Gas Compression Process

Abstract

Example embodiments for a method for compressing gas into a liquified gas using a plurality of pairs of liquid gas displacers in parallel moving a working fluid between each pair of displacers to pressurize the gas, arranging sets of the parallel liquid gas displacers in a series to raise the pressure, directly cooling the gas at each displacer pair, and finally condensing the gas using a coolant, collecting the liquified gas, and pressurizing the liquified gas for use in a pipeline.

What is claimed is: 
     
         1 . A method for compressing gas comprising:
 compressing a gas at a first stage compressor to create a first compressed gas;   cooling the first compressed gas;   compressing the first compressed gas at a second stage compressor to create a second compressed gas;   cooling the second compressed gas;   compressing the second compressed gas at a third stage compressor to create a third compressed gas;   cooling the third compressed gas;   compressing the third compressed gas at a fourth stage compressor to create a fourth compressed gas;   cooling the fourth compressed gas;   condensing the fourth compressed gas into a liquified gas;   collecting the liquified gas;   pressuring the liquified gas;   delivering the liquified gas into a gas line.   
     
     
         2 . The method for compressing gas of  claim 1  wherein the gas is CO 2 . 
     
     
         3 . The method for compressing gas of  claim 1  wherein the first stage compressor is a plurality of pairs of displacement vessels each pair having a dedicated pump. 
     
     
         4 . The method for compressing gas of  claim 1  wherein the second stage compressor is a plurality of pairs of displacement vessels each pair having a dedicated pump. 
     
     
         5 . The method for compressing gas of  claim 1  wherein the third stage compressor is a plurality of pairs of displacement vessels each pair having a dedicated pump. 
     
     
         6 . The method for compressing gas of  claim 1  wherein the fourth stage compressor is a plurality of pairs of displacement vessels each pair having a dedicated pump. 
     
     
         7 . The method for compressing gas of  claim 1  wherein the first stage compressor includes a plurality of centrifugal pumps. 
     
     
         8 . The method for compressing gas of  claim 1  wherein the cooling of the first gas includes using a plurality of discharge coolers. 
     
     
         9 . The method for compressing gas of  claim 1  wherein the cooling of the second gas includes using a plurality of discharge coolers. 
     
     
         10 . The method for compressing gas of  claim 1  wherein the cooling of the third gas includes using a plurality of discharge coolers. 
     
     
         11 . The method for compressing gas of  claim 1  wherein the cooling of the fourth gas includes using a plurality of discharge coolers. 
     
     
         12 . The method for compressing gas of  claim 1  wherein the condensing of the fourth gas includes using a plurality of chillers to chill water that is circulated with the gas to condense it. 
     
     
         13 . The method for compressing gas of  claim 1  wherein the compressing of the liquified gas includes using a plurality of pumps to increase the pressure. 
     
     
         14 . A method for liquifying carbon dioxide comprising:
 Receiving carbon dioxide gas from a source;   Compressing the carbon dioxide in a plurality of pairs of displacer vessels placed in a parallel configuration to form a stage;   Cooling the gas using a plurality of discharge coolers, one for each pair of displacer vessels;   Compressing the carbon dioxide using a series of stages in a linear configuration, wherein the pressure of the carbon dioxide is increased and cooled with each stage until the carbon dioxide becomes a liquid; and   Pumping the liquid carbon dioxide to a pipeline.   
     
     
         15 . The method for liquifying carbon dioxide of  claim 14  wherein the pumps for each of the plurality of pairs of displacer vessels is a centrifugal pump. 
     
     
         16 . The method for liquifying carbon dioxide of  claim 14  wherein the pumps for each of the plurality of pairs of displacer vessels is a vertical wet pit mixed pump. 
     
     
         17 . The method for liquifying carbon dioxide of  claim 14  further comprising cooling the gas using a plurality of chillers to chill a coolant fluid and then circulating the coolant fluid with the gas. 
     
     
         18 . The method for liquifying carbon dioxide of  claim 14  further comprising condensing the gas to liquified gas using chilled water in a plurality of displacers. 
     
     
         19 . The method for liquifying carbon dioxide of  claim 18  further comprising pressurizing the liquified gas using a plurality of pumps. 
     
     
         20 . A method for gas comprising:
 receiving gas from a source;   compressing the gas a plurality of pairs of displacer vessels placed in a parallel configuration to form a stage, wherein a working fluid is pumped alternatively into the pairs of displacer vessels to pressurize the gas;   cooling the gas using a plurality of discharge coolers, one for each pair of displacer vessels;   compressing the gas using a series of stages in a linear configuration, wherein the pressure of the carbon dioxide is increased and cooled with each stage until the carbon dioxide becomes a liquid;   chilling a coolant and then circulating that coolant within a final stage to produce liquified gas;   collecting the liquified gas;   pressurizing the liquified gas using a plurality of pumps; and   pumping the liquid carbon dioxide to a pipeline.