Numerical comparison of feasibility of injecting waste tire pyrolytic gas into blast furnace

被引：0
作者：
Guo T. [1 ]
Chu M. [2 ]
Liu Z. [3 ]
Huang W. [1 ]
Zhao S. [1 ]
机构：
[1] College of Materials Science and Engineering, Hebei University of Engineering, Handan
[2] State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang
[3] School of Metallurgy, Northeastern University, Shenyang
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2022年 / 53卷 / 12期
基金：
中国国家自然科学基金;
关键词：
blast furnace; coke oven gas; feasibility; hydrogen; natural gas; numerical comparison; raceway; waste tire pyrolytic gas;
D O I：
10.11817/j.issn.1672-7207.2022.12.025
中图分类号：
学科分类号：
摘要：
To study the feasibility of injecting waste tire pyrolytic gas(WTPG) into blast furnace, firstly, based on the mass and enthalpy balances theory, a raceway mathematical model of injecting reducing gas into blast furnace through tuyere was established. Secondly, the impacts of injection rates of four kinds of reducing gases such as WTPG, natural gas, coke oven gas and hydrogen on raceway adiabatic flame temperature(RAFT), the amount and composition of bosh gas, the mass flow rate of coke and the shape of raceway were systematically compared by raceway model. Finally, the compensation measures for improving the thermal regime and optimizing the shape of the raceway were put forward. The results show that the RAFT decreases and the volume of raceway increases after the injection of reducing gas, which requires thermal compensation by enhancing blast temperature or increasing oxygen enrichment and shape compensation by adjusting tuyere diameter or blast pressure. After thermal compensation, the blast rate decreases, and the volume fractions of H2 and total reductive gas in bosh gas all increase, in which the injection cases with the maximum and the minimum variations are WTPG and hydrogen, respectively. After blast temperature compensation, the flow rate of coke decreases, while the volume of the raceway shows different changes. After oxygen enrichment compensation, the volume of raceway decreases, while the flow rate of coke increases except for the injection of WTPG. After shape compensation, when the ratio of raceway area to hearth area decreases, the tuyere diameter or the blast pressure decreases. For every 1 m3/s increase in WTPG injection rate, the blast temperature needs to increase by 135.14 ℃, or the oxygen enrichment rate needs to increase by 3.18%. Correspondingly, for above two thermal compensation measures of the blast temperature and oxygen enrichment rate, the blast rates decrease by 124.98 m3/min and 199.58 m3/min, respectively, the volume fractions of hydrogen in bosh gas increase by 2.66% and 2.65%, respectively, and the mass flow rates of coke decrease by 1.71 kg/s and 0.16 kg/s, respectively. Overall, the WTPG has obvious advantages in blast furnace injection. © 2022 Central South University of Technology. All rights reserved.
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页码：4855 / 4865
页数：10
相关论文
共 27 条
  • [1] JIANG Zhihui, LIU Yang, SONG Yongmeng, Et al., Review of pyrolysis for waste tires and research prospects of pyrolysis products, Chemical Industry and Engineering Progress, 40, 1, (2021)
  • [2] TORRETTA V, RADA E C, RAGAZZI M, Et al., Treatment and disposal of tyres: two EU approaches. A review[J], Waste Management, 45, (2015)
  • [3] Guiding opinions on accelerating the establishment and improvement of the green and low−carbon circular development economic system
  • [4] SIENKIEWICZ M, KUCINSKA−LIPKA J, JANIK H, Et al., Progress in used tyres management in the European Union: a review, Waste Management, 32, 10, (2012)
  • [5] CZAJCZYNSKA D, KRZYZYNSKA R, JOUHARA H, Et al., Use of pyrolytic gas from waste tire as a fuel: a review, Energy, 134, (2017)
  • [6] MARTINEZ J D, PUY N, MURILLO R, Et al., Waste tyre pyrolysis-A review[J], Renewable and Sustainable Energy Reviews, 23, (2013)
  • [7] LOMBARDI L, CARNEVALE E, CORTI A., A review of technologies and performances of thermal treatment systems for energy recovery from waste[J], Waste Management, 37, (2015)
  • [8] POLICELLA M, WANG Zhiwei, BURRA K G, Et al., Characteristics of syngas from pyrolysis and CO<sub>2</sub>−assisted gasification of waste tires, Applied Energy, 254, (2019)
  • [9] YANG Chao, JIAO Qingze, FENG Caihong, Et al., Research progress on catalytic cracking of waste tires, Chemical Industry and Engineering Progress, 41, 7, pp. 3877-3889, (2022)
  • [10] RAZZAQ R, Chunshan LI, ZHANG Suojiang, Coke oven gas: availability, properties, purification, and utilization in China[J], Fuel, 113, (2013)
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