EXPERIMENTAL DESIGN TO ANALYZE AND OPTIMIZE THE DECHLORINATION PROCESS OF COAL ASH A SHAANXI COAL-FIRED POWER PLANT
DOI:
https://doi.org/10.14456/lsej.2024.39Keywords:
coal-fired power plant, waste residual, chlorine, calcinationAbstract
Coal is the main structure of China's energy resources. At the same time, coal power generation is the main power supply base in China. Coal contains chlorides, which harm the environment, while building materials are discharged or reused. Therefore, it is necessary to remove chlorine from the waste residue of coal-fired power plants. Moreover, conventional chemical testing methods are limited to detecting representative points and need to provide information about other points. However, results can be obtained for all operational parameters by employing a full factorial design analysis through Design of Experiments (DOE). In this study, a full factorial design of the experimental methods is used to detect the chlorine in the coal-fired coal ash of Shaanxi's coal-fired power plant. The chlorine in the coal-fired power plant ash is removed by calcination.
The influence of calcination time and calcination temperature on the chlorine removal rate is studied to find the best method to remove chlorine in industrial production.
The results show that calcination has the effect of removing chloride content in the slag of coal-fired power plants, and the two variables of calcination time and calcination temperature are directly proportional to the dechlorination rate. High temperature and long time can increase the removal rate of chloride in the slag of coal-fired power plants.
According to the removal effect, the best process can be obtained: calcination temperature is 1400°C, calcination time is 2 hours, the removal rate of chlorine is 99.51%, and the residual chloride in the sample is removed. At the same time, achieve full parameter range operation and optimize the dechlorination process accordingly.
References
China Coal Industry Association. Annual report on coal industry development in 2022. Beijing: China Coal Industry Association; 2023.
Rafieizonooz M, Khankhaje E, Rezania S. Assessment of environmental and chemical properties of coal ashes including fly ash and bottom ash, and coal ash concrete. Journal of Building Engineering 2022;49:104040.
Ustaoglu A, Yaras A, Sutcu M, Gencel O. Investigation of the residential building having novel environment-friendly construction materials with enhanced energy performance in diverse climate regions: cost-efficient, low-energy and low-carbon emission. Journal of Building Engineering 2021;43:102617.
Kumar P, Singh N. Influence of recycled concrete aggregates and Coal Bottom Ash on various properties of high volume fly ash-self compacting concrete. Journal of Building Engineering 2020;32:101491.
Lei R, Fu DS, Li GF. Research progress of fly ash comprehensive utilization. Clean Coal Technology 2013; 19(3):106-109.
Wang N, Sun X, Zhao Q, Yang Y, Wang P. Leachability and adverse effects of coal fly ash: a review. Journal of Hazardous Materials 2020;396:122725.
Kamal NLM, Beddu S, Syamsir A, Mohammad D, Itam Z, Hamid ZAA, Manan TSA. Immobilization of heavy metals for building materials in the construction industry – an overview. Materials Today Proceedings 2019;17:787-791.
Rafieizonooz M, Mirza J, Salim MR, Hussin MW, Khankhaje E. Investigation of coal bottom ash and fly ash in concrete as replacement for sand and cement. Construction and Building Materials 2016; 116:15-24.
Chawla M. Chapter 9 - Chlorine: Risk assessment, environmental, and health hazard. In J. Singh, R.D. Kaushik, & M. Chawla (Eds.), Hazardous Gases Academic Press. ISBN 9780323898577; 2021; 97-114.
Polder RB. Electrochemical chloride removal from concrete prisms containing chloride penetrated from sea water. Construction and Building Materials 1996;10(1):83-88.
Yan YD, Jin WL, Wang HL. Chloride ingression in cracked concrete under saturated state. Journal of Zhejiang University: Engineering Science 2011;45(12):2127-2133.
Durakovic B. Design of experiments application, concepts, examples: State of the art. Periodicals of Engineering and Natural Sciences 2017;5(3):421-439.
Öztürk N, Kavak D. Boron removal from aqueous solutions by batch adsorption onto cerium oxide using full factorial design. Desalination 2008;223(1–3):106-112.
Ridzuan N, Al-Mahfadi M. Evaluation on the effects of wax inhibitor and optimization of operating parameters for wax deposition in Malaysian crude oil. Petrol Sci Technol 2017;35(20):1945-1950.
Elarbe B, Elganidi L, Ridzuan N, Yusoh K, Abdullah N, Vijaya Kumar S. Application of full factorial design to screen the factors influencing the wax deposition of Malaysian crude oil. Journal of Petroleum Exploration and Production Technology 2022;12(7):1829-1839.
Ridzuan N, Azhar A, Subramanie P. Evaluation on the factors influencing the deposition of wax using full factorial design. IOP Conference Series: Materials Science and Engineering 2020;736(2):22-23.
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