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Title: Wastewater heat recovery apparatus

Abstract

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.

Inventors:
 [1]
  1. 108 Independent Blvd., Aiken, SC 29801
Issue Date:
Research Org.:
Savannah River Site (SRS), Aiken, SC (United States)
OSTI Identifier:
868445
Patent Number(s):
5143149
Assignee:
Kronberg, James W. (108 Independent Blvd., Aiken, SC 29801)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02B - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
DOE Contract Number:  
AC09-89SR18035
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
wastewater; 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; /165/4/236/

Citation Formats

Kronberg, James W. Wastewater heat recovery apparatus. United States: N. p., 1992. Web.
Kronberg, James W. Wastewater heat recovery apparatus. United States.
Kronberg, James W. Wed . "Wastewater heat recovery apparatus". United States. https://www.osti.gov/servlets/purl/868445.
@article{osti_868445,
title = {Wastewater heat recovery apparatus},
author = {Kronberg, James W},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

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