General Electric Company

Texaco Inc.

George Morris Gulko

Paul Steven Wallace

Pradeep Stanley Thacker

Michael C Martin

John D Winter

Frederick C Jahnke

William B Crouch

Beth E McCracken

Srikanth Konda

John Saunders Stevenson

Charles P Marion

Constantin Dinu

Judeth Brannon Corry

George Frederick Frey

Michael M Dach

Allyson Joy Jimenez-Huyke

Harold C Kaufman

Rupinder Singh Benipal

James F Beall

Richard L Zhao

John Michael Brady

Denise Marie Rico

Nithyanandam Mani

Daniel W Tse

Vishal Rugnathbhai Brahmbhatt

Abhinav Gour

Ramesh Mamillapalli

Ashok Kola

Dennis R Shipman

Vishal Brahmbhatt

A method includes providing a gasifier with a fuel source comprising a heavy oil, a light oil, and recovered soot. The gasifier may gasify the fuel source to generate a syngas and soot. The method also includes recovering the soot in a first separation unit that may receive a portion of the heavy oil and separate the soot from an extraction oil used to recover the soot. The first separation unit generates soot bottoms that include the portion of the heavy oil and the recovered soot. The method also includes flowing a first separation co-fractionate to a second separation unit. The first separation co-fractionate includes the extraction oil and the light oil. The second separation unit may separate the extraction oil and the light oil, and direct the light oil towards the first separation unit. The method further includes mixing the soot bottoms from the first separation unit with the light oil from the second separation unit to generate the fuel source and directing the fuel source to the gasifier for gasification.

Gasification system and method

The disclosed embodiments relate to systems for deaerating a stream of slag sump water produced by a gasifier. For example, in one embodiment, a system includes a flash vessel having a first inlet configured to introduce a first fluid into the flash vessel, wherein the flash vessel is configured to flash the first fluid to produce a first flash gas, a second inlet configured to introduce a stream from slag sump into the flash vessel, wherein the stream from slag sump comprises a mixture of a gasification fine slag, dissolved oxygen (O), and water. A gas-liquid contactor in the flash vessel is configured to contact the stream from slag sump with the first flash gas to enable the first flash gas to deaerate the stream from slag sump. A first outlet of the vessel is configured to output an overhead discharge comprising the first flash gas and oxygen from the stream from slag sump.

System for deaeration in a flash vessel

An integrated gasification combined cycle (IGCC) power plant includes an air separation unit configured to discharge a nitrogen flow and an oxygen flow. A first heat exchanger is attached to the air separation unit and heats the discharged nitrogen flow. A second heat exchanger is attached to the air separation unit and heats the discharged oxygen flow. A third heat exchanger is attached to a steam cycle of the IGCC and heats a condensate stream received from the steam cycle. A first adiabatic air compressor is attached to the first, second, and third heat exchangers. The adiabatic air compressor is configured to discharge a compressed air flow comprising a first flow and a second flow. The first flow is channeled to the first and third heat exchangers, and the second flow is channeled to the second and third heat exchangers.

Method and system for use with an integrated gasification combined cycle plant

Present embodiments include systems for reducing moisture in a solid feed provided to a gasifier. For example, in an embodiment, a feedstock preparation system includes an aspirator having a first inlet for receiving a flow of steam, a second inlet for receiving a flow of a moist gaseous phase from a grinding mechanism configured to grind a solid fuel in the presence of a conveyance gas. The moist gaseous phase includes the conveyance gas and moisture removed from the ground solid fuel. The aspirator also includes an outlet configured to output a reduced pressure flow having the steam and the moist gaseous phase. The aspirator is configured to enhance moisture removal from the ground solid fuel to produce a dry feed of the ground solid fuel. The aspirator discharge is recycled within the process to heat the incoming dry conveyance gas and improve system efficiency.

System for drying a gasification feed

In certain embodiments, a system includes a first water supply pump configured to pump water from a gas scrubber sump of a gas scrubber directly to a quench chamber sump of a quench chamber via a first water supply line.

Control system and method to operate a quench scrubber system under high entrainment

A method of recycling a tail gas includes converting sulfur present in an acid gas stream into elemental sulfur to produce a tail gas and recycling the tail gas to at least one of a gasification reactor and a gas removal subsystem.

Method and apparatus to recycle tail gas

Method of producing syngas in an IGCC system, comprising compressing and heating carbon dioxide-rich gas to produce heated compressed carbon dioxide-rich gas, mixing the heated compressed carbon dioxide-rich gas with oxygen and feedstock to form a feedstock mixture, subjecting the feedstock mixture to gasification to produce syngas, cooling the syngas in a radiant syngas cooler, contacting syngas cooled in the radiant syngas cooler with compressed carbon dioxide-rich gas to further cool the syngas, and removing an amount of carbon dioxide-rich gas from the product mixture and compressing the removed carbon dioxide-rich gas prior to mixing with oxygen and feedstock.

Methods of recycling carbon dioxide to the gasification system

A method of operating an integrated gasification combined cycle power generation system is provided. The method includes compressing air in an adiabatic air compressor to produce a compressed heated air stream, heating a nitrogen stream using the compressed heated air stream to produce a heated nitrogen stream and a cooled compressed air stream, and channeling the cooled compressed air stream to an air separation unit.

An integrated control system (ICS) for a gasification plant controls the operation of a gasifier and other critical components of the gasification plant. The ICS improves the performance of a gasification plant by controlling the operation of a gasifier and other critical components by an integrated controller, rather than by several independent controllers. The ICS is a sub-system of a larger distributed control system that controls the operation of the gasification plant. The ICS controls the following: (i) oxygen to carbon (O/C) ratio in a gasifier; (ii) syngas demand or the desired output of a gasifier; (iii) load constraints; (iv) moderator flow into a gasifier; (v) air separation unit (ASU); (vi) oxygen header vent valves; and (vii) syngas header pressure.

System and method for integrated gasification control

Radiant gas cooler apparatus for treating a particulate-laden synthetic gas, which cooler includes an elongated shell. A water wall in the shell defines an annulus communicated with a pressurized purge gas source. Hot effluent introduced to the unit passes through a heat exchange chamber defined by the water wall and enters a bath in the shell lower end wherein solid material is removed. Cooled synthetic gas which leaves the bath enters the annulus to be discharged into the bath. A regulated flow of purge gas directed into the annulus prevents entry of hot effluent gas therein, precludes the accumulation of residual solid particulate matter and corrosive gaseous components, and scours the annulus surfaces. A double dip tube arrangement also protects the vessel by equalizing the pressure across an internal water wall.

Synthetic gas radiant cooler with internal quenching and purging

In a heat exchange vessel which conducts a hot, pressurized synthetic gaseous stream carrying particulate matter through a central heat exchange chamber, a safety system for monitoring pressures within the vessel. Said heat exchange vessel includes a shell surrounding a water wall, defining an annulus therebetween. Pressure sensing means communicated with the respective heat exchange chamber and said annulus, connects to means for determining the pressure differential between said points. A purge gas source communicated with the monitor system maintains the latter free of internal passage blockage caused by accumulations of particulate matter.

Synthetic gas cooler with thermal protection

In a heat exchange vessel which conducts a hot, pressurized synthetic gaseous stream carrying particulate matter through a central heat exchange chamber, a safety system for monitoring pressures within the vessel. Said heat exchange vessel includes a shell surrounding a water wall, defining an annulus therebetween. Pressure sensing means communicated with the respective heat exchange chamber and said annulus connects to means for determining the pressure differential between said points. A purge gas source communicated with the monitor system maintains the latter free of internal passage blockage caused by accumulations of particulate matter.

A gasifier having a combustion chamber in which a hydrocarbonaceous fuel is burned to produce a usable gas. A quench chamber is positioned to receive said gas and other byproducts as an effluent stream, in a coolant liquid quench bath. A dip tube and draft tube define a tortuous passage within a quench chamber for directing the gaseous segment to a discharge port by way of said quench bath. A baffle positioned in the path of the gas includes a manifold at the baffle lower end to receive condensate which flows from said baffle face and returns water to the quench bath.

Gasification reactor with internal gas baffling and liquid collector

Synthesis gas is produced by partial oxidation of hydrocarbon charge, a first portion being cooled by indirect heat exchange and scrubbed before being combined with the quenched second portion en route to particulate scrubbing, the combined gas scrubber overhead being characterized by a desired steam:dry gas ratio which is controlled by regulating the flow of the quenched second portion in accordance with the measured properties of the combined scrubber overhead gas.

Growing community of inventors

Houston, TX, United States of America

George Morris Gulko