dg精编优选-精编电站煤粉锅炉热力计算

毕业设计（论文）题目名称：燃用烟煤的DG-1025/17.8-553/566电站煤粉锅炉热力计算院系名称：能源与动力学院班级：热能与动力工程学号：学生姓名：指导教师：年月燃用烟煤的DG-1025/17.8-553/566电站煤粉锅炉热力计算BoilerdesignandthermalcaculationofDG-1025/17.8-553/566coal-firedpowerplant学院名称：能源与动力学院班级：学号：学生姓名：指导教师：年月摘要随着国民经济和电力负荷的迅速增长，电网容量也随之增长，电力需求越来越大，发展电力产业已刻不容缓。本文以燃用烟煤的DG-1025/17.8-553/566电站煤粉锅炉热力系统设计计算为例，简述了大型电站煤粉锅炉设计的步骤和方法，并对计算结果进行分析，指出设计过程中的问题和不足，以及对发展计算机技术在锅炉设计中应用的期望。本文叙述了燃用烟煤的DG-1025/17.8-553/566电站煤粉锅炉热力系统的设计过程。首先确定了锅炉的整体布置，包括前屏过热器，后屏过热器，对流过热器，高温再热器，低温再热器，省煤器和回转式空气预热器的布置；然后确定锅炉的汽水系统和烟风系统的流程，并绘制锅炉热力系统图；最后详细阐述了锅炉各个受热面的结构设计以及热力计算过程，并进行热力计算数据的修正以及计算结果校核。本文还对锅炉排烟温度，热空气温度和燃烧器主要参数的选取进行了分析,并阐述了锅炉汽温的调节方法。关键词：电站锅炉热力系统设计ABSTRACTWiththerapidgrowthofthenationaleconomyandpowerload,powercapacityandthedemandforelectricityalsoincrease,thedevelopmentofpowerindustryhasbecomeessential.Inthispaper,thecalculationdesignforthermodynamicsystemofDG-1025/17.8-553/566boiler,forexample,describesthedesignstepsandmethodsofthelarge-scalecoalpowerplantboiler,andresultsanalysis,andtheproblemsanddeficienciesofthedesignprocess,aswellastheexpectationsofthedevelopmentofcomputertheapplicationoftechnologyinboilerdesign.ThepaperdescribesthedesignprocessofthermodynamicsystemofDG-1025/17.8-553/566boiler.Firstly,wedeterminedtheoveralllayoutoftheboiler,includingtheformerscreensuperheater,rearscreensuperheater,convectionsuperheater,high-temperaturereheater,lowtemperaturereheater,economizerandrotaryarrangementairpreheater;andthenwedeterminedthethewaterflowsystemandsmokeflowsystem,anddrewthediagramofboilerthermodynamicsystem;Atlast,wedetailedelaboratedthestructuredesignandthermodynamiccalculationofeachheatingsurfaceofboiler,andthedataamendmentofthermodynamiccalculationsandcheckoftheresult.Paperalsoanalyzedthetemperatureofexhaustedgasandhotair,andtheselectetofthemainparametersofburner,andelaboratedtheregulationmethodofsteamtemperature.Keywords:plantbolierthermalsystemdesign目录1.设计目的.........................................................................................................................................2.设计要求.........................................................................................................................................3.设计及计算方法.............................................................................................................................4.现状与趋势.....................................................................................................................................5.设计任务书.....................................................................................................................................5.1设计题目..............................................................................................................................5.2原始资料..............................................................................................................................6.煤的元素分析数据校核和煤种判别.............................................................................................6.1煤的元素各成分之和为100%的校核................................................................................6.2元素分析数据校核..............................................................................................................6.3煤种判别..............................................................................................................................2.锅炉整体布置的确定.............................................................................................................................2.1炉整体的外型——选Π型布置.................................................................................................2.2受热面的布置..............................................................................................................................2.3汽水系统......................................................................................................................................3.燃烧计算和锅炉热平衡计算.................................................................................................................3.1燃烧计算.....................................................................................................................................3.2热平衡及燃料消耗量计算..........................................................................................................4.炉膛热力计算.........................................................................................................................................4.1炉膛结构尺寸计算......................................................................................................................4.1.1炉膛的几何特征参数及确定原则...................................................................................4.1.2炉膛容积的确定...............................................................................................................4.1.3锅炉炉墙和水冷壁...........................................................................................................4.1.4炉膛结构数据...................................................................................................................4.2炉膛热力计算............................