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HESG330086R64 HE693116-307

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高压变频调速节能技术在油田输油泵机组上的应用 

摘要：输油泵是油库生产运行中主要能耗设备。由于泵的特性和管路特性不匹配，在实际运行中需要根据运行工况控制输油泵出口阀门的开度来调节流量，以满足生产工艺的需要。这种流量调节方式在输油泵出口阀门前后产生较大的泵管压差，大量的能源消耗在泵出口阀前后，造成能源的浪费。在南一油库6KV/630KW的KDY750-75×4型输油泵机组上推广应用了一套利德华福公司生产的高压变频调速系统，实现了通过改变输油泵的转速进行不同的工况调节，泵管压差而产生的节流损失，降低了输油单耗，节约了电能，改善了工艺。  

一、问题的提出 

　　大庆油田南一油库主要接收油田两大主力采油厂——采油一厂、采油二厂来油，总储量50×104m3，装备有5台输油泵机组。

　  由于输油泵和输油管道的特性不匹配（在泵选型过程，不可能选择到完全与管路特性匹配的输油泵），在不同的实际运行工况下，需通过调节输油泵出口阀门来调节流量，据统计5台输油泵在单泵、双泵、三泵并联运行，三种不同运行状况下，输油泵阀门出口大开度不超过10%（超过10%开度时易造成成输油泵电机超过额定电流而导致电机超负荷运行）。造成在输油泵出口阀门的前后存在着较大的泵管压差，泵出口阀门节流损失了大量的能源，输油泵做了大量的无用功，缩短了输油泵机组的维护周期和使用寿命，不同运行工况下输油泵出口阀门前后泵管压差统计情况

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