# [1]杜敏,等.两段式气流床煤气化炉内熔渣壁面沉积数值模拟[J].东南大学学报(自然科学版),2014,44(2):307-313.[doi:10.3969/j.issn.1001-0505.2014.02.015] 　Du Min,Zhao Changsui,et al.Numerical simulation of slag deposition on internal wall in a two-stage entrained-flow coal gasifier[J].Journal of Southeast University (Natural Science Edition),2014,44(2):307-313.[doi:10.3969/j.issn.1001-0505.2014.02.015] 点击复制 两段式气流床煤气化炉内熔渣壁面沉积数值模拟() 分享到： var jiathis_config = { data_track_clickback: true };

44

2014年第2期

307-313

2014-03-20

## 文章信息/Info

Title:
Numerical simulation of slag deposition on internal wall in a two-stage entrained-flow coal gasifier

1东南大学能源与环境学院, 南京210096; 2江苏大学能源与动力工程学院, 镇江212013
Author(s):
1School of Energy and Environment, Southeast University, Nanjing 210096, China
2School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China

Keywords:

O359
DOI:
10.3969/j.issn.1001-0505.2014.02.015

Abstract:
The 3D numerical simulation is conducted to investigate the slag desposition on the internal wall in a two-stage dry feed entrained-flow coal gasifier developed in China. A model based on the Eulerian-Lagrangian approach for the turbulent flow with multiphase reactions in the gasifier is proposed after reasonable hypotheses. The Realizable k-ε model is used to simulate the complex turbulent gas flow while the stochastic trajectory model is adopted to track coal particle trajectories and the particle-deposition process. The flow field of the gas phase, the trajectories of coal particles, the concentration distribution of coal particles, and the slag deposition rate on the wall in the gasifier are obtained using the proposed model. The slag deposition characteristics on the gasifier wall in the entrained-flow coal gasifier are revealed, and the effects of the feeding mode on the slag deposition on the internal wall are numerically analyzed. The results indicate that the feeding mode with two opposed nozzles makes the majority of slag particles deposit on the wall areas between the injectors at the injector height. The feeding mode with four opposed nozzles makes the slag deposition rate on the wall of the first stage higher than that of the feeding mode with two opposed nozzles and makes the deposition distribution more uniform along the circumference, which is good for the formation of uniform slag layer to protect the wall. The feeding mode with four nozzles for tangential firing makes almost all the particles deposit on the wall with very short residence times.

## 参考文献/References:

[1] Kunze C, Spliethoff H. Modelling, comparison and operation experiences of entrained flow gasifier [J]. Energy Conversion and Management, 2011, 52(5): 2135-2141.
[2] Troiano M, Carbone R, Montagnaro F, et al. A lab-scale cold flow model reactor to investigate near-wall particle segregation relevant to entrained-flow slagging coal gasifiers [J]. Fuel, 2014, 117(30): 1267-1273.
[3] Wang J, Liu H F, Liang Q F, et al. Experimental and numerical study on slag deposition and growth at the slag tap hole region of shell gasifier [J]. Fuel Processing Technology, 2013, 106: 704-711.
[4] Liu S, Hao Y L. Particle deposition characteristics in entrained flow coal gasifier [J]. Thermal Science, 2012, 16(5): 1544-1548.
[5] Yu G S, Zhu Q R, Chi G Z, et al. Study on slag composition and flow property in a bench-scale OMB gasifier [J]. Fuel Processing Technology, 2012, 104: 136-143.
[6] 郝英立, 许忠林, 刘升. 多喷嘴对置式煤气化炉内气固两相流动及壁面沉积 [J]. 东南大学学报:自然科学版, 2008, 38(3): 461-467.
Hao Yingli, Xu Zhonglin, Liu Sheng. Gas-solid two-phase flows and particle deposition on internal wall in coal gasifier with multi opposed injectors [J]. Journal of Southeast University:Natural Science Edition, 2008, 38(3): 461-467.(in Chinese)
[7] 倪建军, 梁钦锋, 代正华, 等. 撞击流气化炉内气固两相流动与颗粒附壁沉积数值模拟 [J]. 中国电机工程学报, 2009, 29(2): 69-74.
Ni Jianjun, Liang Qinfeng, Dai Zhenghua, et al. Numerical simulation of gas-solid two phase flows and particle deposition in impinging streams gasifier [J]. Proceedings of the CSEE, 2009, 29(2): 69-74.(in Chinese)
[8] 郑建涛, 许世森, 任永强. 两段式干煤粉加压气化技术在煤制天然气中的应用 [J]. 洁净煤技术, 2012, 18(3): 48-52.
Zheng Jiantao, Xu Shisen, Ren Yongqiang. Application of two-stage dry pulverized coal pressurized gasification technology in SNG process [J]. Clean Coal Technology, 2012, 18(3): 48-52.(in Chinese)
[9] 陶文铨. 数值传热学 [M]. 2版. 西安: 西安交通大学出版社, 2001:370-376.
[10] Seggiani M. Modelling and simulation of time varying slag flow in a Prenflo entrained-flow gasifier [J]. Fuel, 1998, 77(14): 1611-1621.
[11] 任永强, 许世森, 夏军仓, 等. 神木煤粉加压气流床气化中试试验研究 [J]. 煤化工, 2006(5): 15-18.
Ren Yongqiang, Xu Shisen, Xia Juncang, et al. Pilot-plant research on pressurized entrained flow gasification of Shenmu coal [J]. Coal Chemical Industry, 2006(5): 15-18.(in Chinese)
[12] Gong Y, Guo Q H, Zhang J, et al. Impinging flame characteristics in an opposed multiburner gasifier [J]. Industrial & Engineering Chemistry Research, 2013, 52(8): 3007-3018.
[13] Shinada O, Yamada A, Koyama Y. The development of advanced energy technologies in Japan IGCC: a key technology for the 21st century [J]. Energy Conversion and Management, 2002, 43(9/10/11/12): 1221-1233.

## 相似文献/References:

[1]刘升,郝英立.Texaco气流床煤气化炉内气固两相流动的数值模拟[J].东南大学学报(自然科学版),2009,39(4):803.[doi:10.3969/j.issn.1001-0505.2009.04.030]
Liu Sheng,Hao Yingli.Numerical simulation of gas-solid two-phase flow in a Texaco entrained-flow coal gasifier[J].Journal of Southeast University (Natural Science Edition),2009,39(2):803.[doi:10.3969/j.issn.1001-0505.2009.04.030]
[2]郝英立,许忠林,刘升.多喷嘴对置式煤气化炉内气固两相流动及壁面沉积[J].东南大学学报(自然科学版),2008,38(3):461.[doi:10.3969/j.issn.1001-0505.2008.03.019]
Hao Yingli,Xu Zhonglin,Liu Sheng.Gas-solid two-phase flows and particle deposition on internal wall in coal gasifier with multi opposed injectors[J].Journal of Southeast University (Natural Science Edition),2008,38(2):461.[doi:10.3969/j.issn.1001-0505.2008.03.019]