Study on uniform flow technology of compact circular primary air duct at mediumspeed mill inlet

Abstract

Abstract:

To solve the inaccurate online measurement of primary air flow rate at a medium speed mill inlet in a 1000MW coal fired power plant, flow field test, uniform flow optimization and practical transformation are conducted.The research can be applied for uniform flow The technology of compact large-scale circular duct.The technology can improve the uniformity of velocity distribution at the measurement cross section and eliminate local vortex regions and back flow regions by flow split, diversion, rectification and uniform.The accurate measurement on the primary air flow rate is achieved and the its coefficient deviation can be kept below 3%. The automatic control valve is put into practice and works well and steady.The total current of the primary air fan decreases by 50A, the coal consumption rate reduces by 0.14g/(kW·h), and the annual fuel cost declines by 498000 Yuan.

Key words:

mill inlet, primary air, uniform flow, numerical simulation, reform validation

WAN Liming1，MEI Zhenfeng2，LI Debo3，SU Peng1，QIU Jiayu1.

Study on uniform flow technology of compact circular primary air duct at mediumspeed mill inlet

[J]. Huadian Technology, 2019, 41(6): 6-12.

[1]	TONG Jialin, ZHANG Yan, LIU Wensheng, MAO Jianbo, YE Xuemin. Numerical simulation on co-combustion and alkali metal distribution in an opposed firing boiler mixed with sludge [J]. Integrated Intelligent Energy, 2024, 46(8): 50-58.
[2]	SONG Jianjun, FU Kun, CHEN Meiqian. Simulation on the gas-solid flows and combustion in a multi-pass circulating fluidized bed based on computational particle fluid dynamics method [J]. Integrated Intelligent Energy, 2024, 46(8): 59-66.
[3]	ZHANG Lidong, LI Pei, JIANG Tieliu, LI Qinwei, ZHANG Lei, XU Feng, MENG Xin. Numerical simulation on the wind blocking and speed increasing effect of trough solar arrays [J]. Integrated Intelligent Energy, 2024, 46(6): 1-7.
[4]	SHANG Yongqiang, WANG Wenfeng, WANG Weishu, GUO Jiawei, ZHENG Haonan, GE Xuewen. Analysis on the thermal insulation of long-distance steam heating pipes [J]. Integrated Intelligent Energy, 2023, 45(4): 47-51.
[5]	YUAN Tianzhi, CHEN Ruiwen, Dilari YASHENG, XU Luoyun, HU Sideng. Research of parameter selection and accuracy optimization on event-driven simulation method of DC-DC converters [J]. Integrated Intelligent Energy, 2023, 45(3): 41-49.
[6]	GUO Guangzheng, GOU Yujun, ZHONG Xiaohui. Simulation study on the effect of flow channel's different cross-section on PV/T system performance [J]. Integrated Intelligent Energy, 2022, 44(4): 76-84.
[7]	WANG Ding, XIAO Hu, CHEN Yuxuan, YUE Song, ZHANG Yanping. Preheating analysis on molten salt storage tank based on CFD method [J]. Huadian Technology, 2021, 43(7): 75-81.
[8]	ZHAO Dazhou, WANG Mingxiang, RUAN Huifeng, GU Jing, WANG Mingxiao. Simulation and optimization for Urea-SCR system of the natural gas internal combustion engine in a distributed energy station [J]. Huadian Technology, 2021, 43(5): 45-52.
[9]	CHEN Bing, GUO Yongheng, LI Hongjiao, LIU Baiqian, ZHANG Ganyang, ZHAO Haibao. Configuration of electrode and plate in ESP and numerical simulation of particle migration in the electric field [J]. Huadian Technology, 2020, 42(9): 1-8.
[10]	BAI Hao, ZHANG Jian, GUO Xinwei, LIU Yicheng, MA Qianhui, ZHANG Zhongxiao. Numerical simulation for synergistic control on denitration in the pulverized coal boiler with air staging and flue gas circulation [J]. Huadian Technology, 2020, 42(9): 9-15.
[11]	LIN Yu. Numerical simulation of spraying effects and impacts on the desulphurization tower shell with two types of nozzles [J]. Huadian Technology, 2020, 42(9): 16-25.
[12]	ZHANG Hailong，YANG Guangrui，JING Xinjing，XING Leqiang，LIU Chao，DANG Lijun. Research on energysaving optimization for mediumspeed mill pulverizing systems [J]. Huadian Technology, 2020, 42(6): 25-30.
[13]	DING Yang，HAO Jiangang，XIE Daxing. Numerical analysis on 9E gas turbine DLN1.0 combustion system [J]. Huadian Technology, 2020, 42(5): 31-36.
[14]	ZHANG Fufeng1，LIU Daokuan2，QU Baozhong2，YU Ziyan1，WU Kai2，MA Shuangchen2. Status and progress of numerical simulation in flue gas evaporation technology for desulfurization wastewater #br# [J]. Huadian Technology, 2020, 42(3): 8-18.
[15]	YANG Zhen, WANG Xinyu, ZHU Xuan'er, HUANG Yaji, YUE Junfeng. Numerical simulation study on reducing high temperature corrosion in furnace by adjusting internal and external secondary air and taking closing-to-wall air [J]. Huadian Technology, 2020, 42(12): 28-36.

Study on uniform flow technology of compact circular primary air duct at mediumspeed mill inlet

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments