CN114226673A - Temperature control method of cooling water of continuous casting crystallizer, storage medium and electronic terminal - Google Patents
Temperature control method of cooling water of continuous casting crystallizer, storage medium and electronic terminal Download PDFInfo
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- CN114226673A CN114226673A CN202111389038.9A CN202111389038A CN114226673A CN 114226673 A CN114226673 A CN 114226673A CN 202111389038 A CN202111389038 A CN 202111389038A CN 114226673 A CN114226673 A CN 114226673A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
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- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
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Abstract
The invention discloses a temperature control method, a storage medium and an electronic terminal for cooling water of a continuous casting crystallizer, wherein the temperature control method comprises the steps of acquiring the outlet water temperature of a cooling water treatment device in real time; acquiring the water inlet temperature of the crystallizer in real time; pre-adjusting the water outlet temperature, and adjusting the water outlet temperature of the cooling water treatment device to the pre-adjusted water outlet temperature which is the target water inlet temperature of the crystallizer; acquiring the inlet water temperature before correction, wherein when the outlet water temperature of the cooling water treatment device is the target inlet water temperature, the inlet water temperature of the crystallizer is the inlet water temperature before correction; and correcting the water inlet temperature, and adjusting the water outlet temperature of the cooling water treatment device to the corrected water outlet temperature according to the temperature difference between the preset water outlet temperature and the water inlet temperature before correction, so that the water inlet temperature of the crystallizer is close to or equal to the target water inlet temperature. The invention can more accurately control the water inlet temperature of the crystallizer, reduces the influence of factors such as environmental temperature on the water inlet temperature, and is beneficial to avoiding the influence on the casting blank quality caused by the unstable temperature of the cooling water.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a temperature control method for cooling water of a medium-continuous casting crystallizer.
Background
Continuous casting is an important part in steel production, high-temperature molten steel is forced to cool in a crystallizer to form a blank shell with a certain thickness in the main process, and the inside of the blank shell is still liquid molten steel. And after the casting blank containing the liquid core from the crystallizer enters a secondary cooling zone, continuously cooling and reducing the temperature under the strong cooling of a water nozzle or a steam-water atomizing nozzle until the molten steel in the casting blank is completely solidified.
In the production of a continuous casting machine, a crystallizer is one of the most critical devices, and a cooling water control system of the crystallizer is one of the important factors for the efficient and stable production of the continuous casting machine. The improper cooling strength of the cooling water of the crystallizer can influence the surface quality of a casting blank and even induce the vicious accident of steel leakage, so that the accurate control of the water inlet temperature of the continuous casting crystallizer is realized, and the key for improving the quality of the casting blank and the casting efficiency is realized.
Fig. 1 shows a flow chart of the cooling water control of the existing crystallizer. The casting blank is cooled by crystallizer cooling water after flowing through a crystallizer 100, heated return water flows back to a cooling water treatment device 200 for cooling, and fresh water reaching the standard after cooling enters the crystallizer again for work, wherein a temperature sensor is installed on a return water pipeline and used for measuring the water inlet temperature of the crystallizer, but actually, a temperature sensor T is used, the water inlet temperature obtained by the temperature sensor is different from the actual water inlet temperature of the crystallizer, fig. 2 is a diagram of the variation trend of the water inlet temperature of the crystallizer within 30 minutes in a certain steel enterprise, the highest temperature can be seen to be 31.34 ℃, the lowest temperature is 27.00 ℃, the temperature deviation is 4.34 ℃, and the control precision is poor.
The shifting of the inlet water temperature is caused by a plurality of reasons, one of which is that the pipeline between the cooling water treatment device and the crystallizer is long, and under the influence of extremely cold weather or hot weather, the outlet water temperature of the cooling water treatment device and the inlet water temperature of the crystallizer have large temperature difference.
Disclosure of Invention
The invention mainly aims to provide a temperature control method for cooling water of a continuous casting crystallizer, which is used for more accurately controlling the water inlet temperature of the cooling water of the crystallizer and reducing the influence of factors such as environmental temperature on the water inlet temperature, thereby avoiding the influence on the casting blank quality due to the instability of the cooling water temperature.
In order to achieve the above objects and other related objects, the technical solution of the present invention is as follows:
a temperature control method for cooling water of a continuous casting crystallizer, wherein a cooling water circulation pipeline is arranged between the crystallizer and a cooling water treatment device, and the temperature control method comprises the following steps:
acquiring the outlet water temperature of the cooling water treatment device in real time;
acquiring the water inlet temperature of the crystallizer in real time;
pre-adjusting the water outlet temperature, and adjusting the water outlet temperature of the cooling water treatment device to the pre-adjusted water outlet temperature, wherein the pre-adjusted water outlet temperature is the target water inlet temperature of the crystallizer;
acquiring the inlet water temperature before correction, wherein when the outlet water temperature of the cooling water treatment device is the target inlet water temperature, the inlet water temperature of the crystallizer is the inlet water temperature before correction;
and correcting the water inlet temperature, and adjusting the water outlet temperature of the cooling water treatment device to the corrected water outlet temperature according to the temperature difference between the preset water outlet temperature and the water inlet temperature before correction, so that the water inlet temperature of the crystallizer is close to or equal to the target water inlet temperature.
Optionally, the method for correcting the inlet water temperature includes:
calculating a compensation temperature, wherein the compensation temperature is equal to the temperature difference between the preset outlet water temperature and the inlet water temperature before correction;
calculating the corrected outlet water temperature, wherein the corrected outlet water temperature is equal to the sum of the preset outlet water temperature and the compensation temperature; and
and controlling the cooling water treatment device to adjust the water outlet temperature to the corrected water outlet temperature.
Optionally, the temperature control method further includes acquiring a return water temperature of the cooling water treatment device in real time;
and when the cooling water treatment device is controlled to adjust the water outlet temperature to the corrected water outlet temperature, the cooling water treatment device is controlled according to the return water temperature and the water outlet temperature of the cooling water treatment device.
Optionally, the temperature control method further includes checking the current water inlet temperature after correcting the water inlet temperature:
presetting a target water inlet temperature range according to the target water inlet temperature;
acquiring the current water inlet temperature;
and judging whether the current water inlet temperature is within the water inlet temperature range, if so, finishing temperature adjustment, and if not, performing deep correction until the current water inlet temperature is within the water inlet temperature range.
Optionally, the method for performing the depth correction includes:
presetting a depth correction adjustment temperature difference;
acquiring the current effluent temperature of the cooling water treatment device;
and controlling the cooling water treatment device to adjust the outlet water temperature by the depth correction adjusting temperature difference.
Optionally, the method for controlling the cooling water treatment device to adjust the outlet water temperature by the depth correction adjustment temperature difference includes:
comparing the current water outlet temperature with the target water inlet temperature range;
if the current water inlet temperature is higher than the highest temperature of the target water inlet temperature range, reducing the water outlet temperature of the cooling water treatment device, and enabling the current water outlet temperature to be subjected to temperature difference temperature reduction through the deep correction adjustment;
and if the current water inlet temperature is lower than the lowest temperature of the target water inlet temperature range, increasing the outlet water temperature of the cooling water treatment device, namely, the current outlet water temperature is increased by the deeply corrected and adjusted temperature difference.
Accordingly, a storage medium stores a computer program which, when executed by a processor, implements any of the above-described methods for controlling temperature of cooling water of a continuous casting mold.
Correspondingly, an electronic terminal comprises: a processor and a memory;
the memory is used for storing a computer program;
the processor is used for executing the computer program stored in the memory so as to enable the electronic terminal to execute any one of the temperature control methods of the cooling water of the continuous casting crystallizer.
According to the invention, the outlet water temperature is adjusted according to the temperature difference between the preset outlet water temperature and the inlet water temperature before correction, so that the inlet water temperature of the crystallizer is close to or equal to the target inlet water temperature, the inlet water temperature of the crystallizer is more accurately controlled, the influence of factors such as the environmental temperature on the inlet water temperature is reduced, and the influence on the casting blank quality due to the unstable cooling water temperature is favorably avoided.
Drawings
FIG. 1 is a schematic diagram of a conventional temperature control system;
FIG. 2 is a graph showing the variation trend of crystallizer inlet water temperature within 30 minutes for a certain iron and steel enterprise;
FIG. 3 is a schematic structural diagram of a temperature control system according to the present invention;
the description of reference numerals in the examples includes:
the crystallizer 100, a first water inlet A and a first water outlet B;
the cooling water treatment device 200, a second backwater inlet C and a second water outlet D;
a first temperature acquisition element 300, the second temperature acquisition element 400, a third temperature acquisition element 500 and an electronic terminal 600;
a first conduit 710, a second conduit 720.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
It is to be understood that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, like reference numerals refer to like elements throughout.
It should be noted that the temperature control method of the cooling water of the continuous casting crystallizer of the present invention is executed based on a temperature control system of the cooling water of the continuous casting crystallizer, see figure 3, the temperature control system comprises a cooling water treatment device 200, a first temperature acquisition element 300, a second temperature acquisition element 400 and an electronic terminal 600, wherein the electronic terminal is respectively connected with the cooling water treatment device 200, the first temperature acquisition element 300, the second temperature acquisition element 400 and the electronic terminal 600, a cooling water circulation pipeline is arranged between a crystallizer 100 and the cooling water treatment device 200 and comprises a first pipeline 710 and a second pipeline 7620, the crystallizer 100 is provided with a first water inlet A and a first water outlet B, the cooling water treatment device 200 is provided with a second water return inlet C and a second water outlet D, the first water outlet B is connected with the second water return inlet C through the first pipeline 710, and the second water outlet D is connected with the first water inlet A through the second pipeline 720; the first temperature collecting element 300 is disposed near the second water outlet D for collecting the real-time outlet water temperature of the cooling water treatment apparatus 200, and the second temperature collecting element 400 is disposed near the first water inlet a for collecting the real-time inlet water temperature of the mold 100.
The temperature control method comprises the following steps:
acquiring the outlet water temperature of the cooling water treatment device 200 in real time;
acquiring the water inlet temperature of the crystallizer 100 in real time;
s200, pre-adjusting the water outlet temperature, and adjusting the water outlet temperature of the cooling water treatment device 200 to the pre-adjusted water outlet temperature TGo out 1The preset outlet water temperature TGo out 1Is a target inlet water temperature T of the crystallizer 100Target；
S400, acquiring the inlet water temperature T before correction1 toWhen the outlet water temperature of the cooling water treatment device 200 is the target inlet water temperature TTargetThe water inlet temperature of the crystallizer 100 is the water inlet temperature T before correction1 to；
S600, correcting the water inlet temperature and adjusting the water outlet temperature T according to the preset water outlet temperatureGo out 1And the inlet water temperature T before correction1 toThe temperature difference of the cooling water treatment device 200 is adjusted to the corrected outlet water temperature TGo out 2The temperature of the water entering the crystallizer 100 is close to or equal to the target temperature TTarget。
Specifically, the method for correcting the inlet water temperature (S600) includes:
s610, calculating the compensation temperature tCompensationSaid compensation temperature tCompensationEqual to the preset outlet water temperature TGo out 1And the inlet water temperature T before correction1 toIs the temperature difference of (i.e. t)Compensation＝TGo out 1-T1 to；
S620, calculating the corrected outlet water temperature TGo out 2Corrected outlet water temperature TGo out 2Equal to the preset outlet water temperature TGo out 1And the compensation temperature tCompensationSum, i.e. TGo out 2＝TGo out 1+tCompensation(ii) a And
s630, controlling the cooling water treatment device 200 to adjust the outlet water temperature to the corrected outlet water temperature TGo out 2。
According to the invention, the outlet water temperature is adjusted according to the temperature difference between the preset outlet water temperature and the inlet water temperature before correction, so that the inlet water temperature of the crystallizer is close to or equal to the target inlet water temperature, the inlet water temperature of the crystallizer is controlled more accurately, the influence of factors such as the environmental temperature on the inlet water temperature is reduced, and the influence on the casting blank quality caused by the unstable cooling water temperature is favorably avoided.
In some embodiments, the temperature control method further includes acquiring a return water temperature of the cooling water treatment apparatus 200 in real time;
and when controlling the cooling water treatment device 200 to adjust the outlet water temperature to the corrected outlet water temperature, controlling the cooling water treatment device 200 according to the return water temperature and the outlet water temperature of the cooling water treatment device 200.
For the sake of understanding, taking the process requirement temperature (target water inlet temperature) equal to 28 ℃ as an example, the temperature control method of the present invention will now be described by referring to an embodiment, which includes:
s200, pre-adjusting the water outlet temperature to enable the water outlet temperature T to be pre-adjustedGo out 1＝TTarget＝28℃；
S400, acquiring the inlet water temperature T before correction1 to＝26℃；
S600, correcting the water inlet temperature, comprising the following steps:
s610, calculating the compensation temperature tCompensation＝TGo out 1-T1 to＝2℃；
S620, calculating the corrected outlet water temperature TGo out 2＝TGo out 1+tCompensation＝28℃+2℃＝30℃；
S630, controlling the cooling water treatment device 200 to adjust the outlet water temperature to TGo out 2The current water inlet temperature of the crystallizer 100 may be acquired as 28.2 ℃, that is, the corrected water inlet temperature T may be 30 ℃In 2＝28.2℃。
In the following embodiments, the inlet water temperature refers to the inlet water temperature of the mold 100, and the outlet water temperature refers to the outlet water temperature of the cooling water treatment apparatus 200.
In some embodiments, the temperature control method further includes the step S700 of verifying the current water inlet temperature after correcting the water inlet temperature:
according to the target water inlet temperature TTargetPresetting a target water inlet temperature range;
acquiring the current water inlet temperature;
and judging whether the current water inlet temperature is within the water inlet temperature range, if so, finishing temperature adjustment, otherwise, performing deep correction, namely executing S800 until the current water inlet temperature is within the water inlet temperature range.
For example, the target inlet temperature T is presetTargetThe temperature range of the target water entering is correspondingly preset to be 27.5-28.5 ℃ when the temperature is 28 ℃; the current water inlet temperature is TIn 2，TIn 2When the temperature is 28.2 ℃, the temperature is adjusted when the temperature is 28.2 ℃ within the target water entering temperature range of 27.5-28.5 ℃.
In some embodiments, S800, the method of performing the depth correction includes:
s810, presetting a depth correction adjustment temperature difference delta T;
s820, acquiring the current effluent temperature of the cooling water treatment device 200;
and S830, controlling the cooling water treatment device 200 to adjust the temperature adjustment outlet water temperature by deeply correcting and adjusting the temperature difference delta T.
Specifically, in some embodiments, the method for controlling the cooling water treatment apparatus 200 to adjust the outlet water temperature by the depth-corrected adjustment temperature difference in S830 includes:
comparing the current water inlet temperature with a target water inlet temperature range;
if the current inlet water temperature is higher than the highest temperature of the target inlet water temperature range, reducing the outlet water temperature of the cooling water treatment device 200, and enabling the current outlet water temperature to be reduced by the depth correction adjustment temperature difference;
if the current inlet temperature is lower than the lowest temperature of the target inlet temperature range, the outlet temperature of the cooling water treatment device 200 is increased, namely the current outlet temperature is increased by the depth correction adjustment temperature difference.
For example, the depth correction adjustment temperature difference may be preset to 0.1 ℃ (S810), i.e., Δ T ═ 0.1 ℃; acquiring the current water outlet temperature (S820), wherein the current water inlet temperature is 28.6 ℃, and the current water outlet temperature is 30 ℃ as an example; comparing the water inlet temperature with the target water inlet temperature range (S830), wherein the current water inlet temperature is 28.6 ℃, the current water outlet temperature is reduced by 0.1 ℃ if the current water inlet temperature is not within the target water inlet temperature range of 27.5-28.5 ℃, the current water outlet temperature is reduced to 30 ℃, the current water inlet temperature is obtained again and is 28.5, the current water inlet temperature is checked again, and the current water inlet temperature is within the target water inlet temperature range.
For another example, the depth correction adjustment temperature difference may be preset to 0.2 ℃ (S810), i.e., Δ T ═ 0.2 ℃; acquiring the current water outlet temperature (S820), wherein the current water inlet temperature is 27.3 ℃, and the current water outlet temperature is 29.5 ℃ as an example; comparing the water inlet temperature with the target water inlet temperature range (S830), wherein the current water inlet temperature is 27.3 ℃, and the current water outlet temperature is increased by 0.2 ℃ if the current water inlet temperature is not within the target water inlet temperature range of 27.5-28.5 ℃, or the water outlet temperature is increased to 29.7 ℃.
Accordingly, a storage medium stores a computer program which, when executed by a processor, implements any of the above-described methods for controlling the temperature of cooling water of the continuous casting mold 100.
Correspondingly, an electronic terminal comprises: a processor and a memory;
the memory is used for storing a computer program;
the processor is used for executing the computer program stored in the memory so as to enable the electronic terminal to execute any one of the temperature control methods of the cooling water of the continuous casting mold 100.
It should be noted that the Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
In the description of the invention, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, components, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, and/or groups thereof.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. A temperature control method for cooling water of a continuous casting crystallizer, wherein a cooling water circulation pipeline is arranged between the crystallizer and a cooling water treatment device, and is characterized by comprising the following steps:
acquiring the outlet water temperature of the cooling water treatment device in real time;
acquiring the water inlet temperature of the crystallizer in real time;
pre-adjusting the water outlet temperature, and adjusting the water outlet temperature of the cooling water treatment device to the pre-adjusted water outlet temperature, wherein the pre-adjusted water outlet temperature is the target water inlet temperature of the crystallizer;
acquiring the inlet water temperature before correction, wherein when the outlet water temperature of the cooling water treatment device is the target inlet water temperature, the inlet water temperature of the crystallizer is the inlet water temperature before correction;
and correcting the water inlet temperature, and adjusting the water outlet temperature of the cooling water treatment device to the corrected water outlet temperature according to the temperature difference between the preset water outlet temperature and the water inlet temperature before correction, so that the water inlet temperature of the crystallizer is close to or equal to the target water inlet temperature.
2. The method for controlling the temperature of cooling water of a continuous casting crystallizer according to claim 1, wherein the method for correcting the temperature of the inlet water comprises the following steps:
calculating a compensation temperature, wherein the compensation temperature is equal to the temperature difference between the preset outlet water temperature and the inlet water temperature before correction;
calculating the corrected outlet water temperature, wherein the corrected outlet water temperature is equal to the sum of the preset outlet water temperature and the compensation temperature; and
and controlling the cooling water treatment device to adjust the water outlet temperature to the corrected water outlet temperature.
3. The temperature control method of the cooling water of the continuous casting crystallizer according to claim 1, wherein the temperature control method further comprises the steps of obtaining the return water temperature of the cooling water treatment device in real time;
and when the cooling water treatment device is controlled to adjust the water outlet temperature to the corrected water outlet temperature, the cooling water treatment device is controlled according to the return water temperature and the water outlet temperature of the cooling water treatment device.
4. The method for controlling the temperature of the cooling water of the continuous casting crystallizer according to claim 1, wherein the method for controlling the temperature further comprises the following steps of checking the current water inlet temperature after correcting the water inlet temperature:
presetting a target water inlet temperature range according to the target water inlet temperature;
acquiring the current water inlet temperature;
and judging whether the current water inlet temperature is within the water inlet temperature range, if so, finishing temperature adjustment, and if not, performing deep correction until the current water inlet temperature is within the water inlet temperature range.
5. The method for controlling the temperature of the cooling water of the continuous casting crystallizer according to claim 4, wherein the method comprises the following steps: the method for performing the depth correction comprises the following steps:
presetting a depth correction adjustment temperature difference;
acquiring the current effluent temperature of the cooling water treatment device;
and controlling the cooling water treatment device to adjust the outlet water temperature by the depth correction adjusting temperature difference.
6. The method for controlling the temperature of the cooling water of the continuous casting crystallizer according to claim 5, wherein the method for controlling the cooling water treatment device to adjust the outlet water temperature by the depth correction adjustment temperature difference comprises the following steps:
comparing the current water inlet temperature with a target water inlet temperature range;
if the current water inlet temperature is higher than the highest temperature of the target water inlet temperature range, reducing the water outlet temperature of the cooling water treatment device, and enabling the current water outlet temperature to be subjected to temperature difference temperature reduction through the deep correction adjustment;
and if the current water inlet temperature is lower than the lowest temperature of the target water inlet temperature range, increasing the outlet water temperature of the cooling water treatment device, namely, the current outlet water temperature is increased by the deeply corrected and adjusted temperature difference.
7. A storage medium storing a computer program, characterized in that: the computer program, when executed by a processor, implements the method of controlling temperature of continuous casting crystallizer cooling water of any of claims 1-6.
8. An electronic terminal, comprising: a processor and a memory;
the memory is used for storing a computer program;
the processor is used for executing the computer program stored in the memory to make the electronic terminal execute the temperature control method of the cooling water of the continuous casting crystallizer of any one of claims 1 to 6.
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