Preparation and Properties of Coal-based Gasification Ash Fire-extinguishing Gel
ZHANG Duo1,†,*, SUN Wei1,†, GUO Ximan1, CEN Xiaoxin1, DAI Aiping2
1 School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China 2 School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
Abstract: Aiming at the problems of environmental pollution and waste of solid waste resources caused by the accumulation of coal-based gasification ash residues, coal mine fire extinguishing material, gasification ash residue gel, was prepared using gasification residue as the base material and hydroxypropyl methylcellulose (HPMC) as the gelling agent. Coal mine fire-extinguishing materials were analyzed by scanning electron microscope and Fourier transform infrared spectrometer to analyze their microscopic morphology and surface functional group characteristics. Factors such as gelation time, thermal stability and water retention were investigated, and the optimal formulation of the gasification slag gel was determined to be the water-cement ratio of 1∶1.25 and the addition of HPMC of 1.5%. The reaction of functional groups, such as hydroxyl, methyl, methylene, substituted aromatic hydrocarbons and carbon-oxygen bonds, was inhibited during the spontaneous combustion of coal. At 80 ℃, the peak area of aromatic hydrocarbons decreased by 11.85%, and the peak area of aliphatic hydrocarbons decreased by 43.07%. The peak area of aromatic hydrocarbons decreased by 27.36% and the peak area of aliphatic hydrocarbons decreased by 44.23% at 120 ℃. During the oxidative heating process of the gel-treated coal samples, the CO concentration decreased by 65.07% at 100 ℃. The CO concentration decreased by 53.09% and the C2H4 concentration decreased by 23.68% at 200 ℃. The microscopic and macroscopic results showed that the spontaneous combustion process of coal was inhibited better by the gasification ash slag gel. Its chemical resistance was better than that of CaCl2, which could effectively prevent coal spontaneous combustion disasters. This solves the problem of ash accumulation, and realizes the resource utilization of solid waste.
通讯作者:
*张铎,西安科技大学安全科学与工程学院副教授、硕士研究生导师。2010年西安科技大学数学与应用数学专业本科毕业,2014年西安科技大学安全技术及工程专业硕士毕业,2018年于西安科技大学安全科学与工程专业博士毕业后留校工作至今。目前主要从事煤自燃机理与防治技术、火灾监测预警技术与灾害应急处置等方面的教学与科研工作。发表学术论文30余篇(其中SCI/EI期刊检索论文15篇),包括Fuel、Powder Technology、Combustion Science and Technology、Advances in Materials Science and Engineering、《煤炭学报》《煤炭科学技术》等。孙伟,西安科技大学安全科学与工程学院硕士研究生,本科就读于长安大学兴华学院土木工程专业,目前主要研究方向为煤矿区固废材料深度综合资源化利用理论与技术。zhangd@xust.edu.cn
作者简介: †共同第一作者
引用本文:
张铎, 孙伟, 郭曦蔓, 岑孝鑫, 代爱萍. 煤制油气化灰渣防灭火凝胶的制备及性能[J]. 材料导报, 2024, 38(3): 22040127-7.
ZHANG Duo, SUN Wei, GUO Ximan, CEN Xiaoxin, DAI Aiping. Preparation and Properties of Coal-based Gasification Ash Fire-extinguishing Gel. Materials Reports, 2024, 38(3): 22040127-7.
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2024, Vol. 38 
