Heating furnace
Thread Content
The heating furnace we installed is a horizontal tube type, and each side of a furnace is a branch. Logically speaking, if the flow rate of the two lines is the same, the temperature should also be the same, because the two branches are symmetrically distributed on the two furnace walls of the furnace. However, sometimes when the flow rate of the two lines is basically the same, the temperature difference between the two lines can reach about eight degrees. What is the reason for this? The flow meter and thermocouple of the two lines are easy to use to prevent the flame from going to a certain way.
The problem is: ⒈The burner ignition distribution is uneven ； ⒉Flames vary in length ； ⒊Furnace insulation has different effects on both sides.
I know it’s the third result on the second floor. The insulation effect on both sides of the furnace is different.
The length of the furnace fire is different, the heat distribution in the furnace is uneven, and the temperature difference in the furnace is large.
What was said above 2 makes sense, I agree.
The second floor said it very well. I wonder if we should also consider the condition of the furnace tube and whether the structure inside the furnace tube affects the heat transfer coefficient. And if your flow rate is the same, if there is coking in the furnace tube, the flow rate of the heated oil in the furnace tube will be different, and the residence time in the furnace tube will also be different.
“"Is there any structure in the furnace tube?" is corrected to "Is there any scale in the furnace tube?"”
Whether there is gas-liquid two-phase flow, whether the inlet and outlet are arranged symmetrically, and whether there is any bias flow.
There are differences in the negative pressure, oxygen content, and air distribution on both sides.