In late September 25th 18 when make, the ammonia storage tank in just the replacement after cold storage plant in an electronics factory in Nantong, a pipeline valve at the sudden accident, a high concentration of ammonia plant in the moment in diffusion, if not to take timely measures to high concentration of ammonia is extremely easy to cause death. After the accident, the local fire officers and technical staff after more than 1 hours of effort, will rule out the danger, the accident caused no casualties.
25 days 18 when the left and right sides, one staff member is Nantong Daming electronics factory work, when he has just completed the refrigeration plant ammonia storage tank filling operation, a white gas with pungent smell suddenly from the ammonia storage tank out below. At this time, he lower consciousness to the storage tank leaks. When he lowered himself to the exploration, tank body has filled the thick hoar. At this time, only to hear "Chi Chi" the leak sound, can not see any situation. Then, he immediately call the police calls, and inform the staff within the plant to evacuate immediately.
10 minutes later, Nantong City Yi Bridge fire squadron officers and soldiers dispatched 4 fire engines and 20 fire officers and soldiers arrived at the scene. At that time, the fire officers and soldiers to rescue the way to smell the pungent smell, refrigeration workshop also gathered a lot of white mist in the air. The squadron commander after investigation and inquiry, that the electronic factory ammonia storage tank filled with nearly 6 tons of liquid ammonia, leakage point in tank bottom valve. At this time, the squadron commander immediately ordered that all the soldiers wear air respirator, sets up the warning to prevent other persons to enter in the range of 200 meters at the same time. When determining the cold storage refrigeration plant do not have the personnel, two fire officers and soldiers wearing anti-chemical suits to the ammonia storage tank valve handle. At the same time, in the cold storage plant more than three fire officers and soldiers erected outside the water cannons to drive to dilute ammonia leak. Because of a large amount of ammonia refrigeration workshop workshop diffuse, dark, narrow space of fog. At this time, to enter the two fire officers and soldiers in the accident in the bad environment, overcome the most likely the risk of choking off valve processing.
1 minutes passed, 2 minutes passed...... After 5 minutes, two fire officers and soldiers will close the valve. As the valve long time dead rust, part of the pipeline has been aging. At this time, there are still a small amount of ammonia gas overflow from the pipe. Two fire officers and soldiers after investigation found, originally in the leakage of the valve at a screw fell. Then, the squadron commander and contact the factory technical personnel to enter the workshop repair. At this time, because the ammonia concentration in the plant is very high, the commander in the consideration of safety technical personnel, more than the command into the workshop dilution water. 20 minutes later, a lot of ammonia were forced evacuation of workshop. Technical personnel to wear air respirator security into the workshop repair. For about 20 minutes, the leakage of the valve screws were completely repaired, ammonia leak completely shut off the valve processing. Through the joint efforts of the fire officers and soldiers and technicians, rescue accident at eighteen fifty-six the successful disposal, ammonia gas was completely dilution. The accident caused no casualties.
It is understood, ammonia leak, from a liquid to a vapor, liquid ammonia will rapidly vaporized, volume expanding rapidly, not timely vaporization of liquid ammonia to form droplets in the steam leakage; in the early, because the part of ammonia evaporation, the ammonia vapor cloud density in air density, ammonia, the wind drift, easy to form the large exposure area.
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