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Foul Condensate Stripping Systems
Stripping columns are an efficient method of treating kraft pulp mill foul condensates for odorous total reduced sulphur (TRS) and biological oxygen demand (BOD) compounds.
A.H. Lundberg's advanced and well-engineered Foul Condensate Stripping Column Systems will:
- Remove these odorous contaminants from selected Foul Condensate streams from the digester and evaporator areas. This process is critical to off-loading the effluent treatment system and keeping the mill in compliance with environmental permits and regulations
- Recover the valuable heat used for stripping in a manner that meets the mill’s integrated energy recovery objectives. This heat is recovered in the reflux condenser by producing steam, heating boiler feed water, or heating black liquor
- Produce stripper off-gas (SOG) and subsequent crude methanol of a consistent quality for feed to a methanol purification system or for disposal by incineration, and
- Produce stripped condensate of a consistent quality for re-use in the mill. Typical uses in clude brown stock washing and lime mud washing
Condensate Stripping Column System
Includes the following:
- Feed tank
- Fibre filter
- Condensate preheater
- Stripping column with rectification section
- Reflux condenser
The Foul Condensate Stripping System may be designed to use structured packing, random packing, tray systems, or a combination of these steam to liquid stripping technologies. Optional enhancements to the Foul Condensate Stripping System can include the selective condensation and storage of crude liquid methanol from the stripper off-gas for use as an auxiliary fuel.