600MW机组磨煤机调节系统毕业设计.doc

摘要 在飞速发展的今天，人们已经离不开电，所以电力的发展决定着人类的发展水平。我们要大大的重视电厂的用电结构变化，要对电厂机组进行更细心的控制，已出尽人类的发展，另外，机组容量不断地增加，锅炉的蓄热量相对减少，采用机炉分别控制方式已不适应外界负荷的要求和保持机炉之间的平衡，因此通常采用锅炉汽轮发电机组的单元制运行方式。在这种运行方式下，即机跟炉和炉跟机、机炉协调等控制方式。按锅炉、汽轮机在控制过程中的任务和相互关系的不同，可以构成这三种基本形式。 此外，为了使电厂能够安全、稳定地运行，对磨煤机、给煤机及风烟等各部分的控制也十分重要。 磨煤机是火电厂重要的辅机，磨煤机运行的好坏直接营销到火电厂锅炉能否安全、经济、稳定运行，也直接关系到电厂整个机组能否安全、经济、稳定运行。给煤控制的任务在于进入锅炉的煤量随时与外界负荷要求相适应。因为汽压是锅炉燃料量与汽轮机需要能量的平衡标志，并且在负荷扰动下汽压具有近似比例的响应特点，因此汽压可以作为燃料控制系统的被调量。 锅炉风烟系统即为一平衡通风系统，即利用一次风机、送风机和引风机来克服气流流通过程中的各项阻力。平衡通风系统不仅是炉膛及尾部烟道的漏风不会太大，保证较高的经济性，而且还能防止炉内高温烟气外贸，对于运行人员的安全和锅炉房岛的卫生条件均有好处。 这次设计的主要内容是对磨煤机控制、一次风控制及磨煤机出口煤粉控制进行设计。 关键词：磨煤机 给煤机 一次风 控制 Abstract In the rapid development of today, people can not do without electricity, so the development of the power level of human development. We have to much attention structural changes of the plants electricity, more careful control of the power plant unit, has the best human development, in addition, the capacity of the units continue to increase, relative reduction of the heat storage capacity of the boiler, turbine and boiler respectively. control methods were not suited to the requirements of the external load and to maintain a balance between the turbine and boiler, usually a boiler turbogenerator unit system operating mode. In this operating mode, ie machine with a furnace and the furnace with the machine, boiler-turbine coordination control. Boiler, steam turbine in the control process of the task and the relationship between different, can constitute the three basic forms. In addition, in order to make the power plant can be safely and stable run of the mill, is also very important to the control of various parts of the stoker and Feng Yan. Is an important auxiliary of the thermal power plant coal mill, coal mill to run a direct marketing to the thermal power plant boiler whether the security, economic, and stable operation of, but also directly related to the entire unit of the power plant can safely, economy, stabilityoperation. Task to control coal