Studies of Thermochemical Heat Recovery of Exhaust Gases of Furnaces

Abstract

The review of schemes and methods of thermochemical heat recovery (TCR) of exhaust flue gas for different power plants operating on hydrocarbon fuels have been performed. The essence of the heat of flue gases TCR is to use their physical endothermic heat for pre-processing the original hydrocarbon fuel, which thus receives a greater supply of chemically bound energy in the form of increased heat of combustion. If the traditional VTU, energy of fuel is converted into heat in one stage by direct incineration, in plants with TCR the process of transformation of the fuel energy is divided into two stages. The first stage is the heating of the reaction mixture and carrying out endothermic reactions of the initial fuel conversion, resulting in an increase in its calorific value. The second stage is burning of the reaction products, i.e., reformed gas having a large heat of combustion compared to the original fuel.