Introduce to you: the application case of research and development of industrial computer in the automatic control system of 900 cubic meters of blast furnace.
The 900m3 blast furnace automation control system mainly includes three aspects: electric control of hot blast furnace, furnace body instrument control, and electric control of material feeding under the tank top. In 2005, the original DCS was fully upgraded to PLC.
1. System requirements:
The operating system is WINDOWS2000+SP4, and the application platform is 3 sets of CONTROLLOGIX control software from American ROCKWELL Company. 100MB/S Ethernet communication mode is adopted between the three subsystems, and three communication protocols are adopted between the host computer and PLC: DEVICENET, CONTROLNET, and ETHERNET. The equipment has strong anti-electromagnetic interference ability, good scalability, good durability, and convenient escort application.
Two system achievements:
Real-time collection and processing of data of blast furnace and hot blast stove body pressure, differential pressure, flow rate, liquid level, temperature, weight, and valve position, and historical data processing. Automatic adjustment and control of parameters such as furnace top pressure, airtight box pressure, hot air temperature, furnace top water, stretching tank pressure, combustion air flow, gas flow and other parameters. The production process control of hot blast stove combustion, air supply and stop. Under the trough sintered ore, miscellaneous ore, coke and other belt and weighing hopper blanking control. Logic control of furnace top rough sealing valve, pressure equalizing valve, venting valve, material flow regulating valve, α angle and β angle. Production and printing of data reports and alarm records.
3. Resolution decision:
2 sets of electric control IPCs for the hot blast stove; 3 sets of IPCs for the blast furnace hot blast stove body; 2 sets of IPCs on the top of the furnace; 2 sets of IPCs under the tank; 1 set of electric control PLC for hot blast stove; 1 set of PLC for blast furnace hot blast stove body; 1 set of bottom furnace roof.
The above three sets of PLCs each form an independent subsystem, which becomes a network through a 100MB switch and a Category 5 twisted pair, and communicates with each other to achieve data sharing. Each YONGS industrial computer is equipped with a 100MB Ethernet card, equipped with its own IP address and the same subnet mask in the same network segment. Connected to the respective switches through RJ45 twisted pairs to become their respective subsystems, and the network topology is star-shaped. The three switches communicate via RJ45 twisted pair in a cascaded manner.
Because the requirements for the operating system, system development software, and basic equipment of 10 machines are the same, a complete installation can be done on one machine, and after the detection is correct, an image file can be created through the GHOST software, and another machine can be cloned and installed. , and then fine-tuning can quickly realize large-scale and complicated installation tasks.
4. System operation and customer evaluation:
The YONGS industrial computer runs stably, quickly, safely, and handles data quickly and accurately.
The decision of the front and rear fans of the YONGS IPC reduces the internal dust accumulation.
YONGS industrial computer has many slots and reserved interfaces, and it has good expandability.
The decision of the USB interface on the front and back of the YONGS industrial computer brings great convenience to the regular backup program.
The comprehensive and complete technical support and thoughtful after-sales service of YONGS industrial control products are a big guarantee for users to use them with confidence.
