Emerson Process Management's Rosemount 848T eight-input temperature transmitter can integrate existing analog instrumentation into a Foundation Fieldbus environment.


Digital plant architecture and batch process control automation systems from Emerson Process Management Asia-Pacific have been successfully installed at a new polyvinyl chloride (PVC) production facility of Yichang Yihua Pacific Chemical Co. Ltd., a leader in the Chinese fertilizer industry. The plant, which went into operation in Hubei Province in October 2007, realizes PVC production capacity of 120,000 tons per year.

The Emerson PlantWeb digital plant architecture and DeltaV digital automation system were selected by Yichang Yihua Pacific Chemical Co. following extensive comparisons of batch process control software. Final selection of Emerson tools was based on their demonstrated performance and batch-to-batch consistency, according to the Austin, Texas-based company. In addition, Emerson implemented Foundation Fieldbus technology -- the first PVC project to adopt the advanced digital communications protocol, according to controls supplier.

"The main goals of this project were to achieve an output of 120,000 tons per year along with lower production costs, said project manager Huang Chuanyu. "With the help of Emerson engineering [staff's] experience, the startup was successful within the least possible time. The project cost was kept low, due in part to savings in wiring with the PlantWeb architecture and the fast, on-time startup."

Emerson provided hardware design from its engineering center in Pudong as well as on-site system integration, project management and field services. The latter included assisting Yichang Yihua Pacific Chemical employees in optimizing the batch solution during startup and ongoing operations.

The project also included 50 Rosemount 848T digital temperature transmitters and the company's AMS Suite of predictive maintenance software. The use of this software to communicate with smart field devices was instrumental in speeding up instrument commissioning and helping plant personnel achieve the successful startup, according to the company.

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