Study On Mechanical Properties And Monitoring Research Of Steel Flue Structure Under High Temperature

Flue gas pollution of thermal power plant is seriously day by day. Importance ofnitration in smoke received more and more attention. Reactor and flue in gentrificationengineering are both thin-walled steel structures, and current design often reduceselastic modulus to calculate structure deformation at high temperature. This articletake some denigrate construction as computation anatomic model, and apply finiteelement software ANSYS to carry on steel plate and overhanging structure withtransient and stable thermal analysis. Carry on monitoring to the flue and reactor, andobtain the following conclusion.(1) Apply transient thermal analysis method to analyze steel plate temperaturerise condition under normal temperature in the ambient gas after360℃. Contrasttemperature rise speed of the steel plate of different thickness. Compared to the backand central plane, the contact plane between steel plates with high temperature gastemperature elevated quickly. The thermal analysis algorithm result was smaller thanthe conventional algorithm result, about2.5％.(2) Analyze overhanging with thermal-structure coupling method, and obtain theelevation of structure temperature curves with transient analysis method. Analyzeoverhanging with different length in stable state method. Discover the stress anddistortion were rising quickly while the temperature started rising. Stress and strainstabilized gradually while time passages. The thermal analysis algorithm result wassmaller than the conventional algorithm result, about9％.(3) The reactor strain monitor’s result was slightly smaller than the simulationvalue. The reason mainly included induction disturbance, wire disturbance, and electricdisturbance. The displacement distortion monitor reading was small. The primarycause was the reactor has not yet completely withstood ash load. In addition, themeasuring error mainly included instrumental error, the installment error, and theconnection error.(4) According to this monitor result, give flue design aspect some proposals, whichincluded such as flue rigidity, support structure, heat expansion processing, andmanhole door’s processing. Put forward to advice of monitoring method and themonitor precision. Provide reference for the next step of monitor work.