多并联、大通量水过滤器的自动反洗新方法

A New Automatic Backwashing Method for Water Filters with Multiparallel Connection and High Flux

本文涉及水处理过程所用的过滤器成组反洗自动控制技术.设定自动反洗四个条件:浓水量、分流水量、源水的污染指数和多并联过滤器的台数.通过控制器进行在线检测,及时获得上述数据.通过控制器内预先设定的软件数学模型进行处理,获得过滤器堵塞状况,发出反洗控制信号,开启反洗阀门,用浓水进行反洗.结束反洗后,控制器自动切换回到运行状态.本方法克服了传统方法(定时反洗压差反洗和定容反洗)的弊端,提供的检测手段简单、直观,不需要压力表,切换准确,且"反洗"切换次数减少,确保中间产品水水质指标稳定,延长设备寿命,节水、节电、系统运行稳定可靠.市售单片机等组成控制器,能自主灵活实现其软件数学模型.适用于水处理过程中多并联、大通量的过滤器自动反洗.

A new automatic backwashing method for water filters with multiparallel connection and high flux was proposed. First, four variables, i. e. concentrated water flux, shunt water flux, pollution index of source water and the number of multiparaUel filters, for automatic back wash were assumed and through the controller above mentioned data were obtained by on-line inspection. The through the treatment of software mathematic model the jamming condition of the filters was detected and a backwashing signal was given to open the back washing value and carry out back wash. Finally, back wash was ended and the controller automatically switched to run. The proposed detection method is simple and reliable, do not require manometer, switches precisely and decreases the switch number of back washing, assures the stability of intermediate product water quality, the life time of equipments and saves energy and water. The controller was consisted of a single chip Micyoco and a software mathematic model was built.