Development and Research on Dust Suppression Performance of a New Type of Spray Dust Suppressant for Increasing Moisturizing and Accelerating Coagulation in Mines
NIE Wen1,2,*, XU Changwei1,2, PENG Huitian1,2, ZHANG Shaobo1,2
1 School of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China 2 Laboratory of Mine Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, Shandong, China
Abstract: In view of the serious dust pollution of fully mechanized mining and the poor effect of spraying water on the wetting and capturing of coal dust, the large molecular weight of traditional spray dust reducing agents, the viscosity of the solution is not easy to atomize and the unsatisfactory dust reduction effect, etc., in order to improve the comprehensive mining face spray dust removal efficiency, reduce the dust concentration in the work area, under low temperature conditions, by introducing polydopamine into the acrylamide polymerization reaction system to control the degree of polymerization, generate a highly efficient atomized dust-reducing agent molecule PDA-PAM, and use infrared spectroscopy to study its functional group structure. The product is compounded with surfactants and hygroscopic inorganic salts. Orthogonal experiments are designed with the contact angle of the solution to the coal sample and the sedimentation speed of coal dust in the solution as evaluation indicators. The formula of the dust depressant solution 0.8%PDA-PAM, 0.05% dodecyl dimethyl benzyl ammonium chloride and 0.05%NaCl is finally determined. Based on CFD numerical simulation technology, under the disturbance of 1.3 m/s wind flow in Bailu Coal Mine 4307 fully mechanized mining face, the atomization of spray dust reducer solution at 1—8 MPa was simulated, revealing the influence law of spray dust reducer on spray atomization characteristics. Numerical simulation results show that there is a power function relationship between the average particle size of the droplets and the spray pressure; compared with the clean water spray, the average droplet size of the fog field produced by adding the compound spray dust suppressant is smaller and the distribution is more uniform; when the spray pressure is 8 MPa, the ratio of the droplet size of the fog field generated by spraying the dust-reducing agent solution in the optimal size range of 20—100 μm reaches 90.31%. It is verified by experiments of moisturizing and accelerating coagulation that the spray dust reducer solution developed can quickly wet coal dust and condense into shells, and can achieve the dual dust control effect of moisturizing and accelerating coagulation. The dust reducer is applied on site. Through actual measurement, the average total dust and respiratory dust concentration at each measuring point of the working face have been reduced to 72 mg/m3 and 44 mg/m3, the average total dust reduction rate has reached 84.2%, and the average respiratory dust reduction rate has reached 82.7%. The developed spray dust reducer solution can efficiently atomize to produce a relatively ideal droplet size, and has a strong condensing and wrapping effect on coal dust, which can effectively reduce dust pollution on the work site and ensure the occupational health and safety of workers.
聂文, 许长炜, 彭慧天, 张少波. 矿井新型增润促凝喷雾降尘剂的研制与抑尘性能研究[J]. 材料导报, 2023, 37(15): 22030228-9.
NIE Wen, XU Changwei, PENG Huitian, ZHANG Shaobo. Development and Research on Dust Suppression Performance of a New Type of Spray Dust Suppressant for Increasing Moisturizing and Accelerating Coagulation in Mines. Materials Reports, 2023, 37(15): 22030228-9.
1 Yuan L, Zhang N, Kan J G, et al. Journal of China University of Mining & Technology, 2018, 47(1), 1(in Chinese). 袁亮, 张农, 阚甲广, 等. 中国矿业大学学报, 2018, 47(1), 1. 2 Cheng W M, Zhou G, Chen L J, et al. Coal Science and Technology, 2020, 48(2), 1(in Chinese). 程卫民, 周刚, 陈连军, 等. 煤炭科学技术, 2020, 48(2), 1. 3 Gu D Z, Li Q S. Journal of China Coal Society, 2021, 46(3), 950(in Chinese). 顾大钊, 李全生. 煤炭学报, 2021, 46(3), 950. 4 Jin L Z, Li J P, Sun Y F. Theory of mine dust control, Science Press, China, 2009, pp.13(in Chinese). 金龙哲, 李晋平, 孙玉福. 矿井粉尘防治理论, 科学出版社, 2009, pp.13. 5 Shi X X, Jiang Z G, Sun Y F. Journal of Safety Science and Technology, 2005, 1(1), 41(in Chinese). 时训先, 蒋仲安, 褚燕燕. 中国安全生产科学技术, 2005, 1(1), 41. 6 Zhou G. Study on theory and technology of spray dust removal in fully mechanized caving face. Ph. D. Thesis. Shandong University of Science and Technology, China, 2009(in Chinese). 周刚. 综放工作面喷雾降尘理论及工艺技术研究. 博士学位论文, 山东科技大学, 2009. 7 Yuan L. Study on automatic positioning spray dust control system for fully mechanized mining face. Ph. D. Thesis. Jinan University, China, 2016(in Chinese). 袁雷. 综采面自动定位喷雾降尘控制系统研究. 博士学位论文, 济南大学, 2016. 8 Sampurna A, Joseph S, Thomas N. Safety Science, 2018, 110, 204. 9 Wang H T, Wang C, Wang D M. Powder Technology, 2017, 320, 498. 10 Tessum M W, Raynor P C. Safety and Health at Work, 2017, 8(3), 296. 11 Yang J, Liu D, Liu B J, et al. International Journal of Minerals Metallurgy and Materials, 2014, 21(3), 205. 12 Xu C H, Wang D M, Wang H T, et al. Process Safety and Environmental Protection, 2019, 121, 69. 13 Cheng S Y, Hao Y H, Xin Y L, et al. Chinese Journal of Environmental Engineering, 2013, 7(9), 3578(in Chinese). 程淑艳, 郝艳红, 辛云岭, 等. 环境工程学报, 2013, 7(9), 3578. 14 Luo R D, Lin M S, Luo Y B, et al. Journal of China Coal Society, 2016, 41(S2), 454(in Chinese). 罗瑞冬, 林木松, 罗运柏, 等. 煤炭学报, 2016, 41(S2), 454. 15 Adamczyk W P, Isaac B, Parra-Alvarez J, et al. Energy, 2018, 160, 693. 16 Banerjee S, Agarwal R. Applied Energy, 2015, 160, 552. 17 Zhang S B, Nie W, Guo C, et al. Building and Environment, 2021, 203, 108059. 18 Shakeel M R, Sanusi Y S, Mokheimer E M A. Applied Energy, 2018, 228, 68. 19 Zhang Z, Lu Y, Roskilly A P, et al. Fuel, 2019, 237, 28. 20 Ma Qingxin, Nie Wen, Yang Shibo, et al. Environmental Pollution, 2020, 264, 114717. 21 Kumar A, Kim M H. Energy, 2016, 103, 75. 22 Zhang J, Peng Y T, Liu Q Z. China Powder Science and Technology, 2017, 23(2), 20(in Chinese). 张静, 彭玉涛, 刘邱祖. 中国粉体技术, 2017, 23(2), 20. 23 Guo C, Nie W, Xu C W, et al. Journal of Cleaner Production, 2020, 276, 123632. 24 Xu C W, Nie W, Liu Z Q, et al. Energy, 2019 (182), 544. 25 Peng H T. Study on field atomization rule and efficient spray dust suppression technology in full-mechanized mining face of mine. Master's Thesis. Shandong University of Science and Technology, China, 2018(in Chinese). 彭慧天. 矿井综采工作面雾场雾化规律与高效喷雾降尘技术研究. 硕士学位论文, 山东科技大学, 2018.
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2023, Vol. 37 
