POWER PARAMETERS OF VARIOUS PROCESSES OF COMPRESSION OF CARBON DIOXIDE UP TO OVERCRITICAL PRESSURE

Abstract

Carbon dioxide is widely applied in tonnage chemistry for manufacturing the carbamide. For this purpose the gaseous carbon dioxide compress in the multistage compressor up to overcritical pressure 15 MPа and submit to the plant of synthesis of carbamide. The specific consumption of the electric power on compression of carbon dioxide under such compressor circuit makes 0,15 кW×h/kg. The analysis of the circuit of compression of СО2 shows that the application in practice of compressor-pump circuit of compression of carbon dioxide is energetically favourable from the point of view of economy of the electric power and increase of reliability and safety of the maintained equipment. Various variants of circuits are considered. The specific consumption of electric power on compression of carbon dioxide up to 15 МPа in the compressor-pump circuit makes 0,11 кW×h/kg. In comparison with the compressor circuit the transition to the compressor-pump circuit will allow to save up to 20–30 % of the electric power that testifies to high efficiency of the offered circuits of compression СО2.