MICROMIXER IMPROVEMENT AND VERIFICATION FOR AN SCR DENITRATION SYSTEM OF A 330 MW COAL-FIRED POWER UNIT BASED ON CFD

FENG Lizhong; CONG Riqiang; LIU Yi; QI Yanfang

doi:10.13205/j.hjgc.202210021

Volume 40 Issue 10

Oct. 2022

Turn off MathJax

Article Contents

Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(10): 156-161

FENG Lizhong, CONG Riqiang, LIU Yi, QI Yanfang. MICROMIXER IMPROVEMENT AND VERIFICATION FOR AN SCR DENITRATION SYSTEM OF A 330 MW COAL-FIRED POWER UNIT BASED ON CFD[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 156-161. doi: 10.13205/j.hjgc.202210021

Citation:

FENG Lizhong, CONG Riqiang, LIU Yi, QI Yanfang. MICROMIXER IMPROVEMENT AND VERIFICATION FOR AN SCR DENITRATION SYSTEM OF A 330 MW COAL-FIRED POWER UNIT BASED ON CFD[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 156-161. doi: 10.13205/j.hjgc.202210021

Citation:

PDF( 7900 KB)

MICROMIXER IMPROVEMENT AND VERIFICATION FOR AN SCR DENITRATION SYSTEM OF A 330 MW COAL-FIRED POWER UNIT BASED ON CFD

doi: 10.13205/j.hjgc.202210021

1. Hebei Cleaner Production Technology Service Center, Shijiazhuang 072550, China;
2. Shenyang Shanshuiyuan Environmental Tech Co., Ltd, Shenyang 110013, China;
3. Central Research Institute of Building & Construction, Beijing 100088, China;
4. Hebei Bide Environmental Tech Co., Ltd, Shijiazhuang 050090, China

Received Date: 2021-01-28

Abstract

Abstract

In this paper, the flow velocity, temperature, ammonia concentration, and flow direction of flue gas in the SCR denitration system of a 330 MW coal-fired power unit were simulated by three-dimensional numerical simulation, and then the numerical simulation results were verified by a physical model. The results showed that the trapezoidal micromixer had the advantages of simple processing, large disturbance range, large pressure loss, and great influence on the downstream velocity field; the twisted vane micromixer had lower resistance and effect on the downstream velocity field, but smaller disturbance range and higher requirements on the installation angle. The comprehensive performance of hexagonal micromixer was between trapezoidal micromixer and twisted vane micromixer. The hexagonal micromixer could better realize the mixing of NH₃ and flue gas, and the uniformity of downstream velocity field and NH₃ concentration met the design requirements.
- SCR,
- flow field improvement,
- CFD numerical simulation,
- micromixer

FullText(HTML)

References(14)

References

[1]	王瑜. SCR法烟气脱硝系统在660 MW火电机组中的应用[D]. 北京:华北电力大学(北京), 2013.
[2]	沈丹, 李大梅, 杨蕾,等. 电厂SCR脱硝数值模拟技术研究进展[J]. 能源环境保护, 2013, 27(3):10-13.
[3]	苑广存. 500 MW机组脱硝系统喷氨格栅优化设计[J]. 锅炉技术,2019,50(6):8-12.
[4]	雷鉴琦. 超低排放SCR烟气脱硝系统的优化分析[J]. 锅炉技术,2019,50(2):76-80.
[5]	周国民,付鹏,王富强,等. 燃煤电站锅炉脱硝精准喷氨技术研究及应用[J]. 锅炉技术,2020,51(6):73-79.
[6]	郭婷婷, 刘汉强, 杨勇平,等. 基于数值模拟的1000 MW燃煤机组SCR脱硝系统设计[J]. 电站系统工程, 2010, 26(5):61-64.
[7]	高飞,邹红果. 烟气流场分布对SCR系统的影响及其优化措施[J]. 环境工程, 2019,37(10):153-156.
[8]	杨超, 张杰群, 郭婷婷. SCR烟气脱硝装置烟气流场数值模拟[J]. 东北电力大学学报, 2012, 32(1):66-70.
[9]	YIM S D, KIM S J, BAIK J H, et al. Decomposition of urea into NH₃ for the SCR process[J]. Industrial & Engineering Chemistry Research, 2004, 43(16):4856-4863.
[10]	朱天宇, 李德波, 方庆艳,等. 燃煤锅炉SCR烟气脱硝系统流场优化的数值模拟[J]. 动力工程学报, 2015, 35(6):481-488.
[11]	BAXTER L L. Turbulent transport of particles[D]. Brigham Young University, Provo, Utah.1989.
[12]	JAIN S. Three-dimensional simulation of turbulent particle dispersion[D]. University of Utah, Utah, 1995.
[13]	BRUCATO A, GRISAFI F, MONTANTE G. Particle drag coefficients in turbulent fluids[J]. Chemical Engineering Science, 1998, 53(18):3295-3314.
[14]	LAUNDER B E, SPALDING D B. The numerical computation of turbulent flows[J]. Computer Methods in Applied Mechanics & Engineering, 1974, 3(2):269-289.