Apparatus for regenerative flue gas heat exchanger
AssigneeApparatebau Rothemuhle Brandt & Kritzler
InventorGunther Raths
Life of this patent
Estimating the term…
Abstract
A flue gas scrubbing system for fossil fuel power plant boilers in which the flue gas traverses an air heater from the boiler and an electrostatic or another particulate removal unit before fully or partially passing through a heat exchanger which is used to reheat the clean gas produced by scrubbing all or part of the crude flue gas. To prevent water droplets in the clean gas from entering the heat exchanger, a portion of the crude gas or preferably a recirculated portion of the reheated clean gas is introduced into said clean gas before it enters the heat exchanger with or without further heating, e.g. in indirect heat exchange with a portion of the crude gas branched from a location upstream of the air heater.
Claims6
A regenerative heat exchanger for processing a crude flue gas from a boiler comprising:
- a stationary regenerated heat exchanger mass adapted to be traversed by a gas;
- a fixed feed hood communicating with one side of said mass and a fixed collection hood communicating with an opposite side of said mass;
- a rotary feed hood and a rotary collection hood on opposite sides of said mass within said fixed hood for communicating with registered limited portions of said mass;
- means for introducing a first gas stream into one of said feed hoods and for conducting said first gas stream from the corresponding collection hood and means for introducing a second gas stream into the other of said feed hoods and for collecting said second gas stream into the other collection hoods whereby said first and second gas streams are passed in a regenerative indirect heat exchange relationship through said mass, said means including respective fixed ducts communicating with said hoods;
- and respective fittings on opposite sides of said mass for passing a third gas stream through said heat exchanger.
Dependencies are inferred from the claim text.