
140CPU65160
140CPU65160
140CPU65160
140CPU65160
加煤机下料系统采用双通道液压阀下料,分为左右上阀和左右下阀,加煤时可以采用手动及自动方式进行。自动方式时由海为PLC进行程序控制,由煤气出口温控表进行控制启动加煤,也可由加煤机操作箱面板上的手动启动加煤旋钮进行启动加煤。并可在后台触摸屏监示到各个阀门的动作状态及加煤次数,加煤次数可在触摸屏上进行手动复位。手动方式时:将控制方式切换到手动控制,然后利用面板上的上(下)阀打开或关闭按钮对上下阀进行打开或关闭,手动控制时上下阀不受程序及时间约束,由操作员根据需要进行控制(注:手动时各通道上下阀也同时互锁,不能同时打开上下阀)。自动方式时:将控制方式切换到自动控制,当PLC接收到由温控表加煤指令(或面板上的手动加煤指令)时,温控表的加煤指令是由上段出口温度表进行控制,加煤启动温度为温控表内的第一段报警AL1值确定(具体设置参见温控表说明书),当前温度达到AL1的设置值时,AL1指示灯亮,并给加煤PLC发出加煤指令。PLC按照下阀打开→→下阀关闭→→上阀打开→→上阀关闭的顺序轮流进行加煤,根据需要可以调整下阀打开时间及上阀打开时间,并通过调整加煤计数器的下煤次数来控制加煤量的大小。根据工艺条件要求,需要再次加煤时,再按“加煤启动”按钮或等待下次加煤指令的到来,加煤机再次自动循环工作。最终加煤完成时须确保灰斗内储存有煤粉,有利于阀门的密封。
GENERAL ELECTRIC DS3800NGRA1L1D USPP DS3800NGRA1L1D
专业销售:进口DCS控制系统备品备件和大型进口系统模块备件公司
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