摘 要
本文主要研究的是锅炉燃烧系统的控制问题。锅炉是热电厂最基本也是最重要的设备，使用锅炉就是为了利用其输出的蒸汽，这也是它主要的输出变量之一。本文设计的主蒸汽压力控制系统，其任务是维持出口处蒸汽温度在所允许的范围内，从而使得机组达到安全、经济运行。为了达到此目标，必须对整个生产过程进行控制以及监视。因此，需要先了解此生产过程的工艺流程和动静态特征，用理论分析和综合整个系统，以生产过程中的物流变化量作为被控量，采用合适的方式进行自动控制，以实现生产过程的控制目标。 在控制算法上，本论文综合运用了比值控制、串级控制、单回路控制等控制方式，实现了引风量控制炉膛负压、燃料量控制调节蒸汽压力、送风量控制调节烟气含氧量，并且有效地克服了彼此的扰动，使整个系统稳定运行。本文设计的控制系统系统运行稳定可靠。采用的计算机控制和控制系统不仅可以大大节约能源，促进环保，而且还可以提高生产自动化水平，具有电渗析模块可观的社会效益和经济效益。电解水杯
关键词： 燃烧控制；串级控制；炉膛负压；蒸汽压力
古籍扫描仪ABSTRACT
This paper mainly studies the boiler combustion system control problem. Thermal power plant boiler is the most basic and important equipment, the use of boiler is to use the output of the steam, which is also one of its main output variables. In this paper the design of the main steam pressure control system, the task of maintaining outlet steam temperature in the allowed range, so that the crew reached safety, economic operation. In order to achieve this goal, must be on the entire production process control and monitoring. Therefore, to understand the production process and the dynamic and static characteristics, using theory analysis and synthesis of the whole system, in the production process of logistics volume changes as the controlled quantity, adopt appropriate ways to achieve automatic control, production process control target.
In control algorithms, this thesis employs ratio control, cascade control, single loop control mode, to achieve the control of furnace negative pressure, fuel quantity control regulating steam pressure, air flow control of oxygen content in flue gas, and effectively oranth
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vercomes the mutual disturbance, make the system stable operation. In this paper, the design of the control system the system is stable and reliable. Using the computer control and control system not only can save energy, promoting environmental protection, but also can improve the production level of automation, and has considerable social and economic benefits.举宫
Key words： Combustion control; Cascade control; Furnace pressure; Steam pressure
