Research on optimization and whole process of heat treatment of main absorber by genetic algorithm
In order to clarify the effect of heat treatment of the main absorption tower and temperature distribution and heat transfer characteristics of the tower wall,a thermal-flow coupling model was established with the main absorption tower as the object,and the whole process of heating-insulation-cooling in heat treatment was simulated.The concept of heating uniformity was proposed,and the influence of inlet flue gas parameters on heating uniformity during heat treatment was analyzed by combining multi-objective genetic optimization algorithm,and optimal heat treatment process technology was obtained.The results show that during heat treatment,high temperature zone and low temperature zone of the wall are located at head and manhole,and heating rate and wall temperature difference are positively correlated with the flame height and the angle of the outer flame surface.Heating rate is positively correlated with the flue gas flow rate.Temperature difference decreases first and then increases.The whole process of heat treatment takes 32.43 h,heating rate is 34.17-74.34 ℃/h,cooling rate is 15.60-31.57 ℃/h,average wall temperature at the end of heating stage is 606.62 ℃,maximum wall temperature difference is 106.07 ℃,wall temperature difference at the end of the insulation stage is 15 ℃,and maximum wall temperature difference in the cooling stage is 111.01 ℃.The wall temperature fully meets the requirements of heat treatment regulations,which proves that the optimization goal of temperature uniformity can effectively design and optimize the heat treatment process of the main absorption tower.
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