海洋平台燃气轮机发电机组余热回收装置的设计研究

发布时间：2018-03-22 17:11

本文选题：燃气轮机　切入点：余热回收　出处：《西南石油大学》2014年硕士论文　论文类型：学位论文

【摘要】：本文以海洋平台某型号燃气轮机发电机组尾气余热为对象,以回收余热用以产能为目的,为该型号燃气轮机发电机组设计余热回收装置。所做的主要内容有：根据目前所使用的海洋平台燃气透平发电机组余热回收装置的不足,提出燃气--蒸汽联合循环余热回收方案。通过现场调研、方案设计和理论分析对余热回收装置中的关键设备进行选型设计,初步设计一套余热回收装置,并对其进行经济性与热效率评价。根据所选余热锅炉的特点,对数学模型作出合理简化,并利用计算机仿真软件建立余热锅炉的稳态仿真模型,通过建立余热锅炉换热区的三个子模块——省煤器模块、蒸发器模块和过热器模块,从而组建余热锅炉整体模型,模型可较精确的计算出余热锅炉在燃气轮机不同尾气参数下所产过热蒸汽参数。采用曲线拟合的方法,研究该余热回收装置中余热锅炉产汽参数随燃气轮机不同负载不同工况下的变化规律,确定所设计余热回收装置对目标燃气轮机各工况的使用范围。将整套联合循环系统的热效率计算公式模块化,建立模块化的仿真模型,通过模型计算、曲线拟合的方法,对整套系统的在许用条件下不同负载不同工况的热效率变化规律进行了研究。本论文对采用燃气--蒸汽联合循环发电的方式回收海洋平台燃气轮机发电机组的尾气余热进行了尝试,对于海洋平台某常用燃气轮机余热回收装置的设计应用及改良有一定的参考意义。所建立的稳态模型仿真模型和热效率计算模型具备较好的精度,对设计计算及性能研究有一定的辅助作用。
[Abstract]:In this paper, the waste heat recovery device is designed for a certain type of gas turbine generator set based on offshore platform for the purpose of recovering the waste heat for production capacity. The main contents of this paper are as follows:. According to the deficiency of the waste heat recovery device of the offshore platform gas turbine generator set at present, the waste heat recovery scheme of the gas-steam combined cycle is put forward. The scheme design and theoretical analysis are carried out to select and design the key equipment in the waste heat recovery unit, and a set of waste heat recovery device is designed preliminarily, and its economy and thermal efficiency are evaluated. According to the characteristics of the selected waste heat boiler, the mathematical model is reasonably simplified, and the steady state simulation model of the waste heat boiler is established by using the computer simulation software. Through the establishment of three sub-modules of the heat transfer zone of the waste heat boiler, the economizer module is established. The evaporator module and superheater module are used to build the whole model of the waste heat boiler. The model can calculate the superheated steam parameters of the waste heat boiler under different exhaust gas parameters of the gas turbine accurately. The curve fitting method is used. The variation law of steam production parameters of waste heat boiler with different load and different working conditions of gas turbine in this waste heat recovery unit is studied, and the range of application of the designed waste heat recovery device to each working condition of target gas turbine is determined. The thermal efficiency formula of the whole combined cycle system is modularized, and the modular simulation model is established. Through the model calculation, the method of curve fitting is used. The variation law of thermal efficiency of the whole system under different loads and different working conditions is studied. This paper attempts to recover the tail gas waste heat of gas turbine generator set on offshore platform by gas-steam combined cycle power generation. It has some reference significance for the design, application and improvement of the waste heat recovery device of a common gas turbine on offshore platform. The simulation model of steady state model and the model of thermal efficiency calculation have good accuracy. It is helpful to design calculation and performance research.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM31

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