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US 2016/0236137 A1Published application
A multi-compression system and process for capturing carbon dioxide
AssigneeReliance Industries Limited
InventorsVinay Amte, Asit Kumar Das, Surajit Sengupta, Manoj Yadav, Sukumar Mandal, Alok Pal, Ajay Gupta, Ramesh Bhujade, Satyanarayana Reddy Akuri, Rajeshwer Dongara
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Abstract
The present disclosure provides a multiple-compression system and a process for capturing carbon dioxide (CO2) from a flue gas stream containing CO2 The disclosure also provides a process for regeneration of the carbon dioxide capture media.
Claims20
A multi-compression process for capturing carbon dioxide (CO2) from a flue gas stream containing CO2;
- said process comprising the following steps:
- i. directing the flow of the flue gas stream through a first blower to obtain a pressurized flue gas stream with elevated temperature;
- ii. extracting the heat from the pressurized flue gas stream in a first heat exchanger using circulating thermic fluid to obtain a heated thermic fluid and a cooled pressurized flue gas stream;
- iii. directing the cooled pressurized flue gas stream to a CO2 adsorber;
- iv. passing in the adsorber a fluidized lean CO2 capture media to generate a stream comprising rich capture media and flue gas devoid of CO2;
- v. separating in a first cyclone said rich capture media and said stream of flue gas devoid of CO2;
- vi. directing the separated stream of flue gas devoid of CO2 to a stack for further treatment;
- vii. leading said separated rich capture media to a second heat exchanger where it is heated to near regeneration temperature, at least partially, using said heated circulating thermic fluid to obtain a heated rich capture media;
- viii. feeding said heated rich capture media to a desorber;
- ix. heating the heated rich capture media in the desorber with the help of circulating heated non-thermic fluid to desorb CO2 from the heated rich capture media to generate hot lean capture media and CO2 gas and optionally using a part of the generated CO2 gas for fluidization of the heated rich capture media in the desorber;
- x. separating CO2 gas from the hot and lean capture media;
- xi. circulating the heated non-thermic fluid through the desorber by the thermosyphon principle by heating the non-thermic fluid using external waste heat in a fourth heat exchanger to generate a vapor-liquid mixture, separating said vapor-liquid mixture in a vapor-liquid separator, further heating the separated liquid phase non-thermic fluid using the heated thermic fluid in a fifth heat exchanger, converging the vapors emanating from the fifth heat exchanger and the vapors directed from the vapor-liquid separator in a converger, further pressurizing and heating using a booster compressor and thereafter cooling by expanding the non-thermic fluid exiting the desorber through an expander and leading the non-thermic fluid to the fourth heat exchanger to reiterate the cycle;
- and
- xii. cooling the separated hot and lean capture media in a third heat exchanger to obtain cooled lean capture media using the circulating thermic fluid for adsorption in the adsorber for reiteration of the process.
11 more elements
A multi-compression system for capturing carbon dioxide (CO2) from a flue gas stream containing CO2, said system comprising:
- i. a first blower adapted to receive the flue gas stream and pressurize said flue gas stream to generate a pressurized flue gas stream with elevated temperature;
- ii. a first heat exchanger adapted to receive said pressurized flue gas stream and thermic fluid and transfer heat from said pressurized flue gas stream to said thermic fluid to obtain heated thermic fluid and a cooled pressurized flue gas stream;
- iii. an adsorber adapted to receive said cooled pressurized flue gas stream, fluidized cool and lean capture media and cooled lean capture media emerging from a third heat exchanger, said capture media adapted to adsorb CO2 to generate a rich capture media and a stream of flue gas devoid of CO2;
- iv. a second heat exchanger to receive said rich capture media and heat, by heated thermic fluid received from the first heat exchanger and from the third heat exchanger, said rich capture media to near a predefined regeneration temperature, to obtain a heated rich capture media;
- v. a desorber adapted to receive said heated rich capture media and further heat said heated rich capture media to desorb CO2 to generate a hot and lean capture media and CO2 gas;
- vi. a third heat exchanger adapted to cool said hot and lean capture media to generate cooled lean capture media for the adsorption in said adsorber;
- vii. a thermic fluid circulating system adapted to circulate said thermic fluid through said first heat exchanger, said second heat exchanger, said third heat exchanger, a fifth heat exchanger and a sixth heat exchanger;
- viii. a non-thermic fluid circulating system adapted to circulate non-thermic fluid through said desorber;
- ix. a vapor-liquid separator adapted to receive a vapor liquid mixture from a fourth heat exchanger and separate the vapor and liquid phases of non-thermic fluid;
- x. a fifth heat exchanger adapted to receive the liquid phase of the non-thermic fluid from the vapor-liquid separator and vaporize said liquid phase;
- xi. a converger adapted to converge the vapors emanating from the fifth heat exchanger and the vapors directed from the vapor-liquid separator and direct the combined vapors of the non-thermic fluid to a booster compressor;
- xii. the booster compressor, on-line in the non-thermic fluid circulating system, adapted to compress and heat the combined vapors of the non-thermic fluid before being fed to the desorber;
- xiii. an expander, on-line in the non-thermic fluid circulating system, adapted to depressurize and cool said non-thermic fluid exiting the desorber for being heated in the fourth heat exchanger using external waste heat;
- and
- xiv. the sixth heat exchanger adapted to receive thermic fluid from said second heat exchanger and cool said thermic fluid for supplying cool thermic fluid to said first and third heat exchanger.
12 more elements
Dependencies are inferred from the claim text.