CN108153232B - Automatic control system and control method for feeding to converter high-level stock bin - Google Patents
Automatic control system and control method for feeding to converter high-level stock bin Download PDFInfo
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- CN108153232B CN108153232B CN201611105718.2A CN201611105718A CN108153232B CN 108153232 B CN108153232 B CN 108153232B CN 201611105718 A CN201611105718 A CN 201611105718A CN 108153232 B CN108153232 B CN 108153232B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/188—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by special applications and not provided for in the relevant subclasses, (e.g. making dies, filament winding)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/32—Filling devices
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Abstract
The invention relates to an automatic control system for feeding a converter high-level stock bin, which is characterized by comprising a comprehensive control module; the device comprises a feeding clock control module, a high-level stock bin feeding amount calculation module, a feeding priority determination module, a material bulk density correction module, a feeding trolley control module, an underground stock yard vibration feeding control module, a feeding amount real-time metering module and a feeding process comprehensive control module, wherein the comprehensive control module is respectively connected with the feeding clock control module, the high-level stock bin feeding amount calculation module, the feeding priority determination module, the material bulk density correction module and the feeding process comprehensive control module, and the feeding process comprehensive control module is simultaneously connected with the feeding trolley control module, the underground stock yard vibration feeding control module and the feeding amount real-time metering module.
Description
Technical Field
The invention relates to a control system and a control method, in particular to an automatic control method for feeding a converter high-level storage bin, and belongs to the technical field of automatic control.
Background
In the converter steelmaking process, auxiliary materials such as lime and alloy raw materials need to be added, and all the auxiliary materials and the alloy are transported by an underground stock ground through a belt and added into an overhead bunker. Underground stock ground is reinforced to high-order feed bin, mainly judges the high-order feed bin condition through the manual work and carries out the material loading again, causes the wrong material easily, the untimely circumstances such as takes place, influences the production of converter, also needs a large amount of manual operation simultaneously, and economic effect is poor, and working strength is high to there is certain error in the control accuracy, and technical personnel in the field try new scheme always, but this problem has not been properly solved always.
Disclosure of Invention
The invention provides an automatic control method for feeding a converter high-position bin aiming at the technical problems in the prior art, and the method monitors the material condition of the high-position bin in real time through automatic control of a feeding system, realizes automatic operation of feeding, greatly reduces the operation intensity and greatly improves the control precision.
In order to achieve the aim, the technical scheme of the invention is that the automatic control system for feeding the converter high-level storage bin is characterized by comprising a comprehensive control module; the system comprises a feeding clock control module, a high-level stock bin feeding amount calculation module, a feeding priority determination module, a material bulk density correction module, a feeding trolley control module, an underground stock yard vibration feeding control module, a feeding amount real-time metering module and a feeding process comprehensive control module, wherein the comprehensive control module is respectively connected with the feeding clock control module, the high-level stock bin feeding amount calculation module, the feeding priority determination module, the material bulk density correction module and the feeding process comprehensive control module, and the feeding process comprehensive control module is simultaneously connected with the feeding trolley control module, the underground stock yard vibration feeding control module and the feeding amount real-time metering module;
the integrated control module is characterized in that: the coordination control is used for each control module; the feeding clock control module: the timing of a feeding clock is used, namely the cycle period of periodic feeding; the high-level stock bin loading amount calculation module comprises: the device is used for calculating the loading quantity of each overhead bin; the feeding priority determining module: the system is used for determining the feeding priority of the high-level bins, namely the feeding sequence of the high-level bins; the material bulk density correction module comprises: used for correcting the bulk density of the material; the feeding trolley control module comprises: the control device is used for controlling the movement of the feeding trolley; the underground stock ground vibration feeding control module comprises: the control of a vibrating feeder for feeding the underground stock ground; the real-time metering module of the feeding amount comprises: the device is used for metering the feeding amount in real time in the feeding process; the feeding process comprehensive control module comprises: the method is used for the comprehensive control of the feeding process of each storage bin.
An automatic control method for feeding a converter high-order storage bin is characterized by comprising the following steps of 1) a feeding clock control module performs feeding timing, and when the timing time is integral multiple of a feeding time interval delta T, the feeding clock control module informs a comprehensive control module through a network system, so that a new feeding period starts; otherwise, continuing the step and continuing timing;
2) the comprehensive control module receives a new feeding period starting signal of the feeding clock control module and informs the high-order bin feeding amount calculation module to calculate the feeding amount of each bin;
21) determining a bin needing to be loaded;
each high-order feed bin sets for a material loading material level, when current material level is less than the material loading material level, except the feed bin of the material loading of limiting quantity, then this feed bin need carry out the material loading to reduce the number of times of material loading, raise the efficiency.
22) The feeding amount is calculated by limited feeding;
the charging quantity Wm is calculated under the conditions that maintenance, material change and the like are needed after a plurality of smelting times, and the stock bins need to be emptied after the corresponding smelting times are finished (assuming that the mth stock bin needs to be charged in a limited quantity).
According to the production plan of the converter process control system, after the feeding is finished, according to the number K of the furnaces needing to be produced according to the steel grade and the average consumption WK of the materials of the storage bin required by the production of each furnace, then
Wm = ∑ K * WK - W0
Wherein, W0 is the original material volume of feed bin.
The elevated bunker is shown in fig. 1, all dimensions are known, and the upper and bottom area S of the material can be easily calculated by knowing the height h of the material level, so that:
assuming that h is less than h1, where ρ is the bulk density of the silo material, a weighted average of the previous q charges is taken.
ρ = （ρ1 + 2*ρ2 + 3*ρ3+…+ q*ρq） / （1 + 2 + 3 +…+ q）；
23) Calculating the feeding amount by non-limited feeding
In the case that the silo does not need to be emptied after a plurality of heats, the materials are loaded until the silo is full, and the material quantity W1 and W2 … Wn to be added are calculated according to the material level measured by the material level meter (assuming that n high-level silos are provided in total).
The volume of each bin is fixed, and the volume is set as V (assuming that the feeding amount of the kth bin is calculated);
when the material level h in the middle is greater than h1
Wk = S (h 2-h) ρ
When the material level height h in the middle shaft is less than or equal to h1
Wk = V - W0
Wherein, W0 is the original material volume of feed bin.
3) After the high-level bin feeding amount calculation module calculates the feeding amount of each bin, the comprehensive control module is informed to determine the starting priority of feeding;
4) after receiving a starting signal for determining the feeding priority, the comprehensive control module informs the feeding priority determination module to determine the feeding priority;
the bin priority refers to the feeding sequence of each bin. The priority determination method has 2 methods:
the method comprises the following steps: the material loading trolley is divided according to the distribution condition of the material bins, generally the sequential division from left to right (or from right to left) is adopted, and the material loading trolley has the advantages that the moving times and the moving distance of the material loading trolley in the material loading process can be reduced, and the material loading efficiency is improved;
the method 2 comprises the following steps: the material loading quantity is divided according to the requirement, the bin with more material loading has high priority, the bin with less material loading has low priority, and the method has the advantages that the bin with less material loading is required to be loaded preferentially, and the production accident is prevented or reduced from being influenced by less material in the bin.
And selecting a corresponding priority determination method through a priority selection picture on an HMI picture of the system so as to determine the loading priority of each high-level bin.
5) The feeding process comprehensive control module controls the feeding process according to the priority of each bin; after the feeding process is finished, the comprehensive control module informs the material bulk density correction module to correct the material bulk density;
51) selecting the bin with the highest priority according to the priority sequence;
52) the feeding trolley control module controls the feeding trolley to move to the charging opening of the corresponding bin;
53) the vibration feeding control module of the underground stock ground controls a vibration feeder of the stock ground corresponding to the material in the underground stock ground to start vibration feeding;
54) the real-time measuring module of the feeding amount measures the feeding amount in the feeding process in real time, and when the calculated feeding amount is larger than or equal to the Wi calculated in the step 2, the vibrating feeder stops vibrating feeding;
Wi0 = Δt * SP
and the SP is the vibration feeding speed of the vibrating feeder.
55) And (4) delaying delta T2 (ensuring that the materials on the feeding belt are added into the corresponding high-level bins), judging whether all the high-level bins needing to be fed are completely fed, and if not, turning to the step 2).
ΔT2 = k1 * Lbelt / Vbelt
Wherein Lbalt is the belt length;
vbelt is belt speed;
k1 is a constant, generally takes a value of 1.0-1.2, and is used for ensuring that materials on the belt can be completely added into the corresponding overhead bin.
6) The material bulk density correction module corrects the bulk density; turning to the step 1.
And calculating the volume of the last feeding according to the positions of the level gauges before and after the last feeding, and calculating the bulk density of the material according to the amount of the material added into the converter between two times of feeding (by using data recorded in a converter process control system database). And (5) delaying the time delta T, and turning to the step 1.
The bulk density calculation formula is as follows:
ρ = ∑Wj / （V 1 - V2）；
wherein Wj is the amount of all materials added into the converter smelting storage bin since the last feeding, V1 is the volume of the materials after the last feeding, and V2 is the volume of the residual materials before the current feeding.
If the storage bins of the material types are replaced, the bulk density of the materials since the previous q times is set as an initial value rho 0.
Compared with the prior art, the automatic control method has the advantages that the structure is simple, the use is convenient, the automatic control of the feeding of the high-level stock bin is realized through the method, the operation intensity is greatly reduced, the working efficiency and the control precision are improved, the original traditional equipment control is changed into the modernized digital control, and the large-scale popularization and application are facilitated.
Drawings
Fig. 1 is a structure diagram of a high-level storage bin, wherein the upper part of the high-level storage bin is a cube, and the lower part of the high-level storage bin is a regular cone.
FIG. 2 is a schematic view of a feeding system
FIG. 3 is a logic diagram of each control module of the feeding system
Wherein, 1: a feeding belt; 2: a storage bin of an underground stock ground; 3: a vibrating feeder; 4: a feeding trolley; 5: an elevated bunker.
The specific implementation mode is as follows:
for the purpose of enhancing an understanding of the present invention, the present embodiment will be described in detail below with reference to the accompanying drawings.
Example 1: referring to fig. 3, an automatic control system for feeding a converter high-level bunker, the control system includes a comprehensive control module; the system comprises a feeding clock control module, a high-level stock bin feeding amount calculation module, a feeding priority determination module, a material bulk density correction module, a feeding trolley control module, an underground stock yard vibration feeding control module, a feeding amount real-time metering module and a feeding process comprehensive control module, wherein the comprehensive control module is respectively connected with the feeding clock control module, the high-level stock bin feeding amount calculation module, the feeding priority determination module, the material bulk density correction module and the feeding process comprehensive control module, and the feeding process comprehensive control module is simultaneously connected with the feeding trolley control module, the underground stock yard vibration feeding control module and the feeding amount real-time metering module; the integrated control module is characterized in that: the coordination control is used for each control module; the feeding clock control module: the timing of a feeding clock is used, namely the cycle period of periodic feeding; the high-level stock bin loading amount calculation module comprises: the device is used for calculating the loading quantity of each overhead bin; the feeding priority determining module: the system is used for determining the feeding priority of the high-level bins, namely the feeding sequence of the high-level bins; the material bulk density correction module comprises: used for correcting the bulk density of the material; the feeding trolley control module comprises: the control device is used for controlling the movement of the feeding trolley; the underground stock ground vibration feeding control module comprises: the control of a vibrating feeder for feeding the underground stock ground; the real-time metering module of the feeding amount comprises: the device is used for metering the feeding amount in real time in the feeding process; the feeding process comprehensive control module comprises: the method is used for the comprehensive control of the feeding process of each storage bin.
Example 2: referring to fig. 3, an automatic control method for feeding a converter high-order bunker includes the steps of 1) a feeding clock control module performs feeding timing, and when the timing time is an integral multiple of a feeding time interval delta T, the feeding clock control module notifies a comprehensive control module through a network system, and a new feeding period starts; otherwise, continuing the step and continuing timing;
2) the comprehensive control module receives a new feeding period starting signal of the feeding clock control module and informs the high-order bin feeding amount calculation module to calculate the feeding amount of each bin;
21) determining a bin needing to be loaded;
each high-order feed bin sets for a material loading material level, when current material level is less than the material loading material level, except the feed bin of the material loading of limiting quantity, then this feed bin need carry out the material loading to reduce the number of times of material loading, raise the efficiency.
22) The feeding amount is calculated by limited feeding;
the charging quantity Wm is calculated under the conditions that maintenance, material change and the like are needed after a plurality of smelting times, and the stock bins need to be emptied after the corresponding smelting times are finished (assuming that the mth stock bin needs to be charged in a limited quantity).
According to the production plan of the converter process control system, after the feeding is finished, according to the number K of the furnaces needing to be produced according to the steel grade and the average consumption WK of the materials of the storage bin required by the production of each furnace, then
Wm = ∑ K * WK - W0
Wherein, W0 is the original material volume of feed bin.
The elevated bunker is shown in fig. 1, all dimensions are known, and the upper and bottom area S of the material can be easily calculated by knowing the height h of the material level, so that:
assuming that h is less than h1, where ρ is the bulk density of the silo material, a weighted average of the previous q charges is taken.
ρ = （ρ1 + 2*ρ2 + 3*ρ3+…+ q*ρq） / （1 + 2 + 3 +…+ q）；
23) Calculating the feeding amount by non-limited feeding
In the case that the silo does not need to be emptied after a plurality of heats, the materials are loaded until the silo is full, and the material quantity W1 and W2 … Wn to be added are calculated according to the material level measured by the material level meter (assuming that n high-level silos are provided in total).
The volume of each bin is fixed, and the volume is set as V (assuming that the feeding amount of the kth bin is calculated);
when the material level h in the middle is greater than h1
Wk = S (h 2-h) ρ
When the material level height h in the middle shaft is less than or equal to h1
Wk = V - W0
Wherein, W0 is the original material volume of feed bin.
3) After the high-level bin feeding amount calculation module calculates the feeding amount of each bin, the comprehensive control module is informed to determine the starting priority of feeding;
4) after receiving a starting signal for determining the feeding priority, the comprehensive control module informs the feeding priority determination module to determine the feeding priority;
the bin priority refers to the feeding sequence of each bin. The priority determination method has 2 methods:
the method comprises the following steps: the material loading trolley is divided according to the distribution condition of the material bins, generally the sequential division from left to right (or from right to left) is adopted, and the material loading trolley has the advantages that the moving times and the moving distance of the material loading trolley in the material loading process can be reduced, and the material loading efficiency is improved;
the method 2 comprises the following steps: the material loading quantity is divided according to the requirement, the bin with more material loading has high priority, the bin with less material loading has low priority, and the method has the advantages that the bin with less material loading is required to be loaded preferentially, and the production accident is prevented or reduced from being influenced by less material in the bin.
And selecting a corresponding priority determination method through a priority selection picture on an HMI picture of the system so as to determine the loading priority of each high-level bin.
5) The feeding process comprehensive control module controls the feeding process according to the priority of each bin; after the feeding process is finished, the comprehensive control module informs the material bulk density correction module to correct the material bulk density;
51) selecting the bin with the highest priority according to the priority sequence;
52) the feeding trolley control module controls the feeding trolley to move to the charging opening of the corresponding bin;
53) the vibration feeding control module of the underground stock ground controls a vibration feeder of the stock ground corresponding to the material in the underground stock ground to start vibration feeding;
54) the real-time measuring module of the feeding amount measures the feeding amount in the feeding process in real time, and when the calculated feeding amount is larger than or equal to the Wi calculated in the step 2, the vibrating feeder stops vibrating feeding;
Wi0 = Δt * SP
and the SP is the vibration feeding speed of the vibrating feeder.
55) And (4) delaying delta T2 (ensuring that the materials on the feeding belt are added into the corresponding high-level bins), judging whether all the high-level bins needing to be fed are completely fed, and if not, turning to the step 2).
ΔT2 = k1 * Lbelt / Vbelt
Wherein Lbalt is the belt length;
vbelt is belt speed;
k1 is a constant, generally takes a value of 1.0-1.2, and is used for ensuring that materials on the belt can be completely added into the corresponding overhead bin.
6) The material bulk density correction module corrects the bulk density; turning to the step 1.
And calculating the volume of the last feeding according to the positions of the level gauges before and after the last feeding, and calculating the bulk density of the material according to the amount of the material added into the converter between two times of feeding (by using data recorded in a converter process control system database). And (5) delaying the time delta T, and turning to the step 1.
The bulk density calculation formula is as follows:
ρ = ∑Wj / （V 1 - V2）；
wherein Wj is the amount of all materials added into the converter smelting storage bin since the last feeding, V1 is the volume of the materials after the last feeding, and V2 is the volume of the residual materials before the current feeding.
If the storage bins of the material types are replaced, the bulk density of the materials since the previous q times is set as an initial value rho 0.
Application example 1:
an automatic control method for feeding to a converter high-position bin, which is characterized in that the converter branch of a plum steel plant performs automatic feeding operation to the converter high-position bin (6 # bin feed opening vibrating feeder is arranged to be overhauled at the day 15:30 and needs an empty bin):
1) the feeding clock control module performs feeding timing, and when the timing time (1800 seconds) is an integral multiple of the feeding time interval 1800 seconds, the feeding clock control module informs the comprehensive control module through a network system, and a new feeding period starts;
2) the comprehensive control module receives a new feeding period starting signal of the feeding clock control module and informs the high-order bin feeding amount calculation module to calculate the feeding amount of each bin;
21) determining a bin needing to be loaded;
each high-order feed bin sets for a material loading material level, when current material level is less than the material loading material level, except the feed bin of the material loading of limiting quantity, then this feed bin need carry out the material loading to reduce the number of times of material loading, raise the efficiency.
The material loading level of each bin and the material level of the current bin are as shown in the table I:
| number of stock bin | 1# storehouse | 2 |
3 |
4 |
5# storehouse | 6# storehouse | …… | 24# storehouse | 25# storehouse | 26# storehouse | 27# storehouse | 28# storehouse |
| Material loading level (rice) | 0.78 | 1.15 | 1.15 | 0.88 | 2.32 | 1.85 | …… | 0.75 | 1.21 | 2.91 | 3.21 | 3.0 |
| Current material level (Rice) | 0.53 | 1.68 | 1.05 | 1.33 | 2.5 | 1.08 | …… | 0.88 | 1.54 | 2.75 | 3.31 | 3.89 |
Material loading level of table-bin and level meter of current bin
The bunker needing to be loaded is 1# bunker, 3# bunker, 6# bunker and 26# bunker.
22) The feeding amount is calculated by limited feeding;
according to the actual situation of production, the feed bin with limited feeding is a No. 6 feed bin, and the material is light calcined dolomite. According to the production plan of the converter process control system, after the feeding is finished, according to the steel grades: 4 furnaces of DP3451K1 steel grade with an average of 3.45 tons per furnace, 3 furnaces of IU5820A1 steel grade with an average of 2.63 tons per furnace, then
Wm = ∑ K * WK - W0
= （4* 3.45 + 3 * 2.63） - 7.56
= 14.13 (ton)
Wherein W0 (7.56 ton) is the original light calcined dolomite inventory in the storage bin.
23) Wherein the material adding amount is calculated by non-limited material feeding;
according to the actual situation of production, the bins with non-limited feeding comprise a 1# bin, a 3# bin and a 26# bin. The feeding amounts of the 1# bunker, the 3# bunker and the 26# bunker are calculated to be 20.55 tons, 25.64 tons and 36.3 tons respectively.
3) After the high-level bin feeding amount calculation module calculates the feeding amount of each bin, the comprehensive control module is informed to determine the starting priority of feeding;
4) after receiving a starting signal for determining the feeding priority, the comprehensive control module informs the feeding priority determination module to determine the feeding priority;
the priority determining method for the feeding sequence of each bin comprises the following steps:
the material loading quantity is divided according to the requirement, the bin with more material loading has high priority, the bin with less material loading has low priority, and the method has the advantages that the bin with less material loading is required to be loaded preferentially, and the production accident is prevented or reduced from being influenced by less material in the bin.
And determining the loading priority of each high-level bin by selecting a picture according to the priority on the HMI picture of the system and selecting a corresponding priority determination method. According to the HMI picture, the current priority is determined according to the order of the loading amount.
5) The feeding process comprehensive control module controls the feeding process according to the priority of each bin; after the feeding process is finished, the comprehensive control module informs the material bulk density correction module to correct the material bulk density;
51) selecting the bin with the highest priority according to the priority sequence;
the feeding priority is 26# stock bin, 3# stock bin, 1# stock bin and 6# stock bin.
52) The feeding trolley control module controls the feeding trolley to move to a corresponding feeding opening of the 26# storage bin;
53) the vibration feeding control module of the underground stock ground controls a vibration feeder of a 4-bin (the 4-bin of the underground stock ground is the same as the 26# bin material of the high-level bin) of the underground stock ground to start vibration feeding;
54) the real-time measuring module for the feeding amount measures the feeding amount in the feeding process in real time, and when the calculated feeding amount Wi0 is larger than or equal to 36.3 tons calculated in the step 2, the vibrating feeder stops vibrating feeding;
Wi0 = Δt * SP
wherein, Δ t is the time interval from the start of the vibration feeding of the vibration feeder to the current time, and SP (125 tons/hour) is the vibration feeding speed of the vibration feeder.
55) And (4) delaying delta T2 (ensuring that the materials on the feeding belt are added into the corresponding high-level bins), judging whether all the high-level bins needing to be fed are completely fed, and if not, turning to the step 2) to continue to circularly feed until the feeding of the 3# bin, the 1# bin and the 6# bin is completed.
Calculating the value of delta T2 when the overhead bunker 4# is loaded:
ΔT2 = k1 * Lbelt / Vbelt
= 1.1 * 351 / 120
= 3.21 (min)
6) The material bulk density correction module corrects the bulk density; turning to the step 1.
And calculating the volume of the last feeding according to the positions of the level gauges before and after the last feeding, and calculating the bulk density of the material according to the amount of the material added into the converter between two times of feeding (by using data recorded in a converter process control system database).
The bulk density calculation formula is as follows (here, 26# bin is taken as an example):
ρ = ∑Wj / （V 1 - V2）
= （2.88 + 3.12 + 2.95 +3.08 + 2.93 +2.81+ 3.22+2.87+3.11+2.97+3.15 +3.21）/ （39.99 - 9.32）
= 1.185 (ton/cubic meter)
And 6 bulk densities corresponding to the 26# bins are replaced:
ρ0 = ρ1；
ρ1 = ρ3；
ρ3 = ρ4；
ρ4 = ρ5；
ρ5= ρ6；
Ρ6= ρ。
application example 2:
the invention relates to an automatic control method for feeding a converter high-level bin, which is characterized in that a converter branch in a plum steel plant implements feeding operation on the converter high-level bin according to the method provided by the invention (the empty bin requirement of the reasons of no maintenance and material change on the day):
1) the feeding clock control module performs feeding timing, and when the timing time (1800 seconds) is an integral multiple of the feeding time interval 1800 seconds, the feeding clock control module informs the comprehensive control module through a network system, and a new feeding period starts;
2) the comprehensive control module receives a new feeding period starting signal of the feeding clock control module and informs the high-order bin feeding amount calculation module to calculate the feeding amount of each bin;
21) stock bin capable of determining material loading requirement
Each high-order feed bin sets for a material loading material level, when current material level is less than the material loading material level, except the feed bin of the material loading of limiting quantity, then this feed bin need carry out the material loading to reduce the number of times of material loading, raise the efficiency.
The material loading level of each bin and the material level of the current bin are as shown in the table I:
| number of stock bin | 1# storehouse | 2 |
3 |
4 |
5# storehouse | 6# storehouse | …… | 24# storehouse | 25# storehouse | 26# storehouse | 27# storehouse | n # storehouse |
| Material loading level (rice) | 0.78 | 1.15 | 1.15 | 0.88 | 2.32 | 1.85 | …… | 0.75 | 1.21 | 2.91 | 3.21 | 3.0 |
| Current material level (Rice) | 2.53 | 1.08 | 1.12 | 1.33 | 1.5 | 3.08 | …… | 1.58 | 1.14 | 2.55 | 4.01 | 4.89 |
Material loading level of table-bin and level meter of current bin
The bins needing to be loaded are a 2# bin, a 3# bin, a 5# bin, a 25# bin and a 26# bin.
22) Calculating the feeding amount by non-limited feeding
Because no empty bin requirement is caused by reasons such as maintenance, material change and the like on the same day, the bins for the non-limited feeding comprise a 2# bin, a 3# bin, a 5# bin, a 25# bin and a 26# bin. The feeding amounts of the 2# bunker, the 3# bunker, the 5# bunker, the 25# bunker and the 26# bunker are calculated to be 22.85 tons, 24.6 tons, 29.66 tons, 20.4 tons and 41.5 tons respectively.
3) After the high-level bin feeding amount calculation module calculates the feeding amount of each bin, the comprehensive control module is informed to determine the starting priority of feeding;
4) after receiving a starting signal for determining the feeding priority, the comprehensive control module informs the feeding priority determination module to determine the feeding priority;
the priority determining method for the feeding sequence of each bin comprises the following steps:
the material loading quantity is divided according to the requirement, the bin with more material loading has high priority, the bin with less material loading has low priority, and the method has the advantages that the bin with less material loading is required to be loaded preferentially, and the production accident is prevented or reduced from being influenced by less material in the bin.
And determining the loading priority of each high-level bin by selecting a picture according to the priority on the HMI picture of the system and selecting a corresponding priority determination method. According to the HMI picture, the current priority is determined according to the order of the loading amount.
5) The feeding process comprehensive control module controls the feeding process according to the priority of each bin; after the feeding process is finished, the comprehensive control module informs the material bulk density correction module to correct the material bulk density;
51) selecting the bin with the highest priority according to the priority sequence;
the feeding priority is 26# stock bin, 5# stock bin, 3# stock bin, 2# stock bin and 25# stock bin.
52) The feeding trolley control module controls the feeding trolley to move to a corresponding feeding opening of the 26# storage bin;
53) the vibration feeding control module of the underground stock ground controls a vibration feeder of a 4-bin (the 4-bin of the underground stock ground is the same as the 26# bin material of the high-level bin) of the underground stock ground to start vibration feeding;
54) the real-time measuring module for the feeding amount measures the feeding amount in the feeding process in real time, and when the calculated feeding amount Wi0 is larger than or equal to 41.5 tons calculated in the step 2, the vibrating feeder stops vibrating feeding;
Wi0 = Δt * SP
wherein, Δ t is the time interval from the start of the vibration feeding of the vibration feeder to the current time, and SP (128 tons/hour) is the vibration feeding speed of the vibration feeder.
55) And (4) delaying delta T2 (ensuring that the materials on the feeding belt are added into the corresponding high-level bins), judging whether all the high-level bins needing to be fed are completely fed, and if not, turning to the step 2) to continue to circularly feed until the feeding of the 1# bin, the 26# bin and the 3# bin is completed.
Calculating the value of delta T2 when the overhead bunker 26# is loaded:
ΔT2 = k1 * Lbelt / Vbelt
= 1.1 *418 / 120
= 3.83 (min)
6) The material bulk density correction module corrects the bulk density; turning to the step 1.
And calculating the volume of the last feeding according to the positions of the level gauges before and after the last feeding, and calculating the bulk density of the material according to the amount of the material added into the converter between two times of feeding (by using data recorded in a converter process control system database).
The bulk density calculation formula is as follows (taking 5# bunker as an example here):
ρ = ∑Wj / （V 1 - V2）
= （2.48 +2.35 + 2.65 + 2.24 +3.14 + 2.22+2.06+2.28+2.09+2.41+2.63+3.11）/ （34.5- 3.82）
= 0.967 (ton/cubic meter)
And 6 bulk densities corresponding to the 5# bins are replaced:
ρ0 = ρ1；
ρ1 = ρ3；
ρ3 = ρ4；
ρ4 = ρ5；
ρ5= ρ6；
Ρ6= ρ。
it should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and all equivalent modifications and substitutions based on the above-mentioned technical solutions are within the scope of the present invention as defined in the claims.
Claims (4)
1. An automatic control system for feeding materials to a converter high-position bin is characterized by comprising a comprehensive control module; the system comprises a feeding clock control module, a high-level stock bin feeding amount calculation module, a feeding priority determination module, a material bulk density correction module, a feeding trolley control module, an underground stock yard vibration feeding control module, a feeding amount real-time metering module and a feeding process comprehensive control module, wherein the comprehensive control module is respectively connected with the feeding clock control module, the high-level stock bin feeding amount calculation module, the feeding priority determination module, the material bulk density correction module and the feeding process comprehensive control module, and the feeding process comprehensive control module is simultaneously connected with the feeding trolley control module, the underground stock yard vibration feeding control module and the feeding amount real-time metering module; the integrated control module is characterized in that: the coordination control is used for each control module; the feeding clock control module: the timing of a feeding clock is used, namely the cycle period of periodic feeding; the high-level stock bin loading amount calculation module comprises: the device is used for calculating the loading quantity of each overhead bin; the feeding priority determining module: the system is used for determining the feeding priority of the high-level bins, namely the feeding sequence of the high-level bins; the material bulk density correction module comprises: used for correcting the bulk density of the material; the feeding trolley control module comprises: the control device is used for controlling the movement of the feeding trolley; the underground stock ground vibration feeding control module comprises: the control of a vibrating feeder for feeding the underground stock ground; the real-time metering module of the feeding amount comprises: the device is used for metering the feeding amount in real time in the feeding process; the feeding process comprehensive control module comprises: the device is used for comprehensively controlling the feeding process of each storage bin; the control method comprises the following steps of,
1) the feeding clock control module performs feeding timing, and when the timing time is integral multiple of the feeding time interval delta T, the feeding clock control module informs the comprehensive control module through the network system, and a new feeding period starts; otherwise, continuing the step and continuing timing; 2) the comprehensive control module receives a new feeding period starting signal of the feeding clock control module and informs the high-order bin feeding amount calculation module to calculate the feeding amount of each bin;
3) after the high-level bin feeding amount calculation module calculates the feeding amount of each bin, the comprehensive control module is informed to determine the starting priority of feeding;
4) after receiving a starting signal for determining the feeding priority, the comprehensive control module informs the feeding priority determination module to determine the feeding priority;
5) the feeding process comprehensive control module controls the feeding process according to the priority of each bin; after the feeding process is finished, the comprehensive control module informs the material bulk density correction module to correct the material bulk density;
6) the material bulk density correction module corrects the bulk density; turning to step 1).
2. An automatic control method for feeding a converter high-order storage bin is characterized by comprising the following steps of 1) a feeding clock control module performs feeding timing, and when the timing time is integral multiple of a feeding time interval delta T, the feeding clock control module informs a comprehensive control module through a network system, so that a new feeding period starts; otherwise, continuing the step and continuing timing; 2) the comprehensive control module receives a new feeding period starting signal of the feeding clock control module and informs the high-order bin feeding amount calculation module to calculate the feeding amount of each bin;
3) after the high-level bin feeding amount calculation module calculates the feeding amount of each bin, the comprehensive control module is informed to determine the starting priority of feeding;
4) after receiving a starting signal for determining the feeding priority, the comprehensive control module informs the feeding priority determination module to determine the feeding priority;
5) the feeding process comprehensive control module controls the feeding process according to the priority of each bin; after the feeding process is finished, the comprehensive control module informs the material bulk density correction module to correct the material bulk density;
6) the material bulk density correction module corrects the bulk density; turning to step 1).
3. The automatic control method for feeding the converter high-position storage bin according to claim 2, wherein the step 2) comprises the following steps:
21) determining a bin needing to be loaded;
each high-level bin is provided with a feeding material level, and when the current material level is lower than the feeding material level, the bin needs to be fed except for the bin with limited feeding, so that the feeding times are reduced, and the efficiency is improved;
22) the feeding amount is calculated by limited feeding;
calculating the material loading Wm of the time under the conditions that maintenance and material change are needed after smelting for a plurality of times and the material bins need to be emptied after the smelting is finished for the corresponding time, and assuming that the mth material bin needs to be fed in a limited amount;
according to the production plan of the converter process control system, after the feeding is finished, according to the number K of the furnaces needing to be produced according to the steel grade and the average consumption WK of the materials of the storage bin required by the production of each furnace, then
Wm＝∑K*WK-W0；
Wherein, W0 is the original material quantity of the storage hopper;
all sizes of the high-level storage bin are known, and under the condition that the material level height h is known, the upper and bottom areas S of the material can be easily calculated, and then:
assuming that h is smaller than h1, wherein rho is the bulk density of the bin material, and taking the weighted average of the previous q times of feeding;
ρ＝(ρ1+2*ρ2+3*ρ3+…+q*ρq)/(1+2+3+…+q)。
4. the automatic control method for feeding the converter high-position storage bin according to claim 2, wherein the step 5) comprises the following steps: 51) selecting the bin with the highest priority according to the priority sequence;
52) the feeding trolley control module controls the feeding trolley to move to the charging opening of the corresponding bin;
53) the vibration feeding control module of the underground stock ground controls a vibration feeder of the stock ground corresponding to the material in the underground stock ground to start vibration feeding;
54) the real-time measuring module of the feeding amount measures the feeding amount in the feeding process in real time, and when the calculated feeding amount is larger than or equal to the Wi calculated in the step 2, the vibrating feeder stops vibrating feeding;
55) and (4) delaying delta T2, judging whether all the high-level bins needing to be loaded are completely loaded, if not, switching to the bins with the priority level, and switching to the step 2).
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