First, the warning zone is divided according to the site conditions, and the disposal vehicles and personnel are generally parked in the direction of higher terrain and upwind (or crosswind).
Second, the disposal personnel should take necessary personal protective measures. Wear isolated chemical protective clothing and air respirator when handling leakage or related equipment. Wear winter clothes when in direct contact with liquid ammonia. In case of emergency, you can also wear cotton-padded clothes and trousers, tie trouser legs's sleeves tightly, and cover your mouth and nose with a wet mask.
The third is to quickly remove all fire sources and combustibles in the leakage area and strengthen ventilation. When the cylinder leaks, use spark-free tools when handling, and try to make the leakage port upward to prevent a large amount of liquefied gas from flowing out. When the valve closing and plugging measures are ineffective, we can consider soaking the cylinder in water or dilute acid solution, or moving it to an open area for decontamination.
Fourth, the leaked liquid ammonia should be dispersed with misty water and flower water. When handling, try to prevent leakage from entering water flow, sewers or some controlled areas.
5. In case of fire, use atomized water, toilet water, anti-soluble foam, sand or CO2 to extinguish the fire, and pay attention to cooling the container wall with a large amount of once-through water.
If possible, remove movable items from the fire as soon as possible. If there are dangerous signs such as loud sound at the container exhaust port or discoloration of the container wall, you should immediately retreat.
Extended data;
1. Matters needing attention in operation and disposal
Strictly sealed, providing sufficient local exhaust and comprehensive ventilation.
Operators must be specially trained and strictly abide by the operating procedures.
Operators are advised to wear filter gas masks (half masks), chemical safety glasses, anti-static work clothes and rubber gloves. Stay away from kindling and heat sources, and smoking is strictly prohibited in the workplace. Use explosion-proof ventilation system and equipment. Prevent the gas in the workplace from leaking into the air. Avoid contact with oxidants, acids and halogens. Lightly load and unload when handling, so as to prevent the cylinders and accessories from being damaged. Equipped with corresponding varieties and quantities of fire fighting equipment and leakage emergency treatment equipment.
2, storage matters needing attention
Store in a cool and ventilated warehouse. Stay away from fire and heat sources. The reservoir temperature should not exceed 30℃. Should be stored separately from oxidants, acids, halogens and edible chemicals, and should not be mixed. Adopt explosion-proof lighting and ventilation facilities. It is forbidden to use mechanical equipment and tools that are easy to generate sparks. The storage area should be equipped with emergency treatment equipment for leakage.
Reference source;
People's Daily Online-Watch a "liquid ammonia leakage" fire drill in three minutes.
People's Daily Online-Putuo District, Zhejiang Province held an emergency rescue drill for handling hazardous chemicals accidents.