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The electric ball valve controls the hydrophobic action of the expanding vessel
The author: Time:2019/8/29

電動(dòng)球閥控制連排擴(kuò)容器疏水作用
將連排疏水改用電動(dòng)球閥控制,當(dāng)連排水位升高到規(guī)定高度時(shí)打開電動(dòng)球閥排水,可盡量延長(zhǎng)連排水在擴(kuò)容器的存留時(shí)間,使它充分的氣化,減少排污時(shí)的熱量和潔凈水損失。
(1)連排疏水管處連接電動(dòng)球閥,其公稱直徑和設(shè)計(jì)直徑一致,以保證通流量和關(guān)閉時(shí)的嚴(yán)密性。
(2)DCS控制邏輯修改為擴(kuò)容器內(nèi)水位升到600 mm時(shí)自動(dòng)打開球閥,水位下降到100 mm時(shí)關(guān)閉電動(dòng)球閥。
(3)將連排擴(kuò)容器的壓力作為監(jiān)控點(diǎn),當(dāng)壓力升高到設(shè)定值時(shí),關(guān)閉鍋爐連排電動(dòng)閥,開啟連排擴(kuò)容器排污電動(dòng)球閥。
將連排疏水改用電動(dòng)球閥控制后,污水在擴(kuò)容器內(nèi)停留時(shí)間得到延長(zhǎng),可有效地回收熱能,提高了鍋爐連排的投入率,鍋爐補(bǔ)水率由2.3%下降到1.7%,鍋爐水質(zhì)合格率也大大提高。

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