Design And Simulation Of Corrosion Probe Measurement System

Biomass boilers use organic materials such as wood,agricultural waste or plantderived materials as fuel,so that the flue gas produced by the combustion of fuel in biomass power plants contains a large amount of Cl.S and alkali metal elements,so the superheater is exposed to biomass fuel for a long time In the flue gas environment produced by combustion,corrosion problems will arise.Corrosion monitoring is of great significance in industrial equipment.which can effectively prevent and reduce equipment damage and downtime.Corrosion monitoring is to understand and understand the cause of equipment corrosion.It is a very effective means to guide anticorrosion work through the results of corrosion monitoring.which can effectively avoid property losses and personal accidents due to corrosion.The paper takes the resistance corrosion probe as the research object,focuses on the principle of resistance measurement of the Wheatstone bridge in the resistance corrosion probe,and introduces the use principle of the variable resistance digital potentiometer X9241,single-chip microcomputer and other components.In the design part of the resistance corrosion probe,the paper carried out the overall design of the resistance corrosion probe.the design of the corrosion components to be tested and the circuit design of each module,and carried out the production of circuit diagrams and printed circuit boards.and optimized the probe measurement end Design and layout,and carry out sample programming test of singlechip microcomputer.In this paper,COMSOL software is used for simulation modeling,and the simulation of corrosion depth and resistance change of corrosion probes is carried out through basic equations,initial conditions and boundary conditions.The software simulates the corrosion of the corrosion probe at 800℃ and 1000℃ for 0-1000 hours,and shows the simulation results.It is concluded that the corrosion depth can reach more than 2mm under the corrosion effect of 1000 hours at the two temperatures depth,and analyze the phenomena present in the results.Finally.in order to verify the validity and accuracy of the resistance corrosion probe in the test,the resistance corrosion probe measurement circuit was modeled in the software,and the accuracy of the resistance corrosion probe measurement results based on the Wheatstone bridge principle was verified.Accuracy.when the corrosion depth is greater than 4mm.the conclusion that the resistance of the probe increases exponentially provides a reference for the selection of the resistance value of the bridge arm of the resistance probe measurement system.and also provides a basis for the development and application of corrosion monitoring technology.Useful reference.