Numerical Simulation Of The External Combustion Hot-blast Stove's Connector Tube Section

External combustion hot stove's combustion chamber independent of the regenerator, the combustion chamber connect with the regenerator by special structure of the dome connector tube, its unique structural features determine the connector tube sections is the weak link for the whole structure of external combustion hot stove. Its stability will directly affect the life of the stove, so this paper, study the external combustion hot stove of the Anshan Iron and Steel No. 4 BF as the research object, using their respective calculation strengths of FLUENT and ANSYS software, numerical simulation the flow field, temperature field and stress distribution of the connector tube section during the progress of supply air to the BF, In order to simulate the calculation can be realized, assuming that connector tube section as a whole model, so it will facilitate the simulation and makes the results close to the actual mostly.Anshan Iron and Steel No. 4 BF's capacity is 2580m3, external combustion hot stove's combustion chamber is 5.46m, regenerator diameter is 8.584m, regenerator height is 26m, and the height of hot-blast stove is 46.639m. Establish the calculation model with the physical parameters of actual, air supply volume is 5500m3/min. First, calculate the hot gas flow field and temperature field gets the temperature value of regenerator, combustion chamber dome and connector tube of the blast during the process of air supply by FLUENT software. Export the node temperature values of connector tube, as the wall temperature conditions of the model during stress calculation. then calculate the wall-temperature distribution of the connector tube section more detailed by ANSYS software, The numerical calculation results show that the crucial point of stress concentration area is the junction connector tube segment of external combustion hot stove, this forecast parameters for the future optimization design of the external combustion hot stove and safety construction has a good reference value. Maximum stress distribution is the junction of the right side pipe with the dome, the maximum is 238MPa, while other location stress is only 30 ~ 60 MPa. In addition, the maximum temperature difference is also the junction, but the difference is not large.So we can find the diffusion of heat and temperature conditions of refractory layer. Finally, calculate the stress of the stove wall structure in order to gain the dome and the connector tube section of the external combustion hot stove is the force concentrated area of the connection of external combustion hot stove.