Steam Turbine SST-600
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Steam Turbine SST-600
The SST-600 is a single casing steam turbine, designed for operation with speed ranging from 3,000 to 18,000 rpm for generator or mechanical drives up to 150 MW. The turbine is used for both condensing and back-pressure applications, either geared or directly coupled.
Typical fields of application are chemical and petrochemical industry, pulp and paper mills, steel works, mines, power plants, seawater desalination plants and waste-to-energy, e.g. waste incinerators. The SST-600 is used as:
The innovative, improved Enhanced Platform technology is now standard design for the SST-600. The turbine with front steam admis-sion offers the possibility of up to eight bleeds with various pressure levels, or up to five bleeds in combination with two controlled extractions up to 45 bar for internal controlled extraction and 72 bar for external controlled extraction.
|Power output||up to 150 MW|
|Inlet steam pressure||up to 165 bar / 2,395 psi|
|Inlet steam temperature||up to 565 °C / 1,049 °F|
|Rotational speed||3,000 to 18,000 rpm|
|Bleeds||up to 8, at various pressure levels|
|Controlled extraction||pressure: up to 72 bar (a) / 1,044 psi|
|Exhaust steam conditions||pressure: up to 72 bar (a) / 1,044 psi|
All data are approximate and project-related.
|SST-600 - Enhanced Platform Design||SST-600 - Building Block Design|
|Single casing||Single casing|
|Customized steam path||Customized steam path|
|Axial or radial exhaust||Axial or radial exhaust|
|Direct coupled or geared||Direct coupled or geared|
|Remote control||Remote control|
|Proven, reliable and flexible design||Proven, reliable and flexible design|
|Improved HP and IP blading|
|Increased efficiency (lower flow losses)|
|Reduced start-up times due to quicker turbine
|Faster load changes|
|Enhanced availability due to simplified
|Redesigned valve/casing arrangement to
avoid internal and external sealing problems
|Compacter design for simplified transportation|
The steam turbine SST-600 consists of three main modules: inlet, intermediate and exhaust sections. The complex inlet section consists of emergency stop valve, control valve, internal casing with blading and external casing. The intermediate section can be designed for straight flow, or equipped with bleeds and/or controlled extractions. A wide range of exhaust sizes and types is available for back-pressure and condensing applications. These pre-designed modules are combined to a single unit for optimum matching of the required parameters.
The SST-600 is a single casing turbine with front admission that is suitable for condensing operation as well as for back-pressure operation up to 72 bar. Features such as a horizontal casing split, independently accessible bearings etc., ensure easy and rapid maintenance. Additionally, the guide blade carriers enable easy maintainability or further modifications of the steam path.
SST-600 Enhanced Platform
The SST-600 steam turbine is available in two design options: The innovative, improved Enhanced Platform technology and its predecessor, the well-established and proven Siemens Building Block design.
The advanced and innovative SST-600 Enhanced Platform design combines the best of the existing Siemens steam turbine technologies from the SST-300, SST-400, SST-600, and SST-800 turbine families, e.g., it incorporates features from the proven, well-established Siemens Building Block design as well as from acquired steam turbine technology.
All alternative designs are created out of pre-designed inlet casings which are combined with various emergency stop valves, control valves, extraction parts, flexible middle sections and exhaust casings. The inlet parts are split into low-pressure and high-pressure, as well as some flexible middle section parts. The improved inlet section, with internally arranged control valves was engineered to get a more compact turbine, compared to the Siemens building block design.
For direct-coupled turbines or mechanical drives, the SST-600 core turbine is mounted on a separate base frame, for geared turbines the turbine is placed on a common base frame together with a gearbox. For smaller condensing sizes, even the condenser can be integrated in the base frame. For the conventional package arrangement with downward exhaust for back-pressure, condensing applications and large direct-coupled generator drives, the turbine stands on a pedestal-type support. For ground-level installation the turbine is equipped with axial or upward exhaust.
Length (L): 19 m / 62 ft.
Width (W): 6 m / 20 ft.
Height (H): 5 m / 16.4 ft.