The risk of coal dust explosion threatens the safety of coal gasification process. To reveal the inhibition of carrageenan dry-water material (CDM) on coal dust explosion, a 20 L spherical explosive device was adopted to compare with SiO₂ and NH₄H₂PO₄ at the atmosphere of coal gasification. The thermal decomposition behavior and chemical structures of the explosion residues were characterized by synchronous thermal analyzer, X-ray photoelectron spectroscopy and FTIR. The results indicate that the CDM showed the optimal inhibiting effect on 300 mesh and the maximum explosion pressure of anthracite coal dust was reduced to 0.02 MPa with the percentage of 97.53%. At the same concentration, the inhibiting effect of CDM on the coal dust explosion was better than that of SiO₂ and weaker than that of NH₄H₂PO₄. Through the residues analysis, the CDM mainly prevented the volatilization of C-H and consumption of oxygen-containing groups and sulfur-containing groups contributing to the inhibition of coal dust explosion.

煤尘爆炸的风险威胁着煤气化过程的安全。为揭示卡拉胶干水材料(CDM)对煤尘爆炸的抑制作用，采用20 L球形爆炸装置与SiO ₂和NH ₄ H ₂ PO _{4 进行比较}在煤气化气氛下。采用同步热分析仪、X射线光电子能谱和FTIR对爆炸残留物的热分解行为和化学结构进行了表征。结果表明，CDM对300目筛网的抑制效果最佳，无烟煤粉尘的最大爆炸压力降至0.02 MPa，抑制率为97.53%。相同浓度下，CDM对煤尘爆炸的抑制作用优于SiO ₂，弱于NH ₄ H ₂ PO ₄. 通过残留分析，CDM主要阻止了CH的挥发和含氧基团和含硫基团的消耗，有助于抑制煤尘爆炸。