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首页> 外文学位 >Evaluation of countercurrent gasification as a thermochemical method to remediate an industrial sludge.
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Evaluation of countercurrent gasification as a thermochemical method to remediate an industrial sludge.

机译：评估逆流气化作为热化学方法来补救工业污泥。

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Countercurrent gasification is a member of a class of thermal remediation processes which includes incineration and pyrolysis, and is an outgrowth of in-situ underground coal gasification. Remediation of waste using this processs consits of combining char and waste, followed by gasifyng the mixture. The organic components in the waste are converted to a synthesis gas, primarily CO and H{dollar}sb2{dollar}, and only a small amount of the char is consumed.; In this dissertation, an evaluation of the process for remediation of an industrial waste, an oily sludge which consists of styrene and petroleum wastes, was undertaken. The factors considered were: (1) Understanding of the physical and chemical basis for treatment; (2) Feasibility for the process; (3) Effectiveness for the process; (4) Potential for commercialization.; This research showed that the destruction of the sludge was feasible and effective. Specifically, the sludge was immobilized on the char and effectively made manageable for processing. The optimum loading of oil on the char was found to be about 25% by weight. The gasification of the sludge produced a clean-burning synthesis gas, containing the expected products, CO, CO{dollar}sb2{dollar}, H{dollar}sb2{dollar}O, H{dollar}sb2{dollar} and CH{dollar}sb4{dollar}, and only small amounts of short chain hydrocarbons. The char product was found to be reusable for at least four cycles of remediation.; Thermodynamic analysis of the process predicts that of the available energy content in the system to be gasified, a maximum of 53% can be recovered in the form of synthesis gas. Of the remainder, 35% will be converted to waste heat and 12% will be sensible heat. The analysis also predicts the composition of the gas product, and the observed composition was found to differ somewhat from that predicted.; The results presented indicate that the commercialization potential of the process is favorable for the application studied.
机译：逆流气化是包括焚化和热解在内的一类热修复过程的成员，并且是地下地下气化的产物。使用此过程对废物进行补救是将炭和废物合​​并，然后将混合物气化。废物中的有机成分转化为合成气，主要是CO和H {sb2 {dollar}，仅消耗少量的焦炭。本文对工业废料（一种由苯乙烯和石油废料组成的油性污泥）的修复方法进行了评估。考虑的因素包括：（1）了解治疗的理化基础； （2）该过程的可行性； （3）过程的有效性； （4）商业化潜力。研究表明，污泥的消灭是可行和有效的。具体而言，污泥被固定在焦炭上，并有效地进行了处理。发现焦炭上油的最佳负载为约25重量％。污泥的气化产生清洁燃烧的合成气，其中包含预期产物CO，CO {dollar} sb2 {dollar}，H {dollar} sb2 {dollar} O，H {dollar} sb2 {dollar}和CH {美元} sb4 {美元}，只有少量的短链碳氢化合物。已发现炭产品可重复使用至少四个修复周期。该过程的热力学分析预测，要气化的系统中的可用能量含量中，最多可以以合成气的形式回收53％。其余的35％将转化为废热，而12％为显热。该分析还预测了气体产物的组成，发现观察到的组成与预测的有所不同。给出的结果表明该方法的商业化潜力对于所研究的应用是有利的。

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