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Use of Tube Sheet in ITM Oxygen Vessels

IP.com Disclosure Number: IPCOM000032959D
Publication Date: 2004-Nov-19
Document File: 2 page(s) / 32K

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The IP.com Prior Art Database

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Use of Tube Sheet in ITM Oxygen Vessels

Oxygen can be recovered from air at high temperatures by passing hot, oxygen-containing gas, preferably air, over non-porous, mixed conducting ceramic membranes.  These membranes, known in the art generically as ion transport membranes (ITMs), utilize an oxygen partial pressure differential across the membrane to cause oxygen ions to migrate through the membrane.

Membranes can be fabricated as tubes or flat plates that are arranged in modules for efficient contact with the hot compressed air.  High-purity oxygen permeate and nitrogen-enriched non-permeate products are withdrawn from the modules.  A comprehensive review of ion transport membranes is given by J. D. Wright and R. J. Copeland in Report No. TDA-GRI-90/0303 prepared for the Gas Research Institute, September 1990. 

A tube sheet can be used to support ITM Oxygen modules in an ITM Oxygen membrane separation vessel.  The modules can be supported below by the flat tube sheet, which is fixtured with multiple ports for making ceramic-metal seals to the modules.  The underside of the tubesheet is welded or otherwise fixed to an enclosure to make a leak-tight header that is the common oxygen header for all modules.  The header can penetrate the vessel wall for product withdrawal.

As depicted in Figure 1, the prototypical tube sheet/header design is a half-pipe, with the tube sheet serving as the flat side of the half pipe.  The modules are installed on top of the half-pipe, a...