Multipressure stripping for aqueous absorption / stripping for an acid gas removal from gases

AN ACID GAS SUCH AS CARBON DIOXIDE, HYDROGEN SULFIDE, OR A MIXTURE THEREOF IS REMOVED FROM GASEOUS STREAMS USING AQUEOUS ABSORPTION AND STRIPPING PROCESSES. BY REPLACING THE CONVENTIONAL STRIPPER USED TO REGENERATE THE AQUEOUS SOLVENT AND CAPTURE THE ACID GAS WITH A MULTIPRESSURE STRIPPER THAT COMBINES ACID GAS COMPRESSION WITH STRIPPING, LESS ENERGY IS CONSUMED. THE MULTIPRESSURE STRIPPER IS A MULTISTAGE FLASH IN WHICH THE TOTAL VAPOR FLOW FROM EACH STAGE IS COMPRESSED AND FED TO THE BOTTOM OF THE PREVIOUS FLASH STAGE AT A HIGHER PRESSURE. IN THIS PROCESS, THE HEAT IN THE WATER CONTENT OF THE VAPOR EXITING EACH STAGE IS UTILIZED AT A HIGHER PRESSURE IN THE PREVIOUS STAGE. THE DESCRIBED STRIPPING PROCESS GENERATES THE ACID GAS AT A HIGHER PRESSURE WITHOUT OPERATING THE STRIPPER AT A HIGHER TEMPERATURE, THEREBY REDUCING THE ENERGY CONSUMPTION OF THE SYSTEM.