Problems and countermeasures of solid heat storage electric boiler circulating fans running at low speed

 Aiming at the damage of electric heating wire of a 240 kW solid heat storage electric boiler occurred in operation, carries out a cold state velocity measurement experiment, and evaluates the uniformity of the air distribution in the boiler by the CU value that reflecting the uniformity of the heat exchanger ducts, excluding the damage possibility of electric heating wire due to non-uniform air distribution. Carries out a two-dimensional numerical simulation of boiler equalizing chamber and heat exchange duct, obtains the cause of damage of the electric heating wire, analyses the problems of low speed operation of circulating fan in solid heat storage electric boiler, and determines the safety value of circulating fan operating frequency.