Automatic control of steam-heated distillation plants

© sivivolk, image #157237143, 2018, source: Fotolia.com

Information

Impacts:
Energy
Sector:
Manufacture of food, beverages and tobacco
Investment cost:
Medium cost
Cost:
Medium cost

All steamed up

  • Food company investigates ways to optimise its steam production plant
  • Discovers a feed-forward system can iron out steam production fluctuation 

Steam is a major component in most food manufacturing. One producer uses steam-heated distillation columns, for example, as part of its production, but was having problems with fluctuating inflow. This was causing unstable operations and excess steam consumption.

The company needed an automated solution to better regulate its heating steam. This included a fixed set point for steam use which guaranteed a stable operating range and compliance with relevant specifications. 

One option investigated was a feed-forward connection between the feed stream and the steam application. This involves a measuring system to moderate inflow, a control valve and other control instruments. The proposed solution is also relatively simple to retrofit with some modifications to the existing control system, which keeps investment costs low.

Key benefits

Automatic steam control offers the following benefits:

  • Rapid and exact adaption of the steam applied
  • Reduced energy consumption
  • Predictable plant operation

NAMUR, User Association of Automation Technology in Process Industries e.V., Procedure for Enhancing Energy Efficiency in chemical Plants - Contribution of Automatisation Engineering, Worksheet NA 140, p. 50 f., http://www.namur.net/de/arbeitsfelder-u-projektgruppen/af-4-betrieb-und…

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