Arvos Ljungstrom LLC

Arvos Gmbh

Arvos Ljunstrom LLC

Glenn D Mattison

Kevin James O'Boyle

James David Seebald

James W Birmingham

Jeffrey M O'Boyle

Jeffery E Yowell

Set Erik Jonas Klingspor

Huo Yan

David G Breckinridge

Kevin O'BOYLE

Jeffrey M O'BOYLE

A method for improving effectiveness of a steam generator system includes providing a steam generator system including a steam generator vessel, an air supply system and an air preheater. The air supply system is in communication with the steam generator vessel through the air preheater and the steam generator vessel is in communication with the air preheater. The air supply system provides a first amount of air to the air preheater. At least a portion of the first amount of air is provided to the steam generator vessel. A flue gas mixture is discharged from the steam generator vessel. At least a portion of the flue gas mixture flows into the air preheater. SOin the flue gas mixture is mitigated before the flue gas mixture enters the air preheater.

Method and system for improving boiler effectiveness

A heat transfer sheet assembly for a rotary regenerative heat exchanger has first and second heat transfer sheet elements stacked one against the other with a first repeat of a first profile on one sheet element opposing a second repeat of a second profile on the other sheet element. The sheet elements are spaced apart by a plurality of wide-gauged parallel sheet spacing features of the first profile repeat RI of the second profile repeat to form a generally close sided elongate channel for gaseous flow therethrough. The second profile of repeat includes an elongate fifth sheet spacing feature in the form of a lobe contacting undulations of the adjacent first profile of repeat.

Heat transfer sheet assembly with an intermediate spacing feature

A stack of heat transfer sheets includes one or more first sheet which includes a first undulating surface formed by first lobes that are parallel to each other and oriented at a first angle. The first sheets include a second undulating surface formed by second lobes that are parallel to each other and oriented at a second angle, different from the first angle. The first sheets include a third undulating surface formed by third lobes extending from one or more ends of the first sheet and terminating at an intermediate point between the end and an opposing end thereof. The third lobes are parallel to each other and parallel to the direction of flow through the stack. The stack includes one or more second sheets defining a plurality of sheet spacing features which engage a portion of the first sheet.

Heat transfer sheet for rotary regenerative heat exchanger

A method for improving effectiveness of a steam generator system includes providing air to an air preheater at a mass flow such that the air preheater has a cold end outlet temperature defined by the improved air preheater operating with increased heat recovery (HR) of at least 1% calculated according to the equation: HR=100%&#xd7;((Tgi&#x2212;TgoAdvX)/(Tgi&#x2212;TgoSTD)&#x2212;1). The method requires either reducing the amount of heat that flows into the air preheater from the flue gas and/or increasing the amount of heat extracted from the flue gas. The method includes mitigating SOin the flue gas which is discharged directly from the air preheater to a particulate removal system and then directly into a flue gas desulfurization system. The method includes extracting heat from the Flue gas to create equipment preheat and/or flue gas stack reheat air with the latter being fed to heat the flue gas prior to entering a discharge stack to raise the temperature of the flue gas to mitigate visible plume exiting and to mitigate corrosion in, the discharge stack.

A method for improving effectiveness of a steam generator system includes providing air to an air preheater in excess of that required for combustion of fuel and providing the air at a mass flow such that the air preheater has a cold end metal temperature that is no less than a water dew point temperature in the air preheater and such that the cold end metal temperature is less than a sulfuric acid dew point temperature. The method includes mitigating SOin the flue gas which is discharged directly from the air preheater to a particulate removal system and then directly into a flue gas desulfurization system. Flue gas reheat air is fed from the air preheater to heat the flue gas prior to entering a discharge stack to raise the temperature of the flue gas to mitigate visible plume exiting and to mitigate corrosion in the discharge stack.

A heat transfer sheet [] for a rotary regenerative heat exchanger is shaped to include sheet spacing features [], which provide spacing between adjacent heat transfer sheets [], and undulation surfaces [] (corrugations) in the sections between the sheet spacing features []. The undulation sections [] are constructed of regularly spaced lobes [] extending at an angle with respect to the spacing features []. The undulating sections [] impart turbulence in the air or flue gas flowing between the heat transfer sheets [] to improve heat transfer. The heat transfer sheets [] may include undulating surfaces that differ in angle of their lobes [

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Machias, NY, United States of America

Glenn D Mattison