Plantweb keeps oil crude and tall
Emerson Process Management has supplied PlantWeb digital plant
architecture with Foundation fieldbus technology and intelligent
process instrumentation to a greenfield plant for Forchem in Finland.
The new plant distills and processes crude tall oil (CTO), a pulp
industry by-product.
 The
plant started production in November 2002, just 13 months after
work began, and at full capacity will achieve 150,000 tons a year.
Over 300 intelligent field devices were supplied by Emerson, approved
intrinsically safe for use in a hazardous area, according to the
FISCO concept. instrumentation included Rosemount temperature and
pressure transmitters, and pH meters and toroidal conductivity measurement
systems from Rosemount Analytical.
The plant has installed over twenty Rosemount 848T eight channel
temperature measurement systems, which are specifically designed
for multiple point temperature monitoring on Foundation fieldbus
installations. Flowmeters supplied include Micro Motion Coriolis
meters, plus Rosemount vortex and magnetic flow transmitters, with
Fisher and Baumann control valves using Fieldvue digital valve controllers.
In addition to its core use of Foundation fieldbus technology,
the DeltaV digital automation system also uses Profibus-DP fieldbus
communications for discrete controls such as motor control centres
and frequency converters. A redundant Modbus interfaces to fail-safe
PLCs. SIS installations use Rosemount pressure and temperature transmitters
with conventional 4-20mA loops, supervised using HART digital communications.
Via the OPC server, the DeltaV system enables access to monitoring
of over 900 electrical heat tracing loops. All intelligent field
devices are managed by the integrated AMS predictive maintenance
software, providing a single window concept to the field.
Optimised performance Forchem is able to monitor and optimise
the performance of the plant and production processes remotely.
This access to the PlantWeb architecture is achieved using web-browsers,
served by the DeltaV web-server and OSI PI ProcessBook remote concepts.
This enables continuing process development and optimisation, based
on current plant conditions and performance and the results of the
process simulation.
The contract for the know-how, design, supply, and construction
of the crude tall oil fractionation plant was entrusted to Rintekno
of Espoo, Finland. Simulation techniques were used in the design
and test of new distillation concepts, to optimise the process yield
and save energy. Systecon, a subsidiary of Rintekno, engineered
the plant and supplied the process automation and information management
systems, plus electrical systems.
Systecon also remotely monitors the DeltaV system performance,
and via remote access uses AMS predictive maintenance software within
DeltaV to monitor device diagnostics within the field instrumentation,
and other sub-systems, for maintenance prediction and planning.
Both device and equipment health and process health information,
including device alarms are made available over the PlantWeb network
to those running the plant both locally and remotely.
Forchem plant management uses the same web-server functions through
their office PC network to access plant data. The information feeds
into company-wide ERP systems where it is used to maximise the benefits
from efficient information management. The Event Historian and Continuous
Historian databases are provided as part of the OSI PI ProcessBook
utilised by the DeltaV system. Additionally, overall loop performance
is measured continuously by the DeltaV Inspect application, and
this information guides operations and engineering to focus on and
optimise the key "money making" loops.
Emerson Process Management
p138@industrialnetworking.co.uk
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