Global Patent Index - EP 2401478 A1

EP 2401478 A1 2012-01-04 - HIGH EFFICIENCY WASTE TO ENERGY POWER PLANTS COMBINING MUNICIPAL SOLID WASTE AND NATURAL GAS

Title (en)

HIGH EFFICIENCY WASTE TO ENERGY POWER PLANTS COMBINING MUNICIPAL SOLID WASTE AND NATURAL GAS

Title (de)

HOCHLEISTUNGS-WTE-KRAFTWERKE (WTE-WASTE TO ENERGY) UNTER KOMBINATION VON FESTEM HAUSMÜLL UND ERDGAS

Title (fr)

DÉCHET HAUT RENDEMENT POUR CENTRALES ÉLECTRIQUES COMBINANT DES DÉCHETS SOLIDES MUNICIPAUX ET DU GAZ NATUREL

Publication

EP 2401478 A1 (EN)

Application

EP 08878195 A

Priority

BR 2008000347 W

Abstract (en)

[origin: WO2010057279A1] Corrosion is avoided by using an external superheater heated by the clean gas exhaust coming from the internal combustion machine (ICM) mixed with pure air, with duct firing to adjust the steam superheating temperature, in the same way the existing natural gas/waste power plant do. The difference in the proposed patent is that the ICM is chosen not to match the steam amount produced in the waste boiler, which is superheated to a corrosion safe temperature say 400 C or less, but just to provide the plant own power consumption. We need to increase this ICM exhaust flow with pure air and use duct firing (11,12) to raise the gas mixture temperature, say between 600 C and 700 C, high enough to superheat the steam in the external superheater (3) to approximately 500 C. If we use pure air at ambient temperature, the amount of natural gas in the duct burners (11,12) will be very high decreasing the natural gas efficiency. To reduce the natural gas consumption in the duct burner (11,12) we use the hot gas leaving the external superheater (3), around 420 C, to preheat the ambient air to say 390 C, in a air/gas heat exchanger (13), before it is mixed with the ICM exhaust, increasing the mixture temperature to a value close to 400 C, reducing drastically the natural gas consumption in the duct firing (11,12).

IPC 8 full level (invention and additional information)

F01K 3/24 (2006.01); F01K 23/10 (2006.01); F22G 1/16 (2006.01)

CPC (invention and additional information)

F01K 7/22 (2013.01); F01K 13/00 (2013.01); F22B 1/1807 (2013.01); F22B 1/1861 (2013.01); F22D 1/36 (2013.01); F22G 1/16 (2013.01); Y02E 20/12 (2013.01); Y02E 20/16 (2013.01)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

EPO simple patent family

WO 2010057279 A1 20100527; EP 2401478 A1 20120104; EP 2401478 A4 20170809

INPADOC legal status


2014-05-14 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: RIBEIRO, SERGIO VIEIRA GUERREIRO

2014-05-14 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: WATERLEAU GROUP NV

2014-05-14 [RIN1] INVENTOR (CORRECTION)

- Inventor name: RIBEIRO, SERGIO VIEIRA GUERREIRO

2014-01-15 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: WATERLEAU GROUP NV

2014-01-15 [RIN1] INVENTOR (CORRECTION)

- Inventor name: WATERLEAU GROUP NV

2012-02-29 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) DELETED

2012-01-04 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20111121

2012-01-04 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR