Accurate inline measurement of dissolved lignin in pulp suspension

The DLT-5500, Dissolved Lignin Transmitter, measures the dissolved lignin by use of an optical measurement technique. The inline sensor is applied for determining black liquor carry-over into bleach plants, black liquor solids in brownstock washing and oxygen delignification.

• Direct determination of dissolved lignin in pulp slurry
• Highly accurate UV/LED-based measurement
• Inline continuous measurement
• Installation flexibility, no flushing required

Benefits

• Key parameter in fiberline operations control
• Improve brownstock washing
• Enhanced oxygen delignification and D0 operations
• Reduce chemical costs
• Lower energy costs in evaporation plant
• Pre-calibrated with long term stability
• Low start-up and installation cost
• State-of the art communication platform

Specifications

System requirements
The transmitter is intended for inline installations and use at media temperatures in the range of 5 °C to 120 °C (16 °F – 248 °F) and a process pH of 2 – 4. The DLT-5500 is mounted through a ball-valve assembly in a stud and is fitted with a retraction system. It is rated for voltages of 100 – 240 VAC at 50 Hz / 60 Hz.

Sample Specification
Sample temperatures in the range of 5 °C to 120 °C (16 °F – 248 °F) with consistencies of 0 – 12% depending on pulp type.