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<div>　　<strong>磷酸鹽加藥裝置</strong>用于直接向鍋爐汽包內(nèi)加藥的裝置，使汽包系統(tǒng)工作在很好的狀態(tài)，延長熱力設(shè)備的使用壽命，保證熱水設(shè)備長期穩(wěn)定地安全運行。可以在手動和自動兩種模式下運行。自動模式下運行可以選配鍋爐取樣裝置、在線磷酸根儀、在線PH儀及帶觸摸屏PLC，可根據(jù)磷酸根含量或者PH值實現(xiàn)磷酸鹽溶液的自動投加。</div><div>　　一、工作原理</div><div>　　鍋爐給水中的鈣、鎂硬度會在高溫環(huán)境下發(fā)生化學(xué)反應(yīng)，或者濃縮結(jié)晶，生成不溶的水垢，牢固附著在鍋爐受熱面上，這種水垢是熱的不良導(dǎo)體，會阻礙熱傳導(dǎo)，嚴(yán)重時可能發(fā)生鍋爐爆管事故，另外，還會誘發(fā)并加劇垢下金屬化學(xué)腐蝕，危害相當(dāng)嚴(yán)重。雖然鍋爐凝結(jié)水、給水都經(jīng)過了嚴(yán)格的軟化、除鹽處理，但仍有少量鈣、鎂硬度進(jìn)入爐水，如果不對這部分硬度進(jìn)行處理，也會結(jié)垢對鍋爐安全運行造成威脅，目前，爐水加磷酸鹽是比較為適宜的處理方法，反應(yīng)如下：</div><div>　　10Ca2++6PO4+2OH---Ca10（OH）2（PO4）6（堿式磷酸鈣）</div><div>　　堿式磷酸鈣是一種松軟的水渣，易隨鍋爐排污排除，且不會粘附在鍋內(nèi)變成水垢。</div><div>　　二、工藝流程</div><div>　　磷酸鹽加藥裝置主要包含藥液溶配系統(tǒng)、計量投加系統(tǒng)、安全系統(tǒng)和控制系統(tǒng)四個部分。其中，藥液溶配系統(tǒng)包含：溶液箱、攪拌機、磁翻板液位計、排污閥及管路閥門；計量投加系統(tǒng)主要是計量泵、流量標(biāo)定柱；安全系統(tǒng)包含：安全閥、止回閥、脈沖阻尼器、Y型過濾器、針型閥、球閥、排污閥、壓力表；控制系統(tǒng)包含：在線磷酸根儀、在線PH儀、自動控制柜。使用過程中，將固體磷酸鹽加入溶藥箱內(nèi)，然后按比例加入除鹽水或凝結(jié)水?dāng)嚢枞芙?，由計量投加系統(tǒng)加到鍋爐汽包內(nèi)，投加控制可采用手動方式，也可依據(jù)上位系統(tǒng)輸出的控制信號，進(jìn)行隨動控制，自動投加。<br 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