Control device and method for on-line monitoring of safety risk of four pipelines outside furnace of boiler of power station

Abstract

The invention relates to a control device and method for the on-line monitoring of the safety risk of four pipelines outside a furnace of a boiler of a power station. The control method for the on-line monitoring of the safety risk comprises the following steps: calculating the accident probability FPi of the occurrence of the leakage of four pipelines outside a furnace of a boiler of a power station; carrying out on-line monitoring on pressure signals of the water feeding pressure, the main steam pressure, the reheating steam pressure and the reheater inlet steam pressure borne by the four pipelines; carrying out on-line monitoring on a flow signal of the boiler of the power station; carrying out on-line monitoring on a reheating steam flow signal of the boiler of the power station; calculating the average overhauling time MTTRi of the four pipelines outside the furnace; calculating the dynamic safety risk sequencing number RPNi of the four pipelines outside the furnace of the boiler of the power station; evaluating the grade of the safety risk of the four pipelines outside the furnace of the boiler of the power station; determining the maximum dynamic safety risk sequencing number RPNmax of the four pipelines outside the furnace of the boiler of the power station; and adopting a risk control measure. According to the control device and the method for the on-line monitoring of the safety risk of the four pipelines outside the furnace of the boiler of the power station, the on-line calculation, the on-line monitoring and the control of the safety risk of the four pipelines outside the furnace of the boiler of the power station are realized.

Description

technical field [0001] The invention relates to an on-line monitoring and control device and method for the safety risks of four pipelines outside a power plant boiler, belonging to the technical field of power plant boilers. Background technique [0002] The four major pipes outside the boiler of the utility boiler include water supply pipes, main steam pipes, reheat steam pipes and low-temperature reheat steam pipes. The feed water pipe is the pipe between the boiler feed water regulating valve and the inlet header of the economizer. The main steam pipe is the pipe between the outlet header of the superheater and the main steam valve of the steam turbine. The reheat steam pipeline is the pipeline between the outlet header of the high temperature reheater and the reheat main steam valve of the steam turbine. The low-temperature reheat steam pipeline is the pipeline between the exhaust check valve of the high-pressure cylinder of the steam turbine and the inlet header of t...

AI Technical Summary

Problems solved by technology

The existing power plant boiler thermal protection system has online protection functions such as economizer inlet feed water pressure, main steam pressure, reheat steam pressure, reheater inlet steam pressure, etc., and there is no safety risk of the four major pipelines outside the power plant boiler. Online monitoring and control function

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