Siemens Makes Supersized CO2 Compressors

Machines for Chinese plant are largest ever


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Siemens is manufacturing four large integrally geared compressors for the Shenhua Ningmei Coal Group for installation at a 4.4 million tons/yr (4 million Tpy) coal liquefaction plant in Ningxia Province.

In 2009, Siemens supplied Shenhua with similar but smaller CO2 compressors for a coal plant in Yinchuan, Ningxia. They had a flow capacity of 2.3 Mscf/hr (83,000 Nm3/hr). The latest ones have a capacity of 4 Mscf/hr (141,000 Nm3/hr) and, according to the company, are the largest CO2 compressors built to date.

These integrally geared compressors, type STC-GV, feature six compression stages mounted back-to-back on three pinions arranged on the periphery of the main gearbox casing and directly coupled to the central bull gear.

The compression business unit within Siemens Energy Sector, at Duisburg, is due to deliver the compression systems in the summer of 2015. Prior to delivery, the compressor will be assembled and mechanically tested in Duisburg, Germany.

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