Abstract: Based on analyzing the present monitoring and controlling situations of the pilot-plant equipments for terpene chemicals, DCS technique has been firstly conducted to design and construct the CDMCS (Central digital monitoring and controlling system), and then applied to upgrading reconstruction for central monitoring system of terpene chemicals pilot-plant equipments. The CDMCS has passed system and equipment debygging, online operating tests, and application tests. The CDMCS has run in real charge operations for 90 days and it reached the predictive goal and effects: temperature accuracy ± 1℃ for controlling, and 0.1℃ for displaying, pressure accuracy 1 kPa for controlling, and 0.1 kPa for displaying. The work is a new practice, and can play a good modeling role and have bright application prospect for reconstruction of old systems such as the terpene chemicals pilot-plant equipments in research organizations or industrial enterprises.

Key words: terpene chemicals pilot-plant equipments, upgrading reconstruction, CDMCS, DCS