Material returning fault self-healing control system for circulating fluidized bed boiler

Abstract

The invention discloses a material returning fault self-healing control system for a circulating fluidized bed boiler. The system is characterized by comprising an input signal processing unit, a regulating unit, an output signal processing unit, an operation output processing unit, a left side material discharging temperature, a right side material discharging temperature, a left side material returning wind actuator and a right side material returning wind actuator. When the difference between the left side material discharging temperature and the right side material discharging temperature exceeds a certain threshold value, the condition that a material returning fault exists on one side with low temperature is judged; in a fault mode, a temperature difference regulator outputs a regulation signal to increase the opening of one side material returning wind actuator which is in a material returning fault state until the fault is eliminated; and after the fault is eliminated, the opening of the side material returning wind actuator is recovered to the original value before the fault appears, the temperature difference regulator actuates output tracking, thereby realizing the undisturbed switching of the control system.

Description

technical field

[0001] The invention relates to a circulating fluidized bed boiler operation failure self-healing control system, in particular to a circulating fluidized bed boiler return material failure self-healing control system. Background technique

[0002] Circulating fluidized bed combustion technology is a clean coal combustion technology recognized at home and abroad. Circulating fluidized bed boiler has unique advantages such as wide fuel adaptability, low cost of desulfurization in the furnace, less pollutant discharge, high combustion efficiency, large load regulation ratio and comprehensive utilization of ash, and has become the most successful clean combustion technology in the practical process. At present, the power industry is developing rapidly in the direction of industrialization and large-scale.

[0003] When the circulating fluidized bed boiler is in operation, the function of the feeder is to transport the circulating ash separated by the separator ...

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