本文選題：FCC沉降器 + Reynolds應(yīng)力輸運(yùn)模型(RSM)　； 參考：《石油學(xué)報(bào)(石油加工)》2017年06期

【摘要】：FCC沉降器內(nèi)兩級(jí)旋風(fēng)分離系統(tǒng)是石油工業(yè)催化裂化過(guò)程的重要組成部分。為了分析兩級(jí)旋風(fēng)分離系統(tǒng)之間的傳遞關(guān)系,筆者采用Reynolds應(yīng)力輸運(yùn)模型(RSM)對(duì)FCC沉降器內(nèi)兩級(jí)旋風(fēng)分離系統(tǒng)進(jìn)行兩相數(shù)值模擬,研究了4種不同結(jié)構(gòu)的流場(chǎng)分布特征及兩級(jí)分離器間流動(dòng)不穩(wěn)定性的相互影響過(guò)程。結(jié)果表明,粗旋和頂旋采用合理的結(jié)構(gòu)形式能更好地平衡頂旋氣流,提高分離效率,降低壓力降。料腿底部無(wú)約束時(shí),粗旋排出流率較大,頂旋排出流率較小,且各頂旋排出流率并不相同。由粗旋排氣管排出的氣流仍有旋轉(zhuǎn)特點(diǎn),使方形直連管下端有漩渦區(qū),出現(xiàn)了多個(gè)封閉循環(huán)流動(dòng)的小漩渦,這對(duì)頂旋的流動(dòng)不穩(wěn)定性有重要的影響。
[Abstract]:The two-stage cyclone separation system in the FCC settler is an important part of the catalytic cracking process in the petroleum industry.In order to analyze the transfer relationship between the two-stage cyclone separation system, the two-phase numerical simulation of the two-stage cyclone separation system in the FCC settler is carried out by using the Reynolds stress transport model.The flow field distribution characteristics of four different structures and the interaction process of flow instability between two stage separators are studied.The results show that the reasonable structure of rough rotation and top spin can balance the top spin flow, improve the separation efficiency and reduce the pressure drop.When the bottom of the feed leg is unconstrained, the rate of coarse swirl discharge is larger, the rate of top spin discharge is smaller, and the rate of top spin discharge is different.The flow from the rough exhaust pipe still has the characteristics of rotation, which makes the bottom end of the square straight pipe have a swirl region, and many small swirls of closed circulation flow appear, which has an important effect on the flow instability of the top spin.
【作者單位】： 中國(guó)石油大學(xué)重質(zhì)油國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：中國(guó)石油大學(xué)(北京)科研基金項(xiàng)目(2462015YQ0303)資助
【分類號(hào)】：TE96

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本文編號(hào)：1763328