燃气轮机爆炸事故分析

本文就中原油田第三气体处理厂一台ＭＳ１００２型燃气轮机发生的一起排气烟道爆炸事故及中原某化肥厂一台ＭＳ３００２型燃气轮机发生的一起燃烧室爆炸事故进行故障分析。供参考借鉴．     

重型燃气轮机先进低NOx燃烧技术分析

对重型燃气轮机领域中的低NOx燃烧技术进行介绍与说明,首先简要论述了重型燃气轮机燃烧室中氮氧化物的产生机理及抑制方法,其次,介绍了贫预混多喷嘴分级燃烧技术、富油/烽熄/贫油燃烧技术和贫预混低旋流燃烧技术等7种可用于重型燃气轮机燃烧室的先进低NOx燃烧技术,并详细论述了这7种低NOx燃烧技术的作用原理及应用进展,可为国内重型燃气轮机低污染燃烧室的设计与研制提供技术参考.     

煤气化多联产系统中燃气轮机的改造与运行过程分析

本文简述了煤气化多联产系统中燃用中低热值合成气燃气轮机燃烧室的改造方法,详细分析了改造后机组的启动及油切气两个关键过程。     

三菱M701F燃气轮机燃烧调整分析

燃气轮机燃烧调整是我国引进重型燃气轮机的关键技术和重要难题之一.本文详细分析了三菱M701F燃气轮机燃料系统结构及基本的控制原理、燃烧调整的目的、监测手段及调整的方法和过程,根据燃烧不稳定产生的原因提出改进方法.分析了燃烧室压力波动监视系统CPFM的功能和构成,以及高级燃烧室压力波动监视系统Advanced CPFM在机组运行中的作用,可以进一步提高技术人员掌握燃气轮机燃烧调整技术的能力.     

生物质气微型燃气轮机燃烧室的数值模拟

将生物质气应用在为天然气设计的微型燃气轮机中时,由于其热值较低以及可燃成份的不同,会给燃烧室的温度场、速度场以及燃烧特性造成影响.对30 kW级微型燃气轮机的燃烧室进行了初步的设计,并在此基础上采用Fluent软件对燃烧室燃烧甲烷气和生物质气进行了数值模拟比较,探讨了燃烧生物质气对燃烧室内部流动、温度分布和NOx排放造成的影响及其原因,为今后生物质气微型燃气轮机燃烧室的设计应用提供了数据.     

燃料热值对不同燃烧方式下燃气轮机燃烧特性的影响

针对燃气轮机运行过程中出现的燃烧不稳定和污染物排放高的问题,开展了燃料热值对不同燃烧方式下燃气轮机燃烧特性（燃烧稳定性和污染物排放影响规律）影响的研究。以某重型燃气轮机分管燃烧室为研究对象,在扩散燃烧和预混燃烧方式下,保持燃料流量、空气流量及大气温度等参数不变,仅改变燃料热值,采用数值仿真方法对燃烧室设计监测点处压力、燃烧室出口温度及污染物排放等数据进行分析。研究表明：在扩散燃烧方式下,热值较低时,燃烧室高频压力脉动较大,热值增加,燃烧室低频压力脉动先减小后增加;在预混燃烧方式下,热值增加,燃烧室高频压力脉动减小;在两种燃烧方式下,热值增加,燃烧室出口NO_x排放均增加,而热值变化对燃烧室出口CO的排放影响较小。     

SGT5-4000F型燃气轮机燃烧室介绍

详细介绍了SGT5-4000F型燃气轮机燃烧室整体及主要部件结构,并对SGT5-4000F型燃气轮机的运行模式进行了介绍。本文对了解先进的重型燃气轮机燃烧室具有积极意义,对设计自己的燃烧室具有较大的启发意义。     

重型燃气轮机燃烧室流动特性研究

为了探究燃烧室流动特性,为燃气轮机燃烧室设计改型、燃气轮机的安全稳定运行及合理的组织燃烧室流场提供参考依据,本文基于某重型燃气轮机分管型燃烧室,建立了预混燃烧模式下燃烧室三维数值仿真模型,采用数值模拟方法研究了燃烧室温度场、压力场、速度场以及主要组分浓度场的分布规律。结果表明:燃烧室旋流喷嘴下游中心区域为局部高温区,在喷嘴射流区存在低温区域,燃烧室中后部温度高于燃烧室头部温度;燃烧室头部压力较大,后部压力分布趋于均匀;燃烧室喷嘴及燃烧室头部区域,回流区域明显;旋流喷嘴附近NOx质量分数最大。     

某型燃气轮机燃烧室燃烧流场数值研究

燃气轮机燃烧室的燃烧特性受到旋流强度、雾化特性等因素的强烈影响,旋流强度和雾化特性分析对燃烧室的设计和优化具有非常重要的作用。对燃气轮机燃烧室的燃烧流场,应用商用程序FLUENT进行了数值模拟,并分析了空气过量系数α和燃油雾化粒径对燃烧室内燃烧特性的影响。模拟结果表明,控制空气过量系数和燃油雾化粒径对提高燃烧室工作性能和降低污染物排放具有重要意义。     

某重型燃气轮机DLN燃烧室数值模拟-热态分析

数值模拟是开展燃气轮机燃烧室性能分析的重要手段。本文通过外形3D扫描与内型工业CT扫描构建了某重型燃气轮机天然气DLN燃烧室的完整几何模型。通过对该完整三维建模进行高质量网格划分,并综合燃气轮机循环分析给出的工况参数,开展了数值模拟分析。本文热态模拟了燃烧室内流场、温度场及组分场,发现该型燃烧室喷嘴布置方式存在中心区域不能完全燃烧的风险。研究方法与结果可为燃气轮机DLN燃烧室的分析与设计提供参考。     

GTD-350燃气轮机监测系统研究

在GTD-350燃气轮机验收试验台上，对监测系统的硬件组成和软件进行设计，介绍了燃气轮机转速、燃油滑油温度、压力、流量等参数的测量系统，并给出一部分实验结果，通过初步研究得出一些负荷变化对燃气轮机动态过程的影响。     

Performance analysis of a pressurized molten carbonate fuel cell/micro-gas turbine hybrid system

This paper presents the work on the design and part-load operations of a hybrid power system composed of a pressurized molten carbonate fuel cell (MCFC) and a micro-gas turbine (MGT). The gas turbine is an existing one and the MCFC is assumed to be newly designed for the hybrid system. Firstly, the MCFC power and total system power are determined based on the existing micro-gas turbine according to the appropriate MCFC operating temperature. The characteristics of hybrid system on design point are shown. And then different control methods are applied to the hybrid system for the part-load operation. The effect of different control methods is analyzed and compared in order to find the optimal control strategy for the system. The results show that the performance of hybrid system during part-load operation varies significantly with different control methods. The system has the best efficiency when using variable rotational speed control for the part-load operation. At this time both the turbine inlet temperature and cell operating temperature are close to the design value, but the compressor would cross the surge line when the shaft speed is less than 70% of the design shaft speed. For the gas turbine it is difficult to obtain the original power due to the higher pressure loss between compressor and turbine.     

Comparison between externally fired gas turbine and gasifier-gas turbine system for the olive oil industry

The olive oil industry generates during the extraction process several solid wastes as olive tree leaves and prunings, exhausted pomace and olive pits. These renewable wastes could be used for power and heat applications. The aim of this paper is to compare the performance of two small-scale CHP systems: a gasification- gas turbine system and an EFGT (externally fired gas turbine system). For this reason, several parameters have been calculated: generated heat and power, electric and overall efficiencies, biomass consumption, exergy efficiency, optimum pressure ratio, etc. These systems provide 30 kW_e and about 60kW_th. Simulation results show that the electrical and overall efficiencies achieved in EFGT system (19.1% and 59.3%, respectively) are significantly higher than those obtained in the gasification plant (12.3% and 45.4%). The proposed CHP systems have been modeled using Cycle-Tempo^® software.     

Energy and exergy analysis of a new hydrogen-fueled power plant based on calcium looping process

A novel hydrogen-fueled power plant with inherent CO₂ capture based on calcium looping process is proposed in this paper. The analyzed system has been evaluated from the energy and exergy points of view, it enables determination of the contribution of main component to the total exergy loss. The results show that energy and exergy efficiencies of the system are 42.7% and 42.25% respectively, combustion chamber and regenerator are responsible for large exergy destructions, mainly due to irreversibilities associated with the combustion reactions, they have great potential for system efficiencies improvements. The effects of various air pressure ratios and gas turbine inlet temperatures on the system thermodynamic performance are also presented. The thermodynamic efficiencies increase with the increase in air pressure ratios and gas turbine inlet temperatures.     

M701F型燃气轮机控制系统分析

M701F燃机DCS采用DiasysNetmation,其控制主要由燃机控制系统、燃机保护系统和高级燃烧压力波动监视系统组成。本文简要介绍了M701F燃机DCS系统的构成,分别叙述了TCS、TPS和ACPFM自控制系统的作用,并对其主要控制功能进行了分析。     

重型燃气轮机控制发展趋势及未来关键技术

我国重型燃气轮机发展明显滞后、燃机控制系统的研究更是基础薄弱,开展我国重型燃气轮机的控制技术和控制系统研究迫在眉睫.对重型燃气轮机控制系统的发展进行了综述,通过分析控制系统的设计需求和回顾国外典型控制系统的发展,对未来控制系统关键技术进行了展望.     

孟加拉某燃气轮机电站重油处理及供应系统研究

以孟加拉某209E双燃料燃气-蒸汽联合循环电站为例,研究了重油处理及供应系统的工艺流程设计及控制逻辑设计方案。研究表明:整套系统达到预期效果,且很好地满足了燃气轮机对重油燃料的理化性质要求,有效地保证燃烧效果,为机组安全稳定运行提供了有力保障,为同类型的海外燃气轮机电站提供一些借鉴和指导。     

燃机运行中对排烟温度分散度监视的重要性

在燃机运行过程中对排温度分散度的监视非常重要。本文分析了造成排烟温度分散度大的一般原因,阐述了排烟温度分散度大对燃机热部件的危害,同时还对控制系统中排烟温度分散度允许值的计算方法进行了简单的说明,最后对在运行过程中如何对排烟温度分散度进行监视进行了说明。     

一种新型压缩空气储能系统的理论分析

根据中国西部干旱、缺水、高风沙和限制使用天然气的地区特点,提出了一种压缩空气储能的技术方案,并对其储能过程和发电过程进行了热力学分析,重点分析了压缩过程指数、最高储气压力和透平进气温度对系统能量转换效率的影响规律。研究结果表明:(1)系统电耗随多变指数的升高基本保持不变,能量效率都随多变指数的升高而增加,而热耗随多变指数的升高而大幅减小。(2)系统电耗和热耗都随压缩空气储能系统高压储气室内压力的变大而增加,而系统的能量效率随压缩空气储能系统高压储气室内压力变大而减小。(3)系统电耗和热耗都随高压气体透平进气温度的升高而下降,而系统的能量效率随高压气体透平进气温度的升高而升高。该研究对在中国开展和大规模推广应用压缩空气储能技术具有一定的参考价值。     

Synergistic integration of a gas turbine and solid oxide fuel cell for improved transient capability

A theoretical solid oxide fuel cell–gas turbine hybrid system has been designed using a Capstone 60 kW micro-gas turbine. Through simulation it is demonstrated that the hybrid system can be controlled to achieve transient capability greater than the Capstone 60 kW recuperated gas turbine alone. The Capstone 60 kW gas turbine transient capability is limited because in order to maintain combustor, turbine and heat exchangers temperatures within operating requirements, the Capstone combustor fuel-to-air ratio must be maintained. Potentially fast fuel flow rate changes, must be limited to the slower, inertia limited, turbo machinery air response. This limits a 60 kW recuperated gas turbine to transient response rates of approximately 1 kW s⁻¹. However, in the SOFC/GT hybrid system, the combustor temperature can be controlled, by manipulating the fuel cell current, to regulate the amount of fuel sent to the combustor. By using such control pairing, the fuel flow rate does not have to be constrained by the air flow in SOFC/GT hybrid systems. This makes it possible to use the rotational inertia of the gas turbine, to buffer the fuel cell power response, during fuel cell fuel flow transients that otherwise limit fuel cell system transient capability. Such synergistic integration improves the transient response capability of the integrated SOFC gas turbine hybrid system. Through simulation it has been demonstrated that SOFC/GT hybrid system can be developed to have excellent transient capability.