Michael J Sinicropi

US Patent:

6344069, Feb 5, 2002

Filed:

Jan 4, 2001

Appl. No.:

09/753612

Inventors:

James Smolarek - Boston NY
Michael John Sinicropi - Cheektowaga NY
Herbert Raymond Schaub - East Amherst NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

B01D 53047

US Classification:

95 96, 95101, 95102, 95130

Abstract:

A VPSA apparatus includes a first adsorbent bed and a second adsorbent bed, a feed blower for providing a flow of a gas mixture at about atmospheric pressure to the beds, and a vacuum blower for removing a flow of gas therefrom and venting the gas to a space at atmospheric pressure. The VPSA process causes the first adsorbent bed to be poised for evacuation by the vacuum blower and concurrently, the second adsorbent bed is under vacuum conditions and is poised for pressurization by the feed blower. A single motor is coupled by a common shaft to both the feed blower and the vacuum blower and operates both. A conduit/valve arrangement is operative during at least a portion of a process time when the adsorbent beds are in pressurizing/evacuation states, respectively, to couple the feed blower to the second adsorbent bed when at vacuum and for concurrently coupling the vacuum blower to the first adsorbent bed which is to be evacuated. The feed blower is thereby caused to operate in a gas expansion mode and imparts expansion energy, via the common shaft, to the vacuum blower. During idling conditions, a valve-conduit system is controlled to enable significant reductions in pressure rise across the feed and vacuum blowers.

US Patent:

6425264, Jul 30, 2002

Filed:

Aug 16, 2001

Appl. No.:

09/930199

Inventors:

Kenneth Kai Wong - Amherst NY
Richard A. Novak - Naperville IL
Michael John Sinicropi - New Milford CT
Dante Patrick Bonaquist - Grand Island NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

F25J 100

US Classification:

62613, 62434, 62619

Abstract:

A cryogenic refrigeration system wherein refrigeration is provided to a heat load by a warming multicomponent refrigerant fluid recirculating in a refrigeration circuit and by cryogenic liquid separately provided to the heat load in direct or indirect heat exchange with the heat load.

US Patent:

54531128, Sep 26, 1995

Filed:

Feb 2, 1994

Appl. No.:

8/190426

Inventors:

Michael J. Sinicropi - Cheektowaga NY
Timothy M. Aaron - Williamsville NY
Frederick W. Leavitt - Amherst NY
Herbert R. Schaub - E. Amherst NY
James Smolarek - Boston NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

B01D 53047

US Classification:

95 41

Abstract:

Waste heat generated within a pressure swing adsorption system is effectively captured and utilized to preheat the feed gas passing to a feed gas blower for compression to the desired adsorption pressure level. The energy efficiency of the system, and overall system performance, are thereby enhanced.

US Patent:

59124261, Jun 15, 1999

Filed:

Jan 30, 1997

Appl. No.:

8/791308

Inventors:

James Smolarek - Boston NY
Michael John Sinicropi - Cheektowaga NY
Herbert Raymond Schaub - East Amherst NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

B01D 53047

US Classification:

96115

Abstract:

A VPSA apparatus includes a first adsorbent bed and a second adsorbent bed, a feed blower for providing a flow of a gas mixture at about atmospheric pressure to the beds, and a vacuum blower for removing a flow of gas therefrom and venting the gas to a space at atmospheric pressure. The VPSA process causes the first adsorbent bed to be poised for evacuation by the vacuum blower and concurrently, the second adsorbent bed is under vacuum conditions and is poised for pressurization by the feed blower. A single motor is coupled by a common shaft to both the feed blower and the vacuum blower and operates both. A conduit/valve arrangement is operative during at least a portion of a process time when the adsorbent beds are in pressurizing/evacuation states, respectively, to couple the feed blower to the second adsorbent bed when at vacuum and for concurrently coupling the vacuum blower to the first adsorbent bed which is to be evacuated. The feed blower is thereby caused to operate in a gas expansion mode and imparts expansion energy, via the common shaft, to the vacuum blower. During idling conditions, a valve-conduit system is controlled to enable significant reductions in pressure rise across the feed and vacuum blowers.