直立分室式流体连续通电加热系统的试验研究
Experimental Study on the Continuous Ohmic Heating System with Vertical Compartments for Liquor
作者：孙玉利(南京航空航天大学 机电学院， 江苏 南京 210016)；左敦稳(南京航空航天大学 机电学院， 江苏 南京 210016)；李法德(山东农业大学 机械与电子工程学院，山东 泰安 271018)
Author：(College of Mechanical and Electrical Eng., NUAA, Nanjing 210016, Jiangsu China)；(College of Mechanical and Electrical Eng., NUAA, Nanjing 210016, Jiangsu China)；(College of Mechanical and Electronic Eng., Shangdong Agricultural Univ., Tai’an 271018, Shandong China)
收稿日期：2006-01-20 年卷（期）页码：2006,38(6):148-152
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：直立分室式；通电加热；连续流动；电导率
Key words：vertical compartment mode; ohmic heating; continuous flow; electrical conductivity
基金项目：山东省自然科学基金项目(Y2003B01)
中文摘要
设计制作了直立分室式流体连续通电加热系统并利用该系统对豆浆(固形物含量为6.01%,流量为(75 ±0.5) kg/h)进行了试验研究。试验结果显示，该系统能实现流体的连续加热，整个通电加热装置内豆浆的温度自下而上按加热室分段均匀上升，加热过程稳定，系统运行状态良好。通电加热过程中，在流动状态下豆浆的电导率与温度的关系为线性关系。但是，在相同温度下利用连续通电加热装置测得的流动豆浆的电导率小于利用静态通电加热装置测得的静止豆浆的电导率。其主要原因是豆浆在连续通电加热装置的极板表面上形成了焦煳层。
英文摘要
A continuous ohmic heating system with vertical compartments for liquor was designed. The soybean milk ( with the solid content of 6.01% and (75 ± 0.5) kg/h the mass flow rate) was heated with the system. The results showed that the temperatures of tap water and soybean milk increase evenly within each ohmic heating compartment from the bottom to the top. The heating process is stable . The electrical conductivity of the soybean milk during continuous ohmic heating increases linearly with its temperature. However, the value of the electrical conductivity measured with the continuous ohmic heater is lower than that measured with the batch ohmic heater at the same temperature during ohmic heating. The reason is that the fouling occurred on the surface of the electrode in the continuous ohmic heater.
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