Wastewater heat recovery apparatus
Abstract
A heat recovery system is described 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.more »
- Inventors:
- Issue Date:
- OSTI Identifier:
- 7276005
- Patent Number(s):
- 5143149
- Application Number:
- PPN: US 7-718518
- Assignee:
- PTO; EDB-94-088659
- DOE Contract Number:
- AC09-89SR18035
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 21 Jun 1991
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; HEAT RECOVERY EQUIPMENT; DESIGN; WASTE WATER; HEAT RECOVERY; PROCESS SOLUTIONS; TEMPERATURE CONTROL; CONTROL; DISPERSIONS; ENERGY RECOVERY; EQUIPMENT; HYDROGEN COMPOUNDS; LIQUID WASTES; MIXTURES; OXYGEN COMPOUNDS; SOLUTIONS; WASTES; WATER; 320304* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization
Citation Formats
Kronberg, J W. Wastewater heat recovery apparatus. United States: N. p., 1992.
Web.
Kronberg, J W. Wastewater heat recovery apparatus. United States.
Kronberg, J W. Tue .
"Wastewater heat recovery apparatus". United States.
@article{osti_7276005,
title = {Wastewater heat recovery apparatus},
author = {Kronberg, J W},
abstractNote = {A heat recovery system is described 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. 6 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 01 00:00:00 EDT 1992},
month = {Tue Sep 01 00:00:00 EDT 1992}
}