When will the three water separation tanks of the medium-pressure gas system suddenly see a rise in level?
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If the plant experiences a large-scale power outage and needs to be shut down, with all the valves that need to be closed already closed, what causes the liquid level in the three medium-voltage gas separation tanks to rise?
Has the steam isolation valve been closed? Is it due to the valve timing?
Generally, after a power outage, the converter stops processing hydrocarbons, but the steam supply remains unchanged. Due to the sharp decrease in steam consumption, all of it condenses into water in the downstream system, causing the liquid level in the three-tank system to rise; therefore, it is necessary to reduce the steam supply promptly. Furthermore, since the flow of medium-temperature gas in heat exchangers such as deoxygenated water systems, demineralized water systems, feed gas streams, and air cooling systems will be interrupted, this will cause changes in the temperature of the medium-temperature gas as it passes through the three liquid separation tanks. As a result, the amount of liquid that condenses in these three tanks will also change, leading to significant variations in their liquid levels compared to before.