Oxycombustion In Transport Oxy-Combustor

A transport oxy-combustor comprising:

• a riser comprising a shell and insulation and erosion resistant refractory liners, wherein in the riser carbonaceous solids fuel is combusted in the presence of oxygen and circulating solids, which combustion forms a flue gas stream comprising a gas-solids mixture;
• a first stage cyclone having an inclined tangential inlet;
• an inclined first crossover connecting the riser with the first stage cyclone;
• a second stage cyclone;
• a second crossover connecting the first stage cyclone exit to the second stage cyclone;
• a third stage cyclone consuming excess oxygen in the flue gas stream with a scavenging solids fuel;
• a standpipe;
• a seal-leg under at least one of the first and second stage cyclones to return solids to the standpipe, and to provide a seal from a reverse flow of the flue gas stream;
• and
• at least one solids cooler, wherein the standpipe provides communication between the cyclones to the at least one solids cooler;
• wherein the at least one solids cooler is used to transfer combustion heat from the circulating solids to water and steam, forming one or more of steam and superheated steam.

A transport oxy-combustor comprising:

• a riser comprising a primary oxygen feed and a fossil fuel stream feed;
• a first gas-solids separation device;
• and
• a solids cooler with an exit cooler solids stream;
• wherein the exit cooler solids stream travels from the solids cooler to a lower section of the riser, where the exit cooler solids stream disperses pressurized oxygen from the primary oxygen feed;
• wherein the combustion of the fossil fuel stream and oxygen in the riser form flue gas exiting the riser;
• wherein the flue gas in the riser enters the first gas-solids separation device;
• wherein the first gas-solids separation device provides a solids stream to the solids cooler;
• and
• wherein the flue gas exiting the combustor contains substantially pure CO2 at elevated pressures after moisture condensation.