DCS在火力发电厂烟气脱硫控制系统的应用及实施

发布时间：2018-01-08 20:43

本文关键词：DCS在火力发电厂烟气脱硫控制系统的应用及实施　出处：《华北电力大学》2014年硕士论文　论文类型：学位论文

【摘要】：目前，分散控制系统(Distribution Control System，简称DCS)在各行各业都已经得到了广泛的应用，譬如电力、石油、化工、冶金、制药、环保等领域，且取得了显著的经济效益和社会效益。DCS基本思想是分散控制、集中操作、分级管理、配置灵活以及组态方便，随着计算机技术、通讯技术、网络技术的迅速发展，以及各DCS厂家的竞争加剧，DCS软硬件价格逐步下降，可靠性不断提高，为分散控制系统进一步扩大市场份额奠定了坚实的基础。本文作者针对基于火力发电厂烟气脱硫系统的分散控制系统的应用与实施来进行研究，从火力发电厂烟气脱硫系统的基本原理和石灰石-石膏湿法烟气脱硫技术的理论做研究分析，并通过对现阶段主流的控制系统分析比较，结合电厂的实际情况，选用DCS作为脱硫的控制系统。阐述了脱硫系统的总体控制策略，设计了脱硫DCS控制系统的数据采集与处理系统（DAS）、模拟量控制系统（MCS）、顺序控制系统（SCS）和主要的联锁保护，针对系统在现场应用中的复杂而恶劣的应用环境，通过对控制策略的改进提高了系统的可靠性。从单体调试、分系统调试、整套调试及脱硫系统的168h试运简要介绍了脱硫的调试工作，，同时还讲述了脱硫系统在试运过程中遇到的主要问题及解决方案。山西漳山电厂脱硫系统在整套调试和实际应用期间，经历了各种负荷及运行工况的考验，主要系统均能连续、稳定的正常投入运行，通过DCS控制系统，运行人员能方便的控制各种参数，确保了系统的稳定运行，也充分验证了控制系统的可靠性和稳定性。
[Abstract]:At present, the distributed control system (Distribution Control System, referred to as DCS) in all walks of life have been widely used, such as electric power, petroleum, chemical, metallurgy, pharmaceutical, environmental protection and other fields, and has achieved remarkable economic and social benefits of.DCS basic thought is decentralized control, centralized operation, hierarchical management, flexible configuration and convenient configuration, with the development of computer technology, communication technology, the rapid development of network technology, as well as the DCS manufacturers competition, gradually decreased DCS hardware prices, increased reliability, and laid a solid foundation for the distributed control system to further expand market share.
In this paper the application and implementation of distributed control system of thermal power plant flue gas desulphurization system based on the research, from the basic principle of limestone and thermal power plant flue gas desulphurization system of gypsum wet flue gas desulfurization technology theory research and analysis, and compare the control system of the present mainstream analysis, combined with the actual situation of power plant, DCS was chosen as the control system of desulfurization. The control strategy of the desulfurization system, the design of data acquisition and processing system of desulfurization of DCS control system (DAS), analog control system (MCS), sequence control system (SCS) and the main interlock protection system for the application in the field of complex and harsh the application environment, through the improvement of control strategy to improve the reliability of the system. From the single debugging, system debugging, debugging and complete set of desulfurization system commissioning are briefly introduced and 168h At the same time, the main problems encountered in the process of the desulfurization system and the solutions are also described.
Shanxi Zhang Shan power plant desulfurization system during the whole debugging and practical application, through various load and operating conditions of the test, the main system can continuous, stable normal operation, through the DCS control system, operator can control various parameters conveniently, to ensure the stable operation of the system, but also fully validate the control system the reliability and stability.

【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：X773

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