Analysis and Optimization of Heat Exchange Network in Hydrogenation Unit

Hydrogenation technology has many advantages in light and clean oil products, and has become the most reasonable and effective key technology in the refining industry. However, the hydrogenation reaction process is high temperature, high pressure and hydrogen operation, which consumes a lot of fuel and power, and the energy consumption of the unit is high. Through pinch analysis, the violators of pinch points are identified, and the heat exchange process of the existing hydrogenation unit is optimized and adjusted. Reasonably distribute the heat exchange load of mixed hydrogen oil and low-content oil, improve the final heat exchange temperature of mixed hydrogen oil, reduce the heating load and fuel consumption of heating furnace, strengthen the recovery of inefficient low-temperature potential heat, advance to the design of maximum energy recovery (MER), realize the optimization of cold utility and hot utility, and effectively reduce the energy consumption of hydrogenation unit after optimization. The optimization of heat exchange network of hydrogenation unit significantly improves economic and social benefits.