银川能源学院
成绩 化工原理课程设计说明书
题目：年处理量15×104t/a煤油冷却器的设计
学生姓名 学 号 指导教师 院 系 专业班级 设计时间
化学工程教研室制
摘 要
本课题是年处理量15×104t/a煤油冷却器的设计，煤油入口温度为140℃，出口温度为40℃；冷却水入口温度为30℃，出口温度为40℃。两流体温差大，为实现物料之间热量传递的节能，故选用了固定管板式换热器。并选用双管程，单壳程且煤油走壳程，冷却水走管程的换热器。本设计先确定了设计方案和物性数据，通过估算传热面积来算工艺结构尺寸，选用了管径为?25mm?2.5mm的碳素钢管、确定使用传热管总计228根和壳体内径为600mm。然后进行换热器核算，最终验证了传热系数、有效平均温差39.09℃、流体流动阻力、面积裕度19.0%和压降等都在合理范围内。通过计算可得出本设计的正确性后，进行筒体、管箱、管板、法兰、折流板及其它设备进行计算和选型，并进行必要的校核。最后运用CAD制图软件进行装配图和工艺流程图的绘制。
关键词：固定管板式；面积裕度；压降
银川能源学院化工原理课程设计说明书
Abstract
This topic is the design of the handling capacity of 15×104 t/a of kerosene cooler, kerosene entrance temperature of 140 degrees centigrade, the outlet temperature is 40 degrees centigrade; cooling water entrance temperature of 30 degrees centigrade, the outlet temperature is 40 degree Celsius. Two fluid temperature difference, to achieve energy-saving heat transfer between the materials. So the selection of the fixed tube plate heat exchanger. And the double, single shell and kerosene go shell cooling water, go pipe heat exchanger process. This design to determine the design scheme and material data, by estimating the heat transfer area to calculate process structure size, choose diameter of carbon steel , determined using the heat transfer tube of a total of 228 root and the inside diameter of the shell is 600 mm. and heat exchanger calculation, the final validation of the effective heat transfer coefficient, average temperature of 39.09 degrees centigrade, fluid flow resistance, area 19% margin and pressure drop are within a reasonable range can be obtained by calculation. The correctness of the design, for the cylinder, tube box, tube plate, baffle and flange. Other equipment calculation and selection, and carry out the necessary verification. Finally using CAD drawing software drawing assembly drawings and process flow chart.
Keywords:Fixed tube plate; area margin; pressure drop