This paper will give an update of the commercial status of ISAB Energy (approx. 510 MWe) and Sarlux (approx. 550 MWe), i.e. the two Italian IGCCs built by Snamprogetti in consortium respectively with Foster Wheeler Italiana and with Nuovo Pignone/General Electric.
ISAB Energy has been the first Italian IGCC to go in commercial operation and has been taken over by the Owner on April 2000, while for Sarlux this happened on January 2001.
The Two Projects The main features of the two IGCC are herebelow reported: Isab Energy The guaranteed electrical production is approximately 510 MWe from asphalt gasification (approx. 130 t/h).
The project is executed by a Consortium formed by Snamprogetti and Foster Wheeler Italiana.
The split of work between SP and FWI is "vertical" for the engineering and procurement activities, while the construction, commissioning and other field activities are directly under the Consortium responsibility.
The Combined Cycle Unit is supplied ready at site by Ansaldo Industria.
Sarlux The guaranteed electrical production is approximately 550 MWe with co-production of approximately 40,000 Nm3/h of Hydrogen and 180 t/h of medium and low pressure steam. The normal feedstock to the gasification is Tar (approx. 150 t/h).
A Consortium formed by Snamprogetti with Turbotecnica (Nuovo Pignone) and General Electric executed the project.
The split of work among the parties is completely "vertical" being SP responsible for the supply of the process and utilities units, and NP/GE for the combined cycle.
When the two IGCC are in operation, their total power production of more than 1000 MWe corresponds to about 3.5% of the Italian production, on annual basis.
Isab Energy And The Integrated Gasification Combined Cycle (IGCC) configuration is shown herebelow in the Sarlux: Main Differences Process Block Diagram and is known to this audience (see for example the paper presented last BLOCK 2 - - FORUM 12 497
year - Reference 1). It is very similar in both Italian Snamprogetti projects. The main differences will be highlighted in the text.
IGCC Complex Process Block Diagram
SOLIDS TO DISPOSAL WASTE WATER TO AIR WASTE WATER SULPHUR BIOTREATMENT AIR OXYGEN SULPHUR SEPARATION PRETREATMENT RECOVERY UNIT NITROGEN (STEAM TO EXPORT) HYDROGEN SULPHIDE FEEDSTOCK SYNGAS GAS COOLING SULPHUR FEEDSTOCK PREPARATION GENERATION AND AND COS REMOVAL SOOT EXTRACTION HYDROLYSIS STEAM BOILER FEED ELECTRIC (EXPANDER) POWER COMBINED CYCLE SYNGAS (HYDROGEN (STEAM TO (HYDROGEN) EXPORT) UNIT SATURATION PRODUCTION) DEMIWATER (SYNGAS TO POST FIRING) DESALTED DEMIWATER WATER PRODUCTION
Fig. 1 · The oxygen necessary for the partial ox
