Method for controlling erosion speed of melting furnace pool wall brick

Abstract

The invention belongs to the technical field of glass production, and particularly relates to a method for controlling the corrosion speed of a melting furnace pool wall brick. The method comprises the following steps: formulating a reasonable pool wall brick erosion rate according to the designed service life of the pool wall brick of the melting furnace, and determining a designed inner wall temperature value of the pool wall brick of the melting furnace at a certain operation time point; determining an actual inner wall temperature value of the melting furnace pool wall brick at a certain operation time point; and comparing the designed inner wall temperature of the melting furnace tank wall brick with the actual inner wall temperature of the melting furnace tank wall brick under the same operation time, and adjusting the cooling air volume and the cooling mode. By comparing the actual inner wall temperature of the melting furnace tank wall brick with the designed inner wall temperature, the cooling air volume of the tank wall brick is accurately adjusted, the tank wall cooling air volume is optimized, a proper tank wall cooling mode is selected, and the cooling effect of the tank wall brick is changed, so that the actual inner wall temperature of the melting furnace tank wall brick is consistent with the designed inner wall temperature; the corrosion speed of the melting furnace tank wall is accurately controlled, and electric energy and fuel heat energy are saved.

Description

Technical Field

[0001] The invention belongs to the technical field of glass production, and in particular relates to a method for controlling the erosion speed of melting furnace pool wall bricks. Background Art

[0002] The melting furnace is the heart of the glass production line. The service life of the melting furnace mainly depends on the erosion and burning degree of the melting furnace pool wall, large crown, heat storage chamber, etc., and the erosion and damage degree of the pool wall is the most critical part affecting the life of the melting furnace. In the operation and maintenance of the melting furnace pool wall, the method to control the erosion rate of the pool wall is to cool the pool wall bricks. The main cooling methods are air cooling, water cooling (inner water bag, middle water bag, outer water bag, water spray), gas cooling (saturated water vapor, water mist, evaporation), etc. At different stages of the operation of the melting furnace pool wall, how to choose the cooling method of the melting furnace pool wall bricks and the cooling effect of the pool wall bricks, there is currently no better control method, and we can only rely on the experience of the kiln maintenance technicians. Usually, cooling air is used to cool the pool wall. In the early stage of the operation of the melting furnace pool wall, a smaller cooling air volume is opened. In the middle and late stages of the operation of the melting furnace pool wall, the thickness of the pool wall bricks is thinner, and a larger cooling air volume is opened on the outside of the pool wall bricks. When the pool wall bricks are thinner or cracks appear, cooling water bags are attached to the melting furnace pool wall bricks, or the melting furnace pool wall is hot-repaired and reinforced with bricks. The above methods can slow down the erosion rate of the pool wall bricks and extend the life of the pool wall. However, the above method is completely based on the experience and judgment of the kiln maintenance technicians because of the lack of the erosion condition of the pool wall bricks. Different kiln maintenance technicians choose different cooling methods and control the cooling air volume, which has different cooling effects on the pool wall bricks. In this way, the erosion rate of the pool wall bricks cannot be accurately controlled. For example, if the pool wall cooling air volume is too large, although it can slow down the erosion rate of the pool wall bricks and ensure the safe operation of the melting furnace pool wall, there is a large waste of energy; for example, if the hot repair and brick binding time is advanced, there will be serious waste of resources. If the hot repair and brick binding time is delayed, there will be a greater safety risk in the operation of the melting furnace. Therefore, the existing control method cannot better slow down the erosion rate of the pool wall bricks, which seriously affects the life of the melting furnace pool wall. How to improve the erosion status monitoring of the melting furnace pool wall bricks and accurately adjust the cooling of the pool wall bricks is a major problem that needs to be solved. Summary of the invention

[0003] To overcome the above-mentioned defects, the object of the present invention is to provide a method for controlling the erosion rate of the wall bricks of a melting furnace pool.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] A method for controlling the erosion rate of furnace pool wall bricks comprises the following steps:

[0006] S1. Determine the design inner wall temperature value of the furnace pool wall brick at a certain operating time point;

[0007] S2, determining the actual inner wall temperature value of the furnace pool wall brick at a certain operating time point;

[0008] S3. Compare the designed inner wall temperature of the furnace pool wall bricks with the actual inner wall temperature of the furnace pool wall bricks under the same running time, and adjust the cooling air volume and cooling method.

[0009] Preferably, the step S1 of determining the designed inner wall temperature value of the furnace pool wall brick at a certain operation time point includes:

[0010] S11. Determine the design erosion rate curve of the furnace pool wall bricks under ideal working conditions:

[0011] F 设 =(LF 20 )*t 控 / t 设

[0012] Where, L is the thickness of the pool wall brick when the erosion rate begins to be precisely controlled; F 20 The thickness of the pool wall bricks when brick binding is required; t 设 is the designed operating life of the furnace pool wall bricks before tying; t 控 F is the time of operation of the pool wall tiles after the erosion rate of the pool wall tiles is precisely controlled; 设 t 控 The amount of erosion of the pool wall tiles corresponding to the time;

[0013] S12. Determine the relationship between the erosion amount and time of the furnace pool wall bricks under actual working conditions:

[0014]

[0015] In the formula, F 实 is the erosion amount of pool wall tiles under actual working conditions; T 内 is the actual inner wall temperature of the furnace wall bricks; n is the scouring speed of the glass liquid on the wall bricks; t 控 It is the time for the pool wall tiles to run after precise control is implemented; a1, a2, a3, b1, b2, c2 are all coefficients, which are selected according to the model of the pool wall tiles and the type of glass liquid;

[0016] S13. Assuming that the erosion amount of the furnace pool wall bricks under ideal working conditions is equal to that under actual working conditions, the design inner wall temperature value of the furnace pool wall bricks at a certain operating time point is obtained:

[0017] According to F 设 =F 实 , find T 内

[0018] At this time T 设 =T 内

[0019] Where: T 设 It is the designed inner wall temperature value of the furnace pool wall brick at a certain operating time point;

[0020] Preferably, the step S2 of determining the actual inner wall temperature value of the furnace pool wall brick at a certain operation time point includes:

[0021] S21, heat flow Q detected by heat flow meter 热 ;

[0022] S22. Calculate the radiation heat Q of the outer wall of the melting furnace pool facing the air 辐 Heat conduction Q from the inner wall of the furnace pool to the outer wall 传 :

[0023] Q 辐 =ε*A*C0*[(T 外 / 100) 4 -(T 环 / 100) 4 ]

[0024] Where ε is the blackness value of the pool wall brick, A is the equivalent area, C0 is the blackbody radiation coefficient, T 外 is the outer wall temperature of the furnace pool, T 环 is the ambient temperature;

[0025] Q 传 =q 传 *A=λ*(T 内 -T 外 )*A / δ

[0026] In the formula, q 传 It represents the heat flux density value of the pool wall brick, A is the equivalent area, λ is the thermal conductivity of the pool wall brick, T 内 is the actual inner wall temperature of the furnace pool bricks, T 外 is the outer wall temperature of the furnace pool, and δ is the remaining thickness of the pool wall;

[0027] S23. According to Q 热 =Q 辐 +Q 传 , solve to obtain the actual inner wall temperature T of the furnace pool wall brick at a certain operating time point 内 .

[0028] Preferably, step S3 compares the designed inner wall temperature of the melting furnace pool wall bricks with the actual inner wall temperature of the melting furnace pool wall bricks at the same time point, and adjusts the cooling air volume and the cooling method, including: first determining the melting process, and then adjusting the cooling air volume and the cooling method in turn.

[0029] Preferably, the step S3 of comparing the designed inner wall temperature of the furnace pool wall bricks with the actual inner wall temperature of the furnace pool wall bricks at the same time point, and adjusting the cooling air volume and cooling method includes:

[0030] S31. When the actual inner wall temperature of the melting furnace pool wall is less than / greater than the designed inner wall temperature of the melting furnace pool wall, the melting furnace glass melting process must first be verified to determine whether the melting process is appropriate. If the melting process is not appropriate after verification, the melting process is adjusted;

[0031] S32. After the melting process of the melting furnace is adjusted appropriately, the actual inner wall temperature of the melting furnace pool wall is calculated again, and the numerical value is compared with the designed inner wall temperature of the melting furnace pool wall:

[0032] When the actual inner wall temperature of the melting furnace pool is equal to the designed inner wall temperature of the pool wall, no adjustment is made;

[0033] When the actual inner wall temperature of the melting furnace pool wall is lower than the designed inner wall temperature of the pool wall, it indicates that the erosion rate of the melting furnace pool wall bricks is slow. Reduce the cooling air volume on the outer side of the pool wall 1-3 times until the actual inner wall temperature of the pool wall is equal to the designed inner wall temperature of the pool wall.

[0034] When the actual inner wall temperature of the melting furnace pool wall is more than 50℃ higher than the designed inner wall temperature of the pool wall, it indicates that the corrosion rate of the melting furnace pool wall bricks is very fast. The water cooling method on the outer side of the melting furnace pool wall should be directly used for treatment until the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the melting furnace pool wall.

[0035] When the actual inner wall temperature of the melting furnace pool wall is 50℃ higher than the designed inner wall temperature of the pool wall, it indicates that the erosion rate of the melting furnace pool wall bricks is fast, and the cooling air volume outside the pool wall should be increased;

[0036] S33. When the cooling air volume on the outside of the pool wall is increased, the actual inner wall temperature of the melting furnace pool wall is calculated again, and the numerical value is compared with the designed inner wall temperature of the melting furnace pool wall. When the actual inner wall temperature of the pool wall is still greater than the designed inner wall temperature of the pool wall, the cooling air volume on the outside of the pool wall is increased 1-2 times again, and the actual inner wall temperature of the melting furnace pool wall is calculated, and the numerical value is compared with the designed inner wall temperature of the melting furnace pool wall. When the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the melting furnace pool wall, no further adjustment is made; when the actual inner wall temperature of the pool wall is still greater than the designed inner wall temperature of the pool wall, a water cooling method is added on the outside of the melting furnace pool wall until the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the melting furnace pool wall.

[0037] Preferably, the water cooling method is a water bag cooling method, or a water bag cooling method followed by a spray cooling method, until the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the melting furnace pool wall.

[0038] Preferably, the method further comprises:

[0039] In the later stage of the operation of the melting furnace pool wall, when the designed inner wall temperature of the melting furnace pool wall is 50°C higher than the actual inner wall temperature of the melting furnace pool wall or the actual inner wall temperature of the pool wall is lower than 1380°C, the melting furnace pool wall is treated by hot repair and brick binding, and then the designed inner wall temperature of the melting furnace pool wall bricks at a certain operation time point and the actual inner wall temperature of the melting furnace pool wall are recalculated according to the method described in steps S1 and S2, and the actual inner wall temperature of the melting furnace pool wall and the designed inner wall temperature of the melting furnace pool wall are compared. The cooling air volume and the cooling method are adjusted according to the adjustment method described in step S3 until the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the pool wall.

[0040] Preferably, the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the pool wall, which means that the difference between the two is within 8°C.

[0041] The positive beneficial effects of the present invention are:

[0042] 1. During the operation of the melting furnace, the present invention compares the actual inner wall temperature of the melting furnace pool wall bricks with the designed inner wall temperature. On the premise of ensuring that the glass melting process is appropriate, the cooling air volume of the pool wall bricks is accurately adjusted to optimize the pool wall cooling air volume, select a suitable pool wall cooling method, change the cooling effect of the pool wall bricks, make the actual inner wall temperature of the melting furnace pool wall consistent with the designed inner wall temperature, accurately control the erosion rate of the melting furnace pool wall, save electricity and fuel heat energy, and play a role in energy saving and consumption reduction.

[0043] 2. The present invention establishes a relationship between the inner temperature of the melting furnace pool wall and the operating time of the melting furnace pool wall, accurately adjusts the cooling air volume and pool wall cooling method of the pool wall bricks, controls the inner temperature of the melting furnace pool wall, slows down the erosion rate of the pool wall bricks, and can also accurately determine the hot repair and brick binding time of the melting furnace pool wall bricks, thereby extending the life of the melting furnace pool wall.

[0044] 3. The present invention uses the temperature value of the liquid surface line on the inner side of the melting furnace pool wall (i.e., the actual inner wall temperature of the melting furnace pool wall bricks) as the control point and judgment standard. By accurately controlling the temperature of the liquid surface line on the inner side of the pool wall, the erosion rate of the pool wall can be accurately controlled and slowed down, thereby extending the life of the melting furnace pool wall.

[0045] 4. By using the method of the present invention to control the erosion rate of the melting furnace pool wall, the operating conditions of the melting furnace pool wall and the burning and erosion conditions of the pool wall bricks are controlled, so that there is no need to rely on the work experience of the kiln maintenance technicians to operate, the labor intensity of the kiln maintenance operators is reduced, and the kiln maintenance personnel's misoperation of the melting furnace process adjustment is discovered in time, ensuring the safe and efficient operation of the melting furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a schematic diagram of the furnace pool wall structure;

[0047] In the figure: 1- glass liquid, 2- liquid level line on the inner side of the melting furnace pool wall, 3- outer side of the melting furnace pool wall, 4- pool wall cooling air duct, 5- pool wall cooling air, 6- insulation bricks, 7- pool wall bricks. DETAILED DESCRIPTION

[0048] The present invention is further described below in conjunction with some specific implementation methods.

[0049] Schematic diagram of the furnace wall structure Figure 1 As shown, the glass liquid 1 is on the inner side of the furnace pool wall brick 7 and is in direct contact with the inner side of the furnace pool wall brick 7. The glass liquid 1 flows on the inner side of the furnace pool wall brick 7, causing erosion and thinning of the pool wall brick 7. The position where the liquid surface of the glass liquid 1 contacts the pool wall brick 7 is the liquid surface line position 2 on the inner side of the furnace pool wall. The actual inner wall temperature and the designed inner wall temperature of the furnace pool wall referred to in the present invention are both the temperature of the pool wall liquid surface line position. The outer side of the furnace pool wall brick 7 is the outer side 3 of the furnace pool wall. The pool wall cooling wind 5 cools the outer side 3 of the furnace pool wall through the pool wall cooling wind duct 4. On the outer side of the furnace pool wall brick 7 is the pool wall insulation brick 6, which is used to insulate the furnace pool wall.

[0050] A method for controlling the erosion rate of furnace pool wall bricks comprises the following steps:

[0051] S1. Determine the design inner wall temperature value of the furnace pool wall brick at a certain operating time point;

[0052] S2, determining the actual inner wall temperature value of the furnace pool wall brick at a certain operating time point;

[0053] S3. Compare the designed inner wall temperature of the furnace pool wall bricks with the actual inner wall temperature of the furnace pool wall bricks under the same running time, and adjust the cooling air volume and cooling method.

[0054] Furthermore, the step S1 of determining the design inner wall temperature value of the furnace pool wall brick at a certain operation time point includes:

[0055] S11. Determine the design erosion rate curve of the furnace pool wall bricks under ideal working conditions:

[0056] F 设 =(LF 20 )*t 控 / t 设

[0057] Where, L is the thickness of the pool wall brick when the erosion rate begins to be precisely controlled; F 20 The thickness of the pool wall bricks when brick binding is required; t 设 is the designed operating life of the furnace pool wall bricks before tying; t 控 F is the time of operation of the pool wall tiles after the erosion rate of the pool wall tiles is precisely controlled; 设t 控 The amount of erosion of the pool wall tiles corresponding to the time;

[0058] S12. Determine the relationship between the erosion amount and time of the furnace pool wall bricks under actual working conditions:

[0059]

[0060] In the formula, F 实 is the erosion amount of pool wall tiles under actual working conditions; T 内 is the actual inner wall temperature of the furnace wall bricks; n is the scouring speed of the glass liquid on the wall bricks; t 控 It is the time for the pool wall tiles to run after precise control is implemented; a1, a2, a3, b1, b2, c2 are all coefficients, which are selected according to the model of the pool wall tiles and the type of glass liquid;

[0061] S13. Assuming that the erosion amount of the furnace pool wall bricks under ideal working conditions is equal to that under actual working conditions, the design inner wall temperature value of the furnace pool wall bricks at a certain operating time point is obtained:

[0062] According to F 设 =F 实 , find T 内

[0063] At this time T 设 =T 内

[0064] Where: T 设 It is the designed inner wall temperature value of the furnace pool wall brick at a certain operating time point;

[0065] Furthermore, the step S2 of determining the actual inner wall temperature value of the furnace pool wall brick at a certain operation time point includes:

[0066] S21, heat flow Q detected by heat flow meter 热 ;

[0067] S22. Calculate the radiation heat Q of the outer wall of the melting furnace pool facing the air 辐 Heat conduction Q from the inner wall of the furnace pool to the outer wall 传 :

[0068] Q 辐 =ε*A*C0*[(T 外 / 100) 4 -(T 环 / 100) 4 ]

[0069] Where ε is the blackness value of the pool wall brick, A is the equivalent area, C0 is the blackbody radiation coefficient, T 外 is the outer wall temperature of the furnace pool, T环 is the ambient temperature;

[0070] Q 传 =q 传 *A=λ*(T 内 -T 外 )*A / δ

[0071] In the formula, q 传 It represents the heat flux density value of the pool wall brick, A is the equivalent area, λ is the thermal conductivity of the pool wall brick, T 内 is the actual inner wall temperature of the furnace pool bricks, T 外 is the outer wall temperature of the furnace pool, and δ is the remaining thickness of the pool wall;

[0072] S23. According to Q 热 =Q 辐 +Q 传 , solve to obtain the actual inner wall temperature T of the furnace pool wall brick at a certain operating time point 内 .

[0073] Furthermore, step S3 describes comparing the designed inner wall temperature of the furnace pool wall bricks with the actual inner wall temperature of the furnace pool wall bricks at the same time point, adjusting the cooling air volume and the cooling method, and according to the difference between the two, adopting an accurate pool wall cooling air adjustment method or accurately selecting the cooling method of the furnace pool wall bricks, so that the difference between the actual inner wall temperature of the furnace pool wall and the designed inner wall temperature is within 8°C, that is, the actual inner wall temperature of the furnace pool wall is equal to the designed inner wall temperature of the pool wall, so that the actual inner wall temperature of the furnace pool wall is consistent with the designed inner wall temperature.

[0074] Furthermore, the comparison of the designed inner wall temperature of the melting furnace pool wall bricks and the actual inner wall temperature of the melting furnace pool wall bricks at the same time point, and adjusting the cooling air volume and the cooling method includes: first determining the melting process, and then adjusting the cooling air volume and the cooling method in turn.

[0075] Further, the comparison of the designed inner wall temperature of the melting furnace pool wall bricks and the actual inner wall temperature of the melting furnace pool wall bricks, and adjusting the cooling air volume and cooling method include:

[0076] S31. When the actual inner wall temperature of the melting furnace pool wall is less than / greater than the designed inner wall temperature of the melting furnace pool wall, the melting furnace glass melting process must first be verified to determine whether the melting process is appropriate. If the melting process is not appropriate after verification, the melting process is adjusted;

[0077] S32. After the melting process of the melting furnace is adjusted appropriately, the actual inner wall temperature of the melting furnace pool wall is calculated again, and the numerical value is compared with the designed inner wall temperature of the melting furnace pool wall:

[0078] When the actual inner wall temperature of the melting furnace pool is equal to the designed inner wall temperature of the pool wall, no adjustment is made;

[0079] When the actual inner wall temperature of the melting furnace pool wall is lower than the designed inner wall temperature of the pool wall, it indicates that the erosion rate of the melting furnace pool wall bricks is slow. Reduce the cooling air volume on the outer side of the pool wall 1-3 times until the actual inner wall temperature of the pool wall is equal to the designed inner wall temperature of the pool wall.

[0080] When the actual inner wall temperature of the melting furnace pool wall is more than 50℃ higher than the designed inner wall temperature of the pool wall, it indicates that the corrosion rate of the melting furnace pool wall bricks is very fast. The water cooling method on the outer side of the melting furnace pool wall should be directly used for treatment until the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the melting furnace pool wall.

[0081] When the actual inner wall temperature of the melting furnace pool wall is 50℃ higher than the designed inner wall temperature of the pool wall, it indicates that the erosion rate of the melting furnace pool wall bricks is fast, and the cooling air volume outside the pool wall should be increased;

[0082] S33. When the cooling air volume on the outside of the pool wall is increased, the actual inner wall temperature of the melting furnace pool wall is calculated again, and the numerical value is compared with the designed inner wall temperature of the melting furnace pool wall. When the actual inner wall temperature of the pool wall is still greater than the designed inner wall temperature of the pool wall, the cooling air volume on the outside of the pool wall is increased 1-2 times again, and the actual inner wall temperature of the melting furnace pool wall is calculated, and the numerical value is compared with the designed inner wall temperature of the melting furnace pool wall. When the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the melting furnace pool wall, no further adjustment is made; when the actual inner wall temperature of the pool wall is still greater than the designed inner wall temperature of the pool wall, a water cooling method is added on the outside of the melting furnace pool wall until the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the melting furnace pool wall.

[0083] Further, the water cooling method is a water bag cooling method, or a water bag cooling method first and then a spray cooling method, until the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the melting furnace pool wall. When the water bag cooling method can achieve the actual inner wall temperature of the melting furnace pool wall equal to the designed inner wall temperature of the melting furnace pool wall, there is no need for a spray cooling method, but when the actual inner wall temperature of the pool wall is still greater than the designed inner wall temperature of the pool wall after the water bag cooling, the spray cooling method is replaced until the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the melting furnace pool wall.

[0084] Furthermore, the method further comprises:

[0085] In the later stage of the operation of the melting furnace pool wall, when the designed inner wall temperature of the melting furnace pool wall is greater than the actual inner wall temperature of the melting furnace pool wall by 50°C or the actual inner wall temperature of the pool wall is lower than 1380°C, the melting furnace pool wall is thermally repaired by tying bricks. The position of the tying bricks is generally above the insulation bricks 6, and the material of the tying bricks is consistent with the pool wall bricks. Then, the designed inner wall temperature of the melting furnace pool wall bricks at a certain operating time point and the actual inner wall temperature of the melting furnace pool wall are recalculated according to the method described in steps S1 and S2, and the actual inner wall temperature of the melting furnace pool wall and the designed inner wall temperature of the melting furnace pool wall are compared. The cooling air volume and the cooling method are adjusted according to the adjustment method described in step S3 until the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the pool wall.

[0086] Example 1

[0087] This embodiment detects a 600-ton float glass production line in China. The melting furnace is 40m long (melting section + clarification section), 12m wide and 1.2m high. The specific part detected is the liquid level line position of the No. 6 pool wall on the main control side of the melting furnace. The refractory material of the melting furnace pool wall bricks used in this part is 33# pool wall zirconium corundum bricks. The production line melts soda-lime-silica glass.

[0088] The method of the present invention is used to control the erosion rate of the furnace pool wall, comprising the following steps:

[0089] S1. Determine the design inner wall temperature value of the furnace pool wall brick at a certain operating time point;

[0090] S11. Determine the design erosion rate curve of the pool wall brick refractory material under ideal working conditions:

[0091] When the thickness of the pool wall bricks is 150-250mm, because when the thickness of the pool wall bricks is greater than 150mm, the cooling wind outside the pool wall has little effect on the temperature inside the pool wall, so an insulation device is added to the outside of the pool wall bricks, that is, insulation cotton or insulation fiber is added to reduce the heat dissipation of the pool wall and save fuel and other energy; when the thickness of the pool wall bricks is ≤150mm, the erosion rate of the pool wall bricks is precisely controlled, that is, the erosion rate of the pool wall bricks is controlled to extend the life of the melting furnace pool wall.

[0092] After the erosion rate of the pool wall tiles is precisely controlled, the annual erosion amount is (LF 20 ) / t 设 ;

[0093] The relationship curve between the designed erosion amount and time of the furnace pool wall bricks is obtained:

[0094] F 设 =(LF 20 )*t 控 / (365*t 设 )=(150-20)*t 控 / (365*6)=0.0594*t 控 (1)

[0095] Where, L is the thickness of the pool wall brick when the erosion rate begins to be precisely controlled, and the value is 150mm; F 20 The thickness of the pool wall bricks when the bricks need to be tied is 20mm; t 设 is the designed operating life of the furnace wall bricks before the bricks are tied, and the value is 4-8 years. The designed operating life of the furnace wall selected in this embodiment before the bricks are tied is 6 years; t 控 F is the time that the erosion rate of the pool wall tiles runs after precise control is implemented, in days; 设 t 控 The erosion amount of the pool wall tiles corresponding to the time, unit: mm;

[0096] S12. Determine the relationship between the erosion amount and time of the furnace pool wall bricks under actual working conditions:

[0097] Through dynamic erosion experiments in the laboratory, it was found that the erosion rate of 33# pool wall zirconium corundum bricks in sodium-lime-silicon glass liquid, that is, the actual erosion amount of the pool wall bricks, is related to the glass liquid temperature, the scouring speed of the glass liquid on the pool wall bricks and the erosion time as follows: The actual erosion amount of the pool wall bricks F is formed by combining the three formulas of paragraphs

[0051] ,

[0062] and

[0073] of the patent number "2023110539135" and the name "A method for detecting the erosion thickness of refractory materials for kiln pool walls". 实 formula:

[0098] Erosion amount Y1 = a1*[e (b1*Tgl) ]

[0099] In the formula: Y1 is the erosion amount of zirconium corundum rod at different temperatures, unit: mm; Tgl is the temperature value of zirconium corundum rod, unit: °C; a1 and b1 are coefficient values. Different types of zirconium corundum bricks and different glass liquids have different coefficients.

[0100] Erosion amount Y2 = a2*t

[0101] In the formula: Y2 is the erosion amount of zirconium corundum rod under different erosion time, unit: mm; t is the erosion time value of zirconium corundum rod, unit: hours; a2 is the coefficient value, different types of zirconium corundum bricks and different glass liquids have different coefficients;

[0102] Erosion amount Y3 = a3*n 2 +b3*n+c3

[0103] Where: Y3 is the erosion amount of the zirconium corundum rod under different scouring speeds, unit: mm; n is the scouring speed of the zirconium corundum rod, unit: rpm; a3, b3, c3 are coefficient values, and different types of zirconium corundum bricks and different glass liquids have different coefficients;

[0104] The zirconium corundum rod is made from zirconium corundum bricks;

[0105] This embodiment uses 33# zirconium corundum bricks and soda-lime-silicon glass liquid. Referring to the patent number "2023110539135", entitled "A method for detecting the erosion thickness of refractory materials for kiln pool walls", paragraphs

[0084] to

[0103] , it is respectively obtained that: a1 = 1*10 -10 , b1=0.015,a2=0.0133,a3=0.0006,b3=-0.0015,c3=0.591, further conclusion:

[0106] Erosion amount Y1 = (1E-10)*e (0.015*Tgl)

[0107] Where: Y1 is the erosion amount of 33# zirconium corundum rod at different temperatures, unit: mm; Tgl is the temperature value of 33# zirconium corundum rod, unit: °C;

[0108] Erosion amount Y2 = 0.0133*t

[0109] Where: Y2 is the erosion amount of 33# zirconium corundum rod under different erosion time, unit: mm; t is the erosion time value of 33# zirconium corundum rod, unit: h;

[0110] Erosion amount Y3 = 0.0006*n 2 -0.0015*n+0.591

[0111] Where: Y3 is the erosion amount of 33# zirconium corundum rod at different scouring speeds, unit: mm; n is the scouring speed of 33# zirconium corundum rod, unit: rpm;

[0112] Referring to paragraphs

[0112] -

[0118] of patent number "2023110539135" and titled "A method for detecting the erosion thickness of refractory materials on the wall of a kiln pool", the effects of temperature and scouring speed on the erosion of zirconium corundum rods are respectively established:

[0113] Based on Y2=0.0133*t, the effect of temperature on zirconium corundum rod is corrected;

[0114] By Y 修1 =0.0133*24*t*1*10 -10 *Y1=0.3192*10 -10 *t*e (0.015×Tgl)

[0115] Where: Y 修1 It is the erosion amount of zirconium corundum brick under specific scouring speed, different temperature and different erosion time;

[0116] In Y 修1 On this basis, the influence of scouring speed on the erosion of zirconium corundum bricks is modified:

[0117] From

[0113] -

[0116] we can get:

[0118] Y 修2 =Y 修1 *(0.0006*n 2 -0.0015×n+0.591) / 0.665=0.3192*10 -10 *t*e (0.015×

[0119] Tgl) *(0.0006*n 2 -0.0015×n+0.591) / 0.665=0.48*e 0.015*T 内 *(0.0006*n 2 -0.0015*n+0.591)*t / 10 10

[0120] Where: Y 修2 It is the erosion amount of zirconium corundum bricks under different scouring speeds, different temperatures and different erosion times;

[0121] Therefore: F 实 =Y 修2 =0.48*e 0.015*T 内 *(0.0006*n 2 -0.0015*n+0.591)*t 控 / 10 10 (2)

[0122] In the formula, F 实 is the actual erosion amount of the pool wall brick, that is, the erosion amount of 33# zirconium corundum brick in the sodium-lime-silicon glass liquid, unit: mm; T 内 is the actual inner wall temperature of the furnace pool wall bricks, in degrees Celsius; n is the scouring speed of the glass liquid on the pool wall bricks, in revolutions per minute, t 控 The time for the pool wall brick erosion rate to run after precise control is implemented, in days;

[0123] S13, assuming that the erosion amount of the furnace pool wall bricks under ideal working conditions is equal to that under actual working conditions, solve and obtain the design inner wall temperature value of the furnace pool wall bricks at a certain operating time point;

[0124] The test site is on the 50th day of operation (the time starts from the time when the erosion rate of the pool wall tiles is precisely controlled), that is, t 控 = 50 days, substituting into formula (1), the designed erosion thickness of the zirconium corundum bricks for the pool wall is:

[0125] F 设 =0.0594*t 控 =0.0594*50=2.97mm

[0126] In the formula, F 设 is the designed erosion amount of the pool wall tiles, in units of mm; t 控 It is the operation time of the pool wall tile erosion rate after precise control is implemented, in days.

[0127] After precise control of the pool wall tiles, the designed erosion amount after 50 days of operation is equal to the actual erosion amount. 实 =F 设 , F 设 =2.97mm Substituting into formula (2), we get:

[0128] 2.97 = 0.48 * e 0.015*T 内 *(0.0006*n 2 -0.0015*n+0.591)*t 控 / 10 10 (3)

[0129] Where, T 内 is the temperature at the liquid level on the inner side of the furnace pool wall, i.e. the designed inner wall temperature of the furnace pool wall bricks, in °C; n is the flushing speed of the glass liquid on the pool wall bricks, in rpm; t 控 The operation time of the pool wall tile erosion rate after precise control is implemented, and the value is 50 days;

[0130] According to F 设 =F 实 , find T 内

[0131] At this time T 设 =T 内

[0132] Where: T 设 It is the set inner wall temperature value of the furnace pool wall brick at a certain operating time point;

[0133] Then, the designed inner wall temperature T of the furnace pool wall bricks after the erosion time of 50 days is obtained after the erosion rate of the pool wall bricks is precisely controlled. 设 ;

[0134] Among them, the calculation of the scouring speed n of the glass liquid on the liquid surface line of the pool wall can be found in "Glass" magazine, Issue 6, 2017, Wei Lifang, "The influence of glass liquid flow in the melting furnace on glass quality", pages 18-19, and the result is:

[0135] S=F*G / (24*r*h*b)

[0136] Where: S is the flow rate of the glass liquid (m / h); F is the flow coefficient (taken as 9.29); G is the pulling amount (600 tons); r is the average density of the glass liquid (2.16 g / cm 3 ); h-thickness of glass surface flow (429 mm); b-kiln width (12 m);

[0137] That is: S = 9.29*600 / (24*2.16*0.429*12) = 20.89 m / h,

[0138] The diameter D of the pool wall brick sample used in the laboratory dynamic experiment is 30 mm, so,

[0139] n = S * 1000 / (π * D * 60) = 20.89 * 1000 / (3.14 * 30 * 60) = 3.696 rpm;

[0140] Where: n is the rotation speed of the pool wall zirconium corundum rod sample used in the laboratory dynamic experiment (r / min), S is the flow rate of the glass liquid (m / h), and D is the diameter of the pool wall zirconium corundum rod sample used in the dynamic experiment (mm);

[0141] The flushing speed of the glass liquid on the pool wall tiles is n = 3.696 rpm, t 控 = 50 days, substituting into formula (3), the design inner wall temperature T of the No. 6 furnace wall brick on the main operation side of the furnace is obtained. 设 =T 内 =1431℃.

[0142] S2, determining the actual inner wall temperature value of the furnace pool wall bricks at a certain operating time;

[0143] When the furnace pool wall erosion rate was precisely controlled and the furnace was in operation for 50 days, the liquid level position of the No. 6 pool wall on the main operation side of the furnace was tested using the present invention. The outer pool wall temperature of the tested part was collected using an infrared thermal imager and was 214°C. The ambient temperature was measured using a mercury thermometer and was 41.8°C. The cooling wind speed of the pool wall at the tested part was collected using an anemometer and was 29.6m / s. The equivalent size of the pool wall brick at the tested part was measured using a ruler and was 0.4*0.1m 2The average temperature of the pool wall bricks is (1431+214) / 2=822.5℃. When the zirconium corundum bricks of the pool wall to be tested are at 822.5℃, the thermal conductivity λ=3.766W / mk. The heat flux density value of the part to be tested collected by the heat flow meter is 32485W / m 2 .

[0144] So the heat flow value is Q 热 =32485*0.4*0.1=1299.4W;

[0145] According to the "Glass Industry Thermal Process and Equipment Table", the blackness of refractory corundum bricks at 1000°C is ε = 0.46, and the blackbody radiation coefficient C0 = 5.669W / (m 2 *k 4 );

[0146] According to the energy balance principle, the outer wall of the furnace pool to be tested is taken as the research object. The radiation heat Q of the outer wall of the furnace pool facing the air 辐 Heat conduction from the inner wall of the pool to the outer wall Q 传 The sum is equal to the heat flow value detected by the heat flow meter.

[0147] That is: heat flow heat Q 热 =Conduction heat Q 传 + Radiant Heat Q 辐

[0148] Radiant heat Q 辐 =ε*A*C0*[(T 外 / 100) 4 -(T 环 / 100) 4 ]

[0149] Where: ε is the blackness value of the pool wall tile, which is 0.46; C0 is the blackbody radiation coefficient, C0 = 5.669W / (m 2 *k 4 );A is the equivalent area: 0.4*0.1=0.04m 2 ; T 外 is the temperature of the outer wall of the melting furnace pool, which is 214℃ as measured by infrared instrument; T 环 It is the ambient temperature, that is, the ambient temperature outside the melting furnace pool wall, and the thermometer measured 41.8℃.

[0150] Radiant heat Q 辐 =ε*A*C0*[(T 外 / 100) 4 -(T 环 / 100) 4 ]=0.46*0.4*0.1*5.669

[0151] *{[(214+273) / 100] 4 -(41.8+273) / 100] 4}=48.43W.

[0152] Conduction heat Q 传 = Heat flow heat Q 热 -Radiant heat Q 辐 =1299.4-48.43=1250.97W

[0153] Conduction heat Q 传 =q 传 *A=λ*(T 内 -T 外 )*A / δ

[0154] Where λ is the thermal conductivity of the pool wall brick, which is 3.766W / mk; T 外 is the temperature of the outer wall of the melting furnace pool, and the test result is 214℃; T 内 is the temperature of the inner wall of the furnace pool; A is the equivalent area, which is 0.4*0.1=0.04m 2 , δ is the remaining thickness of the pool wall;

[0155] Among them, the remaining thickness δ of the pool wall brick is: LF 设 =150-2.97=147.03mm

[0156] In the formula, F 设 is the designed erosion amount of the pool wall tiles in 50 days, and L is the thickness of the pool wall tiles when the erosion rate begins to be precisely controlled.

[0157] Conduction heat Q 传 =q 传 *A=λ*(T 内 -T 外 )*A / δ=3.766*(T 内 -214)*0.04 / (147.03*10 -3 )=1250.97W

[0158] The solution is: T 内 =1435℃, that is, the erosion rate of the furnace pool wall is precisely controlled. After 50 days of operation, the actual inner wall temperature of the pool wall is 1435℃.

[0159] S3. Determine the erosion rate of the pool wall: the actual temperature T at the liquid level inside the pool wall of the tested part 50 - Design temperature T of the corresponding part 设=1435-1431=4℃<8℃, it is considered that the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the pool wall, and no adjustment is required. The melting furnace pool wall can continue to operate in this condition.

[0160] Example 2

[0161] This embodiment detects a 600-ton float glass production line in China. The melting furnace is 40m long (melting section + clarification section), 12m wide and 1.2m high. The specific part detected is the liquid level line position of the No. 6 pool wall on the main control side of the melting furnace. The refractory material of the melting furnace pool wall bricks used in this part is the pool wall 33# zirconium corundum bricks. The production line melts soda-lime-silica glass.

[0162] The method of the present invention is used to control the erosion rate of the furnace pool wall, comprising the following steps:

[0163] S1. Determine the design inner wall temperature value of the furnace pool wall brick at a certain operating time point;

[0164] S11, determine the erosion rate curve of the refractory material of the pool wall brick under reasonable working conditions, and obtain the relationship curve between the designed erosion amount and time of the melting furnace pool wall brick, see Example 1:

[0165] F 设 =(LF 20 )*t 控 / (365*t 设 )=(150-20)*t 控 / (365*6)=0.0594*t 控 (4)

[0166] Where, L is the thickness of the pool wall brick when the erosion rate begins to be accurately controlled, and is generally taken as 150mm; F 20 The thickness of the pool wall bricks when the bricks need to be tied is 20mm; t 设 is the designed operating life of the furnace wall bricks before the bricks are tied, which is generally 4-8 years. The designed operating life of the furnace wall selected in this embodiment before the bricks are tied is 6 years; 控 F is the time that the erosion rate of the pool wall tiles runs after precise control is implemented, in days; 设 t 控 The erosion amount of the pool wall tiles corresponding to the time, unit: mm;

[0167] S12, determine the relationship curve between the erosion amount and time of the furnace pool wall bricks under actual working conditions, see Example 1:

[0168] Through dynamic erosion experiments in the laboratory, it was found that the erosion rate of 33# zirconium corundum pool wall tiles in the corresponding sodium-lime-silicon glass liquid, that is, the relationship between the erosion amount of the pool wall tiles and the glass liquid temperature, the scouring speed of the glass liquid on the pool wall and the erosion time is:

[0169] F 侵 =0.48*e 0.015*T内 *(0.0006*n 2 -0.0015*n+0.591)*t 控 / 10 10 (5)

[0170] In the formula, F 侵 is the erosion amount of pool wall tiles, T 内 is the actual inner wall temperature of the furnace wall bricks, n is the scouring speed of the glass liquid on the pool wall, t 控 It is the running time after the erosion rate of pool wall tiles is precisely controlled.

[0171] S13, assuming that the erosion amount of the furnace pool wall bricks under reasonable working conditions is equal to that under actual working conditions, solve and obtain the design inner wall temperature value of the furnace pool wall bricks at a certain operating time point;

[0172] After the erosion rate of the pool wall bricks in the tested area is precisely controlled, the designed erosion thickness of the pool wall zirconium corundum bricks after 300 days of operation is:

[0173] That is, 控 = 300 days, substituting into formula (4), the designed erosion thickness of the zirconium corundum bricks on the pool wall is:

[0174] F 设 =0.0594*t 控 =0.0594*300=17.82mm

[0175] In the formula, F 设 is the designed erosion amount of the pool wall tiles, t 控 It is the running time after the erosion rate of pool wall tiles is precisely controlled.

[0176] After precise control of the pool wall tiles, the designed erosion amount after 300 days of operation is equal to the actual erosion amount. 实 =F 设 , F 设 =17.82mm Substituting into formula (5), we get:

[0177] 17.82 = 0.48 * e 0.015*T内 *(0.0006*n 2 -0.0015*n+0.591)*t 控 / 10 10 (6)

[0178] Where, T 内is the temperature at the liquid level on the inner side of the furnace pool wall, i.e. the designed inner wall temperature of the furnace pool wall bricks, in °C; n is the flushing speed of the glass liquid on the pool wall bricks, in rpm; t 控 The operating time of the pool wall brick erosion rate after precise control is implemented, which is 300 days;

[0179] According to F 设 =F 实 , find T 内

[0180] At this time T 设 =T 内

[0181] Where: T 设 It is the set inner wall temperature value of the furnace pool wall brick at a certain operating time point;

[0182] Then, the designed inner wall temperature T of the furnace pool wall bricks with an erosion time of 300 days is obtained after the erosion rate of the pool wall bricks is precisely controlled. 设 ;

[0183] Among them, the calculation of the scouring speed n of the glass liquid on the liquid surface line of the pool wall can be found in "Glass" magazine, Issue 6, 2017, Wei Lifang, "The influence of glass liquid flow in the melting furnace on glass quality", pages 18-19, and the result is:

[0184] S=F*G / (24*r*h*b)

[0185] Where: S is the flow rate of the glass liquid (m / h); F is the flow coefficient (taken as 9.29); G is the pulling amount (600 tons); r is the average density of the glass liquid (2.16 g / cm 3 ); h-thickness of glass surface flow (429 mm); b-kiln width (12 m);

[0186] That is: S = 9.29 * 600 / (24 * 2.16 * 0.429 * 12) = 20.89 m / h, the diameter D of the pool wall brick sample used in the dynamic experiment is 30 mm, so,

[0187] n = S * 1000 / (π * D * 60) = 20.89 * 1000 / (3.14 * 30 * 60) = 3.696 rpm;

[0188] Where: n is the rotation speed of the pool wall zirconium corundum rod sample used in the dynamic experiment (r / min), S is the glass liquid flow rate (m / h), and D is the diameter of the pool wall zirconium corundum rod sample used in the dynamic experiment (mm).

[0189] The flushing speed of the glass liquid on the pool wall tiles is n = 3.696 rpm, t 控= 300 days, substitute into formula (6), and the solution is the design temperature T at the liquid level line on the inner side of the furnace pool wall of the tested part 设 =T 内 =1431℃.

[0190] S2, determining the actual inner wall temperature value of the furnace pool wall brick at a certain operating time point;

[0191] After the erosion rate of the furnace wall bricks was precisely controlled, the liquid level position of the No. 6 wall of the main operation side of the furnace was tested using the technology of the present invention after 300 days of operation. The outer wall temperature of the tested part was collected by infrared thermal imaging and was 236°C. The ambient temperature was measured by mercury thermometer and was 43.1°C. The cooling wind speed of the wall of the tested part was collected by an anemometer and was 35.5m / s. The equivalent size of the wall bricks at the tested part was measured by a ruler and was 0.4*0.1m. The average temperature of the wall bricks is (1431+236)

[0192] / 2=833.5℃, when the zirconium corundum bricks of the pool wall to be tested are at 833.5℃, the thermal conductivity λ=3.736W / mk, and the heat flux density value of the part to be tested collected by the heat flow meter is 35521W / m 2 .

[0193] So the heat flow value is Q 热 =35521*0.4*0.1=1420.84W;

[0194] According to the "Glass Industry Thermal Process and Equipment Table", the blackness of refractory corundum bricks at 1000°C is ε = 0.46, and the blackbody radiation coefficient C0 = 5.669W / (m 2 *k 4 );

[0195] According to the energy balance principle, the outer wall of the furnace pool to be tested is taken as the research object. The radiation heat Q of the outer wall of the furnace pool facing the air 辐 Heat conduction from the inner wall of the pool to the outer wall Q 传 The sum is equal to the heat flow value detected by the heat flow meter;

[0196] That is: heat flow heat Q 热 =Conduction heat Q 传 + Radiant Heat Q 辐

[0197] Radiant heat Q 辐 =ε*A*C0*[(T 外 / 100) 4 -(T 环 / 100) 4 ],

[0198] Where: ε is the blackness value of the pool wall brick, which is 0.46; C0 is the blackbody radiation coefficient, C0 = 5.669W / (m 2 *k 4 ); A is equivalent area, value is 0.4*0.1m 2 ; T 外 is the temperature of the outer wall of the melting furnace pool, which is 236℃ measured by infrared instrument; T 环 It is the ambient temperature, that is, the ambient temperature outside the melting furnace pool wall, and the mercury thermometer measured 43.1℃.

[0199] Radiant heat Q 辐 =ε*A*C0*[(T 外 / 100) 4 -(T 环 / 100) 4 ]=0.46*0.4*0.1*5.669

[0200] *{[(236+273) / 100] 4 -(43.1+273) / 100] 4}=59.6W;

[0201] Conduction heat Q 传 = Heat flow heat Q 热 -Radiant heat Q 辐 =1420.84-59.6=1361.24W

[0202] Conduction heat Q 传 =q 传 *A=λ*(T 内 -T 外 )*A / δ,

[0203] Where λ is the thermal conductivity of the pool wall brick, which is 3.736W / mk; T 外 is the outer wall temperature of the melting furnace pool, which is 236℃; T 内 is the temperature of the outer wall of the melting furnace pool; A is the equivalent area, with a value of 0.4*0.1=0.04m 2 ;δ is the remaining thickness of the pool wall;

[0204] Among them, the remaining thickness δ of the pool wall brick is: LF 设 =150-17.82=132.18mm

[0205] In the formula, F 设 For pool wall tiles in t 300 L is the designed erosion amount when the erosion rate of the pool wall tiles begins to be precisely controlled.

[0206] Conduction heat Q 传 =q传 *A=λ*(T 内 -T 外 )*A / δ=3.736*(T 内 -236)*0.04 / (132.18*10 -3 )=1361.24W;

[0207] The solution is: T 内 =1440℃, that is, after the furnace has been running for 300 days, the actual temperature at the liquid level on the inner side of the pool wall is 1440℃.

[0208] S3. Judgment of pool wall erosion rate: The actual temperature T at the liquid level inside the pool wall of the tested part 300 - Design temperature T of the corresponding part 设 =1440-1431=9℃>8℃, indicating that the erosion rate of the furnace pool wall is fast, and the glass melting process needs to be corrected and the pool wall cooling effect needs to be adjusted. The adjustment method is:

[0209] First, the glass melting process of the melting furnace was checked and calibrated. After inspection by the melting process personnel, it was confirmed that the glass melting temperature of the melting furnace met the melting process requirements, the pulling capacity of the melting furnace was 600 tons (within the normal range), and the output and quality of the glass products were qualified;

[0210] Then the kiln maintenance technicians increased the cooling wind speed of the pool wall from the original 35.5 m / s to 42 m / s. After the melting process stabilized, the pool wall data was collected again. The outer pool wall temperature of the part to be tested was collected using an infrared thermal imager and was 221°C. The ambient temperature was measured using a mercury thermometer and was 44.6°C. The average temperature of the pool wall bricks, i.e. (1431+221) / 2=826°C, the thermal conductivity of the zirconium corundum bricks of the pool wall to be tested was 826°C, λ=3.758W / mk, and the heat flux density value of the part to be tested collected using a heat flux density meter was 35774W / m 2 .

[0211] Calculate according to the above step S2:

[0212] Radiant heat Q 辐 =ε*A*C0*[(T 外 / 100) 4 -(T 环 / 100) 4 ]=0.46*0.4*0.1*5.669

[0213] *{[(221+273) / 100] 4 -(44.6+273) / 100] 4 =51.51W

[0214] Heat flow Q热 =35774*0.4*0.1=1430.96W

[0215] Conduction heat Q 传 = Heat flow heat Q 热 -Radiant heat Q 辐 =1430.96-51.51=1379.45W

[0216] Conduction heat Q 传 =q 传 *A=λ*(T 内 -T 外 )*A / δ=3.758*(T 内 -221)*0.04 / (132.18*10 -3 )=1379.45W

[0217] The solution is: T 内 =1434℃, that is, after the cooling wind of the pool wall is adjusted, the actual temperature at the liquid level line on the inner side of the pool wall is 1434℃ after the melting furnace has been running for 300 days.

[0218] The actual temperature at the liquid level line on the inner side of the pool wall of the tested part - the design temperature of the corresponding part = 1434-1431 = 3℃<8℃. It is considered that the actual inner wall temperature of the melting furnace pool wall is equal to the design inner wall temperature of the pool wall. The cooling air speed is adjusted appropriately this time, and the melting furnace pool wall can continue to operate in this condition.

[0219] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for controlling the erosion rate of furnace pool wall bricks, characterized in that: The steps include: S1. Determine the design inner wall temperature value of the furnace pool wall brick at a certain operating time point; S2, determining the actual inner wall temperature value of the furnace pool wall brick at a certain operating time point; S3. Compare the designed inner wall temperature of the furnace pool wall bricks with the actual inner wall temperature of the furnace pool wall bricks at the same time point, and adjust the cooling air volume and cooling method.

2. The method for controlling the erosion rate of furnace pool wall bricks according to claim 1, characterized in that: Determining the design inner wall temperature value of the furnace pool wall brick at a certain operation time point in step S1 includes: S11. Determine the design erosion rate curve of the furnace pool wall bricks under ideal working conditions: F 设 =(L-F 20 )*t 控 / t 设 Where, L is the thickness of the pool wall brick when the erosion rate begins to be precisely controlled; F 20 The thickness of the pool wall bricks when brick binding is required; t 设 is the designed operating life of the furnace pool wall bricks before tying; t 控 F is the time of operation of the pool wall tiles after the erosion rate of the pool wall tiles is precisely controlled; 设 t 控 The amount of erosion of the pool wall tiles corresponding to the time; S12. Determine the relationship between the erosion amount and time of the furnace pool wall bricks under actual working conditions: F 实 =a1*e (b1*T 内 )*(a2*n 2 +b2*n+c2)*a3*t 控 In the formula, F 实 is the erosion amount of pool wall tiles under actual working conditions; T 内 is the actual inner wall temperature of the furnace wall bricks; n is the scouring speed of the glass liquid on the wall bricks; t 控 It is the time for the pool wall tiles to run after precise control is implemented; a1, a2, a3, b1, b2, c2 are all coefficients, which are selected according to the model of the pool wall tiles and the type of glass liquid; S13. Assuming that the erosion amount of the furnace pool wall bricks under ideal working conditions is equal to that under actual working conditions, the design inner wall temperature value of the furnace pool wall bricks at a certain operating time point is obtained: According to F 设 =F 实 , find T 内 At this time T 设 =T 内 Where: T 设 It is the designed inner wall temperature value of the furnace pool wall bricks at a certain operating time point.

3. The method for controlling the erosion rate of furnace pool wall bricks according to claim 1, characterized in that: The step S2 of determining the actual inner wall temperature value of the furnace pool wall brick at a certain operation time point includes: S21, heat flow Q detected by heat flow meter 热 ; S22. Calculate the radiation heat Q of the outer wall of the melting furnace pool facing the air 辐 Heat conduction Q from the inner wall of the furnace pool to the outer wall 传 : Q 辐 =ε*A*C0*[(T 外 / 100) 4 -(T 环 / 100) 4 ] Where ε is the blackness value of the pool wall brick, A is the equivalent area, C0 is the blackbody radiation coefficient, T 外 is the outer wall temperature of the furnace pool, T 环 is the ambient temperature; Q 传 =q 传 *A=λ*(T 内 -T 外 )*A / δ In the formula, q 传 It represents the heat flux density value of the pool wall brick, A is the equivalent area, λ is the thermal conductivity of the pool wall brick, T 内 is the actual inner wall temperature of the furnace pool bricks, T 外 is the outer wall temperature of the furnace pool, and δ is the remaining thickness of the pool wall; S23. According to Q 热 =Q 辐 +Q 传 , solve to obtain the actual inner wall temperature T of the furnace pool wall brick at a certain operating time point 内 .

4. The method for controlling the erosion rate of furnace pool wall bricks according to claim 3, characterized in that: Step S3 compares the designed inner wall temperature of the melting furnace pool wall bricks with the actual inner wall temperature of the melting furnace pool wall bricks at the same time point, and adjusts the cooling air volume and cooling method, including: first determining the melting process, and then adjusting the cooling air volume and cooling method in turn.

5. The method for controlling the erosion rate of furnace pool wall bricks according to claim 4, characterized in that: The step S3 compares the designed inner wall temperature of the furnace pool wall bricks at the same time point and the actual inner wall temperature of the furnace pool wall bricks at the same time point during operation, and adjusts the cooling air volume and cooling method, including: S31. When the actual inner wall temperature of the melting furnace pool wall is less than / greater than the designed inner wall temperature of the melting furnace pool wall, the melting furnace glass melting process must first be verified to determine whether the melting process is appropriate. If the melting process is not appropriate after verification, the melting process is adjusted; S32. After the melting process of the melting furnace is adjusted appropriately, the actual inner wall temperature of the melting furnace pool wall is calculated again, and the numerical value is compared with the designed inner wall temperature of the melting furnace pool wall: When the actual inner wall temperature of the melting furnace pool is equal to the designed inner wall temperature of the pool wall, no adjustment is made; When the actual inner wall temperature of the melting furnace pool wall is lower than the designed inner wall temperature of the pool wall, it indicates that the erosion rate of the melting furnace pool wall bricks is slow. Reduce the cooling air volume on the outer side of the pool wall 1-3 times until the actual inner wall temperature of the pool wall is equal to the designed inner wall temperature of the pool wall. When the actual inner wall temperature of the melting furnace pool wall is more than 50℃ higher than the designed inner wall temperature of the pool wall, it indicates that the corrosion rate of the melting furnace pool wall bricks is very fast. The water cooling method on the outer side of the melting furnace pool wall should be directly used for treatment until the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the melting furnace pool wall. When the actual inner wall temperature of the melting furnace pool wall is 50℃ higher than the designed inner wall temperature of the pool wall, it indicates that the erosion rate of the melting furnace pool wall bricks is fast, and the cooling air volume outside the pool wall should be increased; S33. When the cooling air volume on the outside of the pool wall is increased, the actual inner wall temperature of the melting furnace pool wall is calculated again, and the numerical value is compared with the designed inner wall temperature of the melting furnace pool wall. When the actual inner wall temperature of the pool wall is still greater than the designed inner wall temperature of the pool wall, the cooling air volume on the outside of the pool wall is increased 1-2 times again, and the actual inner wall temperature of the melting furnace pool wall is calculated, and the numerical value is compared with the designed inner wall temperature of the melting furnace pool wall. When the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the melting furnace pool wall, no further adjustment is made; when the actual inner wall temperature of the pool wall is still greater than the designed inner wall temperature of the pool wall, a water cooling method is added on the outside of the melting furnace pool wall until the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the melting furnace pool wall.

6. The method for controlling the erosion rate of furnace pool wall bricks according to claim 5, characterized in that: The water cooling method is a water bag cooling method, or a water bag cooling method followed by a spray cooling method, until the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the melting furnace pool wall.

7. The method for controlling the erosion rate of furnace pool wall bricks according to any one of claims 1 to 6, characterized in that: The method further comprises: In the later stage of the operation of the melting furnace pool wall, when the designed inner wall temperature of the melting furnace pool wall is greater than the actual inner wall temperature of the melting furnace pool wall by 50°C or the actual inner wall temperature of the pool wall is lower than 1380°C, the melting furnace pool wall is treated by hot repair and brick binding, and then the designed inner wall temperature of the melting furnace pool wall bricks at a certain time point and the actual inner wall temperature of the melting furnace pool wall are recalculated according to the method described in steps S1 and S2, and the actual inner wall temperature of the melting furnace pool wall and the designed inner wall temperature of the melting furnace pool wall are compared according to the method described in step S3, and the cooling air volume and cooling method are adjusted until the actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the pool wall.

8. The method for controlling the erosion rate of furnace pool wall bricks according to claim 7, characterized in that: The actual inner wall temperature of the melting furnace pool wall is equal to the designed inner wall temperature of the pool wall, which means that the difference between the two is within 8°C.

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