Process for the recovery of heat and chemicals from spent liquor
A process is described for the recovery of heat and chemicals from spent liquors consisting essentially of the steps of: (a) evaporating water from the liquor in a concentrator vessel to increase the solids concentration by heating under pressure greater than atmospheric to a temperature above the atmospheric boiling point of the liquor; (b) feeding the liquor from the concentrator vessel to an expansion vessel where the pressure and temperature are lowered but still maintained above the atmospheric pressure and above the atmospheric boiling point of the liquor to further increase the solids concentration of the liquor; (c) feeding the liquor from the expansion vessel to a second expansion vessel and mixing the liquor therein with ashes fed into said second expansion vessel under pressure and further expansion evaporating the mixture while still maintaining the mixture above atmospheric pressure and above the atmospheric boiling point of the liquor; and (d) feeding the mixture into a soda-ash furnace while maintaining the raised pressure and temperature in the second expansion vessel.
- Assignee:
- Oy Tampella AB, Tampere (Finland)
- Patent Number(s):
- US 5230773; A
- Application Number:
- PPN: US 7-575931
- OSTI ID:
- 6330544
- Resource Relation:
- Patent File Date: 31 Aug 1990
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHEMICAL FEEDSTOCKS
MATERIALS RECOVERY
SPENT LIQUORS
HEAT RECOVERY
BOILING POINTS
CONTAINERS
EVAPORATION
FURNACES
PRESSURE CONTROL
PRESSURIZATION
TEMPERATURE CONTROL
CONTROL
ENERGY RECOVERY
INDUSTRIAL WASTES
LIQUID WASTES
MANAGEMENT
MATERIALS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PROCESSING
RAW MATERIALS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
320303* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes