Liquid nitrogen is a high-risk chemical products, with ultra-low temperature, swelling, odorless and non-toxic characteristics. In the use of transport process, we must strictly in accordance with the operational requirements of the operation, to avoid the operation of liquid nitrogen tank transport improper storage caused by the explosion, ranging from equipment damage will result in heavy casualties and other consequences. So the liquid nitrogen tank in the course of the use of the safety should be a high degree of attention. Liquid nitrogen tank operation of the application of the following aspects.
  1. external environmental impact
  Eliminate high temperature and high pressure
  Eliminate collision vibration
  New sub-liquid nitrogen tank has a special anti-shock design, in addition to standing storage, but also in the filling state of transport use.
  To avoid the use of liquid nitrogen and storage environment, ventilation is not good, will cause indoor nitrogen and nitric oxide gas concentration concentration dispersed, to the explosion limit, causing an explosion.
  2. improper storage and transportation
  Liquid nitrogen tank storage types can generally be divided into storage tank and nitrogen tank transport liquid tank 2 kinds. Storage tank is mainly used for indoor liquid nitrogen storage, should not be used in the working state for the use of distance transport.
  3, improper use
  Long-term use of liquid nitrogen tank, if the use of the operation process is not done regularly maintenance inspection and maintenance, equipment will be insecure, may cause an explosion.
  Liquid nitrogen tank operator must go through safety education, can not just rely on the master to teach oral manipulation skills after induction manipulation, security, quality and skills are poor, but also prone to accidents.
  Safety control measures for liquid nitrogen tank
  The safe use of liquid nitrogen containers should be ensured from the following aspects.
  1. Check before using check
  Liquid nitrogen tank before use, should its appearance, logo logo, product certification, the use of manuals and other strict checks, the container pressure meter should be sent to the measurement and testing institutions to test, qualified before use. Container safety valve, rupture disc and other safety devices to ensure that intact, to ensure that no exception before the situation into the use.
  2. Check whether the shell is defective before filling
  Liquid nitrogen tank before filling, to check whether the shell depression, vacuum exhaust port is intact. If the damage is broken, the vacuum will be reduced, the serious intake can not heat, so that the upper part of the tank will be frost, liquid nitrogen loss, lost to continue to use the value.
  3. Use the tank at any time to check the use of the situation
  In the course of use, should be checked at any time the use of the tank. If there is liquid nitrogen in the tank, if the tank cap and the upper part of the water droplets or frosting situation, then the tank quality problems, should immediately stop using. In the tank cap and the upper part of the phenomenon of no water or frosting, touch the shell by hand, feeling the upper cold, the lower part of the heat, indicating the quality of the tank there is a problem, that is, the greater the daily increase in liquid nitrogen should be observed, to prevent Liquid nitrogen consumption loss, resulting in damage to the storage material, this time the best stop using; if the same temperature up and down, indicating the quality of the tank no problem. Use the process to always check; can be used to observe the naked eye, you can touch the shell by hand, if the appearance of hanging cream, should stop using. In particular, the neck of the neck with frost icing should not use sharp knives and other sharp appliances to scratch, to prevent damage to the inner wall of the neck, resulting in poor vacuum.
  4. Check the way the liquid nitrogen container is stored
  Liquid nitrogen tank to be stored in a cool and well-ventilated place, not in the sun straight. In addition, both in the use or storage, liquid nitrogen cans can not tilt, horizontal, reverse, stacking, collision or collision with other objects, to do lightly, and always keep erect.
  5. Establish daily maintenance records
Production and operation of the unit should be developed liquid nitrogen containers on the safety of production rules and regulations and safe operation procedures, the establishment of regular container inspection and routine maintenance records.
  6. Equipped with part-time management staff
Use the unit to clear the management part, with the necessary part-time management staff, regular maintenance of liquid nitrogen containers in the inspection, found that the failure or hidden danger should be immediately disabled, the accident reported in a timely manner. If the container in the use of surface frost, condensation phenomenon, should immediately relieve pressure   and stop using, quickly identify the reasons, troubleshooting before re-use.
  7. Not qualified for safety training
  The main person in charge of the production and operation unit, the safety management staff and the equipment operator shall receive the necessary safety training, familiar with the relevant safety rules and regulations and safety procedures, have the necessary knowledge of safety production, grasp the safe handling skills of the post, Accident, control of hazards and emergency handling capacity. Those who are not qualified for safe production training shall not be allowed to perform their duties.
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