26.05.2010 | Author / Editor: L. Enijang / Marcel Dröttboom
In order to guarantee a reliably running transportation system in spite of even the harshest environments, plant designers decided to implement the peripheral devices of the coal transport facilities for Chongquing’s Yongchuan coal processing plant via a fieldbus system. Turck’s established BL67 series won the race.
In order to cover the constantly increasing demand for energy, China has continously been expanding its coal production capacities. One of the beneficiary cities is Chongqing – one of China’s so called direct-controlled municipalities (besides Beijing, Tianjin and Shanghai). Being home to more than 32 million people, the independent administrative unit is the largest city worldwide. Its land area (around 82 square kilometres) is just a little smaller than Austria’s land area.
In autumn 2006 the Shandong Electric Power Engineering and Consulting Institute (SDEPCI) has begun to expand the Yongchuan plant’s capacity with another two 135 MW units for processing lower quality coal. The project was funded by the China Power Investment Corporation and the Chongqing Jiulong Power. After a project duration of 16 months both plants went on line in January 2008.
In order to transport the coal from its repository to the coal mills that precede the burning kilns, an extensive transport system runs through the entire plant. This transport system has to be reliable at all times, in order to guarantee an unobstructed plant operation. This is why the plant designers made great demands on the automation solutions being used.
Ultimately, countless sensors and actuators spread all over the plant area have to be operated coordinately – in spite of dust, dampness, vibrations, noise or electromagnetic interferences. A conventional automation architecture would not have met these demands, which is why the plant designers chose a modern fieldbus system for the signal transmission between PLC and sensors/actuators. The proper fieldbus system, featuring a modular design and IP67 protection, does not only guarantee interference-free communication between all devices involved, but it also provides a high grade of data integrity, protection against vibration and extensive diagnostic functionality.
After analysing fieldbus systems from different producers, the plant designers of Shandong LuNeng Engineering – entrusted with engineering and commissioning of the new plant’s automation solutions – chose a fieldbus solution from Turck. In order to guarantee...
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