关键词: 制氢转化炉, 炉膛温度场, 负压, 烟气流量

Abstract: Taking the top fired steam reformer as the object, the distribution law of flue gas temperature in radiation furnace is studied. The CFD software is used to simulate the radiant box, and the conclusions are compared with the actual measurement data. The results show that the flue gas temperature in the flame length area of the burner is the highest, which is consistent with the highest point of the tube wall temperature. In the middle section of the radiant box height, the flue gas deviates obviously from the periphery of the box to the center, and the temperature of the flue gas in the periphery is low. The peak of the tube wall temperature is easy to occur in the middle and upper part of the radiant box center area. The flue gas distribution uniformity is slightly better when the negative pressure at the outlet of furnace flue gas is too high. When the negative pressure of flue gas outlet is larger, the uniformity of flue gas distribution is slightly better. When the opening area of the side wall of the tunnel is the same, the flue gas distribution is more uniform when the cross-sectional area of each tunnel is equal.

Key words: hydrogen reformer, furnace temperature field, negative pressure, flue gas flow