Cocking-delaying heating furnace having lower inlet and upper out-let flow direction structure

The utility model relates to a cocking-delaying heating furnace having a lower inlet and upper outlet flow direction structure. The utility model belongs to the improvement for the technology for enlarging energy and saving energy for a cocking-delaying heating furnace in the process of processing petroleum. The positions of an inlet and an outlet of a furnace pipe in a furnace body, and the structure of a gas injection mixer are improved, which leads the direction of feed and the gas injection mode of fluid which is heated to be improved. Pressure drop is lowered, air resistance is reduced, and handling capacity of the utility model is enhanced.