Electric boosting kiln

Abstract

The utility model provides an electric boosting kiln, and relates to the technical field of electric boosting kilns. An electric boosting kiln comprises a kiln body, and a plurality of temperature areas are arranged in the kiln body in the vertical direction. A plurality of pairs of branch electrodes are arranged on the side wall of the kiln body, and at least one pair of branch electrodes is arranged in each temperature area. The at least one pair of branch electrodes of each temperature area is connected with the controller, and the controller can independently control the at least one pair of branch electrodes of each temperature area. The electric boosting kiln can independently control the current of the sub-electrode of each temperature area, so that the problem of non-uniform heating of the electrode in the kiln due to the temperature difference between the upper glass liquid and the lower glass liquid of the kiln is avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electric melting furnaces, and in particular to an electric melting furnace. Background Art

[0002] At present, due to the restrictions of environmental protection requirements on flame furnaces, the use of all-electric furnaces is in a rapid development stage.

[0003] like Figure 1 As shown, the arrangement of the electric boosting electrodes is symmetrically distributed in pairs on both sides of the furnace. When current passes between each pair of electrodes, the glass liquid is heated. The temperature of the glass liquid in the furnace can be adjusted by adjusting the current. Figure 2 and Figure 3 As shown, each electrode is composed of a plurality of small electrode bricks, and the small electrode bricks are connected as a whole to form a whole.

[0004] Due to the poor fluidity and thermal conductivity of the glass liquid in the furnace, the temperature distribution of the glass liquid is uneven. There is a temperature difference between the glass liquid above and below the furnace, so the resistance of the glass liquid in different places is different. The glass liquid with high temperature has low resistance, and the glass liquid with low temperature has high resistance. When the electrode current flows through, the current will flow through the glass liquid with low resistance, which will cause the electrode to be heated unevenly inside the furnace, resulting in more heating of the glass liquid with higher temperature and less heating of the glass liquid with lower temperature, making the glass liquid in the furnace more uneven. When adjusting the current, the glass liquid with high temperature distributes a high current, which also fails to achieve the purpose of accurately controlling the temperature of the furnace. Utility Model Content

[0005] A technical problem to be solved by the present disclosure is: how to avoid the problem of uneven heating of electrodes inside the kiln caused by temperature differences in the glass liquid in the kiln.

[0006] In order to solve the above technical problems, the embodiment of the present disclosure provides an electric melting furnace, comprising:

[0007] A kiln body, wherein a plurality of temperature zones are arranged in a vertical direction in the kiln body;

[0008] A plurality of pairs of sub-electrodes are arranged on the side wall of the kiln body, and at least one pair of sub-electrodes is arranged in each temperature zone;

[0009] At least one pair of sub-electrodes in each temperature zone is respectively connected to a controller, and the controller can independently control at least one pair of sub-electrodes in each temperature zone.

[0010] In some embodiments, the area within the kiln body consists of a first temperature area and a second temperature area, the first temperature area and the second temperature area have the same volume, the first temperature area is set on a side close to the top of the kiln body, and the second temperature area is set on a side close to the bottom of the kiln body.

[0011] In some embodiments, a temperature sensor is provided in each temperature zone, and the temperature sensor is connected to the controller.

[0012] In some embodiments, the plurality of temperature zones are evenly distributed along the vertical direction.

[0013] In some embodiments, a plurality of temperature sensors are provided, each temperature sensor corresponds to a position of each sub-electrode provided in the temperature region; each temperature sensor is connected to the controller;

[0014] In some embodiments, a plurality of sub-electrodes are disposed in each temperature zone, and the plurality of sub-electrodes are evenly distributed in the temperature zone along the vertical direction.

[0015] In some embodiments, the sub-electrodes are composed of a plurality of electrode bricks arranged in sequence, and a plurality of pairs of sub-electrodes are arranged in sequence to form a total electrode.

[0016] In some embodiments, a fire-resistant insulating layer is disposed between adjacent sub-electrodes.

[0017] In some embodiments, the refractory insulation layer is made of the same material as the sidewalls of the furnace body.

[0018] In some embodiments, the two poles of the sub-electrodes are symmetrically distributed on both sides of the kiln body, the positive pole of each sub-electrode is arranged on the first side of the kiln body, and the negative pole of each sub-electrode is arranged on the second side of the kiln body.

[0019] Through the above technical scheme, the electric melting furnace provided by the present invention is provided with multiple temperature zones in the vertical direction inside the furnace body; and multiple pairs of sub-electrodes are provided on the side walls of the furnace body, and at least one pair of sub-electrodes are provided in each temperature zone, so that the current in different temperature zones can be adjusted respectively by different sub-electrodes; and at least one pair of sub-electrodes in each temperature zone is connected to the controller respectively, so as to control the current of the sub-electrode in each temperature zone separately, thereby avoiding the problem of uneven heating of the electrodes inside the furnace due to the temperature difference between the glass liquid in the upper and lower parts of the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 1 It is a structural schematic diagram of an electric-assisted melting furnace in the prior art;

[0022] Figure 2 It is a front view of an electrode in the prior art;

[0023] Figure 3 is a side view of an electrode in the prior art;

[0024] Figure 4 It is a schematic diagram of the structure of the electric melting furnace disclosed in the embodiment of the present disclosure;

[0025] Figure 5 is a front view of the electric booster furnace disclosed in the embodiment of the present disclosure;

[0026] Figure 6 It is a top view of the electric melting furnace disclosed in the embodiment of the present disclosure.

[0027] Figure 7 It is a front view of the total electrode disclosed in the embodiment of the present disclosure.

[0028] Figure 8 is a side view of the total electrode disclosed in the embodiment of the present disclosure

[0029] Description of reference numerals:

[0030] 1. Kiln body; 2. Main electrode; 21. Sub-electrode; 211. Electrode brick; 212. Connecting device; 22. Refractory insulation layer; 3. Glass liquid; 4. Feeding port; 5. First temperature zone; 6. Second temperature zone; 7. Temperature sensor. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0032] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0033] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply 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 disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0035] It should also be noted that in the description of the present disclosure, 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0036] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0038] The arrangement of the electric boosting electrodes is symmetrically distributed in pairs on both sides of the furnace. When current passes between each pair of electrodes, the glass liquid is heated. The temperature of the glass liquid in the furnace can be adjusted by adjusting the current. Each electrode is composed of multiple small electrode bricks, which are connected as a whole.

[0039] Due to the poor fluidity and thermal conductivity of the glass liquid in the furnace, the temperature distribution of the glass liquid is uneven. There is a temperature difference between the glass liquid above and below the furnace, so the resistance of the glass liquid in different places is different. The glass liquid with high temperature has low resistance, and the glass liquid with low temperature has high resistance. When the electrode current flows through, the current will flow through the glass liquid with low resistance, which will cause the electrode to be heated unevenly inside the furnace, resulting in more heating of the glass liquid with higher temperature and less heating of the glass liquid with lower temperature, making the glass liquid in the furnace more uneven. When adjusting the current, the glass liquid with high temperature distributes a high current, which also fails to achieve the purpose of accurately controlling the temperature of the furnace.

[0040] In order to solve the above technical problems, the embodiments of the present disclosure provide an electric melting furnace, which can avoid the problem of uneven heating of electrodes inside the furnace caused by temperature differences in the glass liquid in the furnace.

[0041] Example 1

[0042] like Figure 4 , Figure 5 and Figure 6 As shown, an embodiment of the present disclosure provides an electric melting furnace, including a furnace body 1, in which a plurality of temperature zones are arranged along the vertical direction; a plurality of pairs of sub-electrodes 21 are arranged on the side wall of the furnace body 1, and at least one pair of sub-electrodes 21 is arranged in each temperature zone; at least one pair of sub-electrodes 21 in each temperature zone is respectively connected to a controller, and the controller can individually control at least one pair of sub-electrodes 21 in each temperature zone.

[0043] The furnace body 1 is the main part of the electric melting furnace. Glass liquid 3 can be loaded inside the furnace body 1, and electrodes are arranged on the side walls of the furnace body 1, and the molten glass liquid 3 is heated by the electrodes. Specifically, a feeding port 4 can be arranged on the side wall of the furnace body 1 near the top of the furnace body 1, and materials are fed into the furnace body 1 through the feeding port 4; the furnace body 1 can be a hollow cylinder or a hollow square, and the specific shape and structure of the furnace body 1 are not limited.

[0044] The temperature zone is set to be distributed in multiple areas along the vertical direction. Due to the poor thermal conductivity of the glass liquid 3, the temperature distribution of the glass liquid 3 in the kiln body 1 is uneven. The temperature may be high near the top of the kiln body 1, or near the bottom of the kiln body 1, or in the middle of the kiln body 1. The division of the temperature zone can be adjusted according to actual conditions and experience, or it can be divided into several temperature zones evenly along the vertical direction. There is no specific limitation on the specific division of the temperature zone, as long as these temperature zones can fully cover the area inside the kiln body 1.

[0045] The sub-electrode 21 is an electrode used to heat the inside of the kiln body 1. Specifically, the two poles of the sub-electrode 21 can be symmetrically distributed on the side walls of the kiln body 1, so as to heat the glass liquid 3 inside the kiln body 1; the sub-electrode 21 can be an electrode rod, such as Figure 7 and Figure 8 As shown, it can also be composed of multiple electrode bricks 211, and the specific structure and type of the sub-electrode 21 are not limited, as long as the sub-electrode 21 can electrically heat the glass liquid 3 inside the kiln body 1.

[0046] The controller is a control system for controlling the amount of electricity in the electrode. Specifically, the controller can be a PLC (programmable logic controller), a computer operating system, etc., or other types of controllers, and there is no specific limitation on the type of controller; the controller can be one, and multiple sub-electrodes 21 can be controlled individually by a master controller; multiple controllers can also be set, and multiple controllers are respectively connected to the sub-electrodes 21 in each temperature zone.

[0047] Through the above technical scheme, the electric melting furnace provided by the present invention is provided with a plurality of temperature zones in the vertical direction in the furnace body 1; and a plurality of pairs of sub-electrodes 21 are provided on the side wall of the furnace body 1, and at least one pair of sub-electrodes 21 is provided in each temperature zone, so that the current in different temperature zones can be adjusted respectively by different sub-electrodes 21; and at least one pair of sub-electrodes 21 in each temperature zone is connected to the controller respectively, so as to control the current of the sub-electrode 21 in each temperature zone separately, thereby avoiding the problem of uneven heating of the electrodes inside the furnace due to the temperature difference between the glass liquid 3 in the upper and lower parts of the furnace.

[0048] In some embodiments, the area in the kiln body 1 is composed of a first temperature area 5 and a second temperature area 6. The first temperature area 5 and the second temperature area 6 have the same volume. The first temperature area 5 is arranged on a side close to the top of the kiln body 1, and the second temperature area 6 is arranged on a side close to the bottom of the kiln body 1. The top and bottom of the existing kiln body 1 are respectively provided with temperature sensors 7, which divide the area in the kiln body 1 into the first temperature area 5 and the second temperature area 6, and the two temperature areas are controlled separately. There is no need to install a new temperature sensor 7, and a new electrode can be directly installed on the existing kiln body 1, which is convenient for directly improving the existing kiln.

[0049] In some embodiments, a temperature sensor 7 is provided in each temperature zone, and the temperature sensor 7 is connected to the controller. The temperature sensor 7 is a sensor that can sense temperature and convert it into a usable output signal. Specifically, the temperature sensor 7 can be selected from a thermal resistor temperature sensor and a thermocouple temperature sensor. If the temperature in the kiln is too high, a non-contact temperature sensor 7, such as an infrared temperature sensor, can also be selected. As long as the temperature sensor 7 can measure the temperature of the corresponding temperature zone in the kiln body 1, there is no specific limitation on the temperature sensor 7 and the structure and type in the kiln body 1. By providing a temperature sensor 7 in each temperature zone and transmitting the temperature signal of the temperature sensor 7 to the controller, the temperature in each temperature zone can be known, and the current of each temperature zone can be adjusted according to the temperature in each temperature zone, the current of the high temperature zone can be lowered, and the current of the low temperature zone can be increased, so as to ensure the uniform temperature of the glass liquid 3 in the kiln body 1 as much as possible. More specifically, when adjusting the electric melting current during the heating period, the upper and lower electrode currents can be set to the same; when adjusting the electric melting current during the process countermeasure, it can be adjusted at the same time or separately according to the actual situation.

[0050] In some embodiments, multiple temperature zones are evenly distributed in the vertical direction. That is, the furnace body 1 is evenly divided into multiple zones in the vertical direction, and each zone has the same height in the vertical direction. Due to the poor thermal conductivity of the glass liquid 3, the temperature distribution of the glass liquid 3 in the furnace body 1 is uneven and uncertain. The temperature may be high near the top of the furnace body 1, or near the bottom of the furnace body 1, or in the middle of the furnace body 1. Due to the uncertainty of the temperature distribution of the glass liquid 3, judging the temperature distribution of the glass liquid based on experience alone may not be accurate. Therefore, the present application divides the space inside the furnace body 1 into multiple zones in the vertical direction, and each zone has the same height in the vertical direction. The amount of current can be controlled separately in multiple subdivided evenly distributed temperature zones, further improving the uniformity of the temperature distribution of the glass liquid 3 during heating.

[0051] Specifically, during use, only the temperature region where the liquid level of the glass liquid 3 is located and the temperature region below the temperature region are used. For example, the liquid level of the glass liquid 3 is low, and the liquid level of the glass liquid 3 does not reach the temperature region near the top of the kiln body 1. The scoring electrode 21 in the temperature region near the top of the kiln body 1 is not used, thereby saving energy.

[0052] In some embodiments, a plurality of temperature sensors 7 are provided, and each temperature sensor 7 corresponds to the position of each sub-electrode 21 provided in the temperature zone; each temperature sensor 7 is connected to a controller. The controller in each zone can adjust the current of the sub-electrode 21 in the zone according to the temperature of the zone, thereby adjusting the temperature of the zone more accurately, further improving the uniformity of the temperature of the glass liquid 3 in the furnace.

[0053] In some embodiments, a plurality of sub-electrodes 21 are provided in each temperature zone, and the plurality of sub-electrodes 21 are evenly distributed in the vertical direction in the temperature zone. By providing a plurality of sub-electrodes 21 evenly distributed in the vertical direction in each temperature zone, the uniformity of heating in the temperature zone can be ensured, and uneven heating in the temperature zone can be avoided. Specifically, a whole block of sub-electrodes 21 composed of a plurality of electrode bricks 211 can also be provided in the temperature zone, and the sub-electrodes 21 are provided on the side wall of the temperature zone and cover the entire vertical direction of the zone, thereby ensuring the uniformity of the current in the zone, and then ensuring the uniformity of heating of the glass liquid 3 in the kiln, thereby improving the uniformity of the temperature of the glass liquid 3 in the kiln.

[0054] In some embodiments, the sub-electrode 21 is composed of a plurality of electrode bricks 211 arranged in sequence, and a plurality of pairs of sub-electrodes 21 are arranged in sequence to form a total electrode 2. On the one hand, the sub-electrode 21 composed of a plurality of electrode bricks 211 can cover a larger temperature range and ensure the uniformity of heating in the temperature region. On the other hand, the original electrode is composed of a plurality of small electrode bricks 211, which are connected as a whole into a whole, and the original electrode is plugged into the mounting hole of the side wall of the kiln. In this embodiment, the sub-electrode 21 is composed of a plurality of electrode bricks 211 arranged in sequence, and a connecting device 212 can be provided on one side of the sub-electrode 21, and a plurality of electrode bricks can be connected together through the connecting device 212. The total electrode 2 is composed of a plurality of pairs of sub-electrodes 21 arranged in sequence. In this embodiment, the height of the total electrode 2 can be the same as the height of the original whole electrode, and there is no need to improve the original mounting hole. The improved electrode can be directly installed on the existing kiln body 1. For example, the upper part of the original electrode is about 100 mm away from the glass liquid surface, the lower part is about 100 mm away from the pool bottom, and the width is about 500 mm. The original total electrode 2 can be divided into two sub-electrodes 21 with a width of 230 mm, and an insulating material with a thickness of 40 mm is set between the two sub-electrodes 21, so that the improved new electrode with a width of still 500 mm can be installed in the original installation hole.

[0055] In some embodiments, a refractory insulating layer 22 is provided between adjacent sub-electrodes 21. The refractory insulating layer 22 may be made of pool wall bricks or other types of materials, as long as they are refractory and insulating, and the specific type of the refractory insulating layer 22 is not limited. Specifically, the thickness of the refractory insulating layer 22 may be between 30 mm and 80 mm, and the sub-electrodes 21 are separated by the refractory insulating layer 22 to prevent mutual conduction between the sub-electrodes 21 and to prevent the high temperature in the kiln body 1 from melting the separation material between adjacent sub-electrodes 21, so that the sub-electrodes 21 are in contact with each other.

[0056] In some embodiments, the refractory insulating layer 22 is made of the same material as the side wall of the kiln body 1. For example, the side wall of the kiln body 1 is made of pool wall bricks, and the refractory insulating layer 22 between adjacent sub-electrodes 21 is also made of pool wall bricks. The refractory insulating layer 22 between adjacent sub-electrodes 21 is set to be made of the same material as the side wall of the kiln body 1, so that the erosion degree of the refractory insulating layer 22 between adjacent sub-electrodes 21 and the side wall of the kiln body 1 by the glass liquid 3 can be the same, avoiding the unevenness inside the kiln body 1, thereby affecting the fluidity of the glass liquid 3 and affecting the uniformity of heating in each temperature zone.

[0057] In some embodiments, the two poles of the sub-electrode 21 are symmetrically distributed on both sides of the kiln body 1, the positive pole of each sub-electrode 21 is set on the first side of the kiln body 1, and the negative pole of each sub-electrode 21 is set on the second side of the kiln body 1, that is, the upper and lower electrodes have the same polarity to avoid current conduction between the upper and lower sub-electrodes 21.

[0058] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0059] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. An electric melting furnace, characterized in that: include: A kiln main body (1), wherein a plurality of temperature zones are arranged in a vertical direction in the kiln main body (1); A plurality of pairs of sub-electrodes (21) are arranged on the side wall of the kiln body (1), and at least one pair of sub-electrodes (21) is arranged in each temperature zone; The at least one pair of sub-electrodes (21) in each temperature zone is respectively connected to a controller, and the controller is capable of individually controlling the at least one pair of sub-electrodes (21) in each temperature zone.

2. The electric boosting furnace according to claim 1, characterized in that: The area within the kiln body (1) consists of a first temperature area (5) and a second temperature area (6), the first temperature area (5) and the second temperature area (6) have the same volume, the first temperature area (5) is arranged on a side close to the top of the kiln body (1), and the second temperature area (6) is arranged on a side close to the bottom of the kiln body (1).

3. The electric boost melting furnace according to claim 1 or 2, characterized in that: A temperature sensor (7) is provided in each temperature zone, and the temperature sensor (7) is connected to the controller.

4. The electric boost melting furnace according to claim 3, characterized in that: The multiple temperature regions are evenly distributed along the vertical direction.

5. The electric boost melting furnace according to claim 4, characterized in that: A plurality of the temperature sensors (7) are provided, and each of the temperature sensors (7) corresponds one-to-one to the position of each of the sub-electrodes (21) provided in the temperature area; each of the temperature sensors (7) is connected to the controller.

6. The electric boost melting furnace according to claim 5, characterized in that: A plurality of sub-electrodes (21) are arranged in each temperature zone, and the plurality of sub-electrodes (21) are evenly distributed in the temperature zone along the vertical direction.

7. The electric boosting furnace according to claim 1, characterized in that: The sub-electrodes (21) are composed of a plurality of electrode bricks (211) arranged in sequence, and the plurality of pairs of sub-electrodes (21) are arranged in sequence to form a total electrode (2).

8. The electric boost melting furnace according to claim 7, characterized in that: A fire-resistant insulating layer (22) is provided between adjacent sub-electrodes (21).

9. The electric boosting furnace according to claim 8, characterized in that: The refractory insulation layer (22) is made of the same material as the side wall of the kiln body (1).

10. The electric boosting furnace according to claim 1, characterized in that: The two poles of the sub-electrodes (21) are symmetrically distributed on both sides of the kiln body (1), the positive pole of each sub-electrode (21) is arranged on the first side of the kiln body (1), and the negative pole of each sub-electrode (21) is arranged on the second side of the kiln body (1).

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