摘要
为减少能源损失,满足生产工艺需要,炼厂内的大量管道都包覆了保温层。确定保温材料与保温层经济厚度是降低管道运行成本的重要问题,针对炼厂内的高温架空管道,建立了以保温层厚度为决策变量,外表面温度及保温效率为约束条件,年管道总费用最小为目标的管道保温层优化配置模型。以华南地区某炼油厂一条保温管道为例进行了优化研究,优选出年热力费用与投资费用总和最小的保温材料仍为现有材料岩棉,但确定的经济厚度为120 mm,较原来的150 mm厚度减少30 mm。基于不同外表面温度下保温层厚度与散热量的关系,以及不同材料的保温层厚度与保温效率的关系,可根据管道运行实际情况及保温材料类型,设定适宜的最高表面温度和保温效率进行计算,从而得到最适宜的保温层。
In refineries, insulating layers are often applied to pipes in order to reduce energy loss and meet the process requirements. Definition of economic thickness of insulating materials and insulating layer is essential for reducing the pipe operation costs. In this paper, an optimization model of insulating layer for high-temperature overhead pipes in refineries is established, which considers insulating layer thickness as decision variable, outside surface temperature and insulating efficiency as constraints, and minimum annual pipe expenses as target. Taking the pipe in a refinery in South China as an example, its insulation optimization is discussed, showing that the current rock wool is still a kind of insulating materials with the lowest sum of heat loss cost and investment expense, but the economic thickness defined is 120 mm. The relations between insulating layer thickness and heat loss at different outside surface temperatures and between insulating layer thickness and insulating efficiency for different materials are identified, and calculation is made by setting proper maximum surface temperature and insulating efficiency depending on actual pipe operations and types of insulating materials. Accordingly, the optimum insulating layer is obtained.
出处
《油气储运》
CAS
北大核心
2015年第1期104-106,共3页
Oil & Gas Storage and Transportation
基金
广东省产学研资助项目"化工输送管道隔热保温涂料的开发研究"
2012B091100073
关键词
管道
保温层
优化
经济厚度
外表面温度
保温效率
pipe
insulating layer
optimization
economic thickness
outside surface temperature
insulating efficiency
