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Case Study:

Optimise Specific Steam Consumption


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Customer Details

A kraft paper mill in Eastern India
Problems
- Impact on machine production due to poor
condensate evacuation
- Poor condensate recovery (65%)
- High back pressure (2.5 barg) in main common tank
- Boiler pressure not maintained
- High specific steam consumption
(2.1-2.2 ton per ton of paper)
Objective

To optimise specific steam consumption with
improve productivity and condensate recovery
factor
Solution

Forbes Marshall carried out a detailed study of the
plant and engineered a thermal grouping cascade
based solution for effective utilisation of flash
steam, alongwith with the following solutions
- Steam flow meter and condensate flow meter
- Pressure, differential and level control loops
- Mini distributed control system
Benefits
- Specific steam consumption brought down to 1.6 - 1.7 ton per ton of paper
- Improvement in condensate recovery - from 55% to 90%
- Boiler pressure maintained at desired levels
- Realtime monitoring and control of all parameters
- 6% increase in productivity