50kt／a增塑剂装置扩产改造

在对国外引进装置进行工业试验，并从理论上进行技术分析基础上，应用高效规整填料塔技术对装置核心设备－－酯化精馏塔进行了改造，同时对附属设备进行更换和完善，经过一系列改造后，装置生产能力提高40％，生产成本降低，产品的竞争能力提高。     

Effective packing of 3-dimensional voxel-based arbitrarily shaped particles

In many research areas including medicine and paper coating, packing of particles together with numerical simulation is used for understanding important material functionalities such as optical and mass transfer properties. Computational packing of particles allows for analysing those problems not possible or difficult to approach experimentally, e.g., the influence of various shapes and size distributions of particles. In this paper a voxel-based algorithm by Jia et al. [X. Jia, R.A. Williams, A packing algorithm for particles of arbitrary shapes, Powder Technology 2001, vol. 120, pp. 175-186.] enabling the packing of arbitrarily shaped particles, is memory- and speed-optimised to allow for simulating significantly larger problems than before. Algorithmic optimisation is carried out using particle shell area reduction decreasing the amount of time spent on collision detection, fast rotation routines including lookup tables, and a bit packing algorithm to utilise memory effectively. Presently several hundreds of thousands of complex arbitrarily shaped particles can be simulated on a desktop machine in a simulation box consisting of more than 10⁹ voxels.     

用离子交换法从拜耳工艺溶液中提取镓的工业实践

介绍了采用密实移动床吸附塔、以离子交换法从拜耳工艺溶液中提取镓的扩大试验结果。树脂吸附镓饱和以后，用特制的碱性络合淋洗剂淋洗。淋洗合格液经蒸发浓缩、冷冻结晶、氧化等工序处理后再进行电解，可获得产品镓，贫树脂经转型后可返回吸附工序再使用。本工艺流程简单，操作方便，试剂用量少，产品成本低，对环境无污染，镓吸附率可达60％－65％，淋洗率大于90％，电解回收率大于90％。     

Charged polaron-enhanced circular dichroism of optically nonlinear 3-nitroaniline crystal

The circular dichroism (CD) spectra in visible range of the 3-nitroaniline (m-NA) single crystal, of its solution in chloroform, and in the KBr pellet were recorded. Neither the molecular (m or C_s) nor the crystal (mm2 or C_2v) point groups belong to the chiral groups. The DFT calculation of CD spectrum of the m-NA isolated neutral molecule confirmed its chirality. The red shifted bands in the calculated CD spectrum of m-NA radical anion (charged polaron), as compared with the neutral molecule, resemble better the spectra of solids than that of the solution. It seems that these facts corroborate qualitatively the “hop and turn” model explaining the m-NA optical nonlinearity and electric conductivity proposed in Szostak et al. [M.M. Szostak, H. Chojnacki, E. Staryga, M. D?u?niewski, G. B?k, Chem. Phys. 365 (2009) 44-52].     

Eckert填料层压降通用关联图的关联与应用

对Eckert的通用关联图进行了回归 ,得到了分段的关联式 ,计算的最大误差为 18.5 % ,平均误差为 4.96 % ,可以满足工程设计计算的要求。该关联式用于真空精馏塔的计算 ,得到了满意的结果。同时还对三条泛点线进行了关联。     

粘度对规整填料层泛点影响的研究

研究了粘度对规整填料层泛点的影响 ,对文献上规整填料层泛点的关联式进行了改进 ,利用新关联式可由空气 水物系的泛点实验数据计算其他物系的泛点空塔气速 ,新关联方法与实验数据吻合较好 ,计算准确性优于文献公式     

Optimization of Dynamic Hardware Reconfigurations

Recent generations of Field Programmable Gate Arrays (FPGA) allow the dynamic reconfiguration of cells on the chip during run-time. For a given problem consisting of a set of tasks with computation requirements modeled by rectangles of cells, several optimization problems such as finding the array of minimal size to accomplish the tasks within a given time limit are considered. Existing approaches based on ILP formulations to solve these problems as multi-dimensional packing problems turn out not to be applicable for problem sizes of interest. Here, a breakthrough is achieved in solving these problems to optimality by using the new notion of packing classes. It allows a significant reduction of the search space such that problems of the above type may be solved exactly using a special branch-and-bound technique. We validate the usefulness of our method by providing computational results.     

A Mathematical Interval Model of a Combinatorial Problem of Packing of Color Rectangles

Based on the use of elements of interval geometry, a mathematical model of the problem of packing of color rectangles in a strip with prohibited zones is constructed. The model takes into account errors of initial data.     

Optimization of one-dimensional Bin Packing Problem with island parallel grouping genetic algorithms

The well-known one-dimensional Bin Packing Problem (BPP) of whose variants arise in many real life situations is a challenging NP-Hard combinatorial optimization problem. Metaheuristics are widely used optimization tools to find (near-) optimal solutions for solving large problem instances of BPP in reasonable running times. With this study, we propose a set of robust and scalable hybrid parallel algorithms that take advantage of parallel computation techniques, evolutionary grouping genetic metaheuristics, and bin-oriented heuristics to obtain solutions for large scale one-dimensional BPP instances. A total number of 1318 benchmark problems are examined with the proposed algorithms and it is shown that optimal solutions for 88.5% of these instances can be obtained with practical optimization times while solving the rest of the problems with no more than one extra bin. When the results are compared with the existing state-of-the-art heuristics, the developed parallel hybrid grouping genetic algorithms can be considered as one of the best one-dimensional BPP algorithms in terms of computation time and solution quality.     

CFD Study on the Local Mass Transfer Efficiency in the Gas Phase of Structured Packing

Visualization of local mass transfer coefficients over the dry surface of corrugated‐sheet structured packing is essential for optimizing the existing geometry of structured packing and for improving mass transfer efficiency to develop new structured packing. The local flow patterns between packing sheets and the gas‐phase mass transfer coefficient at each point over the surface are illustrated by employing a wall‐surface reaction model. Different turbulence models are utilized, i.e., a standard κ‐? model and three different low‐Re‐κ‐? models. The numerical calculation results with the Lam‐Bremhorst low‐Re‐κ‐? turbulence model is found to agree well with experimental data. There are three similar regions with enhanced mass transfer efficiency in each mass transfer unit cell of structured packing.