Black liquor gasification with integrated warm-up and purge
AssigneeCombustion Engineering, Inc.
InventorMichael C. Tanca
Life of this patent
Estimating the term…
Abstract
A kraft black liquor gasification system is provided with a hot flue gas generator which serves both as a means for generating a hot flue gas to warm-up the gasifier in preparation for start-up and as a means for generating an inert purge gas to purge the gasifier of flammable gases in the event of an emergency trip of the gasifier. A control system controls the operation of the burner during warm-up in response to the gasifier temperature and during the purge in response to the purge gas composition and temperature.
Claims6
A system for warming a black liquor gasifier in preparation for start-up and for purging said black liquor gasifier of flammable gas after a trip comprising:
- a. a black liquor gasifier;
- b. a hot flue gas generator;
- c. means for feeding fuel and combustion air to said hot flue gas generator and burning said fuel and air therein to generate said hot flue gases;
- d. means for feeding said hot flue gases from said hot flue gas generator to said black liquor gasifier to warm said gasifier;
- e. means for terminating said fuel and air to said hot flue gas generator when said gasifier reaches a selected temperature;
- f. means for detecting a gasifier trip requiring the purge of flammable gases therefrom;
- g. means responsive to the detection of a gasifier trip for feeding fuel and combustion air to said hot flue gas generator and producing a hot flue gas purge stream;
- h. means for feeding said hot flue gas purge stream to said tripped gasifier to purge said flammable gases therefrom.
Dependencies are inferred from the claim text.