How to fix a leak in the heating coil of a torch tank?
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The heating coil in the flare discharge tank is heated using low-pressure steam, with the aim of ensuring that the heavier components in the tank vaporize and can be discharged through the flare lines for combustion. Observation: The liquid level in the tank rises rapidly at night. Analysis: A high liquid level indicates a need for regular drainage; the liquid discharged is water that is either free of oil or contains very little oil. When the heating steam is stopped, condensate is drained from the condensate drain point, and a small amount of non-condensable oil is discharged continuously. It is suspected that there is a leak in the heating coil. However, it is not possible to isolate the tank in order to repair the leak. Are there any other solutions, or methods for repairing the leak while the system is still in operation?
Based on the information provided by the poster, the proportion of water vapor in this torch system is relatively high; therefore, the liquid separation tank mainly contains condensed water； That steam coil is primarily used to prevent condensation water from freezing in winter, rather than to heat water for evaporation into the flare gas. The water in the separation tank is either pumped out using a pump ； Otherwise, discharge it on-site, being careful not to let the liquid level cause the flare gas to escape; this approach is generally not recommended!
Poster: Has there been any change in the pressure inside the tank? If there is a leak in the coil, steam will enter the tank, causing a change in pressure and also affecting the combustion performance of the flare. If it is indeed a coil leak, it is difficult to handle (it cannot be removed). 1. The coil inside the tank can be disabled, and a heating coil (or jacket) can be reinstalled outside the tank along with insulation; this will also meet the production requirements. Repair or replace the coil inside the tank once the conditions are met.