Energy efficient gasification-based multi generation apparatus employing energy efficient acid gas removal plant-directed process schemes and related methods

Patent metadata

Field	Value
Publication number	US-9528055-B2
Application number	US-201514692666-A
Country	US
Kind code	B2
Filing date	Apr 21, 2015
Priority date	Jun 28, 2014
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

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. An exemplary gasification-based multi-generation apparatus comprises an acid gas removal system configured to remove acidic contaminants from a raw syngas feed to thereby provide a treated syngas feed and an acid gas removal plant or facility; a gasification system configured to generate the raw syngas feed from a carbon-based feedstock and comprising a gasification plant or facility; and a condensate polishing plant or facility. The acid gas removal system comprises an acid gas contaminant absorber, a solvent regenerator, a contaminant hydrolysis reactor, and an acid gas removal system energy management system. The acid gas removal system energy management system comprises a sixth acid gas removal system process-to-process heat exchanger unit positioned to receive at least a portion of a polished cold condensate stream from the condensate polishing plant or facility to provide heat energy to the at least a portion of the polished cold condensate stream. The gasification system comprises a gasification reactor and a gasification system energy management system. The acid gas removal plant or facility is integrated with the condensate polishing plant or facility through the at least a portion of the polished cold condensate stream received by the sixth acid gas removal system process-to-process heat exchanger unit.

First claim

That claimed is:

1. A gasification-based multi-generation apparatus, comprising:
a gasification system configured to generate a raw syngas feed from a carbon-based feedstock and comprising a gasification plant or facility;
an acid gas removal system in fluid communication with the gasification system configured to remove acidic contaminants from the raw syngas feed to thereby provide a treated syngas feed and comprising an acid gas removal plant or facility;
an oxygen feed in fluid communication with the gasification system;
a condensate polishing plant or facility configured to produce first and second polished cold condensate streams; and
a sour water stripping plant configured to produce an overhead stream and a bottom stream;
wherein the acid gas removal system comprises an acid gas contaminant absorber, a solvent regenerator, a contaminant hydrolysis reactor, and an acid gas removal system energy management system,
wherein the gasification system comprises a gasification reactor and a gasification system energy management system, the gasification system energy management system comprising:
a first gasification system process-to-process heat exchanger unit positioned to receive the first polished cold condensate stream and the overhead stream to add a thermal load to the first polished cold condensate stream and to cool the overhead stream,
a second gasification system process-to-process heat exchanger unit positioned to receive the thermally loaded polished cold condensate stream and to receive at least a portion of the oxygen feed to the gasification reactor to provide heat energy to the at least a portion of the oxygen feed and to remove at least a portion of the added thermal load added to the polished cold condensate stream,

wherein the acid gas removal system energy management system comprises a first acid gas removal system process-to-process heat exchanger unit positioned to receive the second polished cold condensate stream to provide heat energy to the at least a portion of the polished cold condensate stream,
wherein the acid gas removal plant or facility is integrated with the condensate polishing plant or facility through the at least a portion of the polished cold condensate stream received by the acid gas removal system process-to-process heat exchanger unit.

2. The apparatus as defined in claim 1 ,
wherein the gasification system energy management system comprises:
a third gasification system process-to-process heat exchanger unit positioned to receive the bottom stream and to receive at least a portion of the oxygen feed to provide heat energy to the portion of the oxygen feed and to cool the bottom stream; and
a fourth gasification system process-to-process heat exchanger unit positioned to receive a hot condensate stream and the oxygen feed to provide heat energy to heat the oxygen feed and to cool the hot condensate stream.

3. The apparatus as defined in claim 2 ,
wherein the at least a portion of an oxygen feed to the gasification reactor received by the second gasification system process-to-process heat exchanger unit comprises a first branch of the oxygen feed.

4. The apparatus as defined in claim 2 ,
wherein the acid gas removal system energy management system comprises:
a second acid gas removal system process-to-process heat exchanger unit positioned to receive a reactor effluent bottom stream from the contaminant hydrolysis reactor and at least a portion of a rich solvent bottom stream from the acid gas contaminant absorber to provide heat energy to the rich solvent bottom stream and to cool the reactor effluent bottom stream; and
a third acid gas removal system process-to-process heat exchanger unit positioned to receive at least a portion of a polished cold condensate stream received from the condensate polishing plant or facility, and a solvent regenerator top stream from the solvent regenerator to provide heat energy to the at least a portion of the polished cold condensate stream and to cool the solvent regenerator top stream.

5. The apparatus as defined in claim 4 ,
wherein the acid gas removal plant or facility comprises a reaction section containing a contaminant hydrolysis reactor and a separation section containing an acid gas contaminant absorber and the solvent regenerator,
wherein the reaction section and the separation section are both located in a same plot plan, adjacent to each other in a same process area, and
wherein the first and second acid gas removal system process-to-process heat exchanger units are located in the reaction section, and the third acid gas removal system process-to-process heat exchanger unit is located in the separation section of the acid gas removal plant or facility.

6. The apparatus as defined in claim 4 ,
wherein the acid gas removal plant or facility comprises a reaction section containing a contaminant hydrolysis reactor and a separation section containing an acid gas contaminant absorber and the solvent regenerator,
wherein the reaction section and the separation section are both located in different plot plans and in different process areas, and
wherein the first, second and third acid gas removal system process-to-process heat exchanger units are located in the separation section of the acid gas removal plant or facility.

7. The apparatus as defined in claim 4 ,
wherein the gasification plant or facility comprises a soot scrubber configured to provide the raw syngas feed to the contaminant hydrolysis reactor,
wherein the at least a portion of an oxygen feed to the gasification reactor received by the second gasification system process-to-process heat exchanger unit comprises a first branch of the oxygen feed,
wherein the at least a portion of an oxygen feed to the gasification reactor received by the third gasification system process-to-process heat exchanger unit comprises a second branch of the oxygen feed,
wherein the acid gas removal system energy management system comprises:
a fourth acid gas removal system process-to-process heat exchanger unit positioned to receive the hot condensate stream from the fourth gasification system process-to-process heat exchanger unit en route to the condensate polishing plant or facility, and the raw syngas feed from the soot scrubber to provide heat energy to the raw syngas feed and to cool the hot condensate stream;
fifth acid gas removal system process-to-process heat exchanger unit positioned to receive the hot condensate stream at least partially cooled by the fourth acid gas removal system process-to-process heat exchanger unit, and a demineralized water stream to provide heat energy to the demineralized water stream to provide boiler water feed to the gasification plant or facility, and to further cool the hot condensate stream;
an acid gas removal system cooling utility unit positioned to receive the hot condensate stream at least partially cooled by the first and fifth acid gas removal system process-to-process heat exchanger units to further cool the hot condensate stream to a preselected temperature for collection in a condensate collection tank; and
a sixth acid gas removal system process-to-process heat exchanger unit positioned to receive the demineralized water stream and a lean solvent bottom stream from the solvent regenerator to provide heat energy to the demineralized water stream and to cool the lean solvent bottom stream.

8. The apparatus of claim 7 ,
wherein the acid gas removal plant or facility comprises a reaction section containing a contaminant hydrolysis reactor and a separation section containing an acid gas contaminant absorber and the solvent regenerator,
wherein the reaction section and the separation section are both located in a same plot plan, adjacent to each oth

Assignees

• Saudi Arabian Oil Co

Inventors

• Noureldin Mahmoud Bahy

Classifications

• C10J3/00 Primary

  Production of combustible gases containing carbon monoxide from solid carbonaceous fuels (destructive distillation processes C10B) · CPC title

• C10J3/72

  Other features · CPC title

• F01K25/10

  the vapours being cold, e.g. ammonia, carbon dioxide, ether · CPC title

• C10J2300/1892

  with one stream being water/steam · CPC title

• C10J2300/169

  with water treatments · CPC title