STC-GO for Aeration
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STC-GO for Aeration
Single Stage Turbocompressors
Siemens offers a full range of turbocompressors to meet the needs of the metallurgical, oil & gas and chemical industries. Single-stage compressors and blowers with separate or integrated gearboxes can be matched with a range of drivers – steam turbine or electric – in solutions to suit each individual customer. Siemens is one of the leading turbo machinery manufacturers with over 100 years' experience, a track record of continuous development, and an installed base of more than 4,000 turbocompressors and turboblowers. We are the ideal partner for your business.
With our unrivalled competence in compressor unit solutions from a single source, Siemens offers a comprehensive range of pre-designed turbo compressor up to 353.400,00 cfm, with the flexibility to address the specific requirements for your application (Siemens Turbocompressor – STC™).
Our standard units with modular design ensure low investment costs and shortest delivery times.
Metallurgical, chemical and petrochemical plants as well as refineries are amongst the most common applications for our compression solutions.
We strictly adhere to the guidelines laid down in the quality standards ISO 9001 and ISO 14001. Not only the turbocompressors and blowers, but also associated field-proven high-tech products are available in the Siemens range. These include steam turbines and electric drivers, instrumentation and controls, as well as auxiliary and ancillary systems.
Siemens turbocompressors are designed and manufactured for challenging industrial applications:
Petrochemicals and Refineries
The design of turbocompressors meets the customer’s requirements, such as:
Siemens designs and manufactures high-performance aeration technology for municipal wastewater treatment and industrial applications.
The efficient STC-GO compressors are made uniquely according to plant specifications thereby consuming significantly less energy compared to other compressor designs. The high quality compressor components and the conformity with technical standards for a broad range of applications ensure long-term reliability and minimum maintenance.
With more than 7000 of units operating worldwide, Siemens has become the market leader within its specific application areas.
Highest efficiency is automatically and continuously maintained over the entire turndown range, including off-design ambient temperatures and pressures where units most often operate.
Biological treatment of effluent in:
Oxidation air blowers associated with the cleaning of flue gases produced within power and heavy industry.
Biochemical treatment within pharmaceutical and yeast production industry and similar biological processes.
Air blowers providing combustion or reaction air primarily for the petrochemical and metals industries.
Air blowers providing reaction air for the catalytic recovery of sulphur within the petrochemical industry.
The Siemens STC-GO compressor has an advanced mechanical & aero-dynamical design and cutting edge control system. The air-end and integral gearbox have been developed and evolved after 30 years of manufacturing experience creating the most high efficient air compressor today in the market.
A proper designed compressor is customized to site conditions, consuming minimal required power. Compressors may be controlled by variable inlet guide vanes, variable diffusers, or both. The choice between the different control systems is based on variable flow rate demand, the discharge pressure and ambient conditions.
Core of the compressor is the impeller, which is machined from a solid forged piece of high grade aluminum alloy originating from the aircraft industry, with an optimal weight/strength ratio. The design- and fabrication method for the semi-open 3-dimensional impeller is easily adopted to meet individual plant requirements. The impeller design is based on a huge database comprising full factory tests of more than 7,000 compressors as well as dedicated full scale tests and finite element analyses.
The variable diffuser system controls the flow by adjusting the angle and consequently the nozzle area of 17 to 21 diffuser vanes. The vanes are flow optimized nonsymmetrical airfoils, allowing adjusting the nozzle area and still maintaining an excellent efficiency within the whole operation range of the compressor. The vanes are arranged radially around the impeller.
The inlet guide vane system (IGV) controls the incidence angle of the inlet flow to the impeller and thus influences the relative speed of the air. This allows the possibility to adjust the delivered head from the compressor and optimize the power consumption according to changes in operational parameters such as inlet temperature, outlet pressure etc.
The STC-GO series are single stage compressors with integrated gearboxes. Compressor and gearbox are standard fully integrated with vertical split and the pinion shaft above the drive shaft.The design is compact and easy to maintain. All gearwheels are customized according to compressor configuration.
The gears are helical cut from high grade steel alloy, case hardened and grinded to close tolerances. The bearings are hydro-dynamic multi pad bearings with forced oil lubrication. The designed bearing life-time is 100,000 operational hours. The design ensures easy access to vibration and temperature probes, which can be delivered optionally. The air- and oil seals are non contact labyrinth type. Gears and bearings are pressure lubricated by electrically and mechanically driven pumps. The GL-gearboxes allows for higher flow and higher pressure within the range of STC-GO compressors and extend the maintenance intervals.
This design is mainly used for electric motor driven applications at any operational condition.
Aeration requirements in smaller decentralized waste water treatment plants are often associated with special needs with regard to compressor design and performance. Ideal for smaller scale plants, the GK series features a particularly com-pact design. with integrated gearbox featuring ball bearings, lubricated by an integrated oil pump.
The special GC-type is a planetary two stage co-axial gearbox for applications with diesel or gas engine drivers, for in-stance with methane recovery processes. This type of gearbox is designed for the increased torsional forces originating from the driver. The GB-type is a two-step gearbox specially suited for high pressure.