Calculation method, device and equipment for air leakage rate of sintering machine and storage medium

Abstract

The embodiment of the invention provides a calculation method and device for the air leakage rate of a sintering machine, equipment and a storage medium, and relates to the field of sintering production. Judging whether the oxygen content of the large flue waste gas and the actual oxygen content of the standard air bellow are both lower than a preset threshold value or not, and if the oxygen content of the large flue waste gas and the oxygen content of the standard air bellow are both lower than the preset threshold value, calculating the actual average oxygen content according to the actual oxygen content of the standard air bellow and the sintering process parameters, and the air leakage rate of the sintering machine is calculated according to the oxygen content of the large flue waste gas, the standard value of the oxygen content of the air and the actual average oxygen content, so that the complexity of data acquisition is reduced, the labor cost is reduced, the working efficiency of the sintering machine is improved, and the accuracy of data is ensured by monitoring the sintering state in real time.

Description

Technical Field

[0001] The invention relates to the technical field of sintering production, and in particular to a calculation method, device, equipment and storage medium for the air leakage rate of a sintering machine. Background Art

[0002] In the sintering process of the steel industry, sintering operations have always been the core of the sintering process. Its production rhythm and operating efficiency directly affect the output, quality, energy consumption and other indicators of the sintering process. Negative pressure ventilation is usually used in the sintering process, that is, air passes through the mixture in the sintering trolley under the action of negative pressure to provide sufficient oxygen for the combustion of the fuel in the mixture. In actual operation, there will be a certain degree of air leakage in the side plates and slideways of the sintering machine, which will lead to a decrease in the effective air volume of the sintering trolley mixture, affecting the actual output and production energy efficiency of sintering.

[0003] In the current existing technology, the exhaust gas composition analysis method is usually used to indirectly obtain the leakage rate of the sintering machine by detecting the changes in a certain component in the exhaust gas before and after the equipment leaks, or by manually testing the leakage of each sintering bellows offline, and then calculating the leakage rate of the sintering machine. However, in the actual production process, the sintering machine has the problem of many bellows and many leakage points, resulting in a large amount of data to be detected, a complex detection process, and high labor costs. In addition, the change in the sintering state affects the detected value, which will lead to inaccurate calculation results. Therefore, there is an urgent need for a method that can calculate the leakage rate of a sintering machine in real time. Summary of the invention

[0004] In view of this, the purpose of the present invention is to overcome the shortcomings of the prior art, such as large amount of detection data, high labor cost and inaccurate calculation, and to provide a method, device, electronic device and readable storage medium for calculating the air leakage rate of a sintering machine.

[0005] The present invention provides the following technical solutions:

[0006] In a first aspect, a method for calculating the air leakage rate of a sintering machine is provided in an embodiment of the present disclosure, and the method comprises:

[0007] Collect the oxygen content of the flue gas of the sintering machine, the sintering process parameters and the actual oxygen content of the standard wind box;

[0008] Determine whether the oxygen content of the large flue exhaust gas and the actual oxygen content of the standard wind box are both lower than a preset threshold;

[0009] If the oxygen content of the large flue exhaust gas and the oxygen content of the standard wind box are both lower than the preset threshold, the actual average oxygen content is calculated according to the actual oxygen content of the standard wind box and the sintering process parameters;

[0010] The air leakage rate of the sintering machine is calculated according to the oxygen content of the flue exhaust gas, the standard value of the air oxygen content and the actual average oxygen content.

[0011] According to a specific embodiment disclosed in the present application, the step of collecting the oxygen content of the flue gas of the sintering machine, the sintering process parameters and the standard wind box oxygen content includes:

[0012] Installing a detector in each wind box of the sintering table to collect the sintering process parameters;

[0013] An oxygen content detector is installed at two-thirds of the sintering table to collect the actual oxygen content of the standard wind box;

[0014] An oxygen content detector is installed at the large flue of the sintering table to collect the oxygen content of the flue exhaust gas.

[0015] According to a specific embodiment disclosed in the present application, the step of calculating the actual average oxygen content according to the actual oxygen content of the standard wind box and the sintering process parameters includes:

[0016] The sintering process parameters include bellows temperature data, bellows pressure data and bellows oxygen content data, and quadratic curves are used to fit the bellows temperature data and the bellows oxygen content data respectively to obtain a temperature curve and an oxygen content curve;

[0017] The parabolic formula y=y1*[(x-x2)(x-x3) / (x1-x2)(x1-x3)]+y2*[(x-x3)(x-x1) / (x2-x3)(x2-x1)]+y3*[(x-x1)(x-x2) / (x3-x1)(x3-x2)] is used to calculate the actual oxygen content of the bellows in a specific interval, wherein y is the actual oxygen content of the bellows, x is the bellows number, (x1, y1) is the first oxygen content coordinate point, (x2, y2) is the actual oxygen content coordinate point of the standard bellows, and (x3, y3) is the second oxygen content coordinate point;

[0018] According to the air volume formula Calculating the actual air volume of the bellows in the specific interval, where Q is the actual air volume of the bellows, K is a constant, and P is the bellows pressure;

[0019] According to the average oxygen content formula AvgO2 = (Q3*V3+Q4*V4+…+Q 19 *V 19 ) / (Q3+Q4+…+Q 19 ) calculates the actual average oxygen content of the bellows in the specific interval, wherein Q is the actual air volume of the bellows and V is the actual oxygen content of the bellows.

[0020] According to a specific implementation method disclosed in the present application, the parabolic formula y=y1*

[0021] [(x-x2)(x-x3) / (x1-x2)(x1-x3)]+y2*[(x-x3)(x-x1) / (x2-x3)(x2-x1)]+y3*[(x-x1)(x-x2) / (x3-x1)(x3-x2)] The steps of calculating the actual oxygen content of the wind box in a specific interval include:

[0022] Calibrate the sintering machine in a specific interval according to the temperature curve;

[0023] A first oxygen content coordinate point and a second oxygen content coordinate point are selected according to the temperature curve, and the actual oxygen content of the bellows in a specific interval is calculated according to the first oxygen content coordinate point, the second oxygen content coordinate point and the actual oxygen content of the standard bellows.

[0024] According to a specific embodiment disclosed in the present application, the step of calculating the air leakage rate of the sintering machine according to the oxygen content of the flue gas, the standard value of the air oxygen content and the actual average oxygen content includes:

[0025] The air leakage rate is calculated using the formula L = (DaO2-AvgO2) / (O 2大气 -AvgO2)×100% to calculate the air leakage rate of the sintering machine, where DaO2 is the oxygen content of the flue gas, AvgO2 is the actual average oxygen content, O 2大气 It is the standard value of oxygen content in air.

[0026] According to a specific implementation method disclosed in the present application, the step of determining whether the oxygen content of the large flue exhaust gas and the actual oxygen content of the standard wind box are both lower than a preset threshold value includes:

[0027] If the large flue exhaust gas oxygen content and the standard wind box oxygen content are both higher than the preset threshold, the process returns to the step of collecting the large flue exhaust gas oxygen content of the sintering machine, sintering process parameters and the actual oxygen content of the standard wind box.

[0028] According to a specific embodiment disclosed in the present application, the step of installing an oxygen content detector at two-thirds of the sintering table to collect the actual oxygen content of the standard wind box includes:

[0029] The oxygen content detector is a zirconium oxide detector.

[0030] In a second aspect, an embodiment of the present disclosure provides a device for calculating the air leakage rate of a sintering machine, the device comprising:

[0031] The collection module is used to collect the oxygen content of the flue gas of the sintering machine, the sintering process parameters and the actual oxygen content of the standard wind box;

[0032] A judgment module, used to judge whether the oxygen content of the large flue exhaust gas and the actual oxygen content of the standard wind box are both lower than a preset threshold;

[0033] A first calculation module, for calculating the actual average oxygen content according to the actual oxygen content of the standard wind box and the sintering process parameters if the oxygen content of the large flue exhaust gas and the oxygen content of the standard wind box are both lower than the preset threshold value;

[0034] The second calculation module is used to calculate the air leakage rate of the sintering machine according to the oxygen content of the flue exhaust gas, the standard value of the air oxygen content and the actual average oxygen content.

[0035] In a third aspect, an electronic device is provided in an embodiment of the present disclosure, the electronic device comprising a memory and a processor, the memory storing a computer program, and the processor implementing the steps of the method for calculating the air leakage rate of a sintering machine described in any one of the first aspects when executing the computer program.

[0036] In a fourth aspect, a computer-readable storage medium is provided in an embodiment of the present disclosure, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for calculating the air leakage rate of a sintering machine described in any one of the first aspects are implemented.

[0037] The above-mentioned method for calculating the air leakage rate of a sintering machine provided in the present application collects the oxygen content of the large flue exhaust gas of the sintering machine, the sintering process parameters and the actual oxygen content of the standard wind box, and determines whether the oxygen content of the large flue exhaust gas and the actual oxygen content of the standard wind box are both lower than a preset threshold value. If the oxygen content of the large flue exhaust gas and the actual oxygen content of the standard wind box are both lower than the preset threshold value, the actual average oxygen content is calculated according to the actual oxygen content of the standard wind box and the sintering process parameters, and the air leakage rate of the sintering machine is calculated according to the oxygen content of the large flue exhaust gas, the standard value of the air oxygen content and the actual average oxygen content, which reduces the complexity of data collection, reduces labor costs, improves the working efficiency of the sintering machine, and ensures the accuracy of the data by real-time monitoring of the sintering status.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work. In each of the drawings, similar components are numbered similarly.

[0040] Figure 1 A schematic flow chart of a method for calculating the air leakage rate of a sintering machine provided in an embodiment of the present application is shown;

[0041] Figure 2 The schematic diagram of the structure of each detector provided in the embodiment of the present application is shown;

[0042] Figure 3 A schematic diagram of a temperature curve provided in an embodiment of the present application is shown;

[0043] Figure 4 A schematic diagram of an oxygen content curve provided in an embodiment of the present application is shown;

[0044] Figure 5 A schematic structural diagram of a device for calculating the air leakage rate of a sintering machine provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0046] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of the template are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0050] Example 1

[0051] Traditional methods for calculating sintering air leakage rate generally use empirical formula method and waste gas composition analysis method. The empirical formula method calculates by obtaining the effective air volume and leakage air volume of the equipment through empirical formula, but the effective air volume and leakage air volume cannot be monitored online. The waste gas composition analysis method indirectly obtains the air leakage rate of the sintering machine by detecting the changes in certain components in the exhaust gas before and after the sintering machine leaks. At present, there are many sintering machine bellows and many leakage points, which leads to the need for huge test data and the need for manual offline detection of the air leakage rate of each sintering machine, which not only consumes manpower and material resources but also reduces the sintering efficiency.

[0052] The invention provides a method for calculating the air leakage rate of a sintering machine. The air leakage rate of the sintering machine can be calculated by collecting the oxygen content of the large flue of the sintering machine, the actual oxygen content of the standard wind box and the wind pressure data.

[0053] See also Figure 1 , Figure 1 The following is a flow chart of a method for calculating the air leakage rate of a sintering machine provided in an embodiment of the present application. Figure 1 As shown, the method includes:

[0054] Step S101, collecting the oxygen content of the flue gas of the sintering machine, the sintering process parameters and the actual oxygen content of the standard wind box.

[0055] In one embodiment, the step of collecting the oxygen content of the flue gas of the sintering machine, the sintering process parameters and the standard wind box oxygen content includes:

[0056] Installing a detector in each wind box of the sintering table to collect the sintering process parameters;

[0057] An oxygen content detector is installed at two-thirds of the sintering table to collect the actual oxygen content of the standard wind box;

[0058] An oxygen content detector is installed at the large flue of the sintering table to collect the oxygen content of the flue exhaust gas.

[0059] Furthermore, the step of installing an oxygen content detector at two-thirds of the sintering table to collect the actual oxygen content of the standard wind box includes:

[0060] The oxygen content detector is a zirconium oxide detector.

[0061] It can be understood that the zirconia oxygen meter is made of a zirconia sample sensor. The material of the zirconia sample sensor is a zirconia solid electrolyte, which is a stable zirconia ceramic sintered body sintered in a high temperature environment by adding yttrium oxide or calcium oxide to pure zirconia. Porous platinum electrodes are sintered on both sides of the zirconia electrolyte. At a certain temperature, when the oxygen concentration on both sides of the electrolyte is different, the oxygen molecules on the high concentration side (air) are adsorbed on the platinum electrode and combined with electrons to form oxygen ions, making the electrode positively charged. The oxygen ions migrate to the platinum electrode on the low oxygen concentration side through the oxygen ion vacancies in the electrolyte to release electrons and convert into oxygen molecules, making the electrode negatively charged. In this way, a certain electromotive force is generated between the two electrodes. The measured gas and the reference gas flow through the two sides of the zirconia tube respectively, and the generated electromotive force has a fixed relationship with the working temperature of the zirconia tube and the oxygen concentration on both sides. If the concentration of the reference gas is known, the oxygen concentration of the measured gas can be calculated based on the oxygen potential on both sides of the zirconia tube and the working temperature of the zirconia tube.

[0062] Specifically, see Figure 2 The main detection points of the zirconia oxygen meter include the large flue of the sintering machine and the inside of the bellows at two-thirds of the sintering table. During the sintering process, when the material is moved to two-thirds of the sintering table, the sintering effect is better, and the oxygen content data inside the bellows corresponding to this position is the most accurate. The inside of the sintering machine bellows has the characteristics of high dust, large particles, high negative pressure and high moisture content. Therefore, when installing the zirconia oxygen meter, it needs to be installed in the middle near the bottom of the trolley to ensure that the measured oxygen is the oxygen content directly below the trolley and ensure the accuracy of the data.

[0063] The detector includes a thermocouple sensor and a pressure pipe. Multiple groups of thermocouples of different lengths are inserted on both sides of the sintering machine wind box for temperature detection, so as to understand the sintering state of the sintering machine. A hole is opened on one side of the sintering machine wind box to install the pressure pipe, which extends in a horizontal direction. The pressure pipe transmits the pressure to the pressure transmitter through the pressure transmission pipe for pressure measurement.

[0064] Step S102, determining whether the oxygen content of the large flue exhaust gas and the actual oxygen content of the standard wind box are both lower than a preset threshold.

[0065] In one embodiment, the step of determining whether the oxygen content of the large flue exhaust gas and the actual oxygen content of the standard wind box are both lower than a preset threshold value comprises:

[0066] If the large flue exhaust gas oxygen content and the standard wind box oxygen content are both higher than the preset threshold, the process returns to the step of collecting the large flue exhaust gas oxygen content of the sintering machine, sintering process parameters and the actual oxygen content of the standard wind box.

[0067] It is understandable that there are problems such as insufficient sintering and air leakage during the sintering process. Therefore, in order to ensure the accuracy of the collected data, the oxygen content of the large flue exhaust gas and the actual oxygen content of the standard wind box collected are judged. The preset threshold can be the average value of the oxygen content of the large flue exhaust gas and the actual oxygen content of the standard wind box detected from multiple batches of the same material with a good sintering state, and 16.5% is used in this embodiment.

[0068] Step S103: if the oxygen content of the flue gas and the oxygen content of the standard wind box are both lower than the preset threshold, the actual average oxygen content is calculated according to the actual oxygen content of the standard wind box and the sintering process parameters.

[0069] In one embodiment, the step of calculating the actual average oxygen content according to the actual oxygen content of the standard wind box and the sintering process parameters comprises:

[0070] The sintering process parameters include bellows temperature data, bellows pressure data and bellows oxygen content data, and quadratic curves are used to fit the bellows temperature data and the bellows oxygen content data respectively to obtain a temperature curve and an oxygen content curve;

[0071] The parabolic formula y=y1*[(x-x2)(x-x3) / (x1-x2)(x1-x3)]+y2*[(x-x3)(x-x1) / (x2-x3)(x2-x1)]+y3*[(x-x1)(x-x2) / (x3-x1)(x3-x2)] is used to calculate the actual oxygen content of the bellows in a specific interval, wherein y is the actual oxygen content of the bellows, x is the bellows number, (x1, y1) is the first oxygen content coordinate point, (x2, y2) is the actual oxygen content coordinate point of the standard bellows, and (x3, y3) is the second oxygen content coordinate point;

[0072] According to the air volume formula Calculating the actual air volume of the bellows in the specific interval, where Q is the actual air volume of the bellows, K is a constant, and P is the bellows pressure;

[0073] According to the average oxygen content formula AvgO2 = (Q3*V3+Q4*V4+…+Q 19 *V 19 ) / (Q3+Q4+…+Q 19) calculates the actual average oxygen content of the bellows in the specific interval, wherein Q is the actual air volume of the bellows and V is the actual oxygen content of the bellows.

[0074] Specifically, see Figure 3 and Figure 4 , Figure 3 The temperature curve provided in the embodiment of the present application is: Figure 4 The oxygen content curve provided in the embodiment of the present application can determine the sintering state of the sintering machine by analyzing the temperature curve and the oxygen content curve, and can calibrate the specific interval according to the sintering state to calculate the accurate air leakage rate of the sintering machine. The sintering process parameters are the previous sintering data of the sintering machine collected by various detectors, and the actual oxygen content of the standard wind box is the actual oxygen content detected by the oxygen content detector during the sintering process.

[0075] In one embodiment, the step of calculating the actual oxygen content of the wind box in a specific interval using the parabolic formula y=y1*[(x-x2)(x-x3) / (x1-x2)(x1-x3)]+y2*[(x-x3)(x-x1) / (x2-x3)(x2-x1)]+y3*[(x-x1)(x-x2) / (x3-x1)(x3-x2)] comprises:

[0076] Calibrate the sintering machine in a specific interval according to the temperature curve;

[0077] A first oxygen content coordinate point and a second oxygen content coordinate point are selected according to the temperature curve, and the actual oxygen content of the bellows in a specific interval is calculated according to the first oxygen content coordinate point, the second oxygen content coordinate point and the actual oxygen content of the standard bellows.

[0078] It can be understood that the temperature curve of the sintering machine represents the sintering production state. The temperature curve can be used to calibrate the interval with good sintering state in the sintering machine, and the first oxygen content coordinate point and the second oxygen content coordinate point are selected through the temperature curve to improve the accuracy of the data. In the first oxygen content coordinate point (x1, y1), x1 is the bellows number corresponding to the coordinate point, y1 is the bellows oxygen content corresponding to the coordinate point, in the second oxygen content coordinate point (x3, y3), x3 is the bellows number corresponding to the coordinate point, y3 is the bellows oxygen content corresponding to the coordinate point, in the standard bellows actual oxygen content (x2, y2), x2 is the bellows number corresponding to the coordinate point, that is, the bellows number at two-thirds of the sintering machine, y2 is the actual oxygen content of the bellows corresponding to the coordinate point, for example, the first oxygen content coordinate point is (3, 5.2), and the second oxygen content coordinate point is (19, 19.7).

[0079] Step S104, calculating the air leakage rate of the sintering machine according to the oxygen content of the flue exhaust gas, the standard value of the air oxygen content and the actual average oxygen content.

[0080] In one embodiment, the step of calculating the air leakage rate of the sintering machine according to the large flue exhaust gas oxygen content, the standard value of air oxygen content and the actual average oxygen content comprises:

[0081] The air leakage rate is calculated using the formula L = (DaO2-AvgO2) / (O 2大气 -AvgO2)×100% to calculate the air leakage rate of the sintering machine, where DaO2 is the oxygen content of the flue gas, AvgO2 is the actual average oxygen content, O 2大气 It is the standard value of oxygen content in air.

[0082] The present application provides a method for calculating the air leakage rate of a sintering machine. By collecting the oxygen content of the flue gas of the sintering machine, the sintering process parameters and the actual oxygen content of the standard wind box, it is determined whether the oxygen content of the flue gas and the actual oxygen content of the standard wind box are both lower than a preset threshold value. If the oxygen content of the flue gas and the actual oxygen content of the standard wind box are both lower than the preset threshold value, the actual average oxygen content is calculated according to the actual oxygen content of the standard wind box and the sintering process parameters. The air leakage rate of the sintering machine is calculated according to the oxygen content of the flue gas, the standard value of the air oxygen content and the actual average oxygen content. The actual air leakage rate of the sintering machine can be calculated only by using the sintering process parameters of the sintering machine, the oxygen content of the flue gas and the actual oxygen content of the standard wind box. The sintering machine can be better controlled according to the actual air leakage rate, which reduces the complexity of data collection, reduces labor costs, improves the working efficiency of the sintering machine, and ensures the accuracy of the data by real-time monitoring of the sintering status.

[0083] Example 2

[0084] like Figure 5 As shown, the embodiment of the present application further discloses a structural schematic diagram of a device 500 for calculating the air leakage rate of a sintering machine, and the device 500 for calculating the air leakage rate of a sintering machine includes:

[0085] The collection module 501 is used to collect the oxygen content of the flue gas of the sintering machine, the sintering process parameters and the actual oxygen content of the standard wind box;

[0086] A judgment module 502 is used to judge whether the oxygen content of the large flue exhaust gas and the actual oxygen content of the standard wind box are both lower than a preset threshold;

[0087] A first calculation module 503 is used to calculate the actual average oxygen content according to the actual oxygen content of the standard wind box and the sintering process parameters if the oxygen content of the large flue exhaust gas and the oxygen content of the standard wind box are both lower than the preset threshold value;

[0088] The second calculation module 504 is used to calculate the air leakage rate of the sintering machine according to the oxygen content of the flue exhaust gas, the standard value of the air oxygen content and the actual average oxygen content.

[0089] The device 500 for calculating the air leakage rate of a sintering machine provided in this embodiment can implement the method for calculating the air leakage rate of a sintering machine shown in Embodiment 1, which will not be described again to avoid repetition.

[0090] The device for calculating the air leakage rate of a sintering machine provided in the embodiment of the present application collects the oxygen content of the flue gas of the sintering machine, the sintering process parameters and the actual oxygen content of the standard wind box, and determines whether the oxygen content of the flue gas and the actual oxygen content of the standard wind box are both lower than a preset threshold value. If the oxygen content of the flue gas and the actual oxygen content of the standard wind box are both lower than the preset threshold value, the actual average oxygen content is calculated according to the actual oxygen content of the standard wind box and the sintering process parameters, and the air leakage rate of the sintering machine is calculated according to the oxygen content of the flue gas, the standard value of the air oxygen content and the actual average oxygen content, thereby reducing the complexity of data collection, reducing labor costs, improving the working efficiency of the sintering machine, and ensuring the accuracy of the data by real-time monitoring of the sintering status.

[0091] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and structure diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or the flow chart, and the combination of boxes in the structure diagram and / or the flow chart, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0092] In addition, the functional modules or units in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0093] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0094] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for calculating the air leakage rate of a sintering machine, characterized in that: The method comprises: Collect the oxygen content of the flue gas of the sintering machine, the sintering process parameters and the actual oxygen content of the standard wind box; Determine whether the oxygen content of the large flue exhaust gas and the actual oxygen content of the standard wind box are both lower than a preset threshold; If the oxygen content of the large flue exhaust gas and the oxygen content of the standard wind box are both lower than the preset threshold, the actual average oxygen content is calculated according to the actual oxygen content of the standard wind box and the sintering process parameters; The air leakage rate of the sintering machine is calculated according to the oxygen content of the flue exhaust gas, the standard value of the air oxygen content and the actual average oxygen content.

2. The method for calculating the air leakage rate of a sintering machine according to claim 1, characterized in that: The step of collecting the oxygen content of the flue gas of the sintering machine, the sintering process parameters and the standard wind box oxygen content includes: Installing a detector in each wind box of the sintering table to collect the sintering process parameters; An oxygen content detector is installed at two-thirds of the sintering table to collect the actual oxygen content of the standard wind box; An oxygen content detector is installed at the large flue of the sintering table to collect the oxygen content of the flue exhaust gas.

3. The method for calculating the air leakage rate of a sintering machine according to claim 1, characterized in that: The step of calculating the actual average oxygen content according to the actual oxygen content of the standard wind box and the sintering process parameters comprises: The sintering process parameters include bellows temperature data, bellows pressure data and bellows oxygen content data, and quadratic curves are used to fit the bellows temperature data and the bellows oxygen content data respectively to obtain a temperature curve and an oxygen content curve; The parabolic formula y=y1*[(x-x2)(x-x3) / (x1-x2)(x1-x3)]+y2*[(x-x3)(x-x1) / (x2-x3)(x2-x1)]+y3*[(x-x1)(x-x2) / (x3-x1)(x3-x2)] is used to calculate the actual oxygen content of the bellows in a specific interval, wherein y is the actual oxygen content of the bellows, x is the bellows number, (x1, y1) is the first oxygen content coordinate point, (x2, y2) is the actual oxygen content coordinate point of the standard bellows, and (x3, y3) is the second oxygen content coordinate point; According to the air volume formula Calculating the actual air volume of the bellows in the specific interval, where Q is the actual air volume of the bellows, K is a constant, and P is the bellows pressure; According to the average oxygen content formula AvgO2 = (Q3*V3+Q4*V4+…+Q 19 *V 19 ) / (Q3+Q4+…+Q 19 ) calculates the actual average oxygen content of the bellows in the specific interval, wherein Q is the actual air volume of the bellows and V is the actual oxygen content of the bellows.

4. The method for calculating the air leakage rate of a sintering machine according to claim 3, characterized in that: The step of using the parabolic formula y=y1*[(x-x2)(x-x3) / (x1-x2)(x1-x3)]+y2*[(x-x3)(x-x1) / (x2-x3)(x2-x1)]+y3*[(x-x1)(x-x2) / (x3-x1)(x3-x2)] to calculate the actual oxygen content of the wind box in a specific interval includes: Calibrate the sintering machine in a specific interval according to the temperature curve; A first oxygen content coordinate point and a second oxygen content coordinate point are selected according to the temperature curve, and the actual oxygen content of the bellows in a specific interval is calculated according to the first oxygen content coordinate point, the second oxygen content coordinate point and the actual oxygen content of the standard bellows.

5. The method for calculating the air leakage rate of a sintering machine according to claim 1, characterized in that: The step of calculating the air leakage rate of the sintering machine according to the oxygen content of the flue exhaust gas, the standard value of the air oxygen content and the actual average oxygen content comprises: The air leakage rate is calculated using the formula L = (DaO2-AvgO2) / (O 2大气 -AvgO2)×100% to calculate the air leakage rate of the sintering machine, where DaO2 is the oxygen content of the flue gas, AvgO2 is the actual average oxygen content, O 2大气 It is the standard value of oxygen content in air.

6. The method for calculating the air leakage rate of a sintering machine according to claim 1, characterized in that: The step of judging whether the oxygen content of the large flue exhaust gas and the actual oxygen content of the standard wind box are both lower than a preset threshold value comprises: If the large flue exhaust gas oxygen content and the standard wind box oxygen content are both higher than the preset threshold, the process returns to the step of collecting the large flue exhaust gas oxygen content of the sintering machine, sintering process parameters and the actual oxygen content of the standard wind box.

7. The method for calculating the air leakage rate of a sintering machine according to claim 2, characterized in that: The step of installing an oxygen content detector at two-thirds of the sintering table to collect the actual oxygen content of the standard wind box includes: The oxygen content detector is a zirconium oxide detector.

8. A device for calculating the air leakage rate of a sintering machine, characterized in that: The device comprises: The collection module is used to collect the oxygen content of the flue gas of the sintering machine, the sintering process parameters and the actual oxygen content of the standard wind box; A judgment module, used to judge whether the oxygen content of the large flue exhaust gas and the actual oxygen content of the standard wind box are both lower than a preset threshold; A first calculation module, for calculating the actual average oxygen content according to the actual oxygen content of the standard wind box and the sintering process parameters if the oxygen content of the large flue exhaust gas and the oxygen content of the standard wind box are both lower than the preset threshold value; The second calculation module is used to calculate the air leakage rate of the sintering machine according to the oxygen content of the flue exhaust gas, the standard value of the air oxygen content and the actual average oxygen content.

9. An electronic device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method for calculating the air leakage rate of a sintering machine according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for calculating the air leakage rate of a sintering machine according to any one of claims 1 to 7 are implemented.

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