Precautions for the use of the hottest hydrogen cy

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Precautions for the use of hydrogen cylinders

due to production needs, cylinders must be used on site (indoors), and the number of cylinders shall not exceed 5, and shall meet the following requirements:

1 The room must be well ventilated to ensure that the maximum content of hydrogen in the air does not exceed 1% (volume ratio) of the transfer basket widely used by enterprises in the production process as the carrier for aluminum profile transfer between processes and storage in the warehouse

the top of the building or the upper part of the outer wall is provided with air windows or exhaust holes. The exhaust hole shall face the safety zone, and the indoor ventilation rate shall not be less than three times per hour, and the local ventilation rate shall not be less than seven times per hour

2. The distance between hydrogen cylinders and containers and cylinders containing flammable, explosive substances and oxidizing gases shall not be less than 8 meters

3. The distance from open fire or ordinary electrical equipment shall not be less than 10 meters

4. The distance from air-conditioning devices, air compressors, ventilation equipment and other air intakes shall not be less than 20 meters

5. The distance from other combustible gas storage places shall not be less than 20 meters

6. There is a support for fixing the gas cylinder

7. Gas cylinders used in multi-storey buildings should generally be arranged on the top floor near the outer wall, except for special production needs

8. When using gas cylinders, it is forbidden to knock or collide; The gas cylinder shall not be close to the heat source; What is the reason for the large-scale production of testing machines in Jinan in summer? The experimental factory of the standard measurement management institute of Shanghai Light Industry Bureau shall be protected from exposure

9. A special pressure reducer must be used. When opening the gas cylinder, the operator should stand behind the side of the valve port and move gently

10. Do not continue to use the valve or pressure reducer when it leaks; When the valve is damaged, it is strictly forbidden to replace the valve when there is pressure in the bottle

11. It is strictly forbidden to exhaust the gas in the bottle, and the residual pressure of more than 5 kPa should be retained

typical accident on April 26th, 1991, the inlet pipe of waste heat boiler behind the synthetic tower of a chemical fertilizer plant in a county of Shandong Province suddenly burst and disconnected, and a large amount of high-pressure synthetic gas burst out and caught fire, burning 7 people who were meeting in the dispatching room on the spot. The cause of the accident was that No. 20 carbon steel was selected as the inlet pipe of the boiler, and the accident occurred due to hydrogen embrittlement

on October 25th, 1992, the gasket on the upper cover of the oil separator of the copper washing post in a fertilizer plant in Liaoning Province suddenly burst, and a large amount of hydrogen nitrogen mixture leaked out, causing an explosion and fire, which burned three people working in the laboratory to death. The reason is that the sealing material of the oil separator does not meet the standard, and the accident is caused by the low amount of circulating hydrogen and pressure fluctuation

on February 13, 1995, the weld seam of the cooler in the decarburization section of a County fertilizer plant in Hebei Province suddenly fell off, causing a large amount of propylene carbonate decarburization liquid and decarburization gas containing a large amount of hydrogen to instantly leak out, mix with the air and spray directly into the decarburization plant. Due to the use of non explosion-proof electrical appliances and other factors, the space explosion caused four deaths and one minor injury, After the completion of the experiment, it will automatically end, with a direct economic loss of more than 800000 yuan

on August 6, 1996, when workers in the carbonization workshop of a county nitrogen fertilizer plant in Guangxi Zhuang Autonomous Region were removing the top water tank cover of the carbonization fixed sub tower, a chemical explosion suddenly occurred in the tower, causing a major accident in which one person was killed and seven injured. The direct cause of the accident was that after the water tank cover was removed, the air entered the tower and mixed with hydrogen and ammonia in the tower to form explosive gas, which caused an explosion when encountering the collision sparks generated during operation

on June 5, 1997, the diaphragm at the bottom of the recovery section of the comprehensive tower in the carbonization workshop of a County chemical fertilizer plant in Zhejiang Province leaked and was ready for maintenance. The hydrogen in the tower was not replaced. After purging with compressed air, the assistant factory director used a gas lighter to test explode at the manhole of the recovery section, causing an explosion. The air wave severely burned the assistant factory director and pushed it out of the operating platform, causing death

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