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在精馏塔设计中,计算理论塔板数的方法有图解法、逐板计算法和简捷法等,其中图解法因快捷直观而常被使用。图解法用于精馏塔设计,通常与MATLAB、AspenPlus、CAD、Excel等软件结合使用。在其设计过程中,先根据较有限的气液平衡数据和方程绘制相应的曲线,这样可能会造成一定的误差且曲线的光滑度也较差,从而导致精馏塔理论塔板数的计算精度不高。为提高其精度,本文采用数值分析方法——分段抛物插值法对二元理想体系的气液平衡曲线进行模拟,并结合MATLAB软件和图解法对精馏段操作线、q线和提馏段操作线进行数值计算和绘制曲线以计算精馏塔理论塔板数,从而完成精馏塔的设计。文中选用苯-甲苯物系作为应用实例,计算得出其q点坐标为(0.3626,0.5495),该物系的理论塔板数N为13.3739块(包括再沸器),其中第6.3589块板为加料板。 相似文献
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研究了水溶性杀菌剂BCT-2保存浓缩天然胶乳的效果及对预硫化胶乳粘度、成膜特性、硫化胶膜干燥特性及力学性能的影响。结果表明,浓缩天然胶乳保存6个月以上的挥发性脂肪酸值最高为0. 048,要比GB/T 8289—2016的0. 06低,粘度和p H值也都符合应用的要求。预硫化胶乳的粘度在放置前6 d没有太大变化,不影响预硫化胶乳的基本性能,且成膜性能好;与传统高氨保存的硫化胶膜相比,BCT-2保存的硫化胶膜干燥时间短,干燥速率常数提高了5~6倍; BCT-2保存的硫化胶膜的拉伸强度变化不大,而撕裂强度为49. 31 k N/m。 相似文献
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The performance of a rotating packed bed (RPter solutioB) with three kinds of packings was investigated using alcohol/wan under continuous distillation conditions at atmospheric pressure. The effects of average high gravity factor (β), reflux ratio (R), and feedstock flux (F) on mass-transfer in distillation were examined separately. Experimental results indicated that the total number of theoretical units (NTU) of RPB increased with β, R, and F.Of the three kinds of packings, the wave thread packing of stainless steel (Packing-Ⅲ)-had the best mass transfer efficiency with the height equivalent of a theoretical plate (HETP) of approximately 7.35 mm- 23.58 ram, whereas the corrugated disk pacing of stainless steel,(Packing Ⅰ) had the worst one with the HETP of about 13.4 mm-48.07 mm.Correlations were cleveloped to describe the mass transfer efficiency for packings Comparing.experimental data with the data calculated by correlation, the average deviate obtained for each packing was 0.72%, 1.98%, and 2.7%, respectively, implying that the accuracy of correlations developed was reasonable. 相似文献
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以不锈钢波纹丝网为填料,应用超重力减压精馏间歇全回流操作分离乙醇/水共沸物系。考察了进料乙醇质量分数xf为50%~95%、操作压力P为101.33~11.33kPa和超重力因子β为20.90~130.64时乙醇-水体系的传质性能。实验中设备运行稳定并且单级旋转精馏床传质性能随着超重力因子β的增大先增强后减弱,随着压力P的减小和进料浓度xf的增加而增强,并在P=11.33kPa时分离高浓度原料时打破共沸点。与相同条件下传统填料塔相比,分离效果明显高于传统塔,且HETP为7.94~14.20mm,仅为传统塔的1/6~1/4,传质性能显著增强。并对能耗进行分析,超重力装置由于自身体积小等优点便于达到所需真空度,能耗降低明显。 相似文献