Method for improving process stability of glass melting furnace and glass production method

Abstract

The present disclosure provides a method for improving the process stability of a glass melting furnace and a glass production method. The method for improving the process stability of a glass melting furnace comprises the following steps: raising the liquid level in the furnace; withdrawing the feeder; blocking the feed port of the furnace and cleaning the material pile at the feed port; reinstalling the feeder; and restoring the production process before cleaning. The liquid level in the furnace is raised in advance to ensure that the liquid level in the furnace fluctuates less after the feed port is cleaned, so as to avoid affecting the yield of the product; and then the feed port is blocked to reduce the viscosity of the material pile through the higher temperature of the furnace, so that it can flow as quickly and easily as possible, improve the volume of the material pile, reduce the swing of the tail of the material mountain, improve the stability of the temperature at the bottom of the pool, and greatly improve the cleaning efficiency and cleaning effect, thereby obtaining a better clarification and defoaming effect and achieving a higher yield level.

Description

Technical Field

[0001] The present disclosure relates to the technical field of glass production, and in particular to a method for improving the process stability of a glass melting furnace and a glass production method. Background Art

[0002] In the glass substrate production process, the mixed (electric energy, gas energy) heating furnace melting process parameters have strict control standards. The kiln process is relatively stable when the flow is stable, but when the shape and size of the material pile changes, it usually causes the tail of the material pile to swing frequently. Furthermore, the temperature at the bottom of the kiln pool continues to fluctuate due to the influence of the circulation, the temperature stability of the bottom of the pool deteriorates, the clarification effect is reduced, and the yield level of the product decreases.

[0003] In response to the situation where changes in the material pile affect the temperature fluctuations at the bottom of the pool, some manufacturers remove the powder on the surface of the material pile by removing the feeder.

[0004] However, since the pile of materials has been accumulated for a long time, the material pile itself is very sticky and the cleaning effect is poor. The liquid level in the furnace fluctuates greatly before and after cleaning, and there is no obvious improvement in the stability of the material pile and the material unloading status. Summary of the invention

[0005] A technical problem to be solved by the present disclosure is that the material pile at the kiln feed inlet has been accumulated for a long time, the material pile itself is very viscous, the cleaning effect is poor, the liquid level in the furnace fluctuates greatly before and after cleaning, and the stability of the material pile and the improvement of the material feeding state are not obvious.

[0006] In order to solve the above technical problems, the present disclosure provides a method for improving the process stability of a glass melting furnace, which comprises the following steps:

[0007] Raise the liquid level in the kiln;

[0008] Remove the feeder;

[0009] Seal the charging port of the kiln and clean up the material pile at the charging port;

[0010] Reloading feeder;

[0011] Restore the production process before cleaning.

[0012] In some embodiments, the aforementioned method for improving the process stability of a glass melting furnace, wherein the step of raising the liquid level in the furnace is specifically:

[0013] Raise the liquid level in the kiln furnace to the upper control limit to ensure that the fluctuation range of the liquid level in the furnace is within the control range before and after the charging port cleaning operation.

[0014] In some embodiments, the aforementioned method for improving the process stability of a glass melting furnace, wherein the step of blocking the charging port of the furnace and cleaning the material pile at the charging port comprises:

[0015] The heat-insulating material blocks the feed port;

[0016] Stabilize the pressure in the furnace;

[0017] Observe the volume and status of the stockpile;

[0018] Unblock after a specified period of time.

[0019] In some embodiments, in the aforementioned method for improving the process stability of a glass melting furnace, the thermal insulation material is thermal insulation foam.

[0020] In some embodiments, the aforementioned method for improving the process stability of a glass melting furnace, wherein the step of stabilizing the pressure in the furnace is specifically:

[0021] Adjust the furnace valve plate or the exhaust force of the range hood.

[0022] In some embodiments, in the aforementioned method for improving the process stability of a glass melting furnace, the specified time period is 5 min-10 min.

[0023] In some embodiments, the aforementioned method for improving the process stability of a glass melting furnace, wherein the step of observing the volume and state of the pile of materials is specifically as follows:

[0024] Observe the volume and state of the material pile at the opening on the rear wall of the kiln until the volume of the material pile decreases and the viscosity becomes lower.

[0025] In some embodiments, the aforementioned method for improving the process stability of a glass melting furnace, wherein the step of blocking the charging port of the furnace and cleaning the material pile at the charging port further comprises:

[0026] After unblocking, manually clean the powder at the feeding port.

[0027] In some embodiments, the aforementioned method for improving the process stability of a glass melting furnace, wherein the step of reinstalling the charging machine comprises:

[0028] Check whether the feeder is operating normally;

[0029] The feeder is normal. Clean the crystals on the water cooling jacket of the feeder and the powder adhering to the outlet of the screw rod of the feeder. Replace the insulation cotton on the feeder and confirm that the cooling water inlet and return water of the feeder are normal.

[0030] A second aspect of the present application provides a glass production method, which includes at least one of the aforementioned methods for improving the process stability of a glass melting furnace.

[0031] Through the above technical scheme, the method for improving the process stability of the glass melting furnace provided by the present disclosure ensures that the fluctuation of the liquid level in the furnace is small after the charging port is cleaned by raising the liquid level in the furnace in advance, so as to avoid affecting the yield of the product; and then the charging port is blocked to reduce the viscosity of the pile through the higher temperature of the furnace, so that it can flow as quickly and easily as possible, improve the volume of the pile, reduce the swing of the tail of the pile, improve the stability of the temperature at the bottom of the pool, greatly improve the cleaning efficiency and cleaning effect, thereby obtaining a better clarification and defoaming effect and achieving a higher yield level. It effectively solves the problem that the material pile itself has a high viscosity and poor cleaning effect due to the long-term accumulation of the material pile at the charging port of the kiln, the liquid level in the furnace fluctuates greatly before and after cleaning, and the stability of the pile and the improvement of the feeding state are not obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 It is a schematic flow chart of a method for improving the process stability of a glass melting furnace disclosed in an embodiment of the present disclosure;

[0034] Figure 2 It is a detailed flow chart of the method for improving the process stability of a glass melting furnace disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0036] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0037] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0038] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0039] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0040] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0041] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0042] The kiln system includes a large silo, a feeder, and a kiln (including a feed port); in normal production, the first-level feeding screw adds the mixture from the large silo to the feeder, and the feeder then adds the mixture to the slope bricks inside the kiln feeding port through the second-level feeding screw. The mixture slides into the furnace from the slope bricks, and part of the mixture stays on the slope, while part of the mixture forms a pile of materials on the glass liquid surface in the furnace; the size change and stability of the pile will cause fluctuations in the tail of the material mountain, which will in turn affect the temperature stability of the pool bottom and the generation of bubble defects. Since the material pile itself has high viscosity, the surface powder of the material pile at the slope brick is manually removed after the feeder is directly withdrawn, and the cleaning effect is not good. The liquid level fluctuates greatly before and after cleaning, and there is no obvious improvement in the stability of the material pile, the feeding state, and the stability of the material mountain, or the improvement is short-lived, and the product yield cannot be effectively guaranteed. The above system structure can be easily understood by those skilled in the art, and will not be elaborated on here. This embodiment provides a method for improving the process stability of a glass melting furnace in response to the above problem, and the specific steps are as follows:

[0043] Embodiment 1

[0044] Reference Figure 1 This embodiment discloses a method for improving the process stability of a glass melting furnace, which comprises the following steps:

[0045] 101. Raise the liquid level in the kiln;

[0046] Specifically, by adjusting the feeding frequency of the first-level feeding screw and the second-level feeding screw, feeding is performed at a flow rate higher than the normal flow rate in a relatively short period of time to increase the liquid level in the kiln; the liquid level in the kiln needs to be raised to the control upper limit to ensure that the fluctuation amplitude of the liquid level in the furnace before and after the cleaning operation of the feeding port is within the control range, so as to avoid excessive drop in the liquid level in the furnace after cleaning, which affects the timeliness of resuming production and the yield of the product. The aforementioned control upper limit and the control range of the fluctuation amplitude are easily understood by those skilled in the art, and have different values ​​according to different production equipment, so they will not be elaborated here. The time to increase the flow rate and raise the liquid level can be, but is not limited to, 10 minutes. This time can be designed and adjusted according to different production equipment to ensure that it does not affect the normal production in the kiln.

[0047] 102. Remove the feeder;

[0048] Specifically, stop the first-stage feeding screw and the second-stage feeding screw, release the fixation of the feeder after the feeding stops, withdraw the feeder and perform a preliminary cleaning of the surface accumulated material at the feeding port of the kiln.

[0049] 103. Block the charging port of the kiln and clean up the material pile at the charging port;

[0050] Specifically, the charging port is blocked with insulating materials for a specified period of time, and the high temperature in the kiln is used to heat up the inside of the kiln, so that the material pile at the slope turns is softened by the heat, the viscosity is reduced, and it flows downward under the action of gravity, thereby reducing the volume of the material pile, playing the role of clearing the material pile at the charging port, and then the blockage is released.

[0051] The thermal insulation material may be a thermal insulation material having flame retardant properties, and may be, but is not limited to, thermal insulation foam.

[0052] 104. Reloading feeder;

[0053] Specifically, after removing the blockage of the feeding port, reinstall the feeding machine and gradually resume normal production; before reinstalling the feeding machine, it is necessary to check whether the feeding machine is operating normally, and focus on checking whether the water cooling jacket and the water inlet and return pipes of the feeding machine are leaking, and whether the feeding machine is operating normally;

[0054] If the feeder is normal, clean the crystals on the water cooling jacket of the feeder and the powder adhering to the outlet of the screw rod of the feeder, replace the insulation cotton on the feeder, and confirm that the cooling water inlet and return water of the feeder are normal;

[0055] If the feeder does not operate normally, replace it with a spare feeder. Before reinstallation, you need to confirm that the spare feeder operates normally and the cooling water inlet and return of the feeder are normal.

[0056] After loading the feeder, confirm the advancement depth of the feeder water cooling jacket and the swing direction of the feeder, select the optimal advancement depth and fix the feeder to prevent deviation. This step can be easily understood by those skilled in the art and will not be described in detail here.

[0057] It is understandable that the step of checking the feeder can be performed simultaneously with step 103 to improve the cleaning efficiency.

[0058] 105. Restore the production process before cleaning;

[0059] Specifically, the feeding port is cleaned and the feeding machine is reinstalled, and the kiln process is gradually restored to a stable and normal production state by adjusting parameters such as the feeding amount, the temperature of the kiln's crown bricks, and the pressure inside the furnace. Specifically, the feeding amount is increased within the melting capacity of the kiln to compensate for the drop in liquid level caused by the cleaning process. This operation can be easily understood by those skilled in the art and will not be elaborated on here.

[0060] According to the above, the method for improving the process stability of the glass melting furnace provided by the present disclosure ensures that the fluctuation of the liquid level in the furnace is small after the cleaning of the feed port by raising the liquid level in the furnace in advance, so as to avoid affecting the yield of the product; and then the feed port is blocked to reduce the viscosity of the pile through the higher temperature of the furnace, so that it can flow as quickly and easily as possible, improve the volume of the pile, reduce the swing of the tail of the pile, improve the stability of the temperature at the bottom of the pool, greatly improve the cleaning efficiency and cleaning effect, thereby obtaining a better clarification and defoaming effect and achieving a higher yield level. It effectively solves the problem that the pile itself has a high viscosity and poor cleaning effect due to the long-term accumulation of the pile at the feed port of the kiln, the liquid level in the furnace fluctuates greatly before and after cleaning, and the stability of the pile and the improvement of the feeding state are not obvious.

[0061] The term "and / or" in this article is merely a description of the association relationship of associated objects, identifying three possible relationships. For example, A and / or B is specifically understood as: A and B can be included at the same time, A can exist alone, or B can exist alone, and any of the above three situations can be met.

[0062] In some embodiments, refer to the attached Figure 2 In the method for improving the process stability of the glass melting furnace provided in this embodiment, in a specific implementation, the above step 103 specifically includes the following steps:

[0063] 301. The feeding port is blocked with thermal insulation material;

[0064] Specifically, the temperature of the kiln is increased by using the high temperature in the kiln and the temperature of the interior is increased by using the temperature feeding port of the insulation material. The insulation material may be, but is not limited to, insulation foam. The designated time may be, but is not limited to, 5-10 minutes, and the design is adjusted specifically according to the state change of the material pile.

[0065] 302. Stabilize the pressure in the furnace;

[0066] After the charging port is blocked, smoke and water vapor will be generated due to the normal operation of the kiln and the discharge port, which can easily increase the pressure in the furnace and affect the yield of the product. In this embodiment, the pressure can be released and adjusted by adjusting the furnace valve plate or the suction force of the smoke exhaust fan; it can be understood that: a pressure detection device is provided in the kiln, and the staff can determine whether pressure adjustment is needed through the detection data of the pressure detection device, so as to ensure that the pressure in the furnace is consistent with the pressure during normal production, so as to avoid affecting the yield of the product. This setting can be easily understood by those skilled in the art and will not be elaborated on here.

[0067] 303. Observe the volume and status of the stockpile;

[0068] Specifically, for the kiln, the feeding port is arranged on its front wall, and an opening is arranged on its rear wall. The method provided in this embodiment can observe the volume and state of the material pile at the opening on the rear wall of the kiln until the volume of the material pile decreases and the viscosity decreases. When the volume of the material pile decreases and / or the viscosity of the material pile decreases, the blocking of the feeding port can be stopped.

[0069] 304. Unblock after a specified period of time;

[0070] Specifically, the plugging time can be determined by referring to the above content, for example, by setting a specified time period by using experience or multiple test calculations, or by observing the state of the stockpile.

[0071] In some embodiments, refer to the attached Figure 2 In the specific implementation of the method for improving the process stability of the glass melting furnace provided in this embodiment, the above step 103 further includes the following steps:

[0072] 106. After unblocking, manually clean the powder at the feeding port;

[0073] Specifically, in order to avoid the inability to completely clean up the material pile on the slope under the action of gravity, step 106 is added in this embodiment. After the blockage is released, the remaining material pile on the slope is pushed into the furnace using a tool. Under the premise that the viscosity of the material pile is reduced, it is easier to push and the cleaning degree is also higher, which effectively ensures that the cleaning is complete.

[0074] Embodiment 2

[0075] This embodiment provides a glass production method, which includes the method for improving the process stability of a glass melting furnace.

[0076] Specifically, the above-mentioned method for improving the process stability of the glass melting furnace, that is, the method for improving the process stability of the glass melting furnace in Example 1, its working principle please refer to the detailed description of Example 1, and will not be elaborated on here; in the glass production process, after the kiln system has been in normal production for a certain period of time, the method for improving the process stability of the glass melting furnace in Example 1 can be used to deeply and completely clean the material pile at the feeding port, thereby improving the volume of the material pile, reducing the swing of the tail of the material mountain, and improving the stability of the temperature at the bottom of the pool, greatly improving the cleaning efficiency and cleaning effect, thereby obtaining a better clarification and defoaming effect and achieving a higher yield level.

[0077] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0078] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A method for improving the process stability of a glass melting furnace, characterized in that: It includes the following steps: Raise the liquid level in the kiln; Remove the charging machine and conduct preliminary cleaning of the surface material accumulation at the charging port of the kiln; The heat-insulating material blocks the kiln's charging port; Stabilize the pressure in the furnace; Observe the volume and status of the stockpile; Unblock after a specified period of time; Reloading feeder; Restore the production process before cleaning.

2. The method for improving the process stability of a glass melting furnace according to claim 1, characterized in that: The steps to raise the liquid level in the kiln are as follows: Raise the liquid level in the kiln furnace to the upper control limit to ensure that the fluctuation range of the liquid level in the furnace is within the control range before and after the charging port cleaning operation.

3. The method for improving the process stability of a glass melting furnace according to claim 1, characterized in that: The thermal insulation material is thermal insulation foam.

4. The method for improving the process stability of a glass melting furnace according to claim 1, characterized in that: The steps to stabilize the pressure in the furnace are as follows: Adjust the furnace valve plate or the exhaust force of the range hood.

5. The method for improving the process stability of a glass melting furnace according to claim 1, characterized in that: The specified time period is 5 min-10 min.

6. The method for improving the process stability of a glass melting furnace according to claim 1, characterized in that: The steps to observe the volume and status of the stockpile are as follows: Observe the volume and state of the material pile at the opening on the rear wall of the kiln until the volume of the material pile decreases and the viscosity becomes lower.

7. The method for improving the process stability of a glass melting furnace according to claim 1, characterized in that: The steps of unblocking after a specified period of time also include: After unblocking, manually clean the powder at the feeding port.

8. The method for improving the process stability of a glass melting furnace according to claim 1, characterized in that: The steps of reinstalling the feeder include: Check whether the feeder is operating normally; The feeder is normal. Clean the crystals on the water cooling jacket of the feeder and the powder adhering to the outlet of the screw rod of the feeder. Replace the insulation cotton on the feeder and confirm that the cooling water inlet and return water of the feeder are normal.

9. A glass production method, characterized in that: It includes: The method for improving the process stability of a glass melting furnace as described in any one of claims 1 to 8.

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