Combustion Engineering, Inc.

Alstom Technology Limited

Abb Alstom Power Inc.

General Electric Technology Gmbh

Mark Palkes

Glen Jukkola

Bard C Teigen

Richard E Waryasz

Gregory N Liljedahl

Srivats Srinivasachar

Wayne S Counterman

James David Seebald

Carl R Bozzuto

David K Anderson

Majed A Toqan

Michael J Rini

Stanley R Wysk

Nsakala Ya Nsakala

Donald W Bairley

Kjell E Porle

Friedrich W Pinnekamp

James D Wesnor

Boris Gurvich

Bard Teigen

An air infiltration abatement system () for a power plant () includes a recirculated flue gas source (), a recirculated flue gas supply line () connected to the recirculated flue gas source () and a power plant component. The power plant component has a leakage area in fluid communication with the recirculated flue gas supply line (). The recirculated flue gas source () receives a combustion flue gas () from an oxygen fired boiler () of the power plant (), and provides the combustion flue gas () to the recirculated flue gas supply line (). The recirculated flue gas supply line () supplies the combustion flue gas () as a recirculated flue gas () to the oxygen fired boiler () via the leakage area of the power plant component.

Gas leakage reduction system

A solar power generation system includes a solar receiver disposed on a tower that receives radiant heat reflected from a field of solar collectors. The solar receiver includes an evaporator having a plurality of vertically oriented tubes to form a panel for receiving a fluid, such as water and/or steam, wherein the tubes have a rifled internal surface. The fluid within the tubes has a mass flow greater than 0.2&#xd7;10lb/hr/ftat a pressure in the range of 100-2850 psia, wherein radiant heat fluxes on the outside of the tubes exceed 185,00 but/hr/ft.

Solar steam generator

A continuous moving bed solar steam generation and storage system is provided to generate steam for production processes after loss or reduction of received solar energy. The system includes a receiverthat receives a flowing stream of particulate materialthat absorbs solar radiant energyas it passes through beams of the energyreceived from collectors. The heated stream of materialpasses into a first chamberto heat a tube bundletherein. Heat from the particulate materialis transferred to the bundle, evaporating the water to generate, reheat (RH) and/or superheat (SH) steam. The cooled materialpasses to a second chamber. The materialis drained from the second chamberand carried to a cyclonein the receiver. The materialdrains from the cycloneto complete the flow cycle.

Continuous moving bed solar steam generation system

A system is described wherein a boileris integrated with an oxygen producing device. Combustion heat generated in the boileris used to generate steam in the boiler and is also applied to at least one of a sweep gas streamand a feed gas streamto ensure that the sweep gas and feed gas streamsare provided at the appropriate temperature to the oxygen producing device. Flue gas generated by fuel combustion within the combustion chambermay be used as the sweep gas stream, in which case, the flue gas exiting the oxygen producing deviceincludes the oxygen removed from the feed gas stream. The flue gas/oxygen mixture may be used for fuel combustion within the combustion chamber, and may be provided to an oxygen separatorfor removing oxygen from the flue gas. Sensible heat contained in the oxygen depleted feed gas from the oxygen producing devicemay be recovered by the feed gas stream

Boiler having an integrated oxygen producing device

A fossil fuel fired combustion apparatus and a method for operating the fossil fuel fired combustion apparatus are provided which offer the flexibility to use carbon dioxide (CO,) both as a desirable end product and as support to the combustion process. The method includes the step of introducing a substantially pure oxygen feed stream into the fossil fuel fired combustion apparatus and the step of combusting a fossil fuel in the presence of the substantially pure oxygen feed stream to produce a flue gas having carbon dioxide and water vapor as its two largest constituent elements by volume. The method also includes the step of passing the flue gas through an oxygen feed stream pre-heater at which heat from the flue gas is transferred to the oxygen feed stream. Furthermore, the method includes the step of separating the flue gas into an end product portion and a recycling portion. The method additionally includes cooling and compressing the end product portion of the flue gas so as to yield carbon dioxide in a liquid phase and directing the recycling portion of the flue gas to the fossil fuel fired combustion unit to contribute to the combustion process therein.

Combustion method and apparatus for producing a carbon dioxide end product

The water flow circuit for a heat recovery steam generator is a hybrid system which combines a circulating drum type circuit and a once-through circuit. A low pressure evaporator is designed for natural or forced circulation and a high pressure evaporator is designed for once-through flow. Orifices may be located in the inlet of the evaporator tubes for flow stability and an intermediate header between the evaporator and high pressure superheater improves stability, minimizes orifice pressure drop and equalizes pressure losses between evaporator tubes.

Heat recovery steam generator

The flue gas temperature coming from an air preheater to a particulate collection device such as an electrostatic precipitation or fabric filter is reduced to improve the operation of the particulate collection device. This may be done by reducing the exit flue gas temperature from the air preheater or reducing the temperature after exiting. In one embodiment, air in excess of that needed for combustion is passed through the air preheater with the heated excess air either being dumped or used for a variety of purposes in the plant. A particular embodiment involves segmenting the air outlet side of a rotary regenerative air preheater and withdrawing the excess air from the segment where the dust loading is the lowest. Further, additional cooling of the flue gas can be provided by reducing the quantity of primary air that typically bypasses the air preheater and then providing other ways to control the primary air temperature to the pulverizers. The flue gas temperature may also be cooled after the air preheater by heat exchange or spray cooling with water.

Steam generator system operation

The water flow circuit for a heat recovery steam generator includes both a low pressure circuit and a high pressure circuit. Both circuits are designed for once-through flow and both include evaporators with rifled tubing. A pressure equalizing header may be located between the evaporator and superheater and orifices may be located at the inlet to the evaporator for flow stability.

A coal fired power plant includes the catalytic reduction of NO.sub.x in the flue gas and the catalytic oxidation of SO.sub.2 to SO.sub.3 followed by the hydration of the SO.sub.3 to H.sub.2 SO.sub.4 vapor and then the condensation to H.sub.2 SO.sub.4 liquid. The condensation takes place in a wet sulfuric acid condenser by heat exchange with incoming combustion air. A portion of the heat picked up by that combustion air is used to provide a portion of the heat for the condensate from the steam turbine. The combustion air is then fed to an air preheater and to the steam generator as primary and secondary combustion air.

Air pollution control and heat recovery system and process for coal

A two part heat recovery unit receives a high temperature gas mixture (2) in the lower, refractory-lined dwell furnace (4) wherein the gas is cooled to condense out liquid inert ash material. The cooled gas mixture exits the dwell furnace (4) vertically upward through a transistion duct (18) which includes a restricted throat (28). Additional ash and potassium seed compounds condensed from the gas mixture in the convective furnace (20) either form a loose flyash which exits the convective furnace (20) with the gas mixture via the backpass (24), or collect on the walls and heat transfer surfaces (22) of the furnace (20) as a liquid which runs downward toward the throat (28) and is there reentrained by the high velocity gas stream.

Slagging heat recovery unit with potassium seed recovery

A magnetohydrodynamic topping unit is added to a pre-existing fossil fuel steam generating plant by a system of conduits and a chamber which show the high velocity output gas of the generator, attenuate oxides of nitrogen, reduce the temperature of the channel output gas, and initiate recovery of seed material. The connecting system is arranged to recover heat from the output gas of the MHD channel by absorbing this heat in the feed water system of the steam generator. The addition of the MHD channel to the existing steam generator provides an alternate source of heat for the steam generator.

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Glastonbury, CT, United States of America

Mark Palkes