Method of and unit for recovery of waste energy
Transfer waste water from wash cycle of dishwasher to collection tank beneath heat exchanger surrounding hollow central space, pass waste water through dual tube heat exchanger in countercurrent relation to cool feed water for hot water heater in central space of heat exchanger, supply heat to water in heater, then hot water to dishwasher rinse. May circulate feed water downwardly through outer space of heater, formed by partition, to lower end of inner space, in which heat is supplied by electrical immersion heaters. Ends of tank of hot water may be semi-oval, semi-elliptical or the like, while partition may be sufficiently close to bottom of tank to produce a wire-drawing effect as inlet water flows from outer to inner space, thereby maintaining light or small particles which fall off electric heaters in circulation, so that such particles will be removed with hot water. Heavier particles will collect in bottom of tank and may be drained periodically.
- Assignee:
- EDB-86-003021
- Patent Number(s):
- US 4531572
- OSTI ID:
- 6346498
- Resource Relation:
- Patent File Date: Filed date 25 May 1985; Other Information: PAT-APPL-613915
- Country of Publication:
- United States
- Language:
- English
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Water heater
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Related Subjects
DISHWASHERS
WASTE WATER
HEAT RECOVERY EQUIPMENT
DESIGN
WATER HEATERS
WASTE HEAT UTILIZATION
CIRCULATING SYSTEMS
FEEDWATER
HEAT EXCHANGERS
HOT WATER
APPLIANCES
EQUIPMENT
HEATERS
HYDROGEN COMPOUNDS
LIQUID WASTES
OXYGEN COMPOUNDS
WASTE PRODUCT UTILIZATION
WASTES
WATER
320303* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes