Supersonic ultrahigh pressure carbon dioxide compressor unit

Abstract

The invention discloses a supersonic ultrahigh pressure carbon dioxide compressor unit, and belongs to the field of shock wave compression. The compressor unit aims at solving the three technical problems existing in the prior art, mainly solves the defect that the pressure of a two-stage compression outlet cannot reach 50 MPa, and further solves the energy waste caused by air backflow to a compressor inlet during the ultrahigh-pressure stage starting period and the axial force balance and the bearing type of an extra-high-pressure and ultrahigh-rotation-speed rotor. According to the compressor unit, three-stage supersonic shock wave compression is adopted, two second stages are used for providing air for one third stage, and backflow does not need to be carried out during starting of a compressor. Due to the fact that the supersonic compression single-stage pressure ratio is large, the exhaust temperature of the first stage and the second stage is high, a heat exchanger is arranged, so that the problem that the sound velocity in the next stage of inlet air is increased and shock waves cannot be generated is solved. According to the compressor unit, the industrial application of low-cost and ultrahigh pressure carbon dioxide compressors to carbon dioxide capture and storage and enhanced oil recovery can be promoted.

Description

technical field [0001] The invention relates to a supersonic compressor, in particular to an ultra-high pressure carbon dioxide compressor using shock wave compression technology. Background technique [0002] China's energy characteristics are dominated by coal, and the total annual emission of carbon dioxide gas ranks second in the world. It is necessary to speed up the implementation of "carbon capture and storage" technology (CCS technology Carbon Dioxide Capture and Storage) in order to achieve Significant reductions in greenhouse gas emissions. Clean air is the natural environment for human beings to survive. [0003] In 2017, China's dependence on foreign oil rose to 67.4%. The issue of oil security is related to the safety of my country's economy and military. One of the countermeasures is "enhanced oil recovery" technology (referred to as EOR technology Enhanced Oil Recovery). my country's current EOR technology mainly uses multi-stage centrifugal pumps in series ...

AI Technical Summary

Problems solved by technology

[0059] The object of the present invention is to: aim at the technical problems existing in the existing supersonic compressors, to provide a CO2 pump that can meet the injection pressure of up to 50MPa for ultra-deep oil reservoir development. 2 gas demand to facilitate low-cost, ultra-high pressure CO 2 The supersonic ultra-high pressure carbon dioxide compressor unit industrialized in the "Carbon Capture and Storage" and "Enhanced Crude Oil Recovery" projects came out soon

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