CN117187457A - Furnace top charging bucket weighing compensation method, system and equipment - Google Patents
Furnace top charging bucket weighing compensation method, system and equipment Download PDFInfo
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- 238000005303 weighing Methods 0.000 title claims abstract description 179
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Abstract
The application provides a furnace top charging bucket weighing compensation method, a system and equipment, wherein the compensation method comprises the steps of acquiring a real-time noise signal and a real-time vibration signal at a central throat pipe in a current distribution period; and analyzing and processing the real-time noise signal and the real-time vibration signal, and identifying the discharging period of the current cloth period when the real-time noise signal is a target noise signal value and/or the real-time vibration signal is a target vibration signal value. Reading a furnace top charging bucket weight signal value when the current discharging period is finished, and recording the furnace top charging bucket weight signal value as a weighing compensation value after operation treatment; and after the blast furnace enters the next material distribution period, continuously compensating the weighing compensation value to the weighing value, and transmitting the compensated weighing value as an output value to the furnace top material distribution model. Compared with the prior art, the weighing compensation method in the scheme effectively improves the operation accuracy of each cloth period.
Description
Technical Field
The application belongs to the technical field of material distribution of blast furnaces or shaft furnaces in the metallurgical industry, and particularly relates to a furnace top charging bucket weighing compensation method, a system and equipment.
Background
The top charging system is one of four operating systems of the blast furnace, and determines the forward running state and the energy efficiency level of the blast furnace to a great extent. Most blast furnace top distribution models rely on real-time and accurate measurement of the weight of the furnace materials in a furnace top charging bucket, and the furnace top distribution models control the opening degree of a material flow regulating valve and the chute angle according to the weight of the furnace materials and a distribution matrix, so that the furnace materials are accurately arranged at a target position in the furnace to form a target material surface shape. The modern blast furnace mostly adopts high-pressure operation, and a pressure equalizing and discharging facility is arranged on a furnace top charging bucket, so that the pressure difference between the inside and the outside of the furnace is adapted, and meanwhile, the pressure in the blast furnace dynamically fluctuates according to the process conditions. For a furnace top charging bucket using a weighing sensor, under the actions of the supporting lifting force of the air pressure in the furnace and the blind plate force of the pressure equalizing and discharging facilities, the weighing facilities of the furnace top charging bucket cannot accurately weigh the weight of the furnace burden. The weight is usually greater than the actual weight of the burden in the furnace top charging bucket, resulting in a larger opening of the flow regulating valve and a faster actual burden distribution rate, which is manifested in that the target number of burden distribution turns set by the process is not completed, and the burden in the furnace top charging bucket is emptied. Further, the air flow distribution in the blast furnace is disturbed, the operation following performance is poor, and even the furnace condition is difficult to be operated. On the other hand, due to the weighing deviation, the furnace burden is practically emptied, but the material flow regulating valve is not closed at a later time, so that the operation efficiency of the furnace roof system is reduced.
The modern shaft furnace also adopts a high-top pressure operation system, and similar to the charging of the blast furnace, a charging tank at the top of the furnace is also provided with a uniform pressure discharging facility and a weighing facility, and the problem of inaccurate weighing of the charging tank also exists during the high-top pressure operation.
At present, the following furnace top charging bucket weighing compensation techniques exist:
1) The technology relies on specific equipment and operation technology, and has no wide adaptability.
2) The pure software model is used for carrying out scattered weighing on furnace burden through a plurality of weighing hoppers during material proportioning, collecting and summing the scattered weighing results, carrying out proper correction and then compensating furnace top weighing, and the technology is also an empirical model, depends on the accuracy of the scattered weighing, can accumulate the error of the scattered weighing results to different degrees, does not fundamentally solve the problem and has poor adaptability.
In summary, the prior art of furnace top weighing compensation systems has the disadvantages of poor adaptability, dependence on specific equipment and experience, and the like.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present application aims to provide a method, a system and a device for compensating weighing of a furnace top charging bucket, which are used for solving the problems of poor adaptability and dependence on specific devices and experience of the furnace top weighing compensation technology.
In the scheme, the blast furnace mainly uses coke and iron ore to smelt molten iron, the modern blast furnace generally loads the coke and the iron ore into the blast furnace independently, and part of the modern blast furnace uses pellet ore and high-pressure and high-temperature reducing gas to produce direct reduced iron, and an intermittent charging mode is adopted in order to keep the pressure in the furnace stable during charging. The top of the charging bucket is provided with a charging flow valve capable of isolating solid materials and an upper sealing valve capable of sealing gas, and the bottom of the charging bucket is provided with a material flow regulating valve capable of isolating and controlling the opening degree and a lower sealing valve capable of sealing gas. The method comprises the main steps of charging a blast furnace, firstly, closing a material flow regulating valve and a lower sealing valve at the bottom of a charging tank to cut off high-pressure gas in the furnace, opening a pressure discharging valve in a pressure assembly to discharge the pressure in the tank, opening a charging gate and an upper sealing valve to charge coke or iron ore into the charging tank, closing the charging flow valve and the upper sealing valve, opening a pressure equalizing valve of the pressure assembly to fill the high-pressure gas into the charging tank so that the pressure in the charging tank is approximately equal to the pressure in the blast furnace, conveying a weight signal to a furnace top distribution model (industrial control software) by a charging tank weighing sensor, opening the lower sealing valve by the furnace top distribution model according to the process requirement and the weight signal, regulating the opening of the material flow regulating valve to ensure that the materials in the charging tank are discharged at a constant speed, and entering the blast furnace through a central throat. The weighing compensation technology aims to convey accurate furnace burden weight signal values to a furnace roof distribution model and overcome weighing errors caused by furnace pressure and pressure equalizing and discharging facilities.
The burden distribution period refers to a burden distribution process from the start of charging burden in the furnace top charging bucket to the time when the burden in the furnace top charging bucket is completely discharged into a blast furnace body through the central throat pipe, wherein the burden in the current burden distribution period and the burden in the next burden distribution period are the same or similar.
The discharge cycle is the time period from when the flow regulating valve is opened (the burden begins to enter the central throat) to when the burden in the charging bucket is completely emptied.
To achieve the above object and other related objects, the present application provides the following technical solutions:
in a first aspect, a method of roof tank weight compensation includes:
acquiring a real-time noise signal and a real-time vibration signal at a central throat in a current distribution period;
analyzing and processing the real-time noise signal and the real-time vibration signal, and identifying a discharging period in the current cloth period when the real-time noise signal is a target noise signal value and/or the real-time vibration signal is a target vibration signal value;
reading a furnace top charging bucket weight signal value I when the current discharging period is finished t Calculate I 0 ＝I t X, X is the lower limit value set by the weighing means, given by the weighing means, recorded as the weighing compensation value I 0 ；
When the material distribution of the blast furnace top enters the material discharge period of the next material distribution period, the recorded weighing compensation value I 0 Continuously compensating the weighing value of the feeding tank;
continuously compensating the weighing compensation value of the feeding tank in the discharging period of the next round of material distribution;
wherein, the compensation refers to weighing value I of the charging bucket in the next discharging period t+1 And the weighing compensation value I 0 Summing, outputting a weight signal value I=I to the furnace roof distribution model t+1 +kI 0 K is called the compensation coefficient.
Optionally, at the end of the current discharge cycle, reading the bucket weight signal value I t Through operationAfter analysis, recorded as a weighing compensation value I 0 Comprising:
calculation I 0 ＝I t X, X is the lower limit value of the weighing plant setting, setting I 0 ≥0；
When said I is 0 > 0, record I 0 Is a weighing compensation value;
when said I is 0 When=0, record I 0 -n is the weighing compensation value, n is the I 0 The number of continuous cycles of the working condition=0, the first cycle n=1, the second cycle n=2, and so on, and the nth cycle n=n.
Optionally, continuously compensating the weighing compensation value for the feed tank weighing value during the discharging period of the next round of cloth comprises:
and continuously outputting the compensated weight signal value I to the furnace top distribution model, wherein when I=X, X is the lower limit value of the weighing facility, the furnace top distribution model can judge that the furnace burden in the charging bucket is emptied, and the material flow regulating valve and the lower sealing valve are closed, so that the distribution cycle of the furnace top distribution model is finished.
Optionally, acquiring the real-time noise signal and the real-time vibration signal at the central throat in the current distribution period includes:
the real-time noise signal is a noise signal generated by friction and impact between the furnace burden and the inner wall of the central throat, and the real-time vibration signal is a vibration signal generated by friction and impact between the furnace burden and the inner wall of the central throat.
Optionally, if the compensated furnace top charging bucket weight signal I > M, M is the upper limit value set by the weighing facility, and given by the weighing facility, the compensation value I is forced to be weighed 0 ＝0。
Optionally, the pressure value P in the blast furnace is obtained during each discharging, and Δp=p is calculated t+1 -P t If the absolute value of delta P exceeds the preset value, the compensation value I is forcibly weighed 0 ＝0。
In a second aspect, the present application also provides a roof tank weighing compensation system comprising:
the signal acquisition unit acquires a real-time noise signal and a real-time vibration signal at the central throat pipe in the current distribution period;
the signal analysis unit is used for analyzing and processing the real-time noise signal and the real-time vibration signal, and when the real-time noise signal is a target noise signal value and/or the real-time vibration signal is a target vibration signal value, the current discharging period is identified;
the weighing compensation unit reads the weight signal value of the furnace top charging bucket when the current discharging period is finished, and records the weight signal value as a weighing compensation value after operation analysis; continuously compensating the weighing value of the feeding tank by the recorded weighing compensation value in a discharging period of the next round of material distribution period;
and the output signal unit outputs the compensated weighing value to the furnace top distribution model.
In a third aspect, the present application also provides a furnace roof tank weighing compensation apparatus for participating in a furnace roof distribution process using a furnace roof tank weighing compensation method as described in any one of the preceding claims, the compensation apparatus comprising:
the top end of the furnace top charging bucket is provided with an upper sealing valve and a feeding flow valve, the bottom end of the furnace top charging bucket is provided with a flow regulating valve and a lower sealing valve, and the flow regulating valve is used for regulating the flow of furnace burden flowing through the central throat pipe; the furnace top charging bucket is provided with a pressure component for pressurizing and discharging pressure in the furnace top charging bucket and a weighing component for weighing furnace burden;
the central throat is communicated with the lower end of the furnace top charging bucket;
the blast furnace body is communicated with the central throat pipe;
and the central throat pipe is provided with a noise sensor and/or a vibration sensor.
Optionally, two furnace top charging tanks are arranged on the upper portion of the blast furnace body, the two furnace top charging tanks are respectively provided with an upper sealing valve, a feeding flow valve, a material flow regulating valve, a lower sealing valve, a pressure assembly and a weighing assembly, the lower ends of the two furnace top charging tanks are respectively communicated with a first material flow channel and a second material flow channel, and the first material flow channel and the second material flow channel are both communicated with the central throat.
Optionally, the number of the noise sensors is two, and the noise sensors are respectively arranged on the outer wall of the first material flow channel and the outer wall of the second material flow channel; the number of the vibration sensors is two, and the vibration sensors are respectively arranged on the outer wall of the first material flow channel and the outer wall of the second material flow channel.
According to the scheme, the real-time noise signal and the real-time vibration signal at the material flow channel during discharging are obtained, and the discharging period is judged and identified through the real-time noise signal and the real-time vibration signal, so that the situation that the materials in the material tank at the furnace top are discharged and continuously discharged is effectively avoided, and the working efficiency is effectively improved; and acquiring a weight signal value of the furnace top charging bucket at the end of the discharging period, and compensating the weight signal value as a weighing compensation value to the next charging period after operation treatment, so that the weight of the furnace burden output to the furnace top charging model in the next charging period is close to the actual weight of the furnace burden, thereby realizing the aims of accurate charging and lean operation, improving the production efficiency and reducing the energy consumption. Compared with the prior art, the discharging period is identified through the noise signal and the vibration signal in the scheme, and the cloth accuracy is effectively improved through the weight compensation method.
Drawings
FIG. 1 is a schematic diagram of an exemplary roof tank weighing compensation apparatus according to the present application;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a block diagram of a roof tank weighing compensation system according to an example of the application;
FIG. 4 is a flow chart of an exemplary method of weighing compensation for a roof tank in accordance with the present application;
FIG. 5 is a schematic diagram of another exemplary weighing compensation apparatus for a roof tank according to the present application;
FIG. 6 is a block diagram of a roof tank weighing compensation system according to another example of the application;
FIG. 7 is a schematic diagram of a top bucket weighing compensation apparatus according to yet another example of the application;
fig. 8 is a block diagram of a roof tank weighing compensation system according to yet another example of the application.
The reference numerals in the embodiments include:
the blast furnace body 10, the distribution chute 11, the distribution gear box 12, the central throat 20, the first material flow channel 31, the second material flow channel 32, the material flow regulating valve 40, the lower sealing valve 41, the furnace top charging bucket 50, the upper sealing valve 51, the pressure component 52, the upper material flow valve 53, the noise sensor 60, the vibration sensor 61 and the weighing component 70.
Detailed Description
Other advantages and effects of the present application will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present application with reference to specific examples. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application.
Further advantages and effects of the present application will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present application by way of illustration, and only the components related to the present application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
In the following description, numerous details are set forth in order to provide a more thorough explanation of embodiments of the present application, it will be apparent, however, to one skilled in the art that embodiments of the present application 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, in order to avoid obscuring the embodiments of the present application.
Example 1
Fig. 1 and 2 are diagrams showing a compensation apparatus for weighing a blast furnace tank according to an exemplary embodiment of the present application, the compensation apparatus comprising:
a top tank 50, wherein an upper sealing valve 51 and a feeding flow valve 53 are arranged at the top end of the top tank 50, a flow regulating valve 40 and a lower sealing valve 41 are arranged at the bottom end of the top tank 50, and the flow regulating valve 40 is used for regulating the flow rate of furnace burden flowing through the central throat pipe 20; the furnace top charging bucket 50 is provided with a pressure assembly 52 for pressurizing and discharging the furnace top charging bucket 50 and a weighing assembly 70 for weighing furnace burden;
a central throat 20, wherein the central throat 20 is communicated with the lower end of the furnace top charging bucket 50;
a blast furnace body 10, wherein the blast furnace body 10 is communicated with the central throat pipe 20;
wherein, the noise sensor 60 and the vibration sensor 61 are arranged on the central throat pipe 20.
Specifically, the weighing assembly 70 is typically comprised of a plurality of load cells and 1 set of weighing scales through which the weighing values can be read. The pressure assembly 52 is a uniform pressure and discharge device for pressurizing and discharging the furnace top charging tank 50; when the top tank 50 is pressurized, the upper sealing valve 51 and the lower sealing valve 41 are closed, and the inside of the top tank 50 can be sealed. In the device, a furnace top distribution model is arranged for controlling the opening, closing, signal receiving, judging and the like of the structures such as the upper sealing valve 51, the upper material flow valve 53, the material flow regulating valve 40, the lower sealing valve 41, the pressure component 52, the weighing component 70 and the like.
The primary cloth cycle is as follows: the weighing assembly 70 detects that the weight signal of the furnace burden in the furnace roof charging bucket 50 reaches the lower limit value, the furnace roof distribution model sends out a material empty signal, the material flow regulating valve 40 and the lower sealing valve 41 are closed, the pressure discharging valve of the pressure assembly 52 is opened, and the pressure of the furnace roof charging bucket 50 is converted into normal pressure. Then, the upper sealing valve 51 and the feeding flow valve 53 are opened, the furnace burden falls into the furnace roof tank 50 through the feeding flow valve 53 under the action of gravity, after the furnace roof tank 50 is filled with the furnace burden, the feeding flow valve 53 and the upper sealing valve 51 are closed, the pressure discharging valve in the pressure assembly 52 is closed, and the pressure equalizing valve is opened, so that the pressure in the furnace roof tank 50 is increased to be approximately equal to the pressure in the furnace body 10. After the furnace roof distribution model receives a charging signal sent by the furnace body 10 of the blast furnace, the weighing assembly 70 conveys the weighing weight of the furnace burden in the charging bucket to the furnace roof distribution model, and the lower sealing valve 41 is opened, at the moment, the furnace body 10 of the blast furnace is communicated with the gas in the charging bucket 50 of the furnace roof, and the pressure is the same; the furnace top distribution model controls the opening of the material flow regulating valve 40 in real time according to a distribution matrix input by a process and a real-time weight signal transmitted by the weighing assembly 70, controls the discharging speed of the furnace burden in the furnace top charging bucket 50 through the central throat pipe 20, and arranges the furnace burden to the weight and the position designated by the process so as to realize the distribution target; after the weighing assembly 70 monitors that all the burden in the charging bucket is discharged, the burden distribution model sends out a burden empty signal.
In the weighing compensation equipment in the scheme, in the concrete embodiment, after a charging bucket weighing compensation type technical product is arranged on the top of the blast furnace, a vibration sensor 61 and/or a noise sensor 60 are arranged on the outer wall of the central throat pipe 20 or nearby space, and noise and vibration generated when furnace burden in the material distribution process rubs and impacts with the inner wall of the central throat pipe 20 are collected by the noise sensor 60 and the vibration sensor 61 and then are transmitted to a signal acquisition unit. The difference of the primary distribution period is that after the furnace top distribution model receives a charging signal sent by the blast furnace body 10, the weighing component 70 outputs a charging weight signal value in a charging bucket to the compensation unit, the output signal unit compensates a weighing compensation value recorded in the previous distribution period, and the sum of the weighing weight and the weighing compensation value of the charging in the charging bucket is conveyed to the furnace top distribution model; the lower sealing valve 41 is opened, and at this time, the blast furnace body 10 is communicated with the gas in the furnace top charging bucket 50, and the pressure is the same; the furnace top distribution model controls the opening of a material flow regulating valve 40 according to a distribution matrix input by a process and a compensated weighing signal, controls the discharging speed of furnace burden in a furnace top charging bucket 50 through a central throat pipe 20, and arranges the furnace burden to the weight and the position designated by the process so as to realize a distribution target; after the weighing assembly 70 monitors that all the burden in the charging bucket is discharged, the burden distribution model sends out a burden empty signal.
It should be noted that the compensation can be performed only if the burden charged into the blast furnace in two consecutive burden distribution periods is the same or approximately the same, and if the burden charged into the blast furnace in two consecutive burden distribution periods is different, the compensation is not performed.
FIG. 3 is a block diagram of a compensating system for weighing a roof tank according to an exemplary embodiment of the present application, which may be implemented using the compensating apparatus for weighing a roof tank according to FIG. 1, it being understood that the weighing compensating system may be implemented using and performed in an environment using other blast furnace tanks, and the present embodiment is not limited to the implementation environment and apparatus to which the method is applicable.
The furnace top charging bucket weighing compensation system corresponds to the furnace top charging bucket weighing compensation device of the blast furnace in the embodiment one by one, and as shown in fig. 3, the compensation system comprises a signal acquisition unit, a signal analysis unit, a weighing compensation unit, an output signal unit, and the following detailed description of each functional unit is as follows:
a signal acquisition unit for acquiring a real-time noise signal and a real-time vibration signal at the center throat 20 in a current distribution period;
the signal analysis unit is used for analyzing and processing the real-time noise signal and the real-time vibration signal, and when the real-time noise signal is a target noise signal value and/or the real-time vibration signal is a target vibration signal value, the current discharging period is identified;
the weighing compensation unit acquires a furnace burden weight signal value of the furnace roof charging bucket 50 when the current material distribution period is finished, and records the furnace burden weight signal value as a weighing compensation value after operation analysis; continuously compensating the weighing value of the feeding tank by the recorded weighing compensation value in a discharging period of the next round of material distribution period;
and the output signal unit outputs the compensated weighing value to the furnace top distribution model.
It should be noted that, the furnace top tank weighing compensation system provided by the foregoing embodiment and the furnace top tank weighing compensation method provided by the foregoing embodiment belong to the same concept, and the specific manner in which each unit performs the operation has been described in detail in the method embodiment, which is not repeated herein. In practical application, the furnace top charging bucket weighing compensation system provided by the embodiment can distribute the functions by different functional units according to the needs, namely, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above, and the furnace top charging bucket weighing compensation system is not limited in this place.
As shown in fig. 4, in an exemplary embodiment, a method for compensating weighing of a top tank at least includes steps S410 to S440, which are described in detail below:
step S410, acquiring a real-time noise signal and a real-time vibration signal at the central throat 20 in the current cloth period;
wherein, the distribution period is the whole distribution process from the start of charging the furnace burden in the furnace roof charging bucket 50 to the start of discharging the furnace burden in the furnace roof charging bucket 50 into the blast furnace body 10 through the central throat pipe 20; wherein the burden in the current burden distribution cycle and the next burden distribution cycle are of the same or similar type. In the actual implementation process, the material distribution period refers to the period of adding the same or nearly the same materials into the blast furnace by the furnace top material distribution equipment, and the material distribution period of the same materials can be implemented continuously or at intervals.
In some embodiments, the real-time noise signal is a noise signal generated by friction and impact between the furnace burden and the inner wall of the central throat 20, and the real-time vibration signal is a vibration signal generated by friction and impact between the furnace burden and the inner wall of the central throat 20.
This step occurs during a single burden distribution cycle, and specifically, during the control of the discharge of burden from the burden tank 50 through the central throat 20, the real-time noise signal and the real-time vibration signal at the central throat 20 are continuously acquired through the noise sensor 60 and the vibration sensor 61 by the vibration sensor 61 and the noise sensor 60 installed at or near the outer wall of the central throat 20.
Step S420, analyzing and processing the real-time noise signal and the real-time vibration signal, and identifying a discharging cycle in the current cloth cycle when the real-time noise signal is a target noise signal value and/or the real-time vibration signal is a target vibration signal value;
wherein, the discharging period refers to the period from the opening of the material flow regulating valve (the starting of the charging material enters the central throat pipe) to the complete emptying of the charging material in the charging bucket.
Specifically, the characteristic parameters of the real-time noise signal and the real-time vibration signal can be calculated and extracted, and the characteristic parameters are analyzed and processed, so that the discharge starting time and the discharge ending time can be accurately identified, and the discharge time period can be recorded; wherein the calculation, analysis and selection of the characteristic parameters can be accomplished by a signal analysis unit.
The analysis of the characteristic parameters is illustrated herein. In this case, the discharge process takes place intermittently, the noise or vibration signal generated by the furnace friction or impact device being a function of amplitude and time, and of amplitude and frequency. The key of analyzing the processing signal is to identify the amplitude characteristic at the target frequency and the relation between the amplitude of the specific frequency and the time, set the target accordingly, and identify the start and end time of the discharging process, namely, identify the discharging period. In the actual implementation process, the influence of factors such as high-pressure gas flow in the furnace, heavy valve start-stop, furnace charge transportation, furnace body environment wind noise and the like is reduced by adopting a reasonable algorithm model. In addition, in this case, the noise sensor and the vibration sensor are used simultaneously, and the two sensors work simultaneously, but are backup to each other, and any path can independently complete the working contents of the signal acquisition unit and the signal analysis processing unit, so as to complete the objective of step S410 and step S420. In the case, the noise sensor and the vibration sensor can work simultaneously, the signal acquisition unit and the signal analysis processing unit independently complete tasks, and the signal for identifying the beginning of the discharging period is selected as a main signal source.
It should be noted that in this embodiment, a more detailed logic analysis may be used to process the real-time noise signal and the real-time vibration signal, and the discharging period is accurately identified by the result of the analysis, so as to record the starting time and the ending time of the discharging period. Through accurate discernment discharge cycle, according to the record of each moment symmetry weight signal, can combine to apply to next cloth cycle in, make the efficient accurate completion cloth of next cycle.
Step S430, when the current discharging period is over, reading the charging bucket weight signal value I t After operation and analysis, the weighing compensation value I is recorded 0 ；
Judging that no furnace burden is discharged at the central throat 20 through the vibration signal and the noise signal, and finishing the current discharging period, wherein a furnace burden weight signal value is still output on the weighing assembly 70; as mentioned above, since the pressure in the furnace top tank 50 and the blind force of the pressure assembly 52 during the discharging process of the furnace top tank 50 affect the weighing of the furnace burden in the furnace top tank 50 by the weighing assembly 70, when the weight signal value of the furnace burden reaches the lower limit value set by the weighing assembly 70 after the furnace burden is discharged from the furnace top tank 50, but in practice is generally higher than the lower limit value, the weight signal value of the furnace burden is the deviation value of the weighing assembly 70, and the deviation is taken as weight compensation data, and the weight signal value of the furnace burden is added when the furnace burden is weighed during the discharging process of the next burden distribution period, so that the actual weight signal value of the furnace burden in the furnace top tank 50 can be reflected.
In some embodiments, the bucket weight signal value I is read at the end of the current discharge cycle t After operation and analysis, the weighing compensation value I is recorded 0 Comprising:
calculation I 0 ＝I t X, X is the lower limit value of the weighing plant setting, setting I 0 ≥0；
When said I is 0 > 0, record I 0 Is a weighing compensation value;
when said I is 0 When=0, record I 0 -n is the weighing compensation value, n is the I 0 The number of continuous cycles of the working condition=0, the first cycle n=1, the second cycle n=2, and the nth cycle n=n.
Through the abovePair I 0 And performing calculation analysis to obtain a value.
In some embodiments, if the compensated top charging bucket weight signal I > M, M is the upper limit value set by the weighing facility, the compensation value I is forced to be weighed if the upper limit value is given by the weighing facility 0 =0. Specifically, if the compensated burden weight value exceeds the preset range value of the weighing facility of the furnace top charging bucket 50, the weighing compensation value is not used as the weight data to be compensated in the next burden distribution cycle. When in implementation, if the compensated weighing signal exceeds the set range, an alarm signal is sent out to force I 0 The output signal unit outputs the original value of the weighing module 70 =0.
In some embodiments, the pressure value P in the blast furnace is obtained at each discharge, and Δp=p is calculated t+1 -P t If the absolute value of delta P exceeds the preset value, the compensation value I is forcibly weighed 0 =0. Specifically, the pressure data value in the furnace top charging bucket 50 is obtained in real time, and if the pressure difference data value exceeds the pressure difference effective range value, the furnace burden weighing compensation value is not used as the weight data to be compensated in the next material distribution period. In practice, the range of the pressure difference exceeds the set effective range of the pressure difference, the absolute value of the pressure difference is 0 to the set maximum value of the pressure, and if the absolute value exceeds the effective range of the pressure, the weighing compensation unit does not compensate, and the output signal unit outputs the original value of the weighing assembly 70.
When abnormal phenomena such as system outage, too short or too long duration of noise or vibration signals occur, the weighing compensation unit does not compensate, and the output signal unit directly outputs the original value of the weighing assembly 70.
Step S440, continuously compensating the weighing compensation value of the feeding tank in the discharging period of the next round of cloth;
wherein, the compensation refers to the weighing value I of the charging bucket in the next discharging period t+1 And the weighing compensation value I 0 Summing, outputting a weight signal value I=I to the furnace roof distribution model t+1 +kI 0 K is called the compensation coefficient.
The blast furnaceWhen the top cloth enters the discharging period of the next cloth period, the recorded weighing compensation value I 0 Continuously compensating the weighing value of the feeding tank; specifically, the compensation refers to weighing value I of a charging bucket in the material distribution period of the round t+1 With the weight compensation value I recorded in the previous round 0 Summing, outputting I=I to a furnace roof distribution model t+1 +kI 0 K is called the compensation coefficient. And continuously outputting a compensated weight signal I to the furnace top distribution model, wherein when I=X, the furnace top distribution model can judge that the furnace burden in the charging bucket is emptied, and the material flow regulating valve and the lower sealing valve are closed, so that the distribution cycle of the present wheel is finished.
Specifically, the compensated furnace top weight value is conveyed to a furnace top distribution model through an output signal unit, and the furnace top distribution model controls the distribution process according to the furnace top weight value, so that the aims of accurate distribution and lean operation are achieved.
According to the weighing compensation method, a weighing signal at the end of actual discharging of each batch of material distribution period is used as a compensation quantity to be compensated to the next material distribution period, so that the weighing value is infinitely close to an actual weight value of furnace burden, and the material distribution process of the furnace roof material distribution model is accurately controlled. The weighing calibration method is different from weighing calibration thought based on a material distribution process and experience, even if the blast furnace operation mode or furnace top equipment is different, accurate compensation quantity can be captured according to noise and vibration signals, weighing data can be properly compensated, the lean operation target is realized, the blast furnace is helped to promote production efficiency, and energy consumption is reduced. The compensation method and the compensation equipment in the scheme are independent of the existing blast furnace top equipment and the furnace top distribution model, and the existing equipment and facilities do not need to be modified.
Example 2
The difference between this embodiment and embodiment 1 is that, as shown in fig. 5, a compensating apparatus for weighing a blast furnace tank in this embodiment is different from the compensating apparatus in fig. 1 in that two top tanks 50 are disposed at the upper portion of the blast furnace body 10, two top tanks 50 are respectively provided with an upper sealing valve 51, an upper flow valve 53, a pressure assembly 52 and a weighing assembly 70, the lower ends of two top tanks 50 are respectively communicated with a first flow channel 31 and a second flow channel 32, the first flow channel 31 and the second flow channel 32 are respectively communicated with the central throat 20, and the first flow channel 31 and the second flow channel 32 are respectively provided with a flow regulating valve 40 and a lower sealing valve 41.
In the implementation of this embodiment, the noise sensor 60 and the vibration sensor 61 are one, and are disposed on the outer wall of the central throat 20.
In this embodiment, the blast furnace top equipment is a parallel tank bell-less furnace top equipment, and the main difference is that after the material distribution period of the furnace top material tank 50 on one side in fig. 5 is finished, the material distribution preparation of the furnace top material tank 50 on the other side is already finished (that is, the furnace top material tank 50 is already filled with furnace burden in advance, the equalizing work is finished, and the latter half operation of blast furnace material distribution can be started at any time), and the configuration and the flow of two series of blast furnace top are the same. After the weighing compensation technical scheme of the application is used, a vibration sensor 61 and a noise sensor 60 are arranged on the outer wall of the central throat pipe 20. The working method of the compensation system for weighing the blast furnace material tank corresponding to the compensation device is carried out according to the figure 6, and the one-time charging process is approximately carried out as follows in sequence: after the material distribution model receives a charging signal sent by the furnace body 10, the weighing data of the weighing assembly 70 passes through a weighing compensation unit, and after the weighing data of the weighing assembly compensates the weight value of the furnace burden recorded by the furnace roof charging bucket 50 when the previous round of material distribution is finished, the weighing weight and the compensation quantity of the furnace burden in the furnace roof charging bucket 50 are fed to the furnace roof material distribution model; then the lower sealing valve 41 is opened, and at the moment, the furnace body 10 is communicated with the gas in the furnace top charging bucket 50, and the pressure is the same; the material distribution model controls the opening of the material flow regulating valve 40 according to the material distribution matrix input by the process and the compensated weighing signal, controls the discharging speed of the furnace burden in the furnace top charging bucket 50, and arranges the furnace burden to the weight and the position designated by the process so as to realize the material distribution target; after the weighing assembly 70 monitors that the furnace burden in the furnace top charging bucket 50 is completely discharged, the material distribution model sends out a material empty signal, and one material distribution period is finished.
Example 3
The difference between this embodiment and embodiment 2 is that a top charging bucket weighing compensation apparatus structure in this embodiment is shown in fig. 7, and the difference between this embodiment and the compensation apparatus in fig. 5 is that two noise sensors 60 are respectively disposed on the outer wall of the first material flow channel 31 and the outer wall of the second material flow channel 32; the number of vibration sensors 61 is two, and they are respectively provided on the outer wall of the first flow path 31 and the outer wall of the second flow path 32. Because the noise and vibration signals acquired by the sensor are in one-to-one correspondence with the charging bucket, the charging bucket weighing facility and the like, physical matching is realized during weighing compensation, and two independent cloth systems and devices are arranged on one furnace body 10; when one of the system and roof tank 50 devices fails, or one of the devices is in an inspection condition, the other device may be operated normally with the weight compensation system. The working method of the furnace top charging bucket weighing compensation system corresponding to the compensation device is implemented according to the attached figure 8.
The above embodiments are merely illustrative of the principles of the present application and its effectiveness, and are not intended to limit the application. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the application. Accordingly, it is intended that all equivalent modifications and variations of the application be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A method of weighing compensation for a roof can, comprising:
acquiring a real-time noise signal and a real-time vibration signal at a central throat in a current distribution period;
analyzing and processing the real-time noise signal and the real-time vibration signal, and identifying a discharging period in the current cloth period when the real-time noise signal is a target noise signal value and/or the real-time vibration signal is a target vibration signal value;
reading the weight signal value I of the charging bucket when the current discharging period is finished t After operation and analysis, the weighing compensation value I is recorded 0 ；
Continuously compensating the weighing compensation value of the feeding tank in the discharging period of the next round of material distribution;
wherein, the compensation refers to weighing value I of the charging bucket in the next discharging period t+1 And the weighing compensation value I 0 Summing, outputting a weight signal value I=I to the furnace roof distribution model t+1 +kI 0 K is called the compensation coefficient.
2. The method for weighing compensation of a furnace roof tank according to claim 1, wherein: reading the weight signal value I of the charging bucket when the current discharging period is finished t After operation and analysis, the weighing compensation value I is recorded 0 Comprising:
calculation I 0 ＝I t X, X is the lower limit value of the weighing plant setting, setting I 0 ≥0；
When said I is 0 > 0, record I 0 Is a weighing compensation value;
when said I is 0 When=0, record I 0 -n is the weighing compensation value, n is the I 0 The number of continuous cycles of the working condition=0, the first cycle n=1, the second cycle n=2, and the nth cycle n=n.
3. The method for weighing compensation of a furnace roof tank according to claim 1, wherein: continuously compensating the weighing compensation value for the feed tank weighing value during the discharge cycle of the next round of material distribution, comprising:
and continuously outputting the compensated weight signal value I to the furnace top distribution model, and when I=X, judging that the furnace charge in the charging bucket is emptied by the furnace top distribution model, closing the material flow regulating valve and the lower sealing valve, and ending the distribution cycle of the round.
4. The method for weighing compensation of a furnace roof tank according to claim 1, wherein: acquiring a real-time noise signal and a real-time vibration signal at a central throat in a current cloth period, including:
the real-time noise signal is a noise signal generated by friction and impact between the furnace burden and the inner wall of the central throat, and the real-time vibration signal is a vibration signal generated by friction and impact between the furnace burden and the inner wall of the central throat.
5. The method for weighing compensation of a furnace roof tank according to claim 1, wherein: if the compensated furnace top charging bucket weight signal I is more than M, and M is the upper limit value set by a weighing facility, the forced weighing compensation value I 0 ＝0。
6. The method for weighing compensation of a furnace roof tank according to claim 1, wherein: obtaining the pressure value P in the blast furnace during each discharging, and calculating DeltaP=P t+1 -P t If the absolute value of delta P exceeds the preset value, the compensation value I is forcibly weighed 0 ＝0。
7. The utility model provides a furnace roof material jar compensation system that weighs which characterized in that:
the signal acquisition unit acquires a real-time noise signal and a real-time vibration signal at the central throat pipe in the current distribution period;
the signal analysis unit is used for analyzing and processing the real-time noise signal and the real-time vibration signal, and when the real-time noise signal is a target noise signal value and/or the real-time vibration signal is a target vibration signal value, the current discharging period is identified;
the weighing compensation unit reads the weight signal value of the furnace top charging bucket when the current discharging period is finished, and records the weight signal value as a weighing compensation value after operation analysis; continuously compensating the weighing value of the feeding tank by the recorded weighing compensation value in a discharging period of the next round of material distribution period;
and the output signal unit outputs the compensated weighing value to the furnace top distribution model.
8. A furnace roof tank weighing compensation apparatus for performing a distribution cycle using a furnace roof tank weighing compensation method according to any one of claims 1 to 6, said compensation apparatus comprising:
the top end of the furnace top charging bucket is provided with an upper sealing valve and a feeding flow valve, the bottom end of the furnace top charging bucket is provided with a flow regulating valve and a lower sealing valve, and the flow regulating valve is used for regulating the flow of furnace burden flowing through the central throat pipe; the furnace top charging bucket is provided with a pressure component for pressurizing and discharging pressure in the furnace top charging bucket and a weighing component for weighing furnace burden;
the central throat is communicated with the lower end of the furnace top charging bucket;
the blast furnace body is communicated with the central throat pipe;
and the outer wall of the central throat pipe is provided with a noise sensor and/or a vibration sensor.
9. The roof tank weighing compensation apparatus of claim 8 wherein: the upper part of the blast furnace body is provided with two furnace top charging tanks, the two furnace top charging 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 furnace top charging tanks are respectively communicated with a first material flow channel and a second material flow channel, and the first material flow channel and the second material flow channel are both communicated with the central throat pipe.
10. The roof tank weighing compensation apparatus of claim 9 wherein: the two noise sensors are respectively arranged on the outer wall of the first material flow channel and the outer wall of the second material flow channel; the number of the vibration sensors is two, and the vibration sensors are respectively arranged on the outer wall of the first material flow channel and the outer wall of the second material flow channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311212958.2A CN117187457A (en) | 2023-09-19 | 2023-09-19 | Furnace top charging bucket weighing compensation method, system and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311212958.2A CN117187457A (en) | 2023-09-19 | 2023-09-19 | Furnace top charging bucket weighing compensation method, system and equipment |
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| Publication Number | Publication Date |
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| CN117187457A true CN117187457A (en) | 2023-12-08 |
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| CN202311212958.2A Pending CN117187457A (en) | 2023-09-19 | 2023-09-19 | Furnace top charging bucket weighing compensation method, system and equipment |
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| Country | Link |
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| CN (1) | CN117187457A (en) |
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- 2023-09-19 CN CN202311212958.2A patent/CN117187457A/en active Pending
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