Recovery and re-use of waste energy in industrial facilities

Patent metadata

Field	Value
Publication number	US-10480864-B2
Application number	US-201715833088-A
Country	US
Kind code	B2
Filing date	Dec 6, 2017
Priority date	Aug 24, 2015
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

Configurations and related processing schemes of direct or indirect inter-plants (or both) heating systems synthesized for grassroots medium grade crude oil semi-conversion refineries to increase energy efficiency from specific portions of low grade waste heat sources are described. Configurations and related processing schemes of direct or indirect inter-plants (or both) heating systems synthesized for integrated medium grade crude oil semi-conversion refineries and aromatics complex for increasing energy efficiency from specific portions of low grade waste sources are also described.

First claim

The invention claimed is:

1. A system comprising:
a hydrocracking plant of a crude oil refining facility, the hydrocracking plant comprising feed furnaces, a first stage reaction section comprising a fixed-bed reactor vessel, a second reaction stage comprising another fixed-bed reactor vessel, and a fractionator column, wherein the hydrocracking plant is configured to perform at least one crude oil refining process and to flow a hydrocracking plant stream comprising at least one of a first stage reaction section feed stream to a first stage cold high pressure separator, a diesel product stream, a kerosene product stream, a second reaction stage feed stream to a second cold high pressure separator, a product stripper overheads stream, a kerosene pumparound stream;
an oil refining plant of the crude oil refining facility, the oil refining plant being different from the hydrocracking plant, the oil refining plant comprising at least one of a sulfur recovery plant comprising an amine regenerator distillation column, a sour water stripper plant comprising a sour-water stripper distillation column, a gas separation plant comprising a de-ethanizer distillation column and a propane-butane splitter distillation column and through which a gas separation plant stream comprising at least one of C2 to C4 flows in the gas separation plant, a naphtha hydro-treating plant comprising a naphtha splitter distillation column, an amine regeneration plant separation section comprising an acid gas absorber vessel and an acid gas regenerator vessel, wherein an acid gas regenerator bottoms stream comprising a weak amine salt flows through the amine regeneration plant;
a flow control system connected to the hydrocracking plant and the oil refining plant, the flow control system comprising one or more flow pumps, one or more flow pipes, and one or more valves, wherein the flow control system is configured to:
flow the hydrocracking plant stream from the hydrocracking plant to a heat exchanger, and
flow a stream from the oil refining plant to the heat exchanger; and

the heat exchanger configured to transfer a portion of heat flowed through the hydrocracking plant stream to the stream from the oil refining plant.

2. The system of claim 1 , wherein the oil refining plant is the sulfur recovery plant,
wherein the stream is an amine regenerator bottoms stream,
wherein the hydrocracking plant stream comprises the first stage reaction section feed stream to the first stage cold high pressure separator,
wherein the heat exchanger is configured to transfer the portion of the heat flowed through the first stage reaction section feed stream to the amine regenerator bottoms stream, and
wherein the flow control system is configured to flow the heated amine regenerator bottoms stream to an amine regenerator bottoms of the sulfur recovery plant.

3. The system of claim 1 , wherein the heat exchanger is a first heat exchanger,
wherein the oil refining plant comprises the sour water stripper plant,
wherein the stream is a sour water stripper bottoms stream,
wherein the hydrocracking plant stream comprises the diesel product stream, the first stage reaction section feed stream to the first stage cold high pressure separator, and the kerosene product stream, and
wherein the first heat exchanger is configured to transfer the portion of the heat carried by the diesel product stream,
wherein the system comprises:
a second heat exchanger configured to transfer a portion of heat carried by the first stage reaction section feed stream to the sour water stripper bottoms stream; and
a third heat exchanger configured to transfer a portion of heat carried by the kerosene product stream to the sour water stripper bottoms stream, and

wherein the flow control system is configured to flow the heated sour water stripper bottoms stream through the sour water stripper plant.

4. The system of claim 3 , wherein the first heat exchanger, the second heat exchanger and the third heat exchanger are fluidically coupled to each other in parallel.

5. The system of claim 1 , wherein the heat exchanger is a first heat exchanger,
wherein the oil refining plant comprises the gas separation plant and the sulfur recovery plant,
wherein the stream comprises a C3/C4 splitter bottoms stream in the gas separation plant, a sulfur recovery plant bottom cold stream in the sulfur recovery plant and a de-ethanizer bottoms stream in the gas separation plant,
wherein the hydrocracking plant stream is the second reaction stage feed stream to the second cold high pressure separator stream, the first stage reaction section feed stream to the first stage cold high pressure separator stream, and the kerosene product stream,
wherein the first heat exchanger is configured to transfer the portion of the heat from the second reaction stage feed stream to the C3/C4 splitter bottoms stream in the gas separation plant,
wherein the system further comprises:
a second heat exchanger configured to transfer a portion of heat from the first stage reaction section feed stream to the sulfur recovery plant bottom cold stream in the sulfur recovery plant, and
a third heat exchanger configured to transfer a portion of heat carried by the kerosene product stream to the de-ethanizer bottoms stream in the gas separation plant, and

wherein the flow control system is configured to:
flow the heated sulfur recovery plant bottom cold stream to the sulfur recovery plant,
flow the heated de-ethanizer bottoms stream to the gas separation plant, and
flow the heated C3/C4 splitter bottoms stream to the gas separation plant.

6. The system of claim 1 , wherein the heat exchanger is a first heat exchanger,
wherein the oil refining plant comprises the naphtha hydro-treating plant and the sulfur recovery plant,
wherein the stream comprises a naphtha splitter bottoms stream in the naphtha hydro-treating plant and an amine regenerator bottoms stream in the sulfur recovery plant,
wherein the hydrocracking plant stream comprises the diesel product stream, the product stripper overheads stream, the kerosene pumparound stream, the kerosene product stream, and
the first stage reaction section feed stream to the first stage cold high pressure separator, and
wherein the first heat exchanger is configured to transfer the portion of the heat from the diesel product stream to the naphtha splitter bottoms stream in the naphtha hydro-treating plant, and
wherein the system further comprises:
a second heat exchanger configured to transfer a portion of heat from the product stripper overheads stream to the naphtha splitter bottoms stream in the naphtha hydro-treating plant,
a third heat exchanger configured to transfer a portion of heat from the kerosene pumparound stream to the naphtha splitter bottoms stream in the naphtha hydro-treating plant,
a fourth heat exchanger configured to transfer a portion of heat from the kerosene product stream to the naphtha splitter bottoms stream in the naphtha hydro-treating plant, and
a fifth heat exchanger configured to transfer a portion of heat from the first stage reaction section feed stream to the amine regenerator bottoms stream in the sulfur recovery plant, and

wherein the flow control system is configured to:
flow the heated naphtha splitter bottoms stream to the naphtha hydro-treating plant; and
flow the heated amine regenerator bottoms stream to the sulfur recovery plant.

7. The system of claim 6 , wherein the first heat exchanger, the second heat exchanger, the third heat exchanger and the fourth heat exchanger are fluidically coupled to each other in parallel.

8. The system of claim 1 , wherein the heat exchanger is a first heat exchanger,
wherein the oil refining plant comprises the sour wat

Assignees

• Saudi Arabian Oil Co

Inventors

• Noureldin Mahmoud Bahy Mahmoud
• Al Saed Hani Mohammed

Classifications

• C10G65/00

  Treatment of hydrocarbon oils by two or more hydrotreatment processes only · CPC title

• C10G33/06

  with mechanical means, e.g. by filtration · CPC title

• C10G45/02

  to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing · CPC title

• C01B3/24

  of hydrocarbons · CPC title

• C02F2101/16

  Nitrogen compounds, e.g. ammonia · CPC title