WO2024021704A1 - Procédé et appareil de commande de température de dissolution, dispositif, et support de stockage - Google Patents

Procédé et appareil de commande de température de dissolution, dispositif, et support de stockage Download PDF

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Publication number
WO2024021704A1
WO2024021704A1 PCT/CN2023/089987 CN2023089987W WO2024021704A1 WO 2024021704 A1 WO2024021704 A1 WO 2024021704A1 CN 2023089987 W CN2023089987 W CN 2023089987W WO 2024021704 A1 WO2024021704 A1 WO 2024021704A1
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Prior art keywords
dissolution
percentage
feed amount
target period
unit
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PCT/CN2023/089987
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English (en)
Chinese (zh)
Inventor
周益文
陈首慧
赵清杰
张保伟
吴军
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中国铝业股份有限公司
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Publication of WO2024021704A1 publication Critical patent/WO2024021704A1/fr

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature

Definitions

  • the present disclosure belongs to the field of metallurgical technology and relates to a dissolution temperature control method, device, equipment and storage medium.
  • Dissolution temperature is the most important factor in the dissolution process and directly affects the dissolution effect.
  • the temperature control of the dissolution unit is mainly controlled manually by the operator. Since the feed amount, steam flow and other factors affect the dissolution temperature, in order to stabilize the dissolution temperature, the operator needs to pay attention to the unit parameters at all times and make frequent adjustments, which requires the operator to work intensively. This adjustment is easily affected by the working status of workers, and the dissolution temperature is prone to fluctuations, resulting in a low dissolution rate of alumina.
  • the present disclosure provides a dissolution temperature control method, device, equipment and storage medium.
  • the existing manual process of manually controlling the dissolution temperature is solved, which suffers from large dissolution temperature fluctuations and low dissolution rate. The problem.
  • a dissolution temperature control method is provided, which is applied to a dissolution unit.
  • the method includes: obtaining the feed flow rate of the dissolution unit, and based on the feed flow rate within the current target period, Determine the actual feed amount of the dissolution slurry of the dissolution unit; when it is detected that the actual feed amount is greater than the first percentage of the rated feed amount and less than the second percentage of the rated feed amount , determine the steam flow rate of the dissolution unit in the next target period; or detect that the actual feed amount is greater than the third percentage of the rated feed amount and less than the fourth percent of the rated feed amount.
  • the percentage determine the steam flow rate of the dissolution unit in the next target period; wherein the first percentage is less than the second percentage, and the second percentage is less than the third percentage, the third percentage is less than the fourth percentage; based on the steam flow rate, the actual steam flow rate of the dissolution unit in the next target period is controlled, so that the actual steam flow rate in the next target period is The dissolution temperature is within the preset range.
  • a dissolution temperature control device which is applied to a dissolution unit.
  • the device includes: a data acquisition unit for acquiring the feed flow rate of the dissolution unit, and based on the feed flow rate Within the current target period, determine the actual performance of the dissolution slurry produced by the dissolution unit. Feed amount; a data processing unit configured to determine that the actual feed amount is greater than the first percentage of the rated feed amount and less than the second percentage of the rated feed amount.
  • the steam flow rate of the dissolution unit in the next target period or when it is detected that the actual feed amount is greater than the third percentage of the rated feed amount and less than the fourth percentage of the rated feed amount, Determine the steam flow rate of the dissolution unit in the next target period; wherein the first percentage is less than the second percentage, the second percentage is less than the third percentage, so The third percentage is less than the fourth percentage; a control unit, configured to control the actual steam flow rate of the dissolution unit in the next target period based on the steam flow rate, so that the actual steam flow rate in the next target period is The dissolution temperature is within the preset range.
  • a dissolution temperature control device including a memory, a processor, and code stored in the memory and executable on the processor.
  • the processor executes the code, the first aspect is implemented. any implementation.
  • Figure 1 shows a flow chart of a dissolution temperature control method according to some embodiments of the present disclosure.
  • Figure 2 shows a schematic diagram of the structure of a dissolution temperature control device according to some embodiments of the present disclosure.
  • Figure 3 shows a schematic diagram of the structure of a dissolution temperature control device according to some embodiments of the present disclosure.
  • Figure 4 shows a schematic diagram of the structure of a computer-readable storage medium according to some embodiments of the present disclosure.
  • the present disclosure provides a dissolution temperature control method, device, equipment and storage medium.
  • the existing manual process of manually controlling the dissolution temperature is solved, which suffers from large dissolution temperature fluctuations and low dissolution rate. technical issues.
  • the grade value of the dissolution temperature deviation and the grade value of the dissolution temperature deviation change rate determine the next step of the dissolution unit Steam flow rate during target period.
  • the actual steam flow rate of the dissolution unit in the next target period is controlled based on the steam flow rate, so that the dissolution temperature in the next target period is within the preset range, effectively reducing the fluctuation of the dissolution temperature. move.
  • a dissolution temperature control method is provided, which can be applied to a dissolution unit, such as an alumina dissolution unit.
  • the dissolution temperature control method may include the following steps S101 to S103.
  • Step S101 Obtain the feed flow rate of the dissolution unit, and determine the actual feed amount of the dissolution slurry of the dissolution unit based on the feed flow rate within the current target period.
  • the target cycle can be set according to the actual application scenario. The longer the target cycle, the more accurate the actual feed amount determined.
  • the ratio of the feed flow rate of the dissolution unit to the target cycle can be used to determine the actual feed amount of the dissolution slurry to the dissolution unit.
  • Step S102 When it is detected that the actual feed amount is greater than the first percentage of the rated feed amount and less than the second percentage of the rated feed amount, or when it is detected that the actual feed amount is greater than the rated feed amount.
  • the ratio is three percent and less than the fourth percent of the rated feed amount, determine the steam flow rate of the dissolution unit in the next target cycle.
  • the first percentage is less than the second percentage
  • the second percentage is less than the third percentage
  • the third percentage is less than the fourth percentage.
  • the rated feed volume is generally determined by the performance specifications of the dissolution unit.
  • the first percentage, the second percentage, the third percentage and the fourth percentage can all be set according to the actual situation.
  • the first percentage, the second percentage can also be determined based on multiple dissolution experiments. ratio, third percentile, and fourth percentile.
  • the second percentage is less than 100%
  • the third percentage is greater than 100%
  • the absolute value of the difference between the two and 100% is equal.
  • the first percentage may be 75%
  • the second percentage may be 90%
  • the third percentage may be 110%
  • the fourth percentage may be 125%.
  • A1 Obtain the actual dissolution temperature of the dissolution unit within the current target period, and determine the dissolution temperature deviation based on the difference between the actual dissolution temperature and the preset dissolution temperature.
  • the dissolution unit can be provided with n heating sections, and each heating section will collect temperature data m times during the target period, where n and m are both positive integers greater than 1.
  • the second average temperature value can be calculated using the following formula:
  • T(t1)av is the second average temperature value of n heating sections in the current target period t1
  • n is the number of heating sections
  • m is the number of collections.
  • the first average temperature value corresponding to the heating section is discarded, otherwise the third average temperature value corresponding to the heating section is discarded.
  • An average temperature value is retained, so that the difference between the first average temperature value and the second average temperature value corresponding to each heating section is smaller, and the final calculated actual dissolution temperature is more accurate.
  • the preset deviation threshold can be set according to actual requirements. The smaller the preset deviation threshold, the more accurate the final calculated actual dissolution temperature will be.
  • the actual dissolution temperature of the dissolution unit is determined.
  • the average dissolution temperature of the dissolution unit is equal to the above-mentioned second average temperature value.
  • A2 Calculate the grade value of the dissolution temperature deviation using the preset variation range and domain interval for the dissolution temperature deviation.
  • the scaling factor can be calculated using the variation range and domain interval of the dissolution temperature deviation.
  • the scale factor is 3.
  • the series of the domain interval can also be set according to the domain interval of the dissolution temperature deviation, and the difference between two adjacent series of the domain interval can be used as the domain interval factor.
  • the domain interval series can be set to 5, at which time the domain interval becomes ⁇ -2,-1,0,1,2 ⁇ , then according to the difference between two adjacent series in the domain interval, it can be determined that the domain interval factor is 1.
  • the level value of the dissolution temperature deviation can also be limited. In some embodiments, when the level value of the dissolution temperature deviation is greater than the upper limit of the domain of discussion, the upper limit of the domain of discussion is regarded as The grade value of the dissolution temperature deviation.
  • the grade value of the dissolution temperature deviation is less than the lower limit of the universe of discussion, the lower limit of the universe of discourse is used as the grade value of the dissolution temperature deviation.
  • the grade value of the dissolution temperature deviation is within the universe of discussion, the grade value of the dissolution temperature deviation is rounded.
  • A3 Based on the difference between the dissolution temperature deviation in the previous target period and the dissolution temperature deviation in the current target period, determine the dissolution temperature deviation change rate, and use the preset change range and theory for the dissolution temperature deviation change rate. domain interval, and calculate the grade value of the dissolution temperature deviation change rate.
  • T(t1)evc is the current target period t1
  • T(t1)evc is the current target period t1
  • T(t1-1)ev is the dissolution temperature deviation in the previous target period t1-1.
  • the ratio factor can be calculated using the variation range of the dissolution temperature deviation change rate and the domain of discourse interval.
  • the ratio factor can be calculated by using the ratio of the upper limit of the range of the dissolution temperature deviation change rate to the upper limit of the universe of discussion.
  • the ratio factor is 0.5.
  • the value of the dissolution temperature deviation change rate can also be processed.
  • the dissolution temperature deviation change rate when the dissolution temperature deviation change rate is less than the lower limit of the dissolution temperature deviation change rate, the dissolution temperature deviation change rate will be The lower limit of the change range is taken as the dissolution temperature deviation change rate; when the dissolution temperature deviation change rate is greater than the upper limit of the change range of the dissolution temperature deviation change rate, the upper limit of the change range of the dissolution temperature deviation change rate is taken as Dissolution temperature deviation change rate; when the dissolution temperature deviation change rate is within the change range of the dissolution temperature deviation change rate, the dissolution temperature deviation change rate will not be processed.
  • T(t1)Evc is the value within the current target period t1
  • the grade value of the dissolution temperature deviation change rate, T(t1)evc is the dissolution temperature deviation change rate within the current target period t1
  • k3 is the ratio factor.
  • the range of the grade value of the dissolution temperature deviation change rate can also be limited.
  • the domain of the dissolution temperature deviation change rate When the grade value of the dissolution temperature deviation change rate is greater than the upper limit of the domain interval of the dissolution temperature deviation change rate, the domain of the dissolution temperature deviation change rate will be The upper limit of the interval is used as the grade value of the dissolution temperature deviation change rate.
  • the grade value of the dissolution temperature deviation change rate is less than the lower limit of the universe interval of the dissolution temperature deviation change rate, the lower limit of the universe interval of the dissolution temperature deviation change rate is used as the grade value of the dissolution temperature deviation change rate. ;
  • the grade value of the dissolution temperature deviation change rate is within the universe of discussion of the dissolution temperature deviation change rate, round the grade value of the dissolution temperature deviation change rate.
  • the fluctuation range of the grade value and change rate is reduced, thereby avoiding the calculation of the next target period
  • the steam flow rate in the system fluctuates too much, causing the dissolution temperature to fluctuate too much.
  • the steam flow rate in the next target period can be calculated based on the adjustment interval of the steam valve of the dissolution unit, the level value of the dissolution temperature deviation, and the level value of the dissolution temperature deviation change rate.
  • the upper limit of the adjustment interval, T(t1)Ev is the level value of the dissolution temperature deviation in the current target period t1
  • T(t1)Evc is the level value of the dissolution temperature deviation change rate in the current target period t1
  • y is the upper limit of the domain interval of the dissolution temperature deviation, and b is the upper limit of the domain interval of the dissolution temperature deviation change rate.
  • Step S103 Control the actual steam flow rate of the dissolution unit in the next target period based on the steam flow rate, so that the dissolution temperature in the next target period is within the preset range.
  • the opening of the steam valve can be controlled based on the steam flow rate in the next target period, thereby changing the actual steam flow rate of the dissolution unit in the next target period, and thereby changing the actual dissolution temperature of the dissolution unit in the next target period.
  • the target of the dissolution unit in the next target cycle is determined.
  • Feed volume based on the target feed volume, controls the actual feed volume of the dissolution unit in the next target cycle.
  • the target feed amount in the next target period can be calculated based on the adjustment interval of the feed amount of the dissolution unit, the grade value of the dissolution temperature deviation, and the grade value of the dissolution temperature deviation change rate.
  • T(t1)Ev is the level value of the dissolution temperature deviation in the current target period t1.
  • T(t1)Evc is the dissolution temperature deviation change in the current target period t1.
  • the grade value of the rate, y is the upper limit of the domain interval of the dissolution temperature deviation, and b is the upper limit of the domain interval of the dissolution temperature deviation change rate.
  • an alarm message is issued to allow the operator to take manual control.
  • a dissolution temperature control device which can be applied to a dissolution unit.
  • the device includes:
  • the data acquisition unit 201 is used to obtain the feed flow rate of the dissolution unit, and determine the actual feed amount of the dissolution slurry of the dissolution unit within the current target period based on the feed flow rate.
  • the data processing unit 202 is configured to detect that the actual feed amount is greater than the first percentage of the rated feed amount and less than the second percentage of the rated feed amount, or when it is detected that the actual feed amount is greater than the rated feed amount.
  • the third percentage of the material amount is less than the fourth percentage of the rated feed amount, it is determined that the dissolution unit is The steam flow rate within a target period, wherein the first percentage is less than the second percentage, the second percentage is less than the third percentage, and the third percentage is less than the fourth percentage.
  • the control unit 203 is used to control the actual steam flow rate of the dissolution unit in the next target period based on the steam flow rate, so that the dissolution temperature in the next target period is within a preset range.
  • the data processing unit 202 is also configured to: when detecting that the actual feed amount is greater than the second percentage of the rated feed amount and less than the third percentage of the rated feed amount, Determine the target feed volume of the dissolution unit in the next target cycle.
  • control unit 203 is also used to: control the actual feed amount of the dissolution unit in the next target cycle based on the target feed amount.
  • the dissolution temperature control device also includes: a temperature deviation evaluation unit 204, used to obtain the actual dissolution temperature of the dissolution unit within the current target period, and calculate the actual dissolution temperature based on the actual dissolution temperature and the preset dissolution temperature. Difference, determine the dissolution temperature deviation; use the preset change range and domain interval for the dissolution temperature deviation, calculate the level value of the dissolution temperature deviation; based on the dissolution temperature deviation in the previous target period and the current target The difference in the dissolution temperature deviation amount within the period is used to determine the dissolution temperature deviation change rate, and the grade value of the dissolution temperature deviation change rate is calculated using the change range and domain interval preset for the dissolution temperature deviation change rate.
  • a temperature deviation evaluation unit 204 used to obtain the actual dissolution temperature of the dissolution unit within the current target period, and calculate the actual dissolution temperature based on the actual dissolution temperature and the preset dissolution temperature. Difference, determine the dissolution temperature deviation; use the preset change range and domain interval for the dissolution temperature deviation, calculate the level value of the dissolution
  • the data processing unit 202 is also used to calculate the next target based on the adjustment interval of the steam valve of the dissolution unit, the grade value of the dissolution temperature deviation, and the grade value of the dissolution temperature deviation change rate.
  • the dissolution unit is provided with n heating sections, and each heating section collects temperature data m times during the target period.
  • the temperature deviation evaluation unit 204 is also used to: obtain m times of temperature data for each heating section. The first average temperature value of the temperature data collected, and the second average temperature value of the temperature data collected m times for n heating sections, where n and m are both positive integers greater than 1; for each heating section, if the corresponding The difference between the first average temperature value and the second average temperature value is greater than the preset deviation threshold, then the first average temperature value corresponding to the heating section is discarded; based on the first average temperature value corresponding to the retained heating section, determine The actual dissolution temperature of the dissolution unit.
  • the data processing unit 202 is also configured to: detect that the actual feed amount is less than the first percentage of the rated feed amount, or detect that the actual feed amount is greater than the rated feed amount. At the fourth percentile, an alarm message is issued.
  • the dissolution temperature control device introduced in this embodiment is an electronic device used to implement the dissolution temperature control method in the embodiment of the disclosure, based on the dissolution temperature control method introduced in the embodiment of the disclosure, those skilled in the art can To understand the implementation of the electronic device of this embodiment and its various modifications, how the electronic device implements the method in the disclosed embodiment will not be described in detail here. As long as those skilled in the art implement the dissolution temperature control method in the embodiments of the present disclosure, the electronic equipment used will fall within the scope of protection of the present disclosure.
  • an embodiment of the present disclosure provides a dissolution temperature control device, which can be applied to a dissolution unit.
  • the dissolution temperature control device provided by the embodiment of the present disclosure includes: a memory 301, a processor 302, and code stored in the memory and executable on the processor 302.
  • the processor 302 implements the foregoing when executing the code. Any embodiment of the dissolution temperature control method.
  • bus 300 can include any number of interconnected buses and bridges, the bus 300 will include one or more processors represented by the processor 302 and the memory 301.
  • the various circuits of memory are linked together.
  • Bus 300 may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described herein.
  • Bus interface 305 provides an interface between bus 300 and receiver 303 and transmitter 304.
  • the receiver 303 and the transmitter 304 may be the same element, a transceiver, providing a unit for communicating with various other devices over a transmission medium.
  • the processor 302 is responsible for managing the bus 300 and general processing, while the memory 301 may be used to store data used by the processor 302 in performing operations.
  • a computer-readable storage medium 400 is provided, with a computer program 401 stored thereon, and the computer program 401 is When the processor is executed, any one of the foregoing dissolution temperature control methods is implemented.
  • the actual feed amount of the dissolution slurry of the dissolution unit is determined, and then the first time it is detected that the actual feed amount is greater than the rated feed amount percentage and less than the second percentage of the rated feed amount, or when it is detected that the actual feed amount is greater than the third percentage of the rated feed amount and less than the fourth percentage of the rated feed amount, Based on the adjustment range of the steam valve of the dissolution unit, the level value of the dissolution temperature deviation, and the level value of the dissolution temperature deviation change rate, determine the steam flow rate of the dissolution unit in the next target period.
  • the dissolution temperature control method provided by the embodiments of the present disclosure has the technical effects of simple control, automatic control of the dissolution temperature, and small fluctuation range of the dissolution temperature.
  • the grade value of the dissolution temperature deviation, and the grade value of the dissolution temperature deviation change rate calculate the target feed amount in the next target period, and control the dissolution based on the target feed amount
  • the actual feed amount of the unit in the next target period also makes the dissolution temperature in the next target period within the preset range, thereby effectively reducing the fluctuation of the dissolution temperature.
  • One or more technical solutions provided in the embodiments of the present disclosure have at least the following technical effects or advantages: first, obtain the feed flow rate of the dissolution unit, and determine the dissolution slurry of the dissolution unit based on the feed flow rate within the current target period.
  • the actual feed amount can be detected when the actual feed amount is greater than the first percentage of the rated feed amount and less than the second percentage of the rated feed amount, or when the actual feed amount is detected.
  • the adjustment interval of the steam valve of the dissolution unit, the grade value of the dissolution temperature deviation, and the dissolution temperature deviation are The grade value of the change rate determines the steam flow rate of the dissolution unit in the next target period.
  • the actual steam flow rate of the dissolution unit in the next target period is controlled so that the dissolution temperature in the next target period is within the preset range. within, thus making the dissolution temperature fluctuation smaller.
  • embodiments of the present disclosure may be provided as methods, systems, or computer products. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present disclosure may take the form of a computer product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means, the instruction means Implements the functionality specified in a process or processes in a flow diagram and/or in a block or blocks in a block diagram.
  • These computer instructions may also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on the computer or other programmable device to produce computer-implemented processes, thereby causing the instructions to execute on the computer or other programmable device
  • steps for implementing the functionality specified in a process or processes in a flow diagram and/or in a block or blocks in a block diagram are also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on the computer or other programmable device to produce computer-implemented processes, thereby causing the instructions to execute on the computer or other programmable device.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Feedback Control In General (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'invention concerne un procédé et un appareil de commande de température de dissolution, un dispositif, et un support de stockage. Le procédé de commande consiste à : déterminer une quantité d'alimentation réelle de boue dissoute d'une unité de dissolution sur la base d'un débit d'alimentation au sein d'une période cible actuelle (S101) ; lorsqu'il est détecté que la quantité d'alimentation réelle est supérieure à un premier pourcentage d'une quantité d'alimentation nominale et inférieure à un deuxième pourcentage de la quantité d'alimentation nominale, ou lorsqu'il est détecté que la quantité d'alimentation réelle est supérieure à un troisième pourcentage de la quantité d'alimentation nominale et inférieure à un quatrième pourcentage de la quantité d'alimentation nominale, déterminer un débit de vapeur de l'unité de dissolution au sein d'une période cible suivante (S102) ; et ensuite, commander un débit de vapeur réel de l'unité de dissolution au sein de la période cible suivante sur la base du débit de vapeur, de sorte que la température de dissolution au sein de la période cible suivante se situe au sein d'une plage prédéfinie (S103). Le procédé de commande réduit efficacement la fluctuation de la température de dissolution.
PCT/CN2023/089987 2022-07-25 2023-04-23 Procédé et appareil de commande de température de dissolution, dispositif, et support de stockage WO2024021704A1 (fr)

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CN117826903B (zh) * 2024-03-05 2024-05-28 潍坊奥博仪表科技发展有限公司 基于智控阀的温差控制方法

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