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US 12,392,549 B2Granted
Gas stream component removal system and method
AssigneeChart Energy & Chemicals, Inc.
InventorDouglas A. Ducote, Jr.
Life of this patent
Estimating the term…
Abstract
A system for removing selected components from a gas stream has a heat exchanger including a first cooling passage configured to receive a feed gas stream and to provide a cooled feed gas stream. An expander receives at least a portion of the cooled feed gas stream. A separation device receives an expanded fluid stream from the expander and separates the expanded fluid stream into a liquid stream containing selected components and a purified vapor stream having a purified vapor temperature. A compressor receives the purified vapor stream at approximately the purified vapor temperature and produces a compressed vapor stream that is returned to the heat exchanger.
Claims35
A system for removing selected components from a gas stream comprising:
- a. a heat exchanger including a first cooling passage configured to receive a feed gas stream and to provide a cooled feed gas stream;
- b. an expander configured to receive at least a portion of the cooled feed gas stream;
- c. a separation device having a separation device vapor outlet, said separation device configured to receive an expanded fluid stream from the expander and to separate the expanded fluid stream into a liquid stream containing selected components and a purified vapor stream having a purified vapor temperature;
- and
- d. a compressor configured to receive the purified vapor stream directly from the separation device vapor outlet at approximately the purified vapor temperature and to produce a compressed vapor stream that is returned to the heat exchanger, wherein the compressed vapor stream is compressed to a pressure corresponding to a temperature that is approximately equal to a temperature of the cooled gas stream.
2 more elements
A system for liquefying a feed gas comprising:
- a. a heat exchanger having a first cooling passage and a second cooling passage, said first cooling passage configured to receive a feed gas stream at a feed gas stream temperature so that a cooled feed gas stream is formed;
- b. a mixed refrigerant compression system in communication with the heat exchanger and configured to cool the first and second cooling passages;
- c. a liquefied gas outlet line connected to an outlet of the second cooling passage;
- d. an expander configured to receive at least a portion of the cooled feed gas stream from the first cooling passage;
- e. a separation device having a separation device vapor outlet, said separation device configured to receive an expanded fluid stream from the expander and to separate the expanded fluid stream into a liquid stream containing selected components and a purified vapor stream having a purified vapor temperature;
- f. a compressor configured to receive the purified vapor stream directly from the separation device vapor outlet at approximately the purified vapor temperature and to produce a compressed vapor stream, wherein the compressed vapor stream is compressed to a pressure corresponding to a temperature that is approximately equal to a temperature of the cooled gas stream;
- g. said second cooling passage configured to receive and liquefy the compressed vapor stream;
- h. wherein the separation device includes a separation column having a separation section and a stripping section wherein the separation section is configured to receive the expanded fluid stream from the expander, direct liquid to the stripping section and direct the purified vapor stream to the compressor and wherein the liquid stream containing selected components exits the stripping section;
- and
- i. a stripping gas line configured to receive a vapor portion of the feed gas stream at the feed gas stream temperature and to direct the portion of the feed gas stream to the stripping section for use as a stripping gas.
7 more elements
A method for removing selected components from a gas stream comprising the steps of:
- a. cooling a feed gas stream to provide a cooled feed gas stream;
- b. expanding the cooled feed gas stream to provide an expanded gas stream;
- c. separating the expanded gas stream using a separation device having a separation device vapor outlet into a liquid stream containing selected components and a purified vapor stream having a purified vapor temperature;
- and
- d. compressing the purified vapor stream using a compressor after the compressor receives the purified vapor stream directly from the separation device vapor outlet at approximately the purified vapor temperature to provide a compressed vapor stream, wherein the compressed vapor stream is compressed to a pressure corresponding to a temperature that is approximately equal to a temperature of the cooled gas stream.
2 more elements
A method of liquefying a gas feed stream comprising the steps of:
- a. cooling a gas feed gas stream to provide a cooled feed gas stream;
- b. expanding the cooled feed gas stream to provide an expanded gas stream;
- c. separating the expanded gas stream using a separation device having a separation device vapor outlet into a liquid stream containing selected components and a purified vapor stream having a purified vapor temperature;
- d. compressing the purified vapor stream using a compressor after the compressor receives the purified vapor stream directly from the separation device vapor outlet at approximately the purified vapor temperature to provide a compressed vapor stream, wherein the compressed vapor stream is compressed to a pressure corresponding to a temperature that is approximately equal to a temperature of the cooled gas stream;
- and
- e. cooling the compressed vapor stream to form a liquefied gas stream.
3 more elements
Dependencies are inferred from the claim text.