Todd D Anderson

US Patent:

6357396, Mar 19, 2002

Filed:

Jun 15, 2000

Appl. No.:

09/594448

Inventors:

Tod A. Stansfield - Elm Grove WI
Wilfred L. Ayala - Oak Creek WI
Stephen R. Wilkinson - Grafton WI
Brian W. Huibregtse - Menomonee Falls WI
Todd L. Anderson - Menomonee Falls WI
Hyunjae Park - Franklin WI

Assignee:

Aqua-Chem, Inc. - Milwaukee WI

International Classification:

F22D 100

US Classification:

122 7R, 165166

Abstract:

An exhaust gas heat recuperation system for use with a boiler is disclosed. The heat recuperation system includes a plate-type heat exchanger for exhaust gas heat recovery for exchanging heat between an exhaust gas and a charge gas. The heat exchanger preferably includes a series of exhaust gas plates stacked alternately with, and parallel to, a series of charge gas plates. Each of the exhaust gas plates and charge gas plates have raised contained ridges to form a substantially sinusoidal path for directing the respective gas therealong. The shape of the path reduces exhaust gas particulate deposition. The charge gas flows in a countercurrent to the exhaust gas to facilitate maximum heat transfer. The heat exchange is particularly useful in laminar flow conditions. In one embodiment, the heat exchanger is connected to exhaust gas inlet and outlet conduits, change gas inlet and outlet conduits, and a condensate collection changer as part of an exhaust gas heat recuperation system, for use particularly in steam or hot water boiler applications.

US Patent:

6470835, Oct 29, 2002

Filed:

Dec 17, 2001

Appl. No.:

10/024086

Inventors:

Tod A. Stansfield - Elm Grove WI
Wilfred L. Ayala - Oak Creek WI
Stephen R. Wilkinson - Grafton WI
Brian W. Huibregtse - Menomonee Falls WI
Todd L. Anderson - Menomonee Falls WI
Hyunjae Park - Franklin WI

Assignee:

Aqua-Chem, Inc. - Milwaukee WI

International Classification:

F22D 100

US Classification:

122 7R, 122 311, 165166

Abstract:

An exhaust gas heat recuperation system for use with a boiler is disclosed. The heat recuperation system includes a plate-type heat exchanger for exhaust gas heat recovery for exchanging heat between an exhaust gas and a charge gas. The heat exchanger preferably includes a series of exhaust gas plates stacked alternately with, and parallel to, a series of charge gas plates. Each of the exhaust gas plates and charge gas plates have raised contained ridges to form a substantially sinusoidal path for directing the respective gas therealong. The shape of the path reduces exhaust gas particulate deposition. The charge gas flows in a countercurrent to the exhaust gas to facilitate maximum heat transfer. The heat exchange is particularly useful in laminar flow conditions. In one embodiment, the heat exchanger is connected to exhaust gas inlet and outlet conduits, change gas inlet and outlet conduits, and a condensate collection changer as part of an exhaust gas heat recuperation system, for use particularly in steam or hot water boiler applications.