Heat exchanger method and apparatus

Patent · Tue Oct 11 04:00:00 EDT 1988

OSTI ID:6527568

Warner, D F

This patent describes an apparatus for recovering heat energy from a hot exhaust gas containing a corrosive constituent which is condensable at and below a corrosive condensation temperature, comprising, in combination: a first heat exchanger connected to receive the hot exhaust gas at a first temperature and operative to cool the exhaust gas by transferring heat to a fluid and to discharge the exhaust gas at a second temperature which is above the corrosive condensation temperature and which is below a material limit temperature; and a second heat exchanger connected to receive exhaust gas which has been discharged from the first heat exchanger and operative to cool at least a portion of the exhaust gas by transferring heat to a fluid to a third temperature below the corrosive condensation temperature, the second heat exchanger containing a corrosion-protection material, heat exchanging, the material limit temperature being the gas temperature at and above which the corrosion-protection material is subject to thermal damage, the first temperature being above the material limit temperature.

• Assignee: Heat Exchanger Industries, Inc., Latham, NY
• Patent Number(s): US 4776391
• OSTI ID: 6527568
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
36 MATERIALS SCIENCE
360604 -- Materials-- Corrosion
Erosion
& Degradation
COOLING
CORROSION PROTECTION
CORROSION RESISTANCE
DESIGN
ENERGY RECOVERY
ENERGY TRANSFER
EQUIPMENT
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
HEAT EXCHANGERS
HEAT RECOVERY
HEAT RECOVERY EQUIPMENT
HEAT TRANSFER
MATERIALS
RECOVERY
TEMPERATURE EFFECTS
WASTES