Regarding the torch issue
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The outlet pressure of the flare separation tank is always high, and the liquid level in the water seal tank of the flare tower is also high. It was previously suspected that there was an obstruction inside the flare tower; attempts were made to clear this obstruction by using syngas venting, but with no success. Please suggest a solution!
Maybe the vent volume is high? Or are there issues with the instruments? If the liquid level in the water seal tank is high, it should be fine, right? As long as there’s a water seal, that’s enough, right? Or should we drain the water promptly and check?
I didn’t catch that. What question are you asking? The flare system should consist of a gas-liquid separation tube, a flare water seal tube, a flare barrel, a flare tip, a molecular seal, a permanent light and pilot burn system, an ignition device, and associated pipelines. So what exactly is the problem?
First, determine whether the liquid level in your separator tank is truly high or artificially high The level of the flare liquid separation tank is determined by assessing the increase in the liquid level in the flare water seal tank; thereafter, a large amount of water is drained from the bottom of the flare liquid separation tank. After all the water has been removed, the pressure changes are monitored. Control the liquid level in the flare water seal tank to reduce resistance; refer to the equipment drawings for the flare water seal tank to determine an appropriate range for liquid level control.
This post was last edited by pyp222 on 2017-4-5 09:30. Is the original poster using water-coal slurry or dry coal powder? During startup and shutdown venting, is it “raining” or even a “fountain” around the flare? If that’s the case, please check whether the water overflow pipeline of the water seal tank located at the bottom of the torch tower is blocked; also check the bottom sewage pipeline, which is likely to be blocked as well. If a blockage is detected, extreme caution must be exercised when dealing with it, and proper safety measures must be in place; this area is very dangerous, with a high risk of gas poisoning.
Regarding the high pressure and high liquid level, what exactly are the specific values? Could you provide some figures? Based on the description, both are too high; it might be a problem with the overflow port of the water seal tank. When discharge occurs, the liquid level fluctuates; the water seal tank automatically replenishes water, but the overflow pipe is not able to discharge excess water in a timely manner. As a result, the height of the water seal in the entire tank becomes too high, which in turn causes pressure buildup in the separation tank. The pressure at the outlet of the separation tank will definitely be high. Typically, the height of the water seal inside the tank is around 400 mm.