锅炉吹灰系统PLC控制的设计-精品.doc

锅炉吹灰系统PLC控制的设计 PAGE PAGE I 摘 要 本文对基于PLC控制的燃气脉冲吹灰器进行了介绍。针对工业锅炉的积灰原因以及积灰后对锅炉的影响,人们提出了锅炉吹灰的概念。本文列举了几种常用的工业锅炉吹灰设备，重点阐述燃气脉冲吹灰设备，并提出针对工业自动化的需求，引入目前工业控制市场上流行的西门子公司的S7-200系列可编程控制器进行编程和调试。S7-200系列可编程控制器具有抗干扰能力强，可靠性高，体积小巧，编程简单灵活等特点，而且具有很强的可扩展性和通信能力，S7-200的特点在燃气脉冲吹灰器控制系统中得到了充分体现。 本文使用S7-200系列PLC的相关软件STEP 7–Micro/WIN进行编程和调试，使PLC通过接触器控制电动球阀和电磁阀以及点火器工作。电动球阀用来选择吹灰层面，电磁阀用来控制气体流量，点火器用来点燃可燃混合气体。在实际工作运行中，基于PLC控制的燃气脉冲吹灰器在工业锅炉吹灰技术中效果显著。 关键词：吹灰器、可编程控制器、S7-200系列，STEP 7–Micro/WIN、 Abstract This text has introduced Blowing-Ash-Equipment which is controlled with PLC technology to control the pulse in blowing the ash .When it has been researched the reason of the accumulating-ash and its bad aspect to the industrialized boiler, people have put forward to the concept in boiler-blowing. This paper has enumerated some kinds of general industrial boiler blowing-ash equipments and elaborated the Blowing-Ash- Equipment. With the demand according to industrial automation，we have selected the S7-200 PLC series which is very popular in the industrial control market at the present time to do programming and debugging. S7-200 PLC series have the stronger ability of anti-jamming、higher reliability 、smaller in size and easy in programming and so on . It has very strong expansibility and communication ability, the characteristic of S7-200 has made a sufficient effect in Blowing-Ash-Equipment This text uses related software STEP7-Micro/WIN of S7-200 series PLC to carry out programming and debugging , it makes PLC control electric ball valve and electromagnetism valve as well as igniter work through contactor. Electric ball valve is used to select the blowing layer surface, electromagnetism valve is used to control gas rate of flow, igniter is used to light mixed burnable gas. In actual working operation based on PLC control burning gas pulse Blowing-Ash-Equipment to blow the ash in industrial boiler has get the effect notable. Key words：Blowing-Ash-Equipment、Programmable Logic Controller、 S7-200 ser