人造奶油加工用刮板式热交换器换热特性模拟及设计  

Thermal equilibrium simulation and design of scraped surface heat exchanger for margarine processing

作　　者：顾锦鸿[1] 张军文[1] 李仕成[1] 

机构地区：[1]中国水产科学研究院渔业机械仪器研究所,上海200092

出　　处：《中国油脂》2016年第5期107-110,共4页China Oils and Fats

基　　金：国家科技支撑计划重点项目(2011BAD02B04)

摘　　要：以人造奶油加工用刮板式热交换器为研究对象,分析热交换器的传热机制并建立了换热的数值计算模型,采用k-ε湍流模型对热交换器中的对流换热进行了数值模拟,较好地再现了刮板式热交换器的温度分布和换热特性曲线,以此验证设计的可行性并进行改进。研究开发了以刀轴转速600 r/min、工作压力1.5 MPa、生产能力2 t/h的连续式刮板热交换器为核心设备的人造奶油生产线,对该生产线生产的人造奶油进行X射线衍射分析,结果表明其β和β'晶型符合市场要求,产品表面光洁、细腻,性能优良,说明研发设计的油脂加工装备具有良好的性能。With the scraped surface heat exchanger for margarine processing as research object, the heat transfer mechanism of heat exchanger was analyzed and the numerical calculation model of heat transfer was established. The convection heat transfer in heat exchanger was simulated by the k -6 turbulent model and the temperature distribution and heat transfer characteristic curve were reproduced well, which verified the feasibility of the design to make improvements. The margarine production line was developed with the continuous scraped surface heat exchanger as key equipment. Its operation conditions were as follows： knife shaft speed 600 r/min, operation pressure 1.5 MPa and production capacity 2 t/h. The margarine produced by the production line was analyzed by X - ray diffraction. The results showed that/3 and β＇ crystal form met the market requirements and the products had smooth and delicate surface, and excellent performance, which indicated that the margarine processing equipment developed and designed had good capability.

关 键 词：人造奶油 刮板式热交换器 换热特性 结晶 数值模拟 

分 类 号：TS225.61[轻工技术与工程—粮食、油脂及植物蛋白工程]