USE OF HYDRAULIC TURBOCHARGER FOR RECOVERING ENERGY FROM HIGH PRESSURE SOLVENTS IN GASIFICATION AND NATURAL GAS APPLICATIONS
First Claim
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1. A process for treating a carbon dioxide and/or hydrogen sulfide containing gas comprising:
- a) sending a feed gas containing carbon dioxide and hydrogen sulfide through a carbon dioxide and/or hydrogen sulfide absorber unit containing a lean solvent to produce a loaded solvent containing a majority of said carbon dioxide and/or hydrogen sulfide from said feed gas and a treated gas;
b) regenerating said loaded solvent in a carbon dioxide and or hydrogen sulfide removal system; and
c) recovering energy from at least one solvent stream to boost pressure of at least one other solvent stream wherein at least one hydraulic turbocharger is used to recover said energy wherein said energy is recovered in a form of electricity.
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Abstract
The invention provides a process and system for regenerating a solvent used to remove carbon dioxide from feed gases, such as natural gas and synthesis gas. The invention employs one or more hydraulic turbochargers to transfer energy from a higher energy solvent stream to a lower energy solvent stream. This energy is converted to electricity for use in powering parts of the process and system. This provides for a significant reduction in operating expenses.
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13 Claims
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1. A process for treating a carbon dioxide and/or hydrogen sulfide containing gas comprising:
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a) sending a feed gas containing carbon dioxide and hydrogen sulfide through a carbon dioxide and/or hydrogen sulfide absorber unit containing a lean solvent to produce a loaded solvent containing a majority of said carbon dioxide and/or hydrogen sulfide from said feed gas and a treated gas; b) regenerating said loaded solvent in a carbon dioxide and or hydrogen sulfide removal system; and c) recovering energy from at least one solvent stream to boost pressure of at least one other solvent stream wherein at least one hydraulic turbocharger is used to recover said energy wherein said energy is recovered in a form of electricity. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for treating a carbon dioxide containing gas comprising a carbon dioxide absorber unit containing a lean solvent to produce a loaded solvent containing a majority of said carbon dioxide from carbon dioxide containing gas and a treated gas;
- a carbon dioxide removal system and at least one hydraulic turbocharger is used to recover energy from at least one solvent stream and the energy is then converted to electricity.
- View Dependent Claims (9, 10, 11, 12, 13)
Specification