CN116119912B - Water-cooling annealing kiln and water-cooling annealing process - Google Patents
Water-cooling annealing kiln and water-cooling annealing process Download PDFInfo
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- CN116119912B CN116119912B CN202310109896.6A CN202310109896A CN116119912B CN 116119912 B CN116119912 B CN 116119912B CN 202310109896 A CN202310109896 A CN 202310109896A CN 116119912 B CN116119912 B CN 116119912B
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- 238000000137 annealing Methods 0.000 title claims abstract description 258
- 238000001816 cooling Methods 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000008569 process Effects 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 157
- 239000011521 glass Substances 0.000 claims abstract description 89
- 239000000498 cooling water Substances 0.000 claims abstract description 23
- 230000005855 radiation Effects 0.000 claims abstract description 10
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims 1
- 238000012546 transfer Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Control Of Heat Treatment Processes (AREA)
Abstract
The invention discloses a water-cooling annealing kiln and a water-cooling annealing process, comprising the following steps: the annealing kiln comprises an annealing kiln body, a plurality of thermocouples, a plurality of temperature compensation devices and a water cooling device; the thermocouples are fixedly arranged at the top of the annealing kiln body and can measure the heat in the annealing kiln body; the temperature compensation devices are fixedly arranged at the upper part and the lower part of the two sides of the annealing furnace body and can heat the glass plate in the annealing furnace body; the two sets of water cooling devices are respectively and fixedly arranged at the upper part and the lower part of the annealing kiln body, and cooling water circulates in the water cooling devices to cool the glass plates in an indirect radiation heat exchange mode between the cooling water and the glass plates; and controlling a plurality of temperature compensation devices and the water cooling device in real time according to feedback of the temperature measurement of the thermocouples, and adjusting the cooling intensity of the glass plate. The water-cooling annealing kiln disclosed by the invention can cool down the glass plate.
Description
Technical Field
The invention relates to the technical field of glass, in particular to a water-cooling annealing kiln and a water-cooling annealing process.
Background
The main cooling mode of the glass in the annealing kiln is air cooling, namely normal-temperature air in a workshop is introduced or blown into an annealing kiln air system by the power of a fan, the glass is cooled by heat radiation and heat convection, and then hot air in the air system is discharged outdoors. The number of fans of one annealing kiln is more than 10, and the fans are generally arranged above the kiln body and connected with the air pipes in the kiln through transition air pipes at the top of the kiln. The kiln body heat radiation is larger, the working condition environment of the fan is bad, the running noise and vibration are large, and the fan bearing and the belt are easy to damage. The fan needs to operate uninterruptedly in a kiln period of 8-10 years, and the energy consumption and the noise are large.
In the prior art, the utility model patent with the patent publication number of CN208980581U is an annealing cooling device for glass bottles, which comprises a fixing frame, the top of the fixing frame is connected with an annealing furnace, a control switch is arranged at the position, close to the upper position of a feeding conveyor belt, of one side wall of the annealing furnace, a glass cover is arranged on the front side wall of the annealing furnace, a first annealing area and a second annealing area are sequentially arranged at one side, close to a feeding port, of the inner part of the annealing furnace, and the space occupied by the first annealing area and the second annealing area are identical in size. According to the utility model, the heat recovery mechanism is arranged, so that the heat emitted by the glass bottle is conveniently recovered, the effective utilization of resources is realized, the cooling box is arranged, the circulating water coil pipes are arranged on the two inner side walls of the cooling box, so that water flows in the circulating water coil pipes, the heat emitted by the glass bottle in the cooling box is carried away in the flowing process, the whole cooling process can not influence the glass bottle, and the annealing cooling efficiency of the glass bottle is improved. In the prior art, a cooling mode of the glass bottle in the annealing furnace is still air-cooled, and the glass bottle is discharged from the annealing furnace and then enters a cooling box for heat dissipation.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the problems of severe working condition environment, high energy consumption and high noise of air cooling are solved.
In order to solve the technical problems, the invention provides the following technical scheme:
A water-cooled annealing lehr comprising: the annealing kiln comprises an annealing kiln body, a plurality of thermocouples, a plurality of temperature compensation devices and a water cooling device; the thermocouples are fixedly arranged at the top of the annealing kiln body and can measure the heat in the annealing kiln body; the temperature compensation devices are fixedly arranged at the upper part and the lower part of the two sides of the annealing furnace body and can heat the glass plate in the annealing furnace body; the two sets of water cooling devices are respectively and fixedly arranged at the upper part and the lower part of the annealing kiln body, and cooling water circulates in the water cooling devices to cool the glass plates in an indirect radiation heat exchange mode between the cooling water and the glass plates; and controlling a plurality of temperature compensation devices and the water cooling device in real time according to feedback of the temperature measurement of the thermocouples, and adjusting the cooling intensity of the glass plate.
The advantages are that: the air cooling mode is changed into a water cooling mode, the water cooling device is fixedly arranged in the annealing kiln body, and the glass plate is cooled by the indirect radiation heat exchange mode between the cooling water and the glass plate. The water cooling noise is smaller than the air cooling noise, the heat radiation in the kiln body is low, the water cooling device circulates cooling water, and the energy consumption is smaller.
In one embodiment of the invention, two water cooling devices are transversely arranged through the annealing furnace body and are respectively arranged at the upper part and the lower part of the annealing furnace body in parallel to the advancing direction of the glass plate; each water cooling device comprises a water inlet main pipe and a water outlet main pipe; the cooling water enters and exits from the left side in the water inlet main pipe, and enters and exits from the left side in the water outlet main pipe.
In an embodiment of the present invention, each water cooling device further includes a plurality of water inlet branch pipes and a plurality of water outlet branch pipes, wherein the plurality of water inlet branch pipes are connected with the water inlet main pipe, and the plurality of water outlet branch pipes are connected with the water outlet main pipe; and the water cooling device positioned at the upper part of the annealing kiln body and the water cooling device positioned at the lower part of the annealing kiln body are symmetrically arranged.
In an embodiment of the invention, the water inlet branch pipes and the water outlet branch pipes are perpendicular to the central lines of the glass plate and the annealing furnace body, and the water inlet branch pipes and the water outlet branch pipes are equidistantly staggered along the advancing direction of the glass plate.
In an embodiment of the invention, each water cooling device further comprises a plurality of regulating valves, and the regulating valves are respectively connected with the water inlet main pipe and the water inlet branch pipes and can regulate the water inlet and outlet flow of the cooling water.
In one embodiment of the invention, a plurality of annealing areas are arranged in the annealing furnace body, including a first annealing area, a second annealing area, a third annealing area, a fourth annealing area, a fifth annealing area, a sixth annealing area and a seventh annealing area, and the glass plate flows out of the annealing furnace body after sequentially flowing from the first annealing area to the seventh annealing area in the annealing furnace body; the annealing temperature of each annealing zone is different, the annealing temperature of the first annealing zone is 600-540 ℃, the annealing temperature of the second annealing zone is 540-470 ℃, the annealing temperature of the third annealing zone is 470-370 ℃, the annealing temperature of the fourth annealing zone is 370-350 ℃, the annealing temperature of the fifth annealing zone is 350-230 ℃, the annealing temperature of the sixth annealing zone is 230-220 ℃ and the annealing temperature of the seventh annealing zone is 230-70 ℃.
In an embodiment of the present invention, a plurality of the temperature compensation devices and the water cooling devices are disposed in the first annealing zone, the second annealing zone, the third annealing zone, the fifth annealing zone and the seventh annealing zone, and an annealing mode of the fourth annealing zone and the sixth annealing zone is natural cooling.
In an embodiment of the present invention, according to the difference of annealing temperatures of each annealing zone, the pipe diameters of the water inlet header pipe, the water outlet header pipe, the plurality of water inlet branch pipes and the plurality of water outlet branch pipes in the second annealing zone are used as references, the pipe diameter in the first annealing zone is 1.5 times of the pipe diameter in the second annealing zone, the pipe diameter in the third annealing zone is 2.5 times of the pipe diameter in the second annealing zone, the pipe diameter in the fifth annealing zone is 3 times of the pipe diameter in the second annealing zone, and the pipe diameter in the seventh annealing zone is 3.5 times of the pipe diameter in the second annealing zone.
In one embodiment of the invention, the two ends of the water inlet main pipe and the water outlet main pipe are connected with a common circulating water system in the glass factory, so that water can be recycled.
The invention also provides a water-cooling annealing kiln and a water-cooling annealing process, comprising the following steps: the glass plate flows into the annealing kiln body from the inlet of the annealing kiln body, the upper surface and the lower surface of the glass plate are cooled respectively through two sets of water cooling devices in an indirect radiation heat exchange mode between cooling water and the glass plate, a plurality of temperature compensation devices and the water cooling devices are controlled in real time according to temperature measurement feedback of a plurality of thermocouples, the cooling intensity of the glass plate is regulated, the stress in the glass plate is eliminated when the glass plate is cooled, and finally the glass plate flows out from the outlet of the annealing kiln body to the next procedure.
Compared with the prior art, the invention has the beneficial effects that: the plurality of temperature compensation devices are matched with the water cooling device to carry out compensation heating on the glass plate, so that the glass plate is cooled in a controlled manner, and the glass plate is prevented from cracking. The cooling water enters and exits from left to right in the water inlet manifold, the transverse temperature difference in the width direction of the glass plate is eliminated to the greatest extent, the transverse temperature distribution tends to be consistent, the water inlet branch pipes and the water outlet branch pipes are perpendicular to the central lines of the glass plate and the annealing kiln body, and the water inlet branch pipes and the water outlet branch pipes are equidistantly and alternately arranged along the advancing direction of the glass plate, so that the uniformity and stability of the cooling strength of the glass plate in the width direction are ensured, and the quality of the glass plate is improved. And according to the temperature measurement feedback of a plurality of thermocouples, a plurality of temperature compensation devices and water cooling devices are controlled in real time, the opening degree of a plurality of regulating valves is regulated, the flow of cooling water in and out of a water pipe is regulated, the cooling strength of a glass plate is regulated, the residual stress is eliminated or reduced to the greatest extent, and the purpose of good annealing is achieved. The two ends of the water inlet main pipe and the water outlet main pipe are connected with a public circulating water system in the glass factory, so that water can be recycled, and the cooling water is recycled due to the fact that the public circulating water system is also provided with a water inlet pipe and a water return pipe, so that resources are saved, and meanwhile, the cost is reduced.
The annealing kiln adopts water to replace air to cool glass, the specific heat capacity of the water is 3 times that of the air, and the reasonable design and arrangement of the pipe diameter and distribution of the water pipe can realize better annealing effect by utilizing the advantage that the heat exchange efficiency of the water is far greater than that of the air. The water-cooling annealing process has simple structure, reduces the cost, saves energy and reduces consumption.
Drawings
FIG. 1 is a schematic view of a water-cooled annealing furnace according to the present invention.
FIG. 2 is a schematic cross-sectional view at A-A of the present invention.
FIG. 3 is a schematic view of a plurality of annealing zones according to the present invention.
Detailed Description
In order to facilitate the understanding of the technical scheme of the present invention by those skilled in the art, the technical scheme of the present invention will be further described with reference to the accompanying drawings.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1 and 2, the present invention provides a water-cooled annealing furnace, comprising: an annealing furnace body 100, a plurality of thermocouples 200, a plurality of temperature compensating devices 300, and a water cooling device 400. The plurality of thermocouples 300 are fixedly arranged at the top of the annealing furnace body 100, heat inside the annealing furnace body 100 can be measured, the plurality of temperature compensation devices 300 are fixedly arranged at the upper part and the lower part of two sides of the annealing furnace body 100, the glass plate 500 can be heated in the annealing furnace body 100, the two sets of water cooling devices 400 are respectively fixedly arranged at the upper part and the lower part of the annealing furnace body 100, cooling water is circulated inside the water cooling devices 400, the glass plate 500 is cooled in an indirect radiation heat exchange mode between the cooling water and the glass plate 500, and the plurality of temperature compensation devices 300 and the water cooling devices 400 are controlled in real time according to feedback of temperature measurement of the plurality of thermocouples 200, so that the cooling strength of the glass plate 500 is adjusted.
Referring to fig. 1 and 3, in one embodiment of the present invention, a transfer roller 101 is disposed in an annealing lehr body 100, the transfer roller 101 penetrates the entire annealing lehr body 100, a glass sheet 500 is placed on the transfer roller 101, and the glass sheet 500 is flowed to each annealing zone by the transfer roller 101. The annealing lehr body 100 includes a plurality of annealing lehr sections, each of which has an annealing zone disposed therein, that is, the annealing lehr body 100 has a plurality of annealing zones disposed therein, including a first annealing zone 110, a second annealing zone 120, a third annealing zone 130, a fourth annealing zone 140, a fifth annealing zone 150, a sixth annealing zone 160, and a seventh annealing zone 170, and the glass sheet 500 flows out of the annealing lehr body 100 after sequentially flowing from the first annealing zone 110 to the seventh annealing zone 170 in the annealing lehr body 100. The annealing temperatures of the annealing zones are different, the annealing temperature of the first annealing zone 110 is 600-540 ℃, the annealing temperature of the second annealing zone 120 is 540-470 ℃, the annealing temperature of the third annealing zone 130 is 470-370 ℃, the annealing temperature of the fourth annealing zone 140 is 370-350 ℃, the annealing temperature of the fifth annealing zone 150 is 350-230 ℃, the annealing temperature of the sixth annealing zone 160 is 230-220 ℃ and the annealing temperature of the seventh annealing zone 170 is 230-70 ℃. A plurality of temperature compensation devices 300 and water cooling devices 400 are disposed in the first annealing zone 110, the second annealing zone 120, the third annealing zone 130, the fifth annealing zone 150 and the seventh annealing zone 170, and the annealing mode is water cooling. The fourth and sixth annealing regions 140 and 150 are annealed in a natural cooling manner. And the fourth and sixth annealing zones 140 and 150 are 1 to 2 meters in length, the other annealing zones are each 9 meters or more and 9 meters or more in length, and the glass sheet 500 is 4 to 5.4 meters in width.
Referring to fig. 1 and 2, in an embodiment of the present invention, a plurality of temperature compensating devices 300 and water cooling devices 400 are provided at upper and lower portions of each of the annealing leys of each of the annealing zones except the fourth annealing zone 140 and the sixth annealing zone 150. Specifically, a plurality of temperature compensating devices 300 are respectively provided at the upper and lower portions of both sides of each of the annealing leys, and can heat the glass sheet in each of the annealing leys. Because the glass plate 500 is heated, the temperature in the annealing furnace body 100 is reduced from 600 ℃ to 70 ℃ and then the cooling is performed by the water cooling device 400, the cooling is not performed too fast, and the glass plate 500 is prevented from being easily cracked due to the too fast cooling, so that the glass plate 500 is compensated and heated by the plurality of temperature compensation devices 300, namely, the glass plate 500 is cooled in a controlled manner. Specifically, the temperature compensation device 300 is an electric heater.
Referring to fig. 1 and 2, in an embodiment of the present invention, two water cooling devices 400 are transversely disposed through the lehr body 100 and are disposed at upper and lower portions of the lehr body 100, respectively, in parallel with the advancing direction of the glass sheet 500. Each water cooling device 400 comprises a water inlet manifold 410 and a water outlet manifold 420, and is arranged in a staggered manner, and the cooling water enters and exits from the left side and the right side in the water inlet manifold 410 and enters and exits from the right side and the left side in the water outlet manifold 420, so as to eliminate the transverse temperature difference in the width direction of the glass plate 500 to the greatest extent, and make the transverse temperature distribution tend to be consistent. Each water cooling device 400 further includes a plurality of water inlet branch pipes 430 and a plurality of water outlet branch pipes 440, wherein the plurality of water inlet branch pipes 430 are connected to the water inlet manifold 410, and the plurality of water outlet branch pipes 440 are connected to the water outlet manifold 420. The water cooling device 400 positioned at the upper part of the annealing furnace body 100 and the water cooling device 400 positioned at the lower part of the annealing furnace body 100 are symmetrically arranged. The plurality of water inlet branch pipes 430 and the plurality of water outlet branch pipes 440 are perpendicular to the center line 102 of the glass plate 500 and the annealing furnace body 100, and the plurality of water inlet branch pipes 430 and the plurality of water outlet branch pipes 440 are equidistantly staggered along the advancing direction of the glass plate 500, so that the uniformity and stability of the cooling strength of the glass plate 500 in the width direction are ensured. Each water cooling device 400 further comprises a plurality of regulating valves 450, and the regulating valves 450 are respectively connected with the water inlet header pipe 410 and the water inlet branch pipes 430, so that the water inlet and outlet flow rate of the cooling water can be regulated. The two ends of the water inlet header pipe 410 and the water outlet header pipe 420 are connected with a common circulating water system (not labeled in the figure) in the glass factory, so that water can be recycled, and the common circulating water system also has a water inlet pipe and a water return pipe, so that cooling water is recycled, resources are saved, and meanwhile, the cost is reduced.
Referring to fig. 1 and 2, in an embodiment of the present invention, the cooling rate in each annealing zone is different according to the annealing temperature of each annealing zone, because the annealing temperature in the second annealing zone 120 is 540-470 ℃, 540 ℃ is the annealing upper line of the glass plate 500, 470 ℃ is the annealing lower line of the glass plate 500, and in this temperature range, the stress of the glass plate 500, 95% can be eliminated. Therefore, the pipe diameter of the water inlet pipe 410, the water outlet pipe 420, the water inlet pipes 430 and the water outlet pipes 440 in the second annealing zone 120 is 1.5 times of the pipe diameter of the second annealing zone 120, the pipe diameter of the third annealing zone 130 is 2.5 times of the pipe diameter of the second annealing zone 120, the pipe diameter of the fifth annealing zone 150 is 3 times of the pipe diameter of the second annealing zone 120, and the pipe diameter of the seventh annealing zone 170 is 3.5 times of the pipe diameter of the second annealing zone. Specifically, the pipe diameters of the water inlet pipe 410, the water outlet pipe 420, the water inlet pipes 430 and the water outlet pipes 440 in the first annealing zone 110 correspond to 1.5 times the pipe diameters of the water inlet pipe 410, the water outlet pipe 420, the water inlet pipes 430 and the water outlet pipes 440 in the second annealing zone 120, the third annealing zone 130, the fifth annealing zone 150 and the seventh annealing zone 170, and so on.
Referring to fig. 1 to 3, the present invention further provides a water cooling annealing process of a water cooling annealing furnace, wherein a glass plate 500 flows into the furnace body 100 from an inlet of the furnace body 100, the upper surface and the lower surface of the glass plate 500 are cooled by two sets of water cooling devices 400 through indirect radiant heat exchange between the cooling water and the glass plate 500, and the temperature compensation devices 300 and the water cooling devices 400 are controlled in real time according to temperature measurement feedback of the thermocouples 200, so as to adjust cooling strength of the glass plate 500, cool down the glass plate 500 while eliminating stress in the glass plate 500, and finally flow out from an outlet of the furnace body 100 to the next process.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
The above-described embodiments merely represent embodiments of the invention, the scope of the invention is not limited to the above-described embodiments, and it is obvious to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (6)
1. A water-cooled annealing lehr, comprising: the annealing kiln comprises an annealing kiln body, a plurality of thermocouples, a plurality of temperature compensation devices and a water cooling device; the thermocouples are fixedly arranged at the top of the annealing kiln body and can measure the heat in the annealing kiln body; the temperature compensation devices are fixedly arranged at the upper part and the lower part of the two sides of the annealing furnace body and can heat the glass plate in the annealing furnace body; the two sets of water cooling devices are respectively and fixedly arranged at the upper part and the lower part of the annealing kiln body, and cooling water circulates in the water cooling devices to cool the glass plates in an indirect radiation heat exchange mode between the cooling water and the glass plates; according to feedback of the temperature measurement of the thermocouples, controlling the temperature compensation devices and the water cooling devices in real time, and adjusting the cooling intensity of the glass plate;
The two water cooling devices transversely penetrate through the annealing furnace body and are respectively arranged at the upper part and the lower part of the annealing furnace body in parallel to the advancing direction of the glass plate; each water cooling device comprises a water inlet main pipe and a water outlet main pipe; the cooling water enters and exits from the left side in the water inlet main pipe, and enters and exits from the left side in the water outlet main pipe;
Each water cooling device further comprises a plurality of water inlet branch pipes and a plurality of water outlet branch pipes, wherein the water inlet branch pipes are connected with the water inlet main pipe, and the water outlet branch pipes are connected with the water outlet main pipe; the water cooling device positioned at the upper part of the annealing kiln body and the water cooling device positioned at the lower part of the annealing kiln body are symmetrically arranged;
The water inlet branch pipes and the water outlet branch pipes are perpendicular to the central lines of the glass plate and the annealing kiln body, and are equidistantly staggered along the advancing direction of the glass plate;
A plurality of annealing areas are arranged in the annealing furnace body, each annealing area comprises a first annealing area, a second annealing area, a third annealing area, a fourth annealing area, a fifth annealing area, a sixth annealing area and a seventh annealing area, and the glass plate flows from the first annealing area to the seventh annealing area in sequence in the annealing furnace body and then flows out of the annealing furnace body;
According to the annealing temperature difference of each annealing zone, the pipe diameters of the water inlet main pipe, the water outlet main pipe, the water inlet branch pipes and the water outlet branch pipes in the second annealing zone are taken as references, the pipe diameter of the first annealing zone is 1.5 times of the pipe diameter in the second annealing zone, the pipe diameter of the third annealing zone is 2.5 times of the pipe diameter in the second annealing zone, the pipe diameter of the fifth annealing zone is 3 times of the pipe diameter in the second annealing zone, and the pipe diameter of the seventh annealing zone is 3.5 times of the pipe diameter in the second annealing zone.
2. The water-cooled annealing furnace of claim 1, wherein each water-cooling device further comprises a plurality of regulating valves, and the regulating valves are respectively connected with the water inlet main pipe and the water inlet branch pipes and can regulate the water inlet and outlet flow of the cooling water.
3. The water-cooled annealing lehr of claim 1 wherein the annealing temperatures of each of the annealing zones are different, the annealing temperature of the first annealing zone is 600 ℃ to 540 ℃, the annealing temperature of the second annealing zone is 540 ℃ to 470 ℃, the annealing temperature of the third annealing zone is 470 ℃ to 370 ℃, the annealing temperature of the fourth annealing zone is 370 ℃ to 350 ℃, the annealing temperature of the fifth annealing zone is 350 ℃ to 230 ℃, the annealing temperature of the sixth annealing zone is 230 ℃ to 220 ℃ and the annealing temperature of the seventh annealing zone is 230 ℃ to 70 ℃.
4. The water-cooled annealing furnace according to claim 3, wherein a plurality of said temperature compensating means and said water cooling means are provided in each of said first annealing zone, said second annealing zone, said third annealing zone, said fifth annealing zone and said seventh annealing zone, and said fourth annealing zone and said sixth annealing zone are naturally cooled.
5. The water-cooled annealing lehr of claim 1 wherein the water inlet header and the water outlet header are connected at both ends to a common circulating water system within the glass plant for recycling water.
6. A water-cooling annealing process based on the water-cooling annealing furnace according to any one of claims 1 to 5, comprising: the glass plate flows into the annealing kiln body from the inlet of the annealing kiln body, the upper surface and the lower surface of the glass plate are cooled respectively through two sets of water cooling devices in an indirect radiation heat exchange mode between cooling water and the glass plate, a plurality of temperature compensation devices and the water cooling devices are controlled in real time according to temperature measurement feedback of a plurality of thermocouples, the cooling intensity of the glass plate is regulated, the stress in the glass plate is eliminated when the glass plate is cooled, and finally the glass plate flows out from the outlet of the annealing kiln body to the next procedure.
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| CN202310109896.6A CN116119912B (en) | 2023-01-31 | 2023-01-31 | Water-cooling annealing kiln and water-cooling annealing process |
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|---|---|
| CN116119912A (en) | 2023-05-16 |
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