Question regarding the chlorine absorption device for liquid chlorine storage tanks in case of accidents~~
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This post was last edited by sunjl1981 on 2013-1-6 at 22:56. Currently, an accident chlorine absorption device specifically designed for liquid chlorine storage tanks is being developed. Each liquid chlorine storage tank has a capacity of 80 m**3, with a filling rate of 80%; there are 4 such tanks in total, one of which serves as a spare tank. Consider the case of a leak in a liquid chlorine storage tank. The plant is designed to be airtight; in the event of an accident, the emergency fans are activated automatically, drawing in the chlorine gas that has leaked into the plant along with air, and sending it to the emergency tower where it is absorbed by NaOH solution. I would like to ask: for a liquid chlorine storage tank facility like this, what amount should be considered as the total leakage in the event of an accident, and how should the leakage rate be determined? Among them, the total leakage amount is related to the amount of alkali stored in the accident system, while the leakage rate is related to the diameter of the absorption tower. Another point is whether the exhaust gas from the emergency fans should be discharged directly after absorption, or whether it should be sent back into the factory building for further circulation after absorption Thank you! ! # ， ， &
Since I have not seen such devices, I will only share a few personal opinions for reference! 1. Since chlorine has a high density, it is difficult to extract it from above using a fan; if extraction is to be carried out from the ground, a certain number of exhaust openings must be installed in appropriate locations ； 2. The amount of chlorine leakage is closely related to the cause of the leakage as well as the tank pressure. If the break occurs at connections such as flanges, the leakage rate is extremely ** high; in fact, all of the liquid chlorine in the tank leaks out ； If the leakage is caused by trachoma-like corrosion, it can be addressed by chlorination or plugging under pressure; the amount of leakage depends on the tank pressure, the size of the leak site, and the duration of the leakage (the leak hole tends to grow larger over a longer period of leakage). 3. It is recommended to discharge the absorbed gas; do not use ventilation systems indoors, as this will accelerate the contamination caused by chlorine gas. Fresh air can be used for natural ventilation into the factory building from a height of 1.5 to 2.0 meters.
When the leakage is high, the absorption by the alkaline solution becomes saturated, and it’s not clear how to detect this and replenish new alkali.
Three tanks are prepared for alkali absorption: one is used for sodium hypochlorite, and another concentrated alkali sump is installed for replenishment