Circulating fluidized bed boiler bed temperature event-driven control system based on state feedback

Abstract

The invention relates to a circulating fluidized bed boiler bed temperature event-driven control system based on state feedback. The event-driven control system comprises a circulating fluidized bed boiler, a data collection and storage device and a controller. The circulating fluidized bed boiler comprises a sensor and an actuator. The data collection and storage device is used for collecting and storing data related to bed temperature control of the circulating fluidized bed boiler. The controller is connected with the data collection and storage device and receives the data transmitted and collected by the data collection and storage device. According to the received data, the controller generates a primary air volume instruction and transmits the primary air volume instruction to the actuator in the circulating fluidized bed boiler so that the accuracy and the stationarity of primary air volume control can be achieved. According to the circulating fluidized bed boiler bed temperature event-driven control system based on the state feedback, on the basis that the bed temperature of the circulating fluidized bed boiler can be effectively adjusted, through reasonable parameter adjustment, the data communication traffic among the sensor, the controller and the actuator is decreased, and network information congestion is relieved.

Description

technical field [0001] The invention belongs to the field of process control of thermal power generating sets, in particular to an event-driven control system for bed temperature of a circulating fluidized bed boiler based on state feedback. Background technique [0002] Circulating fluidized bed boilers have many technical advantages such as wide fuel adaptability, strong low-load stable combustion capability, desulfurization in the furnace, and high combustion efficiency. They have been widely used in my country's thermal power industry. As a unique process parameter of circulating fluidized bed boilers, bed temperature has a direct impact on the safety and stable operation of boilers, and also determines the denitrification (NO x ) and desulfurization (SO 2 ) is a key factor in the effect. If the bed temperature is too low, the combustion efficiency of the boiler will decrease, the combustion will be unstable, and even the fire will be extinguished; if the bed temperatu...

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Problems solved by technology

However, at present, event-driven control is mostly in the theoretical research stage, and there are no mature engineering application examples. The main reasons are its complicated design process and adverse effects on the performance of the original control system.

[0006] In view of the high quality requirements of CFB boiler bed temperature control and the frequent actions of primary air volume control caused by various disturbance factors, it is necessary to apply the event-driven control idea to develop a CFB boiler bed temperature event based on state feedback. drive control system

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