element 10 and has the functions of protection and insulation. The inner edge of the insulating protective layer 11 is provided with a heat-conducting layer 12 of a predetermined shape made of a heat-conducting refractory material, thus forming a heating body 1 (the heating body 1 can be a predetermined shape such as circular, rectangular, or planar, and the heat-conducting refractory material is such as silicon carbide, alumina, zirconium oxide, etc.). The inner edge of the heating body 1 relative to the heating surface of the kiln 2 forms a heating space 13. Between the heating body 1 and the kiln 2, there is a heat-insulating refractory layer 20 made of a heat-insulating refractory material (please refer to the reference). Figure 1 , Figure 2A , Figure 2B Since the heating element 10 heats the heat-conducting layer 12, the heat-conducting layer 12 absorbs the heat from the heating element 10 and then releases it evenly, thus making the heating body 1 heat up evenly. Therefore, the heating temperature of the heating space 13 is quite uniform. Furthermore, since the heating element 10 is enclosed in the insulating protective layer 11, damage to the heating element 10 or electric shock accidents can be effectively avoided. Since the outer edge of the heating element 10 has an insulating protective layer 11, the insulating protective layer 11 mainly serves to fix the aforementioned heating element 10 and protect the heating element 10. The insulating protective layer 11 is an insulator and does not conduct electricity, which can effectively prevent the oxidation of the heating element 10 (because the refractory material itself contains impurities such as iron and oxygen, which will damage the heating element 10, affect the impedance, and thus reduce the service life; the volatiles and atmosphere generated by sintering in the kiln will cause pollution and corrosion to the heating element in the long term, thus shortening the service life. Moreover, since the insulating protective layer 11 is an insulator, a thermally conductive refractory material with better thermal conductivity can be used, such as graphite, silicon carbide, etc. Most of the existing thermally conductive refractory materials are oxides, so as to improve the thermal conductivity of the thermally conductive layer 12.

[0017] The aforementioned heat-conducting layer 12 of this invention can be made of different heat-conducting refractory materials depending on the material to be sintered, so as to release a heating wavelength range suitable for the material to be sintered, thereby improving the sintering quality and speed.

[0018] The aforementioned heating element 1 of this invention is prefabricated as a single modular unit, and then an appropriate number of modular heating elements 1 are assembled in predetermined positions within the kiln 2 as needed (see [link]). Figure 2A , Figure 2B The image shows a lifting furnace. In this embodiment, it has four sets of heating elements 1. This invention can also be used in other different types of kilns 2.

[0019] Each modular heating element 1 of this invention can be independently powered to control its own temperature. Depending on the requirements of the process environment of the element to be sintered, the temperature of different positions in the furnace can be adjusted or compensated to make the temperature of each part of the furnace the same.

[0020] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A modular kiln heating element, characterized in that, include: The heating element has an insulating protective layer on its outer edge and a heat-conducting layer on its inner edge. The heating element, the insulating protective layer and the heat-conducting layer constitute a heating body. The heating body has a heating space relative to the inner edge of the kiln heating surface.

2. The modular kiln heating element as described in claim 1, characterized in that, There is a heat-insulating refractory layer between the heating element and the kiln body.

3. The modular kiln heating element as described in claim 1, characterized in that, The heating element is a prefabricated modular heating element, with several modular heating elements assembled in predetermined positions within the kiln.

4. The modular kiln heating element as described in claim 1, characterized in that, Each of these modular heating elements is connected to an independent power supply.

5. The modular kiln heating element as described in claim 1, characterized in that, The insulating protective layer is made of heat-resistant ceramic material, and the thermally conductive layer is made of thermally conductive refractory material.

6. The modular kiln heating element as described in claim 2, characterized in that, The heat-insulating refractory layer is made of heat-insulating refractory material.

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