Wastewater heat recovery apparatus
- 108 Independent Blvd., Aiken, SC 29801
A heat recovery system with a heat exchanger and a mixing valve. A drain trap includes a heat exchanger with an inner coiled tube, baffle plate, wastewater inlet, wastewater outlet, cold water inlet, and preheated water outlet. Wastewater enters the drain trap through the wastewater inlet, is slowed and spread by the baffle plate, and passes downward to the wastewater outlet. Cold water enters the inner tube through the cold water inlet and flows generally upward, taking on heat from the wastewater. This preheated water is fed to the mixing valve, which includes a flexible yoke to which are attached an adjustable steel rod, two stationary zinc rods, and a pivoting arm. The free end of the arm forms a pad which rests against a valve seat. The rods and pivoting arm expand or contract as the temperature of the incoming preheated water changes. The zinc rods expand more than the steel rod, flexing the yoke and rotating the pivoting arm. The pad moves towards the valve seat as the temperature of the preheated water rises, and away as the temperature falls, admitting a variable amount of hot water to maintain a nearly constant average process water temperature.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- DOE Contract Number:
- AC09-89SR18035
- Assignee:
- Kronberg, James W. (108 Independent Blvd., Aiken, SC 29801)
- Patent Number(s):
- US 5143149
- OSTI ID:
- 868445
- Country of Publication:
- United States
- Language:
- English
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Wastewater heat recovery method and apparatus
EXAMINATION OF A NONREGENERATIVE HEAT EXCHANGER FROM THE U.S.S. NAUTILUS (SSN-571)
Related Subjects
heat
recovery
apparatus
exchanger
mixing
valve
drain
trap
inner
coiled
tube
baffle
plate
inlet
outlet
cold
water
preheated
enters
slowed
spread
passes
downward
flows
upward
taking
fed
flexible
yoke
attached
adjustable
steel
rod
stationary
zinc
rods
pivoting
arm
free
forms
pad
seat
expand
contract
temperature
incoming
changes
flexing
rotating
moves
towards
rises
falls
admitting
variable
amount
hot
maintain
nearly
constant
average
process
water temperature
water inlet
inner coil
steel rod
heat recovery
valve seat
cold water
inner tube
heat exchange
heat exchanger
hot water
nearly constant
baffle plate
water outlet
heated water
process water
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