The oil-rich temperature in the outlet tubular furnace cannot be increased
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Previously, about 500 m3 of gas was sufficient to keep the temperature of the rich oil at 180–184 degrees; yesterday, however, 700–730 m3 of gas were required to achieve the same temperature range of 177–179 degrees. The temperature readings of the rich oil taken on site were essentially the same as those transmitted remotely. Not much water came out at the gas flame arrester either. What could be the reason for this?
What is the damper opening degree? Is the burner clogged?
Observe the combustion status through the fire viewing port, adjust the damper opening, and control the combustion flame.
In addition to the above, is the oil-rich gas inlet lower compared to before? Moreover, changes in the type of coal can lead to variations in the calorific value of the gas. My experience also tells me that different wind directions can sometimes cause changes in the temperature of the oil-rich gas at the outlet
What the experts above have said makes a lot of sense. I would like to add one more point: poor control over the heating temperature and oil washing quality can lead to coking in the oil-rich pipelines, which very easily results in an increased consumption of gas for combustion, while at the same time preventing the temperature of the oil-rich mixture from rising! ~
Both make sense: to summarize； Please have the original poster conduct a comprehensive analysis: 1. The oil-rich temperature in front of the tubular furnace; 2. Whether there are any changes in the composition of the gas; 3. The opening degree of the air valves; 4. The burners. Additionally, consider the following points: 1. The suction force inside the furnace chamber; 2. The temperatures in the convection zone and radiation zone; 3. The pressure of the gas. Note: Gas pressure has a certain influence on the flame height. 4. The temperature and quality of steam entering and exiting the tubular furnace. Note: If the steam temperature is low or contains water, it will absorb more heat than before, thereby affecting the heating of the rich oil feed.