SZWP240-7/95锅炉爆管原因及对策

1 问题的提出 SZWP型锅炉投运后。发生了多起后拱管爆管事故，严重影响了正常生产。本文对这一问题进行了分析、论证，并提出了相应对策，对该炉进行了改造。     

锅炉过热器爆管事故的原因及预防

针对永通球墨铸铁管有限责任公司发电车间SHS20-25/400-Q型锅炉,至99年投运半年后,接连不断的发生过热器爆管事故的情况,分析了爆管原因,并对症下药,进行了有效的预防和解决。可供同类型锅炉参考。     

7MW锅炉爆管事故分析及改造措施

对锅炉爆管事故进行分析，找出结垢、堵塞及爆管原因，提出解决方案。     

有机热载体炉爆管事故的原因和预防措施

爆管是有机热载体炉最常见发生的事故,无论是辐射受热面还是对流受热面管子,都会发生爆管事故。     

试论电厂锅炉过热器爆管原因分析及对策

电在人们的生活中发挥着重大的作用，人们的生活越来越离不开电了，而且用电的需求在不断地增大。所以如何高效地、安全发电成为了一个非常热门的话题。在整个电力系统中，发电是至关重要的。火力发电是一种重要的发电方式，然而在火力发电中存在着一些安全问题，比如说锅炉爆管事故。笔者针对锅炉过热器爆管问题作了简要的分析。     

隧道消防管道爆管产生的原因分析

本文以工程实例分析隧道消防管道内水压会出现不正常的反复现象;当达到临界点时,就会发生爆管,爆管的瞬间,气体和水的状态都从高压状态恢复到低压状态,分子之间释放出势能,转化为瞬时动能,这个瞬时动能形成的危害是非常大的。     

电厂锅炉设备中高温过热器爆管的原因以及防治措施

电厂锅炉设备作为影响机组安全运行以及电厂经济效益的重要环节,其突出的爆漏问题一直以来都是导致火电机组强迫停机的主要原因。为了从根本上结束电厂锅炉设备中高温过热器管事故的频发,文章首先从宏观检查、材质金相显微组织检验及力学性能分析几个方面分析了某高温过热管的爆管原因,最后又给出了相应的预防与处理措施。     

SZL15组装锅炉过热器爆管事故分析

针对SZL15—1．25／250-AⅡ锅炉短期使用后过热器管出现爆管事故,进行原因分析,对SZL15组装锅炉的过热器布置及相关设计作简要的探讨,并对该锅炉的过热器提出改进措施。     

引起锅炉爆管的原因分析

今年,我市某单位型号为DZL4-1．25-AⅡ的锅炉发生水冷壁管爆管事故,随即停炉进行检查：锅炉除3根水冷壁管发生鼓包破裂外,另有12根水冷壁管不同程度地鼓包变形和材质过烧变色现象,内部均被水垢堵塞,这些管子位于炉膛高温辐射区的两侧。检验中发现,这台锅炉锅简底部及集箱内均有大量脱落水垢和水渣堆积,发生爆管一侧的集箱局部被水渣堆满。     

火力发电厂高温过热器爆管分析

针对广州发电厂3号锅炉高温过热器发生爆管的情况，通过化学成分分析、力学性能试验和金相检验，认定原管子材质符合设计要求。在金相检验中，发现爆管处存在大量蠕变孔洞及裂纹，从而判定此次爆管是在高温和外弧切向最大拉应力作用下引起的蠕变脆性断裂造成的。     

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.     

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.     

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.     

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.     

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.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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.