300MW机组机务部分初步设计论文.doc
300MW机组机务部分初步设计论文摘 要 本次设计为300MW机组热力部分局部初步设计，本次设计在进行设计选型时仅依照安全经济的标准进行优化没有考虑其他影响因素，充分借鉴铁岭发电厂备选型及其方案。经过设计最终确定了汽轮机以及锅炉的形式。其中汽轮机部分包括进汽压力、温度，汽耗量，机组热耗量，全厂热效率，全厂热耗率，发电标准煤耗率。锅炉部分包括最大连续蒸发量，锅炉效率。在确定完主机形式的基础上进一步拟定了主要系统并确定了主要辅机的形式。其中系统的拟定包括主蒸汽管道系统的拟定，再热机组旁路系统的拟定，给水管道系统的拟定，回热加热器管道系统的拟定，除氧器管道系统的拟定，补充水管道系统的拟定，排污扩容器及排污冷却器管道系统的拟定，轴封管道系统的拟定，制粉系统的拟定等。确定的主要辅机有磨煤机、给煤机、送风机、引风机、给粉机、粗粉分离器、给水泵等。本文设计在选型时仅依照安全经济的标准进行优化没有考虑其他影响因素。关键词：汽轮机,锅炉,热力系统，辅机形式 AbstractThe design for the thermal part of the 300MW unit of local preliminary design, the design during the design selection only in accordance with the standards of safety and economic optimization does not take into account other factors, take lessons from Tie Ling Power Plant equipment selection and its programs.After the final design to determine the form of steam turbine and boiler. Some of which include the steam turbine inlet pressure, temperature, gas consumption, unit heat consumption, thermal efficiency of the plant, the plant heat rate, generation standard coal consumption rate. Maximum continuous boiler parts, including evaporation, boiler efficiency.In determining the form of end hosts on the basis of further development of the main auxiliary systems and identifies the major form. Which developed the system, including the formulation of the main steam piping system, reheat unit bypass system in the formulation, development of water supply piping system, heat recovery heater piping system formulation, the formulation of oxygen pipeline system to supplement the proposed water pipeline system sewage and sewage expansion devices proposed pipeline system cooler, seal piping systems in the formulation, the formulation of the milling system, etc. Have identified the main auxiliary mill, coal feeder, blower, induced draft fan, to the powder, coarse separator, feed water pump and so on.This design only in the selection criteria in accordance with the safe and economic optimization does not take into account other factors.Keywords: steam turbine, boiler, heating system, auxiliary for目录中文摘要.IABSTRACT.II目录.第一章 发电厂主要设备的确定.21.1 汽轮机型式、参数、容量的确定.21.2 锅炉型式容量的确定.2第二章 锅炉燃烧系统及其设备的选择.32.1 燃烧系统的计算.52.2 制粉系统的确定.72.3 磨煤机的选择.92.4 给煤机的选择.102.5 送风机、一次风机的选择.122.6 引风机的选择.132.7 除尘设备的选择.13第三章 原则性热力系统的拟定、计算.143.1 补充水系统的拟定.153.2 锅炉连续排污利用系统的拟定.153.3 绘制原则性热力系统图.163.4 绘制汽机热力过程线及汽水综合参数表.163.5 锅炉连续排污利用系统的计算.183.6 回热系统计算.183.7 汽轮机总汽耗量及各项汽水流量计算.243.8 热经济指标计算.28第四章 汽机车间主要设备的确定.324.1 高低压加热器的选择.334.2 凝汽器与轴封加热器的选择.344.3 给水泵的选择.
