Hot rolling turbid circulating water system control method, device, equipment and medium

Abstract

The application discloses a hot rolling turbid circulating water system control method, device, equipment and medium, and belongs to the metallurgical technical field. The method comprises the following steps: obtaining the steel grade of the strip steel in the rolling plan; determining the target outlet water pressure of the hot rolling turbid circulating water system according to the steel grade; if it is detected that there is strip steel in the cooling area of the hot rolling turbid circulating water system, controlling the outlet water pressure of the hot rolling turbid circulating water system to be the target outlet water pressure; if it is detected that there is no strip steel in the cooling area of the hot rolling turbid circulating water system, controlling the outlet water pressure of the hot rolling turbid circulating water system to be the preset minimum outlet water pressure; wherein the minimum outlet water pressure is less than the target outlet water pressure. The method can adopt different target outlet water pressures for different steel grades of the strip steel to cool the hot rolling turbid circulating water system, so that the surface quality of the strip steel of each steel grade is better, the quality stability is improved, and the minimum outlet water pressure is adopted when there is no strip steel in the cooling area, so that the energy consumption can be saved.

Description

Technical Field

[0001] This application relates to the field of metallurgical technology, and in particular to a control method, device, equipment and medium for a hot rolling turbid circulating water system. Background Technology

[0002] The hot rolling turbid water circulation system plays a crucial role in core cooling and impurity removal, directly affecting the cooling effect of the rolls and the surface quality of the product.

[0003] In the prior art, the hot rolling circulating water system sprays cooling water onto the roll surface to reduce the roll temperature, prevent roll surface cracking and steel sticking, thereby improving product quality.

[0004] However, in actual hot rolling production, the temperature of the rolls fluctuates greatly under this cooling method, resulting in poor product quality stability. Summary of the Invention

[0005] In view of the above problems, this application is made to provide a control method, device, equipment and medium for a hot rolling turbid circulating water system that solves the above problems. The hot rolling turbid circulating water system can use different target outlet water pressures for cooling strips of different steel grades, so that the surface quality of strips of each steel grade is better and the quality stability is improved. At the same time, when there is no strip in the cooling zone, the lowest outlet water pressure is used, which can save energy consumption.

[0006] In a first aspect, this application provides a control method for a hot-rolling turbid circulating water system, the method comprising: Obtain the steel grade of the strip in the rolling plan; Determine the target outlet water pressure of the hot-rolled turbid circulating water system based on the steel grade; If strip steel is detected in the cooling area of ​​the hot rolling turbid circulating water system, the outlet water pressure of the hot rolling turbid circulating water system is controlled to the target outlet water pressure. If no strip is detected in the cooling area of ​​the hot rolling turbid circulating water system, the outlet water pressure of the hot rolling turbid circulating water system is controlled to the preset minimum outlet water pressure. Wherein, the minimum outlet water pressure is less than the target outlet water pressure.

[0007] Optionally, the hot rolling mill circulating water system includes a work roll cooling device for cooling the work rolls of the mill. The target outlet water pressure includes the roll cooling target outlet water pressure. The cooling area includes a first cooling area corresponding to the work roll cooling device. If strip steel is detected in the cooling area of ​​the hot rolling mill circulating water system, the outlet water pressure of the hot rolling mill circulating water system is controlled to the target outlet water pressure, including: If strip steel is detected in the first cooling area, the outlet water pressure of the work roll cooling device is controlled to be the target outlet water pressure of the roll cooling device.

[0008] Optionally, the work roll cooling device includes an inlet water collection pipe and an outlet water collection pipe. The inlet water collection pipe is used to spray cooling water onto the work roll at the inlet side, and the outlet water collection pipe is used to spray cooling water onto the work roll at the outlet side. The method further includes: If strip steel is detected in the first cooling area, both the inlet water collection pipe and the outlet water collection pipe are opened. If no strip is detected in the first cooling area, the inlet water collection pipe is closed and the outlet water collection pipe is opened.

[0009] Optionally, the hot rolling circulating water system further includes an ultra-fast cooling device arranged behind the rolling mill unit. The ultra-fast cooling device is used to cool the strip steel. The target outlet water pressure includes the fast cooling target outlet water pressure. The cooling area includes a second cooling area corresponding to the ultra-fast cooling device. If strip steel is detected in the cooling area of ​​the hot rolling circulating water system, the outlet water pressure of the hot rolling circulating water system is controlled to the target outlet water pressure, including: If strip steel is detected in the second cooling zone, the outlet water pressure of the ultra-fast cooling device is controlled to the target outlet water pressure of the fast cooling device.

[0010] Optionally, the ultra-fast cooling device includes multiple sets of fast cooling water collection pipes, which are used to spray cooling water onto the strip steel. The method further includes: Obtain the target cooling temperature of the strip in the rolling plan; Based on the target cooling temperature, determine the number of groups of rapid cooling water collection pipes to be opened, and control the opening of the target number of rapid cooling water collection pipes. The target cooling temperature is positively correlated with the number of groups.

[0011] Optionally, determining the target outlet water pressure of the hot-rolled turbid circulating water system based on the steel grade includes: Obtain the thickness of the strip in the rolling plan; The target outlet water pressure of the hot-rolled turbid circulating water system is determined based on the steel grade and the thickness. The thickness is positively correlated with the target outlet water pressure.

[0012] Optionally, determining the target outlet water pressure of the hot-rolled turbid circulating water system based on the steel grade and the thickness includes: Obtain the surface quality requirement level of the strip in the rolling plan; Determine the target outlet water pressure of the hot-rolled turbid circulating water system corresponding to the steel grade, the thickness, and the surface quality requirement level.

[0013] Secondly, this application provides a control device for a hot-rolled turbid circulating water system, the device comprising: Thirdly, this application provides an electronic device, including: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the method as described in the first aspect.

[0014] Fourthly, this application provides a computer-readable storage medium storing computer instructions for causing the computer to perform the method described in the first aspect.

[0015] The technical solutions provided in this application embodiment have at least the following technical effects or advantages: This application provides a control method, apparatus, equipment, and medium for a hot-rolled turbid water circulation system. It first obtains the steel grade of the strip in the rolling plan, and then uses the steel grade to reflect the strip's characteristics. Based on the steel grade, it determines the target outlet water pressure of the hot-rolled turbid water circulation system, setting different target outlet water pressures for different steel grades. If strip is detected in the cooling area of ​​the hot-rolled turbid water circulation system, the outlet water pressure is controlled to the target outlet water pressure to ensure the surface quality of the strip meets requirements. If no strip is detected in the cooling area, the outlet water pressure is controlled to a preset minimum outlet water pressure, reducing energy consumption when cooling is not required. This method allows for different target outlet water pressures for cooling different steel grades of strip, resulting in better surface quality for each steel grade and improved quality stability. Simultaneously, using the minimum outlet water pressure when there is no strip in the cooling area saves energy. The minimum outlet water pressure is lower than the target outlet water pressure.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a flowchart of a control method for a hot-rolling turbid circulating water system provided in an embodiment of this application; Figure 2 This is a schematic diagram of a hot-rolled turbid circulating water system provided in an embodiment of this application; Figure 3 This is a partial structural schematic diagram of an ultrafast cooling device provided in an embodiment of this application; Figure 4 This is a structural block diagram of a control device for a hot-rolling turbid circulating water system provided in an embodiment of this application. 。 Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. It should be understood that the embodiments of this disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. Unless otherwise specified, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0019] Figure 1 This is a flowchart of a control method for a hot-rolled turbid circulating water system provided in an embodiment of this application, such as... Figure 1 As shown, the method includes: Step S110: Obtain the steel grade of the strip in the rolling plan.

[0020] In this embodiment of the application, the rolling plan records information such as the steel grade to be rolled, specifications, and surface quality requirements of the product. The rolling plan is stored in the three-level system, so the steel grade of the strip in the rolling plan can be obtained from the three-level system.

[0021] The steel grades can include ordinary carbon steel, low-alloy high-strength steel and special steel, and different steel grades can be characterized by different markers.

[0022] Step S120: Determine the target outlet water pressure of the hot-rolled turbid circulating water system according to the steel grade.

[0023] In the embodiments of this application, the surface characteristics of strip steel of different steel grades are different. For example, the oxide scale on the surface of ordinary carbon steel is easy to peel off, while the oxide scale on the surface of high silicon low alloy high strength steel is difficult to peel off. Martensitic stainless steel has poor plasticity and is prone to edge cracking, while austenitic stainless steel has good plasticity but is prone to nodule formation. Therefore, for strip steel of different steel grades, the hot rolling circulating water system adopts different target outlet water pressures for cooling, so that the surface quality of strip steel of each steel grade is better, avoiding the use of the same target outlet water pressure for all steel grades, which would result in some steel grades having good surface quality and others having poor surface quality, and poor overall quality stability.

[0024] Step S130: If strip steel is detected in the cooling area of ​​the hot rolling turbid circulating water system, the outlet water pressure of the hot rolling turbid circulating water system is controlled to the target outlet water pressure.

[0025] In this embodiment, a thermal detection method can be used to detect whether there is strip steel in the cooling area of ​​the hot-rolled circulating water system. The thermal detection method involves detecting the temperature within the cooling area of ​​the hot-rolled circulating water system. If there is strip steel in the cooling area, its higher temperature will cause the temperature of the cooling area to be greater than or equal to a preset temperature threshold. If there is no strip steel in the cooling area, the temperature will be lower than the temperature threshold. In other words, if the temperature of the cooling area is greater than or equal to the preset temperature threshold, it is determined that there is strip steel in the cooling area; if the temperature of the cooling area is lower than the temperature threshold, it is determined that there is no strip steel in the cooling area.

[0026] Next, if strip steel is detected in the cooling area of ​​the hot rolling turbid circulating water system, it indicates that the steel is currently in a passing state and needs to be cooled by the hot rolling turbid circulating water system. In this case, the target outlet water pressure is forwarded to the hot rolling turbid circulating water system through the secondary system so that the hot rolling turbid circulating water system can adjust the outlet water pressure to the target outlet water pressure.

[0027] The hot rolling turbid circulating water system changes the outlet water pressure by adjusting the frequency of the water pumps. The water pumps include a booster pump and a pressurization pump. The booster pump is used to draw cooling water from the water tank into the pipeline. Changing the frequency of the booster pump can change the cooling water flow rate. The pressurization pump is used to increase the pressure of the cooling water drawn into the pipeline by the booster pump. Changing the frequency of the pressurization pump and the cooling water flow rate can change the cooling water pressure.

[0028] Step S140: If no strip is detected in the cooling area of ​​the hot rolling turbid circulating water system, the outlet water pressure of the hot rolling turbid circulating water system is controlled to the preset minimum outlet water pressure.

[0029] Among them, the minimum outlet water pressure is less than the target outlet water pressure.

[0030] In this embodiment of the application, if no strip is detected in the cooling area of ​​the hot rolling turbid circulating water system, it indicates that the current state is a steel passing gap. In this case, the hot rolling turbid circulating water system can be controlled to operate at the lowest outlet water pressure, which can ensure that the outlet pressure can be quickly increased after the steel arrives, and reduce energy consumption.

[0031] Optionally, step S120 includes: Step S1201: Obtain the thickness of the strip in the rolling plan.

[0032] In this embodiment of the application, the specifications in the rolling plan include thickness, so the thickness of the strip can be obtained from the rolling plan.

[0033] Step S1202: Determine the target outlet water pressure of the hot-rolled turbid circulating water system based on the steel grade and thickness.

[0034] In the embodiments of this application, strip steel of the same grade but different thicknesses are adapted to different target outlet water pressures. Therefore, when determining the target outlet water pressure of the hot rolling turbid circulating water system, both the steel grade and thickness can be considered.

[0035] Among them, the thickness is positively correlated with the target outlet water pressure. That is, the thicker the rolled strip, the higher the target outlet water pressure can be, and vice versa, the thinner the rolled strip, the lower the target outlet water pressure can be, so as to ensure that the surface quality of strips of different thicknesses is excellent.

[0036] Optionally, step S1202 includes: Obtain the surface quality requirement level of the strip in the rolling plan; determine the target outlet water pressure of the hot rolling turbid circulating water system corresponding to the steel grade, thickness, and surface quality requirement level.

[0037] In this embodiment, the surface quality requirement level of the strip is set before rolling. Strips with higher surface quality requirement levels have stricter requirements for the target outlet water pressure; it cannot be too high or too low, and the corresponding selectable range is smaller. Conversely, strips with lower surface quality requirement levels do not require as strict a target outlet water pressure, and the corresponding selectable range is larger. Therefore, when determining the target outlet water pressure of the hot-rolled circulating water system, in addition to considering the steel grade and thickness, the surface quality requirement level can also be taken into account.

[0038] Specifically, the target outlet water pressure is selected from the range based on the surface quality requirements and steel type, and then the target outlet water pressure is determined from the selected range based on the thickness.

[0039] In this embodiment of the application, the correspondence between the target outlet water pressure selection range, surface quality requirement level and steel type can be pre-defined. Different surface quality requirement levels and different steel types correspond to different selection ranges. In actual production, the corresponding selection range can be directly found from the correspondence based on the obtained surface quality requirement level and steel type. Then, the target outlet water pressure suitable for the thickness can be determined from the selection range.

[0040] Figure 2 This is a schematic diagram of a hot-rolled turbid circulating water system provided in an embodiment of this application, as shown below. Figure 2 As shown, the hot rolling turbid water circulation system includes a work roll cooling device (not shown in the figure). The work roll cooling device is used to cool the work rolls of the rolling mill. The work roll cooling device includes an inlet water collection pipe 1 and an outlet water collection pipe 2. The inlet water collection pipe 1 is used to spray cooling water onto the work roll 3 on the inlet side, and the outlet water collection pipe 2 is used to spray cooling water onto the work roll 3 on the outlet side.

[0041] The target outlet water pressure includes the target outlet water pressure of the roller cooler, such as... Figure 2 As shown, the cooling area includes the first cooling area A corresponding to the work roll cooling device. The first cooling area A is the area where the cooling water sprayed by the work roll cooling device exchanges heat with the work roll. The size and range of the first cooling area A can be set according to the actual situation, as long as it can cover the movement trajectory of the strip when it passes through the gap of the work roll.

[0042] Optionally, step S140 includes: If strip steel is detected in the first cooling zone, the outlet water pressure of the work roll cooling device is controlled to be the target outlet water pressure for roll cooling.

[0043] In this embodiment of the application, if strip steel is detected in the first cooling area, it means that the strip steel has entered the roll gap of the work roll and the mill is in the steel passing state. In the steel passing state, a larger cooling water pressure is required to cool the work roll, that is, the outlet water pressure of the work roll cooling device used to cool the work roll is controlled to the roll cooling target outlet water pressure.

[0044] In this embodiment, the minimum outlet water pressure includes the minimum outlet water pressure of the roll cooler. If no strip is detected in the first cooling zone and the mill is in a steel passage gap state, the outlet water pressure of the work roll cooling device is controlled to the minimum outlet water pressure of the roll cooler, so that the work roll cooling device operates at a lower outlet water pressure, thereby reducing energy consumption.

[0045] Optionally, the method also includes: If strip steel is detected in the first cooling zone, both the inlet and outlet water collection pipes are opened; if no strip steel is detected in the first cooling zone, the inlet water collection pipe is closed and the outlet water collection pipe is opened.

[0046] In this embodiment, if strip steel is detected in the first cooling area, it indicates that the mill is in the steel-passing state. In this case, both the inlet water collection pipe and the outlet water collection pipe are opened to better cool the work rolls. If no strip steel is detected in the first cooling area, it indicates that there is no strip steel in the roll gap of the work rolls and the mill is in the steel-passing gap state. In this case, the inlet water collection pipe is closed, and only the outlet water collection pipe is opened to reduce the cooling water flow rate and thus reduce power consumption.

[0047] like Figure 2 As shown, the hot rolling turbid water circulation system also includes an ultra-fast cooling device 4 located behind the rolling mill unit, which is used to cool the strip steel 5. The rolling mill unit includes a roughing mill unit and a finishing mill unit.

[0048] The target outlet water pressure includes the target outlet water pressure for rapid cooling, such as... Figure 2As shown, the cooling zone includes the second cooling zone B corresponding to the ultra-fast cooling device. The second cooling zone B is the area where the cooling water sprayed by the ultra-fast cooling device exchanges heat with the strip. The size and range of the second cooling zone B can be set according to the actual situation, as long as the second cooling zone B can cover the movement trajectory of the strip when it passes through the ultra-fast cooling device.

[0049] Optionally, step S140 includes: If strip steel is detected in the second cooling zone, the outlet water pressure of the ultra-fast cooling device is controlled to the target outlet water pressure for fast cooling.

[0050] In this embodiment of the application, if strip steel is detected in the second cooling zone, it indicates that the ultra-fast cooling device is in the process of passing steel. Therefore, the outlet water pressure of the ultra-fast cooling device is controlled to be a larger fast cooling target outlet water pressure in order to better reduce the strip steel temperature.

[0051] In this embodiment, the minimum outlet water pressure includes the minimum outlet water pressure for rapid cooling. If no strip steel is detected in the second cooling zone, it indicates that the ultra-rapid cooling device is in a steel gap state. Therefore, the outlet water pressure of the ultra-rapid cooling device is controlled to the minimum outlet water pressure for rapid cooling, so that the ultra-rapid cooling device operates at a lower outlet water pressure, thereby reducing energy consumption.

[0052] like Figure 2 As shown, the ultra-fast cooling device 4 includes multiple sets of fast cooling water collection pipes 41, which are used to spray cooling water onto the strip.

[0053] Optionally, the method also includes: Obtain the target cooling temperature of the strip in the rolling plan; based on the target cooling temperature, determine the number of groups of rapid cooling water collection pipes to be opened, and control the opening of the target number of rapid cooling water collection pipes.

[0054] The target cooling temperature is positively correlated with the number of groups.

[0055] In this embodiment, the ultra-fast cooling device is used to cool the strip steel to a target cooling temperature so that the strip steel temperature meets the requirements of subsequent operations such as coiling. Therefore, the number of sets of fast cooling water pipes that are opened can be adjusted according to the target cooling temperature of the strip steel. When the target cooling temperature is higher, more sets of fast cooling water pipes are opened to ensure that the temperature of the strip steel can be cooled to the target cooling temperature; when the target cooling temperature is lower, fewer sets of fast cooling water pipes can be opened to cool the strip steel to the target cooling temperature more effectively at a lower temperature.

[0056] One set of rapid cooling water collection pipes includes an upper water collection pipe and a lower water collection pipe. The upper water collection pipe is located above the upper surface of the strip, and the lower water collection pipe is located below the lower surface of the strip, so that the set of rapid cooling water collection pipes can cool the upper and lower surfaces of the strip at the same time, achieving a better cooling effect.

[0057] Figure 3 This is a partial structural schematic diagram of an ultrafast cooling device provided in an embodiment of this application, as shown below. Figure 3 As shown, the ultra-fast cooling device includes a booster pump 42 and a pressurizing pump 43. The booster pump 42 and the pressurizing pump 43 are connected in series and then connected to the fast cooling water collection pipe to form the first pipeline L. The booster pump 42 is also connected separately to the fast cooling water collection pipe to form the second pipeline M. The booster pump 42 is used to draw cooling water from the water tank into the pipeline, and the pressurizing pump 43 is used to increase the pressure of the cooling water drawn into the pipeline by the booster pump 42.

[0058] In this embodiment, when the rolling mill is undergoing roll changing or maintenance, the ultra-fast cooling device will be shut down. In this shutdown state, only a small amount of water needs to be retained in the rapid cooling water collection pipe. To reduce energy consumption, the booster pump can be stopped, and only the lift pump can be operated. The water drawn by the lift pump flows directly into the rapid cooling water collection pipe through the second pipeline, ensuring only a small amount of pre-flowing water remains in the pipe. Conversely, when the rolling mill is performing rolling operations, the ultra-fast cooling device will be operational, and both the lift pump and the booster pump must be running.

[0059] Taking the production of slabs with various composition systems, such as cold-rolled base materials, automotive steel, appliance steel, and container steel, as an example, with a slab thickness of 237mm and a finished product thickness of 2.5-24.5mm, the production output using the method described in this application exceeds 1 million tons. The hot rolling circulating water system operates stably, with target outlet water pressure differences between different steel grades reaching over 0.2MPa. Hourly power consumption can be reduced by over 400 kWh, while the work rolls maintain stable condition and quality. If the pressurization pump of the ultra-fast cooling unit is shut down for 5 roll periods per month (each roll period is 2.5 hours), a saving of 1257.75 kWh can be achieved, resulting in an average hourly reduction of 805.8 kWh.

[0060] Based on the same concept, embodiments of the present invention also provide a control device for a hot rolling turbidity circulating water system. Figure 4 This is a structural block diagram of a control device for a hot-rolled turbid circulating water system provided in an embodiment of this application, as shown below. Figure 4 As shown, the device 400 includes an acquisition module 401, a determination module 402, a first control module 403, and a second control module 404.

[0061] The acquisition module 401 is used to acquire the steel type of the strip in the rolling plan; Module 402 is used to determine the target outlet water pressure of the hot-rolled turbid circulating water system based on the steel grade. The first control module 403 is used to control the outlet water pressure of the hot rolling turbid circulating water system to the target outlet water pressure if strip steel is detected in the cooling area of ​​the hot rolling turbid circulating water system. The second control module 404 is used to control the outlet water pressure of the hot rolling turbid circulating water system to the preset minimum outlet water pressure if no strip steel is detected in the cooling area of ​​the hot rolling turbid circulating water system. Among them, the minimum outlet water pressure is less than the target outlet water pressure.

[0062] Optionally, the hot rolling turbid water circulation system includes a work roll cooling device for cooling the work rolls of the rolling mill. The target outlet water pressure includes the roll cooling target outlet water pressure. The cooling area includes a first cooling area corresponding to the work roll cooling device. The first control module 403 is also used for: If strip steel is detected in the first cooling zone, the outlet water pressure of the work roll cooling device is controlled to be the target outlet water pressure for roll cooling.

[0063] Optionally, the work roll cooling device includes an inlet water collector and an outlet water collector. The inlet water collector is used to spray cooling water onto the work roll at the inlet side, and the outlet water collector is used to spray cooling water onto the work roll at the outlet side. The device 400 also includes a third control module for: If strip steel is detected in the first cooling zone, both the inlet and outlet water collection pipes will be opened. If no strip is detected in the first cooling zone, the inlet water collection pipe is closed and the outlet water collection pipe is opened.

[0064] Optionally, the hot rolling turbid circulating water system also includes an ultra-fast cooling device arranged behind the rolling mill unit. The ultra-fast cooling device is used to cool the strip steel. The target outlet water pressure includes the fast cooling target outlet water pressure. The cooling area includes a second cooling area corresponding to the ultra-fast cooling device. The second control module 403 is also used for: If strip steel is detected in the second cooling zone, the outlet water pressure of the ultra-fast cooling device is controlled to the target outlet water pressure for fast cooling.

[0065] Optionally, the ultra-fast cooling device includes multiple sets of fast cooling water collection pipes for spraying cooling water onto the strip. The device 400 also includes a fourth control module for: Obtain the target cooling temperature of the strip in the rolling schedule; Based on the target cooling temperature, determine the target number of groups of rapid cooling water pipes to be opened, and control the opening of the target number of rapid cooling water pipes. The target cooling temperature is positively correlated with the number of groups.

[0066] Optionally, the determining module 402 includes: The acquisition unit is used to acquire the thickness of the strip steel in the rolling plan; The determination unit is used to determine the target outlet water pressure of the hot-rolled turbid circulating water system based on the steel grade and thickness. The thickness is positively correlated with the target outlet water pressure.

[0067] Optionally, the determining unit is also used for: Obtain the surface quality requirement level of the strip steel in the rolling plan; Determine the target outlet water pressure of the hot-rolled turbid circulating water system corresponding to the steel grade, thickness, and surface quality requirement level.

[0068] It is understood that the device provided in the above embodiments is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0069] This invention also provides an electronic device that may include a processor and a memory, wherein the processor and the memory may be interconnected via a bus or other means.

[0070] The processor can be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application, or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or other chips, or combinations of the above types of chips.

[0071] Memory may include mass storage for data or instructions. For example, and not limitingly, memory may include hard disk drives (HDDs), floppy disk drives, flash memory, optical disks, magneto-optical disks, magnetic tape, or Universal Serial Bus (USB) drives, or combinations of two or more of these. Where appropriate, memory may include removable or non-removable (or fixed) media. Where appropriate, memory may be internal or external to an electronic device. In a particular embodiment, memory may be non-volatile solid-state memory.

[0072] In one instance, the memory may be read-only memory (ROM). In one instance, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0073] The processor reads and executes computer program instructions stored in the memory to implement any of the control methods for the hot rolling turbid circulating water system in the above embodiments.

[0074] In one example, the electronic device may further include a communication interface and a bus. The processor, memory, and communication interface are connected via the bus to communicate with each other. The communication interface is primarily used to enable communication between the various modules, devices, units, and / or equipment in the embodiments of this application. Where appropriate, the bus may include one or more buses.

[0075] Furthermore, in conjunction with the control method of the hot rolling turbid circulating water system in the above embodiments, the present invention can be implemented using a computer-readable storage medium. This computer-readable storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any one of the control methods of the hot rolling turbid circulating water system in the above embodiments.

[0076] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. The storage medium can be read-only memory (ROM), random access memory (RAM), flash memory, hard disk drive (HDD), or solid-state drive (SSD), etc.; the storage medium can also include combinations of the above types of memory.

[0077] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: This application provides a control method, apparatus, equipment, and medium for a hot-rolled turbid water circulation system. It first obtains the steel grade of the strip in the rolling plan, and then uses the steel grade to reflect the strip's characteristics. Based on the steel grade, it determines the target outlet water pressure of the hot-rolled turbid water circulation system, setting different target outlet water pressures for different steel grades. If strip is detected in the cooling area of ​​the hot-rolled turbid water circulation system, the outlet water pressure is controlled to the target outlet water pressure to ensure the surface quality of the strip meets requirements. If no strip is detected in the cooling area, the outlet water pressure is controlled to a preset minimum outlet water pressure, reducing energy consumption when cooling is not required. This method allows for different target outlet water pressures for cooling different steel grades of strip, resulting in better surface quality for each steel grade and improved quality stability. Simultaneously, using the minimum outlet water pressure when there is no strip in the cooling area saves energy. The minimum outlet water pressure is lower than the target outlet water pressure.

[0078] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0079] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0080] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in a claim. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. A control method for a hot rolling mill turbid circulating water system, characterized in that, The method includes: Obtain the steel grade of the strip in the rolling plan; Determine the target outlet water pressure of the hot-rolled turbid circulating water system based on the steel grade; If strip steel is detected in the cooling area of ​​the hot rolling turbid circulating water system, the outlet water pressure of the hot rolling turbid circulating water system is controlled to the target outlet water pressure. If no strip is detected in the cooling area of ​​the hot rolling turbid circulating water system, the outlet water pressure of the hot rolling turbid circulating water system is controlled to the preset minimum outlet water pressure. Wherein, the minimum outlet water pressure is less than the target outlet water pressure.

2. The control method for the hot rolling turbid circulating water system according to claim 1, characterized in that, The hot rolling mill circulating water system includes a work roll cooling device for cooling the work rolls of the rolling mill. The target outlet water pressure includes the roll cooling target outlet water pressure. The cooling area includes a first cooling area corresponding to the work roll cooling device. If strip steel is detected in the cooling area of ​​the hot rolling mill circulating water system, the outlet water pressure of the hot rolling mill circulating water system is controlled to the target outlet water pressure, including: If strip steel is detected in the first cooling area, the outlet water pressure of the work roll cooling device is controlled to the target outlet water pressure of the roll cooling device.

3. The control method for the hot rolling turbid circulating water system according to claim 2, characterized in that, The work roll cooling device includes an inlet water collection pipe and an outlet water collection pipe. The inlet water collection pipe is used to spray cooling water onto the work roll at the inlet side, and the outlet water collection pipe is used to spray cooling water onto the work roll at the outlet side. The method further includes: If strip steel is detected in the first cooling area, both the inlet water collection pipe and the outlet water collection pipe are opened. If no strip is detected in the first cooling area, the inlet water collection pipe is closed and the outlet water collection pipe is opened.

4. The control method for the hot rolling turbid circulating water system according to claim 1, characterized in that, The hot rolling mill circulating water system also includes an ultra-fast cooling device arranged behind the rolling mill unit. The ultra-fast cooling device is used to cool the strip steel. The target outlet water pressure includes the fast cooling target outlet water pressure. The cooling area includes a second cooling area corresponding to the ultra-fast cooling device. If strip steel is detected in the cooling area of ​​the hot rolling mill circulating water system, the outlet water pressure of the hot rolling mill circulating water system is controlled to the target outlet water pressure, including: If strip steel is detected in the second cooling zone, the outlet water pressure of the ultra-fast cooling device is controlled to the target outlet water pressure of the fast cooling device.

5. The control method for the hot rolling turbid circulating water system according to claim 4, characterized in that, The ultra-rapid cooling device includes multiple sets of rapid cooling water collection pipes, which are used to spray cooling water onto the strip. The method further includes: Obtain the target cooling temperature of the strip in the rolling plan; Based on the target cooling temperature, determine the number of groups of rapid cooling water collection pipes to be opened, and control the opening of the target number of rapid cooling water collection pipes. The target cooling temperature is positively correlated with the number of groups.

6. The control method for the hot rolling turbid circulating water system according to claim 1, characterized in that, Determining the target outlet water pressure of the hot-rolled turbid circulating water system based on the steel grade includes: Obtain the thickness of the strip in the rolling plan; The target outlet water pressure of the hot-rolled turbid circulating water system is determined based on the steel grade and the thickness. The thickness is positively correlated with the target outlet water pressure.

7. The control method for the hot rolling turbid circulating water system according to claim 6, characterized in that, Determining the target outlet water pressure of the hot-rolled turbid circulating water system based on the steel grade and the thickness includes: Obtain the surface quality requirement level of the strip in the rolling plan; Determine the target outlet water pressure of the hot-rolled turbid circulating water system corresponding to the steel grade, the thickness, and the surface quality requirement level.

8. A control device for a hot-rolled turbid circulating water system, characterized in that, The device includes: The acquisition module is used to acquire the steel type of the strip in the rolling plan; The determination module is used to determine the target outlet water pressure of the hot-rolled turbid circulating water system based on the steel grade. The first control module is used to control the outlet water pressure of the hot rolling turbid circulating water system to the target outlet water pressure if strip steel is detected in the cooling area of ​​the hot rolling turbid circulating water system. The second control module is used to control the outlet water pressure of the hot rolling turbid circulating water system to a preset minimum outlet water pressure if it is detected that there is no strip steel in the cooling area of ​​the hot rolling turbid circulating water system. Wherein, the minimum outlet water pressure is less than the target outlet water pressure.

9. An electronic device, characterized in that, include: A memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, the processor executing the computer instructions to perform the method of any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the method of any one of claims 1-7.

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