STC-SH Siemens Turbocompressor – Single Shaft, Horizontally split casing Robust and dependable Siemens single shaft centrifugal compressors with horizontally split casings in the STC-SH series can be used for the majority of process applications. Appropriate for process requirements such as medium pressures and large volume flows, the STC-SH is the preferred compressor for e.g. cracked gas, coker gas, process air or carbon dioxide. The STC-SH is also available with an overhung impeller – a lower-cost alternative design for large volume applications especially with steam turbine drive. Designed in accordance with API 617, this product line corresponds with all technical requirements imposed by the market. With the integration of Siemens Turbomachinery Equipment, the STC-SH series was extended and now even covers chlorine applications. Highlights The perfect match for most process applications, especially for toxic and inflammable gases, contaminated gases and low temperature services Flexible design concept combines custom-tailored design with standardized components for maximum reliability Easy access to compressor internals Siemens Turbocompressors Answers for energy. Fields of Applications Petrochemicals Olefins Refineries - Wet gas - Coker gas Fertilizers General chemicals - Dry chlorine gas On- /Offshore Oil & Gas, such as: - Boil Off Gas (BOG) - End Flash Gas (EFG) - Sour Gas (gas gathering, gas /oil separation) Design Concept STC-SH Flexible adaptation The design concept of STC-SH compressors is very flexible, allowing easy adaptation to the requirements of specific process applications (e. g. oil or water injection). Casings are mostly fabricated, but can also be cast for special applications (e.g. low temperature). Stator parts (e.g. return vanes) are 100 percent machined, thus ensuring high aerodynamic predictability. The horizontally split casing split permits easy access to all compressor internals by simply removing the upper half of the casing. These centrifugal compressors can be equipped with up to ten impellers, divided into up to four process stages per casing. Designs include straight through, doubleflow and back-to-back configurations. A well-proven, fully parametric aerodynamic design, based on comprehensive in-house research and development, allows for the perfect matching of compressor performance and rotor dynamics for any application. Compressors of the STC-SH series are project-specifically designed to meet individual customer needs. Besides conventional oil-lubricated tilting pad bearings, active magnetic bearings can be used, allowing 100 percent oil-free operation of compression trains in combination with electric motors, which also have magnetic bearings. Designed to handle dry chlorine A special design was developed to compress dry chlorine gas up to 12.5 bar. This machine type with two up to four stages comprises a three-chamber labyrinth shaft sealing, intercoolers, a separate oil system, variable inlet guide vanes and gear (skid mounted with compressor). Typically, STC-SH for dry chlorine is driven by an electric motor. Steam turbine-driven propylene compressor with piping and auxiliaries 1. 2. 1. Horizontally split casing with assembled rotor. 2. Rotor of an STC-SH for dry chlorine gas. Highlights The first stages of all casing sections can be equipped with adjustable inlet guide vanes (IGV) allowing additional throughput and optimum turndown with maintained high efficiency Dry gas seals, whether single, double or tandem, are used as standard as shaft end seals Up to four process stages with up to ten impellers Intercooling and sidestreams Easy access to internals 100 percent machined stator parts Active magnetic bearings as a referenced option Control Systems Perfect protection and process control via flexible Siemens control systems: Anti-surge protection Performance controllers acting on mass flow, suction- or discharge-pressure Controlled by either throttling, bypass operation or speed variation, thus operation with all available drive systems, i.e. electric motors, steam and gas turbines Fully- or semi-automatic start-up- and shutdown sequences exactly matched to your process demands Certified safety systems available Local and remote control Load-sharing controller for parallel trains Technical Data STC-SH Impeller diameters 225 –1,900 mm Volume flows from 250 to 600,000 m³/h (147 to 353,000 cfm) Discharge pressure for oxygen and inert gas up to 100 bar (1,450 psi) Discharge pressure for hydrocarbon gases up to 50 bar (725 psi) Discharge pressure for chlorine gases up to 12.5 bar (181 psi) Speed up to 20,000 rpm Driver: Depending on process and energy resources – Steam turbine, gas turbine or electric motor Benefits Based on flexible design and reliable technology, Siemens STC-SH compressors optimize your process compression business. The benefits of this product line are: Compression of a comprehensive range of process gases The tailor-made solution for individual customer specifications Robust and dependable compressor design Easy maintenance Application range STC-SH 100 1000 08 50 09 * 500 Speed min -1 Discharge pressure p-bar Frame size 05 06 08 10 12 14 17 20 23 p.psi 21,000 10 Speed range 100 15,000 5 50 9,000 3,000 1 0 10 0,4 . V.1,000 m3 / h 1 0,5 1 . V.1,000 cfm 10 50 10 100 50 500 100 280 *Special design for dry chlorine Actual suction flow rate Published by and copyright © 2008: Siemens AG Energy Sector Freyeslebenstrasse 1 91058 Erlangen, Germany Siemens AG Energy Sector Oil & Gas Wolfgang-Reuter-Platz 47053 Duisburg, Germany www.siemens.com/energy Siemens Energy Inc. 10730 Telge Road Houston, Texas 77095, USA For more information, please contact our Customer Support Center. Phone: +49 180 524 70 00 Fax: +49 180 524 24 71 (Charges depending on provider) E-mail: firstname.lastname@example.org Oil & Gas Division Order No. E50001-G420-A110-X-4A00 Printed in Germany Dispo 05400, c4bs 1388, 4497 S WS 10085 Printed on elementary chlorine-free bleached paper. All rights reserved. Trademarks mentioned in this document are the property of Siemens AG, its affiliates, or their respective owners. Subject to change without prior notice. The information in this document contains general descriptions of the technical options available, which may not apply in all cases. The required technical options should therefore be specified in the contract.
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