| Flue gas turbine is the key equipment of the flue gas recovery system of catalytic cracking equipment in the petrochemical industry.and it is also an important energy-saving facility.Because the flue gas is mostly dusty gas,It is very important to study the erosion resistance characteristics of blade material under multiple conditions,which improve the erosion resistance of flue gas turbine blade and ensure the safe operation of flue gas turbine.At present,the domestic and international erosion experiment platforms,especially hot wind erosion experiment platforms is rare,and the existing experimental equipments can not guarantee the reliability of the test conditions such as wind speed,temperature,solid particle concentration,etc.Therefore,the design of a new type of erosion experimental platform to simulate the actual working conditions of the blades is of great significance to improve the accuracy of the experimental study on erosion of the particle-laden gas turbine blade.The research mainly includes the following contents:(1)Designed and implementated of A new type negative pressure wind tunnel test system of heating by the air heater、variable frequency induced draft fan provides airflow power、the feed valve to add particles、Finned tube heat exchanger for cooling、LCDM-4.5 bag filter to collect experimental particles.Emphasizes on that design of system frame,Gas-solid two-phase flow delivery system,temperature control system,Design of experimental section,Hardware design of erosion test bench.(2)Generate PC monitoring system through secondary development of MCGS configuration software.IPC equipped with secondary development of the MCGS login to the serial server through the Telnet protocol.and then control the sensors,controls of the field test executive layer for experimental data acquisition and experimental system monitoring.Emphasizes on that master window configuration,device window configuration,user window configuration,real-time database configuration,running strategy configuration.In the MCGS operating environment,The following functions can be realized,Electric heater start-stop control,set the fan frequency,animation display,system status monitoring,alarm settings,parameters before the experiment input,parameters input after the test,historical data query,including a single experimental data query,all experimental data query,historical data Output and other functions.(3)On the experimental platform,studied the erosion characteristics of GH738,Erosion test was carried out at erosion particles were 200 mesh,500 mesh quartz sand,the particle erosion rate was Subsonic speed,the test temperature was 200 ℃ 300℃、400℃and 500℃ 4 different temperatures,erosion angle of 10 ～ 90 ° 9 different angles.Come to the conclusion: a,The erosion rate of GH738 is the largest between 15 ° and 30 °,and the erosion rate of 90 ° angle is the smallest.the erosion characteristic curve of GH738 material accords with the erosion rule of plastic material;b,the cumulative mass loss of the material at different angles of attack and temperature are linear with the mass of the erosion particles;c,the mechanism of SEM erosion of GH738 is analyzed.(4)Experimental testing shows that the erosion experiment system can meet Experimental study on the erosion characteristics of the subsonic gas-solid two-phase fluid which at 600 ℃ and below temperature,any temperatures,different gas-solid two-phase flow(different flow rates,different particle concentrations),different angles of attack,During the experiment,the control operation is simple,the mixing ratio of gas-solid two-phase flow is stable,the temperature of experimental section and the wind speed stability is good,the data acquisition is accurate,The experimental results have a high reliability.The application value of the experimental results of hot erosion of the particle-laden gas turbine blade is further improved. |
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