本文選題：中空纖維蒸發(fā)器　切入點(diǎn)：傳熱　出處：《化工學(xué)報(bào)》2017年02期

【摘要】：蒸發(fā)器廣泛應(yīng)用于化工、食品等行業(yè),傳統(tǒng)的金屬管蒸發(fā)器由于其耐酸堿腐蝕性差、表面易結(jié)垢等弱點(diǎn),一定程度上限制了其應(yīng)用范圍,而具有優(yōu)良性能的高分子中空纖維管可有效解決這些問(wèn)題,具有很好的應(yīng)用前景。采用自制的高分子改性中空纖維管,制備出非金屬換熱器,并進(jìn)行了蒸發(fā)傳熱實(shí)驗(yàn)。結(jié)果表明,高分子中空纖維蒸發(fā)器的性能與料液溫度有密切關(guān)系,沸騰進(jìn)料時(shí)蒸發(fā)器的傳熱系數(shù)、產(chǎn)水量和熱量利用率均高于低溫進(jìn)料;傳熱熱阻主要集中在管外蒸汽加熱側(cè)和管壁的導(dǎo)熱性能,當(dāng)沸騰進(jìn)料時(shí)管壁熱阻占總傳熱熱阻的66%以上,而管內(nèi)蒸發(fā)側(cè)傳熱熱阻所占比重較低,均低于15.3%,且隨著料液流速的增大而降低到5%以下;隨著料液溫度的降低,蒸發(fā)過(guò)程的傳熱系數(shù)、能量利用效率以及產(chǎn)水量均顯著下降。
[Abstract]:Evaporators are widely used in chemical, food and other industries. The traditional metal tube evaporators are limited to some extent because of their weak points such as poor corrosion resistance to acid and alkali, easy scaling on the surface, etc. The macromolecule hollow fiber tube with excellent properties can solve these problems effectively and has a good application prospect. The non-metal heat exchanger is prepared by using the self-made polymer modified hollow fiber tube. The results show that the performance of the polymer hollow fiber evaporator is closely related to the feed temperature. The heat transfer coefficient, water production and heat utilization ratio of the evaporator in boiling feed are higher than those in low temperature feed. The heat transfer resistance is mainly concentrated on the heat conductivity of the outside steam heating side and the tube wall. The heat resistance of the tube wall accounts for more than 66% of the total heat transfer resistance when the boiling feed is fed, but the proportion of the heat transfer heat resistance in the evaporation side of the tube is relatively low. With the increase of feed flow rate, the heat transfer coefficient, energy use efficiency and water yield of evaporation process decreased significantly with the decrease of feed temperature.
【作者單位】： 化學(xué)工程聯(lián)合國(guó)家重點(diǎn)實(shí)驗(yàn)室;天津大學(xué)化工學(xué)院;天津化學(xué)化工協(xié)同創(chuàng)新中心;天津市膜科學(xué)與海水淡化重點(diǎn)實(shí)驗(yàn)室;
【基金】：天津市科技支撐計(jì)劃項(xiàng)目(12ZCZDSF02200)~~
【分類(lèi)號(hào)】：TQ051.62

【參考文獻(xiàn)】

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1 吳極;王瑾;王哲e，

本文編號(hào)：1666555