THE ENERGOTECHNOLOGICAL PLANTS ON NATURAL GAS WITH CO-GENARATION AND POWER-TURBINE SYSTEMS FOR MANUFACTURE OF THE ELECTRIC ENERGY, LIQUID CARBON DIOXIDE AND GASEOUS NITROGEN

Abstract

The carbon dioxide is requisite product. It can be receive from the flue gases formed after the burning of natural gas. The analysis shows that is more profitable, at first, to make the electric power and heat in co-generation plant working on natural gas, the second, in steam power plant working due to high temperature potential of flue gases to make the additional electric power. There are some problems during creation of such systems: products of combustion after co-generation unit contain of 8–10% of oxygen; the potential of received heat appears not sufficient for production of carbon dioxide from solution of absorbent. Some variants of elimination of the specified defects are offered. It has allowed to creating the independently and effectively working multi-purpose energotechnological plants using only natural gas, with the purpose of manufacture of electric and thermal energy, liquid low-temperature carbon dioxide and pure gaseous nitrogen. In such complexes the efficiency use of energy of starting fuel on 21,7 % more than in traditional units, and exergy efficiency is 58 %. At the same time the processes of manufacture of the electric power in complexes have anti-emission effect, unlike the traditional power stations with steam power plants.