CN210886205U - Energy-saving cathode cooling water utilization system for coated glass production line - Google Patents
Energy-saving cathode cooling water utilization system for coated glass production line Download PDFInfo
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- CN210886205U CN210886205U CN201921594155.7U CN201921594155U CN210886205U CN 210886205 U CN210886205 U CN 210886205U CN 201921594155 U CN201921594155 U CN 201921594155U CN 210886205 U CN210886205 U CN 210886205U
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- 239000000498 cooling water Substances 0.000 title claims abstract description 40
- 239000011521 glass Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 238000001816 cooling Methods 0.000 claims abstract description 48
- 238000000576 coating method Methods 0.000 claims abstract description 45
- 239000011248 coating agent Substances 0.000 claims abstract description 43
- 238000004140 cleaning Methods 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000009471 action Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims 2
- 230000008569 process Effects 0.000 abstract description 8
- 239000000758 substrate Substances 0.000 abstract description 7
- 238000001704 evaporation Methods 0.000 abstract description 6
- 230000008020 evaporation Effects 0.000 abstract description 6
- 239000005329 float glass Substances 0.000 abstract description 6
- 238000005406 washing Methods 0.000 abstract description 6
- 238000007747 plating Methods 0.000 description 5
- 238000005485 electric heating Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000013077 target material Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000001755 magnetron sputter deposition Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000005344 low-emissivity glass Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to an off-line coated glass production field discloses a coated glass production line cathode cooling water energy-saving utilization system, including water tank, negative pole, cooling system, circulating water pump and coating film cleaning system, parallelly connected being equipped with bypass pipeline on the pipeline between negative pole and the cooling system, carry out the heat exchange through the heat exchanger between bypass pipeline and the coating film washing water supply channel. The utility model discloses utilize the heat that produces in the cathode cooling process to be used for the washing of float glass substrate before the coating film when providing cooling environment for the negative pole, rational utilization energy, energy-concerving and environment-protective, be used for the washing of float glass substrate before the coating film with the heat that produces in the cathode cooling process simultaneously, can reduce the water demand through cooling tower vapor evaporation cooling consumption, water economy resource.
Description
Technical Field
The utility model relates to an off-line coated glass production field, in particular to a coated glass production line cathode cooling water energy-saving utilization system.
Background
Low-E glass is also called Low-emissivity glass, and is a film product formed by plating a plurality of layers of metal or other compounds on the surface of the glass. The coating layer has the characteristics of high visible light transmission and high mid-far infrared ray reflection, so that the coating layer has excellent heat insulation effect and good light transmission compared with common glass and traditional coating glass for buildings. The off-line Low-E coating is one of the production technologies of glass coating Low-E films and is suitable for coating large-area glass.
In the glass coating process, a cathode vacuum magnetron sputtering method is often adopted for coating, and one or more layers of metal or metal compound films are coated on the surface of high-quality float glass through magnetron sputtering. The sputtering process is established on the basis of gas discharge, discharge is started from low pressure, gas ions interact with a target material, the ions continuously impact the surface of the target, the target material is bombarded from the surface of the target, and then the target material is deposited on a substrate (glass) near the target and is condensed into a layer of film. Therefore, the method has the advantages of uniform film thickness, high film coating speed, low substrate temperature and the like. However, this method generates a lot of heat during the production process, and if cooling measures are not taken timely, the production equipment is seriously damaged, and the machine equipment is burnt. The key parts of the equipment that normally need to be cooled are: the cathode, the bottom plate baffle, the cathode power supply, the power supply cabinet, the vacuum pump and other heating devices. Therefore, a cooling system is needed in the coating process, heat generated by the equipment is eliminated, and a better water temperature is maintained, so that the failure rate of the product is avoided, and the service life of the equipment is shortened.
At present, more than 150 off-line coated glass production lines exist in China, the return water temperature of a coated cathode cooling water system is about 42 ℃, the water amount is 400 tons/h, and the temperature needs to be reduced through evaporation of a large amount of water vapor through a cooling tower, as shown in a process flow diagram of the cathode cooling water system in the prior art of figure 1, the water amount consumed by the evaporation of the water vapor for cooling is 50 tons every day, and meanwhile, a large amount of heat is consumed due to the evaporation of the water vapor for cooling.
And the float glass substrate for Low-E coating is cleaned before coating, in order to ensure the cleaning effect, the cleaning water is heated by electric heating, if 6 electric heating devices are installed, the power of each electric heating device is 9KW, the power of the installed electric heating is 6KW 9 KW-54 KW, the power consumption is 54KW 1296 degrees every day, the power consumption is 54KW 24 KW 300 degrees 388800 degrees every year, and the power consumption is 291.6 ten thousand degrees calculated according to 50 percent of open probability throughout the country. The amount of power consumed is very large.
Therefore, how to provide a better cooling environment for the cathode and reasonably utilize the heat and water generated by cathode cooling is one of the technical problems to be solved by those skilled in the art.
Disclosure of Invention
The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing a cathode cooling water energy-saving utilization system of a coated glass production line.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the energy-saving cathode cooling water utilization system for the coated glass production line comprises a water tank, a cathode, a cooling system and a circulating water pump, wherein the water tank, the cathode and the cooling system are connected through a cathode water supply pipeline to form a circulating loop;
the device also comprises a coating cleaning system, wherein the coating cleaning system is provided with a coating cleaning water supply pipeline;
the method is characterized in that:
and a bypass pipeline is connected in parallel on a pipeline between the cathode and the cooling system, and heat exchange is carried out between the bypass pipeline and the coating cleaning water supply pipeline through a heat exchanger.
The cathode cooling water energy-saving utilization system for the coated glass production line is characterized in that: the heat exchanger is a plate heat exchanger.
The cathode cooling water energy-saving utilization system for the coated glass production line is characterized in that: the heat exchange area of the plate heat exchanger is as follows:
F＝Wq/(K*ΔT)；
wherein F represents the heat exchange area in m2；
Wq represents the amount of heat exchange, in units W;
k represents the heat transfer coefficient in W/(m)2*℃)；
Δ T represents the mean logarithmic temperature difference in units of ℃.
The cathode cooling water energy-saving utilization system for the coated glass production line is characterized in that: still include PLC main control system, the cathode water supply pipe way, coating film wash the water supply pipe way and cooling system's condenser tube all is equipped with pressure sensors, temperature-sensing ware and electrical control valve on the way, utilizes pressure sensors and temperature-sensing ware convey the operation parameter signal of system PLC main control system, PLC main control system control the action of electrical control valve is opened and is stopped in order to reach the system operation and keep in required within range.
The cathode cooling water energy-saving utilization system for the coated glass production line is characterized in that: the cooling system comprises a heat exchange device, a cooling tower and a reservoir, wherein the heat exchange device, the cooling tower and the reservoir are connected through cooling water pipelines to form a circulation loop, and the cooling system further comprises a cooling water pump which is arranged on the circulation loop and provides power for the circulation loop.
The cathode cooling water energy-saving utilization system for the coated glass production line is characterized in that: the coating cleaning system comprises a coating cleaning machine and a cleaning water supply pump, wherein the coating cleaning machine and the cleaning water supply pump are connected in series with the heat exchanger through the coating cleaning water supply pipeline.
The utility model discloses following beneficial effect has:
1. the utility model discloses parallelly connected on the pipeline between negative pole and the cooling system and set up bypass pipeline, bypass pipeline and coating film wash and carry out the heat exchange through the heat exchanger between the water supply pipe, utilize the heat that produces in the negative pole cooling process to be used for float glass substrate washing before the coating film when providing cooling environment for the negative pole, rational utilization energy, energy-concerving and environment-protective.
2. The utility model discloses be used for the washing of float glass substrate before the coating film with the heat that produces among the cathode cooling process, can reduce the water demand that reduces the temperature through cooling tower vapor evaporation consumption, the water economy resource.
Drawings
FIG. 1 is a process flow diagram of a prior art cathode cooling water system;
FIG. 2 is a process flow diagram of a cathode cooling water system according to the present invention;
in the figure: 1. a water tank; 2. a cathode; 3. a cooling system; 31. a heat exchange device; 32. a cooling tower; 33. a reservoir; 34. a cooling water pump; 4. a water circulating pump; 5. a coating film cleaning system; 51. a coating cleaning machine; 52. cleaning the water supply pump; 6. a bypass line; 7. a heat exchanger.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
As shown in fig. 1 and 2, the energy-saving cathode cooling water utilization system for the coated glass production line comprises a water tank 1, a cathode 2 and a cooling system 3, wherein the water tank 1, the cathode 2 and the cooling system 3 are connected through a cathode water supply pipeline to form a circulation loop, and the energy-saving cathode cooling water utilization system further comprises a circulation water pump 4 which is arranged on the cathode water supply pipeline and provides power for the circulation loop.
This application cathode cooling water system still includes coating film cleaning system 5, and coating film cleaning system is equipped with the coating film and washs the water supply pipe way.
In this application, cooling system 3 includes heat transfer device 31, cooling tower 32 and cistern 33, and heat transfer device 31, cooling tower 32 and cistern 33 form the circulation circuit through the cooling water pipe connection, still including setting up the cooling water pump 34 that provides power for the circulation circuit on the circulation circuit.
In this application, the plating film cleaning system 5 includes a plating film cleaning machine 51 and a cleaning water supply pump 52, and the plating film cleaning machine 51 and the cleaning water supply pump 52 are connected in series with the heat exchanger 7 through a plating film cleaning water supply line.
In this application, parallelly connected being equipped with bypass line 6 on the pipeline between negative pole 2 and cooling system 3, carry out the heat exchange through heat exchanger 7 between bypass line 6 and the coating film washs the water supply pipe.
As shown in fig. 2, cooling water passes through the cathode 2 to cool the cathode 2, meanwhile, the temperature of the cooling water rises, water flowing out of the cathode 2 enters a section a of the pipeline, a part of water in the section a of the pipeline flows into a bypass pipeline 6 (a section b of the pipeline), and the water exchanges heat with water in a coating cleaning water supply pipeline through a heat exchanger 7 to be cooled and then flows into a section e of the pipeline through a section d of the pipeline; and the other part of the water in the section a of the pipeline flows into the section c of the pipeline and then flows into the section e of the pipeline, the water in the section e of the pipeline exchanges heat with the cooling water in the cooling system 3, enters the cathode 2 again through the circulating water pump 4 and the water tank 1, and cools the cathode 2, and the circulation is carried out.
Preferably, the heat exchanger 7 is a plate heat exchanger.
The heat exchange area of the plate heat exchanger is as follows:
F＝Wq/(K*ΔT)；
wherein F represents the heat exchange area in m2；
Wq represents the amount of heat exchange, in units W;
k represents the heat transfer coefficient in W/(m)2*℃)；
Δ T represents the mean logarithmic temperature difference in units of ℃.
As an example, the temperature of the water for heating the coating cleaning machine 51 is raised from 5 ℃ to 40 ℃, the water amount is 4 tons/h, and the energy required per hour is 140 kilocalories.
The cooling energy of cooling water of a coating production line is 400 tons/h, the water temperature is reduced to 40 ℃ from 42 ℃, the cooling energy required per hour is 800 kilocalories, and the requirement of heating cleaning water can be met. The water consumption for evaporation can be reduced by about 8.75 tons/day.
The heat exchange area calculation formula is as follows: f ═ Wq/(K Δ T)
The heat transfer coefficient (K) of the water is 6000W/(m)2*℃)
4.184KW 1K card
140K ka 4.184KW 585.76KW
ΔT≈(42-5+40-40)/2＝18.5
The result F ≈ 585.76/6/18.5 ≈ 5.28m2
Therefore, a plate heat exchanger with 6 square meters can be selected to achieve the purpose of energy-saving utilization of cathode cooling water.
This application cathode cooling water system still includes PLC main control system, the cathode water supply pipe, all be equipped with pressure sensors on the cooling water pipeline of coating film washing water supply pipe and cooling system 3, temperature-sensing ware and electrical control valve, utilize pressure sensors and temperature-sensing ware to convey PLC main control system with the operation parameter signal of system, PLC main control system controls electrical control valve's action and opens and stop in order to reach the system operation and keep in required within range.
And a PLC main control system is used for directly controlling the 3 paths of circulating water paths (cathode cooling water circulation, cooling system 3 water circulation and coating cleaning system 5 water circulation) to monitor water temperature setting, water flow, pressure state monitoring feedback and the like. And the PLC main control system achieves technical indexes of remotely monitoring water flow, water pressure, control temperature and the like of each circulating water channel according to the obtained signals.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The energy-saving cathode cooling water utilization system for the coated glass production line comprises a water tank (1), a cathode (2) and a cooling system (3), wherein the water tank (1), the cathode (2) and the cooling system (3) are connected through a cathode water supply pipeline to form a circulation loop, and the energy-saving cathode cooling water utilization system further comprises a circulation water pump (4) which is arranged on the cathode water supply pipeline and provides power for the circulation loop;
the device also comprises a coating cleaning system (5), wherein the coating cleaning system is provided with a coating cleaning water supply pipeline;
the method is characterized in that:
a bypass pipeline (6) is connected in parallel on a pipeline between the cathode (2) and the cooling system (3), and heat exchange is carried out between the bypass pipeline (6) and the coating cleaning water supply pipeline through a heat exchanger (7).
2. The energy-saving cathode cooling water utilization system for coated glass production lines as claimed in claim 1, wherein the system comprises: the heat exchanger (7) is a plate heat exchanger.
3. The energy-saving cathode cooling water utilization system for coated glass production lines as claimed in claim 2, wherein the system comprises: the heat exchange area of the plate heat exchanger is as follows:
F＝Wq/(K*ΔT)；
wherein F represents the heat exchange area in m2；
Wq represents the amount of heat exchange, in units W;
k represents the heat transfer coefficient in W/(m)2*℃)；
Δ T represents the mean logarithmic temperature difference in units of ℃.
4. The energy-saving cathode cooling water utilization system for coated glass production lines as claimed in claim 1, wherein the system comprises: still include PLC main control system, cathode water supply pipe, coating film wash water supply pipe and all be equipped with pressure sensors, temperature-sensing ware and electrical control valve on the condenser tube way of cooling system (3), utilize pressure sensors and temperature-sensing ware convey the operation parameter signal of system PLC main control system, PLC main control system control the action of electrical control valve is opened and is stopped in order to reach the system operation and keep in required within range.
5. The energy-saving cathode cooling water utilization system for coated glass production lines as claimed in claim 1, wherein the system comprises: the cooling system (3) comprises a heat exchange device (31), a cooling tower (32) and a water storage tank (33), wherein the heat exchange device (31), the cooling tower (32) and the water storage tank (33) are connected through a cooling water pipeline to form a circulation loop, and the cooling system further comprises a cooling water pump (34) which is arranged on the circulation loop and provides power for the circulation loop.
6. The energy-saving cathode cooling water utilization system for coated glass production lines as claimed in claim 1, wherein the system comprises: the coating cleaning system (5) comprises a coating cleaning machine (51) and a cleaning water supply pump (52), wherein the coating cleaning machine (51) and the cleaning water supply pump (52) are connected with the heat exchanger (7) in series through the coating cleaning water supply pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921594155.7U CN210886205U (en) | 2019-09-24 | 2019-09-24 | Energy-saving cathode cooling water utilization system for coated glass production line |
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| CN201921594155.7U CN210886205U (en) | 2019-09-24 | 2019-09-24 | Energy-saving cathode cooling water utilization system for coated glass production line |
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| CN210886205U true CN210886205U (en) | 2020-06-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629178A (en) * | 2019-09-24 | 2019-12-31 | 武汉长利新材料科技有限公司 | Energy-saving cathode cooling water utilization system for coated glass production line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629178A (en) * | 2019-09-24 | 2019-12-31 | 武汉长利新材料科技有限公司 | Energy-saving cathode cooling water utilization system for coated glass production line |
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