Analysis Of Retrofit On Media Gas-Gas Heater Of A Coal-fired Power Plant

In recent years,with the rising price of coal,environmental protection requirements become more stringent,the cost of coal-fired power plants continue to increase,the power plant is facing enormous pressure on energy conservation,thermal power plant to carry out energy-saving technological transformation and emission ultra-low Transformation.Hot water pipe heat exchanger?MGGH?is one of the renovation project.Heat pipe water heat exchanger technology is to fully energy efficiency,environmental protection,the depth of the use of boiler exhaust heat a technology for the current power plant boiler exhaust temperature is too high,the technology has become a power plant to reduce smoke Temperature of the practical technology.In 1965 the United States Cotter put forward a complete set of heat pipe theory.After1974,heat pipe in energy conservation and new energy development research has been widely attention,with heat pipe heat exchanger to recover waste heat to save energy.In the 20th century began to promote the application of the 1990s.As Japan's environmental requirements are higher,thermal power emission control is particularly strict,to promote the birth of MGGH in Japan and get rapid development.Domestic technology manufacturers from the beginning of 2010 to gradually increase the heat medium water pipe flue gas heat transfer technology research and development efforts,is a useful exploration and try,600MW unit has been put into operation performance.In this paper,through the introduction of heat medium water tube heat exchanger technology to Heyuan power plant#2 unit design and operation of the transformation.By setting up MGGH transformation program design,control strategy,after the transformation of the operating conditions,the dust removal dust concentration,flue gas waste heat recovery,MGGH load adaptability,as well as the removal of SO₃ removal and the existence of some problems The application of this project was analyzed.Secondly,according to the characteristics of coal to calculate the flue gas dew point temperature,control the MGGH inlet condensate and hot media water temperature,to avoid the impact of low temperature corrosion,the use of heat balance and waste heat utilization concept,analysis of the installation of MGGH after the thermal system,Coal consumption,coal consumption rate,unit thermal efficiency and other thermal economic indicators.The design and operation of the thermal heat exchanger system for the installation of the heat pipe in the future heat system can produce some guiding significance...