余热锅炉爆管的检测和分析

本文以某余热电站为背景，针对锅炉运行中经常碰到的爆管问题，阐述了爆管造成的损失、爆管发生的现象，分析了爆管产生的原因，给出了利用计算机预防和预报爆管的方法。     

水冷壁过热器再热器爆管区别及运行调整

锅炉爆管严重威胁机组安全运行,叙述了水冷壁、过热器、再热器爆管的区别,为减少爆管的危害,针对实际情况研究了运行调整方式。     

关于余热炉中压蒸发器管屏爆管原因分析及对策

针对水泥余热炉中压蒸发器管屏爆管进行了分析研究,判断爆管产生的原因,并提出针对性改进措施,从而避免爆管的再次产生。     

大型多支线供水工程的爆管水力过渡过程分析

鉴于爆管是危及大型供水工程安全运行的严重事故工况,基于瞬变流基本理论,结合超压泄压阀的工作原理,建立了地下埋管爆管工况的水力过渡过程计算分析数学模型,并提出了供水系统中最危险的爆管位置的确定方法。实例应用结果表明,该模型能反映爆管过程中管道内压力和流量的瞬变过程,确定的爆管位置具有合理性。     

300MW机组锅炉再热器系统可靠性的探讨

针对300MW机组锅炉再热器频繁爆管问题,从爆管部位的宏观检查及金相分析入手,并根据热力试验的壁温分布,分析了产生爆管的原因,提出了解决问题的近期和长远办法,以便控制再热器频繁爆管的被动局面,提高再热器系统的可靠性。     

工业锅炉过热器爆管原因分析与处理措施

过热器爆管是较常发生的锅炉安全事故,通过对某工业锅炉过热器爆管现象进行分析,从不同角度分析了产生爆管的原因,进而提出预防与控制措施.     

兖矿南屯电力分公司某锅炉顶棚水冷壁爆管的分析与治理

循环流化床锅炉的爆管是影响电厂安全运行的最主要原因,给企业造成巨大的经济损失.本文详细介绍了兖矿南屯电力分公司某锅炉顶棚水冷壁的爆管情况,针对同一部位水冷壁频繁爆管做了分析,提出了相应治理方案,并在现场实际中改造应用,有效控制了爆管的问题.     

锅炉过热器对流管爆管原因及分析

介绍了某发电厂锅炉包墙过热器爆管情况。通过对其检验结果及运行数据进行分析,找出爆管原因,并且有针对性地提出防止爆管的措施。     

锅炉过热器爆管事故的原因分析

为预防锅炉过热器长期过热爆管事故,除保证设计、制造、安装质量外,运行管理水平异常重要。文章分析了引起爆管的原因,达到避免爆管,提高效益的目的。     

锅炉过热器对流管爆管原因及分析

介绍了某发电厂锅炉包墙过热器爆管情况。通过对其检验结果及运行数据进行分析,找出爆管原因,并且有针对性地提出防止爆管的措施。     

Unerroric of control of mutual compliance of the efficiency of hydrogen engines of unmanned vehicles in the conditions of mass production

The issues related to the reliability of hydrogen engines of unmanned vehicles and increasing the efficiency of using hydrogen as fuel when using the method of its production during the decomposition of hydrogen-containing molecules of liquid-phase organic compounds in a plasma discharge under the action of intense ultrasonic exposure are considered. Experiments have shown that as a result of decomposition in the acoustoplasma discharge of liquid hydrocarbons, solid-phase carbon-containing products are formed, chemical transformations occur in the liquid phase and hydrogen-containing combustible gas is formed. Hydrogen-containing gas can be used as fuel immediately after synthesis, i.e. it does not require separation, since in addition to hydrogen it contains only impurities of CO₂ and water vapor. The purpose of the study is to formalize the basic conditions for tightening the control of mutual compliance with the efficiency of hydrogen engines of the same series in the conditions of their mass production. Methods of mathematical statistics and hardware-software modeling were used in the study. The term “unerroric of quality mutual compliance control” is introduced to describe a set of hardware and software tools for such control. The principle of in-depth testing of the technical condition of such engines of one series is described in a multidimensional formulation of the quality control problem for three of their operating parameters at once. The conditions for increasing the mutual correspondence of the measured values of such parameters in the conditions of serial production of hydrogen engines are formalized.     

小型锅炉烟尘测试时锅炉出力的计算

锅炉烟尘测试时,必须对锅炉出力进行测试。但监测中,许多小型锅炉往往不具备相关的计量装置和仪表,为解决这一问题,文章提出了用烟气量和空气过剩系数来计算锅炉的出力的公式,在实际使用中,该方法简单易行,其结果和实测值具有很好的一致怀。     

生物质催化热裂解技术的研究进展

生物质催化裂解是生物质热化学转化的一种重要途径。综述了生物质催化热裂解技术使用的反应器、催化剂类型,以及催化热裂解过程中热裂解温度、吹扫气、升温速率、生物质原料等条件的影响,展望了生物质催化热裂解技术的发展趋势。     

中国煤炭地下气化技术的发展

本文综述了煤炭地下汽化技术的国内外发展现状,对我国“长通道、大断面”煤炭地下气化新工艺给予了技术经济评述,并提出了发展煤炭地下汽化技术的政策建议。     

促进城镇生活污水处理装置产业化

城镇生活污水处理装置是由农村户用沼气地发展演变而来，是一种小型、分散化处理污水的装置 ，是环境建设的需要。文章着重从我国环保政策及目标、生活污水造成的污染状况、急需整治的公共设施、生活污水净化装置的演变以及社会经济效益和环境效益等方面，阐述了其产业化的重要性。     

燃烧流化床气泡能量分布模型

应用瞬态谱分析方法对燃烧流化床声波信号进行了频谱分析,发现气泡能量分布呈Ｇａｍｍａ分布形式,在Ａｒｇｙｒｉｏｕｓ和Ｙｏｓｈｉｄａ等人提出的模型的基础上,发展了燃烧流化床气泡能量分布模型,并通过优化迭代对模型参数进行求解,在实验和理论的基础上得出了更加切合实际的燃烧流化床气泡能量分布模型     

Investigation of effect of variation of cycle parameters on thermodynamic performance of gas-steam combined cycle

The paper deals with second law thermodynamic analysis of a basic gas turbine based gas-steam combined cycle. The article investigates the effect of variation of cycle parameters on rational efficiency and component-wise non-dimensionalised exergy destruction of the plant. Component-wise inefficiencies of the combined cycle have been quantified with the objective to pin-point the major sources of exergy destruction. The parameter that affects cycle performance most is the TIT (turbine inlet temperature). TIT should be kept on the higher side, because at lower values, the exergy destruction is higher. The summation of total exergy destruction of all components in percentage terms is lower (44.88%) at TIT of 1800 K & r_p,c = 23, as compared to that at TIT = 1700 K. The sum total of rational efficiency of gas turbine and steam turbine is found to be higher (54.91%) at TIT = 1800 K & r_p,c = 23, as compared to that at TIT = 1700 K. Compressor pressure ratio also affects the exergy performance. The sum total of exergy destruction of all components of the combined cycle plant is lower (44.17%) at higher value of compressor pressure ratio (23)& TIT = 1700 K, as compared to that at compressor pressure ratio (16). Also exergy destruction is minimized with the adoption of multi-pressure-reheat steam generator configuration.     

Constructal optimization of the geometry of an array of micro-channels

This paper documents the geometric optimization of an array of circular and non-circular ducts. The optimization was carried out numerically using finite volume method. As optimal dimensions were independent of the array configuration, the numerical simulation was performed on a unit cell. Numerical optimization for circular, square and isosceles right triangle cross-sections of channels was performed. Based on the results of this investigation, some correlations were proposed to predict the optimal hydraulic diameter and dimensionless heat transfer per unit volume. In addition to examining the effect of pressure drop on these parameters, it was showed that among the different geometries of this study, square cross-section has the most efficiency for a given volume. The numerical results of the present study were compared with approximate results reported in the literature which a good agreement was observed.     

固体热辐射Yong性能分析

本文对漫灰均温物体在常物性条件下对外辐射传热的Ｙｏｎｇ值计算建立了数学模型。通过与物体内能Ｙｏｎｇ公式的数值计算比较,得出了辐射能量的Ｙｏｎｇ值不大于内能Ｙｏｎｇ值的结论。从初步的热射Ｙｏｎｇ值计算公式发现。Ｙｏｎｇ与物体表面辐射率有关。     

汽轮机零件防锈性能的改善

介绍了汽轮机零件的封存特点、防锈要求及防锈油性能对比试验的方法,通过对试验结果的对比分析,客观验证了各种防锈油的性能。试验表明,只有选择了合适的防锈油,才能保证汽轮机零件长期封存的质量。