Automatic Control System in Cement Product Line.pdf

(1) System Structure

In the cement production line, the CCR (Central Control Room) is in charge of procedure control and system monitoring. Its scope includes raw meal proportioning and grinding, waste gas processing, putting raw materials into the kiln, preheating exchanger, rotary kiln, clinker storage, catalyst preparation, material blending and cement grinding. In terms of system functions, the system can be divided into three parts. They are the central control system, the network communication system and the field control systems.

(2) Requirements of Networks

The communication system provides communication between the field control system and the central control system via a double redundant industrial Ethernet network. Due to the environmental factors like dust, electromagnetic radiation and intrinsic safety, the industrial Ethernet switches are required to be qualified for international protection over IP40, industrial electromagnetic protection over level 4 and ignition-proof.

(3) Implementation

Industrial Ethernet switches such as SICOM3000BA, SICOM3000 and KIEN6000AB are employed in the redundant ring network of the communication system, to guarantee abilities of protection over IP40, dustproof, anti-EMI and wide temperature adaptability.

(4) Topology of Network

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