Abstract: A system includes a slurry inlet of the gasifier that receives a feedstock slurry and a gasification section of the gasifier that gasifies the feedstock slurry to produce syngas. The system includes a quench chamber to cool the syngas produced in the gasification section using a liquid feed to produce a quench blow down and quenched syngas. The quench blow down has solids produced as a by-product from gasification. The system includes a quench blowdown outlet which discharges the quench blow down and a slag sump liquid such that the solids concentration of the quench blowdown is reduced. The system includes a syngas outlet which discharges the syngas and a syngas scrubber fluidly coupled to the syngas outlet and to the quench chamber. The syngas scrubber includes a syngas inlet, a scrubbed syngas outlet, and a scrubber blow down outlet fluidly coupled to a fluid inlet of the gasifier.

Abstract: A system includes a syngas cooler and a compatible seal gas system. The syngas cooler may be configured to cool a syngas. The compatible seal gas system may be configured to supply a compatible seal gas to a seal of the syngas cooler. The seal may be configured to block the syngas from a passage between an outer wall of the syngas cooler and a tube cage of the syngas cooler.

Abstract: In one embodiment, a black water processing system includes a vacuum pressure flash tank configured to separate gases from black water. The system also includes an ejector with a suction chamber and a nozzle. The suction chamber is coupled to the vacuum pressure flash tank, and the nozzle is configured to discharge a motive fluid across the suction chamber to create a vacuum within the vacuum pressure flash tank.

Abstract: A system includes a syngas cooler and a compatible seal gas system. The syngas cooler may be configured to cool a syngas. The compatible seal gas system may be configured to supply a compatible seal gas to a seal of the syngas cooler. The seal may be configured to block the syngas from a passage between an outer wall of the syngas cooler and a tube cage of the syngas cooler.

Abstract: In one embodiment, a black water processing system includes a vacuum pressure flash tank configured to separate gases from black water. The system also includes an ejector with a suction chamber and a nozzle. The suction chamber is coupled to the vacuum pressure flash tank, and the nozzle is configured to discharge a motive fluid across the suction chamber to create a vacuum within the vacuum pressure flash tank.