仪表电伴热在炼油化工企业中的应用

Application of Alectric Heating Instrument in Refi nery and Petrochemical Enterprises

我国炼油化工企业目前大多沿用的是传统的蒸汽伴热系统,蒸汽伴热自动化控制程度低,热量转化率低,且与之相配套的配套设备庞大复杂,维修成本高,效率低下。电伴热已经全面代替了蒸汽伴热,电伴热发热温度梯度小,功率大,作用时间稳定长久,而且可以实现数字化、远程化、自动化控制,设备安装容易,使用寿命长,无污染物排放等众多蒸汽伴热无法实现的优点,已被我国重点推广。电伴热技术经过多年的沉淀与发展,已经由起初的恒功率型电伴热发展到新型的以半导体为主的自控温型电伴热,其控制精度越来越高,应用范围越来越广。本文介绍了仪表电伴热在炼油化工企业中的应用,希望对炼油化工企业在仪表电伴热的建设有参阅价值。

Heat tracing is regarded as a very effective instruments, piping heat insulation antifreezing measures in various types of chemical enterprises is widely in use for many years, its working principle is produce media heat transfer to the need to be heating instruments, piping, in order to make the instrument work correctly in a cold environment. Electric heat tracing has been fully replaced the steam heating, electric heating heating temperature gradient is small, high power, stable long-term action time and realize the digital, remote and automatic control, equipment easy to install, use the advantages of long service life, no discharge of pollutants, such as many steam heating can not be achieved, has been the key popularized. Electricity companion thermal technology after years of sedimentation and development has by initially constant power type electric with the development of thermal model of semiconductor based automatic temperature control type electric to heat tracing, the control accuracy is higher and higher, application more and more widely. This paper introduces the instrument electric heat tracing in refining and chemical enterprises in the application, hope of refining and chemical enterprises in electric meter with the construction of a thermal have reference value.