Energy-efficient gasification-based multi-generation apparatus, facilities, or systems, and methods of modifying existing gasification-based multi-generation apparatus and the various conventional
thermal coupling arrangements, are provided. Apparatus for managing
waste heat recovery through integration of a gasification-based multi-generation facility or other multi-generation
system with a
hydrocarbon refining facility or other
hydrocarbon refining
system and methods of providing the respective integration are also provided. An exemplary apparatus includes an integrated site
energy management system configured according to one or more process-based
thermal coupling schemes comprising one or more
thermal coupling arrangements between a gasification-based multi-generation system or facility and a
hydrocarbon refining system or facility. The gasification-based multi-generation system or facility can include an
acid gas removal system or
plant configured to remove acidic contaminants from a raw
syngas feed to thereby provide a treated
syngas feed, the
acid gas removal system or
plant containing a separation section including a
solvent regenerator, and a gasification system configured to generate the raw
syngas feed from a carbon-based feedstock. The hydrocarbon refining system or facility can include an aromatics system or
plant containing a
xylene products separation section including one or more of the following: an Extract column and a
Raffinate column. The integrated site
energy management system can include a hot-water system extending between the separation section of the
acid gas removal system or plant and the
xylene products separation section of the aromatics system or plant, and a plurality of added
heat exchanger units providing various advanced thermal
coupling arrangements.