锅炉节能蓄热器的研究

该文介绍了适合负荷波动较大时应用的锅炉蓄热器工作原理、设计和校核方法。并对１０ｔ／ｈ链条炉设计了变压蓄热器，使该炉能满足短期最高负荷１４．５ｔ／ｈ和最低负荷７ｔ／ｈ的同时，保证锅炉在设计工况附近运行。锅炉热效率由加装蓄热器前的６１．７５％提高到７６％，年节约标准煤２８４３．８ｔ能取得显著的节能效果．     

用稳燃腔煤粉燃烧器改燃烟煤为燃无烟煤锅炉

针对一台７５ｔ／ｈ锅炉，利用稳燃腔煤粉燃烧器，并实施其他相关改造，成功地将原设计一直燃用烟煤改燃无烟煤，并取得了改造后的锅炉燃用无烟煤６０％负荷下不抽油稳燃的良好效果。     

35t／h煤粉锅炉改循环流化床锅炉的研究

介绍了某公司的一台３５ｔ／ｈ煤粉锅炉改循环流化床锅炉的设计与运行,结果表明,改造后的循环流化床锅炉不仅能达到４０ｔ／ｈ的额定蒸发量,而且操作性能稳定,煤种适应性广、负荷调节范围大,达到了节能降耗和降低生产成本的目的。     

AZD20t／h抛煤机锅炉的改造设计

本文主要介绍一种ＡＺＤ２０ｔ／ｈ抛煤机锅炉的改造方案，通过对炉排的改造、炉膛结构的改变，以及采取炉内飞灰分离措施，改进二次风系统，使该型锅炉达到更新换代之目的，既解决了冒黑烟问题，又提高了锅炉热效率。     

“75t／h热电站煤粉锅炉多变量微机控制系统”通过专家鉴定

“７５ｔ／ｈ热电站煤粉锅炉多变量微机控制系统”通过专家鉴定由我校自动化系与淮化集团有限公司合作完成的安徽省科委重点研究项目“７５ｔ／ｈ热电站煤粉锅炉多变量微机控制系统”于１９９６年１０月２８日通过专家鉴定。国内外目前电站煤粉锅炉主要采用仪表控制，少数...     

60t／h中试增压流化床锅炉蒸汽负荷调节特性

增压流化床锅炉主要有两种负荷调节方法：一是改变密相床高度，二是改变床温，本文以即将在徐州安装搬运的６０ｔ／ｈ增压流化床锅炉为对象，通过计算对上述两种调节手段进行了比较。结果表明，只改变床温，负荷的调节范围很有限（７９．３％～１００％）；而利用改变密相床高的方法，可在较大范围内（５５．５％～１００％）调节锅炉负荷，若同时调节床高和床温则可获得更大的负荷调节范围，且过热器出口的蒸汽温度变化幅度也很小。     

协调PH-磷酸盐控制在锅炉炉内水处理中的应用

１问题的提出及解决方案的确定陕西兴化集团有限责任公司使用的锅炉为两台中压汽包燃煤锅炉（型号：ＳＧ３５／３９－Ｍ４３９，压力３．８２Ｍｐａ，蒸发量为３５ｔ／ｈ），其给水原采用软化水，控制指标为：Ｈｔ＜０．０１５ｍｍｏｌ／Ｌ，Ａｔ＝０．５～１．０ｍｍｏｌ／ＬＰＨ＞７。炉内采用加磷酸三钠处理，控制指标锅炉内：Ａｔ＜１２．５ｍｍｏｌ／Ｌ，ＰＯ４３－＝５～１５ｍｇ／Ｌ，ＰＨ＜１０，相对碱度（ＮａＯＨ／溶解固形物）＜０．２。公司一期软水系统改造完成后，锅炉给水采用一级除盐水，其各项指标如表１。表１一级除盐水水质指标测定项目ＨｔＡｔＮａ＋Ｃｌ－ＳｉＯ３２－ＰＨ电导率μｍｏｌ／ｌμｍｏｌ／ｌμｇ／ｌμｇ／ｌμｇ／ｌμｓ／ｃｍ测量数据１．７７５４７４０６７．６８０．８由于锅炉给水已采用了除盐水，炉内处理还采用过去的方法——磷酸三钠处理，即不合理也不经济，这是因为：①给水的碱度已经下降到０．１ｍｍｏｌ／Ｌ以下：炉水碱度如要控制在原来的水平，必然要大量投加Ｎａ３ＰＯ４，这既不经济，也很难保证相对碱度＜０．２。②除盐水中盐离子含量的大量减少，蒸汽已不可能携带大量的杂质，而大量投加的磷酸三钠将成为影响蒸汽品质的主要杂质来源。③给水硬度...     

喷射鼓泡烟气脱硫（Ⅱ）

该文介绍了喷射鼓泡烟气脱硫在工业锅炉上应用的情况。喷射鼓泡烟气脱硫工艺石灰浆液配制系统、脱硫除尘反应系统和产物处理系统等组成。喷射鼓泡反应器（ＪＢＲ）集脱硫除尘于一体，具有气体压降小、液气比高，能达到９０％以脱硫率和９５％以上的除法率等特点。ＪＢＲ硫的设备投资与运行费用低，１ｔ／ｈ锅炉的设备投资约为１．２５万元，去除１ｔＳＯ２的费用约１２５元。ＪＢＲ脱硫系统操作容易而稳定，没有结垢问题，表现出推广     

Banach空间微分方程初值问题弱解的一个存在性定理

在弱耗散型条件ｌｉｍ／ｈ→０＾－１／ｈ［｜ψ（ｘ－ｙ＋ｈ（ｆ（ｔ，ｘ）－ｆ（ｔ，ｙ）））｜－ψ（ｘ－ｙ）｜］≤ｇ（ｔ，｜ψ（ｘ－ｙ）｜）下给出了Ｂａｎａｃｈ空间常微分方程初值问题弱解的一个存在性定理。     

下排气中温分离器型循环流化床锅炉的研究与设计

根据我国循环流化床锅炉燃煤宽筛分的特点，从循环倍率和密相区吸热量、燃烧分额、出口温度及分离效率等关系深入分析了密相区热量平衡，对中温下排气分离器内三维速度场进行分析研究，并以４１０ｔ／ｈ循环流化床锅炉方案设计为例，提出了宽筛分，中、低循环倍率，中温下排气分离器，п型布置的循环流化床的构思。     

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.