Monitoring system and monitoring method for soot on boiler convection heating surface

Abstract

The invention discloses a monitoring system and a monitoring method for soot on a boiler convection heating surface, which belong to the technical field of fuel burning on-line monitoring. A plurality of pairs of sound wave generators and sound wave receivers are installed on corresponding conduits on the peripheral plane of a boiler water-cooled wall, signal output of the sound wave receivers is connected with a signal regulator, the signal regulator is connected with a junction box through a data line, and the junction box is connected to a main machine programming controller through an input / output device. The monitoring system for the soot on the boiler convection heating surface is based on acoustical temperature measurement and a neural network. The monitoring system and the monitoring method for the soot on the boiler convection heating surface are respectively applied to the neural network and a data base, potential heat absorption capacity during cleaning of the boiler convection heating surface is predicted through the neural network, a data base system reads data in a data acquisition station (DAS) of a power station in fixed time, and finally a soot structure is conveyed to a main machine interface. The state of soot formation or slag build-up on the boiler heating surface can be timely learned, measures are taken in real time, normal running of a thermal generator set boiler is guaranteed, the running is safe, and accidental boiler shutdown accidents are avoided.

Description

technical field [0001] The invention belongs to the technical field of fuel combustion online monitoring, and in particular relates to a boiler convection heating surface dust monitoring system and monitoring method. Specifically, the boiler convection heating surface dust monitoring method is based on the combination of acoustic temperature measurement principles and neural network algorithms. . Background technique [0002] The boiler of the thermal power unit is in normal operation. When the fuel is solid fuel (such as coal) or liquid fuel containing ash, the molten or partially melted sticky particles entrained by the high-temperature flue gas collide with the furnace wall or heating surface, causing slagging. Ash particles with a temperature lower than the melting point of the ash deposit on the heating surface and cause ash accumulation. Once ash accumulation or slagging is formed on the heating surface of the boiler, the heat transfer capacity of the heating surface d...

AI Technical Summary

Problems solved by technology

The power plant cleans the soot on the convective heating surface of the boiler through regular and quantitative soot blowing. This method often makes the soot blowing on the heating surface too frequent or insufficient.

Too frequent soot blowing will not only waste the working fluid used for soot blowing, but also increase the mechanical fatigue and thermal fatigue of the heating surface, and reduce the life of the heating surface; Difficult to remove slag layer formed on the heating surface

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