skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Energy recovery system

Abstract

The present invention is directed to an improved wet air oxidation system and method for reducing the chemical oxygen demand (COD) of waste water used from scrubbers of coal gasification plants, with this COD reduction being sufficient to effectively eliminate waste water as an environmental pollutant. The improvement of the present invention is provided by heating the air used in the oxidation process to a temperature substantially equal to the temperature in the oxidation reactor before compressing or pressurizing the air. The compression of the already hot air further heats the air which is then passed in heat exchange with gaseous products of the oxidation reaction for "superheating" the gaseous products prior to the use thereof in turbines as the driving fluid. The superheating of the gaseous products significantly minimizes condensation of gaseous products in the turbine so as to provide a substantially greater recovery of mechanical energy from the process than heretofore achieved.

Inventors:
 [1];  [1]
  1. Morgantown, WV
Issue Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
OSTI Identifier:
863722
Patent Number(s):
4234423
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02W - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
energy; recovery; directed; improved; wet; air; oxidation; method; reducing; chemical; oxygen; demand; cod; waste; water; scrubbers; coal; gasification; plants; reduction; sufficient; effectively; eliminate; environmental; pollutant; improvement; provided; heating; process; temperature; substantially; equal; reactor; compressing; pressurizing; compression; hot; heats; passed; heat; exchange; gaseous; products; reaction; superheating; prior; turbines; driving; fluid; significantly; minimizes; condensation; turbine; provide; mechanical; heretofore; achieved; driving fluid; temperature substantially; waste water; heat exchange; coal gasification; gaseous product; coal gas; energy recovery; gaseous products; substantially equal; hot air; oxidation process; oxidation reaction; oxidation reactor; mechanical energy; oxygen demand; effectively eliminate; air oxidation; chemical oxygen; wet air; environmental pollutant; products prior; /210/60/162/

Citation Formats

Moore, Albert S, and Verhoff, Francis H. Energy recovery system. United States: N. p., 1980. Web.
Moore, Albert S, & Verhoff, Francis H. Energy recovery system. United States.
Moore, Albert S, and Verhoff, Francis H. Tue . "Energy recovery system". United States. https://www.osti.gov/servlets/purl/863722.
@article{osti_863722,
title = {Energy recovery system},
author = {Moore, Albert S and Verhoff, Francis H},
abstractNote = {The present invention is directed to an improved wet air oxidation system and method for reducing the chemical oxygen demand (COD) of waste water used from scrubbers of coal gasification plants, with this COD reduction being sufficient to effectively eliminate waste water as an environmental pollutant. The improvement of the present invention is provided by heating the air used in the oxidation process to a temperature substantially equal to the temperature in the oxidation reactor before compressing or pressurizing the air. The compression of the already hot air further heats the air which is then passed in heat exchange with gaseous products of the oxidation reaction for "superheating" the gaseous products prior to the use thereof in turbines as the driving fluid. The superheating of the gaseous products significantly minimizes condensation of gaseous products in the turbine so as to provide a substantially greater recovery of mechanical energy from the process than heretofore achieved.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

Patent:

Save / Share: