炉膛压力控制系统组态设计Word文档下载推荐.doc

炉膛压力控制系统组态设计Word文档下载推荐.doc

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因此，监视和控制炉膛负压对于保证炉内燃烧工况的稳定、分析炉内燃烧工况、烟道运行工况、分析某些事故的原因均有极其重要的意义。

本设计就是从锅炉引风机方面进行炉膛负压的研究。

目前国内火力发电厂锅炉风机大部分采用拖动电动机，其中95％左右为交流异步

电动机直接拖动，恒速运行。

随着电力经济的发展等，使电厂中的锅炉风机在运行中出现了裕量较大的问题，另外根据电网调峰的需要，机组长时间处于低负荷运行状态，使锅炉的送、吸风机长期处于低参数下运行，对厂用电率造成一定影响。

目前国内直属发电厂锅炉风机配备的电动机以1MW左右居多，大部分都是采用恒速运行，造成很大的浪费。

根据节能工作的要求，其中有个别发电厂已考虑或试用风机调速运行，解决目前风机运行中出现裕量过大的问题。

风机调速有几种方案，其中，应用最多的是变频器技术，或加装液力偶合器装置。

本设计对防城港#2机组进行分析、研究，了解其炉膛压力和送、引风机之间的关

系并对其控制系统进行分析。

关键词炉膛压力,变频调速,液力耦合器调速

Abstract

Parametersstability,controlandsurveillanceisinoperationtooneoftheimportantparameters。

Thesituationchangedoncetheheatercombustion,chamberpressurecorrespondingchangesoccurimmediately.Whentheboilercombustionsystemfailureorunusual,thefirstnegative,willbereflectedinthechamber,thenisthefirelocation,suchaschangesinflamesandsecondlyisthesteamparameterschange.Therefore,surveillanceandcontrolofcombustionchamberpressuretoensurethatthestatusoftheheaterstability,thesituationanalysisoftheheatercombustion,flue-operationstatus,analysisofcertaincausesofaccidentsareextremelyimportant.Fromtheboilerair-compressorsdesignedforchamberpressureresearch.

Mostofthecurrentdomesticpowerboilersair-compressorsusedMercedeselectricmotors,whichexchangesasynchronousmotorforabout95%ofdirectfees,Hengsuoperation.Withthepowerofeconomicdevelopment,singleunitsincreasedcapacityandthedevelopmentofscienceandtechnology,enterprisemanagementimprovements,thepromotionoftechnologicaltransformationequipment,theplant'

sboilersair-compressorsinoperationemergedYulargervolume,andaccordingtotheneedsofpowerplants,generatingprolongedlowloadoperation,boilerssend,smokinginalowlong-termparametersoftheoperationofair-compressors,electricityrateshaveanimpactontheplant..Currentdomesticair-compressorswiththeimmediatepowerplantboilerstoelectricmotorsarearound1MW,mostlyusedHengsuoperation,causinggreatwaste.Accordingtotheenergyconservationrequirements,includingindividualpowerplantshaveconsideredortestedair-compressorsgovernoroperation,asolutiontothecurrentair-compressorsoperationYuremainedproblems.Air-compressorsgovernorseveralprogrammes,includingmostofthetransducertechnologyapplications,coupledwiththeinstallationofhydraulicdevices.

Thedesignoftheabovetwoprogrammescomparativestudy,anumberofplant-transformationcanprovidesomerecommendations.

Keywordsfurnacepressure,frequencyconversionmechanics,hydrauliccouplingdevicegovernor

目录

摘要............................................................................................................................................I

Abstract.....................................................................................................................................II

目录......................................................................................................III

1引言.....................................................................................................1

1.1炉膛压力控制的背景.....................................................................................................1

1.2炉膛压力控制的目的和意义.........................................................................................1

2炉膛压力控制系统及燃烧控制系统介绍................................................2

2.1火电厂发电工艺.............................................................................................................2

2.2锅炉燃烧情况以及对于炉膛压力的影响.....................................................................4

2.3锅炉燃烧系统的风机介绍.............................................................................................4

3防城港DCS炉膛压力控制系统..............................................................6

3.1DCS系统的概念..............................................................................................................6

3.1.1用DCS实现大型火电机组自动化的主要优点......................................................6

3.2SYMPHONY分散控制系统.................................................................................................7

3.2.1HCU结构.................................................................................................................7

3.2.2HCU的通信模件对.................................................................................................8

3.2.3SYMPHONY系统网络结构...................................................................................8

3.2.4SYMPHONY系统主要软硬件及其功能介绍.......................................................9

4防城港电厂#2机组炉膛压力控制系统设计..........................................11

4.1炉膛压力控制系统.......................................................