【摘要】 本文通过理论分析,得到了利用反应热提高苯酐收率的方法。现场测试验证了该方法的可行性。应用实践表明,该法可使苯酐的平均收率提高3～5％。更多还原

【Abstract】 For a fluidized bed in the production of phthalic anhydride, the fixed bed construction and a given catalyst activation will determine the relationship between the conversion rate of the product and the reaction heat plotted as a curve. The variation of technological conditions such as the temperature, the pressure, and the height of the moving bed will only make the system operating point shift along the curve and nothing will happen to the curve itself. It has been found that there exists on the curve a conversion rate limit point where the reaction heat is nearly stable. Therefore, it is suggested that reaction heat be used as a criterion for the optimization of the conversion rate. To achieve optimal control, the reaction heat is to be measured in real time and to be kept around the value corresponding to the limit point of the conversion rate by adjusting the reaction temperature with a microcomputer. The scheme has been put into actual operation in a Resin Factory and the average conversion rate is found to have been increased by 3 to 5 percent.更多还原