EP3354372B1 - Système de refroidissement, installation métallurgique et procédé de fonctionnement d'un système de refroidissement - Google Patents

Système de refroidissement, installation métallurgique et procédé de fonctionnement d'un système de refroidissement Download PDF

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Publication number
EP3354372B1
EP3354372B1 EP18150589.2A EP18150589A EP3354372B1 EP 3354372 B1 EP3354372 B1 EP 3354372B1 EP 18150589 A EP18150589 A EP 18150589A EP 3354372 B1 EP3354372 B1 EP 3354372B1
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EP
European Patent Office
Prior art keywords
coolant
pressure
setting
setting means
cooling system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18150589.2A
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German (de)
English (en)
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EP3354372A1 (fr
Inventor
Ralf Peeters
Georg Nowak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Group GmbH
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SMS Group GmbH
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Filing date
Publication date
Application filed by SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP3354372A1 publication Critical patent/EP3354372A1/fr
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Publication of EP3354372B1 publication Critical patent/EP3354372B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
    • B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling

Definitions

  • the invention relates to a cooling system for a metallurgical plant, with which metal products can be acted upon directly with a coolant, comprising at least one dispensing means for directly applying the coolant to a metal product, at least one adjusting means for adjusting a volume flow of the coolant supplied to the dispensing means and at least one pressure increasing means for Supplying the setting agent with the coolant.
  • the invention also relates to a metallurgical plant for manufacturing metal products.
  • the invention also relates to a method for operating a cooling system of a metallurgical plant, the cooling system having at least one delivery means for directly applying a coolant to a metal product, at least one setting means for setting a volume flow of the coolant supplied to the delivery means and at least one pressure increasing means for supplying the setting means the coolant.
  • Metal products are manufactured in metallurgical plants. In some manufacturing steps it is necessary to cool the metal products, in particular in order to be able to adjust their material properties.
  • a metallurgical plant is equipped with a cooling system with which a coolant can be applied directly to metal products.
  • a cooling system usually has to provide different operating parameters, such as a coolant pressure, a coolant volume flow and the like, for a wide variety of metal products via a large number of cooling zones or coolant control systems for variable process engineering, forming and / or metallurgical requirements.
  • a cooling system usually has several cooling zones, each with a controlled system.
  • a cooling system includes one or more spray nozzles for directly applying the coolant to the metal products in order to be able to cool the metal product in accordance with predetermined process parameters. As a rule, the individual cooling zones are operated at partial load.
  • the individual cooling zones are designed as single, dual or multi-fluid cooling systems.
  • single-fluid cooling systems water is used as the coolant.
  • the coolant volume flow or coolant pressure is used as a measure of the coolant supplied to the metal product.
  • dual or multi-fluid cooling systems the metal product is also supplied with water as a coolant via special spray nozzles.
  • additives such as compressed air are added to the water at the spray nozzles.
  • Dual or multi-fuel cooling systems enable more efficient cooling and offer more options for influencing the cooling effect. In this way, smaller amounts of water can also be achieved while maintaining a required spray pattern, that is to say uniform application of the coolant to the metal product.
  • a two-component cooling system it is possible to regulate the cooling effect not only via the amount of water dispensed, but also via the air pressure supplied.
  • a cooling system Since the operation of cooling systems leads to changes in pressure loss, for example due to tolerances, contamination or wear and tear of individual components, a cooling system is usually subjected to safety margins. These safety margins lead to the consumption of additional energy, which is ultimately converted from pressure energy into kinetic energy or thermal energy in the control systems of the cooling zones and is thus lost. This reduces the efficiency of the overall system and increases the wear on the control systems.
  • EP 2 643 109 B1 relates to a secondary cooling device for cooling a metal strand guided in a strand guide device of a continuous casting plant.
  • the secondary cooling device comprises a plurality of cooling zones arranged along the strand guide device; at least one pressure line network through which at least one cooling medium flows; Pointed nozzles for applying the at least one cooling medium from the pressure line network to the metal strand, at least within a cooling zone; at least one pressure measuring device for measuring the actual pressure of the at least one cooling medium in the pressure line network; and at least one actuator for adapting the predetermined cooling output delivered to the metal strand within the cooling zone with the aid of the pressure line network and spray nozzles connected to it.
  • At least one control circuit is provided with at least one control valve as a controller and the at least one actuator and designed as a pressure control circuit in which a setpoint pressure and the actual pressure of the at least one cooling medium in the pressure line network are fed to the control valve for the purpose of pressure control.
  • the control valve is designed as a self-regulating pressure control element.
  • One object of the invention is to provide a more energy-efficient cooling system for a metallurgical plant, the use of which is associated with a reduction in operating costs.
  • a cooling system for a metallurgical plant, with which metal products can be acted upon directly with a coolant, comprises at least one delivery means for directly impinging a metal product with the coolant, at least one setting means for setting a volume flow of the coolant supplied to the delivery means, at least one pressure increasing means for supplying the Setting means with the coolant, at least one evaluation means which is set up, taking into account a coolant pressure between the delivery means and the setting means, an operating state of the setting means, a coolant pressure between the pressure increasing means and the setting means and / or a volume flow-pressure characteristic curve of the delivery means, a coolant pressure setpoint to determine, and at least one control device arranged between the evaluation means and the pressure increasing means for determining a control difference between the coolant pressure llwert (P soll) and the coolant (P), and for controlling the refrigerant pressure (p) between the pressure increasing means (10) and the Setting means to the coolant pressure setpoint (p soll ) by controlling the pressure increasing means as an actuator in accord
  • the setting of the coolant pressure between the pressure increasing means and the setting means is not carried out, as is conventional, independently of the setting of the volume flow of the coolant supplied to the delivery means.
  • the operation of the cooling system according to the invention can be optimized in particular with regard to energy consumption.
  • the evaluation means taking into account the coolant pressure between the delivery means and the setting means, the operating state of the setting means, the coolant pressure between the pressure increasing means and the setting means and / or the volume flow-pressure characteristic of the delivery means, determine how strong the pressure increase of the pressure increasing means in relation to Pressure requirement of the consumer can be lowered, and set a corresponding coolant pressure setpoint.
  • the invention enables a significant reduction in the energy consumption of the cooling system. As a result, the operating costs of the cooling system according to the invention or of a metallurgical plant equipped with it can be reduced.
  • the cooling system according to the invention can be designed as a single, dual or multi-substance cooling system.
  • the metallurgical plant can be a casting plant, a process plant or a forming plant or it can be formed by a combination of at least two of these plant components.
  • the dispensing means can be designed as a spray nozzle with which a desired spray pattern can be generated.
  • the cooling system according to the invention can also have two or more delivery means to which the coolant has a common Adjustment means or adjustment means individually assigned to the individual delivery means can be supplied.
  • the setting means can have a control valve which is designed as a pressure control element. An open state of the control valve can then be detected as the operating state of the setting means and taken into account when determining the coolant pressure setpoint.
  • the setting means can also have control electronics to which, for example, process parameters are supplied from a database in the form of setpoint values. For example, a coolant volume flow target value can be fed to the control electronics as a target value and this can be compared with a detected coolant volume flow actual value in order to be able to regulate the coolant volume flow.
  • the cooling system according to the invention can have separate control electronics or at least one common control electronics for two or more control valves for each control valve.
  • the cooling system according to the invention can have two or more cooling zones, in particular a plurality of cooling zones, each of which has at least one dispensing means for directly applying the coolant to a metal product and at least one setting means for setting a volume flow of the coolant supplied to the dispensing means.
  • the pressure-increasing means can have one or more pumps or compressors. Several pumps or compressors can be combined to form a group.
  • the cooling system according to the invention can also have two or more pressure-increasing means.
  • the evaluation means can have at least one evaluation electronics, for example a microcontroller, and at least one electronic information memory, with the evaluation electronics being able to execute an algorithm that uses the coolant pressure as input variables between the delivery means and the setting means, the operating state of the setting means, the coolant pressure between the pressure increasing means and the setting means and the volume flow-pressure characteristic curve of the delivery means can be supplied and which outputs the coolant pressure setpoint as an output variable.
  • the volume flow / pressure characteristic curve of the dispensing means can be stored in the electronic information memory.
  • the cooling system according to the invention can also have two or more evaluation means.
  • the control device is connected to the evaluation means and the pressure increase means in order to receive the coolant pressure setpoint from the evaluation means and to control the pressure increase means or its drive as an actuator of a control circuit depending on a control difference between the coolant pressure setpoint obtained and the coolant (actual) pressure.
  • the coolant pressure between the pressure increasing means and the setting means can be regulated to the coolant pressure setpoint with the regulating device.
  • the evaluation means is set up to determine the coolant pressure setpoint, taking into account a maximum open state of a control valve of the setting means and operating parameter specifications on the delivery means and / or on the control valve. With a maximum opening state of the control valve, this can be supplied with coolant under a lower coolant pressure, without operating parameter specifications on the delivery means and / or on the control valve not being observed.
  • the wide opening of the control valve and the lower coolant pressure reduce the wear on the control valve. This extends the service life of the control valve, which saves operating costs.
  • wear on the pressure increasing means and the discharge means can also be reduced, which increases their service life and also saves operating costs.
  • a metallurgical plant according to the invention for manufacturing metal products comprises at least one cooling system according to one of the aforementioned configurations or any combination of at least two of these configurations with one another.
  • the advantages mentioned above with regard to the cooling system are correspondingly associated with the metallurgical plant.
  • the metallurgical plant can be designed as a casting plant, process plant or forming plant or it can be formed by at least two of these plant components.
  • the metallurgical plant can have two or more corresponding cooling systems.
  • the cooling system having at least one delivery means for directly applying a coolant to a metal product, at least one adjustment means for adjusting a volume flow of the coolant supplied to the delivery means and at least one pressure increase means for supplying the adjustment means with the coolant has, taking into account a coolant pressure between the delivery means and the setting means, an operating state of the setting means, a coolant pressure between the pressure increasing means and the setting means and / or a volume flow-pressure characteristic curve of the delivery means, a coolant pressure setpoint is determined and the coolant pressure between the Pressure increasing means and the adjusting means regulated to the coolant pressure setpoint.
  • cooling system according to one of the above-mentioned configurations or any combination of at least two of these configurations with one another can be used to carry out the method.
  • the coolant pressure setpoint is determined taking into account a maximum opening state of a control valve of the setting means and operating parameter specifications on the delivery means and / or on the control valve.
  • Figure 1 shows a schematic representation of an exemplary embodiment of a cooling system 1 according to the invention for a metallurgical plant, with which metal products 2 can be acted upon directly with a coolant 3.
  • the cooling system 1 comprises three delivery means 4 for the direct application of the coolant 3 to a metal product 2.
  • Each delivery means 4 is an adjustment means assigned, with which a volume flow of the coolant 3 supplied to the respective delivery means 4 can be adjusted or regulated.
  • each adjustment means comprises a control valve 5, a the control valve 5 associated actuating means 6, an the control valve 5 upstream flow detecting means 7 and the adjusting common control electronics 8.
  • Each volume current sensing means 7 takes the electronic control system 8 to the respectivedeffenstoffvolumenstromistwert V istnx with the value 1, 2 or 3 for x to.
  • the control electronics 8 are supplied with coolant volume flow setpoints V soll from a database 9.
  • each cooling zone n1, n2 and n3 thus comprises a controlled system made up of the aforementioned components.
  • the cooling system 1 also includes a pressure increase means 10 for supplying the setting means with the coolant 3.
  • the pressure increase means 10 includes a pump 11 and a drive 12 that drives it.
  • the pressure increase means 10 is assigned its own control device, in which a coolant pressure p is by means of a pressure detection means 13 is detected between the pressure increasing means 10 and the setting means and fed to an electronic control system 14.
  • the cooling system 1 comprises an evaluation means 15 which is set up, taking into account coolant pressures p istnx between the respective delivery means 4 and the respective setting means or the control valve 5 of the respective setting means, an operating state of the respective setting means in the form of a percent value with respect to a state of opening of the control valve 5 of the respective setting means, the refrigerant pressure p is p to determine a refrigerant pressure set value between the pressure increasing means 10 and the adjusting means and / or a volume flow-pressure characteristic curve 17 of the respective dispensing means. 4
  • control device for adjusting the refrigerant pressure p is arranged between the pressure increasing means 10 and the adjusting means.
  • the control system comprises pressure sensing means 13 and the control electronics 14.
  • the control means is adapted to control the pressure increasing means 10 in accordance with a control difference between the refrigerant pressure setpoint P set and thedeffenbuchistwert P is for controlling the refrigerant pressure p between the pressure increasing means 10 and the adjusting means to the coolant pressure setpoint p should .
  • the evaluation means 15 may be configured to p coolant pressure setpoint in consideration of a maximum opening condition of the control valve 5 to determine the respective adjusting operating parameters and specifications on the respective dispensing means 4 and / or on the respective control valve. 5

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (5)

  1. Système de refroidissement (1) destiné à une installation sidérurgique, avec lequel on peut solliciter des produits métalliques (2) de manière directe avec un moyen de refroidissement (3), qui présente :
    - au moins un moyen de distribution (4) destiné à la sollicitation directe d'un produit métallique (2) avec le moyen de refroidissement (3) ;
    - au moins un moyen de réglage destiné au réglage d'un débit volumique du moyen de refroidissement (3) acheminé au moyen de distribution (4) ;
    - au moins un moyen d'augmentation de la pression (10) destiné à l'alimentation du moyen de réglage avec le moyen de refroidissement (3) ;
    - au moins un moyen d'enregistrement de la pression (16) destiné à l'enregistrement d'une pression du moyen de refroidissement (pistnx) entre le moyen de distribution (4) et le moyen de réglage ;
    - au moins un moyen d'enregistrement de la pression (13) destiné à l'enregistrement d'une pression du moyen de refroidissement (pist) entre le moyen d'augmentation de la pression (10) et le moyen de réglage ; et
    - au moins un moyen d'enregistrement du débit volumique (7) destiné à l'enregistrement d'une valeur réelle du débit volumique du moyen de refroidissement (Vistnx) ;
    caractérisé par
    - au moins un moyen d'évaluation (15) qui est conçu pour déterminer, en se référant à la pression enregistrée du moyen de refroidissement (pistnx) entre le moyen de distribution (4) et le moyen de réglage, à l'état de fonctionnement enregistré du moyen de réglage, à la pression enregistrée du moyen de refroidissement (pist) entre le moyen d'augmentation de la pression (10) et le moyen de réglage et/ou à une courbe caractéristique (17) du moyen de distribution (4) qui reproduit le débit volumique par rapport à la pression, une valeur de consigne de la pression du moyen de refroidissement (psoll) ; et
    - au moins un dispositif de régulation qui est disposé entre le moyen d'évaluation (15) et le moyen d'augmentation de la pression (10), destiné à déterminer une différence de régulation entre la valeur de consigne de la pression du moyen de refroidissement (Psoll) et la pression du moyen de refroidissement (Pist) et destiné au réglage de la pression du moyen de refroidissement (pist) entre le moyen d'augmentation de la pression (10) et le moyen de réglage, à la valeur de consigne de la pression du moyen de refroidissement (psoll) par l'intermédiaire de la commande du moyen d'augmentation de la pression à titre d'organe de commande, en fonction de la différence de régulation.
  2. Système de refroidissement (1) selon la revendication 1, caractérisé en ce que le moyen d'évaluation (15) est conçu pour déterminer la valeur de consigne de la pression du moyen de refroidissement (psoll) en prenant en compte un état d'ouverture maximale d'une soupape de réglage (5) du moyen de réglage, ainsi que des spécifications de paramètres d'exploitation en ce qui concerne le moyen de distribution (4) et/ou en ce qui concerne la soupape de réglage (5).
  3. Installation sidérurgique destinée à la fabrication de produits métalliques (2), caractérisée par au moins un système de refroidissement (1) selon la revendication 1 ou 2.
  4. Procédé destiné à l'exploitation d'un système de refroidissement (1) d'une installation sidérurgique, dans lequel le système de refroidissement (1) présente au moins un moyen de distribution (4) destiné à la sollicitation directe d'un produit métallique (2) avec un moyen de refroidissement (3), au moins un moyen de réglage destiné au réglage d'un débit volumique du moyen de refroidissement (3) acheminé au moyen de distribution (4), et au moins un moyen d'augmentation de la pression (10) destiné à l'alimentation du moyen de réglage avec le moyen de refroidissement (3) ;
    caractérisé
    - en ce que, en se référant à une pression du moyen de refroidissement (pistnx) entre le moyen de distribution (4) et le moyen de réglage, à un état de fonctionnement du moyen de réglage, à une pression du moyen de refroidissement (pist) entre le moyen d'augmentation de la pression (10) et le moyen de réglage et/ou à une courbe caractéristique (17) du moyen de distribution (4) qui reproduit le débit volumique par rapport à la pression, on détermine une valeur de consigne de la pression du moyen de refroidissement (psoll) ;
    - en ce que l'on détermine la pression du moyen de refroidissement (Pist) en vigueur entre le moyen d'augmentation de la pression (10) et le moyen de réglage ;
    - en ce que l'on détermine une différence de régulation entre la valeur de consigne de la pression du moyen de refroidissement (psoll) et la pression du moyen de refroidissement (Pist) ;
    et
    - en ce que l'on rèégule la pression du moyen de refroidissement (Pist) à la valeur de consigne de la pression du moyen de refroidissement (psoll) par l'intermédiaire d'une commande du moyen d'augmentation de la pression à titre d'organe de commande, en fonction de la différence de régulation.
  5. Procédé selon la revendication 4, caractérisé en ce que l'on détermine la valeur de consigne de la pression du moyen de refroidissement (psoll) en se référant à un état d'ouverture maximale d'une soupape de régulation (5) du moyen de réglage, ainsi qu'à des spécifications de paramètres d'exploitation en ce qui concerne le moyen de distribution (4) et/ou en ce qui concerne la soupape de régulation (5).
EP18150589.2A 2017-01-25 2018-01-08 Système de refroidissement, installation métallurgique et procédé de fonctionnement d'un système de refroidissement Active EP3354372B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017201128.9A DE102017201128A1 (de) 2017-01-25 2017-01-25 Kühlsystem, hüttentechnische Anlage und Verfahren zum Betreiben eines Kühlsystems

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EP3354372A1 EP3354372A1 (fr) 2018-08-01
EP3354372B1 true EP3354372B1 (fr) 2020-12-16

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DE (1) DE102017201128A1 (fr)

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CN111531144B (zh) * 2020-05-15 2021-07-23 河钢乐亭钢铁有限公司 一种超宽流量及拉速变化范围的连铸喷嘴水流量控制方法

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Publication number Priority date Publication date Assignee Title
JPS57139460A (en) * 1981-02-20 1982-08-28 Kawasaki Steel Corp Control method for secondary cooling water in continuous casting installation
JPS57206559A (en) * 1981-06-16 1982-12-17 Fuji Electric Co Ltd Control method for flow rate of secondary cooling water of continuous casting installation
DE102010052247A1 (de) * 2010-11-23 2012-05-24 Sms Siemag Ag Vorrichtung und Verfahren zur geregelten Sekundärkühlung einer Stranggießanlage
EP2583772B1 (fr) * 2010-05-19 2015-10-21 SMS group GmbH Dispositif de guidage de barre

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Title
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EP3354372A1 (fr) 2018-08-01

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