Water supply and return system for tuyere small sleeve

Abstract

The invention discloses a tuyere small sleeve water supply and return system, which comprises a system debugging module for checking and debugging a flow meter and a temperature sensor based on analysis of detection data of the flow meter and the temperature sensor, checking the accuracy of output signals of the flow meter and the temperature sensor, and sending the detected data to the system debugging module; the flow meter and the temperature sensor with the deviation exceeding the expected range are adjusted; the data collection module is used for analyzing and acquiring monitoring data of the tuyere small sleeve based on the debugged and calibrated flow meter and temperature sensor; the data analysis module is used for analyzing the water supply and return flow difference based on the collected monitoring data to obtain a flow trend value, analyzing and generating a flow trend signal, analyzing the change trend of the temperature of the water return pipe to obtain a temperature trend value, and analyzing and generating a temperature trend signal; performing comprehensive analysis based on the flow trend value and the temperature trend value to obtain a change cooperation signal; and the safety early warning module is used for analyzing the safety condition of the tuyere small sleeve based on the received alarm signal.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving heat exchange devices, and particularly relates to a water supply and return system for a tuyere sleeve. Background Art

[0002] In the prior art, in a blast furnace production system, there is a device called a tuyere sleeve in the air inlet device. The front end of the tuyere sleeve is in contact with high-temperature materials and gases, and the temperature is as high as 1400°C. The function of the tuyere sleeve is to support the continuous entry of high-temperature air into the air inlet pipe; the outer end of the tuyere sleeve works at high temperature for a long time, and an energy-saving heat exchange device is required to cool the tuyere sleeve. Water enters through the water supply end of the tuyere sleeve and exits through the water return end to keep the overall temperature of the sleeve below 50°C. The external heat is transferred to the sleeve and then carried away by water in time to ensure the normal operation of the tuyere sleeve; due to high wind abrasion or internal material dripping in the tuyere sleeve, water leakage occurs in the sleeve, resulting in uneven water output of the sleeve. The water enters the blast furnace, affecting the safe operation of the blast furnace and the stable operation of the blast furnace condition. When water leakage occurs in the tuyere sleeve due to high wind abrasion or material dripping, it cannot be detected in time. When the water leakage has caused uneven water output of the tuyere sleeve and the water enters the blast furnace, affecting its safe operation and furnace condition stability, it is only discovered. The problem is discovered late, and it is difficult to take measures in the early stage to avoid more serious consequences;

[0003] Therefore, the present invention provides a water supply and return system for a tuyere sleeve. Summary of the Invention

[0004] The purpose of the present invention is to provide a water supply and return system for a tuyere sleeve to solve at least one of the above-mentioned prior art problems.

[0005] The present invention provides a water supply and return system for a tuyere sleeve, including the following modules:

[0006] System debugging module: Analyze the detection data of the flowmeter and the temperature sensor, calibrate and debug the flowmeter and the temperature sensor, check the accuracy of the output signals of the flowmeter and the temperature sensor, and adjust the flowmeter and the temperature sensor with deviations exceeding the expected range;

[0007] Data collection module: Based on the flowmeter and the temperature sensor after debugging and calibration, analyze and obtain the monitoring data of the tuyere sleeve;

[0008] Data analysis module: Based on the collected monitoring data, analyze to obtain a flow trend value, generate a flow trend signal, analyze the temperature of the return pipe to obtain a temperature trend value, and generate a temperature trend signal; conduct comprehensive analysis to obtain a change coordination signal;

[0009] Safety warning module: Analyze the safety situation of the tuyere sleeve based on the received alarm signal.

[0010] Advantages of the present invention:

[0011] 1. By collecting detection data, analyzing, proofreading, and debugging, the accuracy of the device output signal can be effectively checked and adjusted, and the measurement error can be reduced. For the water supply with the same calibrated standard flow rate, calculate the average flow deviation ratio to reduce the random error during the measurement process, making the detection results accurate and reliable. Detect the measurement error of the flowmeter, identify the unqualified flowmeters with large measurement errors, and conduct targeted debugging or replacement. Further analyze the overall coefficient of variation and the grouped coefficient of variation of the initially qualified flowmeters, and gradually screen out the flowmeters that need to be debugged and the corresponding standard flow groups. Avoid debugging all devices without discrimination, and improve the debugging efficiency.

[0012] 2. Clean and smooth the time series of the monitoring data to remove outliers and noise, making the displayed data reliable and valuable for analysis. By analyzing key indicators, accurately identify the potential risks of the tuyere small sleeve. Judge the risks of water leakage and weakened cooling effect, distinguish different risk levels, and issue accurate early warnings in a timely manner. Adjust key parameters according to the actual situation and historical experience to make the system adapt to different working environments and requirements. According to different alarm signals, correspond to different alarm indicator light states and information prompts to intuitively and quickly understand the safety status of the tuyere small sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 is a flowchart of the operation steps of a tuyere small sleeve supply and return water system provided in Embodiment 1 of the present invention;

[0015] Figure 2 is a schematic structural diagram of a tuyere small sleeve supply and return water system provided in Embodiment 2 of the present invention;

[0016] Figure 3 is a schematic structural diagram of a tuyere small sleeve supply and return water system provided in an embodiment of the present invention;

[0017] Figure 4 is a schematic diagram of the monitoring and early warning interface of a tuyere small sleeve supply and return water system provided in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solution in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0019] Embodiment 1

[0020] As Figure 1 and Figure 2 shown, a supply and return water system for a tuyere small sleeve provided by an embodiment of the present invention specifically includes the following modules:

[0021] System debugging module: Based on the flow meters that collect the water flow rates at both ends of the supply and return water of the tuyere small sleeve and the temperature sensors that collect the water temperatures at both ends of the supply and return water, obtain the detection data of the flow meters and temperature sensors and analyze them. Based on the analysis results, calibrate and debug the flow meters and temperature sensors, check the accuracy of the output signals of the flow meters and temperature sensors, and adjust the flow meters and temperature sensors whose deviations exceed the expected range;

[0022] It should be noted that the detection data includes: the readings of the flow meters and the readings of the temperature sensors;

[0023] In some specific embodiments, as Figure 3 shown, based on the flow meters that collect the water flow rates at both ends of the supply and return water of the tuyere small sleeve, ensure that the flow meters are installed on the straight pipe section, the arrow direction of the sensor body is consistent with the water flow direction, increase the water pressure to α times the working water pressure after water is passed, maintain the water pressure for a period of time, and ensure that there is no leakage in the supply and return water of the tuyere small sleeve;

[0024] It should be noted that the increased water pressure after water is passed is greater than the working water pressure, that is, α is greater than 1;

[0025] Based on the non-leakage situation of the tuyere small sleeve, close the pipeline valve to ensure that there is no water flowing to and from the tuyere small sleeve, and calibrate the zero point of the flow meter;

[0026] Based on the standard flow calibration device, introduce different calibrated standard flow rates. For the water supply with the same calibrated standard flow rate, obtain the readings of the flow meter to be adjusted multiple times, divide the detection period into multiple detection sub-periods, and obtain the readings of the flow meter to be adjusted at the end of the detection sub-period;

[0027] It should be noted that the standard flow calibration device refers to the equipment specifically used for calibrating and verifying the flow measuring instruments of the supply and return water in the pipeline to ensure the accuracy and reliability of their measurements. High-precision devices including but not limited to volumetric standard devices and weighing standard devices are adopted; the calibrated flow refers to the accurate flow values corresponding to different flows after the standard flow calibration device has been accurately calibrated, and the flowmeter to be adjusted is calibrated and adjusted based on the reference flow value.

[0028] Based on the obtained readings of the flowmeter to be adjusted, the difference between the readings of the flowmeter to be adjusted and the standard flow calibrated by the standard flow calibration device is processed to obtain the flow deviation.

[0029] Based on the obtained flow deviation, the flow deviation is processed by taking the ratio with the corresponding standard flow to obtain the flow deviation ratio. The measurement data of the flowmeter to be adjusted at different flows are shown in Table 1 below;

[0030] <![CDATA[Standard flow rate (m 3 / h)]]> <![CDATA[Flowmeter reading (m 3 / h)]]> <![CDATA[Flow deviation (m 3 / h)]]> Flow deviation ratio 24 (20% of full scale) 24.3 +0.3 +0.0125 48 (40% of full scale) 47.8 -0.2 -0.0042 72 (60% of full scale) 72.5 +0.5 +0.0069 96 (80% of full scale) 95.0 -1.0 -0.0104 120 (100% of full scale) 118.5 -1.5 -0.0125

[0031] Table 1 Statistical table of detection data of the flowmeter to be adjusted at different flows. The multiple measurement data of the flowmeter to be adjusted at the same flow are shown in Table 2 below;

[0032]

[0033]

[0034] Table 2 Statistical table of multiple measurement data of the flowmeter to be adjusted at the same flow

[0035] Based on taking the absolute value of the obtained flow deviation ratio, the flow deviation value is obtained. The obtained flow deviation value is compared with the preset flow deviation threshold to analyze and obtain the initially qualified flowmeters that meet the expectations.

[0036] Specifically, if the flow deviation value is greater than or equal to the preset flow deviation threshold, it indicates that the measurement error of the corresponding flowmeter to be adjusted is large, and it is marked as an unqualified flowmeter and replaced in a timely manner;

[0037] If the flow deviation value is less than the preset flow deviation threshold, it indicates that the measurement error of the corresponding flowmeter to be adjusted is small and has little impact on the accuracy of the monitoring data. It is marked as an initially qualified flowmeter and further tested and adjusted.

[0038] Based on the obtained initially qualified flowmeters, the readings of the initially qualified flowmeters are obtained, the flow deviation ratio is calculated and grouped. The readings of the initially qualified flowmeters obtained under the same standard flow are divided into the same group of data, and the average flow deviation ratio μ of the readings of the initially qualified flowmeters in the same group is calculated through the formula 组 , and the average flow deviation ratio μ of all the readings of the initially qualified flowmeters is obtained through calculation总 ;

[0039] Based on the average flow deviation ratio μ of all initially qualified flowmeter readings obtained by calculation 总 , through the formula calculate the overall coefficient of variation CV of all flow deviation ratios 总 , where, m i is the number of flow deviation ratios of the initially qualified flowmeter readings in each group, s ij is the flow deviation ratio of the initially qualified flowmeter readings, μ 总i is the average flow deviation ratio of the initially qualified flowmeter readings in each group, and n is the number of groups;

[0040] Based on the calculated overall coefficient of variation CV 总 , compare the overall coefficient of variation with the preset coefficient of variation CV0, and analyze and judge whether the initially qualified flowmeters need to be adjusted and classified;

[0041] Specifically, if the overall coefficient of variation CV 总 is greater than or equal to the preset coefficient of variation threshold CV0, it indicates that there are errors in the initially qualified flowmeters that affect the monitoring, and mark the corresponding initially qualified flowmeters as flowmeters to be adjusted and qualified;

[0042] If the overall coefficient of variation CV 总 is less than the preset coefficient of variation threshold CV0, it indicates that there are no errors in the initially qualified flowmeters that affect the monitoring, and mark the corresponding initially qualified flowmeters as qualified flowmeters;

[0043] Based on the flowmeters to be adjusted and qualified obtained by classification, through the formula calculate the coefficient of variation CV of each group 组 , where, m i is the number of flow deviation ratios of the readings of the flowmeters to be adjusted and qualified in each group, s ij is the flow deviation ratio of the readings of the flowmeters to be adjusted and qualified, μ 组i is the average flow deviation ratio of the readings of the flowmeters to be adjusted and qualified in each group, and Q 标 is the calibrated standard flow;

[0044] Based on the calculated coefficient of variation CV of each group 组 , compare the coefficient of variation CV 组 of the flowmeters to be adjusted and qualified with the preset coefficient of variation threshold CV1, and analyze and judge whether the flowmeters to be adjusted and qualified need to be adjusted and classified;

[0045] Specifically, if the coefficient of variation CV of each group 组If it is greater than or equal to the preset coefficient of variation threshold CV1, it indicates that there is an error affecting the monitoring in the flowmeter to be adjusted under the corresponding standard flow rate. Mark the corresponding group as the group to be adjusted, and calibrate and debug the corresponding flowmeter to be adjusted and qualified;

[0046] If the coefficient of variation CV of the group 组 is less than the preset coefficient of variation threshold CV1, it indicates that there is no error affecting the monitoring in the flowmeter to be adjusted under the corresponding standard flow rate. Mark the corresponding group as the qualified group;

[0047] Compare and calibrate the temperature sensor with the standard thermometer, perform difference processing on the readings of the temperature sensor and the standard thermometer and take the absolute value to obtain the temperature deviation value;

[0048] Compare the obtained temperature deviation value with the preset temperature deviation threshold, and analyze and judge to select the temperature sensor that meets the expectation;

[0049] Specifically, if the temperature deviation value is greater than or equal to the temperature deviation threshold, it indicates that the measurement deviation of the corresponding temperature sensor affects the monitoring result, and it is recorded as an unqualified temperature sensor;

[0050] If the temperature deviation value is less than the temperature deviation threshold, it indicates that the measurement deviation of the corresponding temperature sensor does not affect the monitoring result, and it is recorded as a qualified temperature sensor. Use the qualified temperature sensor to monitor the temperature of the return water pipe;

[0051] The technical solution of the embodiment of the present invention is as follows: By collecting the data of the flowmeter at both ends of the supply and return water of the tuyere small sleeve and the temperature sensor at both ends of the supply and return water, and performing system analysis and calibration and debugging, the accuracy of the equipment output signal is effectively checked and adjusted; Zero calibration of the flowmeter and multi-flow-point calibration based on the standard flow rate calibration device are carried out to reduce the measurement error and ensure that the equipment provides reliable measurement data; For the water supply with the same calibrated standard flow rate, obtain the readings of the flowmeter to be adjusted multiple times, and divide the detection period into multiple detection sub-periods for reading acquisition, and finally calculate the average flow deviation ratio; By means of multiple measurements and taking the average value, the random error in the measurement process is reduced, so that the detection result is accurate and reliable. By calculating multiple indicators such as flow deviation, flow deviation ratio, overall coefficient of variation and group coefficient of variation, and comparing with the preset threshold, the measurement error situation of the flowmeter is detected, the unqualified flowmeter with large measurement error is identified, and the initially qualified flowmeter is further detected to determine whether there is an error affecting the monitoring, so as to carry out debugging or replacement targeted; Adopt a hierarchical debugging method to further analyze the overall coefficient of variation and group coefficient of variation of the initially qualified flowmeter, and gradually screen out the flowmeters to be debugged and the corresponding standard flow rate groups; Avoid debugging all equipment without discrimination and improve the debugging efficiency.

[0052] Example 2

[0053] As Figure 1 and Figure 2 shown, a supply and return water system for a tuyere small sleeve provided by an embodiment of the present invention specifically includes the following modules:

[0054] Data collection module: Based on the flow meter and temperature sensor after debugging and calibration, analyze and obtain the monitoring data of the tuyere small sleeve. The monitoring data includes: supply pipe flow rate, return pipe flow rate, supply and return water flow rate difference, and return pipe temperature;

[0055] In some specific embodiments, as Figure 3 shown, the flow meter and temperature sensor are connected to the data collector through the RS485 communication interface, and using the Modbus communication protocol, the real-time measured monitoring data is transmitted to the data collector in the form of digital signals;

[0056] The data collector reads the monitoring data according to the set sampling period, and performs preliminary verification and processing. The data collector transmits the processed monitoring data to the server of the control system through the industrial Ethernet to achieve real-time upload of the monitoring data;

[0057] It should be noted that the sampling period is set by the professional technical personnel of the present invention according to historical experience and can be adjusted according to the actual situation;

[0058] The temperature sensor converts the resistance signal of the thermal resistor into a standard 10mA current signal through a temperature transmitter;

[0059] Based on the obtained current signal, it is transmitted to the data collector through a shielded cable. The data collector performs analog-to-digital conversion and temperature calculation on the signal, and obtains the monitoring data according to the set sampling period;

[0060] Based on the obtained monitoring data, the data collector sends the monitoring data to the server of the control system through the industrial Ethernet;

[0061] Based on the obtained supply pipe flow rate and outlet pipe flow rate, the difference between the supply pipe flow rate and the outlet pipe flow rate is processed to obtain the supply and return water flow rate difference;

[0062] Clean the time series data of the monitoring data, remove outliers and noise, and perform smoothing processing by the moving average method. As Figure 4 shown, the monitoring data is displayed in real time through the display screen;

[0063] It should be noted that ensure that the installation positions of the flow meter and temperature sensor after debugging and calibration meet the installation requirements to avoid measurement errors caused by improper installation; use professional installation tools and fixing devices to ensure that the flow meter is firmly connected to the pipeline to prevent vibration and loosening from affecting the measurement accuracy;

[0064] Data analysis module: Based on the collected monitoring data, analyze the difference between the supply water flow and the return water flow to obtain the flow trend value, analyze and generate the flow trend signal, analyze the change trend of the return water pipe temperature to obtain the temperature trend value, and analyze and generate the temperature trend signal; based on the flow trend value and the temperature trend value, conduct comprehensive analysis to obtain the change coordination signal;

[0065] In some specific embodiments, sum the supply water pipe flow and the return water pipe flow obtained at the same time and take the average value to obtain the flow average value. Based on the obtained difference between the supply water flow and the return water flow and the flow average value, perform ratio processing to obtain the flow difference LC, and compare the flow difference with the flow difference threshold;

[0066] If the flow difference is greater than or equal to the flow difference threshold LC1, generate a flow emergency alarm signal;

[0067] If the flow difference is less than or equal to the flow difference threshold LC0, generate a flow emergency alarm signal;

[0068] If the flow difference is less than the flow difference threshold LC1 and greater than the flow difference threshold LC0, generate a flow monitoring analysis signal and conduct analysis;

[0069] It should be noted that both the flow difference threshold LC0 and the flow difference threshold LC1 are summarized by those skilled in the professional technology of the present invention through historical experience and can be adjusted according to the actual situation;

[0070] For the flow difference calculated by real-time monitoring, based on the flow difference data of the nearest 5 sampling points, through the formula calculate the linear regression slope k, where n is the time window length, t i is the time serial number, and LC i is the i-th flow difference;

[0071] It should be noted that the time window length n represents the acquisition duration required for 5 sampling points;

[0072] Analyze the obtained linear regression slope k LC If |k LC |>k th , it indicates that the change trend of the flow difference accelerates, and it is marked as a flow difference increase signal;

[0073] Calculate the number of consecutive occurrences of the flow difference increase signal to obtain the flow trend value. If the flow difference trend value is greater than or equal to 3, it indicates that there is an abnormal risk in the difference between the supply water flow and the return water flow, and a flow warning signal is generated; if the flow difference trend value is less than 3, no signal is generated;

[0074] Based on the obtained return pipe temperature, compare the return pipe temperature with the return pipe temperature threshold; if the return pipe temperature is greater than or equal to the return pipe temperature threshold HW0, generate a temperature emergency alarm signal; if the return pipe temperature is less than the return pipe temperature threshold HW0, generate a temperature monitoring and analysis signal;

[0075] Based on the obtained temperature monitoring and analysis signal, calculate the linear regression slope k of the return pipe temperature using the linear regression method WD , for the obtained linear regression slope k WD conduct an analysis. If k WD >k tm , it indicates that the temperature change trend is accelerating, and it is marked as a temperature increase signal;

[0076] Calculate the number of consecutive occurrences of the temperature increase signal to obtain the temperature trend value. If the temperature trend value is greater than or equal to 3, it indicates that there is an abnormal risk in the return water temperature change, and generate a temperature warning signal; if the temperature trend value is less than 3, do not generate it;

[0077] Based on the obtained flow trend value and temperature trend value, conduct a comprehensive analysis to obtain a change coordination signal. If the flow difference trend value is greater than or equal to 3 and the temperature trend value is greater than or equal to 3, it indicates that there are risks of water leakage and weakened cooling effect in the tuyere small sleeve, and generate a leakage and high temperature warning signal; if the flow difference trend value is less than 3 and the temperature trend value is greater than or equal to 3, it indicates that there is a risk of weakened cooling effect in the tuyere small sleeve, and generate a high temperature warning signal; if the flow difference trend value is greater than or equal to 3 and the temperature trend value is less than 3, it indicates that there is a risk of water leakage in the tuyere small sleeve, and generate a leakage warning signal;

[0078] Safety warning module: Based on the received alarm signals, the alarm signals include: leakage and high temperature warning signal, high temperature warning signal, leakage warning signal, flow emergency alarm signal and temperature emergency alarm signal, analyze the safety situation of the tuyere small sleeve;

[0079] In some specific embodiments, as Figure 4 shown, based on the obtained leakage and high temperature warning signal, the flow difference H alarm indicator light and the temperature H alarm indicator light flash and send out a warning message; based on the obtained high temperature warning signal, the temperature H alarm indicator light flashes and sends out a warning message; based on the obtained leakage warning signal, the flow difference H alarm indicator light flashes and sends out a warning message; based on the obtained flow emergency alarm signal, the flow difference H alarm indicator light changes color and stays on and sends out an alarm message; based on the obtained temperature emergency alarm signal, the temperature H alarm indicator light changes color and stays on and sends out an alarm message;

[0080] The technical solution of the embodiment of the present invention is as follows: Clean and smooth the time series of monitoring data, remove outliers and noise, so that the displayed data has reliability and analysis value. By analyzing multiple key indicators such as the difference between the supply and return water flow rates, the flow trend value, the return pipe temperature, and the temperature trend value, accurately identify the potential risks of the tuyere small sleeve; judge the risks of water leakage and weakened cooling effect, distinguish different risk levels, and issue accurate early warnings in a timely manner; adjust key parameters according to the actual situation and historical experience to make the system adapt to different working environments and requirements. According to different alarm signals, corresponding alarm indicator light states and information prompts are provided to intuitively and quickly understand the safety status of the tuyere small sleeve.

[0081] The above has described an embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention; all equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A water supply and return system for a tuyere small sleeve, characterized in that, It includes the following modules: System debugging module: Analyze the detection data of the flowmeter and temperature sensor, calibrate and debug the flowmeter and temperature sensor, check the accuracy of the output signals of the flowmeter and temperature sensor, and adjust the flowmeter and temperature sensor with deviations exceeding the expected range; Data collection module: Based on the flowmeter and temperature sensor after debugging and calibration, analyze and obtain the monitoring data of the tuyere sleeve; Data analysis module: Based on the collected monitoring data, analyze to obtain the flow trend value, generate a flow trend signal, analyze the temperature of the return water pipe to obtain the temperature trend value, and generate a temperature trend signal; Conduct comprehensive analysis to obtain a change coordination signal; Safety warning module: Analyze the safety status of the tuyere sleeve based on the received alarm signal.

2. The water supply and return system for the tuyere small sleeve according to claim 1, characterized in that, The method for obtaining the flow deviation ratio is as follows: Calibrate the zero point of the flowmeter, and introduce different calibrated standard flows based on the standard flow calibration device. For the water supply with the same calibrated standard flow, obtain the readings of the flowmeter to be adjusted multiple times. Divide the detection period into multiple detection sub-periods, and obtain the readings of the flowmeter to be adjusted at the end of the detection sub-period; Based on the obtained readings of the flowmeter to be adjusted, perform a difference process on the readings of the flowmeter to be adjusted and the standard flow calibrated by the standard flow calibration device to obtain the flow deviation; Perform a ratio process on the flow deviation and the corresponding standard flow to obtain the flow deviation ratio.

3. The water supply and return system of a tuyere sleeve according to claim 1, wherein Based on the obtained flow deviation ratio, take the absolute value process to obtain the flow deviation value. Compare the obtained flow deviation value with the preset flow deviation threshold, analyze to obtain a preliminary qualified flowmeter that meets the expectations, and calculate the average flow deviation ratio.

4. A supply and return water system for a tuyere small sleeve according to claim 3, characterized in that The process for obtaining the average flow deviation ratio is as follows: Based on the initially qualified flow meters obtained, obtain the readings of the initially qualified flow meters, calculate the flow deviation ratio, and group them. Divide the readings of the initially qualified flow meters obtained under the same standard flow into the same group of data, and calculate the average flow deviation ratio μ of the readings of the initially qualified flow meters in the same group through the formula 组 , and calculate the average flow deviation ratio μ of all the readings of the initially qualified flow meters 总 .

5. The water supply and return system for tuyere small sleeve according to claim 1, characterized in that, The detection process of the flowmeter is as follows: Based on the calculated average flow deviation ratio μ of all preliminary qualified flow meter readings 总 , through the formula Calculate the overall coefficient of variation CV of all flow deviation ratios 总 , where m i is the flow deviation ratio of each group of preliminary qualified flow meter readings, s ij is the flow deviation ratio of the initial qualified flow meter reading, μ 总i is the average flow deviation ratio of each group of preliminary qualified flow meter readings, and n is the number of groups; Based on the calculated overall coefficient of variation CV 总 , compare the overall coefficient of variation with the preset coefficient of variation CV0, and analyze and judge whether the initially qualified flowmeter needs to be debugged and classified; Based on the qualified flowmeters to be adjusted obtained by partitioning, through the formula calculate the coefficient of variation of each group CV 组 , where m i is the quantity of flow deviation ratios of the readings of the qualified flowmeters to be adjusted in each group, s ij is the flow deviation ratio of the readings of the qualified flowmeters to be adjusted, μ 组i is the average flow deviation ratio of the readings of the qualified flowmeters to be adjusted in each group, Q 标 is the calibrated standard flow rate; Based on the calculated coefficient of variation of groups CV 组 , the coefficient of variation of groups CV of the flowmeter to be adjusted and qualified 组 is compared with the preset coefficient of variation threshold CV1 to analyze and determine whether the flowmeter to be adjusted and qualified needs to be debugged and classified.

6. The water supply and return system for tuyere small sleeve according to claim 1, characterized in that The specific method of the data collection module is as follows: Transmit the real-time measured monitoring data to the data collector in the form of digital signals; Set the sampling period, read the monitoring data, and perform preliminary verification and processing. The data collector uploads the processed monitoring data in real time; The data collector performs analog-to-digital conversion and temperature calculation on the signal, and obtains the monitoring data according to the set sampling period; Based on the obtained flow of the water supply pipe and the flow of the water outlet pipe, perform a difference process on the flow of the water supply pipe and the flow of the water outlet pipe to obtain the water supply and return flow difference; Clean the time series data of the monitoring data, remove outliers and noise, and perform smoothing processing by the moving average method.

7. A supply and return water system for a tuyere small sleeve according to claim 1, characterized in that, The analysis process of the flow trend value is as follows: Sum and average the flow of the water supply pipe and the flow of the return water pipe obtained at the same time to obtain the flow average value. Based on the obtained water supply and return flow difference and the flow average value, perform a ratio process to obtain the flow difference LC. Compare the flow difference with the flow difference threshold; For the flow difference calculated by real-time monitoring, based on the flow difference data of the nearest 5 sampling points, through the formula calculate the linear regression slope k, where n is the time window length, t i is the time sequence number, LC i is the i-th flow difference; Analyze the obtained linear regression slope k LC If |k LC | > k th , it indicates that the changing trend of the flow difference accelerates, and it is marked as a signal of increasing flow difference; Calculate the number of consecutive occurrences of the flow difference increase signal to obtain the flow trend value, and analyze and generate a flow warning signal.

8. The water supply and return system for the tuyere small sleeve according to claim 1, characterized in that, The analysis process of the temperature trend value is as follows: Based on the obtained return pipe temperature, compare the return pipe temperature with the return pipe temperature threshold; if the return pipe temperature is greater than or equal to the return pipe temperature threshold HW0, generate a temperature emergency alarm signal; if the return pipe temperature is less than the return pipe temperature threshold HW0, generate a temperature monitoring and analysis signal; Based on the obtained temperature monitoring and analysis signals, use the linear regression method to calculate the linear regression slope k of the return water pipe temperature WD , and analyze the obtained linear regression slope k WD . If k WD >k tm , it indicates that the temperature change trend accelerates, and it is marked as a temperature increase signal; Calculate the number of consecutive occurrences of the temperature increase signal to obtain a temperature trend value, and analyze and generate a temperature warning signal.

9. The water supply and return system for the tuyere small sleeve according to claim 1, wherein, The method for obtaining the change coordination signal is as follows: Based on the obtained flow trend value and temperature trend value, perform comprehensive analysis to obtain a change coordination signal, and the change coordination signal includes: a leakage high temperature warning signal, a high temperature warning signal, and a leakage warning signal.

10. A supply and return water system for a tuyere small sleeve according to claim 1, characterized in that, The specific method of the safety warning module is as follows: Based on the received alarm signals, the alarm signals include: a leakage high temperature warning signal, a high temperature warning signal, a leakage warning signal, a flow emergency alarm signal, and a temperature emergency alarm signal, analyze the safety condition of the tuyere small sleeve.

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