共查询到20条相似文献,搜索用时 15 毫秒
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废轮胎热解资源化研究新进展 总被引:3,自引:2,他引:3
用热解法处理废旧轮胎能够实现能源的最大回收有价值产品的充分再利用,代表了当今废旧轮胎处理的发展方向。本文重点介绍了废轮胎的热解机理,热解动力学,热解过程控制及其产品特性的研究进展,并对今后废轮胎热解资源化研究发展方向提出了建议。 相似文献
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A Preliminary Study of the Plasma Pyrolysis of Waste Tyres 总被引:1,自引:0,他引:1
Thermal plasma pyrolysis of waste tyres for recovering energy was performed in a nitrogen plasma reactor. The main gaseous products were identified by chromatography as H2, CO, CH4, C2H2 and so on. From a series of experiments, the effects of the process parameters of thermal plasma pyrolysis were investigated. Under our experimental conditions with steam injection, the total contents of H2 and CO reached up to 38.3% in the gas product, C2H2 up to 4%, and the maximum calorific value of the pyrolysis gas was 8.96 MJ/m3. The results indicate that plasma-assisted thermal decomposition of waste tyre particles may be a useful way for recovering energy and useful chemicals. 相似文献
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以含氧木屑为探针材料,同废轮胎以不同比例共热解以准确控制其氧含量,考察氧含量对热解废轮胎得到的气、液、固三相产物的影响及多环芳烃(PAHs)含量的影响。采用热重分析仪(TG)、元素分析仪(EA)以及气相色谱仪(GC)分别对它们热行为、热解油中氧含量及PAHs的变化规律进行了观察。TG分析表明,木屑中氧含量对废轮胎热解最大失重速率发生的温度产生了推后的影响。在木屑∶废轮胎质量为2∶1时,温度滞后3.7℃。EA分析表明,热解油中氧含量越高,氢含量较加权值越低,碳含量基本不变。GC分析表明,适量木屑所含的氧能够有效抑制PAHs的生成;对三相产物影响表明,氧含量越高,液体产率较加权值越小,气体产率较加权值越大,固体产率较加权值有所降低但与氧含量多少关联不明显。通过木屑和废轮胎共热解过程氧含量对热解产物影响的分析,为科学利用生物质、合理处置废轮胎提供科学帮助。 相似文献
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非平衡等离子体在水处理技术中的应用及研究 总被引:1,自引:0,他引:1
非平衡等离子体水处理方法是一项高效、无二次污染的绿色环保技术。它具备高温热解、光化学氧化、高能电子、超临界水氧化等多种方法的综合效应,有广泛的适用性。本文系统介绍了非平衡等离子体技术在废水处理中的应用,通过总结和分析目前研究中存在的不足,提出该技术今后发展的方向。 相似文献
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低温等离子体直接处理液体物料技术的研究进展 总被引:5,自引:0,他引:5
综述了常压低温等离子体直接处理液体物料技术在化工环保方面的研究进展。低温等离子体电解时能够分解溶剂、溶质分子,产生常规电解所不会出现的产物和可得到多于常规电解的产量,在现代化工环保中具有广阔的应用前景。结合辐射机理和两反应区域模型,可以较好地解释低温等离子体电解所具有的非法拉第现象。分析了无声放电法、高压脉冲直流放电法和接触辉光放电法低温等离子体直接处理废水技术的特点。常压低温等离子体是独特的杀菌介质,此杀菌技术的研究目前仍然处于起步阶段,探讨了此领域的研究重点。 相似文献
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煤等离子热解制乙炔反应器可用能利用研究 总被引:2,自引:1,他引:2
介绍了煤等离子热解制乙炔的工艺过程及煤等离子热解制乙炔反应器装置的结构形式。通过对煤等离子热解反应器系统的热力学分析,得出了该反应器系统的分析模型,分析了(yong)损失产生的原因,提出降低损失的措施。改进后的反应器系统采用淬冷器、换热器的多级热传递及原料的预热等热量利用方式。实验结果表明,改进后的反应器系统的(yong)损失由改进前的591.4kJ/kg—coal下降为448.0kJ/kg—coal,减少了24.2%。 相似文献
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用电感耦合等离子体发射光谱(ICP-AES)法测定钛白粉中的二氧化钛,试样用硫酸和硫酸铵加热分解,盐酸溶解盐类。通过与GB1706-2006结果对照,表明,方法的RSD为0.45%。 相似文献
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采用内循环生物流化床系统,通过控制曝气时间和溶解氧浓度,能同时脱氮除磷.含氮、磷进水COD为352~1 048 mg/L,总氮(TN)为46.9~76.4 mg/L, 总磷(TP)在5.8~14.4 mg/L时,COD 、总氮(TN)、总磷(TP)去除率分别为92%、80%、93%,出水可达到国家二级排放标准. 相似文献
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This is the first study to optimize the hydrodynamics of a Plasma Lift Reactor (PLR). A PLR is designed to break down organic contaminants in aqueous solutions. Original experimental results are presented for both water‐air tests, and for plasma degradation of organic contaminants in Bayer liquor. In addition, a multiphase Computational Fluid Dynamics model has been developed, which predicts the hydrodynamic behaviour in the PLR. Results suggest the PLR is most effective at high liquid recirculation rates that occur with a long (568 mm) draft tube, moderate spacing (25.4 mm) between the draft tube and reactor base, and with a gas flow rate of a superficial velocity of 0.3m/s. Other parameters such as reactor fill volume were insignificant. 相似文献
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建立电感耦合等离子体串联质谱(ICP-MS/MS)法在多元素分析中的应用.高纯硅微粉经氢氟酸+硝酸微波消解后直接采用ICP-MS/MS测定其中8个常见杂质元素(Na、Mg、Al、K、Ti、Fe、Cu、Zn).在MS/MS模式下,通过向碰撞反应池(CRC)中通入NH3/He,利用目标离子与NH3/He发生反应消除多原子离子质谱干扰,其中Na、Mg、Al、K、Zn采用NH3/He原位质量测定,Ti、Fe、Cu采用NH3/He质量转移测定,考察了NH3/He反应气流速待测元素分析结果的影响,优化并获得了最佳NH3/He反应气流速.选择Sc为内标元素校正样品传输、雾化效率以及信号强度变化时所产生的误差.8个待测元素的检出限为0.001~0.76μg/L,采用所建立的方法分析国家标准物质石英岩(GBW07835),测定结果与标准物质所提供的验证值基本一致,相对标准偏差(RSD)≤5.5%,表明方法具有准确性好和精密度高的特点,可用于高纯硅微粉中多个杂质元素的准确分析. 相似文献
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用氧等离子体对聚丙烯(PP)粉体进行表面处理,采用水接触角(WCA)、红外光谱(IR)对处理前后PP粉体的水接触角、表面组分的变化进行了分析。实验结果表明,随着等离子体处理时间延长,水接触角减小。IR分析表明,在氧等离子体处理中,PP粉体表面有含氧极性官能团生成,导致粉体表面水接触角减小。 相似文献
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针对炼油废碱液污染浓度高、可生化性差的特点,采用水解与接触氧化组合工艺进行处理。结果表明,废液经水船处理后,COD的平均降解率为12.2%,废水的B/C比由进水的23.7%提高到30.0%;这样,不仅废液的污染程度得到了一定的降低,而且其可生化性也得到了较大约改善。而后续的接触氧化处理使废液的COD和硫化物污染指标平均降解率分别达到25.0%和97.1%。 相似文献
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The unsymmetrical diglycolamide, di-dodecyl-di-octyl diglycolamide (D3DODGA) is a modifier-free extractant proposed for partitioning of trivalent actinides from nitric acid medium. D3DODGA has been evaluated for the feasibility of using it in the absence of a phase modifier, for the partitioning of minor actinides from fast reactor high-level liquid waste (FR-HLLW). The extraction behavior of various metal ions present in the simulated FR-HLLW was studied in a solution of 0.1 M D3DODGA/n-dodecane from nitric acid medium. The distribution ratio of about 20 metal ions was measured as a function of concentration of nitric acid and other interfering ion. The extraction was found to be strongly dependent on the oxidation state of the metal ion. The extraction of Am(III) from 3–4 M nitric acid medium was quantitative in a single contact. However, it was accompanied by the quantitative extraction of fission products such as trivalent lanthanides (Ln(III)), Y(III), and Zr(IV). The extraction of Sr(II), Pd(II), and Ru(III) in 0.1 M D3DODGA/n-dodecane was not insignificant, but quite low. The extraction of Ba(II), Ni(II), Mo(VI), and Fe(III) was marginal and the extraction of Co(II), Sb(III), Mn(II), and Cs(I) in 0.1 M D3DODGA/n-dodecane was negligible. Our results indicated that 0.1 M D3DODGA/n-dodecane is a promising candidate for the separation of trivalent actinides from fast reactor high-level liquid waste containing significant quantities of trivalent lanthanides and actinides. 相似文献