| FU Peng,LIU Luo-hang,YANG Wei-ping,LIU Ren-xin,ZHANG Kai.Study on Structure Optimization of Feed Conveying Pipeline in Gas-Solid Two-phase Flow[J],50(12):303-310, 319 |
| Study on Structure Optimization of Feed Conveying Pipeline in Gas-Solid Two-phase Flow |
| Received:January 20, 2021 Revised:October 13, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.12.029 |
| KeyWord:elbow structure optimization gas-solid two-phase flow numerical simulation DPM erosion wear |
| Author | Institution |
| FU Peng |
School of Engineering, Jiangxi Agricultural University, Nanchang , China |
| LIU Luo-hang |
School of Engineering, Jiangxi Agricultural University, Nanchang , China |
| YANG Wei-ping |
School of Engineering, Jiangxi Agricultural University, Nanchang , China |
| LIU Ren-xin |
School of Engineering, Jiangxi Agricultural University, Nanchang , China |
| ZHANG Kai |
Jiangxi Zengxin Technology Co.Ltd, Xinyu , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Focusing on the serious erosion wear of the inner wall surface of the elbow caused by the gas-solid two-phase flow in feed conveying pipeline, a new structure with auxiliary air flow on the outside of the elbow was proposed. Based on computational fluid dynamics, the erosion wear of ordinary and new type elbows was studied by adopting discrete phase model (DPM). The validity of the model was verified by the pressure drop gradient experiment of ordinary elbow. By analyzing the flow field distribution of these two kinds of elbows, the effect of air inlet velocity, particle mass flow rate and particle size on the erosion wear of these two kinds of elbows was further studied. The results show that with increasing of air inlet velocity, the average erosion wear rate of these two kinds of elbows firstly decreased and then increased. However, the average erosion wear rate of the new type elbow decreased by 7.1%~8.5% compared with that of the ordinary. Moreover, when the air inlet velocity was 35 m/s, the average erosion wear rate of these two kinds of elbows was the lowest. With increasing of particle mass flow rate, the average erosion wear rate of these two kinds of elbows basically increased linearly. But the growth rate of the average erosion wear rate of the new type elbow was slightly lower than that of the ordinary elbow, and the average erosion wear rate of the new type of elbow was 8.2%~9.7% lower than that of the ordinary. With increasing of particle size, the average erosion wear rate of these two kinds of elbows firstly increased sharply and then changed gently. But the average erosion wear rate of the new type of elbow decreased by 8.2%~17% compared with that of the ordinary. It is found that erosion worn on the outside of these two kinds of elbows, but the new structure can effectively reduce the erosion wear of the elbow. The particle mass flow has the greatest impact on the erosion and wear of the elbow, and the larger the particle mass flow, the greater the average erosion and wear rate. The particle size has the best effect on reducing the erosion and wear of the elbow, and the smaller the particle size, the better the effect. |
| Close |
|
|
|