Organic liquid mobility induced by smoldering remediation

JOURNAL OF HAZARDOUS MATERIALS

卷:325

Article

Kinsman, L.¹  Torero, J. L.²  Gerhard, J. I.¹ 

[1] Univ Western Ontario, Dept Civil & Environm Engn, London, ON N6A 5B9, Canada

[2] Univ Queensland, Sch Civil Engn, St Lucia Campus, St Lucia, Qld 4072, Australia

关键词: Remediation;    Smoldering;    Organic liquid;    Organic waste;    Liquid migration;    Thermal treatment;   

DOI  :  10.1016/j.jhazmat.2016.11.049

来源: Elsevier

【 摘 要 】

Laboratory column experiments plus analytical and numerical modeling together suggest that, under certain conditions, downward organic liquid mobilization can occur and impact smoldering behavior. This applies for organic liquids mixed with inert sand subjected to smoldering as thermal treatment. The observed effects include increased peak temperatures (here by up to 35%) and increased treatment times (here by up to 30%). Downward organic liquid migration occurs when (i) injected Darcy air flux is less than a threshold value (here less than 3 cm/s), (ii) treatment systems are tall (here 90 cm, not 30 cm), and (iii) the organic liquid is temperature-sensitive (viscosity less than 0.01 Pas at 150 degrees C). The developed analytical equation provides the applied air flux that can negate the downwards organic liquid gradient required for migration. Smoldering behavior is demonstrated to adjust to liquid migration and thereby still destroy all the organic waste in the system. Smoldering is a relatively new, energy-effiCient thermal treatment for organic liquid waste and these results are important for designing field applications of smoldering treatment. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free