Two-stage coal gasification process

Details Two-stage coal gasification process Two-stage coal gasification process

C - Chemistry, Metallurgy

10

J

48/6

C10J 3/48 (2006.01) C10J 3/46 (2006.01)

Patent

CA 2000446

ABSTRACT A two-stage upflow process for coal gasification and an apparatus useful therefor. An oxygen-containing gas and a first increment of a coal- in-water slurry are ignited in a horizontal fired slagging reactor by means of horizontal coaxial juxtaposed burner nozzles mounted in the reactor, thereby converting the oxygen, the coal, and the water into steam and gaseous combustion products. The discharge from the fired reactor is contacted overhead with a second increment of coal-water slurry in a vertical unfired heat-recovery unit connected to the upper end of the reactor. The heat evolved in the reactor is used in the heat recovery unit to convert the second increment of coal-water slurry into more steam, char and synthesis gas. The gas effluent is separated from the solid char, and synthesis gas is passed into a fire-tube boiler to recover heat and the cooled product gas is recovered as the desired fuel-rich product. The 29,860A-F solid char is reslurried and recycled to the fired reactor 3 for further combustion. 29,860A-F

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