Process and apparatus for recovery of spent pulping liquors

Patent · Tue Dec 01 04:00:00 EST 1981

OSTI ID:5127196

Dinovo, S T; Ballantyne, W E

An integrated system for recovery of energy and chemicals from concentrated black liquor was described, consisting of a fluidized-bed reactor to provide the combustion of 80-90% of black sulfite liquor, a cyclone separator, a reducer for burning the solid combustion products from the fluidized-bed reactor, a gasifier (which is optional) for solid combustion products from the reactor, and a heat exchanger for removal of heat from effluent gases. Thus, 69-90% of C was utilized when kraft black liquor with approximately 67.5% solids content and air were introduced at 110-130 lb/hour and approximately 82 cubic meters/minute, respectively, into a fluidized bed reactor at 1280-1360 degrees F, and the combustion was carried out with approximately 715 lb black liquor for approximately 10 hours.

• Assignee: International Paper Co.
• Patent Number(s): US 4303469
• OSTI ID: 5127196
• Country of Publication: United States
• Language: English

Related Subjects

090500* -- Liquid Waste Fuels-- (-1989)
10 SYNTHETIC FUELS
CHEMICAL REACTIONS
COMBUSTION
CONCENTRATORS
CYCLONE SEPARATORS
ENERGY RECOVERY
EQUIPMENT
FLUIDIZED-BED COMBUSTION
GAS GENERATORS
HEAT EXCHANGERS
INDUSTRIAL WASTES
INERTIAL SEPARATORS
LIQUID WASTES
OXIDATION
POLLUTION CONTROL EQUIPMENT
RECOVERY
SEPARATION EQUIPMENT
SPENT LIQUORS
THERMOCHEMICAL PROCESSES
WASTE PRODUCT UTILIZATION
WASTES