热媒炉洗炉和导热油再生可行性研究

在管道输送原油的间接加热中,作为热媒的导热油长期在高温下使用,必然会发生老化变质。变质的导热油酸值增大,胶质增多,对管道产生腐蚀作用;胶质、沥青质附着在管壁上会降低加热炉的传热效率,严重时可引起炉管结焦、穿孔。要改变这种状况,就要对报废的导热油进行更换。在阐述导热油的老化机理、报废指标和检测内容的基础上,为了降低置换新油的费用,提出了建立流动的导热油再生装置的设想。试验室试验结果说明,对导热油进行再生和用导热油洗炉可降低成本,且再生油质量优于新油。

Flushing of Heat Medium Heater and Feasibility Study for Regeneration of Heat Conducting Oil

When heating indirectly the crude oil transported in pipeline, heat conducting oil, the heat medium, working always at high temperature, is bound to age and deteriorate. The deteriorated heat conducting oil, having higher acid value and gum cotent, may result in corrosion to pipeline, gum and asphaltenic deposit on pipe wall which may lead to decreased heater transmissibility of heat, even coking and punctures. In this case, the abandoned heat conducting oil has to be replaced. While the aging mechanism for heat conducting oil is described, a tentative idea is put foreward that travelling device for heat conucting oil regeneration shall be installed. Experimental tests show that lower costs and better oil quality can be realized by regenerating heat conducting oil and flushing the heater with the heat conducting oil.