电袋复合式除尘器在火力发电厂的应用及推广

本文介绍了电袋复合式除尘器的工作原理和技术特点,结合国内两家电厂静电除尘器的改造,探讨了电袋复合式除尘器的在火力发电厂的应用与推广。     

电袋复合式除尘技术

电袋复合式除尘器是吸取电除尘和袋除尘两种除尘机理的优点,舍去其缺点而开发的一种新型除尘设备。它具有长期、稳定的低排放（〈50mg/Nm3）、节能两大特点。现已投产的多台电袋复合式除尘器不管是用于水泥工业还是用于锅炉烟气净化,都证明其性能优于电除尘器或袋式除尘器。     

FE型电袋除尘器效率降低原因分析和对策

分析了林州热电公司350MW机组电袋除尘器除尘效率降低原因。通过严格控制入炉煤硫分,加强脱硝装置、电袋除尘器的管理和改进滤袋材质等措施使电袋除尘器除尘器效率和可靠性大幅度提高,烟尘排放浓度小于30 mg/Nm3,符合排放标准。     

电袋复合除尘器内部提升阀参数对流量分配的影响

该文针对电袋复合除尘器．采用CFD数值模拟技术,研究了电袋复合除尘器的提升阀直径和提升高度对其内部流量分配以及布袋区阻力的影响。湍流模型采用RNGk-ε双方程模型,布袋采用压降跳跃模型。采用前后袋室流量偏差来表征气流分配。根据计算结果,得出了袋室间的流量偏差与提升阀高度、提升阀直径的关系,从而为电袋复合除尘器的结构优化设计提供了科学依据。     

电袋除尘器喷吹阀受腐蚀状态研究

我们电厂2006年安装FE型电袋复合式除尘器,主要通过滤袋进行除尘,因此滤袋的工作寿命关系到除尘器的运行状态和成本,而滤袋的使用寿命又与脉冲喷吹阀有着密切关系,如吹灰不及时,或吹灰不彻底都会造成滤袋积灰,温度升高而损坏滤袋。由此可见脉冲喷吹阀的正常运行是保证电袋复合除尘器稳定,可靠运行的必要条件。     

生物质烟气除尘技术实验研究

生物质能是重要的零碳可再生能源,烟气除尘技术是影响其发展的重要因素。基于耦合电袋除尘器实验平台,研究了不同电压下耦合电袋除尘器在生物质飞灰脱除领域中除尘性能、运行性能和能耗变化,对比了最佳实验电压下不同结构除尘器的性能和滤料类型对耦合电袋除尘器性能的影响。结果表明：施加电压增大,耦合电袋除尘器对大粒径生物质飞灰脱除效率明显提高,出口总尘浓度降低,最终压降降低,由-10 kV对应的920 Pa降至-20 kV时的317 Pa,减小了65.54%;起晕电流增大,总能耗先减后增,综合性能提升。最佳实验电压下,耦合电袋除尘器综合性能较前电后袋式除尘器优越,但能耗较高;电袋除尘器性能优于布袋除尘器。相较燃煤飞灰,耦合电袋除尘器对生物质飞灰脱除效率较高,出口浓度较低,能耗较高,综合性能较低。     

复合式电旋风除尘器的模化理论与冷态实验研究

介绍了复合式电旋风除尘器特征结构和基本原理.根据含尘气流在电旋风除尘器中的受力情况,推导出其冷态模化的主要相似准则,提出静电离心分离相似准则Sel,明确了该种除尘器的近似模化条件.利用大量影响除尘性能的实验数据,通过多元线性回归分析方法,得出了复合式电旋风除尘器除尘总效率和总阻力系数的计算式.     

电袋复合除尘器控制气路设计

该文运用气路逻辑和设计原理,根据电袋复合除尘器旁路烟道、净气通道、清灰系统结构与使用功能,研究一种新型电袋复合除尘器控制气路,详细阐述控制气路设计主要原理、基本回路、气压传动主要部件选择和计算过程,确定电袋复合除尘器控制气路的基本功能和组成结构,探讨电袋复合除尘器控制气路正确配置和选用气压传动主要部件的方法,通过控制气路设计达到电袋复合除尘器旁路烟道与净气通道气动切换自动控制、清灰系统自动清灰目的。     

电袋除尘器安装质量对排放效率的影响分析

电袋除尘器由于体积庞大、重量重而无法整体运输,所以产品只能以零部件出厂,运抵安装现场后再组装成整机.电袋除尘器的收尘效果和设计、煤质、烟气量、运行操作、安装质量等要素相关,本文针对成熟技术设计并取得大量成功使用的电袋除尘器,就气流分布板、阴阳极间距、旁路烟道、清灰系统几方面安装质量对排放效率影响作系统分析,以总结经验改善设计,减少因安装因素影响排放效率,不因设计而使安装工艺复杂.因此,研究和开发适合普通素质人员安装的新型电袋除尘设备不仅是电力生产的需要,也是国家对环境保护的要求,本课题正是针对这种情况提出的.     

复合式电晕极除法器的研制

介绍了复合式电晕极的性能和复合式电晕极除尘器的主体结构，测试了复合式电晕极除尘器模拟运行的有关参数。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with