《Reliance 0-54349-2》

Reliance 0-54349-2

Reliance 0-54349-2 应用特点：

【厦门光沃自动化设备有限公司】
【联 系 人：陈小姐】
【免费热线：0592-5709825】
【24小时开机：18030229053 】     
【工作QQ: 2479261344】

反冲洗控制 
    一组滤池的反冲洗由一台公用的PLC来控制。当过滤达到过滤周期或滤池压差（水头）设定值时，滤池提出反冲洗请求，PLC根据滤池的优先秩序，组成一个请求反冲洗队列。一旦响应某格滤池的请求，PLC实施反冲洗的整个过程，在一组滤板中，不允许两个滤池同时进行反冲洗，当一只滤池正在反冲洗时，其它滤池请求反冲洗的信号则存入公用的PLC中，然后再按存储秩序，对滤池依次进行反冲洗。当滤池反冲洗时，公用PLC的控制过程是：①关闭待滤水进水阀，当滤池水位下降到 
洗砂排水槽顶时，关闭滤后水控制阀，打开反冲洗排水阀；②启动鼓风机，5秒钟后，打开滤池反冲洗气阀，对滤池进行1分钟气预冲；③打开反冲洗水阀，启动反冲洗水泵，进行7分钟的气水同时反冲洗；④关闭反冲洗气阀，5秒钟后，停鼓风机，打开空气隔膜阀排气，进行5分钟清水反冲漂洗后，停反冲水泵。5秒钟后，关闭水反冲洗阀，然后关闭反冲洗排水阀，打开待滤水进水阀，滤池恢复过滤。整个反冲洗过程历时约25分钟。另外，PLC还能控制滤池的开启个数，它根据滤池进水流量确定滤池的开启个数，按先停先开，先开先停的原则确定某格滤池的开、停。 

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