Refining assemblies and refining methods for rich natural gas
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C10L-003/10
B01J-008/02
C10L-003/08
출원번호
US-0937629
(2015-11-10)
등록번호
US-9777237
(2017-10-03)
발명자
/ 주소
Edlund, David J
출원인 / 주소
Element 1 Corp.
대리인 / 주소
Kolisch Hartwell, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
93
초록▼
Refining assemblies and methods for refining rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas are disclosed. In some embodiments, the assemblies may include a methane-producing assembly configured to receive at least one liquid-containing feed
Refining assemblies and methods for refining rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas are disclosed. In some embodiments, the assemblies may include a methane-producing assembly configured to receive at least one liquid-containing feed stream that includes water and rich natural gas and to produce an output stream therefrom by (a) converting at least a substantial portion of the other hydrocarbons of the rich natural gas with the water to a second methane gas, a lesser portion of the water, and other gases, and (b) allowing at least a substantial portion of the first methane gas from the rich natural gas to pass through the methane-producing assembly unconverted. The assemblies may additionally include a purification assembly configured to receive the output stream and to produce a methane-rich stream therefrom having a greater methane concentration than the output stream.
대표청구항▼
1. A refining assembly for rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas, comprising: a methane-producing assembly configured to receive at least one liquid-containing feed stream that includes water and rich natural gas and to produce an ou
1. A refining assembly for rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas, comprising: a methane-producing assembly configured to receive at least one liquid-containing feed stream that includes water and rich natural gas and to produce an output stream therefrom by (a) converting at least a substantial portion of the other hydrocarbons of the rich natural gas with the water to a second methane gas, a lesser portion of the water, and other gases, and (b) allowing at least a substantial portion of the first methane gas from the rich natural gas to pass through the methane-producing assembly unconverted;a purification assembly configured to receive the output stream and to produce a methane-rich stream therefrom having a greater methane concentration than the output stream;a feedstock delivery system configured to (1) deliver the at least one liquid-containing feed stream to the methane-producing assembly, (2) deliver a rich natural gas slip stream to the methane-rich stream to produce a product methane stream therefrom, and (3) adjust flowrate of the rich natural gas slip stream to the methane-rich stream based, at least in part, on at least one measured characteristic of the product methane stream such that the product methane stream has at least one of a minimum heating value or a minimum methane number. 2. A refining assembly for rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas, comprising: a methane-producing assembly configured to receive at least one liquid-containing feed stream that includes water and rich natural gas and to produce an output stream therefrom by (a) converting at least a substantial portion of the other hydrocarbons of the rich natural gas with the water to a second methane gas, a lesser portion of the water, and other gases, and (b) allowing at least a substantial portion of the first methane gas from the rich natural gas to pass through the methane-producing assembly unconverted; anda purification assembly configured to receive the output stream and to produce a methane-rich stream therefrom having a greater methane concentration than the output stream, wherein the methane-producing assembly includes:a vaporizer configured to receive and vaporize at least a portion of the at least one liquid-containing feedstream that includes water and rich natural gas to form an at least substantially vaporized stream;a methane-producing reactor containing a catalyst and configured to receive the at least substantially vaporized stream and to produce the output stream by (a) converting at least a substantial portion of the other hydrocarbons with the water to the second methane gas, a lesser portion of the water, and the other gases and (b) allowing at least a substantial portion of the first methane gas from the rich natural gas to pass through the methane-producing reactor unconverted; anda heating assembly configured to produce a heated exhaust stream for heating at least one of the vaporizer to at least a minimum vaporization temperature or the methane-producing reactor to at least a minimum methane-producing temperature, and wherein the heating assembly is configured to adjust temperature of the heated exhaust stream based, at least in part, on at least one measured characteristic of the product methane stream such that the product methane stream has at least one of a minimum heating value or a minimum methane number. 3. A refining assembly for rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas, comprising: a methane-producing assembly configured to receive at least one liquid-containing feed stream that includes water and rich natural gas and to produce an output stream therefrom by (a) converting at least a substantial portion of the other hydrocarbons of the rich natural gas with the water to a second methane gas, a lesser portion of the water, and other gases, and (b) allowing at least a substantial portion of the first methane gas from the rich natural gas to pass through the methane-producing assembly unconverted;a purification assembly configured to receive the output stream and to produce a methane-rich stream therefrom having a greater methane concentration than the output stream, where the output stream includes water vapor, wherein the purification assembly includes at least one gas dryer configured to remove at least a substantial portion of the water vapor from the output stream to produce an at least substantially dried stream, and wherein the purification assembly includes: at least one synthetic natural gas (SNG) reactor containing a catalyst and configured to convert at least a portion of the carbon oxide gas and at least a portion of the hydrogen gas in the at least substantially dried stream to methane gas, and to produce the methane-rich stream therefrom, anda heating assembly configured to produce a heated exhaust stream for heating the at least one SNG reactor to a minimum conversion temperature; anda feedstock delivery system configured to deliver (1) the at least one liquid-containing feed stream to the methane-producing assembly and (2) a rich natural gas slip stream to the methane-rich stream to produce a product methane stream therefrom. 4. The refining assembly of claim 3, wherein the feedstock delivery system is configured to adjust flowrate of the rich natural gas slip stream to the methane-rich stream based, at least in part, on at least one measured characteristic of the product methane stream such that the product methane stream has at least one of a minimum heating value or a minimum methane number. 5. A method of refining rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas, comprising: converting at least a substantial portion of the other hydrocarbons of the rich natural gas with water to an output stream containing a second methane gas, a lesser portion of the water, hydrogen gas, and carbon oxide gas, wherein converting at least a substantial portion of the other hydrocarbons includes not converting at least a substantial portion of the first methane gas from the rich natural gas;removing at least a portion of the water from the output stream to produce an at least substantially dried stream therefrom;converting at least a portion of the carbon oxide gas and at least a portion of the hydrogen gas from the at least substantially dried stream to methane gas to form an intermediate stream therefrom containing a lower concentration of hydrogen gas and carbon oxide gas compared to the at least substantially dried stream;separating, from the intermediate stream, at least a portion of the carbon oxide gas to form a byproduct stream therefrom, wherein the remaining portion of the intermediate stream forms at least part of a methane-rich stream having a greater methane concentration than the intermediate stream, wherein converting at least a substantial portion of the other hydrocarbons of the rich natural gas with water includes heating the rich natural gas and the water;measuring at least one characteristic of the product methane stream; andadjusting temperature of the heated rich natural gas and water based, at least in part, on at least one measured characteristic of the product methane stream such that the product methane stream has at least one of a minimum heating value or a minimum methane number. 6. A method of refining rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas, comprising: converting at least a substantial portion of the other hydrocarbons of the rich natural gas with water to an output stream containing a second methane gas, a lesser portion of the water, hydrogen gas, and carbon oxide gas, wherein converting at least a substantial portion of the other hydrocarbons includes not converting at least a substantial portion of the first methane gas from the rich natural gas;removing at least a portion of the water from the output stream to produce an at least substantially dried stream therefrom;converting at least a portion of the carbon oxide gas and at least a portion of the hydrogen gas from the at least substantially dried stream to methane gas to form an intermediate stream therefrom containing a lower concentration of hydrogen gas and carbon oxide gas compared to the at least substantially dried stream;separating, from the intermediate stream, at least a portion of the carbon oxide gas to form a byproduct stream therefrom, wherein the remaining portion of the intermediate stream forms at least part of a methane-rich stream having a greater methane concentration than the intermediate stream; andblending a slip stream of rich natural gas with the methane-rich stream to form a product methane stream therefrom. 7. The method of claim 6, wherein blending a slip stream of rich natural gas includes: measuring at least one characteristic of the product methane stream; andadjusting flowrate of the slip stream of rich natural gas based, at least in part, on at least one measured characteristic of the product methane stream such that the product methane stream has at least one of a minimum heating value or a minimum methane number. 8. A refining assembly for rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas, comprising: a vaporizer configured to receive and vaporize at least a portion of at least one liquid-containing feedstream that includes water and rich natural gas to form an at least substantially vaporized stream;a methane-producing reactor containing a catalyst and configured to receive the vaporized feed stream and to produce an output stream by (a) converting at least a substantial portion of the other hydrocarbons with the water to a second methane gas, a lesser portion of the water, hydrogen gas, and carbon oxide gas, and (b) allowing at least a substantial portion of the first methane gas from the rich natural to pass through the methane-producing reactor unconverted;a first heating assembly configured to receive at least one fuel stream and at least one air stream and produce a heated exhaust stream for heating at least one of the vaporizer to at least a minimum vaporization temperature or the methane-producing reactor to at least a minimum methane-producing temperature;a purification assembly configured to receive the output stream and to produce a methane-rich stream therefrom having a greater methane concentration than the output stream;a feedstock delivery system configured to (1) deliver the at least one liquid-containing feed stream to the vaporizer, (2) deliver a rich natural gas slip stream to the methane-rich stream to produce a product methane stream therefrom, and (3) adjust flowrate of the rich natural gas slip stream to the methane-rich stream based, at least in part, on at least one measured characteristic of the product methane stream such that the product methane stream has at least one of a minimum heating value or a minimum methane number. 9. A refining assembly for rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas, comprising: a vaporizer configured to receive and vaporize at least a portion of at least one liquid-containing feedstream that includes water and rich natural gas to form an at least substantially vaporized stream;a methane-producing reactor containing a catalyst and configured to receive the vaporized feed stream and to produce an output stream by (a) converting at least a substantial portion of the other hydrocarbons with the water to a second methane gas, a lesser portion of the water, hydrogen gas, and carbon oxide gas, and (b) allowing at least a substantial portion of the first methane gas from the rich natural to pass through the methane-producing reactor unconverted;a first heating assembly configured to receive at least one fuel stream and at least one air stream and produce a heated exhaust stream for heating at least one of the vaporizer to at least a minimum vaporization temperature or the methane-producing reactor to at least a minimum methane-producing temperature; anda purification assembly configured to receive the output stream and to produce a methane-rich stream therefrom having a greater methane concentration than the output stream, wherein the purification assembly includes at least one of a gas dryer or a water knockout device configured to remove at least a substantial portion of water from the output stream to produce an at least substantially dried stream, wherein the purification assembly includes: at least one synthetic natural gas (SNG) reactor containing a catalyst and configured to convert at least a portion of the carbon oxide gas and at least a portion of the hydrogen gas in the at least substantially dried stream to methane gas, and to produce the methane-rich stream therefrom, anda second heating assembly configured to produce a heated exhaust stream for heating the at least one SNG reactor to a minimum conversion temperature; anda feedstock delivery system configured to deliver (1) the at least one liquid-containing feed stream to the vaporizer and (2) a rich natural gas slip stream to the methane-rich stream to produce a product methane stream therefrom. 10. The refining assembly of claim 9, wherein the feedstock delivery system is configured to adjust flowrate of the rich natural gas slip stream to the methane-rich stream based, at least in part, on at least one measured characteristic of the product methane stream such that the product methane stream has at least one of a minimum heating value or a minimum methane number. 11. A method of refining rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas, comprising: converting at least a substantial portion of the other hydrocarbons of the rich natural gas with water to an output stream containing a second methane gas, a lesser portion of the water, hydrogen gas, and carbon oxide gas, wherein converting at least a substantial portion of the other hydrocarbons includes not converting at least a substantial portion of the first methane gas from the rich natural gas;removing at least a portion of the water from the output stream to produce an at least substantially dried stream therefrom;converting at least a portion of the carbon oxide gas and at least a portion of the hydrogen gas from the at least substantially dried stream to methane gas to form a methane-rich stream having a greater methane concentration than the intermediate stream, wherein converting at least a substantial portion of the other hydrocarbons of the rich natural gas with water includes heating the rich natural gas and the water;measuring at least one characteristic of the product methane stream; andadjusting temperature of the heated rich natural gas and water based, at least in part, on at least one measured characteristic of the product methane stream such that the product methane stream has at least one of a minimum heating value or a minimum methane number. 12. A method of refining rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas, comprising: converting at least a substantial portion of the other hydrocarbons of the rich natural gas with water to an output stream containing a second methane gas, a lesser portion of the water, hydrogen gas, and carbon oxide gas, wherein converting at least a substantial portion of the other hydrocarbons includes not converting at least a substantial portion of the first methane gas from the rich natural gas;removing at least a portion of the water from the output stream to produce an at least substantially dried stream therefrom;converting at least a portion of the carbon oxide gas and at least a portion of the hydrogen gas from the at least substantially dried stream to methane gas to form a methane-rich stream having a greater methane concentration than the intermediate stream;blending a slip stream of rich natural gas with the methane-rich stream to form a product methane stream therefrom. 13. The method of claim 12, wherein blending a slip stream of rich natural gas includes: measuring at least one characteristic of the product methane stream; andadjusting flowrate of the slip stream of rich natural gas based, at least in part, on the measured characteristic.
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