Increase production capacity with
Chemrec OX300 Booster
Recovery capacity boosting and lime kiln fuel replacement
The effort to increase production in pulp mills is often constrained by the black liquor recovery capacity, the most expensive process unit in the mill. This constraint can be overcome by installing a Chemrec Booster adding incremental black liquor recovery capacity at an attractive investment cost level.
By replacing the air used in the Booster for the partial oxidation with pure oxygen a higher heating value fuel gas can be produced. This fuel gas produces a flame hot enough to be used to replace fuel oil or natural gas in the kraft mill lime kiln. This gasifier design is called OX300 Booster.
Production capacity increase of 80 000 tons of pulp yearly
The established Booster technology is the A300 atmospheric air-blown model. This booster is since many years extending the recovery capacity at the Weyerhaeuser, New Bern mill in North Carolina. This technology produces a low heat value fuel gas used for steam generation in the mill. A gasifier processing 350 metric t black liquor solids per day (0.77 MM#/d) not only gives a production capacity increase equal to some 80 000 t of pulp per year but also produces fuel gas worth around $6 million/year as natural gas replacement at a gas price at $8 /MMBTU (~ €200/1000 m3).
Removing the recovery bottleneck
With a substantial oxygen production unit already needed for the gasification, oxygen can be supplied at an attractive cost to users within the mill. Use of oxygen-enriched combustion air in the kiln can help in meeting the kiln capacity demand. All in all, the OX300 Booster is a very attractive proposition for a mill with the opportunity to increase production when the recovery bottleneck is removed.
The OX300 is a simple and reliable system for recovery capacity increase and fuel gas generation.