Co-pyrolysis of Sewage Sludge with Distillation Residue: Kinetics Analysis via Iso-conversional Methods

This study explored the synergistic interaction of sewage sludge(SS)and distillation residue(DR)during co-pyrolysis for the optimized treatment of sewage sludge in cement kiln systems,utilizing thermogravimetric analysis(TGA)and thermogravimetric analysis with mass spectrometry(TGA-MS).The results reveal the coexisting synergistic and antagonistic effects in the co-pyrolysis of SS/DR.The synergistic effect arises from hydrogen free radicals in SS and catalytic components in ash fractions,while the antagonistic effect is mainly due to the melting of DR on the surface of SS particles during pyrolysis and the reaction of SS ash with alkali metals to form inert substances.SS/DR co-pyrolysis reduces the yielding of coke and gas while increasing tar production.This study will promote the reduction,recycling,and harmless treatment of hazardous solid waste.

Co-pyrolysis of Sewage Sludge with Paint Sludge: Kinetics and Thermodynamic Analysis via Iso-conversional Methods

This study explored the synergistic interaction of sewage sludge(SS)and automotive paint sludge(PS)during co-pyrolysis for the optimized treatment of sewage sludge in cement kiln systems,utilizing thermogravimetric analysis(TGA)and thermogravimetric-mass spectrometry(TGA-MS).The result reveals the coexisting synergistic and antagonistic effects in the co-pyrolysis of SS/PS.The synergistic effect arises from hydrogen free radicals in SS and catalytic components in PS,while the main source of the antagonistic effect is that,during the mechanical mixing process,the SS/PS is converted from the particulate form into a dough-like rubbery which contributes to the film-forming effect,hindering the volatilization of volatile components.SS/PS co-pyrolysis reduces the yielding of tar production while increasing coke and gas.This study will provide some in-depth insights into the co-pyrolysis of SS/PS,and offer theoretical support for the subsequent research on the collaborative disposal processes in cement kilns.

论BIM技术在水泥行业的应用

BIM技术能提供的功能诸如可视化全厂漫游功能、装备细观和拆装功能、防碰撞检测功能、工程资料查阅功能、便捷的出图功能,已被广泛应用于建筑设计和施工管理中。作为一个新工业时代的发展方向,如何将其更好地应用在水泥行业中,是当前水泥工作者关注的一个焦点问题。通过示例介绍如何在水泥工厂的设计、施工及生产运行维护中开展BIM技术的应用,并简述其在数值模拟研究方面的应用情况,以期为BIM技术在水泥行业的应用提供技术参考,使得BIM技术在水泥领域的应用得到不断发展并为行业带来先进的生产力。

高原环境下TTF分解炉褐煤-烟煤混燃增效机制研究

用Fluent软件对国内某高原水泥厂TTF分解炉进行掺杂褐煤混燃的数值模拟分析,研究分解炉褐煤-烟煤混燃增效机制。研究结果表明:在高原环境下加入30%~50%的褐煤能有效改善分解炉内燃料的燃烧状态,可降低混合燃料的着火点,增加分解炉内煤粉的燃尽率,同时有利于分解炉内形成均匀分布的温度场;同时在所研究的高原环境中当燃料各组分等比例混燃时增效效果最为显著,表现在这种比例下,混煤挥发分析出的程度最好,使分解炉的温度分布更加均匀,进而也使得窑系统内热力型NO_(x)排放量减少;此外与单独燃烧烟煤相比,温度场的改善也归功于混煤固定碳燃尽阶段的滞后。