High temperature corrosion on-line monitoring system for boiler water-cooled wall

Abstract

The invention discloses a boiler water-cooling wall high-temperature corrosion online monitoring system, comprising a sampling system and a sampling control and disposing system, wherein, the sampling system comprises a fume sampling probe pipe; a fume sampling probe heat-preservation box of a temperature control device is arranged behind the fume sampling probe pipe; an electric heating pipe and a quick cooling device are connected behind the probe heat-preservation box; two branches are connected behind the electric heating pipe and the quick cooling device, wherein, one branch is a fume branch and the other branch is sequentially connected with a sample air separation electromagnetic valve, a sample air sampling pump, a calibration / sampling three-way electromagnetic valve, a 0.1Mum ceramic filter, a sample air adjusting needle valve, a flowmeter and a fume analysis gauge; the sampling control and disposing system comprises a PLC which can control the running of the sampling system, a data collector which is connected with the fume analysis gauge by a data wire and an industry control machine which is connected with the data collector by the data wire. The boiler water-cooling wall high-temperature corrosion online monitoring system can achieve the object of online monitoring the high-temperature corrosion speed of the boiler water-cooling wall and provides safety evaluation basis of the heated surface for the combustion optimization of the boiler.

Description

technical field [0001] The invention relates to a monitoring system, in particular to an on-line monitoring system for high-temperature corrosion of boiler water walls. It belongs to the technical field of electric power and power engineering. Background technique [0002] The purpose of boiler high-temperature corrosion monitoring is to determine the high-temperature corrosion rate of the boiler water wall, and reasonably configure the boiler combustion parameters to prevent the water wall from bursting. [0003] The high-temperature corrosion rate of the water-cooled wall refers to the speed at which the wall thickness of the water-cooled wall decreases under the high-temperature flue gas atmosphere when the boiler is running. When the wall thickness decreases below the safe strength, the corresponding water-cooled wall tube must be replaced. The existing technology for monitoring the high-temperature corrosion rate of the water-cooled wall is generally to measure the wal...

AI Technical Summary

Problems solved by technology

Its disadvantage is that the real-time high-temperature corrosion rate cannot be known during boiler operation, and the CO and SO 2 、H 2 The concentration of S and other gases should be reasonably allocated to the amount of combustion oxygen and other operating parameters to reduce the high-temperature corrosion rate of the boiler and prevent the water-cooled wall from bursting

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