skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Integrated air separation plant-integrated gasification combined cycle power generator

Abstract

This patent describes an integrated gasification combined cycle power generation system, comprising an air separation unit wherein air is compressed, cooled, and separated into an oxygen and nitrogen enriched fractions, a gasification system for generating a fuel gas, an air compressor system for supplying compressed air for use in combusting the fuel gas, a combustion zone for effecting combustion of the compressed air and the fuel gas, and a gas turbine for effecting the generation of power from the resulting combusted gases from the combustion zone in the combined cycle power generation system. It comprises independently compressing feed air to the air separation unit to pressures of from 8 to 20 bar from the compressor system used to compress air for the combustion zone; cryogenically separating the air in the air separation unit having at least one distillation column operating at pressures of between 8 and 20 bar and producing an oxygen enriched fraction consisting of low purity oxygen, and; utilizing at least a portion of the low purity oxygen for effecting gasification of a carbon containing fuel source by partial oxidation in the gasification system and thereby generating a fuel gas stream; removing at least a portion of amore » nitrogen enriched fraction from the air separation unit and boosting its pressures to a pressure substantially equal to that of the fuel gas stream; and expanding at least another portion of the nitrogen enriched fraction in an expansion engine.« less

Inventors:
;
Publication Date:
OSTI Identifier:
5284971
Patent Number(s):
US 5081845; A
Application Number:
PPN: US 7-547570
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (United States) NOV; NOV-92-024042; EDB-92-095117
Resource Type:
Patent
Resource Relation:
Patent File Date: 2 Jul 1990
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AIR; SEPARATION PROCESSES; GAS GENERATORS; SEPARATION EQUIPMENT; CARBON; COMBINED CYCLES; COMBUSTION; COMPRESSION; COOLING; CRYOGENICS; FUEL GAS; GAS TURBINES; GASIFICATION; MEDIUM PRESSURE; NITROGEN; OXYGEN; POWER GENERATION; CHEMICAL REACTIONS; ELEMENTS; EQUIPMENT; FLUIDS; FUELS; GAS FUELS; GASES; MACHINERY; NONMETALS; OXIDATION; THERMOCHEMICAL PROCESSES; THERMODYNAMIC CYCLES; TURBINES; TURBOMACHINERY; 200108* - Fossil-Fueled Power Plants- Fuels- (1980-); 200102 - Fossil-Fueled Power Plants- Power Cycles; 400800 - Combustion, Pyrolysis, & High-Temperature Chemistry

Citation Formats

Allam, R.J., and Topham, A. Integrated air separation plant-integrated gasification combined cycle power generator. United States: N. p., 1992. Web.
Allam, R.J., & Topham, A. Integrated air separation plant-integrated gasification combined cycle power generator. United States.
Allam, R.J., and Topham, A. Tue . "Integrated air separation plant-integrated gasification combined cycle power generator". United States. doi:.
@article{osti_5284971,
title = {Integrated air separation plant-integrated gasification combined cycle power generator},
author = {Allam, R.J. and Topham, A.},
abstractNote = {This patent describes an integrated gasification combined cycle power generation system, comprising an air separation unit wherein air is compressed, cooled, and separated into an oxygen and nitrogen enriched fractions, a gasification system for generating a fuel gas, an air compressor system for supplying compressed air for use in combusting the fuel gas, a combustion zone for effecting combustion of the compressed air and the fuel gas, and a gas turbine for effecting the generation of power from the resulting combusted gases from the combustion zone in the combined cycle power generation system. It comprises independently compressing feed air to the air separation unit to pressures of from 8 to 20 bar from the compressor system used to compress air for the combustion zone; cryogenically separating the air in the air separation unit having at least one distillation column operating at pressures of between 8 and 20 bar and producing an oxygen enriched fraction consisting of low purity oxygen, and; utilizing at least a portion of the low purity oxygen for effecting gasification of a carbon containing fuel source by partial oxidation in the gasification system and thereby generating a fuel gas stream; removing at least a portion of a nitrogen enriched fraction from the air separation unit and boosting its pressures to a pressure substantially equal to that of the fuel gas stream; and expanding at least another portion of the nitrogen enriched fraction in an expansion engine.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 21 00:00:00 EST 1992},
month = {Tue Jan 21 00:00:00 EST 1992}
}
  • No abstract prepared.
  • A gasification power plant 10 includes a compressor 32 producing a compressed air flow 36, an air separation unit 22 producing a nitrogen flow 44, a gasifier 14 producing a primary fuel flow 28 and a secondary fuel source 60 providing a secondary fuel flow 62 The plant also includes a catalytic combustor 12 combining the nitrogen flow and a combustor portion 38 of the compressed air flow to form a diluted air flow 39 and combining at least one of the primary fuel flow and secondary fuel flow and a mixer portion 78 of the diluted air flow tomore » produce a combustible mixture 80. A catalytic element 64 of the combustor 12 separately receives the combustible mixture and a backside cooling portion 84 of the diluted air flow and allows the mixture and the heated flow to produce a hot combustion gas 46 provided to a turbine 48. When fueled with the secondary fuel flow, nitrogen is not combined with the combustor portion.« less
  • System and method to estimate variables in an integrated gasification combined cycle (IGCC) plant are provided. The system includes a sensor suite to measure respective plant input and output variables. An extended Kalman filter (EKF) receives sensed plant input variables and includes a dynamic model to generate a plurality of plant state estimates and a covariance matrix for the state estimates. A preemptive-constraining processor is configured to preemptively constrain the state estimates and covariance matrix to be free of constraint violations. A measurement-correction processor may be configured to correct constrained state estimates and a constrained covariance matrix based on processingmore » of sensed plant output variables. The measurement-correction processor is coupled to update the dynamic model with corrected state estimates and a corrected covariance matrix. The updated dynamic model may be configured to estimate values for at least one plant variable not originally sensed by the sensor suite.« less
  • Control system and method for controlling an integrated gasification combined cycle (IGCC) plant are provided. The system may include a controller coupled to a dynamic model of the plant to process a prediction of plant performance and determine a control strategy for the IGCC plant over a time horizon subject to plant constraints. The control strategy may include control functionality to meet a tracking objective and control functionality to meet an optimization objective. The control strategy may be configured to prioritize the tracking objective over the optimization objective based on a coordinate transformation, such as an orthogonal or quasi-orthogonal projection.more » A plurality of plant control knobs may be set in accordance with the control strategy to generate a sequence of coordinated multivariable control inputs to meet the tracking objective and the optimization objective subject to the prioritization resulting from the coordinate transformation.« less