Title:
SOOT WATER CLEANING BY MEANS OF PRESSURE FILTRATION
Document Type and Number:
WIPO Patent Application WO/2012/076305
Kind Code:
A3
Abstract:
In a pressure filtration system for cleaning residual quenching water of a gasifying device that gasifies carbon-containing fuels under elevated pressure, the soot water from the quencher is passed to a filter system (1), which has a number of pressure filter chambers operating alternately in filtering mode under gasifying pressure or in cleaning mode. The filtrate from the pressure filter chambers is passed to a quenching water reservoir, from which the quencher is fed with quenching water. This only entails small temperature and pressure losses with respect to the residual quenching water leaving, and only a small additional amount of energy has to be expended to overcome the remaining pressure difference to bring the filtrate that is to be returned back to the gasifying pressure. The invention, in which the residual quenching water is therefore cleaned substantially under gasifying pressure in a pressure filter, avoids flash evaporation of the residual quenching water into the vacuum area, with vapour cooling and a subsequent increase in pressure and reheating. In this way, the electrical energy requirement of the gasifying process itself can be reduced by orders of magnitude and the energy content and associated water content of the untreated gas can be set to the steam contents required for the CO shift reaction without additional amounts of heat being used up. This leads altogether to an improvement in the overall efficiency of IGCC and chemical synthesis processes. In an advantageous way, calcite precipitation is avoided in the soot water system, since no flash evaporation and preheating of the residual quenching water to be returned is required.
Inventors:
MEHLHOSE FRIEDEMANN (DE)
TAFFELT PETER (DE)
HANNEMANN FRANK (DE)
FISCHER NORBERT (DE)
PUTZ MIRKO (DE)
TAFFELT PETER (DE)
HANNEMANN FRANK (DE)
FISCHER NORBERT (DE)
PUTZ MIRKO (DE)
Application Number:
PCT/EP2011/070239
Publication Date:
August 30, 2012
Filing Date:
November 16, 2011
Export Citation:
Assignee:
SIEMENS AG (DE)
MEHLHOSE FRIEDEMANN (DE)
TAFFELT PETER (DE)
HANNEMANN FRANK (DE)
FISCHER NORBERT (DE)
PUTZ MIRKO (DE)
MEHLHOSE FRIEDEMANN (DE)
TAFFELT PETER (DE)
HANNEMANN FRANK (DE)
FISCHER NORBERT (DE)
PUTZ MIRKO (DE)
International Classes:
B01D29/00; C10J3/48; C10J3/78; C10J3/84
Domestic Patent References:
| WO2003022959A1 | 2003-03-20 |
Foreign References:
| JP2005097464A | 2005-04-14 |
Other References:
WALTER GÖSELE ET AL: "Filtration", 18 January 2012 (2012-01-18), pages 1 - 66, XP007920096, Retrieved from the Internet [retrieved on 20120118]
Attorney, Agent or Firm:
SIEMENS AKTIENGESELLSCHAFT (München, DE)
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