1756-OB16E
1756-OB16E
变频改造主回路
广西信发铝电公司电厂3#、4#炉排粉风机采用4套JD-BP37-630F(630kW/6kV)高压变频调速系统进行调速控制。4台排粉风机改造主回路相同,以3#炉排粉风机为例系统改造主回路如图2所示。
图23#炉排粉风机旁路柜原理图
原来2台锅炉4台排粉风机全部采用工频运行,对4台排粉风机增设变频调速装置,采用一拖一加自动旁路的方式。将原排粉风机入口挡板调节的运行方式改为由变频调节风机风量的运行方式。当变频器故障或检修,可选择自动或手动方式切换至工频运行。当排粉风机变频运行时在DCS界面上调节风机频率去调整风机转速,从而达到调节风机风量的目的。
1756-OB16E
厦门光沃自动化设备有限公司
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