| Autors: Iliya Iliev., Terziev, A. K., Milen Venev., Emilian Velkov. Title: Technical–economical analysis of the air heater when switching coal from natural gas Keywords: technical analysis, fuel switch Abstract: This work consists of an analysis of the economical feasibility of introducing air heaters to energy steam generators, which is extremely important and is usually directly related to the saving of combustion resources in the process of waste heat utilization. A project for the introduction of an additional AH-TS steam heater for steam generators No 1 and 2 in the „Pernik“ Ltd heating plant was described for the purpose of lowering the exhaust gas temperature from 220 °C to about 180 °C, The efficiency of the steam generator by about 2-2.5%. It has been found that the use of an air heater with thermosyphons as a waste heat exchanger leads to significant fuel savings and increases boiler efficiency. The air heater with thermosyphons has shown steady performance over a long period of time. The use of an air heater with gas-fired thermosyphons leads to significantly higher savings and, respectively, to a shorter payback period than to solid fuel. A more significant reduction of CO2 emissi References Issue
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Вид: публикация в национален форум
