造纸废液对水煤浆成浆性能及其气化的影响规律

The Impact of Papermaking Waste Liquor on the Slurry Formation Performance and Gasification of Coal Water Slurry

摘要: 我国富煤、少气、贫油的资源禀赋赋予了煤的重要能源特性，水煤浆技术的开发不仅促进了煤的清洁化利用，其可以掺杂40%的水含量就可以消纳部分有机废水。本文采用造纸黑液作为制浆水相，研究了其成浆性能与气化气组成的变化，结果表明，黑液在稀释100倍时，作为水煤浆制浆液相，黑液水煤浆的粘度 < 1000 mPa∙s，浓度为61.1%，稳定性为99.74%，热值为22.32 MJ/kg，促进了水煤浆的形成与稳定，有利于煤的运输性能的提升。黑液水煤浆在CO₂-H₂O气氛条件下气化，有利于煤颗粒的分散、传热、裂解，促进了氢气与甲烷的形成，氢气含量提升了16.5%。该技术的研究促进了造纸黑液与煤的耦合利用，助力于洁净煤技术与造纸工业的高效清洁可持续发展。

Abstract: China’s resource endowment, characterized by abundant coal, limited gas, and scarce oil, bestows coal with a significant energy role. The development of coal water slurry (CWS) technology not only promotes the clean utilization of coal but also allows for the integration of up to 40% water content, thereby enabling the treatment of some organic wastewater. This study investigates the slurry formation performance and gas composition during gasification when black liquor from papermaking is used as the slurry phase. The results indicate that when the black liquor is diluted by 100 times, its use as a CWS slurry phase yields a viscosity of less than 1000 mPa∙s, a concentration of 61.1%, a stability of 99.74%, and a calorific value of 22.32 MJ/kg. These properties enhance the formation and stability of the coal slurry, improving its transportation performance. Gasification of the black liquor-based CWS in a CO₂-H₂O atmosphere facilitates coal particle dispersion, heat transfer, and pyrolysis, promoting the formation of hydrogen and methane, with hydrogen content increasing by 16.5%. This research supports the coupling of papermaking black liquor with coal, contributing to the advancement of clean coal technologies and the efficient, sustainable development of both the coal and papermaking industries.