Study on the explosion suppression performance of methane-air mixtures based on NH4H2PO4-modified dry water gel

IF 1.1 4区工程技术 Q4 THERMODYNAMICS

Thermal Science Pub Date : 2025-07-04 DOI:10.2298/tsci250411125s

Hao Sun, Guoxun Jing, Chuang Liu, Hailin Jia

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引用次数: 0

Abstract

As a vital energy source, CH4 poses significant explosion risks that threaten industrial safety. To address the limitations of conventional CH4 explosion suppressants, a modified dry water gel ( \mathrm{NH_4}\mathrm{H_2}\mathrm{PO_4} -SCDW) was prepared by incorporating 5 wt.% \mathrm{NH_4}\mathrm{H_2}\mathrm{PO_4} , 0.1 wt.% sodium alginate, and 0.05 wt.% calcium lactate. The physical properties and explosion suppression performance of the composite were systematically evaluated. Experimental results showed that NH?H?PO?-SCDW exhibited not only excellent structural stability and water retention capability, but also rapid water release under high temperature conditions, thereby effectively suppressing explosions. In pipeline explosion tests, \mathrm{NH_4}\mathrm{H_2}\mathrm{PO_4} -SCDW exhibited significantly better suppression performance than conventional dry water, with the peak overpressure at pressure sensor 1# reduced by approximately 16.95% on average, and the flame propagation distance shortened by 24.13% at a spray dosage of 0.48 g. Mechanism analysis revealed that \mathrm{NH_4}\mathrm{H_2}\mathrm{PO_4} -SCDW suppresses methane combustion through the synergistic effects of physical and chemical inhibition, effectively interrupting the combustion chain reaction. This study provides theoretical support and experimental evidence for the development of high-efficiency and environmentally friendly fire and explosion suppressants.

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基于nh4h2po4改性干水凝胶的甲烷-空气混合物抑爆性能研究

甲烷作为一种重要的能源，具有重大的爆炸风险，威胁着工业安全。为解决传统CH4抑爆剂的局限性，以5% wt.% \ mathm {NH_4}\ mathm {H_2}\ mathm {PO_4}、0.1% wt.%海藻酸钠和0.05 wt.%乳酸钙为原料，制备了一种改性干水凝胶（\ mathm {NH_4}\ mathm {H_2}\ mathm {PO_4} -SCDW）。系统地评价了复合材料的物理性能和抑爆性能。实验结果表明，NH?H?PO？-SCDW不仅具有优异的结构稳定性和保水能力，而且在高温条件下能快速放水，有效抑制爆炸。在管道爆炸试验中，喷施量为0.48 g时，\ mathm {NH_4}\ mathm {H_2}\ mathm {PO_4} -SCDW的抑制性能明显优于常规干水，压力传感器1#处的峰值超压平均降低约16.95%，火焰传播距离缩短24.13%。机理分析表明，\ matthrm {NH_4}\ matthrm {H_2}\ matthrm {PO_4} -SCDW通过物理和化学抑制的协同作用抑制甲烷燃烧，有效阻断燃烧链式反应。本研究为开发高效环保的灭火剂提供了理论支持和实验依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thermal Science 工程技术-热力学

CiteScore

2.70

自引率

29.40%

发文量

399

审稿时长

5 months

期刊介绍： The main aims of Thermal Science to publish papers giving results of the fundamental and applied research in different, but closely connected fields: fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes in single, and specifically in multi-phase and multi-component flows in high-temperature chemically reacting flows processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering, The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.