KR20010064013A - Parallel unity control system of blast furnace - Google Patents

Abstract

PURPOSE: A parallel integration control system for a blast furnace is provided to prevent operation stoppage or obstruction due to the breakdown of controllers by removing the reciprocal interference between the controllers for compatibility taking into account of selection, installation, construction and operation of controllers of a blast furnace. CONSTITUTION: In a parallel integration control system for a blast furnace controlling facilities of the blast furnace in which raw materials are weighed, transferred, fed, charged and blast furnace, the system comprises a plurality of electrically controlled PLC (Programmable Logic Controllers) (13) controlling each facilities in the location where the facilities of the blast furnace are installed; a plurality of E-MMI (Electricity-Man Machine Interface) (11) each of which are connected to the plurality of electrically controlled PLC for interfacing controllers and operators; a plurality of instrumentation control DCS (Direct Control Systems) (14) feedback controlling operation of the facilities of the blast furnace; a plurality of I-MMI (Instrument-Man Machine Interface) (12) each of which are connected to the plurality of instrumentation control DCS for interfacing the controllers and the operators; a hub (17) switching the communication passage of the plurality of electrically controlled PLC and instrumentation control DCS; and an integration MMI (10) interfacing the operators so that the plurality of electrically controlled PLC and instrumentation control DCS are controlled and managed through the hub.

Description

PARALLEL UNITY CONTROL SYSTEM OF BLAST FURNACE

The present invention relates to a control system for controlling blast furnace equipment, and more particularly, to eliminate interoperation between controllers in consideration of the selection, installation, configuration, and operability of the furnace controller and to be compatible to prevent operation breakdown or failure due to controller failure. A parallel integrated control system of the blast furnace is prevented.

In general, the blast furnace equipment of the steel mill, as shown in Figure 1, in addition to the blast furnace for melting and discharging steel, and a basis weight device (not shown) for weighing each of a predetermined amount of fuel and raw materials, and the fuel weighted by the basis weight device, or A relay tank 81 for temporarily storing raw materials and discharging them under control, a charging belt 82 for transporting fuel or raw materials discharged from the relay tank 81 to the top, and transported by the charging belt 82. Import guide device (83) for guiding the fuel or raw material into one of the two hoppers, First and second top hoppers (84,85) for storing the fuel and raw material installed on the top of the furnace, and the location of the in-charge contents A positional distribution device 86 for adjusting the distribution, and a circumferential distribution device 87 which rotates to properly distribute the fuel or raw material discharged from the first and second hoppers 84 and 85 for each circumference in the furnace; Level indicator for detecting the level of charge in the furnace A device 88 is provided, and a plurality of control valves are installed to control the basis weight, transportation, import and charging of the devices, and a plurality of detectors BD1 to BD3 for detecting the control gate and the operating state. do.

And, as shown in Figure 1, the control system for controlling the blast furnace facility, the electric control means of the field equipment 19, such as a power connection device (MCC) or relay (RELAY), the input and output device (I / O) The programmable controller (13) controls a number of electric control PLCs (13) and feedback the detected value of the site and compares it with the set value to control the feedback by controlling the pressure, flow rate, temperature, speed, etc. A plurality of Direct Control System (DCS) 14 for direct operation and a plurality of Electrical Control Communicaters for interfacing each electrical control signal to be applied to or to be applied to the plurality of electrical control PLCs 13. A plurality of Instrument Control Communicaters (hereinafter referred to as ICCs) for interfacing control signals applied to or to be applied to / from the plurality of Instrument Control DCS 14). 21, a plurality of mimic panels 22 connected to the ECC 20 for the operator to monitor the operation of each facility, and electrical control signals or instrumentation control via the ECC 20 and the ICC 21. A central processing computer 24 for applying a signal or storing or outputting the collected data is connected. In addition, a FDDI (Fiber Distributed Data Interface) network 23, which is a LAN in a steel mill, is connected to the present control system.

As an example of a conventional control system configured as described above, a control system for a blast furnace is shown in detail in FIG. 2. 216 is connected to one ECC 231, and a plurality of instrumentation control DCSs 221 to 224, which are hot stove control, route control, furnace control and spare use, are connected to one ICC 241. The ECC 231 and the ICC 241 are connected online with the terminal 271 and the printer 172 of the central cab, the terminal 274 installed outside the cab, and the computer 275 of each laboratory or development room, respectively. The central computer 250 and the AI computer 260 are connected.

However, such a conventional blast furnace control system is composed of a series of centralized control system connected in series from the upper top controller to the electric control PLC and instrumentation control DCS on the field side, so that the vulnerable environment of the furnace equipment, that is, gas, dust When the ICC or ECC has failed due to vibration, aging of the controller, or internal board defect, the operation of the entire electrical control PLC or the total instrument control DCS is stopped, and thus the control of the furnace equipment is not performed. However, there is a problem in that the field equipment should be shut down during the recovery period.

In addition, the conventional control system is provided with a mimic panel to facilitate the monitoring of the operator in the central cab, but since the mimic panel must be installed for each unit, the installation area is large, such a mimic panel and various field monitoring Since the camera is installed in the cab, the cab environment becomes more complicated and there is a problem that a driver must be present.

The present invention has been made to solve the conventional problems as described above, the object thereof is to eliminate the mutual interference between the controllers in consideration of the selection, installation, configuration and operability of the furnace controller, and to make the operation stop due to the controller failure or It is to provide a parallel integrated control system of the blast furnace to prevent the failure.

1 is a block diagram schematically showing a conventional blast furnace control system configuration.

2 is an exemplary view showing a detailed configuration of a conventional blast furnace control system.

Figure 3 is a block diagram schematically showing the configuration of a parallel integrated control system of the blast furnace according to the present invention.

4 is an exemplary view showing a detailed configuration of a parallel integrated control system of the blast furnace according to the present invention.

5 is a flowchart illustrating a switching operation to a preliminary controller when a fault occurs in an electric control PLC in operation in the parallel integrated control system of a blast furnace according to the present invention.

6 (A) and 6 (B) are comparative configurations for explaining single MMI and integrated MMI.

7 is a block diagram for explaining data processing in the integrated MMI.

8 is a process chart showing a general blast furnace equipment.

* Description of the symbols for the main parts of the drawings *

10: Integrated MMI (Man Machine Interface)

11: E-MMI (Electricity-MMI)

12: I-MMI (Instrument-MMI)

13: Electric Control PLC (Programmable Logic Controller)

14 Instrument Control DCS 15 Switcher

16: wide screen 17: hub

23: FDDI network 24: Central processing computer

As a constituent means for achieving the above object of the present invention, the parallel integrated control system of the blast furnace according to the present invention, in order to control the blast furnace equipment, such as the basis weight of the raw material, transport, import, charging and blast furnace work,

A plurality of electric control PLCs for controlling each facility at the site where the blast furnace facility is installed,

A plurality of E-MMIs connected to the plurality of electrical control PLCs to interface controllers and operators;

A plurality of instrumentation control DCS for controlling feedback of the operation of the blast furnace facility;

An I-MMI (Iinstrument-Man Machine Interface) connected to each of the plurality of instrumentation control DCSs to interface a controller and an operator;

A hub for switching a communication path between the plurality of electrical control PLCs and the instrumentation control DCS;

An integrated MMI (MMI) for interfacing with the operator to control and manage the plurality of electrical control PLC and the instrumentation control DCS through the hub.

Hereinafter, with reference to the accompanying drawings will be described the configuration and operation of the control system according to the present invention.

Figure 3 is a block diagram showing a schematic configuration of a parallel integrated control system of the blast furnace according to the present invention, the parallel integrated control system according to the present invention is a plurality of electric control PLC 13 for controlling the power of the equipment of the field, respectively It is connected to the E-MMI (Electricity-Man Machine Interface) and at the same time, it is also connected to the hub (17), the plurality of instrumentation control DCS (14) are each I-MMI (Iinstrument-Man Machine Interfaces 12 and at the same time also to a hub 17, which connects each of the plurality of electrical control PLCs 13 and instrumentation control DCS 14 to the FDDI network 24 of the steel mill. And the central memory network 24, as well as to the integrated MMI (MMI) 10, the plurality of E-M11 and the I-M12 (12) is a switcher (switcher) It is configured to connect to a predetermined number of large screen 16 through 15).

E-MMI 11 and I-MMI 12, which are connected to a plurality of electrical control PLCs 13 and instrumentation control PLCs 14, respectively, are stand-alone MMIs, as shown in FIG. Each MMI (MAN MACHINE INTERFACE) 62a to 62c is independently connected to one process control system 61a to 61c, and only one data of the corresponding process control system can be queried from one MMI.

However, the integrated MMI 10 connected to the plurality of electrical control PLC 13 and the instrumentation control PLC 14 through the hub 17 is a plurality of process control system (PCS) ( 63a to 63c) and multiple MMIs 64a to 64c are connected in an N: N manner, and data of any process control system can be inquired. In FIG. 6B, all three MMIs 64a to 64c may query and manage three process control systems PCS1 to PCS3 63a to 63c.

In addition, the integrated MMI 10 is configured and operated as shown in FIG. 7, for example, when a user calls a specific screen in an integrated MMI 71, receiving data to be output on the called screen. In order to determine the process control system (PCS) that provides the necessary data for the screen called by the screen editing program (71a), and sends a call command to the process control system (PCS) through the transmission program (71c). At this time, if there is more than one corresponding process control system (PCS), it is performed sequentially in the set order.

The receiving program 74a of the corresponding process control system (PCS) 74 receives the call command transmitted from the MMI 71 to the screen editing program 74b of the PCS, and edits the screen of the PCS. The program 74b determines necessary data with the transferred call command, communicates it with the control program 74c of the PCS, reads the data, and transmits it to the corresponding MMI 71 through the transmission program 74d.

As described above, the data transmitted from the corresponding process control system is received by the internal receiving program 71d of the MMI 71 and stored in the area allocated to the process control system in the database 71c.

The screen editing program 71b reads the data stored in the database 71c and outputs it to the screen.

In the above, an embodiment of the parallel integrated control system of the blast furnace according to the present invention is shown in detail in FIG.

A plurality of electrical control PLCs (411 ~ 415), which are equipped at the site and electrically control the top loading device, the raw material weighing device, and the resin / pillar device, respectively, have a number of E-MMIs (431 ~) that can be inquired by the operator. 433, and is connected to the first hub 451 through a separate communication line.

In addition, a number of instrument control DCS 421 to 427 that feedback control each facility such as the blast furnace body, the top, the hot stove, the columnar, and the AUX also have a large number of I-MMIs 441 to 443 that the operator can query the operation status. While connected in common to, it is also connected to the second hub 452 through a separate communication line.

The first and second hubs 451 and 452 to which the plurality of electrical control PLCs 411 to 415 and the plurality of instrument control DCSs 421 to 427 are connected are connected to an MMI provided in the cab (column and center). In addition, each operation status can be inquired and controlled from the cab rather than the site.

In addition, one of the plurality of I-MMI (431 ~ 433) and E-MMI (441 ~ 443) E-MMI (433) and I-MMI (441) through the switcher 461 to adjust the path of the two It is connected to the large screen (471,472), the output screen can be displayed on the large screen (471,472), the switcher 461 is connected to the CCTV controller connected to the I-TV via another matrix switch. Therefore, the monitoring screen can be displayed on the large screens 471 and 472.

The first and second hubs 451 and 452 are connected to the first and second control upper computers 481 and 482, the data management computer 483, the AI computer 484 and the FDDI network 490 constructed at the steel mill. And relays control signals and data exchange between the computers 481 to 484 and the FDDI network 490 and the plurality of electric control PLCs 411 to 415 and the instrumentation control DCS 421 to 427 provided in the field. .

In the above, a method of switching between the spare electric control PLC 415 and the electric control PLCs 411 to 415 in operation, referring to the operation flow of FIG. 5, may be performed using the integrated MMI 501 or the standalone E-MMI 11. The control signal from the controller is transmitted to the corresponding electric control PLC 13 through the communication interface, and the control operation of the PLC is performed (501 to 503). At this time, if a fault occurs, all of these states are the integrated MMI. It is transmitted to 501 or the standalone E-MMI 11, and an operator can confirm. As a result, it is determined whether the fault signal is a fault signal or a simple error signal (506). In the case of a serious fault, the electric control PLC is turned off and switched to a spare (507,508). On the contrary, in the case of a simple error, after turning on the spare device (509), and after the error is processed, the spare device can be switched back to the corresponding electric control PLC (510) to prevent the shutdown.

In the device according to the present invention, an integrated MMI 501, such as the MMI 500, such as the column cab or the central cab, by the communication interface 503, and an E-MMI (e.g., connected to each electric control PLC 411-414). Single MMI 502 such as 431 to 433 share information with each other, and input each operation command to the corresponding electric control PLC 411 to 414, or manage the output state of the electric control PLC 411 to 414. Accordingly, the electrical control PLCs 411 to 414 perform the input command (504).

At this time, when a fault occurs

As described above, the present invention can control each electric control PLC or instrumentation control DCS alone or in combination, thereby reducing operational breakdown due to system failure, and controlling electric field facilities. PLC and instrumentation control DCS are installed in parallel system, so it is easy to switch to the preliminary controller in case of failure of the controller during use, and it is also possible to replace the Mimic panel, which is required for each unit, with a small number of large screens. By displaying images of surveillance cameras of various field facilities on the large screen, it is much easier to monitor the control state and the state of the facility, and the field facility detection effect is improved in time series.

Claims (2)

In the parallel integrated control system of the blast furnace to control the blast furnace equipment, such as the basis weight of the raw material, transport, import, charging and blast furnace work, A plurality of electric control PLCs for controlling each facility at the site where the blast furnace facility is installed, A plurality of E-MMIs connected to the plurality of electrical control PLCs to interface controllers and operators; A plurality of instrumentation control DCS for controlling feedback of the operation of the blast furnace facility; An I-MMI (Iinstrument-Man Machine Interface) connected to each of the plurality of instrumentation control DCSs to interface a controller and an operator; A hub for switching a communication path between the plurality of electrical control PLCs and the instrumentation control DCS; And an integrated MMI for interfacing with an operator to control and manage the plurality of electrical control PLCs and instrumentation control DCS through the hub. The system of claim 1, wherein the parallel integrated control system of the blast furnace is One or more large screens that display the results and control situations of the site; And a switcher for selectively connecting the plurality of E-M I and I-M I to the large screen.