Abstract: The upgrading and efficiency improvement of heating furnace is significant to the green and low-carbon operation of oil and gas gathering and transportation pipeline. Taking Weijing Line transporting 2,949 t/d of three-high crude oil (refers to crude oil with high wax content, high freezing point and high viscosity) as an example, this paper analyzes the transformation effects of pipeline heating furnace in detail from the aspects of oil properties, heating furnace working principles and furnace efficiency. The results show that compared with the traditional direct heating furnace, the vacuum phase change furnace has an increased efficiency of 12% and the average unit consumption of such furnace is reduced by 0.098 m³/t, which results in annual cost saving of 371,500 yuan. In addition, the annual emission of waste gas is reduced by 1.12 million m³, and the carbon dioxide equivalent (CO₂e) emission is reduced by 236 t. The goal of low-carbon emission reduction has been achieved by the transformation of heating furnace.

Key words: vacuum phase change heating furnace, oil and gas gathering and transportation, heat efficiency, low-carbon emission reduction