Method and system for propelling tin electrode of LTPS substrate glass kiln

Abstract

The invention relates to the technical field of glass production, in particular to a tin electrode propelling method and system for an LTPS substrate glass kiln, and the method comprises the steps: calculating the predicted propelling amount of each electrode according to the loss ratio of each electrode to all electrodes; meanwhile, the actual propulsion amount of the electrode is determined according to the working temperature and the loss ratio of the electrode, on one hand, it can be guaranteed that the electrode in the rear area of the kiln is over-propelled and under-propelled, so that it is avoided that excessive joule heat is generated due to inward shrinkage of the electrode and high-temperature molten glass erodes the interior of the kiln pool wall, the service life of the electrode and the service life of the kiln pool wall are guaranteed, and the actual production requirement is met; on the other hand, electrode over-pushing in the front area of the kiln is avoided, electrode consumption is reduced, cost is reduced, the contact area between the electrode and a material mountain is reduced, stable and reliable production is guaranteed, the service life of the electrode is prolonged, and cost is reduced; and finally, the length of each electrode is determined according to the actual propulsion amount, so that each electrode can be synchronously replaced, and the influence frequency of electrode replacement on glass production is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of glass production, and particularly to a method and system for advancing tin electrodes of an LTPS substrate glass furnace. Background Art

[0002] Glass products have always had extensive applications in the display field. From the traditional color picture tube industry to the current flat panel display industry, glass has always played a key role as a key component in display devices. With the improvement of the requirements for display quality, it has gradually developed from traditional TFT-LCD substrate glass to high-resolution LTPS substrate glass obtained by high-temperature processes.

[0003] With a significant increase in the melting temperature of the furnace, the erosion rate of the electrodes at the hot spot position and the furnace sidewall has increased, and the electrode erosion rate is often greater than that of the furnace sidewall. This results in the end of the electrode shrinking inside the furnace sidewall after excessive erosion. At the same time, due to the increase in the operating temperature of the electrode, the Joule heat caused by current aggregation increases, eroding the inside of the furnace sidewall, further increasing the erosion rate of the furnace sidewall and reducing its service life.

[0004] Although the Chinese invention patent application with the application number 202311803522.0 provides an automatic compensation system and method for electrodes of a TFT glass furnace, and advances the electrodes regularly through an electrode advancing mechanism according to the calculated electrode advancing amount. Although pushing the electrodes can avoid the erosion of the furnace sidewall caused by electrode shrinkage, the existing electrode advancing method can neither effectively ensure that the electrode advancing amount in the rear area of the furnace meets the consumption amount, nor will it cause the electrode advancing amount in the front area of the furnace to be too large, increasing costs and causing the electrode to contact the charge mountain, affecting production. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and system for advancing tin electrodes of an LTPS substrate glass furnace to solve the technical problem that the electrode advancement of the current LTPS substrate glass furnace reduces the service life of the furnace sidewall.

[0006] The solution of the present invention to the above technical problem: A method for advancing tin electrodes of an LTPS substrate glass furnace includes the following steps: S1. Obtain the loss amount of all electrodes during the operation cycle and determine the loss ratio of each electrode; S2. Determine the loss amount of all electrodes by measuring the tin content in the glass products within a set time; S3. Determine the predicted advancement amount of each electrode within the set time according to the loss amount of all electrodes and the loss ratio of each electrode; S4. Set the over - propulsion condition, and determine whether each electrode meets the over - propulsion condition. If so, execute step S5; if not, execute step S6; S5. Set the actual propulsion amount of the corresponding electrode, and determine the initial length of the corresponding electrode according to the actual propulsion amount, where the actual propulsion amount is greater than the predicted propulsion amount of the corresponding electrode; S6. Set the actual propulsion amount of the corresponding electrode, and determine the initial length of the corresponding electrode according to the actual propulsion amount, where the actual propulsion amount is less than the predicted propulsion amount of the corresponding electrode.

[0007] Further defined, step S1 includes: S1.1. Obtain the loss amount of each electrode during the operation cycle ; S1.2. Determine the loss ratio of each electrode :

[0008] Wherein, is the loss ratio of the th electrode, is the loss amount of the th electrode during the operation cycle, is the number of electrodes.

[0009] Further defined, step S2 is specifically: S2.1. Measure the content of tin oxide in the glass product within a set time by inductively coupled plasma spectroscopy ; S2.2. Obtain the content of tin oxide in the raw materials of the corresponding glass product ; S2.3. Determine the volatilization rate of tin oxide in the raw materials of the glass product and the volatilization rate of all electrodes within the set time and the volatilization rate of all electrodes ; S2.4. Calculate the loss amount of all electrodes within the set time :

[0010] Wherein, and both have a value range of 4% - 6%.

[0011] Further defined, the over - propulsion condition is: whether the operating temperature of the electrode reaches the critical temperature value of the cell wall and whether the electrode loss ratio reaches the critical value of electrode loss; Step S4 is specifically: if both the operating temperature and the loss ratio of the electrode meet the over - propulsion condition, execute step S5; if not, execute step S6.

[0012] Further defined, the step S5 includes: S5.1. Determine the actual advancement amount of the electrodes that meet the over-advancement condition according to the predicted advancement amount of the electrodes:

[0013]

[0014] Wherein, is the advancement coefficient of the electrodes that meet the over-advancement condition, and its value range is 1.01 to 1.05, is the predicted advancement amount of the electrodes that meet the over-advancement condition, are the electrodes that meet the over-advancement condition; S5.2. Determine the initial length of the electrodes that meet the over-advancement condition according to the actual advancement amount :

[0015] Wherein, is the replacement cycle of the electrodes.

[0016] Further defined, the step S6 includes: S6.1. Determine the actual advancement amount of the electrodes that do not meet the over-advancement condition according to the predicted advancement amount of the electrodes:

[0017]

[0018] Wherein, is the advancement coefficient of the electrodes that do not meet the over-advancement condition, and its value range is 0.91 to 1, is the predicted advancement amount of the electrodes that do not meet the over-advancement condition; S6.2. Determine the initial length of the electrodes that do not meet the over-advancement condition according to the actual advancement amount :

[0019] Wherein, is the replacement cycle of the electrodes.

[0020] An LTPS substrate glass furnace tin electrode advancement system includes: An electrode loss ratio calculation module, configured to obtain the loss amounts of all electrodes during the operation cycle and determine the loss ratio of each electrode; An electrode loss amount calculation module, configured to determine the loss amounts of all electrodes by measuring the tin content in the glass products within a set time. An electrode predicted advancement amount calculation module, configured to determine the predicted advancement amount of each electrode within a set time according to the loss amounts of all electrodes and the loss proportion of each electrode; An electrode advancement judgment module, configured to judge whether each electrode meets the over-advancement condition. If so, execute the rear area advancement module; if not, execute the front area advancement module; A rear area advancement module, configured to set the actual advancement amount of the corresponding electrode, and determine the initial length of the corresponding electrode according to the actual advancement amount, where the actual advancement amount is greater than the predicted advancement amount of the corresponding electrode; A front area advancement module, configured to set the actual advancement amount of the corresponding electrode, and determine the initial length of the corresponding electrode according to the actual advancement amount, where the actual advancement amount is less than the predicted advancement amount of the corresponding electrode.

[0021] Further defined, the electrode loss proportion calculation module includes: An electrode loss amount acquisition unit, configured to obtain the loss amount of each electrode within an operation cycle ; An electrode loss proportion calculation unit, configured to calculate the loss proportion of each electrode according to the loss proportion of the th electrode and the loss amount of the th electrode within the operation cycle, where , is the number of electrodes.

[0022] Further defined, the electrode loss amount calculation module includes: An indium tin oxide content acquisition unit in the glass product, configured to measure the indium tin oxide content in the glass product within a set time by inductively coupled plasma spectroscopy ; An indium tin oxide content acquisition unit in the glass product raw material, configured to acquire the indium tin oxide content in the corresponding glass product raw material ; An electrode total loss amount calculation unit, configured to calculate the loss amounts of all electrodes within a set time according to , where , is the volatilization rate of indium tin oxide in the glass product raw material, is the volatilization rate of all electrodes, and both have a value range of 4% - 6%.

[0023] Further defined, the over-advancement condition is: whether the electrode operating temperature reaches the cell wall critical temperature value and whether the electrode loss proportion reaches the electrode loss critical value; The rear area advancement module includes: The rear zone actual advancement amount calculation unit is used to calculate the actual advancement amount of the electrodes that meet the over-advancement condition according to and ; Among them, is the advancement coefficient of the electrodes that meet the over-advancement condition, and its value range is 1.01 to 1.05, is the predicted advancement amount of the electrodes that meet the over-advancement condition; The rear zone electrode initial length calculation unit is used to calculate the initial length of the electrodes that meet the over-advancement condition according to ; , is the replacement cycle of the electrodes; The front zone advancement module includes: The front zone actual advancement amount calculation unit is used to calculate the actual advancement amount of the electrodes that do not meet the over-advancement condition according to and ; Among them, is the advancement coefficient of the electrodes that do not meet the over-advancement condition, and its value range is 0.91 to 1, is the predicted advancement amount of the electrodes that do not meet the over-advancement condition; The front zone electrode initial length calculation unit is used to calculate the initial length of the electrodes that do not meet the over-advancement condition according to ; , is the replacement cycle of the electrodes.

[0024] The beneficial effects of the present invention are as follows: The present invention calculates the predicted advancement amount of each electrode based on the proportion of the loss of each electrode compared to all electrodes; at the same time, according to the working temperature of the electrode and the proportion of the loss, the actual advancement amount of the electrode is determined. On the one hand, it can ensure that the electrodes in the rear zone of the kiln are over-pushed and avoid under-pushing, thereby avoiding excessive Joule heat generated by the electrodes retracting and the erosion of the high-temperature glass liquid on the inner wall of the kiln furnace, ensuring the service life of the electrodes and the kiln furnace wall, and meeting the actual production requirements; on the other hand, it avoids over-pushing of the electrodes in the front zone of the kiln, thereby reducing electrode consumption, reducing costs, reducing the contact area between the electrodes and the charge mountain, ensuring stable and reliable production, increasing the service life of the electrodes, and reducing costs; finally, the length of each electrode is determined according to the actual advancement amount, so that each electrode can be replaced synchronously, reducing the number of times the electrode replacement affects the glass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a flowchart of the method for advancing the tin electrodes in the LTPS substrate glass kiln of the present invention; Figure 2This is a schematic diagram of the tin electrode propulsion system for the LTPS substrate glass furnace of the present invention. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1 Reference Figure 1 , the present invention provides a method for propelling a tin electrode of an LTPS substrate glass furnace, including S1. Obtain the loss amounts of all electrodes during the operation cycle, and determine the loss ratio of each electrode; S2. Determine the loss amounts of all electrodes by measuring the tin content in the glass product within a set time; S3. Determine the predicted propulsion amount of each electrode within the set time according to the loss amounts of all electrodes and the loss ratio of each electrode; S4. Set the over - propulsion condition, and determine whether each electrode reaches the over - propulsion condition. If so, execute step S5; if not, execute step S6; S5. Set the actual propulsion amount of the corresponding electrode, and determine the initial length of the corresponding electrode according to the actual propulsion amount, and the actual propulsion amount is greater than the predicted propulsion amount of the corresponding electrode; S6. Set the actual propulsion amount of the corresponding electrode, and determine the initial length of the corresponding electrode according to the actual propulsion amount, and the actual propulsion amount is less than the predicted propulsion amount of the corresponding electrode.

[0028] Further explanation, step S1 includes: S1.1. Obtain the loss amount of each electrode during the operation cycle ; Specifically, due to the different positions of the electrodes in the furnace, the corresponding operating temperatures are different, and the flow rates of the glass liquid are different. Therefore, the loss amounts of each electrode in the furnace are different. After the operation cycle is completed, the furnace is disassembled, and then the loss amount of each electrode during the operation cycle is obtained by weighing the remaining electrodes or measuring the lengths of the remaining electrodes.

[0029] S1.2. Determine the loss ratio of each electrode :

[0030] Among them, is the loss ratio of the th electrode, is the loss of the th electrode during the operation cycle, is the number of electrodes; Specifically, obtain the total loss of all electrodes during the operation cycle, and then determine the loss percentage of each electrode.

[0031] For example, according to different processes, the number of electrodes in the LTPS substrate glass furnace is different. When = 6, the working temperature and loss percentage of each electrode are shown in Table 1: Table 1 Operating condition data of 6 electrodes in the LTPS substrate glass furnace

[0032] When = 8, the working temperature and loss percentage of each electrode are shown in Table 2: Table 2 Operating condition data of 8 electrodes in the LTPS substrate glass furnace

[0033] It can be seen from Table 1 and Table 2 that there is no direct correlation between the loss percentage of the electrode and its working temperature.

[0034] Furthermore, step S2 is specifically as follows: S2.1. Measure the content of tin oxide in the glass product within the set time by inductively coupled plasma spectroscopy .

[0035] S2.2. Obtain the content of tin oxide in the corresponding glass product raw material .

[0036] S2.3. Determine the volatilization rate of tin oxide in the glass product raw material and the volatilization rate of all electrodes within the set time and .

[0037] S2.4. Calculate the loss of all electrodes within the set time :

[0038] wherein, and both have a value range of 4% - 6%.

[0039] Specifically, by obtaining the content of tin oxide in the glass product , the content of tin oxide in the glass product raw material and the content of volatilized and lost tin oxide, the loss of tin oxide of all electrodes within the set time is calculated.

[0040] Volatilization rate and the volatilization rate are given empirical values according to the actual production process.

[0041] Further explanation: Step S3 is specifically as follows: By , the predicted advancement of each electrode within a set time can be obtained: , is the predicted advancement of the th electrode.

[0042] Further explanation: Step S4 is specifically as follows: Since there are mainly material mountains distributed in the front area of the LTPS substrate glass furnace, the flow rate of the glass solution is relatively slow. Although the temperature change gradient of the electrodes in the front area is relatively large, the temperature in the front area is lower than the temperature at the hot spot position in the rear area. Therefore, the erosion of the electrodes in the front area is slow, and the electrodes are not easily retracted into the furnace wall; and even if the electrodes in the front area are eroded and retracted into the furnace wall, the Joule heat generated by them is relatively low, and the temperature of the glass melt outside the electrodes in the front area is relatively stable and lower than that in the rear area, resulting in the erosion of the furnace wall by the retraction of the electrodes in the front area being not obvious. Therefore, the erosion effect on the furnace wall due to the electrode advancement being slightly less than the consumption in the front area of the LTPS substrate glass furnace can be ignored.

[0043] On the contrary, the rear area of the LTPS substrate glass furnace is mainly fully melted glass melt, the temperature of the glass melt is high, and the flow rate of the glass melt increases. Therefore, the erosion loss of the electrodes in the rear area is more obvious; when the advancement is less than the loss, the phenomenon of electrode retraction is very likely to occur. At this time, under the influence of the scouring of the glass melt in the furnace wall, the high-temperature environment, and the higher Joule heat generated by current aggregation in the furnace wall of the LTPS substrate glass furnace, the erosion is more serious and prominent, significantly reducing the service life of the furnace wall and affecting the production efficiency and production quality.

[0044] Therefore, by judging whether the operating temperature of the electrode reaches the critical temperature value of the furnace wall and whether the electrode loss ratio reaches the set critical electrode loss value, it is determined whether the electrode over-advances or under-advances during actual advancement.

[0045] For example, when = 6, according to the empirical value, the critical temperature value of the furnace wall is taken as 1600 °C, and the critical electrode loss value is taken as 15%; therefore, electrodes 1 and 2 do not meet the over-advancement condition, and electrodes 3 to 6 meet the over-advancement condition.

[0046] When = 8, according to the empirical value, the critical temperature value of the furnace wall is taken as 1640 °C, and the critical electrode loss value is taken as 11%; therefore, electrodes 1 to 3 do not meet the over-advancement condition, and electrodes 4 to 8 meet the over-advancement condition.

[0047] Meanwhile, when When \(n = 6\), both electrode 1 and electrode 2 are in the batch mountain area, while electrodes 3 to 6 are all in the molten glass area; similarly, when \(n = 8\), electrodes 1 to 3 are all in the batch mountain area, while electrodes 4 to 8 are all in the molten glass area. In the LTPS substrate glass furnace, the batch mountain area is the front area, and the molten glass area is the rear area. Therefore, it can also be simply judged according to the area where the electrode is located. If the electrode is in the front area, step S6 is executed; if the electrode is in the rear area, step S5 is executed.

[0048] Furthermore, step S5 includes: S5.1. Determine the actual advancement amount of the electrode that reaches the over-advancement condition according to the predicted advancement amount of the electrode:

[0049]

[0050] Among them, \(k\) is the advancement coefficient of the electrode that reaches the over-advancement condition, and the value range of \(k\) is 1.05 to 1.2, \(x\) is the predicted advancement amount of the electrode that reaches the over-advancement condition; Specifically, since there is a hot spot electrode (the electrode with the highest operating temperature) in the rear area of the LTPS substrate glass furnace, the temperature of the glass liquid on its periphery is relatively high. At the same time, the flow rate of the glass liquid in the rear area of the LTPS substrate glass furnace increases. Although the operating temperature of the electrode near the liquid discharge hole decreases, the temperature of the glass liquid at its position is high and the flow rate is fast, and the erosion will also increase. Therefore, the advancement coefficient of each electrode located in the rear area of the LTPS substrate glass furnace is different, and the advancement coefficient of each electrode is greater than 1. The specific advancement coefficient is determined according to the empirical value, so as to finally obtain the actual advancement amount of the corresponding electrode within the set time, and avoid the inner shrinkage of the electrode due to insufficient advancement, which affects the service life of the furnace wall.

[0051] In actual production, the electrode advancement device can be used to uniformly advance the electrode according to the actual advancement amount of the corresponding electrode within the set time, or it can also be selected to advance the corresponding actual advancement amount within the specified time; for example, the set time is 1 month, and it can be advanced within 1 month according to uniformly advance the corresponding electrode, or it can also be selected to complete the advancement of the corresponding length electrode within 5 days.

[0052] S5.2. Determine the initial length of the electrode that reaches the over-advancement condition according to the actual advancement amount :

[0053] Among them, \(T\) is the replacement cycle of the electrode; Specifically, since the actual advancement amount of the electrodes in the rear area of the LTPS substrate glass furnace is greater than that of the electrodes in the front area of the LTPS substrate glass furnace, if electrodes of the same length are usually selected for use currently, it will lead to an increase in the replacement frequency of the electrodes in the rear area of the LTPS substrate glass furnace, and the replacement frequencies of the electrodes in the front area and the rear area of the LTPS substrate glass furnace are out of sync, which is likely to cause frequent shutdowns of the LTPS substrate glass furnace, affecting the production efficiency and quality of glass and unable to meet the actual production requirements; therefore, according to the replacement cycle of the electrodes, for example, 5 years, the length of each electrode in the rear area of the LTPS substrate glass furnace is calculated as 5×12 months = 70 months.

[0054] Further illustration, step S6 includes: S6.1. Determine the actual advancement amount of the electrodes that do not reach the over-advancement condition according to the predicted advancement amount of the electrodes:

[0055]

[0056] Wherein, is the advancement coefficient of the electrodes that do not reach the over-advancement condition, is the predicted advancement amount of the electrodes that do not reach the over-advancement condition, The value range is 0.85 - 1; Specifically, although the temperature change gradient in the front area of the LTPS substrate glass furnace is relatively large, it is lower than the critical value of the pool wall, so the influence of temperature change on electrode erosion loss is relatively small but cannot be ignored; at the same time, the flow rate of the glass melt on the circumferential side of the electrodes closer to the rear area of the LTPS substrate glass furnace gradually increases, so the erosion loss rates of the electrodes at different positions in the front area of the LTPS substrate glass furnace are different, and their advancement coefficients are different; the advancement coefficients of the corresponding electrodes can be determined according to empirical values.

[0057] Therefore, compared with the existing electrode advancement scheme, by unifying the advancement amount of each electrode, on the one hand, the present invention can reduce the advancement amount of the electrodes in the front area of the LTPS substrate glass furnace, avoid excessive advancement amount and increased contact area with the batch mountain, affect the electrode life, and at the same time reduce electrode consumption and cost; on the other hand, it can ensure over-advancement of the electrodes in the rear area of the LTPS substrate glass furnace, avoid erosion loss of the furnace pool wall caused by electrode retraction, meet the actual production requirements, and ensure stable and reliable production of LTPS substrate glass.

[0058] For example, when = 6, the advancement amounts of each electrode are shown in Table 3: Table 3 Advancement amounts of 6 electrodes of the LTPS substrate glass furnace

[0059] When When = 8, the advancement amounts of each electrode are shown in Table 4: Table 4 Advancement amounts of 8 electrodes of the LTPS substrate glass furnace

[0060] S6.2. Determine the initial length of the electrodes that do not meet the over-advancement condition according to the actual advancement amount :

[0061] Among them, is the replacement cycle of the electrode.

[0062] Specifically, by setting a unified replacement cycle for the tin electrodes of the LTPS substrate glass furnace and determining the actual length of each electrode, it can not only ensure that the advancement of the electrodes does not affect the production efficiency and quality, but also improve the service life of the furnace wall and meet the actual production requirements.

[0063] Embodiment 2 Reference Figure 2 , this embodiment provides a tin electrode advancement system for an LTPS substrate glass furnace, including: An electrode loss ratio calculation module, configured to obtain the loss amounts of all electrodes during the operation cycle and determine the loss ratio of each electrode; An electrode loss amount calculation module, configured to determine the loss amounts of all electrodes by measuring the tin content in the glass products within a set time; An electrode predicted advancement amount calculation module, configured to determine the predicted advancement amount of each electrode within a set time according to the loss amounts of all electrodes and the loss ratio of each electrode; An electrode advancement judgment module, configured to judge whether each electrode meets the over-advancement condition. If so, execute the rear area advancement module; if not, execute the front area advancement module; the over-advancement condition is: whether the operating temperature of the electrode reaches the critical temperature value of the furnace wall and whether the loss ratio of the electrode reaches the critical loss value of the electrode; A rear area advancement module, configured to set the actual advancement amount of the corresponding electrode and determine the initial length of the corresponding electrode according to the actual advancement amount, and the actual advancement amount is greater than the predicted advancement amount of the corresponding electrode; A front area advancement module, configured to set the actual advancement amount of the corresponding electrode and determine the initial length of the corresponding electrode according to the actual advancement amount, and the actual advancement amount is less than the predicted advancement amount of the corresponding electrode.

[0064] Further limited, the electrode loss ratio calculation module includes: An electrode loss amount acquisition unit, configured to obtain the loss amount of each electrode during the operation cycle ; The electrode loss ratio calculation unit is used to calculate the loss ratio of each electrode according to the loss ratio of the th electrode and the loss amount of the th electrode during the operation cycle , where

[0065] is the number of electrodes. Furthermore, the electrode loss amount calculation module includes: The tin oxide content acquisition unit in the glass product is used to measure the content of tin oxide in the glass product within a set time by inductively coupled plasma spectroscopy ; The tin oxide content acquisition unit of the glass product raw material is used to acquire the content of tin oxide in the corresponding glass product raw material ; The total electrode loss amount calculation unit is used to calculate the loss amount of all electrodes within a set time according to , is the volatilization rate of tin oxide in the glass product raw material, is the volatilization rate of all electrodes, and both have a value range of 4% - 6%.

[0066] Furthermore, the rear area propulsion module includes: The rear area actual propulsion amount calculation unit is used to calculate the actual propulsion amount of the electrodes that meet the over - propulsion condition according to and ; Among them, is the propulsion coefficient of the electrodes that meet the over - propulsion condition, has a value range of 1.01 - 1.05, is the predicted propulsion amount of the electrodes that meet the over - propulsion condition; The rear area electrode initial length calculation unit is used to calculate the initial length of the electrodes that meet the over - propulsion condition according to , is the replacement cycle of the electrodes.

[0067] Furthermore, the front area propulsion module includes: The front area actual propulsion amount calculation unit is used to calculate the actual propulsion amount of the electrodes that do not meet the over - propulsion condition according to and ; Among them, is the propulsion coefficient of the electrodes that do not meet the over - propulsion condition, has a value range of 0.91 - 1, ​The predicted propulsion amount of the electrode that does not meet the overpropulsion condition; The front-region electrode initial length calculation unit is configured to, according to calculate the initial length of the electrode that does not meet the overpropulsion condition , is the replacement period of the electrode.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

Claims

1. A method for advancing tin electrodes in a LTPS substrate glass furnace, characterized in that: The following steps are involved: S1. Obtain the loss of all electrodes during the operation cycle and determine the loss ratio of each electrode; S2. Determine the loss of all electrodes by measuring the tin content in the glass product within a set time; S3, determining the predicted propulsion amount of each electrode within a set time according to the loss amount of all electrodes and the loss proportion of each electrode; S4, setting the over-promotion condition, judging whether each electrode reaches the over-promotion condition, if so, executing step S5; if not, executing step S6; S5, setting an actual advancement amount of the corresponding electrode, and determining an initial length of the corresponding electrode according to the actual advancement amount, wherein the actual advancement amount is greater than a predicted advancement amount of the corresponding electrode; S6. Setting an actual advancement amount of the corresponding electrode, and determining an initial length of the corresponding electrode according to the actual advancement amount, wherein the actual advancement amount is smaller than a predicted advancement amount of the corresponding electrode.

2. The LTPS substrate glass furnace tin electrode advancement method according to claim 1, characterized in that: The step S1 comprises: S1.

1. Obtain the loss of each electrode during the operation cycle ; S1.

2. Determine the loss ratio of each electrode : in, For the The loss ratio of each electrode is For the The amount of loss of each electrode during the operation cycle, is the number of electrodes.

3. The LTPS substrate glass furnace tin electrode advancing method according to claim 2, characterized in that: The step S2 is specifically as follows: S2.

1. Measure the tin oxide content in glass products within a set time by electron coupled plasma spectroscopy ; S2.

2. Obtain the content of tin oxide in the raw materials of the corresponding glass products ; S2.

3. Determine the volatilization rate of tin oxide in glass product raw materials within a set time and the volatility of all electrodes ; S2.

4. Calculate the loss of all electrodes within the set time : in, and The value range is 4%~6%.

4. The LTPS substrate glass furnace tin electrode advancing method according to any one of claims 1 to 3, characterized in that: The over-propelling condition is: whether the electrode operating temperature reaches the critical temperature value of the pool wall, and whether the electrode loss ratio reaches the electrode loss critical value; The step S4 is specifically as follows: if both the electrode operating temperature and the loss ratio reach the over-promotion condition, then executing step S5; if not, then executing step S6.

5. The LTPS substrate glass furnace tin electrode advancing method according to claim 3, characterized in that: The step S5 comprises: S5.

1. Determine the actual propulsion amount of the electrode that reaches the over-propulsion condition based on the predicted propulsion amount of the electrode: in, To achieve the overdrive condition, the propulsion coefficient of the electrode is The value range is 1.01~1.

05. To achieve the predicted propulsion of the electrode under the overpromotion condition, Electrodes for achieving overdrive conditions; S5.

2. Determine the initial length of the electrode that reaches the over-propelling condition based on the actual propulsion amount : in, is the replacement period of the electrode.

6. The LTPS substrate glass furnace tin electrode advancing method according to claim 3, characterized in that: The step S6 comprises: S6.

1. Determine the actual propulsion amount of the electrode that does not reach the over-propulsion condition based on the predicted propulsion amount of the electrode: in, is the propulsion coefficient of the electrode that does not reach the over-propulsion condition, The value range is 0.91~1. The predicted advancement amount of the electrode that does not reach the over-advancement condition; S6.

2. Determine the initial length of the electrode that does not reach the over-advancement condition based on the actual advancement amount : in, is the replacement period of the electrode.

7. A LTPS substrate glass furnace tin electrode advancement system, characterized in that: include: The electrode loss ratio calculation module is used to obtain the loss of all electrodes during the operation cycle and determine the loss ratio of each electrode; The electrode loss calculation module is used to determine the loss of all electrodes by measuring the tin content in the glass product within a set time; The electrode predicted propulsion calculation module is used to determine the predicted propulsion of each electrode within a set time according to the loss of all electrodes and the loss ratio of each electrode; The electrode advancement judgment module is used to judge whether each electrode reaches the over-advancement condition. If so, the rear zone advancement module is executed; If not, the front area advancement module is executed; A rear zone propulsion module, used to set an actual propulsion amount of a corresponding electrode, and determine an initial length of the corresponding electrode according to the actual propulsion amount, wherein the actual propulsion amount is greater than a predicted propulsion amount of the corresponding electrode; The front zone advancement module is used to set the actual advancement amount of the corresponding electrode, and determine the initial length of the corresponding electrode according to the actual advancement amount, and the actual advancement amount is less than the predicted advancement amount of the corresponding electrode.

8. The LTPS substrate glass furnace tin electrode advancement system according to claim 7, characterized in that: The electrode loss ratio calculation module includes: Electrode loss collection unit, used to obtain the loss of each electrode during the operation cycle ; The electrode loss ratio calculation unit is used to calculate the electrode loss ratio according to the The loss ratio of each electrode and The loss of each electrode during the operation cycle, and the loss ratio of each electrode are calculated , is the number of electrodes.

9. The LTPS substrate glass furnace tin electrode advancement system according to claim 8, characterized in that: The electrode loss calculation module includes: The tin oxide content collection unit in glass products is used to measure the tin oxide content in glass products within a set time by electron coupled plasma spectroscopy. ; The tin oxide content collection unit for glass product raw materials is used to collect the tin oxide content in the corresponding glass product raw materials. ; The total electrode loss calculation unit is used to calculate the total electrode loss according to the Calculate the consumption of all electrodes within a set time , is the volatilization rate of tin oxide in the raw materials of glass products, is the volatilization rate of all electrodes, and The value range is 4%~6%.

10. The LTPS substrate glass furnace tin electrode advancement system according to claim 9, characterized in that: The over-propelling condition is: whether the electrode operating temperature reaches the critical temperature value of the pool wall, and whether the electrode loss ratio reaches the electrode loss critical value; The rear area propulsion module comprises: The actual propulsion calculation unit in the rear area is used to calculate the actual propulsion amount according to and Calculate the actual advancement of the electrode to achieve the over-advancement condition; in, To achieve the overdrive condition, the propulsion coefficient of the electrode is The value range is 1.01~1.

05. The predicted amount of electrode advancement to achieve the over-advancement condition; The initial length calculation unit of the rear electrode is used to calculate the initial length of the rear electrode according to Calculate the initial length of the electrode to achieve the overdrive condition , is the replacement cycle of the electrode; The front zone propulsion module comprises: The actual propulsion calculation unit of the front area is used to calculate the actual propulsion of the front area according to the and Calculate the actual advancement of the electrode that does not reach the over-advancement condition; in, is the propulsion coefficient of the electrode that does not reach the over-propulsion condition, The value range is 0.91~1. The predicted advancement amount of the electrode that does not reach the over-advancement condition; The initial length calculation unit of the front area electrode is used to calculate the initial length of the front area electrode according to the Calculate the initial length of the electrode before the overadvance condition is reached , is the replacement period of the electrode.

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