Why cannot water be directly sprayed on the liquid chlorine cylinder in case of a chlorine leak?
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Today I saw a small container of chlorine leaking; water cannot be sprayed directly on the bottle. But the book does not explain the reason. For example, why can’t water be used directly to spray a liquid chlorine cylinder in the event of a chlorine leak? Dear sea friends, if anyone knows, please help explain it.
Chlorine forms saltwater when it comes into contact with water, and using water to flush it out will inevitably cause harm; instead, it must be diluted with misted water. 1# suiyueranfa8
Chlorine dissolves in water to form hydrochloric acid, which corrodes the bottle and increases the area of leakage
I forgot to mention something – using alkaline water is also possible. The entire bottle can be pushed into the alkali tank.
Looking at the reaction between chlorine gas and water, the chemical equilibrium is CL2+H2O===HCLO +HCL. Then, hypochlorous acid decomposes into oxygen and hydrochloric acid under light exposure; as a result, the amount of hypochlorous acid decreases, causing the equilibrium to shift to the right. Therefore, chlorine gas can dissolve completely in water. The overall equation is 2Cl2 + 2H2O = 4HCl + O2. The production of large amounts of hydrochloric acid accelerates the corrosion of gas cylinders, posing greater risks. The 3rd floor is correct.
It is strictly prohibited to release water blindly, to avoid the formation of corrosive substances such as hypochlorous acid or hydrochloric acid; instead, a 15%–20% calcium hydroxide solution or 5%–15% lime water should be used for spraying in order to dilute these substances.
Reply to the original poster: If a liquid chlorine cylinder or container leaks, spraying water directly on it will accelerate vaporization, thereby expanding the radius of the leak and the range of toxicity. Diluting with misty water can reduce the chlorine concentration in the air of the work area and prevent further spread of toxic gases. Therefore, the corrosion equipment mentioned above is not a major factor in emergency rescue.
What was said upstairs makes sense: water has a high specific heat, and when water is sprayed on it, liquid chlorine vaporizes more rapidly due to the heat absorbed, resulting in even more leakage. The usual approach is: 1. Rotate the cylinder so that the leak point (in the gas phase) is facing upward, preventing liquid chlorine from flowing out rapidly ； 2. Plug the gas leak with a toothpick or other sharp wooden objects ； 3. Large leaks need to be pushed into the prepared alkali tank for absorption; as for the misty water, it may not be possible to find it right away.
This post was last edited by cy32 on 2009-12-12 08:36. 8# TF123: Generally, factory premises should have adjustable fire hoses that can be used to release misty water for dilution purposes. Actually, it’s best to put it in the alkali tank – that way it’s done in one step. As for the small leak being blocked with a toothpick, what then? Sealing a gas cylinder leak does not mean that the incident handling is complete. What should be done with the leaking cylinders? Is it to put chlorine gas into a good-quality cylinder? ? I have a question.
Yes, I need to find time to go to the accident handling tower or to produce sodium hypochlorite. Using misty water is to prevent the diffusion of chlorine gas after it vaporizes
I’ve learned it already; since everyone else has spoken, I won’t show off my skills here! Hehe