Heat exchanger method and apparatus

Patent · Tue Jun 02 04:00:00 EDT 1987

OSTI ID:6355598

Warner, D F

The method is described of recovering heat energy from an exhaust gas containing a corrosive constituent which is condensable at and below a corrosive condensation temperature by passing the gas successively through first and second heat exchangers each connected to transfer heat to a fluid. The second heat exchanger contains corrosion-protection exterior tube-coverings having a material limit operating temperature exceeding the corrosive condensation temperature. The flow rates and temperatures of the exhaust gas and the fluid are heated by each heat exchanger being arranged so that passage of the exhaust gas through the first heat exchanger cools the exhaust gas from a first temperature exceeding the material limit operating temperature to a second temperature which is below the material limit operating temperature but above the corrosive condensation temperature.

• Assignee: Heat Exchanger Industries, Inc., Latham, NY
• Patent Number(s): US 4669530
• OSTI ID: 6355598
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
COOLING
CORROSION PROTECTION
CORROSIVE EFFECTS
DESIGN
ENERGY RECOVERY
ENERGY TRANSFER
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
HEAT EXCHANGERS
HEAT RECOVERY
HEAT TRANSFER
HEAT TRANSFER FLUIDS
OPERATION
RECOVERY
TEMPERATURE DEPENDENCE
VAPOR CONDENSATION
WASTES