湿式除尘器综合运行参数的影响

通过测量不同初始液位b0和不同气流速度v时除尘器的节流液位差△h、全压损失R和除尘效率η等参数,对节流型自激式水幕除尘器的综合运行参数进行研究.研究结果表明:△h对气相阻力的增加有抑制作用,△h-v和R-v关系随b0的不同分别都呈直线和二次曲线关系;节流液位差通过改变含尘气流方向提高惯性碰撞几率,在提高除尘效率方面与速度v有同样重要的作用,除尘效率η随b0减小而增大,同一bo的η随v增大而增大;除尘器在风机叶轮旋转的不平衡惯性力激励下会发生共振.综合考虑共振频率、阻力和除尘效率3个因素,适宜的运行工况是bo=0～34 mm、v=9.22～13.68 m/s,此时除尘效率高达98.6％,全压损失为430～705 Pa.     

文丘里水膜除尘器改造应用研究

针对文丘里水膜除尘器运行中存在的压降过大和除尘效率过低等问题 ,采用文丘里 +旋流板 +喷淋 +折流除雾器的方法对原有除尘器进行改造 .改造工程应用表明 ,该方案的阻力和除尘效率在理论上的分析与实际应用相一致 ,在文丘里喉管气速 40m/s,液气比 0 .5L/m3 ,喷淋液气比为 1.5L/m3 时 ,除尘效率达到 95 %以上     

环缝气垫高效耐磨旋风除尘器的研究

为了经济、有效地提高旋风除尘器的耐磨性能和除尘效率，提出了在旋风除尘器内壁设置环缝套圈的增效防磨新方法，在理论上探讨了高速含尘气流对器壁的磨损机理和二次扬尘现象。在２ｔ燃煤锅炉上不同烟气流速下的对比实验表明，该新型旋风除尘器的除尘效率比普通旋风器提高５％，平均阻力系数比普通旋风除尘器降低１０％。     

文丘里水膜除尘器改造应用研究

针对文丘里水膜除尘器运行中存在的压降过大和除尘效率过低等问题，采用文丘里＋旋流板＋喷淋＋折流除雾器的方法对原有除尘器进行改造，改造工程应用表明，该方案的阻力和除尘效率在理论上的分析与实际应用相一致，在文丘里喉管气速40m/s，液气比0.5L/m^3，喷淋液气比为1.5L/m^3，除尘效率达到95％以上。     

一种自激式水幕除尘器改进试验

为进一步改进自激式水幕除尘器的除尘效果,提高除尘效率,对ZSL20自激式水幕除尘器的主要部件-节流板的长度做了改进试验。试验结果表明ZSL20自激式水幕除尘器在开度60 mm、70 mm、80 mm时,开度60 mm除尘效率最高,推论出适当地减小节流板开度可以提高除尘效。同时得出ZSL20自激式水幕除尘器对不同粉尘的除尘效率不同这一结论。     

聚丙烯酰胺复配物在自激式除尘器中的应用

为了提高自激式除尘器对呼吸性粉尘的去除效率,同时降低除尘能耗,将聚丙烯酰胺（PAM）、琥珀酸二辛酯磺酸钠（AOT）、硫酸钠和氢氧化钠或盐酸溶液进行复配,形成的PAM复配物用于自激式除尘器,对除尘情况进行了相关研究．从理论上分析了该复配物的除尘降阻机理,分别使用纯水、AOT溶液和PAM复配物溶液在自激式除尘器中进行了对比试验．结果表明,自激式除尘器使用PAM复配物溶液不但可以提高全尘特别是呼吸性粉尘的除尘效率,而且降低除尘器的阻力损失,减少能耗,在相同除尘效率和处理风量下,自激式除尘器使用PAM复配物溶液比使用纯水更经济、合理．     

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。     

利用高压静电技术改进旋风除尘器性能的研究

常规的旋风除尘器结构紧凑简单、投资省，适用于捕集锅炉排烟中粒径为5－10μm以上的灰粒。在旋风除尘器结构基础上附加高压静电场的作用，可进一步提高除尘效率，特别是提高微米和亚微米灰粒的捕集效率。通过建立实验系统和模型，进行了利用高压静电技术改进旋风除尘器性能的实验研究，并对影响除尘性能的参数，如除尘器进口风速、工作电压等进行了系统的探讨与分析，初步掌握了实验模型的最佳运行工况。     

二次扬尘对旋风器除尘效率影响分析与对策

讨论二次扬尘机理,建立了具有在紊流边界层中由于流速不等而导致粉尘下侧面压力不同所产生的二次扬尘影响下的旋风除尘器分级效率理论计算式。为削弱二次扬尘作用,提出在除尘器内壁设置环缝内衬的增效防磨新方法。 理论分析、半工业试验和工业应用的结果表明：环缝内衬旋风除尘器的除尘效率优于无环缝内衬旋风除尘器的除尘效率。     

除尘器多目标优化设计建模

建立除尘在优化数学模型是进行除尘器优化设计的基础,本文对旋风除尘器进行分析,建立了以除尘效率,压力损失为目标函数的旋风除尘器双目标优化设计数学模型。实例表明,对该模型求解,可得到使除尘器性能优良的结构参数。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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