Method and device for predicting thickness of tube wall of water cooling wall in furnace and readable storage medium

Abstract

The invention provides a method and a device for predicting the thickness of a tube wall of a water-cooled wall in a boiler and a readable storage medium. The method comprises the following steps: collecting a reducing atmosphere parameter c of the wall surface of the water-cooled wall, the sulfur content St of combustion coal and the temperature T of the tube wall of the water-cooled wall when the boiler operates in a hot state; during at least two times of furnace shutdown overhaul, the pipe wall thickness h is collected, and the corresponding unit operation time t is recorded; establishing a mathematical model, and constructing a function relationship of the pipe wall thickness variation delta h: delta h = f (c, St, T, t); and the operation parameters are substituted, and the subsequent pipe wall thickness variation is predicted. According to the method, the reducing atmosphere parameters, the pipe wall temperature and the like on the water-cooled wall in the furnace are collected, the collected data are used for analysis, the model is established, the function expression of the wall thickness variable quantity of the water-cooled wall is established, the change of the pipe wall thickness of the water-cooled wall in the furnace is predicted, then the work of overhaul maintenance or pipe replacement is guided, the working efficiency of inspection is improved, and the detection accuracy is improved. And the maintenance workload is reduced.

Description

technical field [0001] The invention relates to a technology for detecting the wall thickness of a water-cooled wall of a boiler, in particular to a method, a device and a readable storage medium for predicting the wall thickness of a water-cooled wall in a furnace. Background technique [0002] With the continuous promotion of national ultra-clean emissions, NO x The further reduction of the emission concentration brought serious high-temperature corrosion problems in the furnace, which in turn caused serious thinning of the water-cooled wall tube wall in the furnace. At present, in view of the thinning of the water-cooled wall pipe wall, it is mainly to use the opportunity of unit shutdown to set up scaffolding or lifting platform to enter the furnace for thickness measurement and inspection, which increases the maintenance cost and construction period cost. When the maintenance cycle is tight Or when there is insufficient manpower, it is often only possible to carry out ...

AI Technical Summary

Problems solved by technology

[0002] With the continuous promotion of national ultra-clean emissions, NO x The emission concentration is further reduced, which brings serious high-temperature corrosion problems in the furnace, which in turn causes serious thinning of the water-cooled wall tube wall in the furnace.

At present, in view of the thinning of the water-cooled wall pipe wall, it is mainly to use the opportunity of unit shutdown to set up scaffolding or lifting platform to enter the furnace for thickness measurement and inspection, which increases the maintenance cost and construction period cost. When the maintenance cycle is tight or when there is insufficient manpower, it is often only possible to conduct thickness measurement and inspection in some areas, which has caused hidden dangers for the safe operation of the unit.

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