Recently, multiple centrifugal CO₂ compressors custom-developed by Shaangu for a 2.64-million-kW new energy and supporting coal power and carbon capture integrated project of a customer in Northwest China have all been installed. The unit is a 13 MPa-class single-shaft centrifugal CO₂ compressor independently developed by Shaangu, and is China’s first high-pressure centrifugal CO₂ compressor applied in an oilfield carbon capture scenario. This marks a key breakthrough in the localization of core power equipment for CCUS in China’s oil and gas sector. With its hardcore technical strength, Shaangu injects strong momentum into a national-level low-carbon demonstration project.
Compared with conventional carbon capture equipment in power and coal chemical industries, oilfield storage scenarios have extremely high requirements for CO₂ compressor discharge pressure. Under high pressure, the physical properties of CO₂ gas are prone to abrupt changes, which can easily cause severe unit vibration, seal failure, and sharply increased operating losses. The core unit provided by Shaangu adopts globally advanced aerodynamic calculation technology, which can reduce compression power consumption compared with traditional projects while ensuring capture rate and product purity, and significantly improving long-term operational stability. It perfectly matches the stringent process requirements of long-distance CO₂ pipeline transportation and deep oil reservoir injection, becoming the first localized high-pressure centrifugal CO₂ compressor in China’s oilfield CCUS field.
As a green and low-carbon technology included in the Ministry of Industry and Information Technology’s Recommended Catalog of Energy-Saving and Carbon-Reducing Technology and Equipment in the National Industrial and Information Technology Field, Shaangu’s“CO₂ centrifugal compressor technology”utilizes high-precision CO₂ physical property calculation software to build centrifugal CO₂ compressors suitable for CCUS facilities with an annual scale of 150,000 to 3 million tons and a discharge pressure range of 2 to 20 MPa.Combined with short and thick dry gas seal design, nodal whip shaft, vortex suppression and other structures, it reduces aerodynamic force effects, improves unit operational stability, and with intelligent control technology, increases the unit’s polytropic efficiency to over 80%, reducing operating energy consumption. At present, this technology has been applied in power, chemical, energy extraction and other fields with remarkable results.
