Combustion of black liquor
Patent
·
OSTI ID:5322140
This patent describes an improvement in the combustion of black liquor in an existing Tomlison recovery boiler unit in which black liquor is sprayed into a furnace in which it is successively dried, pyrolyzed and converted to a bed of solid carbonaceous residue, using a primary air stream and a secondary air stream and the residue is subsequently converted to a smelt. The improvement comprises: the addition of between an effective amount up to 5% oxygen by volume to the primary air stream directed at the bed of solid carbonaceous residue, the amount of oxygen added being sufficient to increase the adiabatic flame temperature, the combustion rate of the solid carbonaceous material, the rate of pyrolysis, the temperature in the lower portion of the furnace, the the drying rate of black liquor droplets, and to decrease the temperature of the gases entering the heat transfer surfaces in the upper portion of the furnace and the rate of deposit formation on the surfaces and wherein the amount of black liquor combusted is increased as compared with the amount combusted in the same furnace operated without the addition of oxygen to the primary air.
- Assignee:
- Air Products and Chemicals, Inc., Allentown, PA
- Patent Number(s):
- US 4857282
- Application Number:
- PPN: US 7143904A
- OSTI ID:
- 5322140
- Country of Publication:
- United States
- Language:
- English
Similar Records
Gasification of black liquor
Gasification of black liquor
Gasification of black liquor
Patent
·
Tue Jul 28 00:00:00 EDT 1987
·
OSTI ID:6193388
Gasification of black liquor
Patent
·
Tue Jul 28 00:00:00 EDT 1987
·
OSTI ID:866319
Gasification of black liquor
Patent
·
Tue Jul 28 00:00:00 EDT 1987
·
OSTI ID:7012355