Study on Comprehensive Utilization Status and Technical Route of FGD Gypsum from Coal-Fired Power Plants

Abstract:

The aim of this paper is to investigate FGD gypsum quality from coal-fired power plants and its comprehensive utilization. FGD gypsum comprehensive utilization technologies mainly include employed in the wallboard manufacture, as cement retarders, as a construction material for roads and as a soil ameliorant. In China, FGD gypsum is mainly utilized to produce wallboard and as cement retarders. FGD gypsum comprehensive utilization technical route was proposed based on FGD gypsum produce, storage, transport and comprehensive utilization. In order to ensure FGD gypsum quality so that it can be well utilized, the following requirements should be satisfied: for FGD gypsum, moisture content (wet basis) should be no more than 10%; CaSO₄·2H₂O content should be no less than 90%; CaSO₄·1/2H₂O content should be no more than 0.5%; pH should be controlled between 5 and 9; Cl^- content (dry basis) should be no more than 200 mg/kg.

• Periodical: Applied Mechanics and Materials (Volumes 675-677)
• Pages: 713-717
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.675-677.713
• Online since: October 2014
• Authors: Bin Jie Han, Tao Yue*, Peng Jing, Peng Lai Zuo, Chen Long Wang, Shu Fang Qi, Yong Hua Ding
• Keywords: Cement Retarder, Comprehensive Utilization, FGD Gypsum, Wallboard

References

[1] China Electricity Council, China Power Enterprise Development Annual Report 2013(In Chinese)[R]. China Market Press, 2013: 2, 103.

[2] Jan B. W Frandsen, Søren Kiil, Jan Erik Johnsson, Optimisation of a Wet FGD Pilot Plant Using Fine Limestone and Organic Acids[J]. Chemical Engineering Science, 2001. 56(10): 3275-3287.

DOI: 10.1016/s0009-2509(01)00010-0

[3] Directive 2001/80/EC of the European Parliament and of the Council of 23 October 2001 on the Limitation of Emissions of Certain Pollutants into the Air from Large Combustion Plants.

[4] Ruud Meij, B te Winkel, The Emissions and Environmental Impact of PM10 and Trace Elements from a Modern Coal-fired Power Plant Equipped with ESP and Wet FGD[J]. Fuel Processing Technology, 2004. 85( 6–7): 641-656.

DOI: 10.1016/j.fuproc.2003.11.012

[5] Soud HN. Developments in FGD. London: IEA Coal Research; (2000).

[6] E. Álvarez-Ayuso, A. Giménez, J.C. Ballesteros, Fluoride Accumulation by Plants Grown in Acid Soils Amended with Flue Gas Desulphurisation Gypsum[J]. Journal of Hazardous Materials, 2011. 192: 1659–1666.

DOI: 10.1016/j.jhazmat.2011.06.084

[7] G. Tzouvalas, G. Rantis, S. Tsimas, Alternative Calcium-sulfate-bearing Materials as Cement Retarders: Part II. FGD Gypsum[J]. Cement and Concrete Research, 2004. 34: 2119–2125.

DOI: 10.1016/j.cemconres.2004.03.021

[8] Ji-ning Wei, Tao Liu, Lin Zhu, et al., Research on Comprehensive Utilization of Limestone-gypsum Desulphurization Products and Its Countermeasure(In Chinese)[J]. Electric Power Environmental Protection, 2012. 28(3): 38-40.

[9] Zhao-jia Wang, Peng-xuan Duan, Ye Zhang, Utilization of FGD Gypsum(In Chinese)[J]. Beijing Building Materials Academy of Sciences Research, 115-121.

[10] Kawasaki Heavy Industries, Ltd., Status of FGD Gypsum Utilization in Japan and Prospects of FGD Gypsum Utilization in China(In Chinese)[J]. New Building Materials, 1999. 12: 37-40.

[11] Venta GJ．Utilization of chemical gypsum in Japan[J]. 2nd International Conference on FGD and Chemical Gypsum, 1991(5): 12-13.

[12] Zhao-jia Wang, Peng-xuan Duan, Ye Zhang, FGD Gypsum Utilization Technology Development Review(In Chinese)[J]. 2008 Third (China) International Building dry mortar production and application technology Symposium, 2008: 54-61.

[13] Lian-qing Yin, Zheng Xu, Jing Sun, The Influencing Factors of Desulfurized Gypsum Quality and Its Resourceful Application(In Chinese)[J]. Power Environmental Protection, 2008. 24(1): 28-30.