Application of Combined Ozone–Hydrogen Peroxide for the Removal of Aromatic Compounds from a Groundwater

Nitro and chlorobenzene compounds, which are widely used in dye industries, have been associated recently with groundwater contamination. Because of their potential toxicity and for taste and odor considerations, three main actions were undertaken to solve the problem. First, to follow the advance of pollution toward the wells, samples were collected automatically and analyzed using GC-MS. Results indicate that o-chloronitrobenzene was the main pollutant in concentrations ranging from 10 to 2000μg/L. Second, to monitor the drinking water quality, an on-line spectrophotometer was used to measure the optical density at 254 nm at the inlet and outlet of the plant. Third, the feasibility of using the O₃/H₂O₉ combination was determined at a 450 L/h pilot plant. Reduction of concentrations of chloronitrobenzenes from 1900 μ/L to less than 20 μg/L could be reached by the application of 8 mg O3/L and 3 mg H2O9/L with a 20-minute contact time. To avoid an eventual bacterial egrowfn in the network due to biodegradability of the oxidation by-products, sand and GAC filtration were tested after oxidation. An evaluation of the costs of these different treatments is also presented.     

某混合粗精矿铜铅分离选矿试验研究

混合粗精矿Cu品位8.51%、Pb品位15.23%;样品中黄铜矿、方铅矿包裹体较多,粒度较细,针对该样品性质,主要从浮选、重选角度进行铜铅分离试验研究,最终推荐粗精矿精选—铜铅分离(抑铅浮铜)—重选提高铅品位联合工艺流程;抑铅浮铜工艺采用自行设计的无氰、低铬、无污染组合抑制剂RBT-2,使铜、铅达到有效分离;最终可获得Cu品位21.50%、含Pb 4.57%、Cu回收率69.92%的铜精矿;Pb品位46.89%、含Cu 0.82%、Pb回收率55.39%的铅精矿。此流程中重选提高铅精矿品位工艺,使铅矿物得以富集,分离效果明显,获得了Pb品位大于40%的铅精矿。     

黑钨矿捕收剂的应用及其使用后水中残留物的去除

通过分析黑钨矿浮选药剂应用现状,总结近年来黑钨矿浮选捕收剂应用实践。其中含胂和膦的脂肪酸类捕收剂含有有害金属,对环境中土壤以及水有极大的污染;螯合剂使用前需预先处理,不仅增加了成本和流程复杂,同时也危害环境;组合药剂的使用提高了药剂效率,节约资源,通过减少使用对环境有污染的药剂,保护了环境。并采用PAC、PFS及其组合絮凝剂对捕收剂使用后废水进行处理,结果表明:PAC及PAC+PFS处理后废水排放达到《污水综合排放标准》(GB8978-1996)的一级标准,而PFS处理则没有达到一级标准。     

A Novel Quantum Entanglement-Inspired Meta-heuristic Framework for Solving Multimodal Optimization Problems

To solve Multimodal optimization prob-lems (MOPs), a Novel Quantum entanglement-inspired meta-heuristic framework (NMF-QE) is proposed. Its main inspirations are two concepts of quantum physics:quantum entanglement and quantum superposition. When given Proto-born particles (PBPs) of a population, these two concepts are mathematically developed to generate twin-born and combination-born particles, respectively. And if any elite-born particles would be created by a local re-searching strategy. These three or four groups of particles come together as a whole search population of NMF-QE to realize exploration and exploitation of algo-rithms. To guarantee dynamical optimization capability of NMF-QE, the individual evolutionary mechanism of some existing meta-heuristics will be adopted to iteratively create PBPs. A selected meta-heuristic is coupled with NMF-QE to present its improved variant. Numerical results show that the proposed NMF-QE can effectively improve optimization performance of meta-heuristics on MOPs.     

Research on Combination Winding of Revolving Bodies

A methematical model based upon the theory of differential geometry isestablished for the combination winding of revolving bodies and programs are developedfor the filament winding operations as well.Trial winding on a filament winding machineproved this model is right and useful.     

防泵轴头甩油新结构的研制开发

通过对泵原结构轴头甩油原因分析，指出了漏油原因。研制出防止轴头甩油的离心密封和螺旋密封组合的新结构。利用离心密封作为初步节流阻漏密封，利用螺旋密封作二次密封。这种改进方法只需改造轴承箱压盖和轴承锁紧螺母，对原结构改动很小，即能满足密封要求，又能适应原结构可利用空间小的限制。实际使用效果良好，有普遍推广价值。     

搅拌器优化组合在大型发酵罐中的应用

介绍了搅拌器优化组合后在大型发酵罐中的应用情况     

我国独立焦化厂的发展战略

介绍了我国焦化工业的现状和高炉大型化对焦炭质量的要求,分析了我国独立焦化厂发展面临的积极因素和不利因素,提出了独立焦化厂与上游煤矿联合,向下游钢铁企业延伸的发展战略。独立焦化厂应严格管理,降低成本,节能减排,对焦炉煤气进行综合利用,提高经济效益。     

MINLP‐Optimierung des Hybridverfahrens Destillation/Schmelzkristallisation

The hybrid separation process distillation/melt crystallization offers a cost wise attractive alternative compared to conventional distillation processes. In this work, the systematic and cost optimal design of this combination process is considered. The focus is on the optimal choice of operating and structural degrees of freedom.     

南一区井震结合断层解释研究

随着油田开发进入高含水期,原有的基于井资料的断层解释已经不能满足油田开发对碡7i层描述的要求。采用井震结合断层解释方法,充分发挥井震资料各自的优势,提高断点组合率,使断层的空间组合和平面形态描述更加合理,提高断层描述精度。