Energy-saving control method for operation process of hot-rolling ultrahigh-pressure descaling pump

Abstract

The invention discloses an energy-saving control method for an operation process of a hot-rolling ultrahigh-pressure descaling pump, relates to the technical field of descaling pump energy-saving control, and aims to solve the technical problem that in the prior art, substandard descaling or excessive energy consumption caused by rhythm change cannot be avoided by monitoring core parameters in real time. And specifically, through the synergistic effect of steel grade pressure accurate matching, multi-parameter dynamic detection and equipment state optimization, double breakthrough of energy conservation, consumption reduction and production quality improvement is achieved, the descaling pressure is made to adapt to different steel grades and process requirements, a dynamic adjustment mechanism of multi-system integrated automatic control and rolling rhythm linkage is adopted, and the production efficiency is improved. According to the control method, accurate control without human intervention in the whole process is achieved, the descaling efficiency and the stability of the product surface quality are guaranteed, invalid energy consumption caused by parameter redundancy is avoided, meanwhile, quantitative monitoring and targeted operation and maintenance of the equipment operation state are achieved, the service life of the equipment is prolonged, non-planned shutdown loss is reduced, and it is ensured that a pump set is always in the optimal operation state.

Description

Technical Field

[0001] This invention relates to the field of energy-saving control technology for descaling pumps, specifically to an energy-saving control method for the operation of a hot-rolled ultra-high pressure descaling pump. Background Technology

[0002] In the hot rolling production process of modern metallurgical industry, ultra-high pressure descaling technology is a key process to ensure the surface quality of steel. Taking the 1780 hot rolling production line as an example, the ultra-high pressure descaling water pump station usually adopts the "one in use and one on standby" operation mode. During operation, the pressure of the high-pressure pump is kept constant at 32MPa. The high-pressure water flow impacts the surface of the steel to remove iron oxide scale and ensure the rolling quality. However, the traditional ultra-high pressure descaling pump operation mode has significant energy consumption and control problems.

[0003] In existing technologies, no steel grade-pressure matching database has been established, making it impossible to automatically retrieve matching information through the production planning system. This necessitates additional manual intervention and also prevents the monitoring of the residual descaling amount corresponding to changes in rolling rhythm in real time to improve the two core parameters of span and descaling time deviation. Consequently, it is impossible to avoid substandard descaling or excessive energy consumption caused by rhythm changes. Therefore, a solution is proposed. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned above by proposing an energy-saving control method for the operation of a hot-rolled ultra-high pressure descaling pump.

[0005] The objective of this invention can be achieved through the following technical solution: an energy-saving control method for the operation of a hot-rolled ultra-high pressure descaling pump, the specific energy-saving control method being as follows: Step 1: Constructing a steel grade pressure matching database; Based on the oxide layer characteristics and rolling process requirements of different steel grades, the pressure settings of the ultra-high pressure descaling pump are divided into levels; A steel grade-pressure matching database is established. Step 2: Multi-parameter fusion detection; Based on the detection of descaling pump operating parameters, and according to steel grade information, rolling rhythm and descaling requirements, automatically adjust the start-stop status, pressure level and commissioning time of the ultra-high pressure descaling pump to achieve full-process automated control. Step 3: Optimize pump equipment status. Based on the actual descaling stage monitoring, assess the status of the descaling pump and optimize control based on the assessment results.

[0006] Furthermore, the process of constructing the steel grade pressure matching database in step one is as follows: Based on the oxide layer characteristics and rolling process requirements of different steel grades, the pressure settings of the ultra-high pressure descaling pump are divided into levels; a steel grade-pressure matching database is established, and the information of the steel grade to be rolled is automatically retrieved through the production planning system to match the corresponding pressure level, thereby realizing differentiated descaling control; based on the historical production plan execution process, the pressure value set for descaling of the corresponding type of steel grade is obtained, and during the pressure value fluctuation stage, the quantitative value of descaling efficiency of the corresponding steel grade under the pressure value is recorded, that is, the quantitative value of descaling efficiency is either the surface descaling residue content or the descaling working time of the same descaling task.

[0007] Furthermore, if any data of the quantitative value of descaling efficiency of the corresponding steel grade under the pressure value meets the set threshold range, then the current steel grade type is matched with the corresponding set pressure value and a steel grade pressure matching group is formed to build a pressure matching database. If any data of the quantitative value of descaling efficiency for the corresponding steel grade under the pressure value does not meet the set threshold range, the current steel grade type and the corresponding set pressure value will be mismatched and a steel grade pressure mismatch group will be formed to match the pressure risk threshold setting in the pressure matching database.

[0008] Furthermore, the multi-parameter fusion detection process in step two is as follows: Obtain the rolling demand speed corresponding to the rolling rhythm of the current type of steel grade, and obtain the rolling demand speed increase stage and rolling demand speed decrease stage according to the rolling rhythm changes in each stage; collect the increase span of the descaling residue on the surface of the corresponding steel grade in the rolling demand speed increase stage, and at the same time collect the time deviation between the actual required time and the actual execution time of descaling on the surface of the corresponding steel grade in the rolling demand speed decrease stage. The increase span of the collected steel surface descaling residue and the time deviation between the actual required time and the actual execution time for steel surface descaling are compared with the increase span threshold and the time deviation threshold, respectively.

[0009] Furthermore, if the increase in the residual amount of descaling on the surface of the steel exceeds the threshold for the increase in the range, or if the time deviation between the actual time required for descaling on the surface of the corresponding steel exceeds the time deviation threshold, it is inferred that the descaling efficiency has decreased in the current stage of the rolling rhythm change, and the operating status of the descaling pump is adjusted, that is, the start-stop status, pressure level and commissioning time of the ultra-high pressure descaling pump are automatically adjusted. If the increase in the residual amount of descaling on the surface of the steel does not exceed the increase threshold, and the time deviation between the actual required time and the actual execution time for descaling on the surface of the corresponding steel does not exceed the time deviation threshold, it is inferred that the descaling efficiency is stable at the current stage of the rolling rhythm change. That is, there is no need to adjust the state of the descaling pump according to the current rolling rhythm change, and descaling can continue with the current settings.

[0010] Furthermore, the process of optimizing the pump equipment status in step three is as follows: The decrease range of the percentage of descaling amount on the surface of the steel grade that has been descaled during the descaling stage is obtained, that is, by comparing the real-time descaling amount with the required descaling amount on the surface of the corresponding steel grade; the decrease range of the descaling rate of the steel grade surface during the remaining steel grade descaling stage is obtained. The decreasing range of the percentage of surface descaling and the decreasing range of the surface descaling removal rate are compared with the percentage decreasing range threshold and the descaling rate decreasing range threshold, respectively: If the decrease in the percentage of surface descaling exceeds the threshold for percentage decrease, or the decrease in the surface descaling rate exceeds the threshold for descaling rate decrease, it is inferred that the descaling pump is in poor condition and the pump should be repaired. If the decrease in the percentage of surface descaling does not exceed the threshold for percentage decrease, and the decrease in the surface descaling rate does not exceed the threshold for descaling rate decrease, it is inferred that the descaling pump is in good condition.

[0011] Furthermore, troubleshooting is performed on the descaling pump. If no fault is found, it is assumed that the descaling pump is aging. After maintenance, the operating parameters are reset and the descaling demand level is adjusted. If a fault exists, the descaling pump is repaired.

[0012] Compared with the prior art, the beneficial effects of the present invention are: By dividing the pressure levels according to the characteristics of the oxide layer of the steel grade and the rolling process, differentiated and precise control of descaling pressure can be achieved, avoiding the energy waste or incomplete descaling caused by the traditional single pressure setting. The establishment of the steel grade-pressure matching database relies on the production planning system to automatically retrieve matching information, and the appropriate pressure can be quickly locked without manual intervention, which greatly improves the intelligence and efficiency of descaling control. Based on a matching and verification mechanism using historical production data, the descaling efficiency is quantified by the content of descaling residue or working time. This ensures the reliability of the matching group and provides data support for setting pressure risk thresholds, effectively avoiding quality hazards caused by improper pressure. At the same time, the system automatically shuts down unnecessary high-level ultra-high pressure descaling pump groups, eliminating ineffective energy consumption in hot standby mode, significantly reducing the energy consumption of equipment operation, and achieving dual protection of energy saving and descaling quality.

[0013] The multi-system integrated automated control program seamlessly connects production planning, mill control and equipment automation system, realizing full-process automatic control of ultra-high pressure descaling pump start-up and shutdown, pressure level and commissioning time, with a process execution rate of 100%, completely replacing manual operation. It not only reduces human error, but also greatly improves the continuity and stability of the production process. By real-time monitoring of two core parameters corresponding to changes in rolling rhythm and descaling time deviation, it can accurately capture the impact of changes in rolling rhythm on descaling efficiency, and promptly trigger pump group operation status adjustment to avoid substandard descaling or excessive energy consumption due to rhythm changes. This dynamic response mechanism ensures the stability of descaling efficiency throughout the entire rolling cycle, meeting the descaling requirements of different rolling stages while avoiding pressure redundancy and ineffective operation through precise control, further enhancing energy-saving effects, and improving the controllability of the production process and the consistency of product surface quality.

[0014] By monitoring the decline in the percentage of descaling volume and the decline in descaling speed, a quantitative evaluation standard for the operating status of pump equipment can be established. This allows for the early identification of equipment failures or aging that could lead to a decline in operating status, thus avoiding decreased descaling efficiency, surges in energy consumption, or product quality defects caused by equipment problems. Targeted measures can be taken for different states (failure, aging, normal). Failures can be repaired in a timely manner, and parameters can be re-optimized after maintenance of aging equipment. This ensures stable operation of the equipment, extends its service life, and reduces production losses caused by unplanned downtime. When the equipment is in normal condition, maintain the current settings to avoid unnecessary parameter adjustments and energy waste. After maintenance, reset the operating parameters and gear settings to ensure that the equipment is always in the optimal operating state. This ensures that the descaling effect meets the process requirements and further optimizes the energy consumption structure, achieving a synergistic improvement in equipment operation and maintenance, energy saving and consumption reduction, and production stability. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a block diagram illustrating the principle of the method of the present invention; Figure 2 This is a flowchart of the method of the present invention. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] Please see Figures 1-2 As shown, an energy-saving control method for the operation of a hot-rolled ultra-high pressure descaling pump is described. The specific energy-saving control method is as follows: Step 1: Constructing a steel grade pressure matching database; Based on the oxide layer characteristics and rolling process requirements of different steel grades, the pressure settings of ultra-high pressure descaling pumps are divided into levels; for example, in actual scenarios, they are divided into four levels: 20MPa (conventional descaling), 25MPa, 28MPa, 32MPa, and 35MPa (special steel grades). A steel grade-pressure matching database is established. The production planning system automatically retrieves information on the steel grades to be rolled and matches them with the corresponding pressure levels to achieve differentiated descaling control. Based on the historical production plan execution process, the pressure value set for descaling of the corresponding steel grade is obtained. During the pressure value fluctuation stage, the quantified value of descaling efficiency of the corresponding steel grade under the pressure value is recorded. That is, the quantified value of descaling efficiency is either the content of surface descaling residue or the descaling working time of the same descaling task. If any data of the quantified value of descaling efficiency of the corresponding steel grade under the pressure value meets the set threshold range, the current steel grade type is matched with the corresponding set pressure value and a steel grade pressure matching group is formed to construct the pressure matching database. If any data of the quantitative value of descaling efficiency of the corresponding steel grade under the pressure value does not meet the set threshold range, the current steel grade type and the corresponding set pressure value will be mismatched and a steel grade pressure mismatch group will be formed to match the pressure risk threshold setting in the pressure matching database. When the system determines the pressure level corresponding to the current steel grade, it automatically shuts down the ultra-high pressure descaling pump unit corresponding to the high pressure level to avoid energy consumption during hot standby.

[0020] Step 2: Multi-parameter fusion detection An automated control program was developed that links pressure activation with the specific steel grade, integrating the production planning management system, rolling mill control system, and equipment automation system. Based on steel grade information, rolling rhythm, and descaling requirements, the program automatically adjusts the start / stop status, pressure level, and activation time of the ultra-high pressure descaling pump, achieving full-process automated control with a 100% process execution rate. Obtain the rolling demand speed corresponding to the rolling rhythm of the current type of steel, and obtain the rolling demand speed increase stage and rolling demand speed decrease stage based on the rolling rhythm changes in each stage. The data includes the increase span of the residual descaling amount on the surface of the corresponding steel grade during the stage of increased rolling demand speed, and the time deviation between the actual required time and the actual execution time of descaling on the surface of the corresponding steel grade during the stage of decreased rolling demand speed. The increase span of the collected steel surface descaling residue and the time deviation between the actual required time and the actual execution time for steel surface descaling are compared with the increase span threshold and the time deviation threshold, respectively: If the increase in the residual amount of descaling on the surface of the steel exceeds the threshold for the increase in the range, or if the time deviation between the actual required time and the actual execution time for descaling on the surface of the corresponding steel exceeds the time deviation threshold, it is inferred that the descaling efficiency has decreased in the current stage due to the change in the rolling rhythm, and the operating status of the descaling pump is adjusted, that is, the start-stop status, pressure level and commissioning time of the ultra-high pressure descaling pump are automatically adjusted. If the increase in the residual amount of descaling on the surface of the steel does not exceed the increase threshold, and the time deviation between the actual time required for descaling on the surface of the corresponding steel does not exceed the time deviation threshold, it is inferred that the descaling efficiency is stable at the current stage of the rolling rhythm change. That is, according to the current rolling rhythm change, there is no need to adjust the state of the descaling pump, and descaling can continue to be carried out with the current setting. Step 3: Optimize the status of pump equipment The decrease range of the proportion of descaling amount on the corresponding surface of the steel grade that has been descaled during the steel grade descaling stage is obtained, that is, by comparing the real-time descaling amount with the required descaling amount on the corresponding steel grade surface. Obtain the decrease range of the descaling rate on the surface of the steel grade during the remaining steel grade descaling stage; The decreasing range of the percentage of surface descaling and the decreasing range of the surface descaling removal rate are compared with the percentage decreasing range threshold and the descaling rate decreasing range threshold, respectively: If the decrease in the percentage of surface descaling exceeds the threshold for percentage decrease, or if the decrease in the surface descaling rate exceeds the threshold for descaling rate decrease, it is inferred that the descaling pump is in poor operating condition. The descaling pump should be inspected for faults. If no faults are found, it is inferred that the descaling pump is aging. After maintenance, the operating parameters should be reset and the descaling demand level should be adjusted. If a fault exists, the descaling pump should be repaired. If the decrease in the percentage of surface descaling does not exceed the threshold for decrease in percentage, and the decrease in the surface descaling rate does not exceed the threshold for decrease in descaling rate, then the descaling pump is considered to be operating normally.

[0021] Thresholds, preset values, or preset ranges are set for result comparison and analysis to determine whether they are good or bad. The magnitude of these values ​​is determined by a combination of large-scale model analysis of the sample data and human experience. They can also be adjusted appropriately based on seasonal or common-sense influence conditions. Similarly, the weighting ratio coefficients and influence factors are set based on the magnitude of each parameter's influence on the results. These values ​​are assigned to reflect the overall impact on the results. They are also determined by a combination of large-scale model analysis of the sample data and human experience. They can also be adjusted appropriately based on seasonal or common-sense influence conditions.

[0022] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An energy-saving control method for the operation of a hot-rolled ultra-high pressure descaling pump, characterized in that, The energy-saving control methods are as follows: Step 1: Constructing a steel grade pressure matching database; Based on the oxide layer characteristics and rolling process requirements of different steel grades, the pressure settings of the ultra-high pressure descaling pump are divided into levels; A steel grade-pressure matching database is established. Step 2: Multi-parameter fusion detection; Based on the detection of descaling pump operating parameters, and according to steel grade information, rolling rhythm and descaling requirements, automatically adjust the start-stop status, pressure level and commissioning time of the ultra-high pressure descaling pump to achieve full-process automated control. Step 3: Optimize pump equipment status. Based on the actual descaling stage monitoring, assess the status of the descaling pump and optimize control based on the assessment results.

2. The energy-saving control method for the operation of a hot-rolled ultra-high pressure descaling pump according to claim 1, characterized in that, The process of constructing the steel grade pressure matching database in step one is as follows: Based on the oxide layer characteristics and rolling process requirements of different steel grades, the pressure settings of the ultra-high pressure descaling pump are divided into levels; a steel grade-pressure matching database is established, and the information of the steel grade to be rolled is automatically retrieved through the production planning system to match the corresponding pressure level, thereby realizing differentiated descaling control; based on the historical production plan execution process, the pressure value set for descaling of the corresponding type of steel grade is obtained, and during the pressure value fluctuation stage, the quantitative value of descaling efficiency of the corresponding steel grade under the pressure value is recorded, that is, the quantitative value of descaling efficiency is either the surface descaling residue content or the descaling working time of the same descaling task.

3. The energy-saving control method for the operation of a hot-rolled ultra-high pressure descaling pump according to claim 2, characterized in that, If any data of the quantitative value of descaling efficiency of the corresponding steel grade under the pressure value meets the set threshold range, then the current steel grade type is matched with the corresponding set pressure value and a steel grade pressure matching group is formed to build a pressure matching database. If any data of the quantitative value of descaling efficiency for the corresponding steel grade under the pressure value does not meet the set threshold range, the current steel grade type and the corresponding set pressure value will be mismatched and a steel grade pressure mismatch group will be formed to match the pressure risk threshold setting in the pressure matching database.

4. The energy-saving control method for the operation of a hot-rolled ultra-high pressure descaling pump according to claim 1, characterized in that, The multi-parameter fusion detection process in step two is as follows: Obtain the rolling demand speed corresponding to the rolling rhythm of the current type of steel grade, and obtain the rolling demand speed increase stage and rolling demand speed decrease stage according to the rolling rhythm changes in each stage; collect the increase span of the descaling residue on the surface of the corresponding steel grade in the rolling demand speed increase stage, and at the same time collect the time deviation between the actual required time and the actual execution time of descaling on the surface of the corresponding steel grade in the rolling demand speed decrease stage. The increase span of the collected steel surface descaling residue and the time deviation between the actual required time and the actual execution time for steel surface descaling are compared with the increase span threshold and the time deviation threshold, respectively.

5. The energy-saving control method for the operation of a hot-rolled ultra-high pressure descaling pump according to claim 4, characterized in that, If the increase in the residual amount of descaling on the surface of the steel exceeds the threshold for the increase in the range, or if the time deviation between the actual required time and the actual execution time for descaling on the surface of the corresponding steel exceeds the time deviation threshold, it is inferred that the descaling efficiency has decreased in the current stage due to the change in the rolling rhythm, and the operating status of the descaling pump is adjusted, that is, the start-stop status, pressure level and commissioning time of the ultra-high pressure descaling pump are automatically adjusted. If the increase in the residual amount of descaling on the surface of the steel does not exceed the increase threshold, and the time deviation between the actual required time and the actual execution time for descaling on the surface of the corresponding steel does not exceed the time deviation threshold, it is inferred that the descaling efficiency is stable at the current stage of the rolling rhythm change. That is, there is no need to adjust the state of the descaling pump according to the current rolling rhythm change, and descaling can continue with the current settings.

6. The energy-saving control method for the operation of a hot-rolled ultra-high pressure descaling pump according to claim 1, characterized in that, The process of optimizing the pump equipment status in step three is as follows: The decrease range of the proportion of descaling amount on the corresponding surface of the steel grade that has been descaled during the steel grade descaling stage is obtained, that is, by comparing the real-time descaling amount with the required descaling amount on the corresponding steel grade surface. Obtain the decrease range of the descaling rate on the surface of the steel grade during the remaining steel grade descaling stage; The decreasing range of the percentage of surface descaling and the decreasing range of the surface descaling removal rate are compared with the percentage decreasing range threshold and the descaling rate decreasing range threshold, respectively: If the decrease in the percentage of surface descaling exceeds the threshold for the percentage decrease, or if the decrease in the surface descaling rate exceeds the threshold for the descaling rate decrease, it is inferred that the operating condition of the descaling pump has deteriorated, and the descaling pump should be repaired. If the decrease in the percentage of surface descaling does not exceed the threshold for decrease in percentage, and the decrease in the surface descaling rate does not exceed the threshold for decrease in descaling rate, then the descaling pump is considered to be operating normally.

7. The energy-saving control method for the operation of a hot-rolled ultra-high pressure descaling pump according to claim 6, characterized in that, Troubleshooting the descaling pump involves checking for faults. If no fault is found, it is assumed that the descaling pump is aging. After maintenance, the operating parameters are reset and the descaling demand level is adjusted. If a fault exists, the descaling pump is repaired.

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