CN110563311A - Method for ensuring stable convection in tank furnace by replacing batch feeder - Google Patents
Method for ensuring stable convection in tank furnace by replacing batch feeder Download PDFInfo
- Publication number
- CN110563311A CN110563311A CN201910797393.6A CN201910797393A CN110563311A CN 110563311 A CN110563311 A CN 110563311A CN 201910797393 A CN201910797393 A CN 201910797393A CN 110563311 A CN110563311 A CN 110563311A
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- Prior art keywords
- batch
- replaced
- feeding
- feeder
- batch feeder
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B3/00—Charging the melting furnaces
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B3/00—Charging the melting furnaces
- C03B3/005—Charging the melting furnaces using screw feeders
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/04—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in tank furnaces
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention discloses a method for ensuring stable convection in a tank furnace by replacing batch feeders, wherein at least two batch feeders are arranged in the tank furnace; 1. replacing the feeder to be replaced and stopping the feeder to be replaced, wherein during the replacement, the non-replaced feeder works normally and the opening degree is constant all the time; 2. after the replacement of the batch feeder to be replaced is completed, opening the replaced batch feeder to feed; 3. after the feeding amount is stable, comparing the feeding amounts of the replaced feeding machines with the feeding amounts of the non-replaced feeding machines to ensure that the feeding amount difference value of each feeding machine is within 5 Kg; and synchronously increasing the feeding amount of all the feeding machines, and recovering the liquid level height, wherein the recovery amplitude of the liquid level height is 0.5-1.5mm/4 h; 4. and when the liquid level returns to the required height, the feeding amount of all the feeding machines returns to the normal working feeding amount. The height of the liquid level is reduced by a small amount, so that unstable convection of the tank furnace caused by great adjustment of the feeding amount is reduced.
Description
Technical Field
The invention belongs to the field of cover plate and substrate glass manufacturing, and relates to a method for ensuring stable convection in a tank furnace by replacing a batch feeder.
Background
in the manufacture of cover plate and substrate glass, the cover plate and substrate glass tank furnace feeding equipment is common equipment and is mainly used for continuously feeding batch materials into the tank furnace, the feeding equipment is used as main equipment of the cover plate and the substrate, various faults are avoided, the service life of the current feeding equipment is short, the replacement is frequent, and during the replacement of the feeding equipment of the current tank furnace, the feeding amount is easily adjusted greatly, so that the convection in the tank furnace is unstable, and meanwhile, the instability of stone and bubble states is influenced by the instability of convection in the tank furnace.
disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for ensuring stable convection in a tank furnace by replacing a batch feeder, so that the influence of the replacement of the whole batch feeder on the convection in the tank furnace is reduced.
in order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a method for ensuring stable convection in a tank furnace by replacing batch feeders is characterized in that at least two batch feeders are arranged in the tank furnace;
Comprises the following steps;
Replacing a feeder to be replaced, and stopping the feeder to be replaced, wherein during replacement, the non-replaced feeder works normally and the opening degree is constant all the time;
step two, after the replacement of the batch feeder to be replaced is completed, opening the replaced batch feeder to feed;
Step three, after the feeding amount is stable, comparing the feeding amounts of the replaced feeding machines with the feeding amounts of the non-replaced feeding machines to ensure that the feeding amount difference value of each feeding machine is within 5 Kg; and synchronously increasing the feeding amount of all the feeding machines, and recovering the liquid level height, wherein the recovery amplitude of the liquid level height is 0.5-1.5mm/4 h;
And step four, after the liquid level is restored to the required height, the feeding amount of all the feeding machines is restored to the normal working feeding amount.
Preferably, when the liquid level is reduced by more than or equal to 10mm during the replacement, the feeding amount of the non-replaced feeding machine is increased, and the rising amplitude of the liquid level is ensured to be more than 0mm/4 h and less than 1mm/4 h.
preferably, the replacement of the feeder to be replaced is carried out by repeating the steps one to seven when the feeder is normally and continuously used for more than 10 months, when the melting defect is abnormally changed, when the operating current of the feeder is increased by 20% or more, when the feeder moves by more than 10mm relative to the initial working position, when the feeding amount of the single-sided feeder is lower than the normal 20kg for two hours due to the feeder, or when the feeder is out of order.
preferably, the batch materials sequentially pass through a large storage bin, a primary feeding screw, a small storage bin, a blanking flashboard, a batch feeder and a feeding port and then enter the molten glass;
the specific replacement method comprises the following steps;
Step 1), after stopping a primary feeding screw arranged between a small bin and a large bin, closing a feeding gate of a bin of a feeding machine to be replaced;
Step 2), after confirming that no batch mixture exists between the batch feeder bin to be replaced and the small bin connecting part, splitting the batch feeder to be replaced and the small bin;
Step 3), moving out the batch feeder to be replaced from the working position, and stopping the operation of the batch feeder to be replaced;
step 4), cleaning a feeding port;
Step 5), after the batch inlet is cleaned, filling the batch bin of the replaced batch feeder with batch;
step 6), moving the replaced batch feeder to a working position, connecting the replaced batch feeder with a small storage bin, and starting the replaced batch feeder;
And 7), opening the first-stage feeding screw above the hopper of the replaced feeding machine to feed.
further, in the step 4), the sinter of the batch materials in the batch inlet is cleaned.
And furthermore, after the feeding port is cleaned, the feeding port is blocked by using a heat-insulating plug until the replaced feeding machine is moved to the working position.
Furthermore, the heat-insulating plug is made of a heat-insulating blanket.
further, after the step 7) is finished, the sleeve of the batch feeder and the batch feeding barrel brick after replacement are sealed by using heat insulation cotton.
Compared with the prior art, the invention has the following beneficial effects:
The invention discloses a method for replacing a batch feeder, which can not adjust the batch feed amount of the batch feeder which is not replaced during the replacement of the batch feeder, ensure the batch feed amount difference of each batch feeder after the batch feeder is replaced, stabilize the batch feed amount, gradually recover the height of a liquid level, ensure the stable convection in a tank furnace before and after the whole replacement, reduce the generation of stones and bubbles, and reduce the unstable convection of the tank furnace caused by the great adjustment of the batch feed amount by reducing the height of the liquid level by a small amount.
Detailed Description
The utility model mainly solves the problems of large temperature fluctuation of the tank furnace, unstable convection state of the tank furnace and insufficient point fluctuation of fusion caused in the process of replacing the batch feeder in the current production, effectively controls the replacement method, the process temperature and the parameters thereof in the replacement process of the batch feeder, reduces the influence of the replacement of the whole batch feeder on the process temperature and the quality, and the batch enters into the molten glass after sequentially passing through a large storage bin, a first-level batch feeding screw, a small storage bin, a discharging gate plate, the batch feeder and a batch inlet.
the patent mainly comprises the following points:
1. And (5) standard replacement of the batch feeder.
1.1, replacement standard of normal use of a batch feeder.
the batch feeder is replaced when the continuous use is accumulated for 10 months and/or the glass melting defect is abnormal and needs to be replaced.
And 1.2, replacing the feeder when the feeder is abnormal.
the operating current of the batch feeder is increased by 20 percent or more; the batch feeder moves by more than 10mm from the initial working position; the material discharge amount of the single-side feeder is lower than the normal 20kg after 2 hours due to the feeder; when the feeder breaks down.
If any one of the above conditions is met, the batch feeder is replaced.
2. A method and a flow for replacing a batch feeder.
2.1, the process control personnel change the furnace pressure from automatic control to manual control, and the control personnel control the furnace pressure within a normal control range according to the field condition.
2.2, after stopping the first-level feeding screw arranged between the small bin and the large bin, closing the blanking flashboard of the bin of the batch feeder to be replaced.
And 2.3, after confirming that no batch is required between the batch feeder bin to be replaced and the small bin connecting position, taking charge of a security personnel to remove the cylinder connection between the batch feeder to be replaced and the flashboard, disconnecting the batch feeder to be replaced from the upper bin, and removing the fixed connection between the batch feeder to be replaced and the steel structure.
And 2.4, the batch feeder to be replaced is timely stopped to operate after the batch feeder to be replaced is pulled out from the working position.
2.5, clear up the sinter of batch mixture to the dog-house, the in-process of clearance, will use the sight glass to observe the clearance situation of dog-house, ensure the dog-house clean up.
2.6, the dog-house clearance is accomplished the back, can not hinder the staff from the dog-house outdiffusion in order to guarantee high temperature to in order to keep the temperature in the stove stable, the stopper that in time made with the heat preservation blanket blocks up the dog-house, the condition of batch mixture in the batch feeder sleeve front end of inspection change, middle feed bin, the little feed bin, and the batch mixture is filled up to the batch feeder feed bin that will change.
and 2.7, taking off the stopper of the feeding port, slowly pushing the replaced feeding machine, confirming the height size of the replaced feeding machine and the brick of the feeding port, and pushing the replaced feeding machine after confirming to be normal and timely opening the replaced feeding machine.
And 2.8, opening a first-stage feeding screw above the replaced hopper of the batch feeder, simultaneously reducing the opening degree of the replaced batch feeder until the opening degree of the batch feeder before replacement is restored, and adjusting the opening degree of the replaced batch feeder according to the change of the liquid level appropriately at a later stage.
And 2.9, observing the blanking condition of the replaced batch feeder at the observation hole of the tank furnace, and sealing the position between the replaced batch feeder sleeve and the batch feeder sleeve brick by using heat insulation cotton after confirming that the blanking state is stable.
2.10, after the cleaning operation is finished and the feeding amount is stable, calculating the feeding amounts of the two feeding amounts, and ensuring that the difference value of the two feeding amounts is within 5 Kg.
3. Process and quality control during replacement of the batch feeder.
3.1, when the liquid level is reduced by less than 10mm during replacement, the process control is required in the process.
3.1.1, the opening of the unchanged batch feeder is not adjusted, the original opening is kept, and the batch feeding amount is not compensated and adjusted.
3.1.2, the heat loaded by the electrodes of the tank furnace is not adjusted.
3.1.3, controlling the change of the furnace pressure in the process, wherein the furnace pressure is controlled according to the normal standard.
3.1.4, controlling the temperature of the channel and the lead-out quantity according to normal requirements in the process.
3.2, when the liquid level is reduced by more than or equal to 10mm during the replacement, the process control is required in the process.
3.2.1, increasing the feeding amount of the non-replaced feeding machine and ensuring that the rising amplitude of the liquid level is less than 1mm/4 hours.
3.2.2, the heat loaded by the electrodes of the tank furnace is not adjusted.
3.2.3, controlling the change of the furnace pressure in the process, wherein the furnace pressure is controlled according to the normal standard.
3.2.4, controlling the temperature of the channel and the lead-out quantity according to normal requirements in the process.
4. And recovering and controlling the process after the replacement is finished.
4.1, recovering and stabilizing the furnace pressure in time.
And 4.2, monitoring the current of the feeder, the cooling return water temperature of the feeder and the feeding state in time after the newly replaced feeder is put into operation.
4.3, timely accounting the blanking amount of the 2 batch feeders, and ensuring that the blanking difference of the 2 batch feeders is less than 5kg/h by adjusting the proportional coefficient of the batch feeders.
and 4.4, after the descending amounts of the two batch feeders are ensured to be balanced, the liquid level is restored.
And 4.5, when the liquid level is recovered, the feeding amount of 2 feeding machines is synchronously increased to recover the liquid level height, and the recovery amplitude of the liquid level height is 1mm/4 h.
4.6, in the liquid level recovery and the later stabilization process, the heat loaded by the tank furnace is not adjusted.
and 4.7, controlling the temperature of the channel and the lead-out quantity according to normal requirements in the liquid level recovery and later-period stabilization processes.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (8)
1. A method for ensuring stable convection in a tank furnace by replacing batch feeders is characterized in that at least two batch feeders are arranged in the tank furnace;
Comprises the following steps;
Replacing a feeder to be replaced, and stopping the feeder to be replaced, wherein during replacement, the non-replaced feeder works normally and the opening degree is constant all the time;
Step two, after the replacement of the batch feeder to be replaced is completed, opening the replaced batch feeder to feed;
Step three, after the feeding amount is stable, comparing the feeding amounts of the replaced feeding machines with the feeding amounts of the non-replaced feeding machines to ensure that the feeding amount difference value of each feeding machine is within 5 Kg; and synchronously increasing the feeding amount of all the feeding machines, and recovering the liquid level height, wherein the recovery amplitude of the liquid level height is 0.5-1.5mm/4 h;
And step four, after the liquid level is restored to the required height, the feeding amount of all the feeding machines is restored to the normal working feeding amount.
2. A method for ensuring stable convection in a tank furnace through replacement of a batch feeder according to claim 1, wherein when the liquid level drops by more than or equal to 10mm during the replacement, the batch amount of the batch feeder which is not replaced is increased, and the rise amplitude of the liquid level is ensured to be more than 0mm/4 hours and less than 1mm/4 hours.
3. A method of ensuring stable convection in a batch furnace with a changed batch feeder according to claim 1, wherein the steps one to seven are repeated to change the batch feeder to be changed when the batch feeder is continuously used for more than 10 months normally, when a fusion defect is abnormal and needs to be changed, when the operating current of the batch feeder is increased by 20% or more, when the batch feeder moves by more than 10mm relative to the initial working displacement, when the blanking amount of the batch feeder on one side is lower than 20kg continuously for two hours due to the batch feeder, or when the batch feeder is in failure.
4. The method for ensuring stable convection in the tank furnace by replacing the batch feeder according to claim 1, wherein the batch materials sequentially pass through a large storage bin, a primary batch feeding screw, a small storage bin, a blanking flashboard, the batch feeder and a batch inlet and then enter molten glass;
the specific replacement method comprises the following steps;
step 1), after stopping a primary feeding screw arranged between a small bin and a large bin, closing a feeding gate of a bin of a feeding machine to be replaced;
Step 2), after confirming that no batch mixture exists between the batch feeder bin to be replaced and the small bin connecting part, splitting the batch feeder to be replaced and the small bin;
Step 3), moving out the batch feeder to be replaced from the working position, and stopping the operation of the batch feeder to be replaced;
Step 4), cleaning a feeding port;
Step 5), after the batch inlet is cleaned, filling the batch bin of the replaced batch feeder with batch;
step 6), moving the replaced batch feeder to a working position, connecting the replaced batch feeder with a small storage bin, and starting the replaced batch feeder;
And 7), opening the first-stage feeding screw above the hopper of the replaced feeding machine to feed.
5. a method for ensuring stable convection in a tank furnace through replacing a batch feeder according to claim 4, characterized in that in the step 4), sinter of the batch materials in the batch feeding port is cleaned.
6. A method of ensuring stable convection in a batch charger according to claim 5, wherein the batch charger is plugged with a heat retaining plug after the batch charger is cleaned and before the batch charger is moved to the working position.
7. The method for ensuring stable convection in the tank furnace through replacement of the batch feeder as claimed in claim 6, wherein the heat-insulating plug is made of a heat-insulating blanket.
8. A method for ensuring stable convection in a tank furnace through replacing a batch feeder according to claim 4, wherein after the step 7), the sleeve of the replaced batch feeder is sealed with the batch feeding barrel brick by using heat insulation cotton.
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| CN201910797393.6A CN110563311B (en) | 2019-08-27 | 2019-08-27 | Method for ensuring stable convection in tank furnace by replacing batch feeder |
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| CN201910797393.6A CN110563311B (en) | 2019-08-27 | 2019-08-27 | Method for ensuring stable convection in tank furnace by replacing batch feeder |
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| CN110563311B CN110563311B (en) | 2021-11-05 |
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Cited By (3)
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| CN112939419A (en) * | 2021-01-30 | 2021-06-11 | 凤阳凯盛硅材料有限公司 | Control system for improving blanking stability of kiln feeder |
| CN113816589A (en) * | 2021-08-24 | 2021-12-21 | 郑州旭飞光电科技有限公司 | Method for replacing feed inlet bricks without stopping machine |
| CN114230138A (en) * | 2022-01-06 | 2022-03-25 | 安徽汉柔光电科技有限公司 | Replacement method of tank furnace feeding equipment in ultrathin flexible glass production |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114230138A (en) * | 2022-01-06 | 2022-03-25 | 安徽汉柔光电科技有限公司 | Replacement method of tank furnace feeding equipment in ultrathin flexible glass production |
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| CN110563311B (en) | 2021-11-05 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20191213 Assignee: Hunan Shaohong special glass Co.,Ltd. Assignor: CAIHONG GROUP (SHAOYANG) SPECIAL GLASS Co.,Ltd. Contract record no.: X2023980041911 Denomination of invention: A Method of Replacing the Feeding Machine to Ensure Stable Convection in the Tank Furnace Granted publication date: 20211105 License type: Common License Record date: 20230915 |
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