Global patent index - EP 1078203 A1

EP 1078203 A1 2001-02-28 - METHOD FOR THE HEAT TREATMENT OF SOLIDS

Title (en)

METHOD FOR THE HEAT TREATMENT OF SOLIDS

Title (de)

VERFAHREN ZUR THERMISCHEN BEHANDLUNG VON FESTSTOFFEN

Title (fr)

PROCEDE DE TRAITEMENT THERMIQUE DE MATIERES SOLIDES

Publication

EP 1078203 A1 (DE)

Application

EP 99917726 A

Priority

  • EP 99917726 A
  • CH 9900192 W
  • EP 98810424 A
  • EP 98810570 A

Abstract (en)

[origin: WO9958902A1] The invention relates to a method for the heat treatment of solids (3), especially waste products, during which the solids (3) in a first stage (5) are burnt/gasified or pyrolysed in the presence of an oxygen deficiency, after which the exhaust gases (6) resulting from the first stage (5) are mixed in a secondary combustion chamber (14) with an oxygenated gaseous medium (15) and are fully burnt. Before being mixed with the oxygenated medium the exhaust gases (6) resulting from the first stage (5) are actively homogenized in a mixing stage (7) with addition of a gaseous medium (8) containing little or no oxygen. The homogenized exhaust-gas stream then passes through a steady-state zone (13) in which it remains for at least 0.5 seconds before the medium (15) is added in a secondary combustion stage (14) to ensure that the exhaust gas is fully burnt. The method provided for in the invention is characterized by simple process steps and a reduced content of pollutants, notably NOx, in relation to prior art.

IPC 1-7 (main, further and additional classification)

F23G 5/14; F23G 5/30; F23L 7/00

IPC 8 full level (invention and additional information)

F23G 5/027 (2006.01); F23G 5/00 (2006.01); F23G 5/14 (2006.01); F23G 5/16 (2006.01); F23G 5/30 (2006.01); F23L 7/00 (2006.01)

CPC (invention and additional information)

F23G 5/30 (2013.01); F23G 5/165 (2013.01); F23L 7/00 (2013.01); F23L 7/005 (2013.01); F23G 2202/101 (2013.01); F23G 2203/10 (2013.01); F23L 2900/07002 (2013.01); Y02E 20/344 (2013.01)

Citation (search report)

See references of WO 9958902A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB IT LI NL SE

EPO simple patent family

WO 9958902 A1 19991118; CA 2332011 A1 19991118; CN 1218141 C 20050907; CN 1300359 A 20010620; EP 1078203 A1 20010228; HU 0102798 A2 20011228; HU 0102798 A3 20021128; JP 2002514732 A 20020521; US 6336415 B1 20020108

INPADOC legal status

2002-07-31 [18R] REFUSED

- Ref Legal Event Code: 18R

- Effective date: 20020312

2002-01-02 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: ALSTOM (SCHWEIZ) AG

- Ref Legal Event Code: RAP1

2001-12-12 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: ALSTOM

- Ref Legal Event Code: RAP1

2001-08-08 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20010626

2001-02-28 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001021

2001-02-28 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE DK ES FI FR GB IT LI NL SE