高浓度化纤废水的处理及回用

高浓度化纤废水处理难度大、费用高，采用UASB厌氧处理，可将难降解的大分子有机物分解为小分子有机物，再通过多级接触氧化和生物炭池处理，出水COD浓度〈50mg／L（对COD的去除率高达99％），达到《污水综合排放标准》（GB8978-1996）一级标准。工程实践表明，UASB的实际容积负荷超过设计值，而多级串联接触氧化池中各级微生物的数量及形态保持相对独立，表现出类似于AB工艺的特征，具有处理效果好、运行稳定、投资少等优点。     

新型碳质催化剂用于NH3选择性催化还原NOx的研究

以城市污水处理厂剩余污泥为原料制备了一种新型碳质催化剂。通过试验考察了催化剂在NH₃选择催化还原NO中的应用效果。结果表明,催化性能较好，最佳的制备和催化反应条件为：锌铁物质的量比1∶0.5，热解温度750 ℃，反应温度400 ℃，O₂浓度15%。在此条件下，NOx的最大转化率达98.3%。通过考察证明催化剂自身具有一定的还原性能。对催化剂进行了FTIR、TG、SEM和BET分析，结果表明，催化剂具有很丰富的孔结构、活性粒子和表面官能团，比表面积较大，最大可达307 m²·g^-1，分析结果显示具有良好的催化条件。     

CFD simulation on performance of new type umbrella plate scrubber

A new type of umbrella plate scrubber was developed to address the pollution due to the dust, dioxide sulfur and other harmful gases, which were emitted from coal-burning boilers. The performance of the new device was studied through computational fluid dynamics（CFD） simulation and experiment methods. Initial work included experimental measurement of inlet-velocity, and gas phase simulation using Reynolds stress model（RSM）. After gas phase was converged, particles were injected from the inlet of the new device. Discrete phase model（DPM） was used for particle trajectories determination. The pressure drop and the collection efficiency of the new device were predicted through simulation. The simulation results show that the pressure drop of the new devices is 230-250 Pa and the efficiency is 84%-86%, with the inlet velocity equal to 10.6 m/s and the dust concentration ranging from 2 to 22 g/m3. The CFD simulation results of the new device show good agreement with experimental data. The relative error of the pressure drop and the efficiency is approximately 4% and 10% respectively. The results obtained both from the numerical simulation and from the experiment demonstrate that CFD simulation is an effective method for this type of study.     

烹饪油烟净化技术发展的探讨

随着我国餐饮业的飞速发展,油烟带来的环境污染日益严重。餐饮业油烟污染问题成为城市居民环保投诉的热点之一。简要说明了油烟形成过程、成分组成及对人体健康的危害,同时介绍了处理油烟的新方法——生物降解法、等离子体法等,并对国内外净化技术进行了对比。总结提出催化氧化法适用于家庭油烟净化,并有待进一步研究开发以应用于实际生活中。     

铝合金尾料回炉烟气的治理

本文通过铝合金尾料回炉烟气治理的实例，介绍了排网革的设计及计算方法，除尘、消烟及去除有害气体的原理，以及装置的防腐防磨措施。     

Experiment and simulation of diffusion of micron-particle in porous ceramic vessel

The general behavior of micron-particles in the inner domain of porous ceramic vessel was simulated by computational fluid dynamics software in terms of sampling experimental data.The results show that there is an optimum porosity of 0.32 to get a higher efficiency and lower pressure drop during filtration.According to the results of simulation and experiment,it is evident that lower inlet velocity can maintain lower pressure drop and obtain higher collection efficiency and inlet concentration also has a crucial influence on the collection efficiency.The collection efficiency of equipment increases significantly with the increase of inlet concentration when the inlet concentration is less than 6.3 g/m3,but it gradually tends to be stable in the range of 97.3%-99.7%when the inlet concentration is over this concentration.     

SCR系统结构模型与数值模型的适用性分析

针对火电厂SCR系统数值计算中结构模型与数值模型准确性与适应性等问题,建立完整与不完整的SCR系统结构模型,运用标准κ-ε模型与Realizable κ-ε模型对其进行数值计算。通过与实测速度值对比,分析湍流模型与省煤器出口、灰斗、喷氨格栅、均流格栅结构对流场计算准确性的影响;通过与实测压降、出口NO_x浓度分布、出口NH₃逃逸分布的对比,分析与论证多孔介质模型、多组分反应模型中参数设定的理论性与准确性。结果表明：标准κ-ε模型与Realizable κ-ε模型都能准确计算SCR系统内烟气流场与压降特性;省煤器出口与喷氨格栅结构对进口烟道内流场的准确计算影响显著;单层催化剂压降模拟值与实验值之间的相对误差为-1.9%;NO_x脱除效率模拟值79.35%与实测值80.56%间的相对误差为-1.5%,且两者NH₃逃逸分布趋势一致。     

火法炼锑生产过程中二氧化硫废气的治理

利用石灰溶液 ,采用湍球和旋流板组合净化装置对锑冶炼生产中的二氧化硫废气进行吸收治理。确定了装置最佳工作条件 ,净化效率达 96 %。经处理后气体中的二氧化硫浓度均达到了国家一级排放标准     

湿式旋风除尘脱硫技术

介绍一种湿式旋风除尘脱技术，实验和工业应用表明，该技术除尘器效率大于９７％，具有一定的脱硫效果，设备阻力小于１２００Ｐａ，是烟气治理的理想技术。