Glass melting furnace bottom discharge method and device

Abstract

A method and device for discharging materials from the bottom of a glass melting furnace are disclosed. In the method, a glass melting pool contains molten glass liquid, and a first channel for discharging the glass liquid is provided at the bottom. The first channel and a tubular structure form a discharging channel for the glass liquid. A first power supply powers on a first induction coil to heat the discharging pipe, and the power of the first power supply is adjusted so that the surface temperature T1 of the discharging pipe minus the liquidus temperature T of the glass liquid L is between 50 and 260 °C. A second temperature sensor measures the temperature T5 of the auxiliary electrode, and the temperature T5 is less than the liquidus temperature T L When this is the case, a third power supply supplies power to the auxiliary electrode and the discharging pipe. The auxiliary electrode and the discharging pipe serve as two electrodes, so that the glass liquid in the discharging channel between the two generates joule heat under the action of an electric current, and the glass in the discharging pipe melts and flows out, and the furnace discharges materials. The method for discharging materials from the bottom of this glass melting furnace significantly improves the passing property of discharging materials and avoids blockages caused by noble metal deposition and glass crystallization.

Description

Technical Field

[0001] The invention relates to the technical field of glass melting, and in particular to a method and device for discharging materials from the bottom of a glass melting furnace. Background Art

[0002] The molten glass obtained by melting in a glass melting furnace needs to be discharged from the furnace in some way. One of the ways is the freeze-thaw bottom discharging, that is, installing a discharging device at the bottom of the furnace. When discharging is not needed, the discharging port is set to a lower temperature, and the internal molten glass is "frozen"; when discharging is needed, the discharging port is heated to melt the internal glass, and the molten glass in the furnace can be discharged. This method has the function of a discharging valve, so it is also called freeze-thaw valve discharging. The freeze-thaw valve has the advantages of simple operation and the molten glass is not easy to overflow. Especially in the process of radioactive waste liquid glass solidification, it has high safety. Therefore, it is widely used in technical fields such as Joule heating furnace glass solidification and cold crucible glass solidification.

[0003] The German VEK glass solidification furnace uses a freeze-thaw valve-type bottom discharge device. The discharge pipe is installed at the bottom of the furnace, and its upper part is pre-buried inside the furnace refractory material. The lower tubular structure is exposed outside the furnace. The discharge pipe is heated by a medium-frequency induction coil, but the discharge pipe is prone to blockage in the bottom discharge system of the furnace in the prior art. If the glass in the bottom discharge channel crystallizes, the solid-liquid transition temperature is higher, which may result in failure to discharge. In addition, if the glass liquid contains precious metals, which exist as a single substance or oxide droplets at high temperatures, precious metal deposition is prone to occur after the furnace has been working for a long time. Under certain conditions, precious metal deposition and aggregation may occur at the outlet or inside the discharge pipe. Since precious metals have higher melting points, once a large amount of precious metals accumulate, the discharge pipe may be blocked and discharge may be impossible.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0005] The object of the present invention is to provide a method and device for discharging material from the bottom of a glass melting furnace, so as to solve the problem of clogging of the bottom discharging pipe of an existing glass melting furnace, especially a glass solidification melting furnace.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A method for discharging materials from the bottom of a glass melting furnace of the present invention comprises:

[0008] A glass melting pool is installed on a furnace bottom support, the glass melting pool contains molten glass liquid and has a first channel for leading out the glass liquid at the bottom, the furnace bottom support is provided with a first through hole aligned with the first channel, an auxiliary electrode is arranged in the glass melting pool around the first channel, the auxiliary electrode includes a hole-shaped structure aligned with the first channel and a first lead-out wire arranged at the center thereof, a discharge pipe is sealed and connected to the furnace bottom support, the discharge pipe includes a disc-shaped structure with a sealing cover arranged on the upper surface of the furnace bottom support, a tubular structure extending downward from the disc-shaped structure and a second lead-out wire, the tubular structure extends out of the furnace bottom support from the first through hole, the first channel and the tubular structure form a discharge channel for the glass liquid, and the discharge pipe is provided with a measuring device for measuring its surface temperature T 1 The first temperature sensor, the auxiliary electrode, is provided with a temperature measuring device T 5 a second temperature sensor;

[0009] The upper end of the furnace bottom magnetizer faces the adjacent auxiliary electrode, the lower end of the furnace bottom magnetizer extends out of the furnace bottom support, the external magnetizer is located below the furnace bottom support, the upper end of the external magnetizer faces the lower end of the furnace bottom magnetizer, the lower end of the external magnetizer faces the lower end of the discharge pipe, the first induction coil is sleeved outside the discharge pipe and connected to the first power supply, the second induction coil is sleeved outside the external magnetizer and the second induction coil is connected to the second power supply, the third power supply is connected to the first lead wire and the second lead wire and measures the voltage data and current data of the power supply;

[0010] The first power supply supplies power to start the first induction coil to heat the discharge pipe, and the power of the first power supply is adjusted so that the surface temperature of the discharge pipe is T 1 Subtract the liquidus temperature T of the glass liquid L At 50-260°C, the second temperature sensor measures the temperature T of the auxiliary electrode 5 , temperature T 5 Less than the liquidus temperature T L When the third power supply supplies power to the auxiliary electrode and the discharge pipe, the auxiliary electrode and the discharge pipe act as two electrodes, so that the glass liquid in the discharge channel between the two generates Joule heat under the action of the current, the glass in the discharge pipe melts and flows out, and the furnace is discharged.

[0011] In the method for discharging material from the bottom of a glass melting furnace, when the discharge pipe is blocked, the second power supply is powered, and the external magnetic conductor, the furnace bottom magnetic conductor, the auxiliary electrode, the discharge pipe and the blockage therein constitute an alternating electromagnetic field circuit. The alternating electromagnetic field generated by the second induction coil acts on the blockage to form an induced current and magnetic domain steering to generate Joule heat and hysteresis effect, so that the temperature of the blockage increases and it is converted into liquid before flowing out.

[0012] In the bottom discharge method of a glass melting furnace, the resistivity value Z of the glass liquid in the discharge channel between the auxiliary electrode and the discharge pipe is generated based on the voltage data and the current data, and the theoretical resistivity Z of the glass at the actual measured temperature of the auxiliary electrode is determined based on the relationship curve between the resistivity and temperature of the molten glass. t .

[0013] In the method for discharging material from the bottom of a glass melting furnace, the resistivity value Z / theoretical resistivity Z t ≥0.9, the operating frequency of the second power supply is between 50 Hz and 2 kHz, and the power is between 30 kW and 50 kW.

[0014] In the method for discharging material from the bottom of a glass melting furnace, 0.9 < resistivity value Z / resistivity Z t >0.7, the operating frequency of the second power supply is between 2kHz and 10kHz, and the power is between 15kW-30kW.

[0015] In the method for discharging material from the bottom of a glass melting furnace, the resistivity value Z / theoretical resistivity Z t ≤0.7, the operating frequency of the second power supply is between 20kHz and 100kHz, and the power is between 5kW-15kW.

[0016] In the glass melting furnace bottom discharging method, the operating frequency of the first power supply is between 500 Hz and 30 kHz.

[0017] A discharging device for implementing the bottom discharging method of a glass melting furnace comprises:

[0018] A glass melting pool, which has a conical containing tank for containing molten glass liquid, and a first channel for guiding out the glass liquid is provided at the bottom of the conical containing tank;

[0019] A furnace bottom support, which is supported on the bottom of the glass melting pool, and the furnace bottom support is penetrated by a first through hole aligned with the first channel;

[0020] an auxiliary electrode, which is arranged at the bottom of the conical receiving groove around the first channel, and includes a hole-shaped structure arranged at the center thereof and aligned with the first channel, and a first lead wire;

[0021] A discharge pipe, which is sealed and connected to the bottom support of the melting furnace, the discharge pipe comprises a disc-shaped structure with a sealing cover disposed on the upper surface of the bottom support of the melting furnace, a tubular structure extending downward from the disc-shaped structure, and a second lead wire, the tubular structure extends out of the bottom support of the melting furnace from the first through hole, and the first channel and the tubular structure form a discharge channel for the glass liquid;

[0022] The first temperature sensor measures the surface temperature T of the discharge pipe. 1 ;

[0023] The second temperature sensor measures the auxiliary electrode temperature T 5 ;

[0024] A furnace bottom magnetic conductor, comprising an upper end located in the glass melting pool and facing the adjacent auxiliary electrode and a lower end extending out of the furnace bottom support;

[0025] An external magnetizer is located below the furnace bottom support, with its upper end facing the lower end of the furnace bottom magnetizer, and its lower end facing the lower end of the discharge pipe;

[0026] The first induction coil is detachably mounted on the outside of the discharge pipe and connected to the first power source.

[0027] The second induction coil is detachably mounted on the outside of the external magnetic conductor and is connected to a second power source.

[0028] A third power source is connected to the first lead wire and the second lead wire.

[0029] In the bottom discharge device of the glass melting furnace, the external magnetic conductor or the furnace bottom magnetic conductor is respectively an L-shaped magnetic conductor or a C-shaped magnetic conductor. The first temperature sensor is a non-contact infrared thermometer, and the second temperature sensor is a thermocouple.

[0030] In the bottom discharge device of the glass melting furnace, the auxiliary electrode is externally connected to a gas pipeline so as to use gas to cool the auxiliary electrode.

[0031] In the above technical scheme, a method for discharging material from the bottom of a glass melting furnace provided by the present invention has the following beneficial effects: compared with the prior art, the top of the discharge pipe is pre-buried inside the furnace bottom, and when the furnace is ready to discharge material, the temperature of the glass inside the buffer section at the bottom of the furnace is relatively low and is in a solid state, and the discharge channel between the auxiliary electrode 5 and the discharge pipe 1 is heated by a third power supply and the temperature is controllable, and the temperature of the discharge pipe 1 is heated by a first power supply and the temperature is controllable, thereby avoiding the risk of too low or too high temperature, and the time when the glass liquid starts to flow out can be accurately controlled, thereby avoiding crystallization of the glass and the problem of being unable to discharge material due to a higher solid-liquid transition temperature; when the furnace is ready to stop discharging material, the glass liquid inside the discharge channel is quickly and accurately solidified to avoid the risk of being unable to stop discharging material.

[0032] The present invention forms a first channel and a tubular structure to form a discharge channel for glass liquid. The first induction coil is started by a first power supply to heat the discharge pipe. The power of the first power supply is adjusted so that the surface temperature T 1 Subtract the liquidus temperature T of the glass liquid LThe temperature of the auxiliary electrode is between 50 and 260 °C, which greatly ensures the passability of the glass liquid. Furthermore, the second temperature sensor measures the temperature T 5 , temperature T 5 Less than the liquidus temperature T L When the third power supply supplies power to the auxiliary electrode and the discharge pipe, the auxiliary electrode and the discharge pipe serve as two electrodes, so that the glass liquid in the discharge channel between the two generates Joule heat under the action of electric current, thereby avoiding the solidification of the glass liquid in the discharge channel between the auxiliary electrode and the discharge pipe, and further reducing the risk of blockage of the discharge pipe at the bottom of the glass melting furnace, especially the glass solidification melting furnace. Furthermore, even if the glass liquid contains precious metals, the deposition of precious metals will occur after the furnace has worked for a long time, resulting in discharge blockage. The external magnetic conductor, the furnace bottom magnetic conductor, the auxiliary electrode, the discharge pipe and the blockage therein constitute an alternating electromagnetic field loop. The alternating electromagnetic field generated by the second induction coil acts on the blockage to form an induced current and magnetic domain steering, generating Joule heat and hysteresis effect, so that the temperature of the blockage increases and it is converted into liquid and then flows out. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0034] Figure 1 A schematic diagram of the installation arrangement of a bottom discharge method of a glass melting furnace provided in an embodiment of the present invention.

[0035] Figure 2 A schematic diagram of the normal working state of a bottom discharge method of a glass melting furnace provided in an embodiment of the present invention.

[0036] Figure 3 A schematic diagram of blockage of a discharge channel of a bottom discharge method of a glass melting furnace provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of the present invention, it should be understood that the terms center, longitudinal, lateral, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention 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 invention.

[0041] In addition, the terms first and second are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as first and second may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of multiple is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms such as installation, connection, connection, fixing, etc. should be understood in a broad sense, for example, it can be fixed connection, detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] See also Figure 1-3 As shown, in one embodiment, a method for discharging material from the bottom of a glass melting furnace of the present invention comprises:

[0046] A glass melting pool 4 is installed on the bottom support 3 of the furnace. The glass melting pool 4 contains molten glass liquid 9 and has a first channel for leading out the glass liquid 9 at the bottom. The bottom support 3 of the furnace is provided with a first through hole aligned with the first channel. An auxiliary electrode 5 is arranged on the glass melting pool 4 around the first channel. The auxiliary electrode 5 includes a hole-shaped structure aligned with the first channel and a first lead-out wire arranged at the center thereof. A discharge pipe 1 is sealed and connected to the bottom support 3 of the furnace. The discharge pipe 1 includes a disc-shaped structure with a sealing cover arranged on the upper surface of the bottom support 3 of the furnace, a tubular structure extending downward from the disc-shaped structure, and a second lead-out wire. The tubular structure extends out of the bottom support 3 of the furnace from the first through hole. The first channel and the tubular structure form a discharge channel for the glass liquid 9. The discharge pipe 1 is provided with a temperature measuring device T 1 The first temperature sensor, the auxiliary electrode 5, is provided to measure its temperature T 5 a second temperature sensor;

[0047] The upper end of the furnace bottom magnetizer 7 faces the adjacent auxiliary electrode 5, and the lower end of the furnace bottom magnetizer 7 extends out of the furnace bottom support 3. The external magnetizer 6 is located below the furnace bottom support 3, and its upper end faces the lower end of the furnace bottom magnetizer 7. The lower end of the external magnetizer 6 faces the lower end of the discharge pipe 1. The first induction coil 2 is sleeved on the outside of the discharge pipe 1 and connected to the first power supply. The second induction coil 8 is sleeved on the outside of the external magnetizer 6 and the second induction coil 8 is connected to the second power supply. The third power supply is connected to the first lead wire and the second lead wire and measures the voltage data and current data of the power supply.

[0048] The first power supply is used to start the first induction coil 2 to heat the discharge pipe 1, and the power of the first power supply is adjusted so that the surface temperature T of the discharge pipe 1 1 Subtract the liquidus temperature T of the glass liquid 9 L At 50-260°C, the second temperature sensor measures the temperature T of the auxiliary electrode 5 5 , temperature T 5 Less than the liquidus temperature T L When the third power supply supplies power to the auxiliary electrode 5 and the discharge pipe 1, the auxiliary electrode 5 and the discharge pipe 1 act as two electrodes, so that the glass liquid 9 in the discharge channel between the two generates Joule heat under the action of the current, the glass in the discharge pipe 1 melts and flows out, and the furnace is discharged.

[0049] In a preferred embodiment of the bottom discharging method of a glass melting furnace, when the discharging pipe 1 is blocked, the second power supply is powered, and the external magnetic conductor 6, the furnace bottom magnetic conductor 7, the auxiliary electrode 5, the discharging pipe 1 and the blockage 10 therein constitute an alternating electromagnetic field circuit. The alternating electromagnetic field generated by the second induction coil 8 acts on the blockage 10 to form an induced current and magnetic domain steering to generate Joule heat and hysteresis effect, so that the temperature of the blockage 10 increases and it is converted into liquid and then flows out.

[0050] In a preferred embodiment of the bottom discharge method of a glass melting furnace, the resistivity value Z of the glass liquid 9 in the discharge channel between the auxiliary electrode 5 and the discharge pipe 1 is generated based on the voltage data and the current data, and the theoretical resistivity Z of the glass at the measured temperature of the auxiliary electrode 5 is determined based on the relationship curve between the resistivity and temperature of the molten glass. t .

[0051] In a preferred embodiment of the method for discharging material from the bottom of a glass melting furnace, the resistivity value Z / theoretical resistivity Z t ≥0.9, the operating frequency of the second power supply is between 50 Hz and 2 kHz, and the power is between 30 kW and 50 kW. This ensures the success rate of liquefying the blockage 10 under precious metal deposition or glass crystallization and saves electric energy.

[0052] In a preferred embodiment of the bottom discharge method of a glass melting furnace, 0.9 < resistivity value Z / theoretical resistivity Z t >0.7, the operating frequency of the second power supply is between 2kHz and 10kHz, and the power is between 15kW-30kW, which ensures the success rate of liquefying the blockage 10 under precious metal deposition or glass crystallization and saves electric energy.

[0053] In a preferred embodiment of the method for discharging material from the bottom of a glass melting furnace, the resistivity value Z / theoretical resistivity Z t ≤0.7, the operating frequency of the second power supply is between 20kHz and 100kHz, and the power is between 5kW-15kW, which ensures the success rate of liquefying the blockage 10 under precious metal deposition or glass crystallization and saves electric energy.

[0054] In a preferred embodiment of the bottom discharging method of a glass melting furnace, the operating frequency of the first power supply is between 500 Hz and 30 kHz.

[0055] In a preferred embodiment of the bottom discharge method of a glass melting furnace, the external magnetizer 6 or the furnace bottom magnetizer 7 is an L-shaped magnetizer or a C-shaped magnetizer, respectively.

[0056] In a preferred embodiment of the bottom discharging method of a glass melting furnace, the first temperature sensor is a non-contact infrared thermometer, and the second temperature sensor is a thermocouple.

[0057] In a preferred embodiment of the bottom discharge method of a glass melting furnace, the auxiliary electrode 5 is externally connected to a gas pipeline so as to use gas to cool the auxiliary electrode 5 .

[0058] In one embodiment, the distance between the auxiliary electrode 5 and the discharge pipe 1 is related to the power of the second induction coil 8 .

[0059] In one embodiment, the discharge pipe 1 is configured as an upper disc-shaped structure and a lower tubular structure, with a discharge channel in the center, and the top of the discharge pipe 1 is installed inside the furnace bottom. The first induction coil 2 is sleeved outside the discharge pipe and connected to a first power supply, with an operating frequency between 500 Hz and 30 kHz.

[0060] In one embodiment, the glass melting pool 4 is built of refractory materials, and the inside is molten glass liquid 9. The glass melting pool 8 is installed on the bottom support 3 of the melting furnace. An auxiliary electrode 5 is provided at the bottom of the glass melting pool 8. The center of the auxiliary electrode 5 is a hole-shaped channel, which is directly opposite to the center hole of the discharge pipe 1 to form a discharge channel. The auxiliary electrode 5 is externally connected to a gas pipeline, and gas can be used for electrode cooling. The external magnetic conductor 6 and the furnace bottom magnetic conductor 7 are L-shaped or C-shaped magnetic conductors, and are made of magnetic materials, such as multi-layer magnetic materials or powdered magnetic materials, such as ferrite or iron-based materials.

[0061] In one embodiment, the furnace bottom magnetizer 7 is fixedly installed inside the furnace bottom, with the upper end facing the auxiliary electrode 5, and the external magnetizer 6 is located under the furnace body, with the upper end facing the furnace bottom magnetizer 7, and the lower end facing the lower end of the discharge pipe 1. The second induction coil 8 is sleeved on the outside of the external magnetizer 6. The second induction coil 8 and the external magnetizer 6 are detachable, removed under normal conditions, and installed when needed. The second induction coil 8 is connected to the second power supply, and the operating frequency is a value between 50Hz and 100kHz.

[0062] In one embodiment, the auxiliary electrode 5 is provided with a first lead wire, and the top of the discharge pipe 1 is provided with a second lead wire, and the two lead wires are connected to a third power supply, and the operating frequency is a value between 30Hz and 10kHz. When the third power supply is powered, the auxiliary electrode 5 and the discharge pipe 1 act as two electrodes, and the glass liquid in the middle channel generates Joule heat under the action of the current, so that the glass liquid between the auxiliary electrode 5 and the discharge pipe 1 can be heated. The power supply voltage and current are detected on the third power supply side, and the resistivity value Z of the glass in the middle channel of the auxiliary electrode 5 and the discharge pipe 1 can be calculated. The deposition of precious metals or the crystallization of glass is judged according to the resistivity value Z and the electrode temperature. A non-contact infrared thermometer is installed at the bottom of the furnace to monitor the surface temperature of the discharge pipe 1 in real time. The auxiliary electrode 5 is equipped with a temperature measuring device, such as a thermocouple, to monitor the temperature of the auxiliary electrode 5 in real time.

[0063] In one embodiment, a method for discharging material from the bottom of a glass melting furnace comprises:

[0064] Conventional discharge:

[0065] Induction heating: Start the first power supply of the first induction coil 2, with the power set between 4kW and 50kW, and slowly heat the discharge pipe 1. Adjust the power of the first power supply so that the surface temperature of the discharge pipe 1 is T 1 -Liquidus temperature T of the molten glass L =50-260℃.

[0066] Joule heating: Check the temperature T of the auxiliary electrode 5 5 , if T 5 <T L , the discharge pipe 1 is powered by a third power source to the auxiliary electrode 5 and the discharge pipe 1, and the power is set between 4kW and 40kW. Under the action of high temperature, the glass in the discharge pipe gradually melts and flows out, and the furnace starts to discharge.

[0067] Unconventional discharge:

[0068] If the furnace is blocked and the material cannot be discharged normally, the operation is performed according to the glass resistivity. Based on the relationship curve between the resistivity and temperature of the molten glass, the theoretical resistivity Z of the glass at this temperature is determined according to the actual temperature measured by the auxiliary electrode 5. t , calculate the resistivity value Z of the glass in the middle channel of the auxiliary electrode 5 and the discharge pipe 1 according to the power supply voltage, current and discharge channel diameter detected by the third power supply side. Install the second induction coil 8 and the external magnetic conductor 6, and connect the second induction coil 8 to the second power supply.

[0069] If Z / Z t≥0.9, the operating frequency of the second power supply is set to a value between 50Hz and 2kHz, and the power is maintained between 30kW-50kW. The glass in the discharge channel should melt and flow out within 24 hours, otherwise turn off the second power supply for inspection.

[0070] If 0.9 <Z / Z t >0.7, the operating frequency of the second power supply is set to a value between 2kHz and 10kHz, and the power is maintained between 15kW-30kW. The glass in the discharge channel should melt and flow out within 15 hours, otherwise turn off the second power supply for troubleshooting.

[0071] If Z / Z t ≤0.7, the operating frequency of the second power supply is set to a value between 20kHz and 100kHz, the power is set between 5kW-15kW, and the power supply is suspended for 10 minutes after every 30 minutes of power supply. The glass in the discharge channel should melt and flow out within 10 hours, otherwise the second power supply is turned off for inspection.

[0072] When the second power supply is working, the external magnetic conductor 6, the furnace bottom magnetic conductor 7, the auxiliary electrode 5, the discharge pipe 1, and the blockage 10 form an alternating electromagnetic field circuit. The alternating electromagnetic field generated by the second induction coil 8 acts on the blockage 10, forming an induced current and magnetic domain steering, generating Joule heat and hysteresis effect, causing the temperature of the blockage 10 to rise, convert into liquid and then flow out.

[0073] In addition, a discharging device for implementing the bottom discharging method of a glass melting furnace is provided, comprising:

[0074] A glass melting pool, which has a conical containing tank for containing molten glass liquid, and a first channel for guiding out the glass liquid is provided at the bottom of the conical containing tank;

[0075] A furnace bottom support, which is supported on the bottom of the glass melting pool, and the furnace bottom support is penetrated by a first through hole aligned with the first channel;

[0076] an auxiliary electrode, which is arranged at the bottom of the conical receiving groove around the first channel, and includes a hole-shaped structure arranged at the center thereof and aligned with the first channel, and a first lead wire;

[0077] A discharge pipe, which is sealed and connected to the bottom support of the melting furnace, the discharge pipe comprises a disc-shaped structure with a sealing cover disposed on the upper surface of the bottom support of the melting furnace, a tubular structure extending downward from the disc-shaped structure, and a second lead wire, the tubular structure extends out of the bottom support of the melting furnace from the first through hole, and the first channel and the tubular structure form a discharge channel for the glass liquid;

[0078] The first temperature sensor measures the surface temperature T of the discharge pipe. 1 ;

[0079] The second temperature sensor measures the auxiliary electrode temperature T 5 ;

[0080] A furnace bottom magnetic conductor, comprising an upper end located in the glass melting pool and facing the adjacent auxiliary electrode and a lower end extending out of the furnace bottom support;

[0081] An external magnetizer is located below the furnace bottom support, with its upper end facing the lower end of the furnace bottom magnetizer, and its lower end facing the lower end of the discharge pipe;

[0082] The first induction coil is detachably mounted on the outside of the discharge pipe and connected to the first power source.

[0083] The second induction coil is detachably mounted on the outside of the external magnetic conductor and is connected to a second power source.

[0084] A third power source is connected to the first lead wire and the second lead wire.

[0085] Finally, it should be noted that the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present application.

[0086] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A method for discharging material from the bottom of a glass melting furnace, It is characterized in that It includes the following steps: A glass melting pool is installed on a furnace bottom support, the glass melting pool contains molten glass liquid and has a first channel for leading out the glass liquid at the bottom, the furnace bottom support is provided with a first through hole aligned with the first channel, an auxiliary electrode is arranged in the glass melting pool around the first channel, the auxiliary electrode includes a hole-shaped structure aligned with the first channel and a first lead-out wire arranged at the center thereof, a discharge pipe is sealed and connected to the furnace bottom support, the discharge pipe includes a disc-shaped structure with a sealing cover arranged on the upper surface of the furnace bottom support, a tubular structure extending downward from the disc-shaped structure and a second lead-out wire, the tubular structure extends out of the furnace bottom support from the first through hole, the first channel and the tubular structure form a discharge channel for the glass liquid, and the discharge pipe is provided with a measuring device for measuring its surface temperature T 1 The first temperature sensor, the auxiliary electrode, is provided with a temperature measuring device T 5 a second temperature sensor; The upper end of the furnace bottom magnetizer faces the adjacent auxiliary electrode, the lower end of the furnace bottom magnetizer extends out of the furnace bottom support, the external magnetizer is located below the furnace bottom support, the upper end of the external magnetizer faces the lower end of the furnace bottom magnetizer, the lower end of the external magnetizer faces the lower end of the discharge pipe, the first induction coil is sleeved outside the discharge pipe and connected to the first power supply, the second induction coil is sleeved outside the external magnetizer and the second induction coil is connected to the second power supply, the third power supply is connected to the first lead wire and the second lead wire and measures the voltage data and current data of the power supply; The first power supply supplies power to start the first induction coil to heat the discharge pipe, and the power of the first power supply is adjusted so that the surface temperature of the discharge pipe is T 1 Subtract the liquidus temperature T of the glass liquid L At 50-260°C, the second temperature sensor measures the temperature T of the auxiliary electrode 5 , temperature T 5 Less than the liquidus temperature T L When the discharge pipe is blocked, the second power supply supplies power to the auxiliary electrode and the discharge pipe, and the auxiliary electrode and the discharge pipe serve as two electrodes, so that the glass liquid in the discharge channel between the two generates Joule heat under the action of the current, and the glass in the discharge pipe melts and flows out, and the furnace is discharged. When the discharge pipe is blocked, the second power supply supplies power, and the external magnetic conductor, the furnace bottom magnetic conductor, the auxiliary electrode, the discharge pipe and the blockage therein constitute an alternating electromagnetic field circuit. The alternating electromagnetic field generated by the second induction coil acts on the blockage to form an induced current and magnetic domain steering to generate Joule heat and hysteresis effect, so that the temperature of the blockage increases and is converted into liquid and then flows out. The auxiliary electrode is externally connected to a gas pipeline to use gas to cool the auxiliary electrode. The distance between the auxiliary electrode and the discharge pipe is related to the power of the second induction coil.

2. A method for discharging material from the bottom of a glass melting furnace according to claim 1, It is characterized in that The resistivity value Z of the glass liquid in the discharge channel between the auxiliary electrode and the discharge pipe is generated based on the voltage data and the current data. Based on the relationship curve between the resistivity and temperature of the molten glass, the theoretical resistivity Z of the glass at the auxiliary electrode actual temperature is determined according to the auxiliary electrode actual temperature. t .

3. A method for discharging material from the bottom of a glass melting furnace according to claim 2, It is characterized in that Resistivity value Z / Theoretical resistivity Z t ≥0.9, the operating frequency of the second power supply is between 50 Hz and 2 kHz, and the power is between 30 kW and 50 kW.

4. A method for discharging material from the bottom of a glass melting furnace according to claim 2, It is characterized in that 0.9<Resistivity value Z / Resistivity Z t >0.7, the operating frequency of the second power supply is between 2kHz and 10kHz, and the power is between 15kW-30kW.

5. A method for discharging material from the bottom of a glass melting furnace according to claim 2, It is characterized in that Resistivity value Z / Theoretical resistivity Z t ≤0.7, the operating frequency of the second power supply is between 20kHz and 100kHz, and the power is between 5kW-15kW.

6. A method for discharging material from the bottom of a glass melting furnace according to claim 1, It is characterized in that The operating frequency of the first power supply is between 500 Hz and 30 kHz.

7. A discharging device for implementing the bottom discharging method of a glass melting furnace according to any one of claims 1 to 6, It is characterized in that These include, A glass melting pool, which has a conical containing tank for containing molten glass liquid, and a first channel for guiding out the glass liquid is provided at the bottom of the conical containing tank; A furnace bottom support, which is supported on the bottom of the glass melting pool, and the furnace bottom support is penetrated by a first through hole aligned with the first channel; an auxiliary electrode, which is arranged at the bottom of the conical receiving groove around the first channel, and includes a hole-shaped structure arranged at the center thereof and aligned with the first channel, and a first lead wire; A discharge pipe, which is sealed and connected to the bottom support of the melting furnace, the discharge pipe comprises a disc-shaped structure with a sealing cover disposed on the upper surface of the bottom support of the melting furnace, a tubular structure extending downward from the disc-shaped structure, and a second lead wire, the tubular structure extends out of the bottom support of the melting furnace from the first through hole, and the first channel and the tubular structure form a discharge channel for the glass liquid; A first temperature sensor, which measures the surface temperature of the discharge pipe; a second temperature sensor, which measures the temperature of the auxiliary electrode; A furnace bottom magnetic conductor, comprising an upper end located in the glass melting pool and facing the adjacent auxiliary electrode and a lower end extending out of the furnace bottom support; An external magnetizer is located below the furnace bottom support, with its upper end facing the lower end of the furnace bottom magnetizer, and its lower end facing the lower end of the discharge pipe; The first induction coil is detachably mounted on the outside of the discharge pipe and connected to the first power source. The second induction coil is detachably mounted on the outside of the external magnetic conductor and is connected to a second power source. A third power source is connected to the first lead wire and the second lead wire.

8. The discharging device according to claim 7, It is characterized in that The external magnetic conductor or the furnace bottom magnetic conductor is an L-shaped magnetic conductor or a C-shaped magnetic conductor respectively, the first temperature sensor is a non-contact infrared thermometer, and the second temperature sensor is a thermocouple.

Images