What is the safest way to handle a liquid nitrogen leak? Liquid nitrogen leak handling procedures

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In industry, liquid nitrogen is obtained through air separation. First, the air is purified, then liquefied under pressure and cooling conditions, with separation achieved based on the boiling points of different components in the air. When the nitrogen concentration is not too high, patients initially experience chest tightness, shortness of breath, and weakness ； Then irritability, extreme excitement, running, crying, daze, and unsteady gait occur; this is known as \"nitrous intoxication,\" and it can lead to a state of lethargy or coma. Exposure to high concentrations can cause the patient to lose consciousness rapidly, leading to death due to the cessation of breathing and heartbeat. 1. Quickly evacuate people from the area contaminated by the leak to upwind locations, and establish an isolation zone to strictly control access. 2. Notify the fire department and relevant agencies. 3. Emergency responders should wear self-contained positive-pressure respirators, cold-protective clothing, and cold-protective gloves. 4. Prevent leaked liquids from flowing into basements or other enclosed work areas; if this is unavoidable, notify the relevant authorities immediately. 5. Do not come into direct contact with the spill. 6. Cut off the source of leakage as much as possible. 7. Spraying can accelerate the evaporation of liquids, but a water gun cannot be used to spray on liquids. 8. Prevent gas from accumulating in low-lying areas; use exhaust fans to direct the leaking gas to open spaces. 9. It is prohibited for people to stay in low-lying areas or downwind zones. In the event of a liquid nitrogen leak, quickly evacuate people from the contaminated area to an upwind location and isolate it, strictly restricting access. It is recommended that emergency responders wear self-contained positive-pressure breathing apparatus and cold-protective clothing. Do not come into direct contact with the spill. Seal the source of leakage as much as possible. Use an exhaust fan to send the leaking air to an open area. Leaking containers should be properly handled, repaired and inspected before being used again.