Corrosion issue at the bottom of the stabilizer tower
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This post was last edited by leisure929 on 2010-3-6 at 08:14. The absorption and desorption towers used in the stabilization section employ coarse stones as absorbents (usually heavy naphtha, with a relatively low sulfur content), which results in hydrogen sulfide levels at the bottom of the stabilization tower exceeding the specified design limits in ppm. Are there any good solutions?
Be sure to check for leaks regularly; after shutting down the system, pay special attention to the risk of hydrogen sulfide self-ignition. Maintain a stable humidity level in the system by spraying water frequently.
The key issue with 2# lx_drq is that it wasn’t taken into account during the initial design of the equipment – the sulfur content at the bottom of the tower is so high; the wrong material was used! Stop it soon!
The bottom temperature of the absorption and desorption tower increases, reducing the amount of hydrogen sulfide that enters the stabilization tower.
If the hydrogen sulfide content in the crude gasoline is too high, the pressure in the gas-liquid separation vessel at the top of the distillation tower can be appropriately reduced to allow the hydrogen sulfide to be released from the crude gasoline； If the hydrogen sulfide level in the rich gas is too high, the amount of ammonia water added can be increased, while proper preparation of the raw materials should also be ensured.
Try increasing the temperature at the bottom of the stabilizer or the heat load on the reboiler at the bottom; hydrogen sulfide should then move to the top of the tower.