循环流化床烟气悬浮脱硫装置脱硫机理研究

本文在循环流化床烟气悬浮脱硫中试试验装置上，进行了烟气脱硫机理研究。本文机理适用于脱硫剂浆液雾化、大量脱硫灰循环情况下的烟气脱硫。中试试验中，以Ca（OH）2、Cao、Caco3为脱硫剂，在Ca/S＝1．0－2．5，AAST＝2－20℃的条件下测试了其脱硫性能及干燥性能。试验表明，Ca（oH）2、Cao、Caco3的脱硫性能依次降低，其脱硫效率分别相差约5％、35％。三种脱硫剂的脱硫效率随Ca／S的增加以及AAST的减小而增加。浆液滴的干燥时间为1．0－2．0秒。二氧化硫的脱除主要是在液滴干燥之前完成的。     

变速循环化床烟气脱硫实验研究

用干消化石灰粉末作脱硫剂在变速循环流化床上进行了脱硫试验研究，在Ｃａ／Ｓ比为１．１并喷入适量水情况，脱硫效率可达８５％以上。     

NH3对Cu/AC脱硫剂再生行为的研究

对Cu/AC脱硫剂在NH3气氛中的再生情况进行了研究，结果表明：Cu/AC经NH3再生后脱硫活性可得到完全恢复，其原因是NH3在脱硫剂表面的吸附使得脱硫剂表面的碱性增强，二次脱硫活性增高。     

浅议湿法栲胶脱硫设计

以某厂12万t/a合成氨脱硫工段的设计情况为例，介绍了湿法栲胶脱硫原理，并对半水煤气脱硫和变换气脱硫原理、设备选型、脱硫剂的再生产及回收的优化设计进行了阐述。     

烟气脱硫剂的研究现状与进展

随着二氧化硫对环境的污染越来越严重，国家环保局对烟气二氧化硫排放控制严格，烟气脱硫显得日益重要。对七类烟气脱硫剂的脱硫机理及应用进行了综述，并指出了烟气脱硫剂今后的研究重点。     

蒸汽活化石灰-飞灰的烟气脱硫实验研究

循环应用飞灰作为干法和半干法脱硫的重要添加剂，目前研究的重点主要是对作为脱硫剂的石灰／飞灰的活化．通过对半干法烟气脱硫机理的研究，设计了一套蒸汽输送、实验室脱硫系统，研究石灰／飞灰在140℃以下的低温蒸汽条件下性质的变化．采用蒸汽活化后的石灰／飞灰作为脱硫剂，对石灰／飞灰在水蒸气输送半干法脱硫工艺中对脱硫效率的影响进行了研究和分析．试验结果表明，石灰在蒸汽条件下其中的CaO转化为Ca（OH）2，同时，脱硫剂的比表面积由7．8688m^2／g增加到10．0715m^2／g．脱硫剂中加入循环应用飞灰可以明显地提高脱硫效率，在石灰和飞灰加入量的重量比为1：8时，脱硫效率达到86．9％．SO2的去除率比不加飞灰的脱硫效率提高了12．8％．研究表明，通过蒸汽对石灰和循环应用脱硫剂活化可明显提高脱硫效率．     

变速循环流化床烟气脱硫实验研究

用干消化石灰粉末作脱硫剂在变速循环流化床上进行了脱硫试验研究，在Ｃａ／Ｓ比为１．１并喷入适量水的情况下，脱硫效率可达８５％以上．     

预还原对氧化铈高温煤气脱硫剂的影响

采用工业硝酸铈Ce(NO3)3.6H2O为原料制取CeO2,用干混法制备CeO2高温煤气脱硫剂。在固定床反应器中考察不同还原温度、不同还原时间对脱硫剂脱硫效率的影响。结果表明:脱硫剂预还原时间越长,还原温度越高,脱硫剂的脱硫效率越高;氧化铈脱硫剂在硫化样品中出现了新的物相Ce4.667(SiO4)O,铈的价态约为 3。     

ZnO型复合脱硫剂的制备研究

用共沉淀法制备纳米ZnO型复合金属氧化物脱硫剂，此脱硫剂在中温、无氧条件下脱硫，硫容可达32．5％．同时，进行了锌、铜、锰氧化物的一元及二元组合的脱硫反应．实验证明：在相同的反应条件下，同时掺杂CuO和MnO2的ZnO脱硫剂的脱硫能力最佳，且降低了单——ZnO脱硫剂的硫化温度，少量的La2O3和CeO2作用于脱硫剂中，增加了脱硫剂的反应活性，提高了脱硫能力．并采用了DTA和XRD技术分析金属氧化物分解温度及脱硫剂组成结构。     

铁水炉外脱硫影响因素研究

研究脱硫剂组成和加入量、脱硫反应时间、铁水初始硫含量等对铁水炉外脱硫率的影响规律,据此提出了合适的脱硫剂组成以及铁水炉外脱硫操作要点。     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.