System and method for cryogenic air separation using a booster loaded liquid turbine for expansion of a liquid air stream

Pending Publication Date: 2021-11-11
PRAXAIR TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]The portion of the compressed, pre-purified air stream received by the primary booster compressor in the present air separation unit and associated methods is preferably a boiler air stream comprising between about 25% to 45% by volume of the incoming compressed, pre-purified air stream. In some embodiments, the expanded air stream is directed to the higher pressu

Problems solved by technology

When used, such liquid turbines or dense phase turbines generally improve the performance of the air separation unit but involve additional capital costs for the liquid turbine, generator, and a

Method used

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  • System and method for cryogenic air separation using a booster loaded liquid turbine for expansion of a liquid air stream
  • System and method for cryogenic air separation using a booster loaded liquid turbine for expansion of a liquid air stream
  • System and method for cryogenic air separation using a booster loaded liquid turbine for expansion of a liquid air stream

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Example

[0017]With reference to FIG. 1, a prior art cryogenic air separation unit 10 employing a generator loaded liquid turbine 50 is illustrated. FIG. 2 and FIG. 4, on the other hand, illustrate embodiments of a cryogenic air separation unit 110, 210 employing a booster-loaded loaded liquid turbine 150, 250.

[0018]As many of the components and streams in the prior art cryogenic air separation unit having a generator loaded liquid turbine 50 are the same or similar to the present cryogenic air separation unit 110, 210 employing the booster-loaded loaded liquid turbines 150, 250, much of the following description is applicable to each of FIG. 1, FIG. 2, and FIG. 4 and the reference numerals identifying the similar components are the same in each of the drawings. The differences between the prior art cryogenic air separation unit of FIG. 1 having a generator loaded liquid turbine and the those of FIGS. 2 and 4 having booster-loaded loaded liquid turbines, will be highlighted, as appropriate.

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Abstract

A system and method for cryogenic air separation arrangement having a booster loaded liquid turbine for expansion of a liquid air stream or other fluid having liquid-like densities is provided. The disclosed booster loaded liquid turbines are relatively small to provide an aerodynamic and speed match between the turbine and the coupled gas compressor. The coupled gas compressor is a supplemental booster compressor and may be a dedicated warm booster compressor or alternatively a cold booster compressor.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of and priority to U.S. provisional patent application Ser. No. 63 / 020,045 filed May 5, 2020 the disclosure of which is incorporated by reference.TECHNICAL FIELD[0002]The present invention relates to a system and method of cryogenic air separation, and more particularly to cryogenic air separation that employs the use of a booster-loaded liquid turbine for the expansion of a liquid air stream and the associated recovery of work therefrom.BACKGROUND[0003]Liquid turbines or dense phase turbines are currently used in high pressure air separation units to extract work from the liquid air stream or supercritical air stream that has been condensed against boiling product oxygen or against some product nitrogen from the air separation unit. This air stream is typically compressed to elevated pressures in order to effectively boil the product(s) but is subsequently expanded prior to introduction to the distillat...

Claims

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Application Information

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IPC IPC(8): F25J1/00F25J3/04
CPCF25J1/0042F25J3/04387F25J3/04048F25J3/0406F25J3/04066F25J2240/20F25J3/04321F25J3/04412F25J3/04121F25J2240/12F25J3/04309F25J3/04024F25J3/0409F25J3/04296F25J2240/10F25J2245/40F25J3/04678F25J3/04812F25J3/04381F25J3/04054F25J2240/42F25J3/04866F25J2240/30F04D17/10F04D25/04
Inventor RAUCH, JEREMIAH J.COLMAN, EDWARD JOSEPHXU, ZHENGRONG
Owner PRAXAIR TECH INC
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