Method and apparatus for waste destruction using supercritical w

Details Method and apparatus for waste destruction using supercritical w Method and apparatus for waste destruction using supercritical w

1998-05-11

2000-02-29

Knode, Marian C.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including heat exchanger for reaction chamber or reactants...

422242, 422119, 422228, 422230, G21C 900

Patent

active

060305878

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.

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patent: 5591415 (1997-01-01), Dassel et al.
patent: 5682738 (1997-11-01), Barber

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