Open AccessEconomic Analysis of Low-pressure Economizer Retrofit on 670t/h Coal-fired Unit
Author(s) -
Xingang Zhou,
Xinyuan Huang,
Lirong Ding,
Liu Jinglong,
Chuanjun Duan
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/512/1/012006
Subject(s) - economizer , flue gas , flue gas desulfurization , coal , pressure drop , boiler (water heating) , waste management , environmental science , engineering , mechanical engineering , thermodynamics , physics , heat exchanger
After long operation, heat transfer characteristics and flue gas pressure drop of low-pressure economizer are deviated from design value seriously. Through low-pressure economizer retrofit on a 670t/h coal-fired unit, the flue gas pressure drop is decreased to 597.04pa, less than the guarantee value 750Pa, the water saving of desulfurization spraying is 25.92t/h, the reduction of coal consumption for power generation is 2.80g/kW·h. Its energy-saving effect is obvious and transformation expectation is achieved.