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反滲透(RO)</strong><strong>系統(tǒng)</strong>作為完整的化學(xué)物理系統(tǒng)，存在*的內(nèi)在規(guī)律，系統(tǒng)參數(shù)之間的相互關(guān)系表現(xiàn)為一組數(shù)學(xué)方程式，構(gòu)成實(shí)現(xiàn)優(yōu)化控制的約束條件。反滲透系統(tǒng)作為自動控制研究對象，集中了多變量、多目標(biāo)、非線性、時變性和不確定性等多種復(fù)雜因素于一體，在某些限定條件（如濃差極化指標(biāo)大值、難溶鹽飽和度大值、單支膜給水大值、單支膜濃水流量小值等）約束下進(jìn)行優(yōu)化設(shè)；一旦反滲透裝置的結(jié)構(gòu)已經(jīng)定型，就需要應(yīng)用測控技術(shù)和設(shè)備實(shí)現(xiàn)產(chǎn)水量、回收率高，耗水量、運(yùn)行費(fèi)用低的優(yōu)化控制日標(biāo)。</span></p><p><span style="font-size:14px"> 然而，從目前定型生產(chǎn)和裝備的大型<strong>反滲透工程</strong>或小機(jī)組的控制，很少見實(shí)現(xiàn)優(yōu)化控制的先例，而多半是實(shí)現(xiàn)電氣化控制，包括程序控制、主要設(shè)備<span style="font-family:times new roman">(</span>高壓泵<span style="font-family:times new roman">)</span>安全聯(lián)鎖保護(hù)<span style="font-family:times new roman">(</span>高低壓開關(guān)<span style="font-family:times new roman">)</span>、儲罐<span style="font-family:times new roman">(</span>槽<span style="font-family:times new roman">)</span>液位高低限開關(guān)等、基本的水質(zhì)檢測儀表有：<strong>在線式電導(dǎo)率儀</strong>、<strong>在線式<span style="font-family:times new roman">pH</span>計</strong>以及<strong>流量計</strong>等儀表，輸出<span style="font-family:times new roman">4 ~ 20mA</span>由數(shù)據(jù)采集單元采集并送往顯示單元顯示；只有投加<strong>阻垢劑</strong>、<span style="font-family:times new roman">PAC</span>、次氧酸鈉等藥劑的<strong>計量泵</strong>，被要求按照原水流量自動投加的系統(tǒng)，屬于工藝過程自動化的范疇，縱使有稱為反滲透智能控制的系統(tǒng)，也只是在硬件配置或組態(tài)技巧、人機(jī)界面等方面有所創(chuàng)新，而很少涉及工藝過程實(shí)現(xiàn)優(yōu)化控制的核心技術(shù)。換言之，目前用于對反滲透的自控系統(tǒng)，尚處于電氣化控制的范疇。</span></p> </div> <div id="wck0uwi" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/szhcy-Article-1989816/">pH值測量的基本原理</a></li> <li>下一篇：<a href="/szhcy-Article-1988480/">氨氮與硝酸鹽氮控制的概述</a></li> </ul> </div> </div>   <div id="mwa0a0g" class="foot_box"> <div id="oucc0go" class="foot_t"> <div id="uks0aga" class="w1200"> <a href="/">網(wǎng)站首頁</a>　|　<a href="/aboutus.html">關(guān)于我們</a>　|　<a href="/products.html">產(chǎn)品中心</a>　|　<a 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