CN114383655A - Monitoring method of electric furnace short net water cooling system - Google Patents
Monitoring method of electric furnace short net water cooling system Download PDFInfo
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- CN114383655A CN114383655A CN202111543977.4A CN202111543977A CN114383655A CN 114383655 A CN114383655 A CN 114383655A CN 202111543977 A CN202111543977 A CN 202111543977A CN 114383655 A CN114383655 A CN 114383655A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000001816 cooling Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000498 cooling water Substances 0.000 claims abstract description 79
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000784732 Lycaena phlaeas Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- General Physics & Mathematics (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a monitoring method of a short-net water cooling system of an electric furnace, which comprises the following steps: by additionally arranging the real-time monitoring of the flow of the cooling water, the monitoring of the temperature of the cooling water, the monitoring of the conductivity of the cooling water and the monitoring of the leakage current of the cooling water pipe in the short-network water cooling system, the invention realizes the effective monitoring of the short-network water cooling system of the electric furnace so as to ensure the safe operation of the short-network water cooling system and is beneficial to the economic operation of the electric furnace.
Description
Technical Field
The invention belongs to the technical field of electrical and automatic control design and installation, and particularly relates to a monitoring method of a short-net water cooling system of an electric furnace.
Background
Because the operating power of the electric furnace is relatively high, the working current of a short network bus (hereinafter referred to as a short network) between the transformer and the electrode of the electric furnace is generally more than 10000A. The short network for transmitting large current should be balanced at two contradictions of initial investment and energy consumption of the short network. ByDue to the characteristic of the skin effect of the high-current bus, when a short network is designed, the combination of a copper pipe and a water-cooling cable is preferably adopted, so that the consumption of nonferrous metals can be greatly reduced on the premise of meeting the requirement of high-current transmission. The outer diameter of the short net combined by the copper pipe and the water-cooling cable is limited by a plurality of factors, and the overlarge outer diameter not only causes overlarge initial investment, but also causes the impedance of the short net to be increased and the arrangement difficulty to be increased. Therefore, the current density of the short net of the combination of the common copper pipe and the water-cooled cable is controlled to be 5A/mm2And the measure of cooling by internally circulating cooling water is adopted.
The cooling water directly contacts with the inner wall of the short net, so that the risk of electric leakage and scaling can be brought while the operation temperature of the short net is reduced. When the temperature of the cooling water exceeds a certain range, the cooling effect is reduced after the inner wall of the copper pipe short net is scaled, and certain safety risk exists.
Disclosure of Invention
The invention aims to provide a monitoring method of a short-net water cooling system of an electric furnace, which can realize two functions:
the first function is: monitoring the temperature of the cooling water in real time, and reducing the temperature of the cooling water in a manner of modifying the flow during cooling; when the water temperature is too high, the scale formation of the inner wall of the short net is increased, the cooling effect is further reduced, and the economic operation of the electric furnace is not facilitated.
The second function is: monitoring the conductivity of the cooling water and the leakage current of the cooling water pipe in real time; when the conductivity is larger than a certain specific value, the leakage current of the short net passing through the cooling water exceeds a safe value, and is not beneficial to safe operation, and alarm information is sent; similarly, when the leakage current of the cooling water pipe exceeds a safety value, the safety operation is not facilitated, and alarm information is sent out.
The technical scheme adopted by the invention is as follows: a monitoring method of a short-net water cooling system of an electric furnace is shown in a block diagram in figure 1 and comprises the following steps:
s1, starting a circulating pump of the short-net water cooling system, and circulating cooling water in the short-net cooling water heat exchanger; after the circulating pump is started, the electric furnace short net water cooling system is started, and a monitoring and control mode is entered.
S2, cooling water flow monitoring and controlling: when the flow rate of the cooling water is lower than a preset value, sending out an 'insufficient flow alarm', and increasing the flow rate of the cooling water by 'increasing the flow rate'; when the flow rate of the cooling water is within the allowable range, the flow alarm is released, and the step S3 is entered.
S3, monitoring and controlling the temperature of cooling water: when the temperature of the cooling water is higher than a preset value, a water temperature overrun alarm is sent out, and the temperature of the cooling water is reduced by increasing the flow; when the temperature of the cooling water is in the allowable range, the 'water temperature overrun alarm' is released, and the process goes to the stage S4.
S4 Cooling Water conductivity monitoring: when the conductivity of the cooling water exceeds a limit value, sending out a conductivity overrun alarm; when the cooling water conductivity is within the allowable range, the S5 stage is entered.
S5, leakage monitoring of the cooling water pipe: when the leakage current of the cooling water pipe exceeds a certain value, a leakage over-limit alarm is sent out; and returning to the cooling water flow monitoring and controlling stage of S2 when the leakage current of the cooling water pipe is within the allowable range.
The invention has the beneficial effects that: the short-net water cooling system of the electric furnace is effectively monitored by additionally arranging the flow monitoring of real-time cooling water, the temperature monitoring of the cooling water, the conductivity monitoring of the cooling water and the leakage current monitoring of a cooling water pipe in the short-net water cooling system, so that the safe operation of the short-net water cooling system is ensured, and the economic operation of the electric furnace is facilitated.
Drawings
FIG. 1 is a block diagram of short net chilled water monitoring.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in FIG. 1, the monitoring method of the short net water cooling system of the electric furnace comprises S1, starting a circulating pump of the short net water cooling system, and starting cooling water to circulate in the short net-cooling water-heat exchanger; after the circulating pump is started, the electric furnace short net water cooling system is started, and a monitoring and control mode is entered. S2, cooling water flow monitoring and controlling: when the flow rate of the cooling water is lower than a preset value, sending out an 'insufficient flow alarm', and increasing the flow rate of the cooling water by 'increasing the flow rate'; when the flow rate of the cooling water is within the allowable range, the flow alarm is released, and the step S3 is entered. S3, monitoring and controlling the temperature of cooling water: when the temperature of the cooling water is higher than a preset value, a water temperature overrun alarm is sent out, and the temperature of the cooling water is reduced by increasing the flow; when the temperature of the cooling water is in the allowable range, the 'water temperature overrun alarm' is released, and the process goes to the stage S4. S4 Cooling Water conductivity monitoring: when the conductivity of the cooling water exceeds a limit value, sending out a conductivity overrun alarm; when the cooling water conductivity is within the allowable range, the S5 stage is entered. S5, leakage monitoring of the cooling water pipe: when the leakage current of the cooling water pipe exceeds a certain value, a leakage over-limit alarm is sent out; and returning to the cooling water flow monitoring and controlling stage of S2 when the leakage current of the cooling water pipe is within the allowable range.
In conclusion, the short-net water cooling system is additionally provided with real-time cooling water flow monitoring, cooling water temperature monitoring, cooling water conductivity monitoring and leakage current monitoring of a cooling water pipe, so that the electric furnace short-net water cooling system is effectively monitored, the safe operation of the short-net water cooling system is ensured, and the economic operation of the electric furnace is facilitated.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution methods fall within the scope of the present invention.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (5)
1. A monitoring method of a short-net water cooling system of an electric furnace is characterized in that: in the short network water cooling system, the flow monitoring of the cooling water, the temperature monitoring of the cooling water, the conductivity monitoring of the cooling water and the leakage current monitoring of the cooling water pipe are additionally arranged in real time.
2. The monitoring method of the electric furnace short net water cooling system according to claim 1, characterized in that the flow monitoring of the cooling water, the temperature monitoring of the cooling water, the conductivity monitoring of the cooling water and the leakage current monitoring of the cooling water pipe are sequentially executed to realize the monitoring of the electric furnace short net water cooling system.
3. The monitoring method of the electric furnace short net water cooling system according to claim 2, characterized by comprising the following steps:
s1, starting a circulating pump of the short-net water cooling system, and circulating cooling water in the short-net cooling water heat exchanger; after the circulating pump is started, starting the electric furnace short net water cooling system, and entering a monitoring and control mode;
s2, flow monitoring and control of cooling water: when the flow of the cooling water is lower than a preset value, sending out an alarm of insufficient flow; when the flow of the cooling water is within the allowable range, the flow alarm is released, and the step S3 is entered;
s3, temperature monitoring and control of cooling water: when the temperature of the cooling water is higher than a preset value, a water temperature overrun alarm is sent out; when the temperature of the cooling water is in the allowable range, the water temperature overrun alarm is released, and the step S4 is entered;
s4 conductivity monitoring of cooling water: when the conductivity of the cooling water exceeds a limit value, sending out a conductivity overrun alarm; when the cooling water conductivity is in the allowable range, entering the S5 stage;
s5, electric leakage monitoring of the cooling water pipe: when the leakage current of the cooling water pipe exceeds a limit value, an leakage overrun alarm is sent out; and returning to the cooling water flow monitoring and controlling stage of S2 when the leakage current of the cooling water pipe is within the allowable range.
4. The monitoring method of the water cooling system of the electric furnace short net according to claim 3, characterized in that the flow rate of the cooling water is increased by increasing the flow rate in S2.
5. The monitoring method of the water cooling system of the electric furnace short net according to the claim 3, characterized in that the temperature of the cooling water is reduced by increasing the flow rate in S3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111543977.4A CN114383655A (en) | 2021-12-16 | 2021-12-16 | Monitoring method of electric furnace short net water cooling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111543977.4A CN114383655A (en) | 2021-12-16 | 2021-12-16 | Monitoring method of electric furnace short net water cooling system |
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| CN114383655A true CN114383655A (en) | 2022-04-22 |
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| CN202111543977.4A Pending CN114383655A (en) | 2021-12-16 | 2021-12-16 | Monitoring method of electric furnace short net water cooling system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002313377A (en) * | 2001-04-12 | 2002-10-25 | Nissan Motor Co Ltd | Conductivity controlling device of fuel cell system |
| CN108549313A (en) * | 2018-04-19 | 2018-09-18 | 四川川润液压润滑设备有限公司 | The control method of static reactive water-cooling circulating system |
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2021
- 2021-12-16 CN CN202111543977.4A patent/CN114383655A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002313377A (en) * | 2001-04-12 | 2002-10-25 | Nissan Motor Co Ltd | Conductivity controlling device of fuel cell system |
| CN108549313A (en) * | 2018-04-19 | 2018-09-18 | 四川川润液压润滑设备有限公司 | The control method of static reactive water-cooling circulating system |
Non-Patent Citations (1)
| Title |
|---|
| 李万青;严增男;张鹏程;何永亮;刘新峰;: "中频炉冷却水的温度、压力监测方法分析", 铸造, no. 02 * |
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Application publication date: 20220422 |