锅炉汽包液位控制系统与连锁保护设计

汽包水位是工业锅炉安全、稳定运行的重要指标,汽包水位控制通过计算机控制对锅炉的自动检测、自动控制、自动诊断,实现集中监控和操作。通过分析锅炉的自动控制系统的工作原理,按照工程设计的具体步骤,设计了锅炉汽包液位控制系统的电气连锁保护,采用三冲量水位控制系统,以锅炉水位为主控信号,蒸汽流量为前馈信号,给水流量为控制器的反馈信号。通过PID控制,使锅炉水位维持在正常的范围内,当水位超限,能及时报警并采取措施。 The water level of the steam bag is an important indicator of the safe and stable operation of industrial boilers.Control of the water level of the steam bag could ensure the safety,stability,and economic operation of boilers through computer control of automatic inspection,automatic control,automatic diagnosis,and centralized monitoring and operation. Improving sensitivity and steam quality,reducing equipment loss and operating loss,and ensuring the operation of the entire network security could also reduce the labor intensity of staff.By analyzing the working principle of the automatic control system of the boiler,according to the concrete steps of the engineering design,the electric chain protection of the boiler's liquid level control system was designed,and the three-impulse water level control system was designed,and the boiler water level was the main control signal.Through PID control,boiler level keeps normal range,and it can raise the alarm and take measures timely when water level is overlimit