Inorganic Chemicals Industry >

2023 , Vol. 55 >Issue 6: 85 - 91

DOI: https://doi.org/10.19964/j.issn.1006-4990.2022-0546

Environment·Health·Safety

Feasibility analysis of calcination and decomposition process of phosphogypsum in circulating fluidized bed

  • ZHANG Lei ,
  • LI Meng ,
  • XIANG Wenguo ,
  • HU Jun ,
  • CHEN Shiyi ,
  • DUAN Lunbo
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  • 1. SINOPEC Nanjing Engineering & Construction Incorporation，Nanjing 210049，China
    2. College of Chemical and Biological Engineering，Zhejiang University，Hangzhou 310058，China
    3. School of Energy and Environment，Southeast University，Nanjing 210096，China
    4. School of Petroleum and Natural Gas Engineering，School of Energy，Changzhou University，Changzhou 213164，China

Received date: 2022-09-09

  Online published: 2023-06-14

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Abstract

Phosphogypsum produced from phosphoric acid production，as industrial solid wastes，can be used for the production of sulfuric acid and calcium based materials，which is a sustainable technological route.The process of phosphogypsum decomposition in the coal-fired circulating fluidized bed to produce sulfuric acid and calcium-based materials after granulation was presented.The feasibility of the process was verified from the aspects of the mass energy balance of the process and the decomposition desulfurization performance of phosphogypsum calcined from coal under different working conditions.Thermodynamic calculation results showed that the process could realize self heating operation.CaO was generated from the decomposition and desulfurization of calcined phosphogypsum.O2/H2O and O2/CO2 were suitable fluidization and oxidation media.The volume fraction of SO2 in the dry gas at the reactor outlet could reach 33%，which was suitable for sulfuric acid production.The excessive reducing weak oxidizing atmosphere could realize the decomposition and desulfurization of phosphogypsum at 1 100 ℃，which was lower than the existing decomposition process temperature of phosphogypsum.Under the reaction conditions of 1 100 ℃，phosphogypsum/coal mass ratio of 4∶1，O2/CO2 or O2/H2O with 1% O2 volume fraction，the main components of solid residue were CaO，CaO·CaSiO3.The research results preliminarily showed that the technology of phosphogypsum calcination and decomposition by circulating fluidized bed to produce sulfuric acid and calcium based materials was feasible.

Key words： phosphogypsum; calcium-based materials; decomposition and desulphurization; circulating fluidized bed

Cite this article

ZHANG Lei , LI Meng , XIANG Wenguo , HU Jun , CHEN Shiyi , DUAN Lunbo . Feasibility analysis of calcination and decomposition process of phosphogypsum in circulating fluidized bed[J]. Inorganic Chemicals Industry, 2023 , 55(6) : 85 -91 . DOI: 10.19964/j.issn.1006-4990.2022-0546

References

1 华经产业研究院.2021-2026年中国脱硫石膏市场竞争格局及投资战略规划报告［R/OL］.（2020-12）［2022-06-10］.https://www.huaon.com/down/673012.
2 崔荣政，白海丹，高永峰，等.磷石膏综合利用现状及“十四五”发展趋势［J］.无机盐工业，2022，54（4）：1-4.
  CUI Rongzheng， BAI Haidan， GAO Yongfeng，et al.Current situation of comprehensive utilization of phosphogypsum and its development trend of 14th Five-Year Plan［J］.Inorganic Chemicals Industry，2022，54（4）：1-4.
3 董泽，翟延波，任志威，等.磷石膏建材资源化利用研究进展［J］.无机盐工业，2022，54（4）：5-9.
  DONG Ze， ZHAI Yanbo， REN Zhiwei，et al.Research progress on phosphogypsum utilization in building materials［J］.Inorganic Chemicals Industry，2022，54（4）：5-9.
4 李纯，薛鹏丽，张文静，等.我国磷石膏处置现状及绿色发展对策［J］.化工环保，2021，41（1）：102-106.
  LI Chun， XUE Pengli， ZHANG Wenjing，et al.Disposal status of phosphogypsum in China and countermeasures for green development［J］.Environmental Protection of Chemical Industry，2021，41（1）：102-106.
5 马小玲，谭宏斌，侯雄，等.磷石膏生产硫酸联产水泥研究现状及发展趋势［J］.新型建筑材料，2021，48（3）：71-76.
  MA Xiaoling， TAN Hongbin， HOU Xiong，et al.Research status and development trend of sulphuric acid co-production cement from phosphogypsum［J］.New Building Materials，2021，48（3）：71-76.
6 高强.山东鲁北企业集团总公司磷石膏制硫酸联产水泥技术进展［J］.磷肥与复肥，2019，34（7）：41-44.
  GAO Qiang.Research progress on production of sulfuric acid integrated with cement from phosphogypsum in Shandong Lubei Enterprise Group General Company［J］.Phosphate & Compound Fertilizer，2019，34（7）：41-44.
7 胡慧，陈婕妤.磷石膏资源化利用动态及其评述［J］.化工时刊，2019，33（8）：37-41.
  HU Hui， CHEN Jieyu.Trend of phosphogypsum resource utilization and its review［J］.Chemical Industry Times，2019，33（8）：37-41.
8 刘述祖.水泥悬浮预热与窑外分解技术［M］.武汉：武汉工业大学出版社，1995.
9 张伟.循环流化床中磷石膏还原分解实验研究及数值模拟［D］.昆明：昆明理工大学，2009.
  ZHANG Wei.Experimental study and numerical simulation on reduction and decomposition of phosphogypsum in circulating fluidized bed［D］.Kunming：Kunming University of Science and Technology，2009.
10 田玉龙，杨秀山，孔行健，等.磷石膏颗粒湍动流化特性实验及模拟［J］.过程工程学报，2022，22（9）：1224-1231.
  TIAN Yulong， YANG Xiushan，KONG（Hang|Xing）（Jian），et al.Experiment and simulation of turbulent fluidization characteristics of phosphogypsum particles［J］.The Chinese Journal of Process Engineering，2022，22（9）：1224-1231.
11 王荣谋，马丽萍，郑大龙，等.磷石膏流化分解过程颗粒的黏附特性［J］.硅酸盐通报，2017，36（3）：791-796.
  WANG Rongmou， MA Liping， ZHENG Dalong，et al.Adhesion characteristics of particles in fluidized decomposition process of phosphogypsum［J］.Bulletin of the Chinese Ceramic Society，2017，36（3）：791-796.
12 XIA Xiao， ZHANG Liqiang， LI Zhanyao，et al.Recovery of CaO from CaSO4 via CO reduction decomposition under different atmospheres［J］.Journal of Environmental Management，2022，301：113855.
13 GUO Qingjie， ZHANG Jianshe， TIAN Hongjing.Recent advances in CaSO4 oxygen carrier for chemical-looping combustion（CLC） process［J］.Chemical Engineering Communications，2012，199（11）：1463-1491.
14 应国量.磷石膏分解特性及其流态化分解制硫酸联产石灰的工艺研究［D］.武汉：武汉理工大学，2011.
  YING Guoliang.Study on decomposition characteristics of phosphogypsum and its fluidized decomposition process to produce sulfuric acid and lime［D］.Wuhan：Wuhan University of Technology，2011.
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