CN111471819A - Method and system for regulating and controlling material distribution system of blast furnace - Google Patents
Method and system for regulating and controlling material distribution system of blast furnace Download PDFInfo
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Abstract
The invention provides a regulation and control method and a regulation and control system for a blast furnace burden distribution system. The regulation and control method comprises the steps of obtaining material distribution data of a single material distribution stage; establishing a long-term database; generating a material distribution system regulation and control instruction, and extracting material distribution data of each material distribution stage in two periods backtracking from the instruction designated moment from a long-term database; calculating the variation of the extracted furnace condition characterization parameters in each distribution stage, respectively calculating the next accumulated times and the previous accumulated times when the variation in the next period and the previous period meets the target condition, and calculating the change rate of the next accumulated times compared with the previous accumulated times; when the rate of change meets furnace condition degradation criteria: and calculating the variation amplitude of each cloth regulation parameter in the next period compared with the previous period, screening out the cloth regulation parameter with the largest variation amplitude, and adjusting the cloth regulation parameter in the current cloth system to approach the previous period to obtain the cloth system for the subsequent cloth stage.
Description
Technical Field
The invention belongs to the technical field of smelting blast furnace control, and relates to a regulation and control method and a regulation and control system for a blast furnace burden distribution system.
Background
Blast furnace burden distribution generally refers to a process of distributing charging materials such as coke and ore into a high-temperature and high-pressure furnace body from a charging bucket in a certain manner. Generally, the blast furnace burden distribution is performed in successive cycles, specifically taking the burden distribution of coke and ore as an example: firstly, pouring ores into a charging bucket through a feeding device, and opening a material flow valve at the lower end of the charging bucket at a preset opening degree to enable the ores to flow out of the charging bucket and fall onto an inclined chute, and then to slide downwards along the chute to the charge level in the furnace, so that the distribution of the ores is realized; then closing the material flow valve, finishing blanking at intervals, then pouring coke into the charging bucket through the feeding device, opening the material flow valve at the lower end of the charging bucket at a preset opening degree, so that the coke flows out of the charging bucket and falls onto an inclined chute, and then slides downwards along the chute to the material level in the furnace, thereby realizing the distribution of the coke; and closing the material flow valve, finishing the blanking at intervals, then repeating the material distribution of the ore, and repeating the process.
In the production of blast furnaces, a material distribution system is an important aspect influencing the smooth operation and economic indexes of the blast furnaces. Specifically, each time of material distribution, the material distribution device works according to preset parameter standards, for example, the chute rotates the material distribution according to a preset inclination angle and a preset number of turns to influence the material distribution amount at the corresponding position of the furnace throat, for example, the material flow valve distributes the material according to a preset opening degree to influence the material distribution amount and the material distribution speed at the corresponding position of the furnace throat, and the like. Under the theoretical situation, if the material is distributed according to a certain distribution system, and the furnace condition is abnormal due to the material distribution reason, the distribution system needs to be adjusted to meet the smooth requirement of the blast furnace.
However, on one hand, since the material distribution in the blast furnace production is not continuous in successive cycles, the method does not have a technology for directly evaluating the material distribution stage by independently grabbing the material distribution stage from the whole blast furnace production, and even if furnace condition characterizing parameters such as temperature and airflow influenced by the material distribution condition are monitored, the rationality of the material distribution system cannot be effectively determined because the furnace condition characterizing parameters are influenced by other factors besides the material distribution condition, and only the judgment can be given and the trial adjustment can be performed on the material distribution system by excessively depending on the self experience of an operator.
On the other hand, when the material distribution system is adjusted in the material distribution process, the prior art cannot effectively and reliably determine whether the adjustment of the material distribution system is reasonable, cannot make a prospective evaluation before the abnormal furnace condition to prevent the occurrence of a serious abnormality, and can only rely on the self-experience of an operator to presume the reason when the obvious abnormality occurs.
Disclosure of Invention
The invention aims to at least solve the technical problem that the regulation and control process of a material distribution system in the prior art excessively depends on self experience to cause poor reliability, and provides a regulation and control method and a regulation and control system of a material distribution system of a blast furnace.
In order to achieve one of the above objects, an embodiment of the present invention provides a method for regulating a burden distribution system of a blast furnace, comprising,
acquiring material distribution data of a single material distribution stage: collecting action signals of a material distribution device, and determining the starting time and the ending time of a material distribution stage; collecting material distribution regulation and control parameters in a material distribution system adopted in the material distribution stage; collecting furnace condition characterization parameters at the starting time and the ending time of a material distribution stage;
establishing a long-term database based on the acquired material distribution data of each material distribution stage;
generating a material distribution system regulation and control instruction, and extracting material distribution data of each material distribution stage in two periods backtracking from the instruction designated moment from the long-term database;
calculating the variation of the extracted furnace condition characterization parameters in each material distribution stage, calculating the next accumulated times when the variation meets the target condition in the next period and the previous accumulated times when the variation meets the target condition in the previous period, and calculating the change rate of the next accumulated times compared with the previous accumulated times;
when the rate of change meets furnace condition degradation criteria: and calculating the variation amplitude of each cloth regulation parameter in the next period compared with the previous period, screening out the cloth regulation parameter with the largest variation amplitude, and adjusting the cloth regulation parameter in the current cloth system to approach the previous period to obtain the cloth system for the subsequent cloth stage.
As a further improvement of the embodiment of the present invention, the step of "determining the start time and the end time of the material distribution stage based on the operation signal of the material distribution device" includes:
when an opening action signal of a material flow valve of the charging bucket is acquired, determining the starting moment of a material distribution stage, and when a closing action signal of the material flow valve of the charging bucket is acquired, determining the ending moment of the material distribution stage; alternatively, the first and second electrodes may be,
when a lifting movement signal of the mechanical stock rod is acquired, determining the starting time of a material distribution stage, and when a releasing movement signal of the mechanical stock rod is acquired, determining the finishing time of the material distribution stage; alternatively, the first and second electrodes may be,
after collecting the lifting movement signal of the mechanical measuring rod, when collecting the opening movement signal of the material flow valve of the charging bucket in a certain time interval, determining the starting moment of the material distribution stage, and after collecting the closing movement signal of the material flow valve of the charging bucket, when collecting the lowering movement signal of the mechanical measuring rod in a certain time interval, determining the ending moment of the material distribution stage.
As a further improvement of the embodiment of the present invention, in the step of "generating a material distribution system regulation and control instruction, and extracting material distribution data of each material distribution stage in two cycles back from the instruction designated time" from the long-term database, the material distribution system regulation and control instruction is periodically generated, and the material distribution data of each material distribution stage in two cycles back from the instruction designated time is extracted from the long-term database with the generation time of the material distribution system regulation and control instruction as the instruction designated time.
As a further improvement of an embodiment of the present invention, the variation amplitude of each cloth control parameter in the next period compared to the previous period is a variation rate of an average value of the cloth control parameter in the next period compared to an average value of the cloth control parameter in the previous period.
As a further improvement of one embodiment of the invention, the distribution regulation and control parameters comprise a chute maximum distribution inclination angle and a position distribution regulation and control parameter corresponding to a blast furnace radial distribution position;
the furnace condition characterization parameters comprise position furnace condition characterization parameters corresponding to the radial material distribution position of the blast furnace;
in the method of regulation:
calculating the variation of the position furnace condition characterization parameters in each material distribution stage, calculating the next accumulated times when the variation meets the target condition in the next period and the previous accumulated times when the variation meets the target condition in the previous period, and calculating the change rate of the next accumulated times compared with the previous accumulated times; when the rate of change meets furnace condition degradation criteria: respectively calculating the variation amplitude of the chute maximum material distribution inclination angle and the position material distribution regulation and control parameter in the next period compared with the previous period, screening out one material distribution regulation and control parameter with the maximum variation amplitude from the chute maximum material distribution inclination angle and the position material distribution regulation and control parameter, and adjusting the material distribution regulation and control parameter in the current material distribution system to approach the previous period so as to obtain the material distribution system for the subsequent material distribution stage.
As a further improvement of an embodiment of the present invention, the distribution control parameter includes a maximum distribution inclination angle of the chute, and further includes an edge distribution amount of a plurality of furnace materials and/or a central distribution amount of a plurality of furnace materials;
the furnace condition characterization parameters comprise secondary edge furnace condition characterization parameters and/or secondary center furnace condition characterization parameters;
in the method of regulation:
calculating the variation of the secondary edge furnace condition characterization parameters in each material distribution stage, calculating the next accumulated times when the variation meets the target condition in the next period and the previous accumulated times when the variation meets the target condition in the previous period, and calculating the change rate of the next accumulated times compared with the previous accumulated times; when the rate of change meets furnace condition degradation criteria: respectively calculating the average values (A1, B) of the maximum distribution inclination angle of the chute and the edge distribution amount of a plurality of furnace charges in the next period11,…Bn1 and average value in previous cycle A0, B10,…Bn0, calculating the change amplitude { (A1-A0)/A0 of the maximum distribution inclination angle of the chute and the edge distribution amount of a plurality of charging materials in the next period compared with the previous period, (B)11-B10)/B10,…(Bn1-Bn0)/Bn0, screening out a cloth regulating and controlling parameter with the largest variation amplitude, and regulating the cloth regulating and controlling parameter in the current cloth system to approach the previous cycle to obtain the cloth system for the subsequent cloth stage; and/or the like, and/or,
calculating the variation of the secondary central furnace condition characterization parameters in each material distribution stage, calculating the next accumulated times when the variation meets the target condition in the next period and the previous accumulated times when the variation meets the target condition in the previous period, and calculating the change rate of the next accumulated times compared with the previous accumulated times; when the rate of change meets furnace condition degradation criteria: respectively calculating the average values (A1, C) of the maximum distribution inclination angle of the chute and the central distribution amount of a plurality of furnace charges in the next period11,…Cn1 and average value in previous cycle A0, C10,…Cn0, calculating the maximum distribution inclination angle of the chute, the change amplitude of the central distribution amount of a plurality of charging materials in the next period compared with the previous period { (A1-A0)/A0, (C)11-C10)/C10,…(Cn1-Cn0)/Cn0} and screening out the most varied amplitudeAnd adjusting the cloth adjusting parameter in the current cloth system to approach the previous cycle to obtain the cloth system for the subsequent cloth stage by using the large cloth adjusting parameter.
As a further improvement of one embodiment of the invention, the distribution system is a multi-ring distribution system and has at least four ring positions which are sequentially distributed from the edge of the blast furnace to the center of the blast furnace, the edge distribution quantity is the ratio of the number of chute turns of two ring positions close to the edge of the blast furnace to the total number of chute turns of all ring positions, and the center distribution quantity is the ratio of the number of chute turns of two ring positions close to the center of the blast furnace to the total number of chute turns of all ring positions;
the secondary edge furnace condition characterization parameters are secondary edge temperature average values of the furnace throat cross temperature measuring device in four directions, and the secondary central furnace condition characterization parameters are secondary central temperature average values of the furnace throat cross temperature measuring device in four directions.
As a further improvement of an embodiment of the present invention, the target condition is that an absolute value is within a target range interval;
the furnace condition degradation criterion is greater than 0.5.
In order to achieve one of the above objects, an embodiment of the present invention further provides a system for regulating and controlling a burden distribution system of a blast furnace, comprising,
the data acquisition module is used for acquiring the cloth data of a single cloth stage, and comprises the following components: collecting action signals of a material distribution device, and determining the starting time and the ending time of a material distribution stage; collecting material distribution regulation and control parameters in a material distribution system adopted in the material distribution stage; collecting furnace condition characterization parameters at the starting time and the ending time of a material distribution stage;
the data storage module is connected with the data acquisition module and used for receiving and storing the cloth data of each cloth stage from the data acquisition module so as to establish a long-term database;
the regulation and control instruction generation module is connected with the data storage module and used for generating a material distribution system regulation and control instruction and extracting material distribution data of each material distribution stage in two periods backtracking from the instruction designated moment from the long-term database;
the data processing module is connected with the regulation and control instruction generating module and is used for: calculating the variation of the extracted furnace condition characterization parameters in each material distribution stage, calculating the next accumulated times when the variation meets the target condition in the next period and the previous accumulated times when the variation meets the target condition in the previous period, and calculating the change rate of the next accumulated times compared with the previous accumulated times; and further for, when the rate of change meets furnace condition degradation criteria: calculating the variation amplitude of each cloth regulation parameter in the next period compared with the variation amplitude in the previous period;
the regulation and control module is connected with the data processing module and is used for: and according to the variation amplitude obtained by the calculation of the data processing module, screening a maximum cloth control parameter from all the cloth control parameters, and adjusting the cloth control parameter in the current cloth system close to the previous cycle to obtain the cloth system for the subsequent cloth stage.
As a further improvement of an embodiment of the present invention, the data acquisition module is configured to:
when an opening action signal of a material flow valve of the charging bucket is acquired, determining the starting moment of a material distribution stage, and when a closing action signal of the material flow valve of the charging bucket is acquired, determining the ending moment of the material distribution stage; alternatively, the first and second electrodes may be,
when a lifting movement signal of the mechanical stock rod is acquired, determining the starting time of a material distribution stage, and when a releasing movement signal of the mechanical stock rod is acquired, determining the finishing time of the material distribution stage; alternatively, the first and second electrodes may be,
after collecting the lifting movement signal of the mechanical measuring rod, when collecting the opening movement signal of the material flow valve of the charging bucket in a certain time interval, determining the starting moment of the material distribution stage, and after collecting the closing movement signal of the material flow valve of the charging bucket, when collecting the lowering movement signal of the mechanical measuring rod in a certain time interval, determining the ending moment of the material distribution stage.
As a further improvement of the embodiment of the present invention, the regulation instruction generating module is further configured to: and regularly generating a material distribution system regulation and control instruction, taking the generation time of the material distribution system regulation and control instruction as an instruction designated time, and extracting material distribution data of each material distribution stage in two periods backtracking from the instruction designated time from the long-term database.
As a further improvement of an embodiment of the present invention, the distribution control parameter includes a maximum distribution inclination angle of the chute, and further includes an edge distribution amount of a plurality of furnace materials and/or a central distribution amount of a plurality of furnace materials;
the furnace condition characterization parameters comprise secondary edge furnace condition characterization parameters and/or secondary center furnace condition characterization parameters;
the data processing module is further configured to: calculating the variation of the secondary edge furnace condition characterization parameters in each material distribution stage, calculating the next accumulated times when the variation meets the target condition in the next period and the previous accumulated times when the variation meets the target condition in the previous period, and calculating the change rate of the next accumulated times compared with the previous accumulated times; when the change rate meets the furnace condition degradation standard, respectively calculating the change amplitude of the maximum distribution inclination angle of the chute and the edge distribution amount of a plurality of furnace materials in the next period compared with the previous period; the regulatory module is further configured to: according to the variation amplitude obtained by the calculation of the data processing module, a material distribution regulation and control parameter with the largest variation amplitude is screened from the maximum material distribution inclination angle of the chute and the edge material distribution amount of a plurality of furnace materials, and the material distribution regulation and control parameter in the current material distribution system is adjusted towards the previous cycle to obtain the material distribution system for the subsequent material distribution stage; and/or the like, and/or,
the data processing module is further configured to: calculating the variation of the secondary central furnace condition characterization parameters in each distribution stage, calculating the next accumulated time when the variation meets the target condition in the next period, the previous accumulated time when the variation meets the target condition in the previous period, calculating the change rate of the next accumulated time compared with the previous accumulated time, and when the change rate meets the furnace condition degradation standard, respectively calculating the maximum distribution inclination angle of the chute and the change amplitude of the central distribution amount of a plurality of furnace charges compared with the previous period in the next period; the regulatory module is further configured to: and according to the variation amplitude obtained by the calculation of the data processing module, screening a distribution regulation and control parameter with the largest variation amplitude from the maximum distribution inclination angle of the chute and the central distribution amount of a plurality of furnace charges, and adjusting the distribution regulation and control parameter in the current distribution system close to the previous cycle to obtain the distribution system for the subsequent distribution stage.
As a further improvement of one embodiment of the invention, the distribution system is a multi-ring distribution system and has at least four ring positions which are sequentially distributed from the edge of the blast furnace to the center of the blast furnace, the edge distribution quantity is the ratio of the number of chute turns of two ring positions close to the edge of the blast furnace to the total number of chute turns of all ring positions, and the center distribution quantity is the ratio of the number of chute turns of two ring positions close to the center of the blast furnace to the total number of chute turns of all ring positions;
the secondary edge furnace condition characterization parameters are secondary edge temperature average values of the furnace throat cross temperature measuring device in four directions, and the secondary central furnace condition characterization parameters are secondary central temperature average values of the furnace throat cross temperature measuring device in four directions.
Compared with the prior art, the invention has the beneficial effects that: firstly, the starting time and the ending time of a material distribution stage are determined by collecting action signals of a material distribution device, and then the material distribution stage can be extracted from the whole blast furnace production, so that the material distribution stage can be accurately evaluated, and furnace condition characterization parameters such as furnace throat temperature, air supply pressure and the like are accurately and effectively associated with the material distribution stage; and moreover, a database is established on the basis of the distribution data of each distribution stage, and the furnace condition characterization parameters and the distribution regulation and control parameters change rate of the previous and subsequent periods are analyzed, so that when furnace burden, equipment, a distribution system and other factors change, the change of the furnace condition can be accurately judged, the distribution regulation and control parameters which cause the change can be determined, an adjustment strategy of the distribution system can be accurately given, even the furnace condition deterioration can be found in advance and the distribution system can be optimized before the furnace condition is seriously abnormal, and the method has great significance for the smooth operation of the blast furnace.
Drawings
FIG. 1 is a flowchart of a method for controlling a blast furnace burden distribution system according to an embodiment of the present invention;
FIG. 2 is a structural diagram of a blast furnace to which a method and a system for regulating and controlling a burden distribution system of the blast furnace according to an embodiment of the present invention are adapted;
fig. 3 is a schematic block diagram of a control system for a blast furnace burden distribution system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
Referring to fig. 1, a preferred embodiment of the method for regulating and controlling the burden distribution of a blast furnace according to the present invention will be described below with reference to the blast furnace structure shown in fig. 2.
The method comprises the following steps: and acquiring the material distribution data of a single material distribution stage.
The method specifically comprises the following substeps: collecting action signals of the material distribution device, and determining the starting time and the ending time of the material distribution stage.
Based on the substep, the material distribution stage is extracted from the whole production of the blast furnace by determining the starting time and the ending time of the material distribution stage so as to eliminate the interference caused by various factors in the material distribution stage, thereby facilitating the direct association of the furnace condition characterization parameters with the material distribution stage and embodying the influence of a material distribution system.
With reference to fig. 2, the material distribution device is a device associated with material distribution, and may specifically include any one or more of the feeding device 1, the charging bucket 2, the charging bucket 3, the chute 6, the mechanical probe 8, and the like.
In a preferred embodiment, the starting moment of the material distribution stage is determined when an opening action signal that the material flow valve 4 of the material tank 2 (or the material flow valve 5 of the material tank 3) is switched from closed to open is acquired within a certain time interval (preferably within 30 seconds) after the lifting action signal of the mechanical measuring rod 8 is acquired. In this case, the occurrence time of the opening operation signal of the flow valve 4 of the bucket 2 (or the flow valve 5 of the bucket 3) is determined as the starting time of the distribution stage. On the contrary, when the scaling-off signal of the mechanical measuring rod 8 is acquired within a certain time interval (preferably within 30 seconds) after the closing signal that the material flow valve 4 of the material tank 2 (or the material flow valve 5 of the material tank 3) is switched from open to closed is acquired, the end time of the material distribution stage is determined. In this case, the occurrence time of the tape-out operation signal of the mechanical tape 8 is determined as the end time of the material distribution stage.
In a variation, the starting time and the ending time of the material distribution stage may also be determined by an action signal of a single material distribution device, for example, in a variation, when a tape-up action signal of the mechanical tape 8 is acquired, the starting time of the material distribution stage is determined, and correspondingly, when a tape-out action signal of the mechanical tape 8 is acquired, the ending time of the material distribution stage is determined; for another example, in another variation, when an opening action signal of the material flow valve 4 of the material tank 2 (or the material flow valve 5 of the material tank 3) is collected, the starting time of the material distribution stage is determined, and when a closing action signal of the material flow valve 4 of the material tank 2 (or the material flow valve 5 of the material tank 3) is collected, the ending time of the material distribution stage is determined.
In addition, in a preferred embodiment, in the sub-step, current charge information may be acquired based on the action signal of the distributing device. The charging information preferably comprises charging materials such as coke and ore, including batches such as coke batch number and ore batch number. After the length lifting action signal of the mechanical measuring rod 8 is acquired, when the opening action signal of the material flow valve 4 of the material tank 2 (or the material flow valve 5 of the material tank 3) is acquired within a certain time interval (preferably within 30 seconds), the current batch of the feeding device 1 corresponding to the opening action signal of the material tank 2 (or the material tank 3) is acquired according to the corresponding relation of time, and the charging material entering and the distributing stage of the batch are determined. Wherein, the burden corresponding to each charging bucket can be preset by the programmable logic controller 10.
In the preferred embodiment, the cartesian product of the charge information and the burden distribution device can be pre-established to correlate the action signal of the burden distribution device with the charge information. For example, a cartesian product of the burden, the batch and the burden valve of the burden tank is pre-established, so that the action signal of the burden valve of the burden tank is associated with the burden and the batch, in the cartesian product, the burden has elements such as coke, ore and 0, the batch has elements such as a plurality of batch number values and 0, the burden valve of the burden tank has elements such as opening and closing, when the burden valve is switched from a closing element to an opening element, the burden is not empty and is not 0, and the burden is not empty and is not 0, the distribution stage of entering the current element (such as ore) of the burden and the current element of the batch is confirmed; and when the opening element of the material flow valve of the charging bucket is the closing element, the charging material is 0, and the batch is 0, the material distribution stage is determined to be finished. Similarly, it is also possible to establish the cartesian product of the charge, the batch, the mechanical probe 8, so as to associate the action signal of the mechanical probe 8 with the charge, the batch.
The step further comprises the sub-steps of: collecting the material distribution regulation and control parameters in the material distribution system adopted in the material distribution stage.
As mentioned in the background art, each material distribution stage of the blast furnace is performed according to a preset material distribution system. According to the material distribution system, material distribution regulation and control parameters of each material distribution stage can be obtained, and the material distribution regulation and control parameters can be directly obtained from the material distribution regulation and control parameters of the material distribution system or can be obtained by derivation from the material distribution regulation and control parameters of the material distribution system.
In a preferred embodiment, the distribution control parameter includes a maximum distribution inclination angle of the chute, the distribution inclination angle of the chute is an included angle between a groove surface of the chute 6 and a center line of the blast furnace when the chute 6 rotates around the center line of the blast furnace for distribution, and correspondingly, the maximum distribution inclination angle of the chute is an angle with a maximum included angle when the chute 6 rotates around the center line of the blast furnace for distribution.
In addition, in a preferred embodiment, the material distribution control parameters include position material distribution control parameters corresponding to the material distribution position in the radial direction of the blast furnace, such as an edge material distribution amount corresponding to the position at or near the edge in the radial direction of the blast furnace and a center material distribution amount corresponding to the position at or near the center in the radial direction of the blast furnace. The edge distribution amount is provided for a plurality of furnace charges, for example, if the furnace charges have two types of ores and cokes, the edge distribution amount of the ores and the coke are provided correspondingly; similarly, there are several central distribution amounts corresponding to several charging materials, for example, if the charging materials have two types of ore and coke, there are corresponding ore central distribution amount and coke central distribution amount. Of course, in a variation, the burden distribution control parameter may include one of an edge burden distribution amount of a plurality of burden materials and a center burden distribution amount of a plurality of burden materials.
Further, in a preferred embodiment, the material distribution system is a multi-ring material distribution system, that is, each material distribution stage adopts a multi-ring material distribution system for material distribution. The multi-ring material distribution system comprises at least four ring positions and the number of chute turns of each ring position, wherein the four ring positions are sequentially distributed from the edge of the blast furnace to the center of the blast furnace. Wherein, the ring position is determined by the material distribution inclination angle of the chute, namely different chute material distribution inclination angles, different ring positions are determined, and the material distribution inclination angle of the chute corresponding to the ring position of the edge of the blast furnace is larger than the material distribution inclination angle of the chute corresponding to the ring position of the center of the blast furnace; the chute 6 rotates 360 degrees around the center line of the blast furnace for one circle, namely the number of the chute circles at the ring position, namely the number of the chute circles 6 rotating at the distribution inclination angle corresponding to the ring position. Of course, in a variation, the material distribution system may be any one of spiral material, fixed point material, and fan-shaped material.
In a preferred embodiment, corresponding to the multi-ring distribution system, the chute maximum distribution inclination angle is larger than the chute distribution inclination angle corresponding to other ring positions, namely, the chute distribution inclination angle corresponding to one ring position close to the edge of the blast furnace. It follows that the maximum distribution inclination of the chute can be derived directly from the multiple ring distribution regime as described above.
Corresponding to the multi-ring distribution system, the edge distribution amount is the ratio of the number of chute turns of two ring positions close to the edge of the blast furnace to the total number of chute turns of all ring positions, and the center distribution amount is the ratio of the number of chute turns of two ring positions close to the center of the blast furnace to the total number of chute turns of all ring positions, for example, in the distribution system of a distribution stage, 5 ring positions and 20 rings are provided, while the number of chute turns of two ring positions close to the edge of the blast furnace is 4 rings and 4 rings respectively, so that the edge distribution amount is 4 rings 2/20 rings which is 0.4; the number of the chute turns of the two ring positions close to the center of the blast furnace is 3 and 3 respectively, and the central material distribution amount is 3 turns and 2/20 turns which is 0.3. Of course, in the distribution stage of different furnace materials, the corresponding distribution system has distribution adjustment parameters corresponding to the number of ring positions and the number of turns of the chute of different furnace materials, so as to obtain the edge distribution amount corresponding to different furnace materials and the central distribution amount corresponding to different furnace materials. Therefore, the edge material distribution amount and the center material distribution amount are obtained by deriving the material distribution regulation and control parameters such as the ring position, the chute turn number and the like in the material distribution system as described above.
The step further comprises the sub-steps of: and collecting furnace condition characterization parameters of the starting time and the ending time of the material distribution stage.
In the production of the blast furnace, a plurality of furnace condition characterization parameters are causally associated with the material distribution, namely, each furnace condition characterization parameter can show different change rules in theory due to different material distribution conditions along with the progress of a material distribution stage. In the present application, the furnace condition characterizing parameters at the starting time of the distributing phase and the furnace condition characterizing parameters at the ending time of the distributing phase are collected, so as to facilitate the direct association of the furnace condition characterizing parameters with the distributing phase.
In a preferred embodiment, the furnace condition characterizing parameters comprise position furnace condition characterizing parameters corresponding to the position of the blast furnace radial burden, such as secondary edge furnace condition characterizing parameters corresponding to the position of the blast furnace radial edge or near edge and secondary center furnace condition characterizing parameters corresponding to the position of the blast furnace radial center or near center. The secondary edge furnace condition characterization parameter can be approximately causally related to the material distribution condition at the edge or near the edge of the blast furnace, and can reflect the material distribution condition at the edge or near the edge of the blast furnace to a certain extent, and accordingly, as described later, the secondary edge furnace condition characterization parameter can be used for adjusting the maximum material distribution inclination angle and the edge material distribution amount of the chute in a material distribution system; similarly, the sub-center furnace condition characterizing parameter, which may be substantially causally related to the distribution at or near the center of the blast furnace, can reflect the distribution at or near the center of the blast furnace to some extent, and accordingly, as described later, can be used for adjusting the chute maximum distribution inclination angle, the center distribution amount in the distribution regime. In summary, in a preferred embodiment, by collecting the position furnace condition characterizing parameters (such as the secondary central furnace condition characterizing parameter, the secondary edge furnace condition characterizing parameter, and the like) at the starting time and the ending time of the distributing stage, the position distributing control parameters (such as the edge distributing amount corresponding to the secondary edge furnace condition characterizing parameter, the central distributing amount corresponding to the secondary central furnace condition characterizing parameter, and the like) corresponding to the position furnace condition characterizing parameter in the distributing system can be precisely adjusted in a targeted manner.
In a variant, the furnace condition characterizing parameter may be one of a secondary edge furnace condition characterizing parameter and a secondary center furnace condition characterizing parameter.
Further, in a preferred embodiment, the secondary edge furnace condition characterizing parameter is a secondary edge temperature average value of the furnace throat cross temperature measuring device in four directions, and the secondary center furnace condition characterizing parameter is a secondary center temperature average value of the furnace throat cross temperature measuring device in four directions, so that the furnace condition of the material distribution stage can be more accurately judged by adopting the blast furnace throat temperature which is very sensitive to the material distribution condition and obviously changes as the furnace condition characterizing parameter of the regulating and controlling method, and the adjustment of the material distribution system can be more accurately realized. In a variation, the furnace condition characterizing parameter can be set to any one of blast air pressure, cooling wall temperature, etc. or any combination of blast furnace throat temperature, blast air pressure, cooling wall temperature, etc.
As can be seen from the above description of this sub-step, in a preferred embodiment, the secondary edge temperature average T1, the secondary center temperature average T2 at the beginning of the distribution phase, and the secondary edge temperature average T1 ', the secondary center temperature average T2' at the end of the distribution phase are collected.
It should be noted that, unless necessary, each sub-step in the step is not limited by a specific order, and the implementation order of each sub-step is not limited by the sequential description of the sub-steps in the present application.
The method comprises the following steps: and establishing a long-term database.
The continuous production of the blast furnace has a plurality of material distribution stages, and a long-term database is established based on the material distribution data of each material distribution stage obtained in the previous step. It will be appreciated that the long-term database has distribution data for a plurality of distribution stages.
In a preferred embodiment, the long-term database is established continuously with the continuous production of the blast furnace, that is, every time a material distribution stage is performed, material distribution data of the material distribution stage is correspondingly added into the long-term database.
The method comprises the following steps: and generating a material distribution system regulation and control instruction, and extracting material distribution data of each material distribution stage in two periods backtracking from the instruction designated moment from the long-term database.
The cloth system regulating and controlling instruction comprises an instruction appointed time and can also comprise a cycle time span, so that when the cloth system regulating and controlling instruction is generated, cloth data of each cloth stage backtracking from the instruction appointed time in two cycles are extracted from the long-term database according to the cloth system regulating and controlling instruction, the extracted cloth data of the cloth stages are put into the subsequent steps, and the cloth data are used as a data support for cloth system regulating and controlling. For example, in the cloth system regulation instruction, with one month as a cycle time span, cloth data of each cloth stage during backtracking from the instruction-specified time to two months is extracted from the long-term database, where the instruction-specified time backtracks for one month as a next cycle, and backtracks for one month (i.e., the previous month) forward as a previous cycle.
In the preferred embodiment, a material distribution system regulation and control instruction is automatically generated at regular intervals, and material distribution data of each material distribution stage in two periods traced back from the instruction designated time is extracted from the long-term database by taking the generation time of the material distribution system regulation and control instruction as the instruction designated time. For example, a material distribution system regulation and control instruction can be automatically generated at 0 point every day, and 0 point of the day is used as an instruction to specify time; for another example, the distribution system regulation and control instruction may be automatically generated each time the end time of the current distribution stage is obtained, and the end time of the current distribution stage is used as the instruction designated time. Therefore, the method realizes regular or even near real-time monitoring of the burden distribution furnace conditions in nearly two periods, so as to regulate and control the burden distribution system in time according to changes of the burden distribution furnace conditions, ensure smooth operation of the blast furnace and prevent serious abnormity.
In addition, in the preferred embodiment, the material distribution system regulation and control instruction may also be generated according to the information input by the operator, and accordingly, the instruction specified time and the cycle time span may be determined according to the information input by the operator, so that the operator can perform material distribution system regulation and control in a targeted manner. For example, the operator may designate a certain historical time as the instruction designation time to inquire about the distribution of the blast furnace in a period before the historical time.
Further preferably, the burden distribution regulation and control instruction may further include a specified burden, and according to the burden distribution regulation and control instruction, burden distribution data of each burden distribution stage of the specified burden in two cycles traced back from the specified time of the instruction is extracted from the long-term database, so that the extracted burden distribution data of the burden distribution stages are put into the subsequent steps. For example, in the material distribution system regulation instruction, if the specified furnace burden is ore, material distribution data of each material distribution stage of the ore in two cycles traced back from the specified time of the instruction are extracted from the long-term database.
The method comprises the following steps: and processing the extracted data.
The method specifically comprises the following substeps: and calculating the variation of the extracted furnace condition characterization parameters in each material distribution stage.
In the sub-step, the variation of the furnace condition characterizing parameter in each distributing stage, i.e. the difference between the ending time of the distributing stage and the starting time of the distributing stage of the furnace condition characterizing parameter.
In a preferred embodiment, the variation of the secondary edge furnace condition characterizing parameter in each distribution stage is calculated, for example preferably the variation △ T1 of the secondary edge temperature average in each distribution stage is T1 '-T1, and the variation of the secondary central furnace condition characterizing parameter in each distribution stage is calculated, for example preferably the variation △ T2 of the secondary central temperature average in each distribution stage is T2' -T2.
The step further comprises the sub-steps of: and calculating the next accumulated times when the variation meets the target condition in the next period and the previous accumulated times when the variation meets the target condition in the previous period.
In the substep, aiming at the previous period, whether the variation of the furnace condition characterization parameter in each material distribution stage meets the target condition needs to be judged, if so, 1 time is counted in the previous accumulated times, and thus, the previous accumulated times are obtained through accumulation of the judgment result of each material distribution stage in the previous period; similarly, for the next period, it is necessary to determine whether the variation of the furnace condition characterizing parameter in each distribution stage meets the target condition, and if so, count 1 time in the next accumulated number of times, so as to obtain the next accumulated number of times through accumulation of the determination result of each distribution stage in the next period.
In a preferred embodiment, the number of previous accumulations that the variation of the secondary edge furnace condition characterizing parameter satisfies the target condition is calculated, and the number of next accumulations that the variation of the secondary edge furnace condition characterizing parameter satisfies the target condition is calculated. Further, the number of previous accumulations that the variation of the sub-center furnace condition characterizing parameter satisfies the target condition is calculated, and the number of next accumulations that the variation of the sub-center furnace condition characterizing parameter satisfies the target condition is calculated.
Wherein, for two different furnace condition characterization parameters, the corresponding target conditions are set to be different. For example, the target conditions for the sub-edge furnace condition characterizing parameter and the sub-center furnace condition characterizing parameter are different.
In addition, for the furnace throat temperature in the preferred embodiment as the furnace condition characterizing parameter, the target condition is that the absolute value is within the target range interval.
In the preferred embodiment, the variation | Δ T1| ∈ (T0, + ∞) of the average value of the secondary edge temperatures in each distribution stage is determined for the previous cycle, and based on the determination results of each distribution stage in the previous cycle,obtaining the previous accumulated times D10Similarly, for the next period, the variation | Δ T1| ∈ (T0, infinity) of the average value of the temperature of the secondary edge in each distribution stage is determined, and then the next accumulated number D1 is obtained based on the determination result of each distribution stage in the next period1. Wherein, when the designated charging material is ore, T0 can be set to 2 ℃, and in each distribution stage of the ore, if the variation | Delta T1| of the average value of the temperature of the secondary edge exceeds 2 ℃, the furnace edge or the edge close to the furnace edge is easy to collapse or even collapse already occurs in the distribution stage. In the sub-step, the previous accumulated times D1 that the variation | Delta T1| of the secondary edge temperature average value exceeds T00And the latter cumulative number of times D11The calculation can be conveniently carried out to determine the material distribution condition development rule of the edge or the near edge of the blast furnace in the previous period and the next period in combination with the subsequent steps.
Further, in a preferred embodiment, the variation | Δ T2| ∈ (T0', + ∞) of the mean value of the sub-center temperatures in each distribution stage is judged for the previous cycle, and then the previous cumulative number of times D2 is obtained based on the judgment result of each distribution stage in the previous cycle0Similarly, for the next period, the variation | Δ T2| ∈ (T0', + ∞) of the mean value of the secondary center temperature in each distribution stage is judged first, and then the next accumulated number D2 is obtained based on the judgment result of each distribution stage in the next period1. Wherein, when the designated charging material is ore, T0' can be set to 50 ℃, and in each distribution stage of the ore, if the variation | Delta T2| of the average value of the sub-center temperature exceeds 50 ℃, the center or the position close to the center of the blast furnace in the distribution stage is easy to collapse and even already collapses. In the sub-step, the previous accumulated times D2 that the variation | Delta T2| of the sub-center temperature average value exceeds T00And the latter cumulative number of times D21The calculation can be conveniently carried out to determine the material distribution condition development rule of the center or the position close to the center of the blast furnace in the previous period and the later period by combining the subsequent steps.
The step further comprises the sub-steps of: calculating the change rate of the next accumulated number compared with the previous accumulated number.
Excellence inIn an embodiment, for the sub-edge furnace condition characterization parameter, a change rate of the corresponding next accumulated number compared with the previous accumulated number is calculated. For example, preferably, the previous accumulated number of times D1 based on the previous sub-step is obtained for the secondary edge temperature average0And the latter cumulative number of times D11The calculated change rate V1 ═ D1 (D1)1-D10)/D10。
Similarly, in the preferred embodiment, for the sub-center furnace condition characterizing parameter, the rate of change of the corresponding next accumulated number compared to the previous accumulated number is also calculated. For example, preferably, the sub-center temperature average value is based on the previous accumulated number of times D1 obtained in the previous sub-step0And the latter cumulative number of times D11The calculated change rate V2 ═ D2 (D2)1-D20)/D20。
The method comprises the following steps: and when the change rate meets the furnace condition degradation standard, adjusting a material distribution system.
In this step, the furnace condition deterioration standard is preset to be used as a basis for judging the change of the furnace condition of the material distribution in the next period compared with the previous period, and further, whether to adjust the material distribution system is determined.
In a preferred embodiment, the furnace condition degradation criterion is greater than a furnace condition degradation threshold, and the rate of change satisfies the furnace condition degradation criterion, i.e. the rate of change is greater than the furnace condition degradation threshold.
Specifically, the furnace condition deterioration threshold value may be set to an arbitrary value equal to or greater than 0 as needed. In the present embodiment, it is preferable that the value is set to be greater than 0.3, and more specifically, may be 0.5, so that by setting the value to be greater than 0.3, when the change rate of the latter cumulative number of times compared to the former cumulative number of times is between 0 and the value, the burden distribution furnace conditions in the two preceding and succeeding cycles are considered to be substantially stable without adjusting the burden distribution system, thereby reducing the risk of abnormal furnace conditions caused by frequent and excessive adjustments of the burden distribution system. When the change rate of the latter accumulated number of times exceeds the value compared with the former accumulated number of times, the number of times of furnace condition abnormity occurring in the material distribution stage in the latter period is far greater than the number of times of furnace condition abnormity occurring in the material distribution stage in the former period, and at this time, adjustment of the material distribution system is required.
For example, when the change rate V1 > 0.5 for the secondary edge temperature average, i.e., the last cumulative number D1 of changes | Δ T1| ∈ (T0, + ∞) in the secondary edge temperature average1The previous accumulated number of times D1 of change | Δ T1| ∈ (T0, + ∞) from the secondary edge temperature average0In other words, the addition is increased by more than 50%, so that it can be determined that the number of times of furnace condition abnormality occurring in the material distribution stage at the edge or near the edge of the blast furnace in the next period is far greater than the number of times of furnace condition abnormality occurring in the material distribution stage at the edge or near the edge of the blast furnace in the previous period, and at this time, adjustment of a material distribution system is required.
Similarly, for the sub-center furnace condition characterization parameter, the last accumulated number D2 of the variation V1 is greater than or equal to 0.5, i.e., the variation | Δ T2| ∈ (T0', + ∞) of the sub-center temperature average1The previous cumulative number of times D2 of the change | Δ T2| ∈ (T0', + ∞) from the mean value of the sub-center temperatures0In other words, the addition of the amount of the additive is more than 50%, so that the number of times of furnace condition abnormality occurring in the material distribution stage at the center or near the center of the blast furnace in the next period is far greater than the number of times of furnace condition abnormality occurring in the material distribution stage at the center or near the center of the blast furnace in the previous period, and at this time, adjustment of a material distribution system is required.
Under the condition of meeting the above conditions, the following substeps of the step are carried out to realize the adjustment and optimization of the burden distribution system, improve the burden distribution furnace condition, avoid the serious abnormity of the furnace condition caused by burden distribution and ensure the smooth operation of the blast furnace.
Specifically, this step further comprises the substeps of: and calculating the variation amplitude of each cloth regulation parameter in the next period compared with the previous period, screening out the cloth regulation parameter with the largest variation amplitude, and adjusting the cloth regulation parameter in the current cloth system to approach the previous period to obtain the cloth system for the subsequent cloth stage.
The variation amplitude of each cloth control parameter in the next period compared with the previous period is a variation rate of the average value of the cloth control parameter in the next period compared with the average value of the cloth control parameter in the previous period.
In a preferred embodiment, in the substep, "calculating a variation width of each of the cloth control parameters in a subsequent period compared to a previous period" may specifically be: and respectively calculating the average value of each cloth control parameter in the next period and the average value of each cloth control parameter in the previous period, and calculating the variation amplitude of each cloth control parameter in the next period compared with the variation amplitude in the previous period according to the average value of the next period and the average value of the previous period.
Further, in a preferred embodiment, when the rate of change calculated based on the secondary edge furnace condition characterizing parameter reaches a furnace condition degradation threshold: respectively calculating the average values (A1, B) of the maximum distribution inclination angle of the chute and the edge distribution amount of a plurality of furnace charges in the next period11,…Bn1, and respectively calculating the average value of the maximum distribution inclination angle of the chute and the edge distribution amount of a plurality of charging materials in the previous period { A0, B }10,…Bn0 }; calculating the variation amplitude { (A1-A0)/A0 of the maximum distribution inclination angle of the chute and the edge distribution amount of a plurality of furnace materials in the next period compared with the previous period, (B)11-B10)/B10,…(Bn1-Bn0)/Bn0 }; and then screening a material distribution regulation and control parameter with the largest variation range from the maximum material distribution inclination angle of the chute and the edge material distribution amount of a plurality of furnace charges, and regulating the material distribution regulation and control parameter in the current material distribution system close to the previous period to obtain the material distribution system for the subsequent material distribution stage.
For example, when the rate of change V1 calculated based on the secondary edge temperature average is 0.5 or more: calculating the average value A1 of the maximum distribution inclination angle of the chute in the next period and the average value B of the ore edge distribution amount in the next period11. Average value B of coke edge distribution amount in the next period21. Average value A0 of chute maximum distribution inclination angle in previous period and average value B of ore edge distribution amount in previous period10. Average coke edge charge level over previous cycle B20; then calculating the variation amplitude (A1-A0)/A0 of the maximum distribution inclination angle of the chute in the next period compared with the previous period and the variation amplitude (B) of the ore edge distribution amount in the next period compared with the previous period11-B10)/B10. The variation of the coke edge charge in the subsequent cycle compared to the previous cycle (B)21-B20)/B20; then comparing to obtain (A1-A0)/A0 and (B)21-B20)/B20、(B11-B10)/B1And (3) sequentially reducing 0, screening out the maximum distribution inclination angle of the chute, adjusting the maximum distribution inclination angle of the chute in the current distribution system to approach A0 in the previous period, and using the updated distribution system in the subsequent distribution stage of the blast furnace.
Similarly, in a preferred embodiment, when the rate of change calculated based on the sub-central furnace condition characterizing parameter reaches a furnace condition degradation threshold: respectively calculating the average values (A1, C) of the maximum distribution inclination angle of the chute and the central distribution amount of a plurality of furnace charges in the next period11,…Cn1, and respectively calculating the average value of the maximum distribution inclination angle of the chute and the central distribution amount of a plurality of charging materials in the previous period { A0, C }10,…Cn0 }; then calculating the variation amplitude { (A1-A0)/A0 of the maximum distribution inclination angle of the chute and the central distribution amount of a plurality of furnace charges in the next period compared with the previous period, (C)11-C10)/C10,…(Cn1-Cn0)/Cn0 }; and then screening out a cloth regulation and control parameter with the largest variation amplitude, and regulating the cloth regulation and control parameter in the current cloth system to approach the previous cycle to obtain the cloth system for the subsequent cloth stage.
For example, when the rate of change V2 calculated based on the sub-center temperature average is 0.5 or more: calculating the average value A1 of the maximum distribution inclination angle of the chute in the next period and the average value C of the distribution amount of the ore center in the next period11. Average value C of coke center charge in the next period21. Average value A0 of chute maximum distribution inclination angle in the previous period and average value C of ore center distribution amount in the previous period10. Average value C of coke center charge in previous period20; then calculating the variation amplitude (A1-A0)/A0 of the maximum distribution inclination angle of the chute in the next period compared with the previous period and the variation amplitude (C) of the distribution amount of the ore center in the next period compared with the previous period11-C10)/C10. The variation of the coke center charge in the following cycle compared to the preceding cycle (C)21-C20)/C20; then comparing to obtain (C)11-C10)/C10、(A1-A0)/A0、(C21-C20)/C20 are reduced in sequence, the ore central distribution amount is screened out, and the ore central distribution amount in the current distribution system approaches to C in the previous period10, and further using the updated material distribution system for the subsequent material distribution stage of the blast furnace.
The method comprises the following steps: and when the change rate does not meet the furnace condition degradation standard, maintaining the current material distribution system.
In the present preferred embodiment, when the change rate does not satisfy the furnace condition degradation criterion, that is, the change rate does not reach the furnace condition degradation threshold, the current material distribution regime may be maintained.
To sum up, the method for adjusting the blast furnace burden distribution system of the preferred embodiment has the following beneficial effects:
(1) the method comprises the steps that the starting time and the ending time of a material distribution stage are determined by collecting action signals of a material distribution device, and then the material distribution stage can be extracted from the whole blast furnace production, so that the material distribution stage can be accurately evaluated, and furnace condition characterization parameters such as furnace throat temperature, air supply pressure and the like are accurately and effectively associated with the material distribution stage;
(2) the method comprises the steps of establishing a database by taking the material distribution data of each material distribution stage as a basis, analyzing the furnace condition characterization parameters and the material distribution regulation and control parameters change rate of the next period and the previous period, accurately judging the change rate of the furnace condition, determining the material distribution regulation and control parameters which cause changes when the furnace condition is deteriorated, accurately giving an adjustment strategy of a material distribution system, even finding the furnace condition deterioration in advance before the furnace condition is seriously abnormal and optimizing the material distribution system, and has great significance for the smooth operation of a blast furnace;
(3) the method can evaluate, match and analyze furnace conditions and material distribution systems of radial material distribution positions of the blast furnace such as a secondary edge, a secondary center and the like, and realize accurate adjustment of the material distribution system to material distribution regulation and control parameters corresponding to radial specific positions of the blast furnace, so that the adjustment of the material distribution system is more refined.
Further, referring to fig. 3, which is a preferred embodiment of a regulation and control system of a blast furnace burden distribution system according to the present invention, the regulation and control system may be used to implement the regulation and control method described above, the regulation and control system includes a data acquisition module 100, a data storage module 200, a regulation and control instruction generation module 300, a data processing module 400, and a regulation and control module 500, and each module of the regulation and control system is described below with reference to the blast furnace structure shown in fig. 2.
The data acquisition module 100 is used for acquiring cloth data of a single cloth stage.
Specifically, the data acquisition module 100 is configured to acquire an action signal of the material distribution device, and determine a start time and an end time of a material distribution stage. Therefore, the material distribution stage is extracted from the whole production of the blast furnace by determining the starting time and the ending time of the material distribution stage so as to eliminate the interference caused by various factors in the material distribution stage, thereby facilitating the direct association of the furnace condition characterization parameters with the material distribution stage and embodying the influence of a material distribution system.
In detail, a data input end of the data acquisition module 100 may be connected to an electronic control unit of a material distribution device of a blast furnace, so as to acquire an action signal of the material distribution device from the electronic control unit, and in combination with the schematic structural diagram of the blast furnace shown in fig. 2, the material distribution device is a device associated with material distribution, and specifically may include any one or more of the material feeding device 1, the material tank 2, the material tank 3, the chute 6, the mechanical probe 8, and the like, and the electronic control units of these devices may be integrated in a top programmable logic controller 10 of the blast furnace as shown in the drawing, and the programmable logic controller 10 is connected to the data input end of the data acquisition module 100, so that the data acquisition module 100 may acquire corresponding data of each device.
In a preferred embodiment, the data acquisition module 100 is configured to: after the mechanical measuring rod 8 collects the lifting rod action signal, the material flow valve 4 of the material tank 2 (or the material flow valve 5 of the material tank 3) is collected to be switched from closed to open within a certain time interval (preferably within 30 seconds), and the starting moment of the material distribution stage is determined. In this case, the occurrence time of the opening operation signal of the flow valve 4 of the bucket 2 (or the flow valve 5 of the bucket 3) is determined as the starting time of the distribution stage.
The data acquisition module 100 is further configured to: and when a scaling-off action signal of the mechanical measuring rod 8 is acquired within a certain time interval (preferably within 30 seconds) after the closing action signal that the material flow valve 4 of the material tank 2 (or the material flow valve 5 of the material tank 3) is switched from open to closed is acquired, determining the end time of the material distribution stage. In this case, the occurrence time of the tape-out operation signal of the mechanical tape 8 is determined as the end time of the material distribution stage.
In alternative embodiments, the data acquisition module 100 may be further adapted to: the starting time and the ending time of the material distribution stage are determined by the action signal of a single material distribution device, for example, in a variant, the data acquisition module 100 is configured to: when a tape lifting action signal of the mechanical stock rod 8 is acquired, determining the starting time of the material distribution stage, and correspondingly, when a tape releasing action signal of the mechanical stock rod 8 is acquired, determining the ending time of the material distribution stage; for another example, in another variation, the data acquisition module 100 is configured to: when an opening action signal of the material flow valve 4 of the material tank 2 (or the material flow valve 5 of the material tank 3) is collected, the starting moment of the material distribution stage is determined, and when a closing action signal of the material flow valve 4 of the material tank 2 (or the material flow valve 5 of the material tank 3) is collected, the ending moment of the material distribution stage is determined.
Additionally, in a preferred embodiment, the data acquisition module 100 is further configured to: and acquiring current furnace charge information based on the action signal of the material distribution device. The charging information preferably comprises charging materials such as coke and ore, including batches such as coke batch number and ore batch number. After the length lifting action signal of the mechanical measuring rod 8 is acquired, when the opening action signal of the material flow valve 4 of the material tank 2 (or the material flow valve 5 of the material tank 3) is acquired within a certain time interval (preferably within 30 seconds), the data acquisition module 100 correspondingly acquires the material charge such as ore corresponding to the material tank 2 (or the material tank 3), acquires the current batch of the feeding device 1 corresponding to the opening action signal of the material tank 2 (or the material tank 3) according to the corresponding relation at any moment, and determines the material distribution stage of entering the material charge and the batch. When a closing action signal that the material flow valve 4 of the material tank 2 (or the material flow valve 5 of the material tank 3) is switched from open to closed is acquired, and a tape-out action signal of the mechanical tape 8 is acquired within a certain time interval (preferably within 30 seconds), the data acquisition module 100 correspondingly acquires the burden material, such as ore, corresponding to the material tank 2 (or the material tank 3), acquires the current batch of the feeding device 1 corresponding to the closing action signal of the material tank 2 (or the material tank 3) according to the time corresponding relationship, and determines that the burden material and the material distribution stage of the batch are ended. Wherein, the burden corresponding to each charging bucket can be preset by the programmable logic controller 10.
In the preferred embodiment, the data acquisition module 100 may further be configured to: and pre-establishing Cartesian products of the burden information and the burden distribution device so as to enable the action signals of the burden distribution device to be related to the burden information. For example, a cartesian product of the burden, the batch, and the bucket flow valve is pre-established, so that the action signal of the bucket flow valve is associated with the burden and the batch, in the cartesian product, the burden has elements such as coke, ore, and 0, the batch has elements such as a plurality of batch numbers and 0, the bucket flow valve has elements such as open and close, when the data acquisition module 100 acquires that the burden valve is switched from a close element to an open element, the burden is not empty and is not 0, and the batch is not empty and is not 0, the data acquisition module 100 confirms that the burden enters a burden distribution stage of a current element (such as ore) and a current element of the batch of the burden; when the data acquisition module 100 acquires that the material flow valve of the charging bucket is closed from the opening element, the furnace burden is 0, the batch is 0, and the data acquisition module 100 confirms that the material distribution stage is finished. For another example, the data acquisition module 100 may also be used to establish a cartesian product of the burden, the batch, and the mechanical probe 8, so as to associate the action signal of the mechanical probe 8 with the burden, the batch.
The data acquisition module 100 is further configured to: collecting the material distribution regulation and control parameters in the material distribution system adopted in the material distribution stage.
As mentioned in the background art, each material distribution stage of the blast furnace is performed according to a preset material distribution system. According to the material distribution system, the data acquisition module 100 can acquire material distribution control parameters of each material distribution stage, and the material distribution control parameters can be directly acquired from the material distribution control parameters of the material distribution system or derived from the material distribution control parameters in the material distribution system.
In a preferred embodiment, the distribution control parameter includes a maximum distribution inclination angle of the chute, the distribution inclination angle of the chute is an included angle between a groove surface of the chute 6 and a center line of the blast furnace when the chute 6 rotates around the center line of the blast furnace for distribution, and correspondingly, the maximum distribution inclination angle of the chute is an angle with a maximum included angle when the chute 6 rotates around the center line of the blast furnace for distribution.
In addition, in a preferred embodiment, the material distribution control parameters include position material distribution control parameters corresponding to the material distribution position in the radial direction of the blast furnace, such as an edge material distribution amount corresponding to the position at or near the edge in the radial direction of the blast furnace and a center material distribution amount corresponding to the position at or near the center in the radial direction of the blast furnace. The edge distribution amount is provided for a plurality of furnace charges, for example, if the furnace charges have two types of ores and cokes, the edge distribution amount of the ores and the coke are provided correspondingly; similarly, there are several central distribution amounts corresponding to several charging materials, for example, if the charging materials have two types of ore and coke, there are corresponding ore central distribution amount and coke central distribution amount. Of course, in a variation, the burden distribution control parameter may include one of an edge burden distribution amount of a plurality of burden materials and a center burden distribution amount of a plurality of burden materials.
Further, in a preferred embodiment, the material distribution system is a multi-ring material distribution system, that is, each material distribution stage adopts a multi-ring material distribution system for material distribution. The multi-ring material distribution system comprises at least four ring positions and the number of chute turns of each ring position, wherein the four ring positions are sequentially distributed from the edge of the blast furnace to the center of the blast furnace. Wherein, the ring position is determined by the material distribution inclination angle of the chute, namely different chute material distribution inclination angles, different ring positions are determined, and the material distribution inclination angle of the chute corresponding to the ring position of the edge of the blast furnace is larger than the material distribution inclination angle of the chute corresponding to the ring position of the center of the blast furnace; the chute 6 rotates 360 degrees around the center line of the blast furnace for one circle, namely the number of the chute circles at the ring position, namely the number of the chute circles 6 rotating at the distribution inclination angle corresponding to the ring position. Of course, in a variation, the material distribution system may be any one of spiral material, fixed point material, and fan-shaped material.
In a preferred embodiment, corresponding to the multi-ring distribution system, the chute maximum distribution inclination angle is larger than the chute distribution inclination angle corresponding to other ring positions, namely, the chute distribution inclination angle corresponding to one ring position close to the edge of the blast furnace. It follows that the maximum distribution inclination of the chute can be derived directly from the multiple ring distribution regime as described above.
Corresponding to the multi-ring distribution system, the edge distribution amount is the ratio of the number of chute turns of two ring positions close to the edge of the blast furnace to the total number of chute turns of all ring positions, and the center distribution amount is the ratio of the number of chute turns of two ring positions close to the center of the blast furnace to the total number of chute turns of all ring positions, for example, in the distribution system of a distribution stage, 5 ring positions and 20 rings are provided, while the number of chute turns of two ring positions close to the edge of the blast furnace is 4 rings and 4 rings respectively, so that the edge distribution amount is 4 rings 2/20 rings which is 0.4; the number of the chute turns of the two ring positions close to the center of the blast furnace is 3 and 3 respectively, and the central material distribution amount is 3 turns and 2/20 turns which is 0.3. Of course, in the distribution stage of different furnace materials, the corresponding distribution system has distribution adjustment parameters corresponding to the number of ring positions and the number of turns of the chute of different furnace materials, so as to obtain the edge distribution amount corresponding to different furnace materials and the central distribution amount corresponding to different furnace materials. Therefore, the edge material distribution amount and the center material distribution amount are obtained by deriving the material distribution regulation and control parameters such as the ring position, the chute turn number and the like in the material distribution system as described above.
The data acquisition module 100 is further configured to: and collecting furnace condition characterization parameters of the starting time and the ending time of the material distribution stage.
In the production of the blast furnace, a plurality of furnace condition characterization parameters are causally associated with the material distribution, namely, each furnace condition characterization parameter can show different change rules in theory due to different material distribution conditions along with the progress of a material distribution stage. In the present application, the data acquisition module 100 acquires the furnace condition characterizing parameters at the beginning of the distribution phase and at the end of the distribution phase, so as to directly associate the furnace condition characterizing parameters with the distribution phase.
In a preferred embodiment, the furnace condition characterizing parameters comprise position furnace condition characterizing parameters corresponding to the position of the blast furnace radial burden, such as secondary edge furnace condition characterizing parameters corresponding to the position of the blast furnace radial edge or near edge and secondary center furnace condition characterizing parameters corresponding to the position of the blast furnace radial center or near center. The secondary edge furnace condition characterization parameter can be approximately causally related to the material distribution condition at the edge or near the edge of the blast furnace, and can reflect the material distribution condition at the edge or near the edge of the blast furnace to a certain extent, and accordingly, as described later, the secondary edge furnace condition characterization parameter can be used for adjusting the maximum material distribution inclination angle and the edge material distribution amount of the chute in a material distribution system; similarly, the sub-center furnace condition characterizing parameter, which may be substantially causally related to the distribution at or near the center of the blast furnace, can reflect the distribution at or near the center of the blast furnace to some extent, and accordingly, as described later, can be used for adjusting the chute maximum distribution inclination angle, the center distribution amount in the distribution regime. In summary, in a preferred embodiment, by collecting the position furnace condition characterizing parameters (such as the secondary central furnace condition characterizing parameter, the secondary edge furnace condition characterizing parameter, and the like) at the starting time and the ending time of the distributing stage, the position distributing control parameters (such as the edge distributing amount corresponding to the secondary edge furnace condition characterizing parameter, the central distributing amount corresponding to the secondary central furnace condition characterizing parameter, and the like) corresponding to the position furnace condition characterizing parameter in the distributing system can be precisely adjusted in a targeted manner.
In a variant, the furnace condition characterizing parameter may be one of a secondary edge furnace condition characterizing parameter and a secondary center furnace condition characterizing parameter.
With reference to the schematic structural diagram of the blast furnace shown in fig. 2, the blast furnace may further include a cross temperature measuring device 7 installed at the throat position of the furnace body of the blast furnace, the cross temperature measuring device 7 has a central temperature measuring couple S0 located at the center line of the blast furnace and four directional temperature sensing lines surrounding the central temperature measuring couple, and each directional temperature sensing line has 7 temperature measuring couples S1 to S7 arranged in sequence from inside to outside in the radial direction. The temperature measuring couple S1 on the radially innermost side of each direction temperature sensing line is also called a secondary center temperature measuring couple, and the secondary center temperature measuring couple is used for collecting the secondary center temperature of the direction temperature sensing line; similarly, the second temperature thermocouple S6 on the radially outer side of each direction temperature sensing line is also called a secondary edge temperature thermocouple, and the secondary edge temperature thermocouple is used for collecting the secondary edge temperature of the direction temperature sensing line. The electronic control unit of the cross temperature measuring device 7 can be integrated into the top programmable logic controller 10 of the blast furnace as shown in the figure. Therefore, the data input end of the data acquisition module 100 acquires the sensing result of the cross temperature measuring device 7 from the programmable logic controller 10.
Further, in a preferred embodiment, the secondary edge furnace condition characterizing parameter is a secondary edge temperature average value of the furnace throat cross temperature measuring device in four directions, and the secondary center furnace condition characterizing parameter is a secondary center temperature average value of the furnace throat cross temperature measuring device in four directions, wherein the secondary edge temperature average value and the secondary center temperature average value are acquired from the programmable logic controller 10 by the data acquisition module 100. Therefore, the furnace condition characterization parameter of the regulation and control method is the blast furnace throat temperature which is very sensitive to the material distribution condition and obviously changes, so that the quality of the furnace condition in the material distribution stage can be more accurately judged, and the adjustment of the material distribution system can be more accurately realized.
In a modified embodiment, the blast furnace may further include sensing devices such as a wind pressure meter 9 and a cooling wall temperature measuring device installed in the blast pipe of the blast furnace, an electronic control unit of these sensing devices may be integrated in the top programmable logic controller 10 as shown in the drawing, and correspondingly, the furnace condition characterizing parameter acquired by the data acquisition module 100 may also be set as any one of the blast wind pressure, the cooling wall temperature, or the like, or as any combination of the blast furnace throat temperature, the blast wind pressure, the cooling wall temperature, or the like.
In a preferred embodiment, the data collecting module 100 is configured to collect the secondary edge temperature average T1, the secondary center temperature average T2 at the beginning of the material distribution stage, and the secondary edge temperature average T1 'and the secondary center temperature average T2' at the end of the material distribution stage.
Preferably, the data input end of the data acquisition module 100 may have a user interaction port, the user interaction port may be any one or combination of a mouse, a keyboard, a touch screen, a mechanical operation element, and the like, so as to allow an operator to enter information, and correspondingly, the data acquisition module 100 is further configured to acquire part of the cloth data at the cloth stage based on the entered information of the operator.
The data input end of the data storage module 200 is connected to the data output end of the data acquisition module 100, and is configured to: for receiving and storing the cloth data of each cloth stage from the data acquisition module 100 to build a long-term database. It is understood that the long-term database has distribution data for a plurality of distribution stages.
In a preferred embodiment, the long-term database is established continuously with the continuous production of the blast furnace, that is, each time a material distribution stage is performed, the data storage module 200 receives material distribution data of the material distribution stage from the data acquisition module 100 and stores the material distribution data in the long-term database.
The regulation and control instruction generating module 300 is connected to the data output end of the data storage module 200, and is configured to generate a distribution system regulation and control instruction, where the distribution system regulation and control instruction includes an instruction specified time and may also include a cycle time span.
The regulation and control instruction generating module 300 is further configured to extract, while or after generating the material distribution regulation and control instruction, material distribution data of each material distribution stage in two periods back-traced from the instruction-specified time from the long-term database of the data storage module 200. The extracted material distribution data at the material distribution stages are conveniently transmitted to the data processing module 400 for data processing, and then the data processing module is used as a data support for material distribution system regulation and control.
For example, in the cloth system regulation instruction, with one month as a cycle time span, cloth data of each cloth stage during backtracking from the instruction-specified time to two months is extracted from the long-term database, where the instruction-specified time backtracks for one month as a next cycle, and backtracks for one month (i.e., the previous month) forward as a previous cycle.
In the preferred embodiment, the control instruction generating module 300 is further configured to: and a material distribution system regulation and control instruction is automatically generated at regular intervals, the generation time of the material distribution system regulation and control instruction is used as an instruction designated time, and material distribution data of each material distribution stage in two periods backtracking from the instruction designated time are extracted from the long-term database. For example, a material distribution system regulation and control instruction can be automatically generated at 0 point every day, and 0 point of the day is used as an instruction to specify time; for another example, the distribution system regulation and control instruction may be automatically generated each time the end time of the current distribution stage is obtained, and the end time of the current distribution stage is used as the instruction designated time. Therefore, the method realizes regular or even near real-time monitoring of the burden distribution furnace conditions in nearly two periods, so as to regulate and control the burden distribution system in time according to changes of the burden distribution furnace conditions, ensure smooth operation of the blast furnace and prevent serious abnormity.
Preferably, the control instruction generating module 300 may further be connected to a data output end of the data acquiring module 100, and is configured to: when the data acquisition module 100 acquires data information such as instruction designated time, cycle time span, regulation starting command and the like according to the setting of an operator, the data information is received from the data acquisition module 100, and the material distribution system regulation command is generated according to the data information.
For example, the regulation and control instruction generating module 300 may input information according to the requirement of an operator to generate the distribution system regulation and control instruction, and accordingly may determine an instruction designated time and a cycle time span according to the requirement input information of the operator, so that the operator can perform the regulation and control of the distribution system in a targeted manner. For another example, the operator may designate a certain historical time as an instruction designated time, so as to query the distribution condition of the blast furnace in a period before the historical time.
Further preferably, the burden distribution regulation and control instruction may further include a specified burden, and the regulation and control instruction generation module 300 extracts burden distribution data of each burden distribution stage of the specified burden in two cycles traced back from the specified time of the instruction from the long-term database according to the burden distribution regulation and control instruction, so as to convey the extracted burden distribution data of the burden distribution stages to the data processing module 400 for data processing. For example, in the distribution system regulation instruction, if the specified furnace burden is ore, the regulation instruction generation module 300 extracts, from the long-term database, distribution data of each distribution stage of the ore in two cycles back-traced from the specified time of the instruction.
The data processing module 400 is connected to the instruction output end of the regulation and control instruction generating module 300, and is configured to perform data processing on the data extracted by the regulation and control instruction generating module 300 according to the distribution regulation and control instruction.
Specifically, the data processing module 400 is configured to: and calculating the variation of the furnace condition characterization parameters in each distribution stage extracted by the regulation and control instruction generation module 300.
The variation of the furnace condition characterizing parameter in each distributing stage, i.e. the difference between the ending time of the distributing stage and the starting time of the distributing stage of the furnace condition characterizing parameter.
In a preferred embodiment, the data processing module 400 calculates the variation of the secondary edge furnace condition characterizing parameter in each distribution stage, for example, preferably, the variation △ T1 of the secondary edge temperature average in each distribution stage is T1 '-T1, and the data processing module 400 calculates the variation of the secondary center furnace condition characterizing parameter in each distribution stage, for example, preferably, the variation △ T2 of the secondary center temperature average in each distribution stage is T2' -T2.
The data processing module 400 is further configured to: and calculating the next accumulated times when the variation meets the target condition in the next period and the previous accumulated times when the variation meets the target condition in the previous period.
For the previous period, the data processing module 400 determines whether the variation of the furnace condition characterizing parameter in each distribution stage meets the target condition, and if so, counts 1 time in the previous accumulated times, so that the previous accumulated times are obtained by accumulating the determination results of each distribution stage in the previous period; similarly, for the next period, the data processing module 400 determines whether the variation of the furnace condition characterizing parameter in each material distribution stage meets the target condition, and if so, counts 1 time in the next accumulated number of times, so as to obtain the next accumulated number of times through the determination result of each material distribution stage in the next period in an accumulated manner.
In a preferred embodiment, the data processing module 400 counts a previous cumulative number of times that the variation of the secondary edge furnace condition characterizing parameter satisfies the target condition and a subsequent cumulative number of times that the variation of the secondary edge furnace condition characterizing parameter satisfies the target condition. Further, the data processing module 400 also calculates the previous accumulated number of times that the variation of the sub-center furnace condition characterizing parameter satisfies the target condition, and calculates the next accumulated number of times that the variation of the sub-center furnace condition characterizing parameter satisfies the target condition.
Wherein, for two different furnace condition characterization parameters, the corresponding target conditions are set to be different. For example, the target conditions for the sub-edge furnace condition characterizing parameter and the sub-center furnace condition characterizing parameter are different.
In addition, for the furnace throat temperature in the preferred embodiment as the furnace condition characterizing parameter, the target condition is that the absolute value is within the target range interval.
In a preferred embodiment, the data processing module 400 determines the variation | Δ T1| ∈ (T0, + ∞) of the average value of the secondary edge temperatures in each distribution stage for the previous cycle, and then obtains the previous accumulated number of times D1 based on the determination result of each distribution stage in the previous cycle0Similarly, for the next period, the data processing module 400 determines the variation | Δ T1| ∈ (T0, + ∞) of the average value of the secondary edge temperatures in each distribution stage, and then obtains the next accumulated number of times D1 based on the determination result of each distribution stage in the next period1. Wherein, when the designated charging material is ore, T0 can be set to 2 ℃, and in each distribution stage of the ore, if the variation | Delta T1| of the average value of the temperature of the secondary edge exceeds 2 ℃, the furnace edge or the edge close to the furnace edge is easy to collapse or even collapse already occurs in the distribution stage. In this sub-step, the variation | Δ T1| of the secondary edge temperature average value by the data processing module 400 is larger than the previous accumulation of T0Number of counts D10And the latter cumulative number of times D11The calculation can facilitate the determination of the material distribution condition development rule of the edge or the near edge of the blast furnace in the previous period and the next period.
Further, in a preferred embodiment, for the previous cycle, the data processing module 400 determines the variation | Δ T2| ∈ (T0', + ∞) of the mean value of the secondary central temperature in each distribution stage, and then obtains the previous cumulative number of times D2 based on the determination result of each distribution stage in the previous cycle0Similarly, for the next period, the data processing module 400 determines the variation | Δ T2| ∈ (T0', + ∞) of the mean value of the secondary center temperature in each distribution stage, and then obtains the next accumulated number of times D2 based on the determination result of each distribution stage in the next period1. Wherein, when the designated charging material is ore, T0' can be set to 50 ℃, and in each distribution stage of the ore, if the variation | Delta T2| of the average value of the sub-center temperature exceeds 50 ℃, the center or the position close to the center of the blast furnace in the distribution stage is easy to collapse and even already collapses. In this sub-step, the variation | Δ T2| of the sub-center temperature average value by the data processing module 400 exceeds the previous accumulated number of times D2 of T00And the latter cumulative number of times D21The calculation can be carried out, so that the development rule of the material distribution condition in the previous period and the later period at the center or close to the center of the blast furnace can be conveniently determined.
The data processing module 400 is further configured to: calculating the change rate of the next accumulated number compared with the previous accumulated number.
In a preferred embodiment, for the sub-edge furnace condition characterizing parameter, the data processing module 400 calculates the rate of change of the corresponding next accumulated number compared to the previous accumulated number. For example, preferably, the previous accumulated number of times D1 based on the previous sub-step is obtained for the secondary edge temperature average0And the latter cumulative number of times D11The data processing module 400 calculates the change rate V1 ═ (D1)1-D10)/D10。
Similarly, in the preferred embodiment, for sub-center furnace condition characterizing parameters, the data processing module 400 also calculates their corresponding sub-center furnace condition characterizing parametersThe rate of change of the latter cumulative count compared to the former cumulative count. For example, preferably, the sub-center temperature average value is based on the previous accumulated number of times D1 obtained in the previous sub-step0And the latter cumulative number of times D11The data processing module 400 calculates the change rate V2 ═ (D2)1-D20)/D20。
The data processing module 400 is further configured to: determining whether the change rate of the latter accumulated number of times compared to the former accumulated number of times meets a furnace condition degradation criterion.
Specifically, the data processing module 400 sets the furnace condition degradation standard in advance to be used as a basis for determining the change of the furnace condition of the material distribution in the next period compared with the previous period, and further determines whether to adjust the material distribution system. In a preferred embodiment, the furnace condition degradation criterion is greater than a furnace condition degradation threshold, and the rate of change satisfies the furnace condition degradation criterion, i.e. the rate of change is greater than the furnace condition degradation threshold.
Specifically, the furnace condition deterioration threshold value may be set to an arbitrary value equal to or greater than 0 as needed. In the present embodiment, it is preferable that the value is set to be greater than 0.3, and more specifically, may be 0.5, so that by setting the value to be greater than 0.3, when the change rate of the latter cumulative number of times compared to the former cumulative number of times is between 0 and the value, the burden distribution furnace conditions in the two preceding and succeeding cycles are considered to be substantially stable without adjusting the burden distribution system, thereby reducing the risk of abnormal furnace conditions caused by frequent and excessive adjustments of the burden distribution system. When the change rate of the latter accumulated number of times exceeds the value compared with the former accumulated number of times, the number of times of furnace condition abnormity occurring in the material distribution stage in the latter period is far greater than the number of times of furnace condition abnormity occurring in the material distribution stage in the former period, and at this time, adjustment of the material distribution system is required.
For example, when the change rate V1 > 0.5 for the secondary edge temperature average, i.e., the last cumulative number D1 of changes | Δ T1| ∈ (T0, + ∞) in the secondary edge temperature average1The previous accumulated number of times D1 of change | Δ T1| ∈ (T0, + ∞) from the secondary edge temperature average0By more than 50%, it can be determined that the edge of the furnace or the vicinity of the edge is on the cloth in the following cycleThe number of times of furnace condition abnormity occurring in the charging stage is far greater than the number of times of furnace condition abnormity occurring in the charging stage at the edge of the blast furnace or close to the edge in the previous period, and at the moment, the charging system adjustment is needed.
Similarly, for the sub-center furnace condition characterization parameter, the last accumulated number D2 of the variation V1 is greater than or equal to 0.5, i.e., the variation | Δ T2| ∈ (T0', + ∞) of the sub-center temperature average1The previous cumulative number of times D2 of the change | Δ T2| ∈ (T0', + ∞) from the mean value of the sub-center temperatures0In other words, the addition of the amount of the additive is more than 50%, so that the number of times of furnace condition abnormality occurring in the material distribution stage at the center or near the center of the blast furnace in the next period is far greater than the number of times of furnace condition abnormality occurring in the material distribution stage at the center or near the center of the blast furnace in the previous period, and at this time, adjustment of a material distribution system is required.
The data processing module 400 is further configured to: and when the change rate of the next accumulated time compared with the previous accumulated time meets the furnace condition degradation standard, calculating the change amplitude of each material distribution regulation and control parameter in the next period compared with the previous period.
The variation amplitude of each cloth control parameter in the next period compared with the previous period is a variation rate of the average value of the cloth control parameter in the next period compared with the average value of the cloth control parameter in the previous period.
In a preferred embodiment, in the substep, "calculating a variation width of each of the cloth control parameters in a subsequent period compared to a previous period" may specifically be: and respectively calculating the average value of each cloth control parameter in the next period and the average value of each cloth control parameter in the previous period, and calculating the variation amplitude of each cloth control parameter in the next period compared with the variation amplitude in the previous period according to the average value of the next period and the average value of the previous period.
The regulation and control module 500 is connected to the data output end of the data processing module 400, and is configured to: according to the variation range obtained by the calculation of the data processing module 400, one cloth control parameter with the largest variation range is screened out from all the cloth control parameters, and the cloth control parameter in the current cloth system is adjusted to approach the previous cycle so as to obtain the cloth system used in the subsequent cloth stage.
In a preferred embodiment, when the rate of change calculated by the data processing module 400 based on the secondary edge furnace condition characterizing parameter reaches a furnace condition degradation threshold: the data processing module 400 respectively calculates the average values { A1, B ] of the maximum distribution inclination angle of the chute and the edge distribution amount of a plurality of furnace charges in the next period11,…Bn1, and respectively calculating the average value of the maximum distribution inclination angle of the chute and the edge distribution amount of a plurality of charging materials in the previous period { A0, B }10,…Bn0 }; calculating the variation amplitude { (A1-A0)/A0 of the maximum distribution inclination angle of the chute and the edge distribution amount of a plurality of furnace materials in the next period compared with the previous period, (B)11-B10)/B10,…(Bn1-Bn0)/Bn0 }; then, the control module 500 adjusts the output voltage according to the variation amplitude { (A1-A0)/A0, (B)11-B10)/B10,…(Bn1-Bn0)/Bn0, screening a material distribution regulation and control parameter with the largest variation range from the maximum material distribution inclination angle of the chute and the edge material distribution amount of a plurality of furnace materials, and regulating the material distribution regulation and control parameter in the current material distribution system close to the previous cycle to obtain the material distribution system for the subsequent material distribution stage.
For example, when the data processing module 400 calculates the rate of change V1 ≧ 0.5 based on the secondary edge temperature average: the data processing module 400 further calculates the average value A1 of the maximum distribution inclination angle of the chute in the next period and the average value B of the ore edge distribution amount in the next period11. Average value B of coke edge distribution amount in the next period21. Average value A0 of chute maximum distribution inclination angle in previous period and average value B of ore edge distribution amount in previous period10. Average coke edge charge level over previous cycle B20; then calculating the variation amplitude (A1-A0)/A0 of the maximum distribution inclination angle of the chute in the next period compared with the previous period and the variation amplitude (B) of the ore edge distribution amount in the next period compared with the previous period11-B10)/B10. The variation of the coke edge charge in the subsequent cycle compared to the previous cycle (B)21-B20)/B20; then, the regulatory module 500 obtains (A1-A0)/A0, (B) by comparison21-B20)/B20、(B11-B10)/B1And (3) sequentially reducing 0, screening out the maximum distribution inclination angle of the chute, adjusting the maximum distribution inclination angle of the chute in the current distribution system to approach A0 in the previous period, and using the updated distribution system in the subsequent distribution stage of the blast furnace.
Similarly, in a preferred embodiment, when the rate of change calculated by the data processing module 400 based on the sub-central furnace condition characterizing parameter reaches a furnace condition degradation threshold: the data processing module 400 further calculates the average value { A1, C of the maximum distribution inclination angle of the chute and the central distribution amount of a plurality of furnace charges in the next period respectively11,…Cn1, and respectively calculating the average value of the maximum distribution inclination angle of the chute and the central distribution amount of a plurality of charging materials in the previous period { A0, C }10,…Cn0 }; then calculating the variation amplitude { (A1-A0)/A0 of the maximum distribution inclination angle of the chute and the central distribution amount of a plurality of furnace charges in the next period compared with the previous period, (C)11-C10)/C10,…(Cn1-Cn0)/Cn0 }; then, the control module 500 adjusts (C) according to the variation amplitude { (A1-A0)/A011-C10)/C10,…(Cn1-Cn0)/Cn0, screening out a cloth regulating and controlling parameter with the largest variation amplitude, and regulating the cloth regulating and controlling parameter in the current cloth system to approach the previous cycle to obtain the cloth system for the subsequent cloth stage.
For example, when the data processing module 400 calculates the rate of change V2 ≧ 0.5 based on the secondary-center temperature average: the data processing module 400 further calculates an average value A1 of the maximum distribution inclination angle of the chute in the next period and an average value C of the distribution amount of the ore center in the next period11. Average value C of coke center charge in the next period21. Average value A0 of chute maximum distribution inclination angle in the previous period and average value C of ore center distribution amount in the previous period10. Average value C of coke center charge in previous period20; then calculating the maximum distribution inclination angle of the chute in the next periodCompared with the change amplitude of the previous period (A1-A0)/A0, the change amplitude of the ore center distribution amount of the next period compared with the previous period (C)11-C10)/C10. The variation of the coke center charge in the following cycle compared to the preceding cycle (C)21-C20)/C20; thereafter, the regulatory module 500 obtains (C) by comparison11-C10)/C10、(A1-A0)/A0、(C21-C20)/C20 are reduced in sequence, the ore central distribution amount is screened out, and the ore central distribution amount in the current distribution system approaches to C in the previous period10, and further using the updated material distribution system for the subsequent material distribution stage of the blast furnace.
The regulatory module 500 is further configured to: and when the change rate of the latter accumulated times compared with the former accumulated times meets the furnace condition degradation standard, maintaining the current material distribution system. In the present preferred embodiment, when the change rate does not satisfy the furnace condition degradation criterion, that is, the change rate does not reach the furnace condition degradation threshold, the current material distribution regime may be maintained.
Further, the regulation and control system further includes an output module 600, and the output module 600 is configured to output the data information stored in the long-term database, the data processing result of the data processing module 400, and the regulation and control result of the regulation and control module 500 to an operator.
Preferably, the output mode of the output module 600 may be implemented by any one or a combination of sound, text, graph, light, and the like. The output module 60 may be configured as any one or combination of a speaker, a display screen, a warning light, etc., and may also be integrated with a portion of the user interaction port of the data acquisition module 100.
To sum up, the adjustment system of the blast furnace burden distribution system of the preferred embodiment has the following beneficial effects:
(1) the method comprises the steps that the starting time and the ending time of a material distribution stage are determined by collecting action signals of a material distribution device, and then the material distribution stage can be extracted from the whole blast furnace production, so that the material distribution stage can be accurately evaluated, and furnace condition characterization parameters such as furnace throat temperature, air supply pressure and the like are accurately and effectively associated with the material distribution stage;
(2) the method comprises the steps of establishing a database by taking the material distribution data of each material distribution stage as a basis, analyzing the furnace condition characterization parameters and the material distribution regulation and control parameters change rate of the next period and the previous period, accurately judging the change rate of the furnace condition, determining the material distribution regulation and control parameters which cause changes when the furnace condition is deteriorated, accurately giving an adjustment strategy of a material distribution system, even finding the furnace condition deterioration in advance before the furnace condition is seriously abnormal and optimizing the material distribution system, and has great significance for the smooth operation of a blast furnace;
(3) the method can evaluate, match and analyze furnace conditions and material distribution systems of radial material distribution positions of the blast furnace such as a secondary edge, a secondary center and the like, and realize accurate adjustment of the material distribution system to material distribution regulation and control parameters corresponding to radial specific positions of the blast furnace, so that the adjustment of the material distribution system is more refined.
For convenience of description, the regulation and control system is described by dividing functions into various modules and describing the regulation and control method by dividing logic into various steps. The functions of the modules, logic of the steps, and/or the like may be implemented in any suitable combination of one or more of software, hardware, firmware in the practice of the invention, for example, the regulatory system and the regulatory method may be implemented by any one or combination of computer devices 12 including memory and processors, computer readable storage media storing computer programs, or any other suitable machine having at least one processor.
The above-described embodiments of the regulation system are merely exemplary, wherein the modules described as separate components may or may not be physically separate, and the components described as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules, such as the internet 11. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiment.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (13)
1. A method for regulating and controlling a blast furnace burden distribution system is characterized by comprising the following steps,
acquiring material distribution data of a single material distribution stage: collecting action signals of a material distribution device, and determining the starting time and the ending time of a material distribution stage; collecting material distribution regulation and control parameters in a material distribution system adopted in the material distribution stage; collecting furnace condition characterization parameters at the starting time and the ending time of a material distribution stage;
establishing a long-term database based on the acquired material distribution data of each material distribution stage;
generating a material distribution system regulation and control instruction, and extracting material distribution data of each material distribution stage in two periods backtracking from the instruction designated moment from the long-term database;
calculating the variation of the extracted furnace condition characterization parameters in each material distribution stage, calculating the next accumulated times when the variation meets the target condition in the next period and the previous accumulated times when the variation meets the target condition in the previous period, and calculating the change rate of the next accumulated times compared with the previous accumulated times;
when the rate of change meets furnace condition degradation criteria: and calculating the variation amplitude of each cloth regulation parameter in the next period compared with the previous period, screening out the cloth regulation parameter with the largest variation amplitude, and adjusting the cloth regulation parameter in the current cloth system to approach the previous period to obtain the cloth system for the subsequent cloth stage.
2. The method for controlling a burden distribution system of a blast furnace as claimed in claim 1, wherein the step of determining the start time and the end time of the burden distribution stage according to the operation signal of the burden distribution means comprises:
when an opening action signal of a material flow valve of the charging bucket is acquired, determining the starting moment of a material distribution stage, and when a closing action signal of the material flow valve of the charging bucket is acquired, determining the ending moment of the material distribution stage; alternatively, the first and second electrodes may be,
when a lifting movement signal of the mechanical stock rod is acquired, determining the starting time of a material distribution stage, and when a releasing movement signal of the mechanical stock rod is acquired, determining the finishing time of the material distribution stage; alternatively, the first and second electrodes may be,
after collecting the lifting movement signal of the mechanical measuring rod, when collecting the opening movement signal of the material flow valve of the charging bucket in a certain time interval, determining the starting moment of the material distribution stage, and after collecting the closing movement signal of the material flow valve of the charging bucket, when collecting the lowering movement signal of the mechanical measuring rod in a certain time interval, determining the ending moment of the material distribution stage.
3. The method for regulating and controlling the burden distribution system of the blast furnace according to claim 1, wherein in the step of generating a burden distribution system regulation and control instruction and extracting burden distribution data of burden distribution stages in two cycles back from the instruction-designated time from the long-term database, the burden distribution system regulation and control instruction is periodically generated, and the burden distribution data of the burden distribution stages in two cycles back from the instruction-designated time is extracted from the long-term database by taking the generation time of the burden distribution system regulation and control instruction as the instruction-designated time.
4. The method as claimed in claim 1, wherein the variation of each distribution control parameter in the following period compared to the preceding period is a variation rate of an average value of the distribution control parameter in the following period compared to an average value of the distribution control parameter in the preceding period.
5. The method for regulating and controlling the burden distribution system of the blast furnace as claimed in claim 1, wherein the burden distribution regulation and control parameters comprise a maximum burden distribution inclination angle of the chute and burden distribution regulation and control parameters at positions corresponding to the burden distribution positions of the blast furnace in the radial direction;
the furnace condition characterization parameters comprise position furnace condition characterization parameters corresponding to the radial material distribution position of the blast furnace;
in the method of regulation:
calculating the variation of the position furnace condition characterization parameters in each material distribution stage, calculating the next accumulated times when the variation meets the target condition in the next period and the previous accumulated times when the variation meets the target condition in the previous period, and calculating the change rate of the next accumulated times compared with the previous accumulated times; when the rate of change meets furnace condition degradation criteria: respectively calculating the variation amplitude of the chute maximum material distribution inclination angle and the position material distribution regulation and control parameter in the next period compared with the previous period, screening out one material distribution regulation and control parameter with the maximum variation amplitude from the chute maximum material distribution inclination angle and the position material distribution regulation and control parameter, and adjusting the material distribution regulation and control parameter in the current material distribution system to approach the previous period so as to obtain the material distribution system for the subsequent material distribution stage.
6. The method for controlling the burden distribution system of the blast furnace as claimed in any one of claims 1 to 5, wherein the burden distribution control parameters comprise the maximum burden distribution inclination angle of the chute, the edge burden distribution amount of a plurality of burden materials and/or the central burden distribution amount of a plurality of burden materials;
the furnace condition characterization parameters comprise secondary edge furnace condition characterization parameters and/or secondary center furnace condition characterization parameters;
in the method of regulation:
calculating the variation of the secondary edge furnace condition characterization parameters in each material distribution stage, calculating the next accumulated times that the variation meets the target condition in the next period and the previous accumulated times that the variation meets the target condition in the previous period, and calculating the comparison of the next accumulated timesThe rate of change over the previous cumulative number of times; when the rate of change meets furnace condition degradation criteria: respectively calculating the average values (A1, B) of the maximum distribution inclination angle of the chute and the edge distribution amount of a plurality of furnace charges in the next period11,…Bn1 and average value in previous cycle A0, B10,…Bn0, calculating the change amplitude { (A1-A0)/A0 of the maximum distribution inclination angle of the chute and the edge distribution amount of a plurality of charging materials in the next period compared with the previous period, (B)11-B10)/B10,…(Bn1-Bn0)/Bn0, screening out a cloth regulating and controlling parameter with the largest variation amplitude, and regulating the cloth regulating and controlling parameter in the current cloth system to approach the previous cycle to obtain the cloth system for the subsequent cloth stage; and/or the like, and/or,
calculating the variation of the secondary central furnace condition characterization parameters in each material distribution stage, calculating the next accumulated times when the variation meets the target condition in the next period and the previous accumulated times when the variation meets the target condition in the previous period, and calculating the change rate of the next accumulated times compared with the previous accumulated times; when the rate of change meets furnace condition degradation criteria: respectively calculating the average values (A1, C) of the maximum distribution inclination angle of the chute and the central distribution amount of a plurality of furnace charges in the next period11,…Cn1 and average value in previous cycle A0, C10,…Cn0, calculating the maximum distribution inclination angle of the chute, the change amplitude of the central distribution amount of a plurality of charging materials in the next period compared with the previous period { (A1-A0)/A0, (C)11-C10)/C10,…(Cn1-Cn0)/Cn0, screening out a cloth regulating and controlling parameter with the largest variation amplitude, and regulating the cloth regulating and controlling parameter in the current cloth system to approach the previous cycle to obtain the cloth system for the subsequent cloth stage.
7. The method for controlling the burden distribution system of the blast furnace according to claim 6, wherein the burden distribution system is a multi-ring burden distribution system and has at least four ring positions which are sequentially distributed from the edge of the blast furnace to the center of the blast furnace, the marginal burden distribution amount is the ratio of the number of chute turns of two ring positions close to the edge of the blast furnace to the total number of chute turns of all ring positions, and the central burden distribution amount is the ratio of the number of chute turns of two ring positions close to the center of the blast furnace to the total number of chute turns of all ring positions;
the secondary edge furnace condition characterization parameters are secondary edge temperature average values of the furnace throat cross temperature measuring device in four directions, and the secondary central furnace condition characterization parameters are secondary central temperature average values of the furnace throat cross temperature measuring device in four directions.
8. The method for controlling a blast furnace burden distribution system according to claim 7, wherein the target condition is that an absolute value is within a target range interval;
the furnace condition degradation criterion is greater than 0.5.
9. A regulation and control system of a blast furnace burden distribution system is characterized by comprising,
the data acquisition module is used for acquiring the cloth data of a single cloth stage, and comprises the following components: collecting action signals of a material distribution device, and determining the starting time and the ending time of a material distribution stage; collecting material distribution regulation and control parameters in a material distribution system adopted in the material distribution stage; collecting furnace condition characterization parameters at the starting time and the ending time of a material distribution stage;
the data storage module is connected with the data acquisition module and used for receiving and storing the cloth data of each cloth stage from the data acquisition module so as to establish a long-term database;
the regulation and control instruction generation module is connected with the data storage module and used for generating a material distribution system regulation and control instruction and extracting material distribution data of each material distribution stage in two periods backtracking from the instruction designated moment from the long-term database;
the data processing module is connected with the regulation and control instruction generating module and is used for: calculating the variation of the extracted furnace condition characterization parameters in each material distribution stage, calculating the next accumulated times when the variation meets the target condition in the next period and the previous accumulated times when the variation meets the target condition in the previous period, and calculating the change rate of the next accumulated times compared with the previous accumulated times; and further for, when the rate of change meets furnace condition degradation criteria: calculating the variation amplitude of each cloth regulation parameter in the next period compared with the variation amplitude in the previous period;
the regulation and control module is connected with the data processing module and is used for: and according to the variation amplitude obtained by the calculation of the data processing module, screening a maximum cloth control parameter from all the cloth control parameters, and adjusting the cloth control parameter in the current cloth system close to the previous cycle to obtain the cloth system for the subsequent cloth stage.
10. The system for regulating and controlling the burden distribution system of the blast furnace as claimed in claim 9, wherein the data acquisition module is configured to:
when an opening action signal of a material flow valve of the charging bucket is acquired, determining the starting moment of a material distribution stage, and when a closing action signal of the material flow valve of the charging bucket is acquired, determining the ending moment of the material distribution stage; alternatively, the first and second electrodes may be,
when a lifting movement signal of the mechanical stock rod is acquired, determining the starting time of a material distribution stage, and when a releasing movement signal of the mechanical stock rod is acquired, determining the finishing time of the material distribution stage; alternatively, the first and second electrodes may be,
after collecting the lifting movement signal of the mechanical measuring rod, when collecting the opening movement signal of the material flow valve of the charging bucket in a certain time interval, determining the starting moment of the material distribution stage, and after collecting the closing movement signal of the material flow valve of the charging bucket, when collecting the lowering movement signal of the mechanical measuring rod in a certain time interval, determining the ending moment of the material distribution stage.
11. The system of claim 9, wherein the control instruction generating module is further configured to: and regularly generating a material distribution system regulation and control instruction, taking the generation time of the material distribution system regulation and control instruction as an instruction designated time, and extracting material distribution data of each material distribution stage in two periods backtracking from the instruction designated time from the long-term database.
12. The system of claim 9, wherein the distribution parameters include a maximum chute distribution tilt angle, an edge distribution amount of a plurality of charges, and/or a center distribution amount of a plurality of charges;
the furnace condition characterization parameters comprise secondary edge furnace condition characterization parameters and/or secondary center furnace condition characterization parameters;
the data processing module is further configured to: calculating the variation of the secondary edge furnace condition characterization parameters in each material distribution stage, calculating the next accumulated times when the variation meets the target condition in the next period and the previous accumulated times when the variation meets the target condition in the previous period, and calculating the change rate of the next accumulated times compared with the previous accumulated times; when the change rate meets the furnace condition degradation standard, respectively calculating the change amplitude of the maximum distribution inclination angle of the chute and the edge distribution amount of a plurality of furnace materials in the next period compared with the previous period; the regulatory module is further configured to: according to the variation amplitude obtained by the calculation of the data processing module, a material distribution regulation and control parameter with the largest variation amplitude is screened from the maximum material distribution inclination angle of the chute and the edge material distribution amount of a plurality of furnace materials, and the material distribution regulation and control parameter in the current material distribution system is adjusted towards the previous cycle to obtain the material distribution system for the subsequent material distribution stage; and/or the like, and/or,
the data processing module is further configured to: calculating the variation of the secondary central furnace condition characterization parameters in each distribution stage, calculating the next accumulated time when the variation meets the target condition in the next period, the previous accumulated time when the variation meets the target condition in the previous period, calculating the change rate of the next accumulated time compared with the previous accumulated time, and when the change rate meets the furnace condition degradation standard, respectively calculating the maximum distribution inclination angle of the chute and the change amplitude of the central distribution amount of a plurality of furnace charges compared with the previous period in the next period; the regulatory module is further configured to: and according to the variation amplitude obtained by the calculation of the data processing module, screening a distribution regulation and control parameter with the largest variation amplitude from the maximum distribution inclination angle of the chute and the central distribution amount of a plurality of furnace charges, and adjusting the distribution regulation and control parameter in the current distribution system close to the previous cycle to obtain the distribution system for the subsequent distribution stage.
13. The system for regulating and controlling the burden distribution system of the blast furnace according to claim 12, wherein the burden distribution system is a multi-ring burden distribution system and has at least four ring positions which are sequentially distributed from the edge of the blast furnace to the center of the blast furnace, the marginal burden distribution amount is the ratio of the number of chute turns of two ring positions close to the edge of the blast furnace to the total number of chute turns of all ring positions, and the central burden distribution amount is the ratio of the number of chute turns of two ring positions close to the center of the blast furnace to the total number of chute turns of all ring positions;
the secondary edge furnace condition characterization parameters are secondary edge temperature average values of the furnace throat cross temperature measuring device in four directions, and the secondary central furnace condition characterization parameters are secondary central temperature average values of the furnace throat cross temperature measuring device in four directions.
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