Ceramic firing equipment

Abstract

The utility model provides ceramic firing equipment which comprises a firing chamber and a plurality of groups of heating elements, and the firing chamber is provided with a space for placing a ceramic body; a plurality of groups of heating elements are uniformly distributed at the periphery and the bottom of the firing chamber, each group of heating elements is electrically connected with an independent temperature control module through a wire, and the temperature control module is arranged in a control box outside the firing chamber so as to realize independent control on the output power of each group of heating elements; the heating elements are arranged in the firing chamber, the heating elements are arranged in the firing chamber, the ventilation structure comprises an adjustable ventilation opening formed in the top of the firing chamber and an air inlet formed in the bottom of the firing chamber, the structural design is novel, and through the multiple sets of independent temperature control heating elements and the ventilation structure, temperature field distribution in the firing chamber is effectively improved; and the ceramic body can be uniformly heated in the firing process, so that the over-firing or under-firing phenomenon of the product caused by non-uniform temperature is greatly reduced, and the yield and the quality stability of the product are improved.

Description

Technical Field

[0001] This utility model relates to the field of ceramic production equipment technology, and in particular to a ceramic firing device. Background Technology

[0002] Firing is a crucial step in ceramic production, directly impacting the quality, performance, and appearance of ceramic products. Traditional ceramic firing equipment suffers from several problems. For example, poor temperature uniformity leads to uneven heating during firing, resulting in over-firing or under-firing of some products, significantly affecting yield and quality stability. Furthermore, traditional firing equipment offers limited monitoring and adjustment capabilities, making it difficult to precisely control the firing process based on the characteristics of different ceramic blanks and real-time changes, further hindering product quality improvement. With the continuous development of the ceramic industry, the performance requirements for ceramic firing equipment are increasing. Therefore, developing a new type of ceramic firing equipment that effectively solves the above problems is of significant practical importance. Summary of the Invention

[0003] This invention provides a ceramic firing device to solve the problems of poor temperature uniformity and difficulty in precise monitoring in existing ceramic firing devices, thereby improving the quality and production efficiency of ceramic products and reducing production costs.

[0004] This utility model provides a ceramic firing device, including a firing chamber and multiple sets of heating elements;

[0005] The firing chamber has space for placing ceramic blanks;

[0006] The multiple sets of heating elements are evenly distributed around and at the bottom of the firing chamber, and each set of heating elements is electrically connected to an independent temperature control module via wires. The temperature control module is installed in a control box outside the firing chamber.

[0007] Preferably, it also includes a ventilation structure, which includes an adjustable vent, an air inlet, a circulating fan, and a waste heat recovery component. The adjustable vent is located at the top of the firing chamber, the air inlet is located at the bottom of the firing chamber, one end of the adjustable vent is connected to the waste heat recovery component, the other end of the waste heat recovery component is connected to the air inlet of the circulating fan, and the air outlet of the circulating fan is connected to the air inlet.

[0008] Preferably, the heating element in each group is any one of nickel-chromium alloy resistance wire, silicon carbide rod, or molybdenum wire heating element.

[0009] Preferably, the waste heat recovery component adopts a tubular heat exchanger, which includes an outer shell and multiple heat exchange tubes. The multiple heat exchange tubes are arranged in parallel within the inner cavity of the outer shell. One end of the outer shell is provided with an air inlet, and the other end is provided with an air outlet. The heat exchange tubes are made of 310S stainless steel.

[0010] Preferably, the device also includes multiple temperature sensors, which are embedded in different positions on the inner wall of the firing chamber. Each temperature sensor is electrically connected to a controller located in the control box via a signal line, for transmitting the collected temperature data to the controller in real time.

[0011] Preferably, the temperature sensor is an armored thermocouple temperature sensor, the sensing end of which passes through the inner wall of the firing chamber and extends into the firing chamber, while its wiring terminal is located outside the firing chamber and connected to the signal line.

[0012] Beneficial effects:

[0013] (1) The present invention has a novel structural design. Through multiple sets of independently temperature-controlled heating elements and ventilation structure, it effectively improves the temperature field distribution in the firing chamber, so that the ceramic blank can be heated evenly during the firing process, greatly reducing the over-firing or under-firing phenomenon caused by uneven temperature, and improving the product yield and quality stability.

[0014] (2) The heat exchanger in the waste heat recovery structure of this utility model can effectively capture the heat in the exhaust gas discharged from the vent. When the exhaust gas leaves the firing chamber, it usually carries a large amount of waste heat. The heat exchanger allows the exhaust gas to circulate through one side channel and the other side channel is used to transport combustion air or preheating air for the billet, so that heat is transferred from the exhaust gas to these air flows. The combustion air, which has been preheated by the heat exchanger, enters the firing chamber to participate in the combustion process. Due to its initial temperature increase, the combustion is more complete, which can reduce fuel consumption. For the preheating air for the billet, the preheated air can preheat the billet in advance, reducing the workload of the heating element during the heating stage and reducing the overall energy consumption.

[0015] The above description is merely an overview of the technical solutions of the present utility model embodiments. In order to better understand the technical means of the present utility model embodiments and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present utility model embodiments more obvious and understandable, specific embodiments of the present utility model are described below. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the ventilation structure installation of this utility model;

[0019] Figure 3 This is a schematic diagram of the waste heat recovery component of this utility model;

[0020] Explanation of reference numerals in the attached drawings: 1. Firing chamber; 2. Heating element; 3. Temperature control module; 4. Control box; 5. Adjustable vent; 6. Air inlet; 7. Circulating fan; 8. Waste heat recovery assembly; 9. Outer shell; 10. Heat exchange tube; 11. Air inlet; 12. Air outlet; 13. Temperature sensor; 14. Controller. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this invention are intended to cover non-exclusive inclusion.

[0023] Furthermore, the terms "first," "second," etc., in the specification, claims, or drawings of this utility model are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0026] Please see Figures 1-3 This utility model discloses a ceramic firing device, including a firing chamber 1 and multiple sets of heating elements 2;

[0027] The firing chamber 1 has a space for placing ceramic blanks;

[0028] The multiple sets of heating elements 2 are evenly distributed around and at the bottom of the firing chamber 1, and each set of heating elements 2 is electrically connected to an independent temperature control module 3 via wires. The temperature control module 3 is installed in a control box 4 outside the firing chamber 1 to realize individual control of the output power of each set of heating elements.

[0029] This utility model also includes a ventilation structure, which comprises an adjustable vent 5, an air inlet 6, a circulating fan 7, and a waste heat recovery component 8. The adjustable vent 5 is located at the top of the firing chamber 1, and the air inlet 6 is located at the bottom of the firing chamber 1. One end of the adjustable vent 5 is connected to the waste heat recovery component 8, and the other end of the waste heat recovery component 8 is connected to the air inlet of the circulating fan 7. The air outlet of the circulating fan 7 is connected to the air inlet 6. The circulating fan promotes gas circulation, improves heat exchange efficiency, and achieves efficient recovery and utilization of waste heat from the exhaust gas to preheat the relevant gases or blanks entering the firing chamber.

[0030] In this invention, each heating element 2 is any one of nickel-chromium alloy resistance wire, silicon carbide rod, or molybdenum wire heating element.

[0031] In this invention, the waste heat recovery component 8 employs a tubular heat exchanger, which includes an outer shell 9 and multiple heat exchange tubes 10. The heat exchange tubes 10 are arranged parallel to each other within the inner cavity of the outer shell 9. One end of the outer shell 9 has an air inlet 11, and the other end has an air outlet 12. The heat exchange tubes 10 are made of 310S stainless steel. The heat exchanger in this waste heat recovery structure effectively captures heat from the exhaust gas discharged through the vents. Exhaust gas typically carries a large amount of waste heat when leaving the firing chamber. The heat exchanger allows the exhaust gas to circulate through one channel, while the other channel is used to transport combustion air or preheating air for the billet, thus transferring heat from the exhaust gas to these airflows. The preheated combustion air enters the firing chamber to participate in the combustion process. Due to its increased initial temperature, combustion is more complete, reducing fuel consumption. For preheating air for the billet, the preheated air can preheat the billet in advance, reducing the workload of the heating elements during the heating phase and lowering overall energy consumption.

[0032] Furthermore, this invention also includes multiple temperature sensors 13, which are embedded in different positions on the inner wall of the firing chamber 1. Each temperature sensor 13 is electrically connected to a controller 14 located in the control box 4 via a signal line, for transmitting the collected temperature data to the controller 14 in real time. The temperature sensors 13 are armored thermocouple temperature sensors, with their sensing ends passing through the inner wall of the firing chamber and extending into the chamber, while their terminals are located outside the firing chamber and connected to the signal line. The temperature sensors collect temperature data from various points within the firing chamber in real time and transmit the data to the controller. The controller analyzes and processes the collected temperature data. Once it detects that the temperature in a certain area deviates from the set value, it immediately sends a command to the corresponding temperature control module to adjust the power of the heating element, achieving real-time feedback regulation of the temperature. For example, when a temperature sensor detects that the temperature in a certain area is lower than the set value, the controller will control the corresponding temperature control module to increase the power of the heating element in that area, causing the temperature to quickly rise back to the set value.

[0033] Working Principle: The ceramic green body is placed in a suitable position within the firing chamber, and the chamber door is closed. The device is started, and the heating system begins operation, heating the firing chamber according to the set heating rate. During the heating process, temperature sensors collect temperature data at various points within the firing chamber in real time and transmit it to the controller. The controller compares and analyzes the temperature data with the set firing curve. If a temperature deviation from the set value is detected in a certain area, it immediately sends a command to the corresponding temperature control module to adjust the power of the heating element, ensuring the stability and temperature uniformity of the heating process. Simultaneously, the ventilation system controls the airflow by adjusting the opening of the vents according to different firing stages, expelling moisture and volatile substances from the green body. The exhaust gas typically carries a large amount of residual heat as it leaves the firing chamber. The heat exchanger allows the exhaust gas to circulate through one channel, while the other channel is used to transport combustion air or preheating air for the green body, thus transferring heat from the exhaust gas to these airflows. The combustion air, preheated by heat exchange, enters the firing chamber to participate in the combustion process. When the temperature reaches the holding temperature, the heating system maintains a constant power to stabilize the temperature of the firing chamber within the holding temperature range for a set time. After the holding period ends, the heating system gradually reduces its power according to the set cooling rate to achieve slow cooling.

[0034] In summary, this utility model features a novel structural design. Through multiple sets of independently temperature-controlled heating elements and a ventilation structure, it effectively improves the temperature field distribution within the firing chamber, enabling the ceramic blank to be heated evenly during the firing process. This significantly reduces the over-firing or under-firing phenomenon caused by uneven temperature, thereby improving the product yield and quality stability.

[0035] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A ceramic firing device, characterized in that, It includes a firing chamber (1) and multiple sets of heating elements (2); The firing chamber (1) has a space for placing ceramic blanks; The multiple sets of heating elements (2) are evenly distributed around and at the bottom of the firing chamber (1), and each set of heating elements (2) is electrically connected to an independent temperature control module (3) through wires. The temperature control module (3) is installed in a control box (4) outside the firing chamber (1).

2. The ceramic firing equipment according to claim 1, characterized in that, It also includes a ventilation structure, which includes an adjustable vent (5), an air inlet (6), a circulating fan (7) and a waste heat recovery component (8). The adjustable vent (5) is located at the top of the firing chamber (1), the air inlet (6) is located at the bottom of the firing chamber (1), one end of the adjustable vent (5) is connected to the waste heat recovery component (8), the other end of the waste heat recovery component (8) is connected to the air inlet of the circulating fan (7), and the air outlet of the circulating fan (7) is connected to the air inlet (6).

3. The ceramic firing equipment according to claim 1, characterized in that, The heating element (2) of each group is any one of the following heating elements: nickel-chromium alloy resistance wire, silicon carbide rod or molybdenum wire heating rod.

4. The ceramic firing equipment according to claim 2, characterized in that, The waste heat recovery component (8) adopts a tubular heat exchanger, which includes an outer shell (9) and multiple heat exchange tubes (10). The multiple heat exchange tubes (10) are arranged in parallel inside the outer shell (9). One end of the outer shell (9) is provided with an air inlet (11) and the other end is provided with an air outlet (12). The heat exchange tubes (10) are made of 310S stainless steel.

5. The ceramic firing equipment according to claim 1, characterized in that, It also includes multiple temperature sensors (13), which are embedded in different positions on the inner wall of the firing chamber (1). Each temperature sensor (13) is electrically connected to the controller (14) located in the control box (4) via a signal line, and is used to transmit the collected temperature data to the controller (14) in real time.

6. The ceramic firing equipment according to claim 5, characterized in that, The temperature sensor (13) is an armored thermocouple temperature sensor. The sensing end of the armored thermocouple temperature sensor passes through the inner wall of the firing chamber and extends into the firing chamber. Its wiring terminal is located outside the firing chamber and is connected to the signal line.

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