Method and system for controlling sinter fuel particle size

Abstract

The application provides a sintering fuel particle size control method and system. The control method comprises the following steps: obtaining a basic parameter; calculating an optimal particle size interval value of the fuel according to the basic parameter; obtaining an average value of the fuel particle size at the current moment; and generating a first control strategy for adjusting a first roll gap system parameter of a four-roll crusher according to the optimal particle size interval value of the fuel and the average value of the fuel particle size at the current moment, wherein the first roll gap system parameter is the distance between the upper two rollers and the distance between the lower two rollers in the four-roll crusher. Through the above method and system, online and real-time accurate control of the fuel particle size is realized, the fuel consumption is reduced, the cost is saved, the fuel particle size control is more stable, the fluctuation of the sinter ore production quality is avoided, and the production is stabilized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sintering machines, in particular to a sintering fuel particle size control method and system. BACKGROUND

[0002] Sinter is an important raw material in blast furnace production, and the preparation process includes blast furnace return ore, sinter return ore, mixed ore, fuel and flux according to a certain proportion, adding an appropriate amount of moisture for mixing and granulation, and then baking into sinter finished ore on a sintering machine. The main role of fuel in the process of iron ore sintering is to provide the heat and atmosphere required for sintering, which has a great influence on the yield and quality of sintered ore. The sintering fuel used in the sintering process is mainly coke powder and anthracite powder. The fuel particle size plays a key role in the sintering process and the quality and energy consumption of sintering. If the fuel particle size of sintering fuel is too large or too small, the amount of sintering fuel will increase, the energy consumption of sintering fuel will increase, and the sintering quality will deteriorate.

[0003] Sintering fuel particle size control is mainly achieved through two devices, a pair of roller crushers and a four-roller crusher. First, the sintering fuel is crushed to less than 10mm by the pair of roller crushers, and then the fuel is crushed to less than 3mm by the four-roller crusher. The control of fuel particle size is achieved by adjusting the upper and lower two-roller gap values of the four-roller crusher to accurately control the fuel particle size.

[0004] Currently, fuel particle size control relies on manual sampling and manual screening of crushed fuel samples to obtain fuel particle size composition distribution values and calculate the average particle size of the fuel. The upper and lower two-roller gap values of the four-roller crusher are manually adjusted according to whether the average particle size is within the optimal range of the fuel average particle size. Currently, the adjustment of the four-roller gap value relies on manual experience to insert multiple 0.5mm shims between the two rollers to adjust the roller gap value. This method is time-consuming and labor-intensive. The method of adjusting the roller gap value by relying on manual experience has the problems of low automation, low efficiency, long adjustment time, and inaccurate fuel particle size control. SUMMARY

[0005] The present application provides a sintering fuel particle size control method and system to solve the problems of inaccurate and low efficiency of sintering fuel particle size control.

[0006] In a first aspect, the present application provides a sintering fuel particle size control method, which comprises:

[0007] obtaining basic parameters, the basic parameters including thermal state information of a sinter cake section, fuel-related process operation parameters, a yield of sinter and a quality history data of the sinter, wherein the fuel-related process operation parameters include a fuel ratio, a coke powder ratio, a coal powder ratio, a layer thickness, a comprehensive conveying amount and a sintering machine speed;

[0008] calculating an optimal particle size interval value of the fuel according to the basic parameters;

[0009] obtaining an average value of fuel particle size at a current time;

[0010] generating a first control strategy for adjusting a first roll gap parameter of a four-roll crusher according to the optimal particle size interval value of the fuel and the average value of fuel particle size at the current time, the first roll gap parameter being a distance between upper two rollers and a distance between lower two rollers in the four-roll crusher.

[0011] Preferably, the obtaining of the average value of fuel particle size at the current time comprises:

[0012] obtaining a particle size of fuel at the current time, classifying the fuel at the current time according to the size of the particle size, and measuring a weight value of each level of fuel;

[0013] calculating a distribution of fuel particle size according to the weight value corresponding to each level of fuel;

[0014] calculating the average value of fuel particle size at the current time according to the distribution of fuel particle size.

[0015] Preferably, the control method further comprises:

[0016] generating a second control strategy for adjusting a second roll gap parameter of a pair of roll crushers according to the optimal particle size interval value of the fuel and the average value of fuel particle size at the current time, the second roll gap parameter being a distance between two rollers of the pair of roll crushers.

[0017] Preferably, the generating of the first control strategy for adjusting the first roll gap parameter of the four-roll crusher comprises:

[0018] determining whether the average value of fuel particle size at the current time is greater than a first preset value:

[0019] if yes, generating a first control instruction for reducing the first roll gap parameter, and the four-roll crusher reduces the distance between the upper two rollers and / or the distance between the lower two rollers according to the first control instruction;

[0020] if no, determining whether the average value of fuel particle size at the current time is less than a second preset value, the second preset value being less than the first preset value;

[0021] If yes, a second control instruction for increasing the first roller gap parameter is generated, and the four-roller crusher increases the distance between the upper two rollers and / or the distance between the lower two rollers according to the second control instruction.

[0022] Preferably, the generating the second control strategy for adjusting the four-roller crusher gap value comprises:

[0023] When the average value of the fuel particle size at the current time is greater than a first preset value, a third control instruction for reducing the second roller gap parameter is generated;

[0024] When the average value of the fuel particle size at the current time is less than a second preset value, a fourth control instruction for increasing the second roller gap parameter is generated.

[0025] In a second aspect, the present application also provides a sintering fuel particle size control system, which comprises:

[0026] An optimal average particle size analysis module is configured to obtain an optimal particle size interval value of the fuel;

[0027] A fuel average particle size calculation module is configured to obtain an average value of the fuel particle size at the current time;

[0028] A fuel particle size control module is configured to generate a first control strategy for adjusting a first roller gap parameter of a four-roller crusher according to the optimal particle size interval value of the fuel and the average value of the fuel particle size at the current time, the first roller gap parameter being the distance between the upper two rollers and the distance between the lower two rollers in the four-roller crusher;

[0029] A fuel particle size control execution module comprises the four-roller crusher and a four-roller crusher intelligent control unit. The four-roller crusher intelligent control unit is configured to receive the first control strategy sent by the fuel particle size control module, the first control strategy comprising a plurality of control instructions, and drive the four-roller crusher to automatically adjust the first roller gap parameter according to the first control strategy.

[0030] Preferably, the fuel average particle size calculation module comprises a fuel particle size distribution acquisition unit and a fuel average particle size calculation unit;

[0031] The fuel particle size distribution acquisition unit is configured to:

[0032] classify the fuel at the current time according to different particle sizes, and measure the weight value of each level of fuel;

[0033] calculate the distribution of the fuel particle size according to the weight value corresponding to each level of fuel;

[0034] The fuel average particle size calculation unit is configured to calculate the average value of the fuel particle size at the current time according to the distribution of the fuel particle size.

[0035] Preferably, the optimal average particle size analysis module comprises a parameter acquisition unit and an intelligent calculation unit.

[0036] The parameter acquisition unit is configured to acquire basic parameters, wherein the basic parameters comprise thermal state information of a sinter cake cross section, fuel-related process operation parameters, a sinter output, and sinter quality historical data, and the fuel-related process operation parameters comprise fuel ratio, coke powder ratio, coal powder ratio, bed thickness, comprehensive conveying capacity, and sintering machine speed.

[0037] The intelligent calculation unit is configured to import the basic parameters into a fuel optimal average particle size control model for fusion calculation processing to obtain an optimal particle size interval value of the fuel.

[0038] Preferably, the fuel particle size control execution module further comprises a pair roller crusher intelligent control unit and a pair roller crusher.

[0039] The pair roller crusher intelligent control unit is configured to receive a second control strategy sent by the fuel particle size control module and send the second control strategy to the four-roller crusher and / or the pair roller crusher.

[0040] The fuel particle size control module is further configured to generate a second control strategy for adjusting a pair roller crusher gap value according to the optimal particle size interval value of the fuel and the average value of the fuel particle size at the current time, and the second control strategy comprises a plurality of control instructions.

[0041] The pair roller crusher is configured to automatically adjust a second roller gap parameter according to the second control strategy, and the second roller gap parameter is a distance between two rollers of the pair roller crusher.

[0042] Preferably, the fuel particle size control module is further configured to:

[0043] determine whether the average value of the fuel particle size at the current time is greater than a first preset value;

[0044] if yes, generate a first control instruction for reducing the first roller gap parameter, or generate a third control instruction for reducing the second roller gap parameter, and send the first control instruction or the third control instruction to the fuel particle size control execution module;

[0045] if no, determine whether the average value of the fuel particle size at the current time is less than a second preset value, and the first preset value is greater than the second preset value.

[0046] If yes, a second control instruction for increasing the first roll gap parameter is generated, or a fourth control instruction for increasing the second roll gap parameter is generated, and is sent to the fuel particle size control execution module;

[0047] The fuel particle size control execution module is further configured to:

[0048] According to the first control instruction or the third control instruction, the distance between the upper two rollers and / or the distance between the lower two rollers is reduced, or the distance between the two rollers of the roll crusher is reduced.

[0049] According to the second control instruction or the fourth control instruction, the distance between the upper two rollers and / or the distance between the lower two rollers is increased, or the distance between the two rollers of the roll crusher is increased.

[0050] The present application provides a sinter fuel particle size control method and system, the control method comprises obtaining basic parameters, the basic parameters include the thermal state information of the sinter cake cross section, the fuel related process operation parameters, the yield of sinter and the quality history data of sinter, wherein the fuel related process operation parameters include fuel ratio, coke powder ratio, coal powder ratio, layer thickness, comprehensive conveying capacity and belt conveyor running speed; the optimal particle size interval value of the fuel is calculated according to the basic parameters; the average value of the fuel particle size at the current time is obtained; the first control strategy for adjusting the first roll gap parameter of the four-roll crusher is generated according to the optimal particle size interval value of the fuel and the average value of the fuel particle size at the current time, the first roll gap parameter is the distance between the upper two rollers and the distance between the lower two rollers in the four-roll crusher. Fuel average particle size calculation module fuel average particle size calculation module first roll gap parameter first roll gap parameter first roll gap parameter. Through the above method and system, the online and real-time accurate control of fuel particle size is realized, without human intervention; the fuel consumption is reduced, the production operation cost is saved; the fuel particle size control is more stable, the fluctuation of sinter yield and quality is avoided, and the production is stabilized. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed in the embodiments. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0052] Figure 1 The flowchart of the sinter fuel particle size control method of the present application;

[0053] Figure 2 The schematic diagram of the sinter fuel particle size control system of the present application;

[0054] Figure 3A device structure diagram of a sintering fuel particle size control system. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0056] Sintering fuel is a necessary material in industrial production, and the particle size of sintering fuel is an important factor affecting the quality of sintering fuel. The specific particle size affects the fuel as follows:

[0057] When the fuel particle size is too coarse (>3mm), the combustion zone will be widened, and the permeability of the material layer will be poor. The sintering fuel is unevenly distributed in the material layer, the large particles are over-melted around, and the places far from the large particles cannot be fully sintered. When the material is distributed, it is concentrated in the lower part of the material layer, and segregation is easy to occur, which causes insufficient fuel in the upper part of the material layer and excessive fuel in the lower part of the material layer. The insufficient fuel in the upper part of the material layer is easy to make the sintering ore structure loose and the strength poor. The excessive fuel in the lower part of the material layer makes the sintering zone wide in the sintering process, and the permeability of the material layer is poor, which causes the sintering ore to be over-melted, the FeO content to be increased, the reducibility to be reduced, the coke ratio in the blast furnace smelting to be increased, and a part of the fuel cannot be fully combusted, which forms secondary sintering on the circular cooler, the finished ore cannot be fully cooled, and the belt is burned, etc. When the fuel particle size is too fine (3mm), the situation is opposite.

[0058] And most of the existing fuel particle size control technologies have low efficiency, and the precision of the fuel particle size control is also very low. Based on this, the present application provides the following embodiments to solve the above problems.

[0059] Figure 1 A flowchart of a sintering fuel particle size control method of the present application.

[0060] Reference Figure 1 It can be known that the present embodiment also provides a sintering fuel particle size control method, and the control method comprises:

[0061] S1, acquire basic parameters, the basic parameters including the thermal state information of the sinter cake cross section, the fuel related process operation parameters, the yield of the sinter and the quality history data of the sinter, wherein the fuel related process operation parameters include fuel ratio, coke powder ratio, coal powder ratio, layer thickness, comprehensive conveying capacity and sintering machine speed, specifically, in the embodiment, the basic parameters are the core data for adjusting the fuel particle size, the basic parameters include the related parameters of the fuel at the current time, the process parameters at the current time and the historical parameters generated in the production line operation, by combining the historical parameters and the current time parameters, the precision of adjusting the fuel particle size is improved.

[0062] It should be noted that according to different needs, such as historical process parameters, can also be used as sub-parameters in the basic parameters, and by comparing the past process and the current process, further data support can be provided for the control of the fuel particle size.

[0063] The control method further comprises:

[0064] S2, calculate the optimal particle size interval value of the fuel according to the basic parameters, specifically, in the embodiment, the specific steps of calculating the optimal particle size interval value of the fuel are: introducing the basic parameters into a pre-set fuel optimal average particle size control model, performing fusion processing on the basic parameters through the fuel optimal average particle size control model, and finally obtaining the optimal particle size interval value of the fuel, wherein the fuel optimal average particle size control model is established by using an artificial intelligence algorithm, first, the historical data of the production process and the fuel particle size distribution value are used as training data, and the model is iteratively trained multiple times to obtain.

[0065] The control method further comprises:

[0066] S3, acquire the average value of the fuel particle size at the current time, specifically, in the embodiment, the average value of the fuel particle size at the current time is the average value of all fuels in a cross section or a region of the conveying belt in the production line.

[0067] The specific steps of acquiring the average value of the fuel particle size at the current time are:

[0068] Acquire the particle size of the fuel at the current time, classify the fuel at the current time according to the size of the particle size, and measure the weight value of each level of fuel; calculate the distribution of the fuel particle size according to the weight value corresponding to each level of fuel; calculate the average value of the fuel particle size at the current time according to the distribution of the fuel particle size.

[0069] The control method further comprises:

[0070] S4, generating a first control strategy for adjusting a first roll gap parameter of the four-roll crusher according to the optimal particle size interval value of the fuel and the average value of the fuel particle size at the current time, the first roll gap parameter being a distance between upper two rollers and a distance between lower two rollers in the four-roll crusher, specifically, in the embodiment, by using the first control strategy, self-regulation of the four-roll crusher is realized, wherein the upper two rollers and the lower two rollers in the four-roll crusher can be independently adjusted, so as to improve the diversity of the particle size adjustment mode.

[0071] Specifically, the steps of adjusting the first roll gap parameter of the four-roll crusher are as follows:

[0072] If the average value of the fuel particle size at the current time is greater than the first preset value, a first control instruction for reducing the first roll gap parameter is generated, and the four-roll crusher reduces the distance between the upper two rollers and / or the distance between the lower two rollers according to the first control instruction; if the average value of the fuel particle size at the current time is less than the first preset value, it is determined whether the average value of the fuel particle size at the current time is less than a second preset value, the second preset value being less than the first preset value; if the average value of the fuel particle size at the current time is less than the second preset value, a second control instruction for increasing the first roll gap parameter is generated, and the four-roll crusher increases the distance between the upper two rollers and / or the distance between the lower two rollers according to the second control instruction.

[0073] It should be noted that each two rollers in the four-roll crusher can be independently self-adjusted according to different requirements.

[0074] Further, in some embodiments, the control method further comprises:

[0075] S4, generating a first control strategy for adjusting a first roll gap parameter of the four-roll crusher according to the optimal particle size interval value of the fuel and the average value of the fuel particle size at the current time, the first roll gap parameter being a distance between upper two rollers and a distance between lower two rollers in the four-roll crusher, specifically, in the embodiment, by using the first control strategy, self-regulation of the four-roll crusher is realized, wherein the upper two rollers and the lower two rollers in the four-roll crusher can be independently adjusted, so as to improve the diversity of the particle size adjustment mode.

[0076] It should be noted that the control of the pair of roll crushers and the four-roll crusher can be performed simultaneously or independently.

[0077] Specifically, the steps of generating the second control strategy for adjusting the pair of roll crushers and the four-roll crusher are as follows:

[0078] When the average value of the current time fuel particle size is greater than a first preset value, a third control instruction for reducing the second roller gap parameter is generated, that is, when the fuel size is too large, the gap value of the pair of roll crushers is reduced to reduce the size of the fuel; when the average value of the current time fuel particle size is less than a second preset value, a fourth control instruction for increasing the second roller gap parameter is generated, that is, when the fuel size is too small, the gap value of the pair of roll crushers is increased to increase the size of the fuel. Figure 2 A schematic diagram of a sintering fuel particle size control system.

[0079] Figure 3 A device structure diagram of a sintering fuel particle size control system.

[0080] Referring to Figure 2 and Figure 3 It can be seen that the embodiment provides a sintering fuel particle size control system, which comprises:

[0081] An optimal average particle size analysis module 100 is configured to calculate an optimal particle size interval value of the fuel, and in the embodiment, the optimal particle size interval value is an optimal size interval for optimizing the fuel particle size. It should be noted that the optimal particle size interval value can be changed according to different requirements.

[0082] The control system further comprises:

[0083] A fuel average particle size calculation module 200 is configured to obtain an average value of the current time fuel particle size, and in the embodiment, the current time fuel is fuel after crushing treatment. The crushing treatment process can be adaptively adjusted according to different requirements, and is not limited in the embodiment.

[0084] The average value of the current time fuel particle size is the average value of the particle size of the fuel after crushing treatment, and the calculation of the average value of the current time fuel particle size is completed by the fuel average particle size calculation module 200 inside the fuel particle size detection robot. The fuel particle size detection robot can intercept a fuel sample on a fuel conveying belt in the control system of the embodiment by using a sampling device, perform particle size classification on the fuel sample, and then automatically weigh the fuel weight value of each particle size level, so as to calculate the current time fuel particle size composition distribution value and the fuel particle size average value. It should be noted that the fuel sample is obtained by the sampling device of the fuel particle size detection robot to calculate the average value of the current time fuel particle size. The fuel sample is dried first, and then automatically screened in multiple layers. The weight value of each particle size level is obtained by using a weighing sensor, or other fuel particle size detection devices are used, and the embodiment is not limited.

[0085] For example, if there is a need to obtain an infrared image, an infrared camera is arranged, and if there is a need for a visible light image, a visible light camera is arranged. It should be noted that according to different image acquisition devices, a processor and a sensor matched therewith need to be arranged.

[0086] The control system further comprises:

[0087] The fuel particle size control module 300 is configured to generate a first control strategy for adjusting a first roll gap parameter of the four-roll crusher 420 according to a deviation value of both the optimal particle size interval value of the fuel and the average value of the current fuel particle size, the first roll gap parameter being a distance between upper two rollers and a distance between lower two rollers in the four-roll crusher 420. Specifically, in the embodiment, the fuel particle size control module 300 functions as a strategy generation and transmission. The strategy generation can be understood as adjusting the related hardware devices so as to generate the related control strategy, with the goal of making the average value of the current fuel particle size approach the optimal particle size interval value.

[0088] The four-roll crusher 420 is a reasonably structured, compact, and reliable medium and fine crusher. The main function is to crush the fuel particle size to generate fuel meeting the optimal particle size range, including upper two rollers and lower two rollers, each of which has a driving roller and a driven roller, and the driving roller is movable. The working principle is that the friction force on the surface of the rollers brings the material into the working cavity of the two rollers, and the material is crushed by extrusion and shearing force. The control of the fuel particle size is realized by adjusting the gap between the two rollers (the driving roller and the driven roller) through the hydraulic protection adjustment system driving the bearing seat of the driving roller connected with the roller shaft to move forward and backward.

[0089] The first roll gap parameter is the distance between the upper two rollers and the distance between the lower two rollers in the four-roll crusher 420, that is, the distance between the rollers in the four-roll crusher 420 is controlled through the related strategy, and the upper two rollers and the lower two rollers can be independently operated. According to different requirements, different rollers are adjusted and different strategies are formulated to achieve the diversity of fuel particle size control.

[0090] By independently controlling the upper two rollers and the lower two rollers in the four-roll crusher 420, it is also convenient for the maintenance and control of the four-roll crusher 420. When maintenance is needed, the upper two rollers and the lower two rollers can be independently simulated to run, so that the maintenance point can be quickly found, and the problem of too long production line stop time caused by equipment maintenance is avoided.

[0091] It should be noted that the distance between the upper two rollers and the distance between the lower two rollers in the four-roll crusher 420 are regulated by sending relevant strategies to the control system of the four-roll crusher, the control system analyzes the received control strategies, and then automatically adjusts the roll gap value of the four-roll crusher 420 according to the gap setting value and the relevant control commands in the control strategies.

[0092] The control system further comprises:

[0093] The fuel particle size control execution module 400 comprises the four-roll crusher 420 and a four-roll crusher intelligent control unit, and is configured to receive the first control strategy comprising a plurality of control instructions, and drive the four-roll crusher 420 to automatically adjust the first roll gap system parameter according to the first control strategy. Specifically, in this embodiment, the fuel particle size control execution module 400 outputs the control instructions in the first control strategy to the matched intelligent control unit of the four-roll crusher 420, the intelligent control unit outputs signals to the servo electric adjustment device and the hydraulic system, and the servo top rod in the electric adjustment device and the hydraulic cylinder driving the passive roller bearing are driven to move to realize the regulation and control of the first roll gap system parameter, so as to realize the automatic control of the fuel particle size.

[0094] For example, the automatic gap adjustment steps are as follows:

[0095] (1) The electric adjustment device and the hydraulic cylinder are all retracted to the initial position (0 mm extension state);

[0096] (2) The hydraulic cylinder pushes the passive roller bearing seat of the crusher forward until the two rollers of the crusher contact each other, and the roller gap is zero (i.e. the roller gap is zero), and at the same time the pressure of the hydraulic system is increased to 5Mpa (this pressure can be set according to the needs), and then the oil pump is automatically stopped and the oil cylinder stops moving;

[0097] (3) Start the servo motor, push the top rod of the adjustment device forward until the top rod and the passive roller bearing seat contact each other, and at the same time the servo motor feeds back a signal to the central control end, and when the signal is consistent with the set signal, the servo motor automatically stops moving;

[0098] (4) Start the oil pump, and retract the oil cylinder to the position, and the pressure of the oil cylinder rod cavity is zero;

[0099] (5) Start the servo motor again, push the top rod of the adjustment device forward, and the pushing distance is determined according to the required gap of the roller (for example, the upper roller gap is 6 mm and the lower roller gap is 3 mm), and this value is pre-set on the system HMI interface. At the same time, the servo motor feeds back a signal to the automatic control system of the equipment, and when the feedback signal value is the same as the set value, the servo motor stops moving;

[0100] (6) Restart the oil pump, the hydraulic cylinder before push, drive the passive roller bearing seat before push, until the bearing seat against the top rod of the adjusting device, the oil pressure rises, reaches the set crusher working pressure upper limit, the oil pump is automatically stopped, relying on the hydraulic system accumulator automatic pressure retention, when the hydraulic system pressure drops to the lower limit of the set crusher working pressure, automatically start the oil pump, automatically supplement the pressure to the cylinder, ensure that the crushing working pressure is stable between the upper and lower limits.

[0101] Further, in some embodiments, the fuel average particle size calculation module 200 includes a fuel particle size distribution acquisition unit 210 and a fuel average particle size calculation unit 220. Specifically, in this embodiment, the main structure of the fuel particle size distribution acquisition unit 210 includes a fuel particle size detection robot, and the specific acquisition method includes data calculation and image analysis. The main structure of the fuel average particle size calculation unit 220 includes a calculation processor.

[0102] The fuel particle size distribution acquisition unit 210 is configured to:

[0103] classify the fuel at the current time according to different particle sizes, and measure the weight value of each level of fuel;

[0104] calculate the distribution of the fuel particle size according to the weight value corresponding to each level of fuel.

[0105] Specifically, in this embodiment, the classification of the fuel at the current time according to different particle sizes is completed by a screen device provided in the fuel particle size distribution acquisition unit 210. The screen device can classify the fuel according to different particle sizes. There are 4 layers of screens with different hole diameters in the screening device.

[0106] For example, the hole diameters in the screening device are 0.5mm, 1mm, 3mm and 5mm, respectively. By setting the screening device with the above-mentioned hole diameters, different particle size distributions of <0.5mm, 0.5-1mm, 1-3mm, 3-5mm, and 5mm or more are obtained.

[0107] The measurement of the weight value of each level of fuel is completed by a weighing platform built in the fuel particle size distribution acquisition unit 210. The weighing platform is provided in the fuel particle size detection robot platform. The robot clamps each material screen and places it on the weighing platform. The weighing platform can obtain the weight value of the fuel.

[0108] It should be noted that the weighing platform weighs the screens with different hole diameters to obtain the weight values of the fuels with different particle sizes.

[0109] Specifically, the particle size composition of five sieved sizes of <0.5 mm, 0.5-1 mm, 1-3 mm, 3-5 mm and 5 mm is weighed, respectively, and recorded as Wdry1, Wdry2, Wdry3, Wdry4, and Wdry5.

[0110] The distribution of the fuel particle size is calculated as follows:

[0111] The particle size composition ratio of less than 0.5 mm:

[0112] The particle size composition ratio of 0.5 mm-1 mm:

[0113] The particle size composition ratio of 1 mm-3 mm:

[0114] The particle size composition ratio of 3 mm-5 mm:

[0115] The particle size composition ratio of more than 5 mm:

[0116] Wherein, .

[0117] Wherein is the total mass of the fuel sample.

[0118] The fuel average particle size calculation unit 220 is configured to calculate the average value of the fuel particle size at the current time according to the distribution of the fuel particle size. Specifically, in this embodiment, the calculation formula of the average value of the fuel particle size at the current time is as follows:

[0119] .

[0120] Further, in some embodiments, the optimal average particle size analysis module 100 includes a parameter acquisition unit 110 and an intelligent calculation unit 120. Specifically, in this embodiment, the parameter acquisition unit 110 is configured to acquire relevant parameters, and the intelligent calculation unit 120 is configured to calculate the optimal particle size interval value of the fuel.

[0121] The parameter acquisition unit 110 is configured to acquire a basic parameter, and the basic parameter includes thermal state information of a sinter cake cross section, fuel-related process operation parameters, yield of sinter, and quality history data of sinter. The fuel-related process operation parameters include fuel ratio, coke powder ratio, coal powder ratio, bed thickness, comprehensive conveying capacity, and sintering machine speed. Specifically, in this embodiment, the thermal state information of the sinter cake cross section is a tail cross section intelligent identification result. For the thermal state information of the sinter cake cross section, in order to realize continuous and stable sintering production and high-quality production, the prior art mainly adopts a method of directly observing by manual observation and observing through a sintering machine tail visible light industrial television system. The sinter quality is generally monitored on line by analyzing the tail cross section infrared image. The infrared image of the sinter cake cross section of the sintering machine tail discharge area can directly reflect the information of the bed state, is a comprehensive reaction of the sintering production process, and can be used as a main basis for controlling the heat level in the sinter bed. Therefore, the optimal particle size interval value with higher confidence can be calculated through this parameter.

[0122] The fuel ratio, coke powder ratio, coal powder ratio, bed thickness, comprehensive conveying capacity, and sintering machine speed are all key operation parameters of the sintering process, which can be adjusted according to different needs.

[0123] The quality data of the sinter is an important index for evaluating the advantages and disadvantages of the sinter. Therefore, by taking the quality data of the sinter as a basic parameter for calculating the optimal particle size interval value, the authenticity of the optimal particle size interval value can be further improved.

[0124] The intelligent calculation unit 120 is configured to import the basic parameter into a fuel optimal average particle size control model for fusion calculation processing to obtain the optimal particle size interval value of the fuel. Specifically, in this embodiment, by importing the basic parameter into the fuel optimal average particle size control model as an input parameter of an artificial intelligence algorithm inside the control model, data features of the input parameter are extracted, and then an artificial intelligence algorithm model that has been trained is used to output an optimal particle size interval value, so as to obtain the optimal particle size interval value of the fuel.

[0125] Further, in some embodiments, the fuel particle size control execution module 400 further includes a pair of roll crusher intelligent control unit 410 and a pair of roll crusher 430. Specifically, in this embodiment, in order to further optimize the automatic control of the particle size, the pair of roll crusher 430 is also included in the fuel particle size control execution module 400, so that the pair of roll crusher 430 has the function of automatic regulation and control.

[0126] The pair roller crusher intelligent control unit 410 is configured to receive the control strategy sent by the fuel particle size control module 300 and send the control strategy to the pair roller crusher 430. In this embodiment, in order to avoid the problem that one unit has multiple different functions, resulting in confusion in calculation or system downtime, the function of receiving and sending related information is separately arranged to the pair roller crusher intelligent control unit 410, so as to avoid the problem that one unit has the functions of receiving and sending information and processing information, resulting in subsequent processing being not smooth.

[0127] The fuel particle size control module 300 is further configured to generate a second control strategy for adjusting the gap value of the pair roller crusher 430 according to the optimal particle size interval value of the fuel and the average value of the fuel particle size at the current moment, and the second control strategy includes multiple control instructions. In this embodiment, the fuel particle size control module 300 can further generate a second control strategy for regulating the pair roller crusher 430, and the pair roller crusher 430 adjusts the roller gap value according to the control instructions in the second control strategy.

[0128] The pair roller crusher 430 is configured to automatically adjust a second roller gap system parameter according to the second control strategy, and the second roller gap system parameter is the distance between the two rollers of the pair roller crusher 430. Specifically, a servo motor drives an adjusting device to act on a top rod, and the servo motor can feed the extension and retraction action data of the adjusting device to the automatic control system of the equipment. The action of the oil cylinder of the hydraulic system, the roller gap, and the working pressure value feedback signal are fed to the automatic control system of the equipment. The servo motor adjusting device and the hydraulic system form a closed loop control.

[0129] Further, in some embodiments, the fuel particle size control module 300 is further configured to:

[0130] determine whether the average value of the fuel particle size at the current moment is greater than a first preset value;

[0131] if yes, generate a first control instruction for reducing the first roller gap system parameter and send the first control instruction to the fuel particle size control execution module 400;

[0132] if no, determine whether the average value of the fuel particle size at the current moment is less than a second preset value, the first preset value being greater than the second preset value;

[0133] if yes, generate a second control instruction for increasing the first roller gap system parameter and send the second control instruction to the fuel particle size control execution module 400;

[0134] The fuel particle size control execution module 400 is further configured to:

[0135] According to the first control instruction, the distance between the upper two rollers and / or the distance between the lower two rollers is reduced;

[0136] According to the second control instruction, the distance between the upper two rollers and / or the distance between the lower two rollers is increased.

[0137] Specifically, in the embodiment, the control strategy of the first gap is as follows:

[0138] The current setting value of the lower roller of the four rollers is V1 Set, and the current setting value of the upper roller gap is V2 Set. The roller gap value is adjusted according to the following control strategy, wherein MS is the average value of the fuel particle size, and the specific adjustment strategy is as follows:

[0139] 1) When 1.5≤MS≤1.8, the current roller gap value is appropriate, and no adjustment is needed;

[0140] 2) MS<1.5mm, obviously the average particle size is too small, and according to the size of the deviation value , the roller gap value is adjusted.

[0141]

[0142] 3) MS>1.8mm, obviously the average particle size is too large, and according to the size of the deviation value , the roller gap value is adjusted.

[0143]

[0144] The constraint of the upper roller adjustment value is 5mm~8mm, that is, 5≤V2 Set≤8mm, and the constraint of the lower roller adjustment value is 2~5mm, that is, 2≤V1 Set≤5mm. The upper roller adjustment setting value and the lower roller adjustment setting value cannot exceed the constraint range, and if it exceeds the range, it must be limited to the upper limit or the lower limit.

[0145] The fuel particle size control execution module 400 is further used for:

[0146] According to the third control instruction, the distance between the two rollers of the double-roller crusher is reduced;

[0147] According to the fourth control instruction, the distance between the two rollers of the double-roller crusher is increased;

[0148] Specifically, in the embodiment, the control strategy of the second roller gap is as follows

[0149] The constraint condition of the two-roller gap value of the roll crusher is 10-20 mm, and then the current gap setting value of the roll crusher is adjusted according to the deviation value of the fuel particle size average value after the crushing of the four-roller crusher from the optimal average particle size (1.5 mm-1.8 mm),

[0150] The current setting value of the gap value of the roll crusher is V3_Set, and MS is the fuel particle size average value, when

[0151]

[0152] The current setting value of the gap value of the roll crusher is V3_Set, when ,

[0153]

[0154] Further, in the embodiment, the control system further comprises a fuel buffer module 500 and a fuel storage module 600, the fuel buffer module 500 is used for storing fuel which has not been subjected to the crushing treatment, and the fuel storage module 600 is used for storing fuel which has been subjected to the crushing treatment and the particle size monitoring.

Claims

1. A method for controlling the particle size of sintered fuel, characterized in that, The control method includes: Acquire basic parameters, including thermal state information of sinter cake cross-section, fuel-related process operating parameters, sinter output and historical sinter quality data. The fuel-related process operating parameters include fuel ratio, coke powder ratio, coal powder ratio, material layer thickness, comprehensive conveying capacity and sintering machine speed. The optimal particle size range of the fuel is calculated based on the aforementioned basic parameters; Obtain the average value of the fuel particle size at the current moment; A first control strategy for adjusting the first roller gap system parameters of the four-roll crusher is generated based on the optimal particle size range of the fuel and the average particle size of the fuel at the current moment. The first roller gap system parameters are the distance between the upper two rollers and the distance between the lower two rollers in the four-roll crusher. A second control strategy for adjusting the second roll gap system parameters of the double roll crusher is generated based on the optimal particle size range of the fuel and the average particle size of the fuel at the current moment. The second roll gap system parameters are the distance between the two rolls of the double roll crusher. The first control strategy for generating parameters of the first roller gap system of the four-roll crusher includes: Determine whether the average fuel particle size at the current moment is greater than a first preset value: If so, a first control command is generated to reduce the first roller gap parameters, and the four-roll crusher reduces the distance between the upper two rollers and / or the distance between the lower two rollers according to the first control command; If not, then determine whether the average value of the fuel particle size at the current moment is less than the second preset value, and the second preset value is less than the first preset value; If so, a second control command is generated to increase the parameters of the first roller gap system, and the four-roll crusher increases the distance between the upper two rollers and / or the distance between the lower two rollers according to the second control command; The step of calculating the optimal particle size range of fuel based on the basic parameters is as follows: the basic parameters are imported into a pre-set optimal average particle size control model for fuel, and the basic parameters are fused through the optimal average particle size control model for fuel to finally obtain the optimal particle size range of fuel. The optimal average particle size control model for fuel is established by using historical data of production process and fuel particle size distribution values ​​as training data and artificial intelligence algorithm.

2. The method for controlling the particle size of sintered fuel according to claim 1, characterized in that, The process of obtaining the average value of the fuel particle size at the current moment includes: Obtain the particle size of the fuel at the current moment, classify the fuel at the current moment according to the particle size, and measure the weight value of each class of fuel. The distribution of fuel particle size is calculated based on the weight value corresponding to each fuel level; The average value of the fuel particle size at the current moment is calculated based on the distribution of the fuel particle size.

3. The method for controlling the particle size of sintered fuel according to claim 1, characterized in that, The second control strategy for adjusting the gap value of the double-roll crusher includes: When the average value of the fuel particle size at the current moment is greater than the first preset value, a third control command is generated to reduce the parameters of the second roll gap system. When the average value of the fuel particle size at the current moment is less than the second preset value, a fourth control command is generated to increase the parameters of the second roll gap system.

4. A control system for sintered fuel particle size, characterized in that, The control system is applicable to the sintering fuel particle size control method according to any one of claims 1 to 3, and the control system includes: The optimal average particle size analysis module (100) is used to calculate the optimal particle size range value of the fuel. A fuel average particle size calculation module (200) is used to obtain the average value of the fuel particle size at the current moment; A fuel particle size control module (300) is used to generate a first control strategy for adjusting the first roller gap system parameters of a four-roll crusher (420) based on the optimal particle size range of the fuel and the average value of the fuel particle size at the current moment. The first roller gap system parameters are the distance between the upper two rollers and the distance between the lower two rollers in the four-roll crusher (420). A fuel particle size control execution module (400) is provided, which includes the four-roll crusher (420) and a four-roll crusher intelligent control unit (440). The fuel particle size control execution module (400) is used to receive the first control strategy, which includes multiple control instructions, and drive the four-roll crusher (420) to automatically adjust the first roll gap parameters according to the first control strategy. The optimal average particle size analysis module (100) includes a parameter acquisition unit (110) and an intelligent calculation unit (120). The parameter acquisition unit (110) is used to acquire basic parameters, including thermal state information of sinter cake cross-section, fuel-related process operating parameters, sinter output and historical data of sinter quality. The fuel-related process operating parameters include fuel ratio, coke powder ratio, coal powder ratio, material layer thickness, comprehensive conveying capacity and sintering machine speed. The intelligent computing unit (120) is used to import the basic parameters into a pre-set optimal average particle size control model for fuel, and to perform fusion processing on the basic parameters through the optimal average particle size control model for fuel to finally obtain the optimal particle size range value of the fuel. The optimal average particle size control model for fuel is established by using historical data of production process and fuel particle size distribution value as training data and through artificial intelligence algorithm. The fuel particle size control execution module (400) also includes a double roll crusher intelligent control unit (410) and a double roll crusher (430). The fuel particle size control module (300) is also used to generate a second control strategy for adjusting the gap value of the double roll crusher (430) based on the optimal particle size range value of the fuel and the average value of the fuel particle size at the current moment. The second control strategy includes multiple control instructions. The intelligent control unit (410) of the double roll crusher is used to receive the second control strategy sent by the fuel particle size control module (300) and send the second control strategy to the double roll crusher (430). The double roll crusher (430) is used to automatically adjust the second roll gap system parameters according to the second control strategy. The second roll gap system parameters are the distance between the two rolls of the double roll crusher (430). The fuel particle size control module (300) is also used for: Determine whether the average value of the fuel particle size at the current moment is greater than a first preset value; If so, a first control command for reducing the parameters of the first roll gap system is generated and sent to the fuel particle size control execution module (400). If not, then determine whether the average value of the fuel particle size at the current moment is less than the second preset value, where the first preset value is greater than the second preset value; If so, a second control command for increasing the parameters of the first roll gap system is generated and sent to the fuel particle size control execution module (400). The fuel particle size control execution module (400) is also used for: According to the first control command, reduce the distance between the two upper rollers and / or the distance between the two lower rollers; According to the second control command, increase the distance between the upper two rollers and / or the distance between the lower two rollers.

5. A control system for sintering fuel particle size according to claim 4, characterized in that, The fuel average particle size calculation module (200) includes a fuel particle size distribution acquisition unit (210) and a fuel average particle size calculation unit (220). The fuel particle size distribution acquisition unit (210) is used for: The fuel at the current moment is classified according to different particle sizes, and the weight value of each grade of fuel is measured. The distribution of fuel particle size is calculated based on the weight value corresponding to each fuel level; The fuel average particle size calculation unit (220) is used to calculate the average value of the fuel particle size at the current moment based on the distribution of the fuel particle size.

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