A cryogenic rectification method for increasing the recovery of argon produced in an argon column of a cryogenic air separation plant wherein liquid nitrogen is mixed with higher pressure column kettle liquid to produce a liquid refrigeration mixture to drive the top condenser.
Troy Michael Raybold - Orchard Park NY, US Raymond Francis Drnevich - Clarence NY, US James Patrick Meagher - Buffalo NY, US
Assignee:
Praxair Technology, Inc. - Danbury CT
International Classification:
F02C 3/28 F02C 6/18 F02C 7/224
US Classification:
60780, 60 3912, 60736, 60 39182
Abstract:
A method of generating electricity in synthesis gas in which a fuel is combusted in a gas turbine to generate the electricity that at least about 60 percent by volume is derived from a source independent of the synthesis gas. The synthesis gas is produced by reacting a hydrocarbon stream, by for example, partial oxidation, autothermal reforming or steam methane reforming. After the synthesis gas stream is cooled, heat is transferred from the heated synthesis gas stream to the fuel prior to combustion in the gas turbine. All or at least a portion of the heat is transferred at a temperature no greater than about 500 F. and at a flow ratio of the fuel to the gas turbine to the synthesis gas stream from at least about 1. 5. The heating of the fuel to the gas turbine lowers fuel consumption and thereby the total expenses involved in generating electricity and syngas.
Prasad Shrikrishna Apte - East Amherst NY, US James Patrick Meagher - Buffalo NY, US Shawn W. Callahan - Tonawanda NY, US
Assignee:
Praxair S. T. Technology, Inc. - North Haven CT
International Classification:
B32B 15/04
US Classification:
428633, 428678, 416241 R
Abstract:
This invention relates to coatings for a metal or non-metal substrate comprising (i) a thermal sprayed bondcoat layer applied to the substrate, and (ii) a thermal sprayed ceramic layer applied to the bondcoat layer; wherein said coating has a helium leak rate of less than 6×10standard cubic centimeters per second. The thermal sprayed bondcoat layer comprises an alloy of MCrAlM′ wherein M is an element selected from nickel, cobalt, iron and mixtures thereof, and M′ is an element selected from yttrium, zirconium, hafnium, ytterbium and mixtures thereof. The alloy is thermally sprayed from a powder having a mean particle size of 50 percentile point in distribution of from about 5 microns to about 100 microns. The coatings are useful for extending the service life under severe conditions, such as those associated with metallurgical vessels' lances, nozzles and tuyeres.
Prasad Shrikrisnna Apte - East Amherst NY, US James Patrick Meagher - Buffalo NY, US Shawn W. Callahan - Tonawanda NY, US
Assignee:
Praxair S. T. Technology, Inc. - North Haven CT
International Classification:
B32B 15/04
US Classification:
428633, 428678, 416241 R
Abstract:
This invention relates to coatings for a metal or non-metal substrate comprising (a) a thermal sprayed bondcoat layer applied to the substrate, and (b) a thermal sprayed ceramic layer applied to said bondcoat layer; wherein said coating has a helium leak rate of less than 6×10standard cubic centimeters per second. The thermal sprayed bondcoat layer comprises (i) a thermal sprayed inner layer alloy, and (ii) a thermal sprayed outer layer alloy. The inner layer alloy is thermally sprayed from a powder having a mean particle size of 50 percentile point in distribution of from about 5 microns to about 50 microns. The outer layer alloy is thermally sprayed from a powder having a mean particle size of 50 percentile point in distribution of from about 30 microns to about 100 microns. The coatings are useful for extending the service life under severe conditions, such as those associated with metallurgical vessels' lances, nozzles and tuyeres.
Multi-Output Valve Useful To Promote Non-Stationary Flame
James Patrick Meagher - Buffalo NY, US Mark Allen Kailburn - Tonawanda NY, US Willam Thoru Kobayashi - East Amherst NY, US Bryan R Bielec - Hamburg NY, US Friedrich Eduard Purkert - Buffalo NY, US
Assignee:
Praxair Technology, Inc. - Danbury CT
International Classification:
F16K 11/08
US Classification:
13762511, 13762546
Abstract:
A valve useful in distributing gas received in one inlet to several outlets in a sequence, and burner apparatus including this valve for feeding material in sequence to outlets of a burner thereby forming a non-stationary flame at the burner.
Multi-Output Valve And Burner Useful To Promote Non-Stationary Flame
James Patrick Meagher - Buffalo NY, US Mark Allen Kailburn - Tonawanda NY, US William Thoru Kobayashi - East Amherst NY, US Bryan R. Bielec - Hamburg NY, US Friedrich Eduard Purkert - Buffalo NY, US
Assignee:
Praxair Technology, Inc. - Danbury CT
International Classification:
F23N 1/00
US Classification:
431280, 431 12, 431 18, 431 8, 13762511, 13762546
Abstract:
A valve useful in distributing gas received in one inlet to several outlets in a sequence, and burner apparatus including this valve for feeding material in sequence to outlets of a burner thereby forming a non-stationary flame at the burner.
Method And Apparatus To Promote Non-Stationary Flame
William Kobayashi - East Amherst NY, US Abilio Tasca - Sao-Paulo - SP, BR James Meagher - Buffalo NY, US Mark Kailburn - North Tonawanda NY, US
International Classification:
F23C 5/00
US Classification:
431008000, 431174000
Abstract:
A burner has a central port and 3 or more outer ports whose axes are angled toward or away from the central port axis. Sequentially varying the outer port(s) from which material is injected at a high enough momentum to deflect the flame from the axis of the central port changes the orientation of the flame with respect to the central port axis.
Method Of Controlling Oxygen Addition To A Steam Methane Reformer
M. Ahmed - Pittsford NY, US James Meagher - Buffalo NY, US Edward Jurasevich - Crown Point IN, US
International Classification:
C01B 3/26
US Classification:
423652000
Abstract:
A method is disclosed for controlling addition of a supplementary oxygen stream into a steam methane reformer utilizing both the supplementary oxygen stream and a primary oxidant stream to support combustion of a fuel stream by burners firing into a radiant section of the reformer. The combustion generates heat to support endothermic heat requirements of the reforming reaction conducted in reformer tubes to obtain an enhanced rate of production of a product gas stream produced by the endothermic reaction. In the method, a temperature is obtained that is at least referable to a reformer tube wall temperature measured at a location of inlet regions of the reformer tubes at which a maximum temperature is produced at the enhanced rate of production. This temperature is controlled by regulating the flow rate of the supplementary oxygen stream to either prevent damage to the reformer tubes at such location at which the maximum temperature is produced or to maintain the maximum temperature if the same is less than a temperature that will damage the tubes.
Resumes
Manager, National Compensation & Benefits At Grant Thornton Llp