Research On Spiral Finned Tubes In Application Of The Low Temperature Reheater Of 670t/h Coal-fired Boiler

In this paper, analysis and research have been carried out to deal with a lot of problems such as too low temperature for the reheating stream, too high temperature for the flue gas emitting from the furnace and too serious fly ash abrasion for the low temperature reheater of 670t/h coal-fired boiler in power plant.Low temperature reheater's operational characteristics have been analyzed herein and the causes for problems listed above have also been further understood. Design of the spiral finned tube low temperature reheater has been made by means of applicable investigation of spiral finned tubes, some mathematical-physical models for computing spiral finned tubes wall temperature have been set up. Based on this model, wall temperature of spiral finned tubes has been computed to verify the validity of the model put forward in the paper.The paper in this paper makes numerical computation based on operation conditions, which allows operation staff to really reduce accidences judging by the radical rule and then improve economic and safety in boiler's operation, to get a good idea of the temperature varying regulation of spiral finned tubes as well.Sun Peng (power plant Thermal power engineering) Directed by prof. Sun Baomin...