In the maintenance of nitrogen water precooling system, the most important thing is to prevent nitrogen asphyxiation accidents. In China, there have been several times of death of maintenance workers due to nitrogen asphyxiation. During maintenance, the nitrogen used for the unit is often heated at the same time, and the heated nitrogen often enters the cooling tower through the sewage nitrogen three-way valve, resulting in high nitrogen concentration in the tower.
Therefore, the air cooling tower and water cooling tower shall be separated from the device with blind plates before heating the device; The oxygen content in air cooling tower and water cooling tower shall be analyzed. When the oxygen content is between 19% and 21%, maintenance personnel are allowed to enter; If working in an area with oxygen content lower than 19%, someone must be assigned to monitor and wear an isolation mask (oxygen respirator, long tube mask, etc.).
Whether it is equipment installation or maintenance debugging, DEAR Air Separation can provide customers with comprehensive support. The technical service team composed of experienced and skilled commissioning experts is active in many regions and continuously receives technical skills training. DEAR's equipment maintenance and commissioning is systematic, and strict checklists and agreements need to be filled in to meet the standard delivery requirements.
