煤粉粒径对HNCERI气化炉碳转化率与固/液渣层分布的影响

doi:10.16085/j.issn.1000-6613.2021-2053

化工进展 ›› 2022, Vol. 41 ›› Issue (3): 1517-1527.DOI: 10.16085/j.issn.1000-6613.2021-2053

• 减污降碳协同化工节能减排技术 • 上一篇下一篇

煤粉粒径对HNCERI气化炉碳转化率与固/液渣层分布的影响

许世森¹(), 王肖肖², 刘刚¹, 李小宇¹, 任永强¹, 谭厚章²()

^1.中国华能集团清洁能源技术研究院有限公司，煤基清洁能源国家重点实验室，北京 102209
^2.西安交通大学热流科学与工程教育部重点实验室，陕西西安 710049

收稿日期:2021-09-30 修回日期:2021-11-25 出版日期:2022-03-23 发布日期:2022-03-28
通讯作者: 谭厚章
作者简介:许世森（1965—），男，博士，教授级高级工程师，主要从事煤气化技术研究。E-mail：shs_xu@chng.com.cn。
基金资助:
国家重点研发计划(2017YFB0601900);华能集团科技项目(HNKJ20-H57)

Numerical simulation on the effect of coal size on slag distribution and carbon conversion efficiency of HNCERI gasifier

XU Shisen¹(), WANG Xiaoxiao², LIU Gang¹, LI Xiaoyu¹, REN Yongqiang¹, TAN Houzhang²()

^1.Huaneng Clean Energy Research Institute, State Key Laboratory of Coal Based Clean Energy, Beijing 102209, China
^2.MOE Key Laboratory of Thermo-Fluid Science and Engineering ( Xi’an Jiaotong University), Xi’an 710049, Shaanxi, China

Received:2021-09-30 Revised:2021-11-25 Online:2022-03-23 Published:2022-03-28
Contact: TAN Houzhang

摘要/Abstract

摘要：

以中国华能集团清洁能源技术研究院（Huaneng Clean Energy Research Institute，HNCERI）两段干粉加压气化炉为研究对象，采用考虑了焦炭颗粒表面气体组分扩散效应的随机孔模型计算焦炭气化反应速率以评估碳转化率。同时，耦合熔渣子模型计算气化炉一段壁面固液渣层分布特性和热损失，研究了煤粉粒径对HNCERI气化炉碳转化率和固液渣层分布特性的影响。结果表明所构建的模型可以准确预测气化炉出口主要气体组分组成、碳转化率和气化炉一段壁面热损失；气化炉一段碳转化率受固有气化速率和停留时间控制，二段主要受颗粒停留时间控制；因此，通过减小煤粉粒径可以减小气体在颗粒表面扩散阻力，有利于提高气化炉一段碳转化率，而适量增加煤粉粒径可以增加煤粉颗粒在气化炉二段的停留时间，有利于提高二段碳转化率。模拟结果显示煤粉颗粒粒径从20μm增加到200μm，一段碳转化率从99.68%降低到了95.06%，二段碳转化率从69.03%增加到了89%。煤粉粒径对气化炉上缩口和直段壁面液态渣层分布影响很小，但显著影响固态渣层厚度的发展。

关键词: 煤粉粒径, 熔渣模型, 碳转化率, 数值模拟

Abstract:

HNCERI (Huaneng Clean Energy Research Institute) two-stage dry powder pressurized gasifier was used was the research object. A random pore model that considers the effect of gas diffusion on the surface of char particle was used to calculate the char gasification reactions rate to evaluate carbon conversion efficiency. The slag sub-model was used to calculate the slag distribution characteristics and the wall heat loss of the first stage. The effect of coal size on carbon conversion efficiency and the slag distribution characteristics in HNCERI gasifier were studied. The results showed that the model can accurately predict the main gas components at the outlet of the gasifier, the carbon conversion efficiency and the wall heat loss. The carbon conversion efficiency of the first stage was mainly controlled by the intrinsic gasification reaction rate and the particle residence time, while the second stage carbon conversion efficiency was mainly controlled by particle residence time. Therefore, the decrease of coal size which significantly reduces the gas diffusion resistance on the surface of char particles was beneficial to increase carbon conversion efficiency of the first stage, while the appropriate increase of coal size which is conducive to increase the particle residence time was beneficial to increase the carbon conversion efficiency of the second stage. The simulation results showed that when the particle size increased from 20μm to 200μm, the first-stage carbon conversion efficiency decreased from 99.68% to 95.06%, while the second-stage carbon conversion rate increases from 69.03% to 89%. The coal size had little effect on the liquid slag distribution on the neck and straight wall of the gasifier, but had significantly effect on the development of solid slag layer.

Key words: coal size, slag model, carbon conversion efficiency, numerical simulation

中图分类号:

TQ54

许世森, 王肖肖, 刘刚, 李小宇, 任永强, 谭厚章. 煤粉粒径对HNCERI气化炉碳转化率与固/液渣层分布的影响[J]. 化工进展, 2022, 41(3): 1517-1527.

XU Shisen, WANG Xiaoxiao, LIU Gang, LI Xiaoyu, REN Yongqiang, TAN Houzhang. Numerical simulation on the effect of coal size on slag distribution and carbon conversion efficiency of HNCERI gasifier[J]. Chemical Industry and Engineering Progress, 2022, 41(3): 1517-1527.

图/表 2

参考文献 28

1	王辅臣, 于广锁, 龚欣, 等. 大型煤气化技术的研究与发展[J]. 化工进展, 2009, 28(2): 173-180.
	WANG Fuchen, YU Guangsuo, GONG Xin, et al. Research and development of large-scale coal gasification technology[J]. Chemical Industry and Engineering Progress, 2009, 28(2): 173-180.
2	刘霞, 田原宇, 乔英云. 国内外气流床煤气化技术发展概述[J]. 化工进展, 2010, 29(S2): 120-124.
	LIU Xia, TIAN Yuanyu, QIAO Yingyun. Progress of entrained-bed coal gasificaton technology[J]. Chemical Industry and Engineering Progress, 2010, 29(S2): 120-124.
3	柳康, 许世森, 李广宇, 等. 基于整体煤气化联合循环的燃烧前CO₂捕集工艺及系统分析[J]. 化工进展, 2018, 37(12): 4897-4907.
	LIU Kang, XU Shisen, LI Guangyu, et al. Technological process and system analysis of pre-combustion CO₂ capture based on IGCC[J]. Chemical Industry and Engineering Progress, 2018, 37(12): 4897-4907.
4	ZHANG B, REN Z Y, SHI S P, et al. Numerical analysis of gasification and emission characteristics of a two-stage entrained flow gasifier[J]. Chemical Engineering Science, 2016, 152: 227-238.
5	FERMOSO J, ARIAS B, PEVIDA C, et al. Kinetic models comparison for steam gasification of different nature fuel chars[J]. Journal of Thermal Analysis and Calorimetry, 2008, 91(3): 779-786.
6	XU J L, ZHAO H, DAI Z H, et al. Numerical simulation of opposed multi-burner gasifier under different coal loading ratio[J]. Fuel, 2016, 174: 97-106.
7	KIM Y T, SEO D K, HWANG J. Study of the effect of coal type and particle size on char-CO₂ gasification via gas analysis[J]. Energy & Fuels, 2011, 25(11): 5044-5054.
8	黄庠永, 刘加勋, 姜秀民. O₂/CO₂气氛中超细煤粉着火特性[J]. 中国电机工程学报, 2010, 30(11): 50-55.
	HUANG Xiangyong, LIU Jiaxun, JIANG Xiumin. Investigation on ignition characteristics of micro-pulverized coal in O₂/CO₂ mixture[J]. Proceedings of the CSEE, 2010, 30(11): 50-55.
26	WU Yuxin, ZHANG Jiansheng, YUE Guangxi, et al. Analysis of dominating process between mixing and reactions in a texaco coal gasifier[J]. Journal of Combustion Science and Technology, 2009, 15(4): 287-292.
27	WU Y X, SMITH P J, ZHANG J S, et al. Effects of turbulent mixing and controlling mechanisms in an entrained flow coal gasifier[J]. Energy & Fuels, 2010, 24(2): 1170-1175.
9	刘忠, 阎维平, 高正阳, 等. 超细煤粉的细度对再燃还原NO的影响[J]. 中国电机工程学报, 2003, 23(10): 204-208
	LIU Zhong, YAN Weiping, GAO Zhengyang, et al. The effect of the micro-pulverized coal fineness on nitric oxide reduction by reburning[J]. Proceedings of the CSEE, 2003, 23(10): 204-208
10	金晶, 张忠孝, 李瑞阳. 超细煤粉再燃的模拟计算与试验研究[J]. 中国电机工程学报, 2004, 24(10): 215-218.
	JIN Jing, ZHANG Zhongxiao, LI Ruiyang. Numerical simulation and experimental study on micronized coal reburning[J]. Proceedings of the CSEE, 2004, 24(10): 215-218.
11	金晶. 超细煤粉分级燃烧NO_x还原过程的研究[D]. 上海: 上海理工大学, 2005.
	JIN Jing. The study on superfine pulverized coal reburning for NO _x reduction[D]. Shanghai: University of Shanghai for Science & Technology, 2005.
12	YE I, RYU C, KOO J H. Influence of critical viscosity and its temperature on the slag behavior on the wall of an entrained coal gasifier[J]. Applied Thermal Engineering, 2015, 87: 175-184.
13	YE I, RYU C. Numerical modeling of slag flow and heat transfer on the wall of an entrained coal gasifier[J]. Fuel, 2015, 150: 64-74.
14	JEONG H J, SEO D K, HWANG J. CFD modeling for coal size effect on coal gasification in a two-stage commercial entrained-bed gasifier with an improved char gasification model[J]. Applied Energy, 2014, 123: 29-36.
15	FAN Q, LIU Y H, LI G Y, et al. Effect of coal particle size on gasification performance of two-stage entrained-flow coal gasifier[J]. The Canadian Journal of Chemical Engineering, 2021, 99(12): 2677-2690.
16	XU S S, REN Y Q, WANG B M, et al. Development of a novel 2-stage entrained flow coal dry powder gasifier[J]. Applied Energy, 2014, 113: 318-323.
17	LI G Y, WANG L P, WANG C W, et al. Experimental study on coal gasification in a full-scale two-stage entrained-flow gasifier[J]. Energies, 2020, 13(18): 4937.
18	SEGGIANI M. Modelling and simulation of time varying slag flow in a Prenflo entrained-flow gasifier[J]. Fuel, 1998, 77(14): 1611-1621.
19	KAJITANI S, HARA S, MATSUDA H. Gasification rate analysis of coal char with a pressurized drop tube furnace[J]. Fuel, 2002, 81(5): 539-546.
20	REN Y Q, XU S S, LI G Y. Experimental study on the operational performance of an advanced two-stage entrained-flow coal gasifier[J]. Energy & Fuels, 2014, 28(8): 4911-4917.
21	樊强, 刘银河, 李广宇, 等. 载气对两段式干煤粉加压气化炉气化特性的影响[J]. 化工进展, 2017, 36(1): 136-145.
	FAN Qiang, LIU Yinhe, LI Guangyu, et al. Effect of carrier gas on gasification performance of two-stage entrained-flow coal gasifier[J]. Chemical Industry and Engineering Progress, 2017, 36(1): 136-145.
22	WEN C Y, CHAUNG T Z. Entrainment coal gasification modeling[J]. Industrial & Engineering Chemistry Process Design and Development, 1979, 18(4): 684-695.
23	ZHANG B B, SHEN Z J, LIANG Q F, et al. Numerical study of dynamic response analysis of slag behaviors in an entrained flow gasifier[J]. Fuel, 2018, 234: 1071-1080.
24	XU J L, LIANG Q F, DAI Z H, et al. The influence of swirling flows on pulverized coal gasifiers using the comprehensive gasification model[J]. Fuel Processing Technology, 2018, 172: 142-154.
25	张宾宾. 气流床气化炉内壁面熔渣流动与传热过程研究[D]. 上海: 华东理工大学, 2018.
	ZHANG Binbin. Modeling study of slag flow and heat transfer process on the wall for an entrained-flow gasifer[D]. Shanghai: East China University of Science and Technology, 2018.
26	吴玉新, 张建胜, 岳光溪, 等. Texaco气化炉混合过程及化学反应过程中的控制因素分析[J]. 燃烧科学与技术, 2009, 15(4): 287-292.
28	CHUI E H, HUGHES P M J, RAITHBY G D. Implementation of the finite volume method for calculating radiative transfer in a pulverized fuel flame[J]. Combustion Science and Technology, 1993, 92(4/5/6): 225-242.

[1]	王太, 苏硕, 李晟瑞, 马小龙, 刘春涛. 交流电场中贴壁气泡的动力学行为[J]. 化工进展, 2023, 42(S1): 133-141.
[2]	陈匡胤, 李蕊兰, 童杨, 沈建华. 质子交换膜燃料电池气体扩散层结构与设计研究进展[J]. 化工进展, 2023, 42(S1): 246-259.
[3]	郭强, 赵文凯, 肖永厚. 增强流体扰动强化变压吸附甲硫醚/氮气分离的数值模拟[J]. 化工进展, 2023, 42(S1): 64-72.
[4]	邵博识, 谭宏博. 锯齿波纹板对挥发性有机物低温脱除过程强化模拟分析[J]. 化工进展, 2023, 42(S1): 84-93.
[5]	赵曦, 马浩然, 李平, 黄爱玲. 错位碰撞型微混合器混合性能的模拟分析与优化设计[J]. 化工进展, 2023, 42(9): 4559-4572.
[6]	刘炫麟, 王驿凯, 戴苏洲, 殷勇高. 热泵中氨基甲酸铵分解反应特性及反应器结构优化[J]. 化工进展, 2023, 42(9): 4522-4530.
[7]	叶振东, 刘涵, 吕静, 张亚宁, 刘洪芝. 基于钙镁二元盐的热化学储能反应器的性能优化[J]. 化工进展, 2023, 42(8): 4307-4314.
[8]	俞俊楠, 俞建峰, 程洋, 齐一搏, 化春键, 蒋毅. 基于深度学习的变宽度浓度梯度芯片性能预测[J]. 化工进展, 2023, 42(7): 3383-3393.
[9]	单雪影, 张濛, 张家傅, 李玲玉, 宋艳, 李锦春. 阻燃型环氧树脂的燃烧数值模拟[J]. 化工进展, 2023, 42(7): 3413-3419.
[10]	王硕, 张亚新, 朱博韬. 基于灰色预测模型的水煤浆输送管道冲蚀磨损寿命预测[J]. 化工进展, 2023, 42(7): 3431-3442.
[11]	周龙大, 赵立新, 徐保蕊, 张爽, 刘琳. 电场-旋流耦合强化多相介质分离研究进展[J]. 化工进展, 2023, 42(7): 3443-3456.
[12]	卢兴福, 戴波, 杨世亮. 转鼓内圆柱形颗粒混合的超二次曲面离散单元法模拟[J]. 化工进展, 2023, 42(5): 2252-2261.
[13]	张晨宇, 王宁, 徐洪涛, 罗祝清. 纳米颗粒强化传热的多级潜热储热器性能评价[J]. 化工进展, 2023, 42(5): 2332-2342.
[14]	马润梅, 杨海超, 李正大, 李双喜, 赵祥, 章国庆. 表面强化镀层对高速轴承腔密封端面变形及摩擦磨损影响分析[J]. 化工进展, 2023, 42(4): 1688-1697.
[15]	张成松, 张静, 龚斌, 李明洋, 袁佳新, 李宏业. 自吸射流柔性搅拌桨振动特性[J]. 化工进展, 2023, 42(4): 1728-1738.

煤粉粒径对HNCERI气化炉碳转化率与固/液渣层分布的影响

Numerical simulation on the effect of coal size on slag distribution and carbon conversion efficiency of HNCERI gasifier

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 2

参考文献 28

相关文章 15

编辑推荐

Metrics

本文评价