Heat transfer simulation and thermal efficiency analysis of new vertical heating furnace

摘要

In view of the unclear heat transfer characteristics of the new type natural ventilation heating furnace designed by Liaohe Oilfield, the simulation combined calculation method is adopted. The heat transfer capacity of different components is analyzed through the flue gas temperature drop. The thermal efficiency is calculated by the positive and negative balance method combined the simulation results, and the efficiency under the different inlet temperature, the inlet flow rate and the flow rate of crude is analyzed and calculated. The results show that the designed heating furnace efficiency is over 90%, which is nearly 7% higher than that of the old heating furnace. The heat transfer effect of different components is different. The horizontal smoke pipe makes the temperature drop effect of the flue gas the most obvious, and the temperature drop can be achieved. 313?°C, is an important heat transfer component in the furnace. At the same time, no heat collection at the top of the furnace is found. Among the factors affecting the thermal efficiency, the amount of crude oil processed by the heating furnace has the greatest influence on the thermal efficiency, which can cause the efficiency fluctuation to reach 12%.