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Title: Method and apparatus for waste destruction using supercritical water oxidation

Abstract

The invention relates to an improved apparatus and method for initiating and sustaining an oxidation reaction. A hazardous waste, is introduced into a reaction zone within a pressurized containment vessel. An oxidizer, preferably hydrogen peroxide, is mixed with a carrier fluid, preferably water, and the mixture is heated until the fluid achieves supercritical conditions of temperature and pressure. The heating means comprise cartridge heaters placed in closed-end tubes extending into the center region of the pressure vessel along the reactor longitudinal axis. A cooling jacket surrounds the pressure vessel to remove excess heat at the walls. Heating and cooling the fluid mixture in this manner creates a limited reaction zone near the center of the pressure vessel by establishing a steady state density gradient in the fluid mixture which gradually forces the fluid to circulate internally. This circulation allows the fluid mixture to oscillate between supercritical and subcritical states as it is heated and cooled.

Publication Date:
Sponsoring Org.:
US Department of Energy
OSTI Identifier:
20015718
Alternate Identifier(s):
OSTI ID: 20015718
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 29 Feb 2000
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; HAZARDOUS MATERIALS; SUPERCRITICAL GAS EXTRACTION; OXIDATION; CHEMICAL REACTORS; PRESSURE VESSELS; DESIGN; HYDROGEN PEROXIDE; WATER; TEMPERATURE CONTROL

Citation Formats

NONE. Method and apparatus for waste destruction using supercritical water oxidation. United States: N. p., 2000. Web.
NONE. Method and apparatus for waste destruction using supercritical water oxidation. United States.
NONE. Tue . "Method and apparatus for waste destruction using supercritical water oxidation". United States.
@article{osti_20015718,
title = {Method and apparatus for waste destruction using supercritical water oxidation},
author = {NONE},
abstractNote = {The invention relates to an improved apparatus and method for initiating and sustaining an oxidation reaction. A hazardous waste, is introduced into a reaction zone within a pressurized containment vessel. An oxidizer, preferably hydrogen peroxide, is mixed with a carrier fluid, preferably water, and the mixture is heated until the fluid achieves supercritical conditions of temperature and pressure. The heating means comprise cartridge heaters placed in closed-end tubes extending into the center region of the pressure vessel along the reactor longitudinal axis. A cooling jacket surrounds the pressure vessel to remove excess heat at the walls. Heating and cooling the fluid mixture in this manner creates a limited reaction zone near the center of the pressure vessel by establishing a steady state density gradient in the fluid mixture which gradually forces the fluid to circulate internally. This circulation allows the fluid mixture to oscillate between supercritical and subcritical states as it is heated and cooled.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 29 00:00:00 EST 2000},
month = {Tue Feb 29 00:00:00 EST 2000}
}