1 Hydrogen cylinder leakage (not fire) accident
Hydrogen cylinder leakage generally occurs in the bottle valve and cylinder connection threads or the bottle valve is not closed tightly at the interface of the jet leakage. Treatment is to strictly isolate the source of ignition fire, in the hydrogen gas may spread within the scope of the region to evacuate people, electrical switches to remain intact, can not be pulled at will, in order to avoid fire. Move the leaking cylinder to a ventilated and open place. Conditions can be strengthened ventilation, to ensure that the hydrogen concentration is reduced.
If the hydrogen cylinder valve is not closed tightly, close it tightly.
2 hydrogen cylinder leakage fire accident
Because the bottle valve is not closed tightly, the flame along the bottle valve out of the sound outside the jet, you can wear gloves to quickly close the bottle valve can extinguish the fire. If the bottle valve can not be closed or along the bottle valve interface threads to the outside of the horizontal or vertical jet flame, should immediately use water to cool the accident bottle or the surrounding baked cylinders, so that it cools down to avoid the explosion, under the conditions of the possibility of emergency crews wearing good protection supplies, the accident cylinder transferred to a safe place (ventilated, open, no flammable material around), continue to cool the bottle at the same time to use a dry-powder extinguisher to extinguish the fire. When the surrounding fire prevention measures are not done, do not extinguish the fire, so as to avoid a large amount of gas spillage caused by the explosion. Ensure that it does not explode under the premise of letting it burn itself until it burns close to extinguish.
If there are more cylinders around the first cooling around the flame baked cylinders and accident cylinders to avoid chain explosions.
3 hydrogen cylinder explosion
Hydrogen cylinders on fire, due to high temperature baking, the internal pressure increases, when the pressure exceeds its maximum working pressure (design pressure), the explosion may occur.
After the explosion, the measures taken:
The explosion occurred suddenly, and the destructive power is huge, after the accident, should immediately command the commander-in-chief, deputy commander-in-chief report, other members of the command and accident rescue professionals should be quickly rushed to the scene of the rescue, rescue. Triggered secondary fire to take measures at the same time, immediately to the fire department alarm (119), resulting in casualties, we must immediately report to the public security organs, to maintain order at the scene, the medical ambulance department for emergency care, while the command is responsible for reporting to the next level of competent authorities.
Rescue measures are as follows:
(1) take measures (evacuation, transfer).
(2) Rescue the injured and send them to the ambulance service quickly.
(3) Protect the scene. Do a good job of guarding, maintaining communication and traffic flow.
(4) Evacuate unrelated people, stop onlookers.
If a fire occurs, you can implement long-distance water spray cooling, or use other fire extinguishing methods to extinguish the fire.
4 Hydrogen gas cylinder custody handling measures
Hydrogen gas cylinder custodian must be familiar with the safe use of gas common sense, before going on duty must wear the provisions of the anti-static protective gear.
Custodian should strictly check the empty cylinders returned to the station, such as found fire baking, falling touch, rolling smash, so that the cylinder body deformation and other conditions should immediately stop using, overhaul. Empty cylinders should be picked out, to be properly handled before use.
Inflated cylinders in addition to leaving the turnover on the loading and unloading platform, the rest must be placed in the warehouse neatly, and is strictly prohibited with the empty bottles mixed together.
Cylinders found in the library leakage, should be immediately reported to the quality control engineering is handled by the inspection. The library should often open the window and door to ensure that the indoor air circulation.
Laboratory
5 laboratory gas varieties, such as improper preservation, gas confusion prone to explosion.
Chemical reagents used improperly preserved, may cause harm to human skin, eyes and respiratory system.
Chemical reagents, if lost into the community, is likely to cause harm to society.
The leakage of gas from the instrument is likely to cause accidents.
Laboratory personnel such as lack of knowledge, poor safety awareness, unauthorized operation, operation error prone to accidents.
Hydrogen cylinder accident emergency measures [Part 2]
A typical chlorine gas leakage poisoning accident
Accident 1: August 3, 2001 at 17:00, Lanzhou City, Gansu Province, Donggang East Road, a scrap metal recycling company occurred in the chlorine gas leakage accident, the poisonous gas diffused to the surrounding family areas, specific The number of poisoned people is difficult to count, more than 60 of them were sent into the surrounding hospitals to save more than 10 children in the hospitalized staff. According to eyewitnesses, a high-pressure cylinder in the scrap iron and steel bush issued a "giggle" sound, followed by a stream of yellow gas through the pile of scrap iron rises up to the sky, a strong odor to the surrounding diffusion, resulting in numerous staff poisoning. Later, it was known that the toxic gas was chlorine gas. It is understood that, due to the high pressure cylinders filled with chlorine gas placed in the sun for a long time exposure, resulting in valve cracking, chlorine leakage. This accident also has some lessons: one is full of gas cylinders can not be in the open air for a long time exposure; second is the scrap metal recycling station, the acquisition of gas cylinders at will, regardless of whether it is full or empty cylinders, the acquisition of a random pile, become a hidden danger of accidents; third is the governance of laxity. At present, the gas cylinder "lost" a lot of people, profit-making, scavengers sold to the scrap yard, become a hidden danger point.
Accident 2: At 20:30 on July 9, 2017, a factory in Xixia District, Yinchuan City, Ningxia Hui Autonomous Region, a worker closed the sealing tank valves, found that the valve is loose, and chlorine leakage occurred in the process of closure. At that time, there were 4 workers upwind of the scene, immediately called out to the chlorine leak only 4~5m from the point of plant more than 10 workers immediately evacuated to the wind direction. About 250m downwind from the incident site of the factory workers' dormitory, there are four workers in front of the dormitory door to play chess, 20:35 or so, after hearing a sound, a yellow smoke came to the face, and then felt breathing difficulties, chest tightness, coughing, etc., and immediately from the dormitory next to the fence out, followed by the dormitory workers with towels to cover their mouths and noses to evacuate. The person in charge of the factory found that the chlorine gas leakage, immediately turn off the chlorine gas tank valve. At the same time quickly sent the poisoned staff to the hospital for treatment, and immediately reported to the relevant parts of the upper level, ordered the plant to stop production. Afterwards, it was found that due to the corrosion of the valve under the chlorine buffer tank of the plant, resulting in chlorine leakage, causing downwind of the staff and residents of 123 poisoned, 5 mild poisoning, 118 irritation reaction, but fortunately no staff died.