常州市城市生活垃圾热值测定的研究

利用物理化学的方法——燃烧热测定方法,研究不同种类生活垃圾的热值,得出以下观点：适于焚烧的生活垃圾应该是高热值生活垃圾,这种观点其实是片面的,垃圾是＂废物＂不是＂燃料＂,其实不然,通过研究发现垃圾中的热值可以得到充分利用。     

上海城市生活垃圾的组成及热值分析

对上海城市生活垃圾的组成、燃烧特性、元素分析及热值等试验结果的分析表明:粒径为40～120 mm的垃圾含量最大,试验的平均质量分数约为43.5%;其次是粒径为8～40 mm的垃圾,平均质量分数约为34.9%;粒径大于120 mm的约为15.7%,小于8 mm的约为5.8%.有机物质量分数高,约占65%,且含水率高,热值低,不适合焚烧;可燃物(塑料、纸类、纺织物、包装物、木块)质量分数约为30%,含水率较低,热值高,适合焚烧.由此说明,上海城市生活垃圾的处理不宜采用单一的方式,必须综合处理以利于垃圾资源化.     

350t/d垃圾焚烧炉的结构优化

鉴于国内生活垃圾热值的多样性,直接采用国外引进的焚烧炉会存在燃料热值不适应等问题.对广东某350 t/d的炉排式垃圾焚烧炉进行适应性改造,采用床层计算软件FLIC和计算流体力学CFD软件Fluent对不同结构的垃圾焚烧炉内的燃烧情况进行数值模拟,预测前墙折焰角与后拱U形折角对炉膛的温度场、速度场、烟气组分的分布特征与燃...     

呼和浩特市城市生活垃圾组成及特性分析

对呼和浩特市城市生活垃圾的物理和热解特性的研究表明:呼和浩特市城市生活垃圾组成以厨余为主,含量为32.00%,基本都属于生物质有机物,可进行生物堆制或发酵处理.生活垃圾中塑料和纸张有较大比例,分别占9.2和6.5%,可燃有机物质约占75%,垃圾热值达到5242kJ/kg,可用于热解或焚烧发电.可回收组份也占有较大比例.     

重庆市主城区生活垃圾理化性质分析及处理技术

目前，重庆市主城区生活垃圾以填埋方式为主，二次污染严重，采用“三化”方式处理生活垃圾势在必行。通过对主城区垃圾不同地点进行的生活垃圾取样，分析了垃圾的理化性质。实验结果表明：重庆市主城区生活垃圾组分以厨余垃圾为主，易燃烧的塑料、纸张含量较低；含水率高，可燃分和灰分较低，垃圾的热值基本满足燃烧要求；垃圾元素中C、H、O含量较高，并含有一定N、S和Cl。高含量的厨余垃圾，是影响垃圾焚烧质量的主要因素。若采取有效的措施，提高垃圾的热值，可采用焚烧方式处理部分生活垃圾。     

循环流化床纯烧城市生活垃圾的技术实现与工程应用

通过建模理论分析,得到了低位热值为3238.9kJ/kg的生活垃圾在循环流化床锅炉焚烧的理论数据。采用公司发明专利技术及其他相关技术工艺,实现了循环流化床纯烧城市生活垃圾,并在垃圾焚烧处理厂得到成功应用。     

提高生活垃圾热值的几种途径

本文结合我国生活垃圾热值普遍存在混合收集,垃圾热值偏低、含水率较高的特点,对影响生活垃圾热值的因素做了分析,总结了提高生活垃圾热值的两类方法。     

城市生活垃圾焚烧处理探究

随着我国城市化进程的不断加快,城市中产生的生活垃圾数量不断上升,处理好城市生活垃圾对环境保护有重要的作用。本文分析了垃圾焚烧技术的优点,阐述了几种焚烧炉的运作工艺以及焚烧烟气处理方法。     

木竹燃料锅炉烟气污染物排放量的分析研究

通过对木竹燃料及锅炉特性的研究,测定了有代表性企业木、竹燃料热值和含硫量,采用物料衡算法较为合理地预算了木竹燃料锅炉烟气污染物的排放量,可为山区排污费核定征收提供依据.     

二恶英零排放生活垃圾气化熔融技术

焚烧处理垃圾所带来的二恶英污染已广泛引起国内外环境专家的关注。介绍了一种新型的处理城市生活垃圾的焚烧技术——城市生活垃圾气化熔融焚烧技术。经处理．原垃圾中99．8％以上的二恶英可被分解，烟气中二恶英的排放量〈0．01ng-TEQ／m^3，熔融渣中二恶英的排放量〈0．003ng-TEQ／g。从而抑制了二恶英的排放，做到了从源头上控制二恶英的产生。     

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     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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