NEW INTRINSICALLY‐SAFE DIGITAL BUS ENABLED, MULTI‐ VARIABLE FLOW SENSING SOLUTION FOR ADVANCED PETROCHEMICAL ROCESS ANALYTICS CONTROL AND MONITORING

摘要

Petrochemical facilities and associated process analyzer equipment are in need of robust andrnremotely‐accessed flow metering/control instruments, mainly in process analytical (PA) samplernflows; of which, require particulate tolerance, high‐temperature and chemical resistance, andrnother conditions that require “ruggedness”, pressure/electrical safety, and signal repeatability.rnThe technology presented in this paper is a new category of multi‐variable differential pressurern(MVDP) flow technology, developed for hazardous‐area petrochemical low‐flowrnmonitoring/control along with a new intrinsically‐safe (IS) digital CANbus (Control Area Network)rnarchitecture. Design and technical features of the MVDP sensor, new IS CANbus concepts, andrnflow performance data are presented and general comparison are made against existingrntechnologies including thermal mass flow controllers (MFC’s) and variable area (VA) flow meters.