Patent ID: 7908841

Claim:
A coal combustion system, the system comprising: a swirl chamber having an input configured to receive a coal-water slurry, the swirl chamber causing the coal-water slurry to mix with discharge air from a compressor to gasify the coal-water slurry and create a synthesis gas, the swirl chamber also having a second end configured to expel the synthesis gas; a cyclone separator directly coupled to the second end of the swirl chamber, the cyclone separator having an extraction port and causing particulate matter in the synthesis gas to accumulate at a periphery of the cyclone separator, the cyclone separator also having an output that outputs a rich gas stream, a separator throat region having an outer wall that is narrower than outer walls of the cyclone separator, a cooled extraction manifold outside of the separator throat region, and an extraction pipe coupled to the cooled extraction manifold configured to remove particulate matter; and a second stage combustion input coupled to the output of the cyclone separator; wherein the cyclone separator is directly coupled to the second stage combustion input.