A method, system and device for weighing and compensating a furnace top material tank

Abstract

The present application provides a kind of furnace top material tank weighing compensation method, system and equipment, the compensation method includes in current material distribution period, the real-time noise signal and real-time vibration signal at the center throat pipe are acquired;The real-time noise signal and the real-time vibration signal are analyzed and processed, when the real-time noise signal is target noise signal value, and / or the real-time vibration signal is target vibration signal value, then the discharge period of current material distribution period is identified.In the end of current discharge period, read the weight signal value of furnace top material tank, record as weighing compensation value after operation processing;After blast furnace enters next round material distribution period, the weighing compensation value is continuously compensated to weighing value, and the weighing value after compensation is used as output value and is transferred to furnace top material distribution model.Compared with prior art, the operation accuracy of each material distribution period is effectively improved in the present scheme by weighing compensation method.

Description

Technical Field

[0001] This invention belongs to the field of blast furnace or vertical furnace charging technology in the metallurgical industry, and in particular relates to a weighing compensation method, system and equipment for furnace top charge tank. Background Technology

[0002] The top charging system is one of the four major operating systems of a blast furnace, largely determining its smooth operation and energy efficiency. Most blast furnace top charging models rely on real-time and accurate measurement of the burden weight in the top charging hopper. Based on the burden weight and the charging matrix, the model controls the opening of the flow regulating valve and the chute angle to accurately distribute the burden to the target position within the furnace, forming the target burden surface shape. Modern blast furnaces mostly operate under high pressure, with pressure equalization and drainage facilities on the top charging hopper to accommodate the pressure difference between the inside and outside of the furnace. Simultaneously, the pressure inside the blast furnace fluctuates dynamically according to process conditions. For top charging hoppers using weighing sensors, the weighing equipment cannot accurately measure the burden weight due to the lifting force of the furnace pressure and the blind plate force of the pressure equalization and drainage facilities. Typically, the measured weight is greater than the actual weight of the burden in the top charging hopper, resulting in a larger opening of the flow regulating valve and a faster actual charging rate. This manifests as the top charging hopper being emptied before the target number of charging cycles set by the process is completed. This leads to disordered airflow distribution within the blast furnace, poor operational compliance, and even difficulty in operating the furnace. On the other hand, due to weighing errors, the furnace charge may have actually been emptied, but the material flow regulating valve remains open for a long time, reducing the operating efficiency of the furnace top system.

[0003] Modern vertical shaft furnaces also mostly adopt a high-pressure operation system. Similar to blast furnace charging, the charging hoppers at the top of the furnace are also equipped with equalization and pressure discharging facilities and weight weighing facilities. During high-pressure operation, there is also a problem of inaccurate weighing of the charging hoppers.

[0004] Currently, there are several weighing compensation technologies for furnace top charge hoppers:

[0005] 1) Knowledge-based models that rely on process flow and production experience, by precisely decomposing the material feeding process and combining the empirical values ​​of furnace top pressure and weighing offset, design and calculate models to dynamically compensate for the weighing results. This type of technology depends on specific equipment and operating processes and does not have wide applicability.

[0006] 2) Pure software model: The furnace charge is weighed separately in multiple weighing hoppers during batching. The weights of the multiple separate weighing results are collected, summed, and then the furnace top weighing is compensated after appropriate correction. This type of technology is also an empirical model, which relies on the accuracy of the separate weighing and will accumulate errors in the separate weighing results to varying degrees. It does not fundamentally solve the problem and has poor adaptability.

[0007] In summary, the existing technologies for furnace top weighing compensation systems have drawbacks such as poor adaptability and reliance on specific equipment and experience. Summary of the Invention

[0008] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a furnace top weighing compensation method, system and equipment to solve the problems of poor adaptability and dependence on specific equipment and experience in furnace top weighing compensation technology.

[0009] In this scheme, the blast furnace mainly uses coke and iron ore to smelt iron. Modern blast furnaces generally charge coke and iron ore separately. Some modern vertical shaft furnaces use pellets and high-pressure, high-temperature reducing gas to produce direct reduced iron. To maintain stable pressure inside the furnace, intermittent charging is often used during charging. A sealable, pressurized, and weighable material tank is installed at the top of the furnace, namely the weighing tank or material tank described in this specification. The top of the material tank is equipped with an upper feed valve that can isolate solid materials and an upper sealing valve that can seal the gas. The bottom of the material tank is equipped with a material flow regulating valve that can isolate and control the opening degree and a lower sealing valve that can seal the gas. The main steps of charging a blast furnace are as follows: First, close the material flow regulating valve and lower sealing valve at the bottom of the charging hopper to isolate the high-pressure gas inside the furnace. Open the pressure relief valve in the pressure assembly to release the pressure inside the hopper. Open the charging gate and upper sealing valve to charge coke or iron ore into the charging hopper. Close the charging flow valve and upper sealing valve. Open the pressure equalization valve in the pressure assembly to fill the charging hopper with high-pressure gas so that the pressure inside the charging hopper is approximately equal to the pressure inside the blast furnace. The charging hopper weighing sensor transmits a weight signal to the top charging model (industrial control software). The top charging model opens the lower sealing valve according to process requirements and the weight signal, and adjusts the opening of the material flow regulating valve to maintain a uniform discharge of material from the charging hopper, which then enters the blast furnace through the central throat. The weighing compensation technology described in this case aims to transmit accurate furnace charge weight signal values ​​to the top charging model, overcoming the weighing errors caused by the furnace pressure and the pressure equalization and discharge facilities.

[0010] The charging cycle refers to the charging process from the start of loading the furnace charge into the furnace top charge hopper until all the furnace charge in the furnace top charge hopper is discharged into the blast furnace body through the central throat pipe, wherein the furnace charge in the current charging cycle and the next charging cycle is the same or similar furnace charge.

[0011] The discharge cycle refers to the time period from when the material flow regulating valve is opened (when the furnace charge begins to enter the central throat) to when all the furnace charge in the hopper is emptied.

[0012] To achieve the above and other related objectives, the technical solution of the present invention is as follows:

[0013] In a first aspect, a method for weighing compensation of a furnace top charge hopper includes:

[0014] Real-time noise and vibration signals at the center throat are acquired during the current fabric fabric cycle.

[0015] The real-time noise signal and the real-time vibration signal are analyzed and processed. When the real-time noise signal is the target noise signal value and / or the real-time vibration signal is the target vibration signal value, the material feeding cycle within the current material feeding cycle is identified.

[0016] At the end of the current discharge cycle, read the weight signal value I from the furnace top hopper. t Calculate I0 = I t -X, where X is the lower limit value set by the weighing equipment, given by the weighing equipment, and recorded as the weighing compensation value I0;

[0017] When the blast furnace top charging enters the next charging cycle and the discharge cycle begins, the recorded weighing compensation value I0 is continuously compensated to the weighing value of the charging hopper.

[0018] In the next feeding cycle, the weighing compensation value is continuously compensated to the weighing value of the material tank;

[0019] Among them, compensation refers to adjusting the weighing value I of the material tank in the next discharge cycle. t+1 The weight signal value I = I is summed with the weighing compensation value I0 and output to the furnace top material distribution model. t+1 +kI0, where k is called the compensation coefficient.

[0020] Optionally, at the end of the current discharge cycle, read the weight signal value I of the material tank. t After calculation and analysis, it is recorded as the weighing compensation value I0, including:

[0021] Calculate I0 = I t -X, where X is the lower limit value set for the weighing facility, and I0 is set to ≥ 0;

[0022] When I0 > 0, record I0 as the weighing compensation value;

[0023] When I0 = 0, record I0 = -n as the weighing compensation value, where n is the number of consecutive cycles of the I0 = 0 condition. For the first cycle, n = 1; for the second cycle, n = 2; and so on, with n = n for the nth cycle.

[0024] Optionally, in the next feeding cycle, the weighing compensation value is continuously compensated to the weighing value of the material tank, including:

[0025] The furnace top feeding model continuously outputs a compensated weight signal value I. When I = X, X is the lower limit value of the weighing facility. The furnace top feeding model can determine that the furnace material in the hopper is emptied, close the material flow regulating valve and the lower sealing valve, and end the current feeding cycle.

[0026] Optionally, during the current fabric cycle, real-time noise and vibration signals at the center throat can be acquired, including:

[0027] The real-time noise signal is the noise signal generated by the friction and impact between the furnace charge and the inner wall of the central throat tube, and the real-time vibration signal is the vibration signal generated by the friction and impact between the furnace charge and the inner wall of the central throat tube.

[0028] Optionally, if the compensated weight signal I of the furnace top hopper is greater than M, where M is the upper limit value set by the weighing facility and given by the weighing facility, then the forced weighing compensation value I0 = 0.

[0029] Optionally, the blast furnace pressure value P is obtained each time material is discharged, and ΔP = P is calculated. t+1 -P t Therefore, if the absolute value of △P exceeds the preset value, the forced weighing compensation value I0 = 0 will be applied.

[0030] In a second aspect, the present invention also provides a weighing compensation system for a furnace top hopper, comprising:

[0031] The signal acquisition unit acquires real-time noise and vibration signals at the center throat during the current fabric fabric cycle.

[0032] The signal analysis unit analyzes and processes the real-time noise signal and the real-time vibration signal. When the real-time noise signal is the target noise signal value and / or the real-time vibration signal is the target vibration signal value, the current material discharge cycle is identified.

[0033] At the end of the current material discharge cycle, the weighing compensation unit reads the weight signal value of the furnace top material tank, performs calculation and analysis, and records it as the weighing compensation value; and in the next material discharge cycle, the recorded weighing compensation value is continuously used to compensate the weight value of the material tank.

[0034] The output signal unit outputs the compensated weighing value to the furnace top material distribution model.

[0035] In a third aspect, the present invention also provides a furnace top charge hopper weighing compensation device, which employs a furnace top charge hopper weighing compensation method as described in any of the above claims to participate in the furnace top charging process, the compensation device comprising:

[0036] The furnace top material tank is equipped with an upper sealing valve and an upper material flow valve at its top end, and a material flow regulating valve and a lower sealing valve at its bottom end. The material flow regulating valve is used to regulate the flow rate of the furnace charge through the central throat pipe. The furnace top material tank is also equipped with a pressure assembly for pressurizing and depressurizing the furnace top material tank, and a weighing assembly for weighing the furnace charge.

[0037] A central throat pipe, which is connected to the lower end of the furnace top material tank;

[0038] Blast furnace body, wherein the blast furnace body is connected to the central throat;

[0039] The central throat is equipped with a noise sensor and / or a vibration sensor.

[0040] Optionally, two top material tanks are provided on the upper part of the blast furnace body. The two top material tanks are respectively provided with an upper sealing valve, an upper material flow valve, a material flow regulating valve, a lower sealing valve, a pressure component, and a weighing component. The lower ends of the two top material tanks are respectively connected to a first material flow channel and a second material flow channel. Both the first material flow channel and the second material flow channel are connected to the central throat pipe.

[0041] Optionally, there are two noise sensors, which are respectively disposed on the outer wall of the first material flow channel and the outer wall of the second material flow channel; there are two vibration sensors, which are respectively disposed on the outer wall of the first material flow channel and the outer wall of the second material flow channel.

[0042] The aforementioned method, system, and equipment for weighing compensation of furnace top hoppers utilize real-time noise and vibration signals from the material flow channel during discharge. These signals are used to determine and identify the discharge cycle, effectively preventing the continued discharge of material even after the furnace top hopper is empty, thus significantly improving operational efficiency. At the end of the discharge cycle, the weight signal value of the furnace top hopper is acquired, processed, and used as a weighing compensation value for the next material distribution cycle. This ensures that the weight of the furnace material output to the furnace top distribution model in the next cycle closely approximates the actual weight, achieving precise material distribution, lean operation, improved production efficiency, and reduced energy consumption. Compared to existing technologies, this solution identifies the discharge cycle using noise and vibration signals and effectively improves distribution accuracy through weight compensation. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of a furnace top material tank weighing compensation device according to an example of the present invention;

[0044] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0045] Figure 3 This is a block diagram of a furnace top material tank weighing compensation system according to an example of the present invention;

[0046] Figure 4 This is a flowchart illustrating a furnace top material tank weighing compensation method according to an example of the present invention;

[0047] Figure 5 This is a schematic diagram of the structure of a furnace top material tank weighing compensation device according to another example of the present invention;

[0048] Figure 6This is a block diagram of a furnace top material tank weighing compensation system, as another example of the present invention.

[0049] Figure 7 This is a schematic diagram of the structure of a furnace top material tank weighing compensation device, which is another example of the present invention.

[0050] Figure 8 This is a block diagram of a furnace top material tank weighing compensation system, which is another example of the present invention.

[0051] The reference numerals in the embodiments include:

[0052] Blast furnace body 10, charging chute 11, charging gearbox 12, central throat 20, first material flow channel 31, second material flow channel 32, material flow regulating valve 40, lower sealing valve 41, furnace top material tank 50, upper sealing valve 51, pressure assembly 52, charging flow valve 53, noise sensor 60, vibration sensor 61, weighing assembly 70. Detailed Implementation

[0053] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0054] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0055] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0056] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0057] Example 1

[0058] Figure 1 and Figure 2 This application illustrates an exemplary embodiment of a blast furnace charge weighing compensation device, which includes:

[0059] The furnace top material tank 50 is equipped with an upper sealing valve 51 and an upper material flow valve 53 at its top end, and a material flow regulating valve 40 and a lower sealing valve 41 at its bottom end. The material flow regulating valve 40 is used to regulate the flow rate of the furnace charge through the central throat pipe 20. The furnace top material tank 50 is equipped with a pressure assembly 52 for pressurizing and depressurizing the furnace top material tank 50, and a weighing assembly 70 for weighing the furnace charge.

[0060] A central throat 20 is connected to the lower end of the furnace top material tank 50;

[0061] Blast furnace body 10, wherein the blast furnace body 10 is connected to the central throat 20;

[0062] The central throat 20 is equipped with a noise sensor 60 and a vibration sensor 61.

[0063] Specifically, the weighing assembly 70 typically consists of multiple weighing sensors and a weighing meter, through which the weighing value can be read. The pressure assembly 52 is a pressure equalization and depressurization device used to pressurize and depressurize the furnace top material tank 50; when the furnace top material tank 50 is pressurized, the upper sealing valve 51 and the lower sealing valve 41 are closed, sealing the interior of the furnace top material tank 50. In this equipment, a furnace top material distribution model is installed to control the opening and closing, signal reception, and judgment of structures such as the upper sealing valve 51, the material flow valve 53, the material flow regulating valve 40, the lower sealing valve 41, the pressure assembly 52, and the weighing assembly 70.

[0064] One charging cycle is as follows: The weighing component 70 detects that the weight signal of the furnace charge in the furnace top charge tank 50 has reached the lower limit value. The furnace top charging model sends a "material empty" signal, closes the material flow regulating valve 40 and the lower sealing valve 41, and opens the pressure relief valve of the pressure component 52 to change the pressure of the furnace top charge tank 50 to atmospheric pressure. Then, the upper sealing valve 51 and the upper material flow valve 53 are opened. Under the action of gravity, the furnace charge falls into the furnace top charge tank 50 through the upper material flow valve 53. After the furnace top charge tank 50 is full of furnace charge, the upper material flow valve 53 and the upper sealing valve 51 are closed, the pressure relief valve in the pressure component 52 is closed, and the pressure equalization valve is opened to raise the pressure in the furnace top charge tank 50 to approximately equal to the pressure in the furnace body 10. After receiving the "charging" signal from the blast furnace body 10, the weighing component 70 transmits the weighed weight of the furnace charge in the hopper to the top charging model and opens the lower sealing valve 41. At this time, the gas in the blast furnace body 10 and the top charging hopper 50 are connected and have the same pressure. The top charging model controls the opening of the material flow regulating valve 40 in real time according to the charging matrix input by the process and the real-time weight signal transmitted by the weighing component 70, and controls the discharge speed of the furnace charge in the top charging hopper 50 through the central throat pipe 20, so as to arrange the furnace charge to the weight and position specified by the process and achieve the charging target. After the weighing component 70 detects that all the furnace charge in the hopper has been discharged, the charging model sends a "material empty" signal.

[0065] In a specific embodiment of this scheme, after the weighing compensation device is installed on the top of the blast furnace, a vibration sensor 61 and / or a noise sensor 60 are installed on the outer wall or nearby space of the central throat pipe 20. The noise and vibration generated when the furnace charge rubs and impacts the inner wall of the central throat pipe 20 during the charging process are collected by the noise sensor 60 and the vibration sensor 61 and then transmitted to the signal acquisition unit. The difference in one charging cycle is that after the top charging model receives the "charging" signal from the blast furnace body 10, the weighing component 70 outputs the weight signal value of the furnace charge in the hopper to the compensation unit. The output signal unit compensates for the weighing compensation value recorded in the previous charging cycle and transmits the sum of the weighed weight and the weighing compensation value of the furnace charge in the hopper to the top charging model. The lower sealing valve 41 is opened. At this time, the gas in the blast furnace body 10 and the top charging hopper 50 is connected and the pressure is the same. According to the charging matrix input by the process and the compensated weighing signal, the top charging model controls the opening of the material flow regulating valve 40 and controls the discharge speed of the furnace charge in the top charging hopper 50 through the central throat pipe 20, so as to arrange the furnace charge to the weight and position specified by the process and achieve the charging target. After the weighing component 70 detects that all the furnace charge in the hopper has been discharged, the charging model sends a "material empty" signal.

[0066] It should be noted that compensation is only possible if the charge added to the blast furnace in two consecutive charging cycles is the same or nearly the same material. If the charge added to the blast furnace in two consecutive charging cycles is different, no compensation will be made.

[0067] Figure 3 This is a block diagram illustrating an exemplary embodiment of the present application of a weighing compensation system for a furnace top hopper, which can use... Figure 1 The compensation device for weighing the furnace top hopper shown completes the compensation process. It should be understood that this weighing compensation system can also use other blast furnace hoppers and be specifically implemented by other blast furnace hoppers in the environment. This embodiment does not limit the implementation environment and equipment to which this method is applicable.

[0068] Among them, one type of furnace top charge tank weighing compensation system corresponds one-to-one with one type of blast furnace top charge tank weighing compensation device in the above embodiments, such as... Figure 3 As shown, the compensation system includes a signal acquisition unit, a signal analysis unit, a weighing compensation unit, and an output signal unit. Detailed descriptions of each functional unit are as follows:

[0069] The signal acquisition unit acquires real-time noise and vibration signals at the center throat 20 during the current fabric cycle.

[0070] The signal analysis unit analyzes and processes the real-time noise signal and the real-time vibration signal. When the real-time noise signal is the target noise signal value and / or the real-time vibration signal is the target vibration signal value, the current material discharge cycle is identified.

[0071] At the end of the current material feeding cycle, the weighing compensation unit acquires the weight signal value of the furnace charge in the furnace top hopper 50, performs calculation and analysis, and records it as a weighing compensation value; and in the discharge cycle of the next material feeding cycle, the recorded weighing compensation value is continuously compensated to the weighing value of the hopper.

[0072] The output signal unit outputs the compensated weighing value to the furnace top material distribution model.

[0073] It should be noted that the furnace top hopper weighing compensation system provided in the above embodiments and the furnace top hopper weighing compensation method provided in the above embodiments belong to the same concept. The specific operation methods of each unit have been described in detail in the method embodiments and will not be repeated here. In practical applications, the furnace top hopper weighing compensation system provided in the above embodiments can be assigned to different functional units as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. This is not a limitation here.

[0074] like Figure 4 As shown, in an exemplary embodiment, a furnace top material tank weighing compensation method includes at least steps S410 to S440, which are described in detail below:

[0075] Step S410: Acquire the real-time noise signal and real-time vibration signal at the center throat 20 during the current fabric cycle;

[0076] The charging cycle refers to the entire charging process from the moment the charge is loaded into the top charge hopper 50 until all the charge in the top charge hopper 50 is discharged into the blast furnace body 10 through the central throat pipe 20. The charge in the current charging cycle and the next charging cycle is of the same or similar type. In actual implementation, the charging cycle refers to the cycle in which the top charging equipment adds the same or nearly the same material to the blast furnace. The charging cycle for the same material can be continuous or intermittent.

[0077] In some embodiments, the real-time noise signal is the noise signal generated by the friction and impact between the furnace charge and the inner wall of the central throat 20, and the real-time vibration signal is the vibration signal generated by the friction and impact between the furnace charge and the inner wall of the central throat 20.

[0078] This step occurs during a material feeding cycle. Specifically, during the process of discharging the furnace charge from the top charge hopper 50 through the central throat 20, vibration sensors 61 and noise sensors 60 installed on the outer wall of the central throat 20 or in the vicinity continuously acquire real-time noise and vibration signals at the central throat 20.

[0079] Step S420: Analyze and process the real-time noise signal and the real-time vibration signal. When the real-time noise signal is the target noise signal value and / or the real-time vibration signal is the target vibration signal value, the material feeding cycle within the current fabric feeding cycle is identified.

[0080] The discharge cycle refers to the time period from when the material flow regulating valve is opened (when the furnace charge begins to enter the central throat) to when all the furnace charge in the hopper is emptied.

[0081] Specifically, by calculating and extracting characteristic parameters of real-time noise and vibration signals, and by analyzing and processing these characteristic parameters, the start and end times of material discharge can be accurately identified, thus recording the time cycle of material discharge. The calculation, analysis, and selection of characteristic parameters can be completed by the signal analysis unit.

[0082] This example illustrates the analysis and processing of characteristic parameters. In this case, the material discharge process occurs intermittently, and the noise or vibration signals generated by the friction or impact of the furnace charge on the equipment are functions of amplitude and time, as well as amplitude and frequency. The key to analyzing and processing the signals lies in identifying the amplitude characteristics at the target frequency and the relationship between amplitude and time at a specific frequency. Based on this, a target is set, and the start and end times of the material discharge process are identified, i.e., the material discharge cycle is identified. In actual implementation, factors such as high-pressure gas flow inside the furnace, the opening and closing of heavy valves, furnace charge transportation, and furnace environment wind noise must be considered. Therefore, a reasonable algorithm model must be adopted to reduce the impact of interference factors. In addition, in this case, noise sensors and vibration sensors are used simultaneously. They work concurrently but serve as backups for each other. Either one can independently complete the work of the signal acquisition unit and the signal analysis and processing unit, achieving the objectives of steps S410 and S420. In this case, the noise sensor and vibration sensor can also work simultaneously, with the signal acquisition unit and the signal analysis and processing unit completing their tasks independently. The signal that first identifies the start of the material discharge cycle is selected as the main signal source.

[0083] It is important to note that this solution can employ more detailed logical analysis to process the real-time noise and vibration signals, and use the analysis results to accurately identify the material laying cycle, thereby recording the start and end times of the material laying cycle. By accurately identifying the material laying cycle and recording the symmetry signals at each moment, these records can be combined and applied to the next material laying cycle, enabling the next cycle to complete the material laying efficiently and accurately.

[0084] Step S430: At the end of the current discharge cycle, read the weight signal value I of the material tank. t After calculation and analysis, it is recorded as the weighing compensation value I0;

[0085] Based on vibration and noise signals, it is determined that no furnace charge is being discharged from the central throat 20, indicating that the current discharge cycle has ended. At this time, the weighing component 70 still outputs a furnace charge weight signal value. As mentioned earlier, due to the pressure inside the furnace top charge 50 during the discharge of furnace charge, as well as the blind plate force of the pressure equalization and discharge device of the pressure component 52, the weighing component 70 will affect the weighing of the furnace charge in the furnace top charge 50. When the furnace charge is emptied from the furnace top charge 50, the furnace charge weight signal value should reach the lower limit value set by the weighing component 70. However, in reality, it is usually higher than the lower limit value. Therefore, the furnace charge weight signal value is the deviation value of the weighing component 70. This deviation is used as weight compensation data. When weighing during the discharge period of the next material feeding cycle, the deviation furnace charge weight signal value is added to reflect the true weight signal value of the furnace charge in the furnace top charge 50.

[0086] In some embodiments, at the end of the current discharge cycle, the weight signal value I of the material tank is read. tAfter calculation and analysis, it is recorded as the weighing compensation value I0, including:

[0087] Calculate I0 = I t -X, where X is the lower limit value set for the weighing facility, and I0 is set to ≥ 0;

[0088] When I0 > 0, record I0 as the weighing compensation value;

[0089] When I0 = 0, record I0 = -n as the weighing compensation value, where n is the number of consecutive cycles of the I0 = 0 condition. For the first cycle, n = 1; for the second cycle, n = 2; and for the nth cycle, n = n.

[0090] The value of I0 is obtained after calculation and analysis using the above method.

[0091] In some embodiments, if the compensated weight signal I of the furnace top hopper exceeds M, where M is the upper limit value set by the weighing facility and given by the weighing facility, then the weighing compensation value I0 is forced to be 0. Specifically, if the compensated weight value of the furnace charge exceeds the preset range value of the weighing facility of the furnace top hopper 50, then the weighing compensation value is not used as the weight data to compensate for the next material distribution cycle. In practice, if the compensated weighing signal exceeds the set range, an alarm signal is issued, forcing I0 to be 0, and the output signal unit outputs the original value of the weighing component 70.

[0092] In some embodiments, the blast furnace pressure value P is acquired each time material is discharged, and ΔP = P is calculated. t+1 -P t Therefore, if the absolute value of ΔP exceeds the preset value, the forced weighing compensation value I0 = 0. Specifically, the pressure data value inside the furnace top material tank 50 is acquired in real time. If the pressure difference data value exceeds the effective range of the pressure difference, the furnace material weighing compensation value is not used as the weight data to compensate for the next material distribution cycle. In practice, if the pressure difference value exceeds the set effective range of the pressure difference, the absolute value of the pressure difference should be from 0 to the set maximum pressure value. If it exceeds the effective range of the pressure, it is considered an abnormality, the weighing compensation unit does not perform compensation, and the output signal unit outputs the original value of the weighing component 70.

[0093] When abnormal phenomena such as system power failure, noise or vibration signal duration being too short or too long occur, the weighing compensation unit does not perform compensation, and the output signal unit directly outputs the original value of the weighing component 70.

[0094] Step S440: In the next round of material feeding cycle, the weighing compensation value is continuously compensated to the weighing value of the material tank;

[0095] Among them, compensation refers to adjusting the weighing value I of the hopper in the next discharge cycle. t+1The weight signal value I = I is summed with the weighing compensation value I0 and output to the furnace top material distribution model. t+1 +kI0, where k is called the compensation coefficient.

[0096] When the blast furnace top charging enters the next charging cycle, the recorded weighing compensation value I0 is continuously compensated to the weighing value of the charging hopper; specifically, the compensation refers to adjusting the weighing value I0 of the charging hopper within the current charging cycle. t+1 Summing the weight compensation value I0 recorded in the previous round, output I = I to the furnace top charging model. t+1 +kI0, where k is called the compensation coefficient. The compensated weight signal I is continuously output to the furnace top charging model. When I = X, the furnace top charging model can determine that the furnace material in the hopper is emptied, close the material flow regulating valve and the lower sealing valve, and the current charging cycle ends.

[0097] Specifically, the compensated weight value of the furnace top is transmitted to the furnace top material distribution model through the output signal unit. The furnace top material distribution model controls the material distribution process according to the weight value of the furnace top, so as to achieve the goal of precise material distribution and lean operation.

[0098] The weighing compensation method in this embodiment uses the weighing signal at the end of each batch of material feeding cycle as the compensation amount, which is then used to compensate for the next feeding cycle. This ensures that the weighing value is infinitely close to the actual weight of the furnace charge, helping the furnace top feeding model to accurately control the feeding process. Unlike weighing calibration approaches based on feeding technology and experience, this method can accurately capture the compensation amount based on noise and vibration signals, appropriately compensating the weighing data even if the blast furnace operation method or furnace top equipment differs. This achieves lean operation goals, helping the blast furnace improve production efficiency and reduce energy consumption. The compensation method and equipment in this solution are independent of the existing blast furnace top equipment and furnace top feeding model, requiring no modification to existing equipment and facilities.

[0099] Example 2

[0100] The difference between this embodiment and Embodiment 1 is that the structure of the compensation device for weighing blast furnace charge hoppers in this embodiment is as follows: Figure 5 As shown, with Figure 1 The difference in the compensation device is that two furnace top material tanks 50 are provided on the upper part of the blast furnace body 10. The two furnace top material tanks 50 are respectively provided with an upper sealing valve 51, an upper material flow valve 53, a pressure component 52 and a weighing component 70. The lower ends of the two furnace top material tanks 50 are respectively connected to a first material flow channel 31 and a second material flow channel 32. The first material flow channel 31 and the second material flow channel 32 are both connected to the central throat pipe 20. The first material flow channel 31 and the second material flow channel 32 are respectively provided with a material flow regulating valve 40 and a lower sealing valve 41.

[0101] In the specific implementation of this embodiment, the noise sensor 60 and the vibration sensor 61 are combined into one and are installed on the outer wall of the central throat tube 20.

[0102] In this embodiment, the blast furnace top equipment is a bell-less top equipment with a parallel ladle. The main difference is... Figure 5 After the charging cycle of one side of the blast furnace top charge hopper 50 is completed, the other side of the blast furnace top charge hopper 50 has completed its charging preparation (i.e., the top charge hopper 50 is already filled with furnace charge and pressure equalization has been completed, ready to start the latter half of the blast furnace charging operation at any time). The configuration and process of the two series of blast furnace tops are the same. After using the weighing compensation technology of this invention, a vibration sensor 61 and a noise sensor 60 are installed on the outer wall of the central throat pipe 20. The working method of a blast furnace charge hopper weighing compensation system corresponding to this compensation device is described in the appendix. Figure 6 The execution of a single charging process is roughly as follows: After the charging model receives the "charging" signal from the furnace body 10, the weighing data from the weighing component 70, after passing through the weighing compensation unit, is compensated by the output signal unit for the weight value of the furnace charge recorded in the furnace top hopper 50 at the end of the previous charging cycle. The output signal unit then transmits the sum of the weighed weight and compensation amount of the furnace charge in the furnace top hopper 50 to the charging model. Then, the lower sealing valve 41 is opened, at which point the furnace body 10 and the furnace top hopper 50 are connected by gas at the same pressure. Based on the charging matrix input from the process and the compensated weighing signal, the charging model controls the opening of the material flow regulating valve 40, controlling the discharge speed of the furnace charge in the furnace top hopper 50, and arranges the furnace charge to the weight and position specified by the process, achieving the charging target. After the weighing component 70 detects that all the furnace charge in the furnace top hopper 50 has been discharged, the charging model sends a "material empty" signal, ending one charging cycle.

[0103] Example 3

[0104] The difference between this embodiment and Embodiment 2 is that the structure of the furnace top material tank weighing compensation device in this embodiment is as follows: Figure 7 As shown, with Figure 5 The difference in the compensation device lies in that there are two noise sensors 60, which are respectively installed on the outer wall of the first material flow channel 31 and the outer wall of the second material flow channel 32; there are also two vibration sensors 61, which are respectively installed on the outer wall of the first material flow channel 31 and the outer wall of the second material flow channel 32. Since the noise and vibration signals collected by the sensors correspond one-to-one with the material tank, material tank weighing facilities, etc., physical matching is achieved during weighing compensation, realizing two independent material distribution systems and equipment on one furnace body 10; when one of the systems and furnace top material tank 50 equipment malfunctions or is under maintenance, the other equipment, including the weighing compensation system, can operate normally. The working method of a furnace top material tank weighing compensation system corresponding to this compensation device is described in Appendix Figure 8 implement.

[0105] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for weighing and compensating for a furnace top material hopper, characterized in that, include: Real-time noise and vibration signals at the center throat are acquired during the current fabric fabric cycle. The real-time noise signal and the real-time vibration signal are analyzed and processed. When the real-time noise signal is the target noise signal value and / or the real-time vibration signal is the target vibration signal value, the material feeding cycle within the current material feeding cycle is identified. At the end of the current discharge cycle, read the weight signal value I from the hopper. t After calculation and analysis, it is recorded as the weighing compensation value I0; In the next feeding cycle, the weighing compensation value is continuously compensated to the weighing value of the material tank; Among them, compensation refers to adjusting the weighing value I of the material tank in the next discharge cycle. t+1 The summation with the weighing compensation value I0 is used to output a weight signal value I=I to the furnace top material distribution model. t+1 +kI0, where k is called the compensation coefficient; Calculate I0=I t -X, where X is the lower limit value set for the weighing facility, and I0 is set to ≥ 0; When I0 > 0, record I0 as the weighing compensation value; When I0=0, record I0=-n as the weighing compensation value, where n is the number of consecutive cycles of the I0=0 working condition. The first cycle n=1, the second cycle n=2, and the nth cycle n=n. The charging cycle refers to the charging process from the start of loading the furnace charge into the furnace top charge hopper until all the furnace charge in the furnace top charge hopper is discharged into the blast furnace body through the central throat pipe. The furnace charge in the current charging cycle and the next charging cycle is the same furnace charge. The discharge cycle refers to the time period from when the material flow regulating valve is opened until all the furnace material in the hopper is emptied.

2. The method for weighing compensation of furnace top material hopper according to claim 1, characterized in that: In the next feeding cycle, the weighing compensation value is continuously compensated to the weighing value of the material tank, including: The furnace top feeding model continuously outputs a compensated weight signal value I. When I=X, the furnace top feeding model can determine that the furnace material in the hopper has been emptied, close the material flow regulating valve and the lower sealing valve, and the current feeding cycle ends.

3. The method for weighing compensation of furnace top material hopper according to claim 1, characterized in that: Real-time noise and vibration signals at the center throat are acquired during the current fabric cycle, including: The real-time noise signal is the noise signal generated by the friction and impact between the furnace charge and the inner wall of the central throat tube, and the real-time vibration signal is the vibration signal generated by the friction and impact between the furnace charge and the inner wall of the central throat tube.

4. The method for weighing compensation of furnace top material hopper according to claim 1, characterized in that: If the compensated weight signal value I of the furnace top hopper is greater than M, where M is the upper limit value set by the weighing facility, then the forced weighing compensation value I0 = 0, and the weighing compensation value is not used as weight data to compensate for the next material distribution cycle.

5. The method for weighing compensation of furnace top material hopper according to claim 1, characterized in that: The pressure value P inside the blast furnace is obtained each time material is discharged, and ΔP = P is calculated. t+1 -P t If the absolute value of △P exceeds the preset value, the forced weighing compensation value I0 = 0 will not be used as weight data to compensate for the next fabric cycle.

6. A weighing compensation system for a furnace top material hopper, characterized in that, For implementing a furnace top material tank weighing compensation method as described in any one of claims 1-5, the compensation system comprises: The signal acquisition unit acquires real-time noise and vibration signals at the center throat during the current fabric fabric cycle. The signal analysis unit analyzes and processes the real-time noise signal and the real-time vibration signal. When the real-time noise signal is the target noise signal value and / or the real-time vibration signal is the target vibration signal value, the current material discharge cycle is identified. At the end of the current material discharge cycle, the weighing compensation unit reads the weight signal value of the furnace top material tank, performs calculation and analysis, and records it as the weighing compensation value; and in the next material discharge cycle, the recorded weighing compensation value is continuously used to compensate the weight value of the material tank. The output signal unit outputs the compensated weighing value to the furnace top material distribution model.

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