Systems for recovery and re-use of waste energy in crude oil refining facility and aromatics complex through simultaneous intra-plant integration and plants' thermal coupling

A system comprising:

• a plurality of oil refining plants in a crude oil refining facility, each oil refining plant configured to perform at least one oil refining process including an aromatics plant comprising a plurality of aromatics sub-units, wherein a plurality of streams at respective temperatures flow between the plurality of oil refining plants;
• a flow control system configured to:
• flow multiple streams, each stream from a sub-unit of the plurality of aromatics plant sub-units to one or more heat exchangers, and
• flow a stream from a first oil refining plant of the plurality of oil refining plants, the first oil refining plant being different from the aromatics plant, to the one or more heat exchangers,
• a heat exchanger system comprising the one or more heat exchangers, which are configured to transfer heat from one or more of the multiple streams to the stream from the first oil refining plant,
• wherein the stream in the first oil refining plant comprises an acid gas regenerator bottom stream comprising a weak amine salt in an amine regeneration plant separation section, wherein the multiple streams of the multiple aromatics plant sub-units comprise a raffinate overhead stream in an aromatics complex xylene products separation unit, and wherein the heat exchanger system is configured to directly heat the acid gas regenerator bottom stream using the raffinate column overheads stream.

A system comprising:

• a plurality of oil refining plants of a crude oil refining facility, each oil refining plant configured to perform at least one oil refining process, wherein a plurality of streams at respective temperatures flow between the plurality of oil refining plants, wherein a stream in a first oil refining plant of the plurality of oil refining plants comprises an amine regeneration plant separation section acid gas regenerator bottom stream in an amine regeneration plant separation section, wherein a stream in an aromatics plant of the plurality of oil refining plants comprises a raffinate overhead stream in an aromatics complex xylene products separation unit of the aromatics plant;
• a flow control system configured to:
• flow multiple streams, each stream from a sub-unit of a plurality of aromatics plant sub-units included in the aromatics plant, to one or more heat exchangers, wherein the multiple streams comprise the raffinate overhead stream, and
• flow the amine regeneration plant separation section acid gas regenerator bottom stream from the first oil refining plant, the first oil refining plant being different from the aromatics plant, to the one or more heat exchangers, wherein the one or more heat exchangers transfer heat from one or more of the multiple streams to the stream from the first oil refining plant;
• and
• a heat exchanger system comprising the one or more heat exchangers, which are configured to transfer heat from one or more of the multiple streams to the stream from the first oil refining plant, the one or more heat exchangers configured to:
• heat a buffer fluid using the raffinate column overheads stream in a first heat exchanger, and
• heat the amine regeneration plant separation section acid gas regenerator bottom stream using the heated buffer fluid stream in a second heat exchanger.