Reduced Sulphur Emissions

The BLOX sensor, developed by the Pulp & Paper Institute of Canada, measures the extent of oxidation of black liquor. The sensor provides an analog output, proportional to the concentration of sodium sulphide. Typically installed after the black liquor oxidizer, the output signal may be used to control the oxidation process ensuring optimum combustion of liquor in the recovery boiler.

Increased Boiler Efficiency

Improved control of the oxidation process reduces periods of over or underoxidation. Overoxidized black liquor can become viscous and cause process upsets due to the formation of inorganic deposits and fouling of valves, fittings and process lines. A loss of calorific value may also occur. Underoxidized black liquor can result in an increase in TRS emissions.

Design Specifications, Model BLX-SP2

Patented Technology
Southwell Controls is exclusively licensed by PAPRICAN (Pulp & Paper Research Institute of Canada)
to manufacture and market the patented BLOX sensor.