为节约用水和防止水源热污染,循环用水已作为一项有效的措施而得到广泛应用。近年来,国内许多城市都采用中、小型机械通风式冷却塔进行水的循环冷却,取得了一定成效;然而,由于这些冷却塔必须以风机通风冷却,加之有的冷却塔制造厂自制的风机质量欠佳,因此在实际运行中冷却效果并不理想并且风机的噪声大,常达90分贝以上。此外这些塔的风机电机长期在水雾中运转,常发生电机损坏事故。 In order to save water and prevent water-source heat pollution, recycled water has been widely used as an effective measure. In recent years, many cities in China have used medium and small mechanical ventilation cooling towers for water circulation cooling and achieved certain results; however, these cooling towers must be ventilated and cooled by fans, in addition to the quality of fans manufactured by some cooling tower manufacturers. It is not good, so in the actual operation, the cooling effect is not ideal and the noise of the fan is large, often reaching more than 90 decibels. In addition, the fan motors of these towers are operated in water fog for a long time, and motor damage accidents often occur.