1785-L20E
1785-L20E
1785-L20E
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除氧器系統主要是控制水箱水位和水溫，監視除氧器壓力�？刂葡到y采用AI調節器、 變頻器、氣動薄膜調節閥等先進的控制設備,對除氧器施行有效的控制,系統具有自動/手動切換功能、聲光報警提示等確保系統的安全運行，采用變頻器對水泵進行起�？刂疲瑢崿F給水的自動調節。
1、控制回路：
除氧器溫度：用PT100測量水的溫度，通過溫度變化調節氣動薄膜調節閥的開度，改變蒸汽量的大小，使溫度保持在104度，調節器的型號為AI-808AX3L2L2。
2、系統調試
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福建光沃自動化設備有限公司
聯系人 ：歐工（銷售經理）
手機 ：18030229053
電話 ：0592-5709825
QQ ：2479261344
郵箱 ：2479261344@qq.com
傳真 ：0592-5917519
信用=財富 誠信=財富 共贏=財富
除氧器水位：采用單室平衡容器加差壓變送器的方法，可得到與水位成正比的4—20mA的電流信號，測量儀表將該電流信號轉換為水位信號，直接在儀表上顯示水位的高低。 該水位信號同時作為自動調節的水位測量信號，參與系統的自動調節，調節器的型號為AI-808AI4X3L2L2。
AI調節器是這個系統的核心控制設備，它的控制效果直接影響整個系統的正常運行。在沒有經驗控制參數的時候，為了達到最佳的控制效果，儀表要進行PID自整定，但一般的調節儀表在自整定時的調節狀態是位式控制，輸出量要么最大要么最小，在系統中調節輸出大幅變化是不允許的。AI-808調節器具有手動自整定模式可以很好的解決這個問題，具體操作是：把儀表切換到手動輸出狀態，通過儀表的△ ▽鍵調整輸出量，使測量值盡量和設定值保持一致，然后在這個狀態下啟動自整定，這樣儀表的輸出值將限制在當前手動輸出值的±10%范圍內，從而避免出現輸出值的大幅變化。在多數情況下，自整定一次就可以使獲得滿意的控制效果。如果控制有偏差時，可以通過微調M5、P、T參數來修正。水位控制的PID參數取CTRL=4、M5=4、P=5、T=1。溫度控制的PID參數最好是通過自整定來取得，除氧器壓力在0.012-0.02 MPa時，如果溫度還達不到104度，可以通過調節蒸汽旁路閥來加熱，使溫度達到104度。
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