燃气轮机联合循环启动过程排烟NO-NO2转化研究

本文针对部分燃气轮机联合循环机组在启动和低负荷运行时冒黄烟的现象,通过实验和理论计算方法研究温度、烟气成分等因素对燃机排烟中NO向NO_2转化的影响。研究表明,在燃气轮机透平排气的典型温度(500~650℃)和组分条件下,排气中的CO含量高会导致NO在2 s内快速的转化为NO_2,即在启动或低负荷条件下燃烧不完全是燃机排气产生黄烟的重要原因之一。     

DLN2. 6 +排气温度监测及保护功能分析

燃气轮机是以高温燃气驱动透平做功的高效热力发动机。其燃料燃烧一旦失稳,将产生剧烈的燃烧 脉动,引发燃气轮机燃烧部 动,严重 造成燃烧部件损坏。排气温度作为燃气轮机运行主要监测参 ,所现 性 作为 燃气轮机燃料燃烧稳定与否的重要判断依据。通过结合燃气轮机实 运行案例 GE公司 低氮燃烧系统DLN 2. 6+排气温度及 的基本功能, 气温 度监测方法、排气热 故障诊断策略、排气温度分散度算法以及保护功能。     

2014GTW简单循环技术规范

正据《Gas Turbine World》2014年1-2月刊发布了2014年度燃气轮机简单循环技术规范。介绍了世界各国各燃机制造公司的各型燃气轮机产品,叙述了各型燃气轮机的设计性能及规范,包括首台可用年份、ISO条件下基本负荷额定功率、热耗率、效率、压气机压比、质量流量、涡轮转速、排气温度、以及燃气轮机的重量和尺寸。在注解一栏中还对这些燃机是否使用双燃料燃烧器、标准燃烧室、干式低NOx燃烧室、干式低排放、     

浅谈三菱M701F4型燃气轮机几起BPT负偏差大的处理

对三菱M701F4型燃气轮机的排气检测包括温度检测、压力检测与可燃气体含量检测进行了介绍。其中着重介绍了燃气轮机的排气温度检测,它是通过26个热电偶来实现的。其中20个热电偶用于检测透平叶片通道温度(BPT),6个热电偶用于检测透平排气系统下游排气烟道的排气温度。结合某公司机组自投运以来出现的几次BPT负偏差偏大等的异常情况,详细叙述了该类故障的分析判断过程和解决方法,并从系统工艺流程和设备选型改进上,给出了预防此类故障的建议和措施。     

SGT-750是一型经过充分试验并得到证实的燃气轮机

正据《DioeselGas Turbine Worldwide》2014年12月刊报道,前两台工业用Siemens SGT-750工业燃气轮机的安装和交工试运转已被完成。Siemens SGT-750是一型适用于电力生产和驱动机械的38 MW双轴燃气轮机。该燃机是2012年推出的,压比为24,压气机排气温度为490℃,涡轮排气温度为462℃,简单循环效率超过40%。该燃机配备8     

PG9171E型燃机进气加热对联合循环性能影响分析

以天津某PG9171E型燃机电厂为研究对象,根据系统热平衡方程为理论依据建立数学模型。利用Aspen Plus软件建立电厂的物理模型,分析燃机进气加热温度对联合循环中的燃气轮机、余热锅炉、汽轮机主要参数的影响。结果表明,随着进气温度的提升,燃机功率和联合循环系统总功率降低;燃机排气温度和余热锅炉排烟温度升高;汽轮机的功率及效率几乎不变。本研究的结论可以为燃气-蒸汽联合循环的设计提供理论参考。     

生物质气为燃料微型燃气轮机运行的仿真模拟分析

将某公司的微型燃机作为研究对象,使用仿真模拟方法对将生物质气作为燃料研究燃料微型燃气轮机运行的可行性。通过仿真模拟表示,此燃机不能够燃烧低热值棉柴气和稻草气,所以也就无法同时有效满足透平入口温度、压气机喘振裕度的需求。燃用高热值沼气和木片气的时候,微型燃机能够安全地运行。基于此,对微型燃机无法燃烧低热值燃料的问题提出了压气机改进的方案,此方案能够有效提高低热值燃料燃用时压气机透平入口及喘振裕度,使微型燃气轮机能够安全、有效地运行。     

简讯

监测燃气轮机的燃烧温度,传统采用热电偶,其缺点是受仪表寿命、精度和响应时间的限制,且热电偶对燃气流也有干扰故机组不能在最优工作点运行。 美国Ametek、Enivrga和West Latayetle三公司联     

燃气轮机排气扩散器的设计特点

燃气轮机排气扩散器的国产化设计、性能分析等关系到整个燃机运行的性能,以及后续余热锅炉的安全运行。因此,除系统了解燃机的特有要求外,还需对其他各类燃机也有一个全面的了解,并结合具体情况对功能、布置、结构、应力等做出较为全面的分析,从而找到设计要点,为今后其他类型的燃气轮机排气扩散器的设计提供借鉴。     

南宁燃机电厂与南京燃气轮机研究所正式签定机组大修合同

南宁燃机电厂与南京燃气轮机研究所正式签定机组大修合同南宁燃机电厂经过多方洽谈和比较，决定选择南京燃气轮机研究所承担其ＰＧ６５３１燃气轮机发电机组的大修任务，双方于七月中旬正式签约。检修范围包括从压气机进口过滤器室至发电机输出端的燃气轮机本体、进排气道...     

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。     

MgO膨胀剂细度对MgO水化和水泥浆体膨胀的影响

基于《水工混凝土掺用氧化镁技术规范》中的Ⅰ型氧化镁（MgO）,研究了该型MgO膨胀剂（MEA）细度对掺粉煤灰水泥浆体膨胀性能的影响。即采用X射线衍射分析(XRD)及同步热分析（TG DSC）分析了掺MEA水泥浆体中MgO的水化性。结果表明,养护温度相同时,MEA的细度对水泥浆体内MEA中MgO的水化和水泥浆体的膨胀无显著影响,产生的膨胀均能补偿水泥浆体的收缩;MEA的细度可从试验设计采用的45 μm筛筛余15%左右增加到30%左右,这将有利于MEA生产企业的节能降耗。     

Heat of vaporization of mixtures

General expressions for the heat of vaporization of mixtures at constant pressure; at constant temperature; and at constant pressure, temperature, and composition are proposed. The last one is related to the liquid-vapor interface where steady vaporization or condensation is taking place. Numerical examples by the proposed expressions are shown for binary mixtures of HCFC22(R22) and (HCFC123(R123) © 1997 Scripta Technica, Inc. Heat Trans Jpn Res, 25(1): 12–24, 1996     

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。     

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     

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。     

Review of theory of distortion and disintegration of liquid streams

Linear and nonlinear analyses of the instabilities and distortion of liquid streams injected into a gaseous media are discussed. The various fundamental mechanisms and the predictive capabilities for the distortions are emphasized. Round jets, planar sheets, annular sheets, and conical sheets are discussed in detail. The balance between capillary and inertial forces is primarily examined. The method for simplifying the analyses in the case of thin liquid sheets is discussed. The capabilities for representing the droplet size distribution that follows the stream disintegration are outlined.     

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。     

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.