PERFECTION OF PLANTS FOR PRODUCTION OF THE LIQUID LOW-TEMPE-RATURE DIOXIDE CARBON FROM FLUE GASES. 2. DECREASE OF POWER CONSUMPTION IN CASCADE PLANTS OF AVERAGE PRESSURE

Abstract

The improvement of the energy characteristics of carbon dioxide refrigerating cascade system of average pressure is an actual problem. The analysis of its characteristics shows that they require the improvement on purpose to reduce energy consumption on the production of liquid low-temperature dioxide carbon. The liquid low-temperature dioxide carbon can be produced in carbon dioxide refrigerating cascade system of medium pressure. In the top of this system the absorption ammoniac refrigerating machine is used. It produces cold on level –40 ° C due to heat of flue gases, which are generated after burning fuel in the boiler unit. The discharge of electric power in such kind of carbon dioxide refrigerating cascade system can be practically reduced up to 0,1 kW•h /kg by using the carbon dioxide compressor of two-stage compression. The energy consumption on the liquid low-temperature dioxide carbon is reduced 40% in comparison with the carbon dioxide refrigerating cascade system which has  the compressor refrigerating machine in the top cascade.