自转塑料螺旋齿管自动清洗及传热强化技术

针对数量最多的低流速传热设备的污垢问题 ,研究了具有自动清洗和传热强化双重功能的塑料螺旋齿管自动清洗新技术 ,运用质点系动量矩原理对其结构设计原则进行了理论分析 ,并且设计了三种不同结构的螺旋齿管。试验研究结果为 :内管直径较大为好 ,螺旋角常存在一个最小值。与自转清洗的塑料螺旋扭带相比 :2 0 60型螺旋齿管的自动清洗力矩增大 141% ,传热系数平均提高 5 0 %左右 ,流体阻力仍在工程应用的一般范围内。因此 ,该技术可以用于 0 2 5m/s以上的低流速传热设备的自动清洗防垢和传热强化 ,具有很高的推广应用价值

The Self-cleaning and Heat Transfer Enhancement Technology of Self- rotating Palstic Spiral Sticks

The new technology of self-rotating plastic spiral stick is researched to self-cleaning and heat transfer enhancement reliably in view of the fouling problem of low flow rate heat exchangers whose number is the largest.The structure design principle is analyzed theoretically by using the momentum moment principle of particle system.Experiments were conducted and researched for three kinds of spiral stick of different structure.The results show that the spiral stick of larger inner diameter is better and there is a minimum for spiral angle.The spin moment is increased by 114% and the heat transfer coefficient is enhanced by 50% over those of plastic twisted strip.The flowing resistance is not large and in the fange of engineering application.This technolagy can be used for self-cleaning fouling and heat transfer enhancement of heat exchangers which flow rate is more that 0.25m/s.