IC693MDL340
IC693MDL340
IC693MDL340
由于輸油泵機組容量偏大，其流量和儲油罐液位控制均采用人為節(jié)流調節(jié)控制等因素，造成了該生產工藝系統(tǒng)運行效率不高、設備易損件故障頻繁和“大馬拉小車”等現象的發(fā)生，這不僅嚴重浪費了能源，而且影響油井的正常生產和原油產量的完成。為此我們于2005年初提出了在30kW的CSY11-2油氣混輸單螺桿泵上推廣應用了森蘭SB70G變頻器進行調速控制，安裝了質量可靠的變頻調速設備，以解決生產中的諸多實際問題，見到了良好的現場使用效果，取得了顯著的經濟效益和社會效益。
二、控制方案
新灘油田162油氣混輸站和191油氣混輸站油氣混輸泵機組的變頻調速技術控制方案采用了閉環(huán)控制或開環(huán)控制方式，閉環(huán)控制與開環(huán)控制方式分別如圖1﹑圖2所示，以滿足現場生產工作的需要。
2.1現場生產工藝流程
162站管理著7口油井，油井來油先進入2.7米高的40方儲油罐，經加熱后由30kW的CSY11-2油氣混輸單螺桿泵將油井產出物輸送至幾十公里外的油氣接轉站。191站生產工藝流程與162站基本相同，目前管理著5口油井，油氣輸送距離比162站更遠。
2.2閉環(huán)控制應用技術方案
在40方儲油罐上安裝帶4～20mA模擬信號輸出的浮球液位計，將液位信號給變頻器，變頻器在接收液位計信號后與變頻器設定值比較，采用PID調節(jié)控制算法，通過變頻器輸出頻率的變化來自動調節(jié)和控制儲油罐的液位高度，達到節(jié)能降耗和油井生產平穩(wěn)運行自動控制的目的。儲油罐的液位控制高度為1.6米。
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