冷凝水回收再利用

现代化技术设备的不断更新,纺织厂空调耗能比重逐年上升,因此认真地研究和解空调节能问题是摆在我们面前的一项刻不容缓的重要任务,而目前许多大型企业所配置的空调系统大多是集中式的全空气处理系统,夏季的降温、去湿处理过程主要靠表冷器来完成高温、高湿的空气与表冷器进行热湿交换后,大量的冷凝水被析出,而这些冷凝水的温度又较低,把这些温度较低的冷凝水回收起来再利用,对空调夏季的节能将会有重要的作用。本文介绍了集中式全空气处理系统空调目前产生冷凝水的现状,冷凝水量的计算方法,及冷凝水的回收再利用。     

利用余热改造区域采暖系统

工业余热是指各种生产工艺过程的热损失,我厂的工业余热主要有：从各种化工设备,工业炉中排出的可燃气体;高温烟气及熔渣;从工业炉或其它设备排出的冷却水;工业设备中蒸发出的蒸汽或动力设备中排出的乏汽。2140冷凝水站改造前情况140冷凝水站是加收全厂冷凝水的总站。总站回收能力可达170t／h。目前实际冷凝水回收,夏季为40－50t／h,冬季可达60－80t／h,冷凝水回收温度一般为85－95℃。可供回收热量为14X10KW。改造前冷凝水由于含油,不能被电厂回收利用,冷凝水被送到11单元,12单元加热原油,又因为冷凝水的量过大,一部分冷凝…     

浅谈粒碱蒸发冷凝水回收利用

阐述了天辰化工有限公司粒碱系统蒸发冷凝水的回收再利用工艺改造内容,结合现场实际情况对剩余蒸发冷凝水进行处理,实现了粒碱系统蒸汽冷凝水的回收再利用,解决了水不能回收和处理的难题,同时为企业节约了水资源,降低了运行成本。     

固碱生产过程中二次蒸汽冷凝水的回收利用

受新疆地域的影响和液体产品运输工具的限制,液碱产品运输到内地销售成本过高,不利于企业的生产成本控制。天能化工有限责任公司将生产出来的32%液碱蒸发干燥成98%固碱产品,便于运输。在液碱蒸发过程中产生大量的二次蒸汽冷凝水,显碱性且温度高。为了实现二次蒸汽冷凝水的回收利用、环保、节能减排,天能化工有限公司通过工艺技术改造实现了二次蒸汽冷凝水的零排放,解决了含碱水化盐富余、生产直排给企业水处理的困难,节约了水资源,降低了企业的生产成本。     

无动力回收冷凝水提高分体空调机性能的实验

家用空调的使用越来越广泛,在湿热环境,空调产生的冷凝水量相当可观.本文利用冷凝水含有可回收冷量的特点,将其用于降低室外机进风温度来提高室外机的散热性能;通过对比分析冷凝水冷却室外机进风前后的空调机性能,提出一种用冷凝水浸湿的湿帘冷却室外机进风的方案,并设计了一套无动力输入的集冷凝水回收与利用于一体的节能系统,并做了初步实验验证,结果显示在室外温度升高0.02%时,室外机进风湿帘可以小幅度拓展室外机工作温度范围,还有空调COP提高了2.6%.既解决了现实中冷凝水的随意排放造成的环境问题,又提高了空调机的空调效果,是一种很好的节能环保技术.     

商场冷凝水耦合光伏/光热系统的应用分析

太阳能光伏光热(solar photovoltaic-thermal, PV/T)技术将光伏和光热结合,可实现产电效率的提高和低品位热源的综合利用。基于商场空调冷凝水的实时回收量,本文研究建立了冷凝水水冷式PV/T系统,研究了该系统的性能和环境效益。在确定商场的空调冷凝水的逐时水量的基础上,将冷凝水水冷式PV/T系统与单一光伏(photovoltaic, PV)系统的性能进行对比分析。结果表明,冷凝水水冷式PV/T系统通过收集制冷季商场内空调产生的大量冷凝水作为冷却介质,降低了光伏电池板的温度,典型日的光伏效率提升了17.78%,在整个制冷季,冷凝水水冷式PV/T系统较单一的PV系统净发电量增加了365.55 kW·h,具有6 938.27 kW·h的节能效益,可减排6.439 t二氧化碳。     

粒碱系统蒸汽冷凝水回收再利用的工艺改造

介绍了天辰化工有限公司粒碱系统的蒸汽冷凝水的回收再利用的工艺改造内容,通过改造,实现了粒碱系统蒸汽冷凝水的回收再利用,解决了水不能回收和处理水中的难题,同时为企业节约了水资源,降低了运行成本。     

有固相析出的多效两段蒸发 系统模型与过程模拟

建立了带有冷凝水闪蒸的有固相析出的多效两段蒸发系统的常规设计数学模型,模型将系统的相平衡关系用回归式表达,使模型可以用计算机编程求解,避免了手工计算结合查相图的烦琐的计算过程;利用矩阵方程具有结构清晰和高度模块化的特点,将系统的物料衡算和热量衡算方程组写成矩阵方程的形式,只要保留或舍弃矩阵方程中的相关块矩阵,模型就能代表没有冷凝水闪蒸或没有固相析出的多效两段蒸发系统常规设计模型;采用迭代法结合矩阵法来求解模型,算例表明,冷凝水闪蒸对多效两段蒸发系统是有效的节能措施,算法收敛速度快、收敛稳定性好。     

蒸汽冷凝水热量回收系统的设计计算

阐述二次蒸汽冷凝水热量回收系统的设计计算，建立冷凝汽液相转换的计算方程、研究喷射器在冷凝装置和冷凝水回收泵之间所起的耦合作用，建立喷射器的流体连续性方程、热平衡方程和效率计算的公式，指出克服冷凝后过热水再转变为汽相的技术关键；还导出流体在循环回路及经过泵加压后的能量方程，最后给出应用实例的示意图并讨论回收系统的设计计算应解决的技术性问题     

解析蒸汽冷凝水的回收利用

介绍了天辰化工有限公司始终将节能环保放在首位,通过不断的技术改造将解析蒸汽冷凝水回收利用,解决了解析蒸汽冷凝水不能回收利用的难题,减少废水排放节约成本获得可观的经济效益。     

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