Boiler critical flame protection maloperation prevention regulation and control system

Abstract

The invention relates to the technical field of power plant boiler system protection, in particular to a boiler critical flame protection maloperation prevention regulation and control system. The boiler critical flame protection maloperation prevention regulation and control system is characterized that the regulation and control system detects and obtains the number of flame signals of a main coal mill; the regulation and control system obtains operation data of adjacent coal mills of the main coal mill; the regulation and control system analyzes loss data of the flame signals of the main coal mill, and combines and analyzes the operation data of the adjacent coal mills of the main coal mill; and the regulation and control system performs analysis according to the data in the S3, judges the flame combustion condition in the main coal mill, and sends out an operation execution or tripping protection instruction according to the judged combustion condition. The system has the advantages that the shielding protection is performed before the flame of the coal mill loses protection, so that the judgment accuracy of the loss condition of flame signals of the main coal mill is further improved, and the condition of protection misoperation caused by transient loss of hearth flame due to coke falling can be shielded. Therefore, the unnecessary tripping risk is reduced, and the restarting consumption is reduced.

Description

Technical field [0001] The present invention relates to the field of power plant boiler system protection technology, in particular, in particular, involving a critical flame protection against boiler. Background technique [0002] The power generation of the thermal power plant mainly converts thermal energy into electricity for thousands of households through the furnace system. At present, the furnace system needs to detect the boiler in real time during combustion, and the internal flame of the coal-coating machine is set in the boiler, the coal-coating machine, and the monitoring of the flame signal inside the furnace system is realized by detecting the point. When all flame signals of the furnace system are lost, the flame is needed to be lost, and the control system is controlled by the control combustion system to activate the trip, fire extinguishing action protection. [0003] However, when the burning process of the furnace system occurs, it occurs, at this time, the f...

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Problems solved by technology

[0003] However, during the combustion process of the furnace system, there will be occasional burnouts. At this time, the flame signal detected by the flame detection system will be temporarily lost due to burning out of coke, and it is not the actual loss of flame signal. The misoperation caused by the flame signal causes the control system to trigger the flame and lose protection, trip the coal mill, and even cause false protection actions such as boiler fire extinguishing, which will cause great losses to the power plant. The boiler is tripped due to fire extinguishing protection. After the false trip and fire extinguishing action, the process of restarting the furnace system needs to consume a lot of energy and time, and the result is not worth the candle.

[0004] In view of this, there is an urgent need for a technical solution that can effectively avoid unnecessary losses caused by misoperation caused by short-term flame loss of signal and improve the accuracy of boiler flame detection to solve the above-mentioned misoperation problem existing in the existing flame detection and protection system

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