《毕业设计（论文）炉膛压力控制系统组态设计》由会员分享，可在线阅读，更多相关《毕业设计（论文）炉膛压力控制系统组态设计（33页珍藏版）》请在金锄头文库上搜索。
1、炉膛压力控制系统组态设计 摘 要炉膛压力是反映燃烧工况稳定与否的重要参数，是运行中要控制和监视的重要参数之一。炉内燃烧工况一旦发生变化，炉膛负压随即发生相应变化。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
2、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1 MW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 AbstractParameters stability, control and surveillance is in operation to one of the im
3、portant parameters。The situation changed once the heater combustion, chamber pressure corresponding changes occur immediately. When the boiler combustion system failure or unusual, the first negative, will be reflected in the chamber, then is the fire location, such as changes in flames and secondly
4、 is the steam parameters change. Therefore, surveillance and control of combustion chamber pressure to ensure that the status of the heater stability, the situation analysis of the heater combustion, flue-operation status, analysis of certain causes of accidents are extremely important. From the boi
5、ler air-compressors designed for chamber pressure research.Most of the current domestic power boilers air-compressors used Mercedes electric motors, which exchanges asynchronous motor for about 95% of direct fees, Hengsu operation. With the power of economic development, single units increased capac
6、ity and the development of science and technology, enterprise management improvements, the promotion of technological transformation equipment, the plants boilers air-compressors in operation emerged Yu larger volume, and according to the needs of power plants, generating prolonged low load operatio
7、n, boilers send, smoking in a low long-term parameters of the operation of air-compressors, electricity rates have an impact on the plant. . Current domestic air-compressors with the immediate power plant boilers to electric motors are around 1 MW, mostly used Hengsu operation, causing great waste.
8、According to the energy conservation requirements, including individual power plants have considered or tested air-compressors governor operation, a solution to the current air-compressors operation Yu remained problems. Air-compressors governor several programmes, including most of the transducer t
9、echnology applications, coupled with the installation of hydraulic devices. The design of the above two programmes comparative study, a number of plant-transformation can provide some recommendations.Keywords furnace pressure, frequency conversion mechanics, hydraulic coupling device governor目 录摘要.I
10、Abstract.II目录.III1 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.12 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.43 防城港DCS炉膛压力控制系统.6 3.1 DCS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 3.2 SYMPHONY分散控制系统.7 3.2.1 HCU结构.7 3.2.2 HCU的通信模件对.8 3.2.3 SYMPHONY系统网络结构.8 3.2.4 SYMPHONY系统主要软硬件及其功能介绍.94 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.
