输煤机组系统的PLC控制.docVIP

JIUJIANG UNIVERSITY 毕 业 设 计 题 目 锅炉车间输煤机组系统PLC控制 英文题目 The PLC control unit for Boiler plant coal handling system 院 系 XXXXXXXXXXXXXXXXXXXX 专 业 机械设计制造及其自动化 姓 名 XXXXXX 年 级 XXXXXXXXXXXXXX 指导教师 XXX XXX年XXX月 摘 要 传统的发电厂输煤系统是一种基于继电接触器和人工手动方式的半自动化系统。由于输煤系统现场环境十分恶劣，不仅极大损害了工人的身体健康，而且由于输煤系统范围大，经常有皮带跑偏、皮带撕裂及落煤管堵塞等等麻烦，大大降低了发电厂的生产效率。随着发电厂规模的扩大，对煤量的需求大大提高，传统的输煤系统已无法满足发电厂的需要。 通过对PLC的应用，对火电厂的配煤系统进行了设计，对原有的传统手动配煤方式进行了优化和改进。本课题的主要目标是改变以往配煤系统的传统手动配煤方式，提高运行人员工作效率，从煤源上进行煤量配比控制，解决电厂的配煤问题，提高电厂的燃煤效率和经济效益。现在电厂使用煤种的多样性和不稳定性，再加上各种工业环境的影响，我们要找出影响配煤效率的主要技术难点，利用PLC控制，尽可能的降低煤损耗，提高煤的利用率，提高电厂产值效益。 【关键字】 PLC；输煤机组 Abstract Traditional power plant coal handling system is based on relay contacts and artificial semi-automatic system manually. The coal handling system on-site environment is very bad, not only greatly damage the health of workers, and because the coal handling system range, wandering belt, belt tear and coal drop pipe plug trouble, greatly reduce the power plant productivity. With the expansion of power plants, the amount of the demand for coal has greatly improved the traditional coal handling system has been unable to meet the needs of power plants. PLC by the application of the blending system of thermal power plants were designed, blending the original traditional way of manually optimized and improved. The main objective of this project is to change the past, blending the traditional manual system of blending methods, improving the efficiency of operating personnel, the source from coal ratio control on the amount of coal. Now use the coal power plant diversity and instability, coupled with the environmental impact of various industries, we have to find the efficiency of blending the main technical difficulties, the use of PLC control, reduce coal consumption as much as possible to improve coal utilization, inc