Electromagnetic kiln for foaming ceramic plate firing

Abstract

The utility model relates to an electromagnetic kiln for foaming ceramic plate firing, which comprises a kiln main body formed by sequentially connecting a plurality of sections of kiln bodies, and a fire-resistant thermal insulation layer is arranged in the kiln main body; a hollow cavity used for foaming ceramic plate firing is formed in the fireproof heat preservation layer, a sagger used for containing foaming ceramic plate raw materials is arranged in the hollow cavity in a sliding mode, and a plurality of first electromagnetic coils are arranged at the bottom of the hollow cavity in the length direction of the kiln body. And a first heat insulation plate located above the first electromagnetic coil is arranged in the hollow cavity. According to the kiln, foaming ceramic raw materials contained in the saggar can be rapidly heated and calcined through the kiln body, the fire-resistant heat preservation layer, the hollow cavity, the first electromagnetic coil, the first heat insulation plate and the electromagnetic heating controller, and efficient heat conduction is achieved; heat dissipation in the heating process is reduced, so that the whole firing process is high in heat efficiency and short in processing time, waste gas generated in the combustion process is reduced, and the use is more environment-friendly.

Description

Technical Field

[0001] The present application relates to the technical field of firing production of foamed ceramic plates, and in particular to an electromagnetic kiln for firing foamed ceramic plates. Background Art

[0002] Foamed ceramic insulation board is made of solid waste and other raw materials through high-temperature firing. It is a new type of environmentally friendly building material and has been widely used in the fields of building wall panels and decoration.

[0003] Existing foamed ceramic panels are usually fired in gas-fired tunnel kilns or gas-fired roller kilns. The raw materials are crystallized, foamed, and sintered under specific thermal process conditions. Specifically, the raw materials are placed in a sagger, which is placed on a kiln car or an electric drive roller covered with refractory materials. The raw materials are arranged front and back together and sequentially go through preheating, heating, constant temperature, rapid cooling, slow cooling and other sections in the kiln body along the track or roller, and finally fired and formed. The preheating, heating, and constant temperature of the tunnel kiln or roller kiln require heat provided by gas combustion.

[0004] At present, the sintering temperature of foamed ceramic plates is as high as 1200°. A large amount of gas is consumed during the firing process, which results in high energy consumption. In addition, a large amount of carbon dioxide and nitrogen oxides will be produced during the combustion of the gas. These flue gases will also take away a large amount of heat when discharged, resulting in heat dissipation. As a result, the traditional gas firing method not only has a low combustion thermal efficiency, but also a large amount of carbon dioxide emissions will pollute the environment.

[0005] In view of the above problems, an electromagnetic kiln for firing foamed ceramic plates is now designed. Utility Model Content

[0006] The embodiment of the present application provides an electromagnetic kiln for firing foamed ceramic panels to solve the problems of low thermal efficiency and high carbon emissions during firing in gas kilns in the related art.

[0007] In a first aspect, an electromagnetic kiln for firing a foamed ceramic plate is provided, comprising:

[0008] The kiln body is formed by connecting several kiln sections in sequence, and a refractory insulation layer is arranged inside the kiln body;

[0009] A hollow chamber for firing the foamed ceramic plate is provided inside the refractory insulation layer, a sagger for accommodating the raw materials of the foamed ceramic plate is slidably provided inside the hollow chamber, a plurality of electromagnetic coils are provided at the bottom of the hollow chamber along the length of the kiln body, and a heat insulation board is provided inside the hollow chamber above the electromagnetic coil for heat insulation of the electromagnetic coil;

[0010] The kiln body is provided with a plurality of electromagnetic heating controllers, which are respectively connected to corresponding electromagnetic coils 1 and are used to control the electromagnetic coils 1 to generate high-frequency, high-voltage alternating current to heat the sagger.

[0011] In some embodiments, the hollow chamber is provided with a preheating section, a high temperature section and a firing section in sequence along the length of the kiln body;

[0012] The electromagnetic coil 1 and the heat insulation plate 1 are located inside the preheating section and the high temperature section.

[0013] In some embodiments, electromagnetic coil 2, heat insulation plate 2 and heat radiation plate are sequentially arranged inside the high temperature section from top to bottom, and the heat insulation plate 2 is used for heat insulation of the electromagnetic coil 2. The electromagnetic heating controller is connected to the electromagnetic coil 2 and is used to heat the heat radiation plate. The heat radiation plate is used to generate heat radiation.

[0014] In some embodiments, grooves are relatively opened at the bottom of the hollow chamber, bearings are relatively rotatably arranged inside the grooves, a roller is rotatably arranged between two adjacent bearings, and the tops of the two rollers are slidably matched with the sagger.

[0015] In some embodiments, a cushion block is disposed opposite to the bottom of the sagger, and the cushion block abuts against the corresponding roller rod.

[0016] In some embodiments, a plurality of thermocouple temperature sensors are further included, and the plurality of thermocouple temperature sensors are sequentially arranged inside the hollow chamber along the length direction of the kiln body. One end of the thermocouple temperature sensor extends to the outside of the kiln body and is connected to the electromagnetic heating controller for controlling the temperature inside the hollow chamber.

[0017] In some embodiments, a driving member is further included, wherein the driving member is disposed at one end of the hollow chamber close to the preheating section, and the driving member is used to push the sagger forward.

[0018] The embodiment of the present application provides an electromagnetic kiln for firing foamed ceramic panels. Through the kiln body, refractory insulation layer, hollow chamber, electromagnetic coil 1, heat insulation board 1 and electromagnetic heating controller, the foamed ceramic raw materials contained in the sagger can be quickly heated and calcined, thereby achieving efficient heat conduction and reducing heat dissipation during the heating process, so that the entire firing process has high thermal efficiency, short processing time, low energy consumption, and reduces waste gas generated during the combustion process, making it more environmentally friendly to use.

[0019] In addition, this method also eliminates the need for a gas combustion system and the required supporting piping system, making the kiln structure compact and greatly saving the construction cost of the kiln. It also reduces the investment in flue gas collection and environmental emission treatment equipment, and reduces the direct production cost of foamed ceramic panels. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A sectional view of a three-dimensional structure provided in an embodiment of the present application;

[0022] Figure 2 A left side cross-sectional view provided for an embodiment of the present application;

[0023] Figure 3 A front cross-sectional view provided for an embodiment of the present application;

[0024] Figure 4 A three-dimensional schematic diagram of the sagger and pad connection structure provided in an embodiment of the present application.

[0025] In the figure: 001, kiln body; 002, refractory insulation layer; 003, electromagnetic coil 2; 004, insulation board 2; 005, heat radiation board; 006, hollow chamber; 0061, preheating section; 0062, high temperature section; 0063, firing section; 007, driving part; 008, groove; 009, sagger; 010, insulation board 1; 011, electromagnetic coil 1; 012, pad; 013, roller; 014, bearing; 015, electromagnetic heating controller; 016, thermocouple temperature sensor. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] The embodiment of the present application provides an electromagnetic kiln for firing foamed ceramic panels, which can solve the problems of low thermal efficiency and high carbon emissions during firing in gas kilns in related technologies.

[0028] See also Figure 1-Figure 3An electromagnetic kiln for firing foamed ceramic plates comprises: a kiln main body 001 formed by connecting a plurality of kiln sections in sequence, wherein a refractory heat-insulating layer 002 is arranged inside the kiln main body; a hollow chamber 006 for firing foamed ceramic plates is arranged inside the refractory heat-insulating layer 002, a sagger 009 for accommodating raw materials of foamed ceramic plates is slidably arranged inside the hollow chamber 006, a plurality of electromagnetic coils 011 are arranged at the bottom of the hollow chamber 006 along the length direction of the kiln main body 001, a heat insulation board 010 is arranged inside the hollow chamber 006 above the electromagnetic coil 011 for heat-insulating the electromagnetic coil 011; a plurality of electromagnetic heating controllers 015 are arranged on the kiln main body 001, and the electromagnetic heating controllers 015 are respectively connected to the corresponding electromagnetic coils 011 for controlling the electromagnetic coils 011 to generate high-frequency, high-voltage alternating current to heat the sagger 009, and the electromagnetic coils 011 are adapted to the hollow chamber 006.

[0029] It should be noted that the refractory insulation layer 002 in this embodiment is a corundum mullite refractory insulation layer, which plays a role in thermal insulation, maintains the kiln temperature, and reduces heat energy loss.

[0030] In the actual process, an electromagnetic coil 011 is arranged at the bottom of the sagger 009, and an electromagnetic heating controller 015 is used to make the electromagnetic coil 011 generate a high-frequency, high-voltage alternating current, so that the sagger 009 generates a high temperature. At the same time, a heat insulation board 010 insulates the electromagnetic coil 011 to prevent it from being oxidized at high temperature. The foamed ceramic raw material contained in the sagger 009 is heated and calcined by the heat radiation of the sagger 009 itself, and is crystallized, foamed and sintered into shape under the high-temperature radiation. In this way, efficient heat conduction can be achieved, and heat dissipation in the heating process can be reduced, so that the entire firing process has high thermal efficiency, short processing time, low energy consumption, and reduces waste gas generated during the combustion process, making it more environmentally friendly.

[0031] In addition, this method also eliminates the need for a gas combustion system and the required supporting piping system, making the kiln structure compact and greatly saving the construction cost of the kiln. It also reduces the investment in flue gas collection and environmental emission treatment equipment, and reduces the direct production cost of foamed ceramic panels.

[0032] It should be noted that electromagnetic heaters are devices that use the principle of electromagnetic induction to convert electrical energy into heat energy. The electromagnetic controller rectifies 220V, 50 / 60Hz AC into DC, and then modulates the DC into a high-frequency, high-voltage current with a frequency of 20-40KHz. The high-frequency, high-voltage current flowing through the coil will generate a high-speed changing alternating magnetic field. When a magnetic material with magnetic conductivity approaches the electromagnetic coil, a circular current, namely "electromagnetic eddy current", will be induced inside the magnetic material. The high-speed irregular movement of atoms will cause mutual collision and friction to generate heat energy. This is a prior art and will not be elaborated here.

[0033] Specifically, Figure 2 and Figure 3 As shown, the hollow chamber 006 in this embodiment is provided with a preheating section 0061, a high temperature section 0062 and a sintering section 0063 in sequence along the length direction of the kiln body 001; the electromagnetic coil 011 and the heat insulation board 010 are located inside the preheating section 0061 and the high temperature section 0062.

[0034] In actual use, the preheating section 0061, the high temperature section 0062 and the firing section 0063 inside the hollow chamber 006 can respectively perform the preheating, high temperature firing and the final cooling and molding process before exiting the kiln.

[0035] Specifically, when the sagger 009 moves to the inside of the preheating section 0061, the electromagnetic heating controller 015 is turned on, and the electromagnetic heating controller 015 is used to make the electromagnetic coil 011 generate a high-frequency, high-voltage alternating current to make the sagger 009 generate a high temperature, and the foamed ceramic plate material is preheated by the heat radiation of the sagger 009 itself. After entering the inside of the high-temperature section 0062, the same principle is used to make the electromagnetic heating controller 015 to make the electromagnetic coil 011 generate a high-frequency, high-voltage alternating current to heat the sagger 009, so that the foamed ceramic raw materials contained therein are crystallized, foamed and sintered into shape under the high-temperature radiation.

[0036] The sagger 009 in this embodiment is made of high temperature resistant magnetic conductive metal material, and the sagger 009 is 310S stainless steel plate or 904L stainless steel plate.

[0037] Preferably, Figure 1 and Figure 3 In the present embodiment, the high temperature section 0062 is provided with an electromagnetic coil 2 003, a heat insulation plate 2 004 and a heat radiation plate 005 in sequence from top to bottom. The heat insulation plate 2 004 is used for heat insulation of the electromagnetic coil 2 003. The electromagnetic heating controller 015 is connected to the electromagnetic coil 2 003 for heating the heat radiation plate 005. The heat radiation plate 005 is used to generate heat radiation. The electromagnetic coil 2 003 is adapted to the hollow chamber 006.

[0038] When the sagger 009 moves to the inside of the high-temperature section 0062, in order to improve the firing effect of the foamed ceramic material, it is fired at high temperature, and the electromagnetic heating controller 015 is turned on. The electromagnetic heating controller 015 is used to make the electromagnetic coil 2 003 generate a high-frequency, high-voltage alternating current, and the heat radiation plate 005 is heated by the electromagnetic induction of the electromagnetic coil 2 003. The heat radiation generated by the heat radiation plate 005 is used to fire the sagger 009 and the ceramic foam material.

[0039] The heat radiation plate 005 in this embodiment is made of a high temperature resistant magnetic conductive metal material, and the heat radiation plate 005 is a 310S stainless steel plate or a 904L stainless steel plate.

[0040] It should be noted that both the insulation board 1 010 and the insulation board 2 004 are aluminum silicate ceramic fiber boards, which are protected by the electromagnetic coil 1 011 and the electromagnetic coil 2 003 respectively through the insulation board 1 010 and the insulation board 2 004, and at the same time have a heat preservation effect to reduce the heat loss inside the kiln body 001.

[0041] Further, such as Figure 1 and Figure 2 As shown, in this embodiment, grooves 008 are relatively opened at the bottom of the hollow chamber 006, bearings 014 are relatively rotatably arranged inside the grooves 008, a roller 013 is rotatably arranged between two adjacent bearings 014, and the tops of the two rollers 013 are slidably matched with the sagger 009, wherein the sagger 009 is adapted to the hollow chamber 006.

[0042] The rollers 013 can rotate freely through the rotation support of the bearings 014 at both ends, so that a plurality of bearings 014 and a plurality of rollers 013 together form an unpowered sliding platform, which facilitates the sagger 009 to slide forward inside the hollow chamber 006 .

[0043] It should be noted that the bearing 014 is a high temperature resistant ceramic bearing, and the roller 013 is a high temperature resistant ceramic roller.

[0044] As a preferred embodiment, Figure 2 and Figure 4 As shown, in this embodiment, a cushion block 012 is disposed at the bottom of the sagger 009 , and the cushion block 012 abuts against the corresponding roller 013 .

[0045] It can be understood that the pad 012 is a corundum mullite pad. The high temperature resistant mullite pad can have a heat insulation effect on the bearing 014 and the roller 013.

[0046] As a preferred embodiment, Figure 1 and Figure 2As shown, the present embodiment also includes a plurality of thermocouple temperature sensors 016, which are sequentially arranged inside the hollow chamber 006 along the length of the kiln body 001, and one end of the thermocouple temperature sensor 016 extends to the outside of the kiln body 001 and is connected to the electromagnetic heating controller 015, so as to control the internal temperature of the hollow chamber 006.

[0047] During actual use, the thermocouple temperature sensor 016 collects the temperature data inside the hollow chamber 006 and transmits the temperature data to the control circuit of the electromagnetic heating controller 015. The electromagnetic heating controller 015 uses the kiln temperature data to change the heating power of the electromagnetic coil 1 011 and the electromagnetic coil 2 003 according to the requirements of the production process, thereby adjusting the thermal radiation temperature of the sagger 009 and the heat radiation plate 005 to meet the different temperature requirements of each section of the kiln.

[0048] Specifically, the thermocouple temperature sensor 016 is a K-type high temperature resistant thermocouple temperature sensor.

[0049] It should be noted that the electromagnetic coil 1 011 and the electromagnetic coil 2 003 are both made of mica high temperature resistant wire with a temperature resistance of more than 500 degrees, which is wound in a plane into a spiral shape;

[0050] In addition, each electromagnetic coil 1 011 and electromagnetic coil 2 003 is respectively connected to the corresponding electromagnetic heating controller 015, so that the power of each electromagnetic coil 1 011 and electromagnetic coil 2 003 can be adjusted independently, achieving more accurate temperature control and energy saving and high efficiency.

[0051] Further, such as Figure 3 As shown, this embodiment further includes a driving member 007, which is disposed at one end of the hollow chamber 006 close to the preheating section 0061, and is used to push the sagger 009 forward.

[0052] In actual use, the saggers 009 placed on the rollers 013 are pushed in sequence by the driving member 007. Through the transmission between the multiple saggers 009, the saggers 009 pass through the preheating section 0061, the high temperature section 0062 and the firing section 0063 in sequence, so as to preheat the foamed ceramic board material inside, fire it at high temperature, and finally cool it out of the kiln.

[0053] It should be noted that the driving member 007 in this embodiment is a hydraulic push rod or a screw push rod.

[0054] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0055] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0056] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An electromagnetic kiln for firing foamed ceramic plates, characterized in that: include: A kiln main body (001) formed by connecting a plurality of kiln sections in sequence, wherein a refractory heat-insulating layer (002) is arranged inside the kiln main body; A hollow chamber (006) for firing the foamed ceramic plate is provided inside the refractory heat-insulating layer (002), a sagger (009) for accommodating the raw materials of the foamed ceramic plate is slidably provided inside the hollow chamber (006), a plurality of electromagnetic coils (011) are provided at the bottom of the hollow chamber (006) along the length of the kiln body (001), and a heat insulation board (010) is provided inside the hollow chamber (006) and is located above the electromagnetic coil (011) for heat insulation of the electromagnetic coil (011); A plurality of electromagnetic heating controllers (015) are arranged on the kiln body (001), and the electromagnetic heating controllers (015) are respectively connected to the corresponding electromagnetic coils 1 (011) and are used to control the electromagnetic coils 1 (011) to generate high-frequency, high-voltage alternating current to heat the sagger (009).

2. The electromagnetic kiln for firing a foamed ceramic plate according to claim 1, characterized in that: The hollow chamber (006) is provided with a preheating section (0061), a high temperature section (0062) and a sintering section (0063) in sequence along the length of the kiln body (001); The electromagnetic coil one (011) and the heat insulation board one (010) are located inside the preheating section (0061) and the high temperature section (0062).

3. An electromagnetic kiln for firing a foamed ceramic plate as claimed in claim 2, characterized in that: The high temperature section (0062) is provided with electromagnetic coil 2 (003), heat insulation plate 2 (004) and heat radiation plate (005) in sequence from top to bottom. The heat insulation plate 2 (004) is used for heat insulation of the electromagnetic coil 2 (003). The electromagnetic heating controller (015) is connected to the electromagnetic coil 2 (003) and is used for heating the heat radiation plate (005). The heat radiation plate (005) is used for generating heat radiation.

4. The electromagnetic kiln for firing a foamed ceramic plate according to claim 1, characterized in that: Grooves (008) are relatively opened at the bottom of the hollow chamber (006), bearings (014) are relatively rotatably arranged inside the grooves (008), rollers (013) are rotatably arranged between two adjacent bearings (014), and the tops of the two rollers (013) are slidably matched with the sagger (009).

5. The electromagnetic kiln for firing a foamed ceramic plate as claimed in claim 4, characterized in that: A cushion block (012) is arranged opposite to the bottom of the sagger (009), and the cushion block (012) abuts against a corresponding roller rod (013).

6. The electromagnetic kiln for firing a foamed ceramic plate according to claim 1, characterized in that: It also includes a plurality of thermocouple temperature sensors (016), which are sequentially arranged inside the hollow chamber (006) along the length of the kiln body (001), and one end of the thermocouple temperature sensor (016) extends to the outside of the kiln body (001) and is connected to the electromagnetic heating controller (015) for controlling the internal temperature of the hollow chamber (006).

7. The electromagnetic kiln for firing a foamed ceramic plate according to claim 2, characterized in that: It also includes a driving member (007), which is arranged at one end of the hollow chamber (006) close to the preheating section (0061), and is used to push the sagger (009) forward.

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