Gasification of high-ash feedstock

A process for the gasification of a residue stream comprising liquid hydrocarbons and metal-rich solid particles, said process comprising:

• reacting the residue stream with an oxidant stream in a gasifier to produce a hot syngas stream comprising carbon monoxide, hydrogen, and soot;
• contacting the hot syngas stream with a quench water stream to produce a quenched syngas stream and a soot-containing quench water stream;
• washing the quenched syngas stream with a scrubber water stream to produce a raw syngas stream and a soot water stream;
• separating the soot-containing quench water stream and at least a portion of the soot water stream to produce one or more overhead vapor streams and a concentrated soot water stream;
• filtering the concentrated soot water stream to produce a solid filter cake and a liquid filtrate stream;
• dividing at least a portion of the liquid filtrate stream to form a heat exchange filtrate fraction;
• transferring heat to the heat exchange filtrate fraction from one or more of the following streams:
• the one or more overhead vapor streams and the concentrated soot water stream;
• and
• combining the heat exchange filtrate fraction with at least a portion of the stripped water stream,
• wherein the quench water stream comprises at least a portion of one or more of the following:
• the soot-containing quench water stream, a stream derived from the soot-containing quench water stream, the soot water stream, and a stream derived from the soot water stream, and
• wherein the raw syngas comprises between 40% and 50% water by volume.