【IC693CMM302】

廈門(mén)莫格電氣自動(dòng)化有限公司
作為自動(dòng)化、控制和過(guò)程解決方案等領(lǐng)域的企業(yè)之一，AB，GE，英維思，福克斯波羅等歐美的產(chǎn)品

已得到數(shù)萬(wàn)家工廠(chǎng)的采用，其中包括世界大型的煉油廠(chǎng)、燃?xì)鈴S(chǎng)、石化廠(chǎng)、發(fā)電廠(chǎng)、紙漿和造紙廠(chǎng)，以及小型的綜合性批量制造工廠(chǎng)，

產(chǎn)品廣泛應(yīng)用于數(shù)控機(jī)械 冶金、石油天然氣、石油化工、化工、造紙印刷、紡織印染、機(jī)械、電子制造、汽車(chē)制造、煙草、塑膠機(jī)械、電力、水利、水處理/環(huán)保、市政工程、鍋爐供暖、能源、輸配電等行業(yè)

看到本條信息直接，好價(jià)格。

控制系統(tǒng)零部件解決方案

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地 址：廈門(mén)市思明區(qū)檳榔西里197號(hào)第四層B19單元

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控制系統(tǒng)先容【2】

    除氧器系統(tǒng)主要是控制水箱水位和水溫，除氧器壓力。控制系統(tǒng)采用AI調(diào)節(jié)器、 變頻器、氣動(dòng)薄膜調(diào)節(jié)閥等*的控制設(shè)備,對(duì)除氧器施行有效的控制,系統(tǒng)具有自動(dòng)/手動(dòng)切換功能、聲光報(bào)警提示等確保系統(tǒng)的安全運(yùn)行，采用變頻器對(duì)水泵進(jìn)行起停控制，實(shí)現(xiàn)給水的自動(dòng)調(diào)節(jié)。

    1、控制回路：

    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(hào)，丈量?jī)x表將該電流信號(hào)轉(zhuǎn)換為水位信號(hào)，直接在儀表上顯示水位的高低。 該水位信號(hào)同時(shí)作為自動(dòng)調(diào)節(jié)的水位丈量信號(hào)，參與系統(tǒng)的自動(dòng)調(diào)節(jié)，調(diào)節(jié)器的型號(hào)為AI-808AI4X3L2L2。

             除氧器溫度：用PT100丈量水的溫度，通過(guò)溫度變化調(diào)節(jié)氣動(dòng)薄膜調(diào)節(jié)閥的開(kāi)度，改變蒸汽量的大小，使溫度保持在104度，調(diào)節(jié)器的型號(hào)為AI-808AX3L2L2。

             2、系統(tǒng)調(diào)試
 
    AI調(diào)節(jié)器是這個(gè)系統(tǒng)的核心控制設(shè)備，它的控制效果直接影響整個(gè)系統(tǒng)的正常運(yùn)行。在沒(méi)有經(jīng)驗(yàn)控制參數(shù)的時(shí)候，為了達(dá)到的控制效果，儀表要進(jìn)行PID自整定，但一般的調(diào)節(jié)儀表在自整定時(shí)的調(diào)節(jié)狀態(tài)是位式控制，輸出量要么zui大要么zui小，在系統(tǒng)中調(diào)節(jié)輸出大幅變化是不答應(yīng)的。AI-808調(diào)節(jié)用具有手動(dòng)自整定模式可以很好的解決這個(gè)題目，具體操縱是：把儀表切換得手動(dòng)輸出狀態(tài)，通過(guò)儀表的△ ▽鍵調(diào)整輸出量，使丈量值盡量和設(shè)定值保持*，然后在這個(gè)狀態(tài)下啟動(dòng)自整定，這樣儀表的輸出值將限制在當(dāng)前手動(dòng)輸出值的±10%范圍內(nèi)，從而避免出現(xiàn)輸出值的大幅變化。在多數(shù)情況下，自整定一次就可以使獲得滿(mǎn)足的控制效果。假如控制有偏差時(shí)，可以通過(guò)微調(diào)M5、P、T參數(shù)來(lái)修正。水位控制的PID參數(shù)取CTRL=4、M5=4、P=5、T=1。溫度控制的PID參數(shù)是通過(guò)自整定來(lái)取得，除氧器壓力在0.012-0.02 MPa時(shí)，假如溫度還達(dá)不到104度，可以通過(guò)調(diào)節(jié)蒸汽旁路閥來(lái)加熱，使溫度達(dá)到104度。

四、結(jié)語(yǔ)
 
    本系統(tǒng)在石獅冠宏團(tuán)體鍋爐車(chē)間已運(yùn)行兩年，經(jīng)實(shí)踐證實(shí)能夠穩(wěn)定的控制除氧器，有效往除鍋爐給水中的氧氣及其它氣體,保證給水的品質(zhì)。
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