| (19) |
 |
|
(11) |
EP 0 317 111 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
07.03.1990 Bulletin 1990/10 |
| (43) |
Date of publication A2: |
|
24.05.1989 Bulletin 1989/21 |
| (22) |
Date of filing: 31.10.1988 |
|
|
| (84) |
Designated Contracting States: |
|
DE ES FR GB IT NL |
| (30) |
Priority: |
18.11.1987 US 122067
03.10.1988 US 252681
|
| (71) |
Applicant: RADIAN CORPORATION |
|
Austin, TX 78720-1088 (US) |
|
| (72) |
Inventor: |
|
- Bell, Ronald D.
Austin
Texas 78759 (US)
|
| (74) |
Representative: Read, Matthew Charles et al |
|
Venner Shipley & Co.
20 Little Britain
London EC1A 7DH
London EC1A 7DH (GB) |
|
| |
|
| (54) |
Low nox incineration process for hazardous waste |
(57) A process which involves incinerating (202) hazardous waste (206) to produce a gaseous
stream, adding combustible material to produce a combustible gas stream having combustible
material in excess of the oxygen in the combustible gas stream, incinerating (204)
the combustible gas stream in a reducing atmosphere to produce a heated oxygen-depleted
gaseous stream (224), converting at least a portion of the heat in the oxygen depleted
stream into steam (216), adding air to the oxygen depleted stream to produce a stoichiometric
excess of oxygen in the resultant stream relative to combustible material present
in the resultant stream, passing the resultant stream over an oxidizing catalyst (226)
to produce an oxidized gaseous, stream, removing heat (228) from the oxidized stream,
and venting (232) the resultant cooled stream. A system for carrying out the foregoing
process is also provided.