针对管道结垢引起的设备腐蚀问题,在分析现有防垢除垢方法的基础上提出了一种由可变频方波信号控制的电磁防垢除垢电路解决方案。系统由AVR单片机产生方波信号,利用光耦合器实现单片机同驱动电路的隔离,微弱电信号经后续电路放大,驱动管道外围线圈产生变化的电磁场。在电磁场作用下,污垢离子脱离管道内壁。实验结果表明,该装置可产生占空比为50%,频率从0 Hz~6 MHz连续变频输出的方波信号,驱动功率为72 W,具有防垢除垢效率高、使用范围广、易安装、功耗低等优点。

A kind of circuit based on square wave is designed to solve the problem of equipment corrosion caused by fouling in the pipeline. The square wave with variable frequencies is generated by AVR micro controller unit. After being processed through the driving circuit, the electricity signal driving the coil produces a magnetic field. Under the effect of electromagnetic, dirt ion is removed from the pipe wall. Experimental results demonstrate the square wave with the frequency conversion from 0 Hz to 6 MHz. The duty ratio is fifty percent and the driving power is 72 W. The equipment has high efficiency and wide applications and is easy to installation. Besides, the power consumption is low.