【摘要】：從汽水系統(tǒng)腐蝕產(chǎn)物遷徙過(guò)程入手,探討了超臨界機(jī)組汽水系統(tǒng)腐蝕產(chǎn)物的來(lái)源,即低壓加熱器和高壓加熱器等部件發(fā)生流動(dòng)加速腐蝕產(chǎn)生大量腐蝕產(chǎn)物,進(jìn)入工質(zhì)隨工質(zhì)進(jìn)行遷徙。由于工質(zhì)物性參數(shù)的變化,腐蝕產(chǎn)物溶解度降低,大量腐蝕產(chǎn)物沉積在高溫管道。研究發(fā)現(xiàn),爐管氧化皮的生成一方面來(lái)源于自身高溫氧化,另一方面來(lái)自腐蝕產(chǎn)物沉積。結(jié)果表明,汽水系統(tǒng)不同部件內(nèi)腐蝕形式不同,可以通過(guò)提高給水品質(zhì)來(lái)抑制腐蝕產(chǎn)物遷徙對(duì)機(jī)組的影響,保證機(jī)組安全穩(wěn)定運(yùn)行。
[Abstract]:Starting from the migration process of corrosion products in steam and water system, the source of corrosion products in steam and water system of Supercritical Unit is discussed, that is, the flow accelerated corrosion of low pressure heaters and high pressure heaters produces a large number of corrosion products, and the working fluid moves with the working fluid. Due to the change of physical parameters of working fluid, the solubility of corrosion products decreases, and a large number of corrosion products are deposited in high temperature pipes. It is found that the formation of furnace tube oxide scale comes from its own high temperature oxidation on the one hand and corrosion product deposition on the other. The results show that the corrosion forms in different components of the steam-water system are different, and the influence of corrosion product migration on the unit can be suppressed by improving the quality of feed water, so as to ensure the safe and stable operation of the unit.
【作者單位】： 華北電力大學(xué)電站設(shè)備狀態(tài)監(jiān)測(cè)與控制教育部重點(diǎn)實(shí)驗(yàn)室;寧夏電力公司電力科學(xué)研究院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51471069) 北京市自然科學(xué)基金項(xiàng)目(2152029) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金項(xiàng)目(2015ZD005)資助
【分類(lèi)號(hào)】：TG172
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本文編號(hào)：2504198