Integrated chilling of process air compression in ammonia plants utilizing direct and indirect chilling from the ammonia compression train of the plant followed by air flow split and multistage air preheating to the secondary ammonia reformer
OwnerVinod Kumar Arorainventor
Life of this patent
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Abstract
An improved performance ammonia plant system utilizing both a direct and indirect chilling of the compressed process air train using a single or multistage chilling system integrated with the ammonia plant ammonia compression train to increase process air flow to the secondary ammonia reformer of the ammonia plant.
Claims16
A method for improving the performance of an ammonia plant utilizing a direct integrated chilling system in an ammonia plant air compression train to increase process air flow to a secondary reformer of the ammonia plant, the method comprising:
- providing a single integrated suction air chiller in the ammonia plant air compression train for chilling incoming air by heat exchange with compressed liquid ammonia;
- supplying the compressed liquid ammonia from the ammonia plant ammonia compression train to the single integrated suction air chiller;
- expanding the compressed liquid ammonia to an expanded ammonia vapor in the single integrated suction air chiller to provide chilling of the air;
- and
- returning all of the expanded ammonia vapor to the ammonia plant ammonia compression train to be integrated for recompression and cooling back to liquid ammonia.
An ammonia plant utilizing a direct integrated chilling system in an ammonia plant air compression train of the ammonia plant to increase process air flow to a secondary reformer of the ammonia plant, comprising:
- a single integrated suction air chiller in the ammonia plant air compression train that chills incoming air by heat exchange with compressed liquid ammonia from an ammonia plant ammonia compression train of the ammonia plant and returns all of an expanded ammonia vapor to the ammonia plant ammonia compression train to be integrated for recompression and cooling back to liquid ammonia.
A method for improving the performance of an ammonia plant utilizing an indirect integrated chilling system in an ammonia plant air compression train to increase process air flow to a secondary reformer of the ammonia plant, the method comprising:
- providing a single integrated suction air chiller in the ammonia plant air compression train for chilling incoming air by heat exchange with chilled water;
- providing a staged water chiller for chilling water for the single integrated suction air chiller by heat exchange with compressed liquid ammonia from the ammonia plant ammonia compression train
- supplying the compressed liquid ammonia from the ammonia plant ammonia compression train to the staged water chiller;
- expanding the compressed liquid ammonia to an expanded ammonia vapor in the single staged water chiller to provide chilling of the water;
- returning all of the expanded ammonia vapor to the ammonia plant ammonia compression train to be integrated for recompression and cooling back to liquid ammonia.
An ammonia plant utilizing an indirect multistage chilling system in an ammonia plant air compression train of the ammonia plant to increase process air flow to a secondary ammonia reformer of the ammonia plant, comprising:
- a single integrated suction air chiller in the ammonia plant air compression train that chills incoming process air by heat exchange with chilled water from the ammonia plant ammonia compression train;
- a staged water chiller that chills water for the ammonia plant air compression train by heat exchange with expanded compressed ammonia from the ammonia plant ammonia compression train and returns the expanded ammonia vapor to the ammonia plant ammonia compression train to be integrated for recompression and cooling back to liquid ammonia.
Dependencies are inferred from the claim text.