Jingmen Petrochemical's new coup to solve the old problem of heating furnace

In 2020, after the refurbishment and commissioning of the heating furnace 501 of the fourth sewage stripping unit of the Jingmen Petrochemical Refinery, the heat transfer efficiency will be increased from the original 83% to 94%, the exhaust gas temperature will be reduced from 220 degrees Celsius to 106 degrees Celsius, and the oxygen content will be reduced from 10%.

Reheating furnace is an important thermal energy-consuming equipment of Jingmen Petrochemical.

New materials to solve the problem of leakage point corrosion and perforation

"With new materials, there is no need to worry about the air preheater being corroded and perforated by low-temperature leakage points.

In order to eliminate the bottleneck, the company and Luoyang Technology R&D Center jointly tackled key problems, and carried out feasibility analysis and evaluation of project transformation based on the design and process characteristics of the heating furnace.

However, there are micropores in the mullite ceramic material, which affects the sealing performance, resulting in low thermal efficiency.

After the air preheater made of new materials is applied to the combined heating furnace of the ketone-benzene unit, the efficiency of the heating furnace is increased by 2.

New design to improve the heat exchange efficiency of the heating furnace

"The technology development project we have completed in cooperation with China University of Petroleum,'Southern Distillation Vacuum Heating Furnace Bottleneck Elimination Measures', will increase the crude oil processing capacity by 800,000 tons per year and reduce energy consumption.

　　With the increase of the processing capacity of the device, the furnace temperature of the decompression heating furnace continues to rise, which easily leads to the coking and deterioration of the medium in the furnace, and even damages the heating furnace.

　　"To transform the original decompression heating furnace, it is necessary to consider the overall stability of the original furnace and the layout method of the furnace tube, but also take into account the degree of integration of the newly installed parts in terms of process, equipment, and structure.

　　In January 2020, the first transformation was successfully completed, and all operating indicators of the decompression heating furnace reached the design requirements.

　　(Pu Hongxia)