Using cantilever evaporative condenser: in the process of starting and stopping, due to the pressure difference and temperature difference in the condenser snake tube, the copper tube produces telescopic super-straight effect, because the copper material and scale expansion coefficient are very different, so the cantilever evaporative condenser has the function of automatic scaling. In the process of operation, the two-phase conversion of refrigerant in the condenser generates high-frequency vibration, so it is difficult to form a scale core, resulting in scale cannot adhere to the pipe wall. The pre-film anti-scaling treatment can effectively prevent the fouling crystals from adhering on the surface of the copper tube. A small number of continuous drainage devices are used to control the concentration ratio of calcium ions in the cooling circulating water within a certain range to effectively prevent the precipitation of scale; The precooler is set so that the surface evaporation temperature of the condenser tube is below 50 degree , and the large amount of water and intensive water distributor are used to ensure that the surface of the condenser tube is always covered by water film and there is no dry point. When the surface temperature of the heat exchange coil is lower than 50 degree C, the generated scale is loose and easy to wash, and when the surface temperature is higher than 50 degree C, the generated scale is hard and difficult to remove. (5) Set the water baffle so that there is no water attached to the condensing pipe at a higher temperature, which can effectively prevent condenser scaling