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Integrated Air Booster and Oxygen Compressor for Partial Pumped LOX Cryogenic Air Separation Process Cycle

IP.com Disclosure Number: IPCOM000019372D
Publication Date: 2003-Sep-12
Document File: 3 page(s) / 66K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a new configuration for an integrally-geared type centrifugal compressor in which, when applied with partial pumped liquid oxygen (LOX) and similar cryogenic air separation process cycles, combines on a single compressor frame the duties for compression of the air steam utilized to boil the effluent liquid oxygen and compression of that effluent oxygen stream. The new combined compression configuration has some or all of the following advantages: 1) A single compressor frame is utilized for both duties, and therefore, a cost savings can be realized, 2) Site space savings also may be realized, 3) Aerodynamically, the matching of the compression duties in this prescribed configuration can be more energy efficient as compared to other compression configurations, and 4) Mechanically this configuration allows better matching of the rotating components, including the gearing, as compared to other configurations.

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Integrated Air Booster and Oxygen Compressor for

Partial Pumped LOX Cryogenic Air Separation Process Cycle

Disclosed is a new configuration for an integrally-geared type centrifugal compressor in which, when applied with partial pumped liquid oxygen (LOX) and similar cryogenic air separation process cycles, combines on a single compressor frame the duties for compression of the air steam utilized to boil the effluent liquid oxygen and compression of that effluent oxygen stream. The new combined compression configuration has some or all of the following advantages: 1) A single compressor frame is utilized for both duties, and therefore, a cost savings can be realized, 2) Site space savings also may be realized, 3) Aerodynamically, the matching of the compression duties in this prescribed configuration can be more energy efficient as compared to other compression configurations, and 4) Mechanically this configuration allows better matching of the rotating components, including the gearing, as compared to other configurations.

Figure 1 schematically shows a typical partial pumped LOX air separation unit with the new integrally-geared type centrifugal compressor (C) configuration concept with booster air compression and oxygen compression on the same frame. The schematic depicts a typical example with a two pinion arrangement with two stages of booster air compression, (CA1) and (CA2), on one pinion, and two stages of gaseous oxygen compression, (CO1) and (CO2), on the second pinion. The configuration of staging is not limited to the exact arrangement shown in Figure 1. Depending on the product oxygen delivery pressure requirements and process cycle conditions various combinations of one (1) to three (3) stages of booster air compression and oxygen compression can be arranged utilizing the four stations available on the frame for centrifugal compressor stages. Furthermore, a three pinion integrally-geared type centrifugal compressor could be designed for the combined duty application and additional flexibility for staging arrangements utilizing the six available stage stations are possible.

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