Accident Analysis of Many People with Acute Nitrogen Oxide Poisoning (2)

Analysis of Cases of Acute Nitrogen Oxide Poisoning in Many People

1. ACCIDENTS

June 2, 1993 a Chemical Industrial Company nitrate nitrogen fertilizer plant shop parking annual overhaul plan. After stopping, it is necessary to pickle 2 caustic towers. Prior to pickling , a blanking plate must be inserted between No. 5 caustic tower and No. 2 circulating tank return pipe. The blinds were inserted before lunch. After starting work in the afternoon, insert blind spots in several other locations. In the blinding process, two workers pulled out the blinds inserted in the morning without anyone's instructions.

16:15 open acid pump, the column will be sent to caustic 20% dilute nitric acid. 16:20 was found out at the groove base absorption cycle brown nitric oxide gas. Informed the relevant personnel to stop the acid pump and open the blower vent valve and close the outlet valve. The nitric oxide gas emitted at this time has already flown into the downwind side of the sodium nitrate workshop building and its female bathroom. At this time, three female workers bathed in the women's bathroom and inhaled nitrogen oxides and experienced acute poisoning.

2. After the rescue

1 Save the poisoning scene. 1 out of 3 people immediately ran out of the tub to the workshop outside help. When poisoning was discovered, someone immediately put a gas mask into the bathroom to lift the other two out of the bathroom and immediately contacted the ambulance and sent it to the company staff hospital for emergency treatment.

2 The hospital immediately formed a rescue team. After the hospital received telephone notification occurs more than acute poisoning, immediately formed at the main branch of occupational diseases, internal medicine, ENT physicians participate in the rescue group to develop a concrete rescue plan.

3 fully rescue pulmonary edema. Three patients with poisoning had pulmonary edema after admission. The rescue team also fully rescues pulmonary edema, such as giving glucocorticoids, oxygen, and dehydrating agents. However, due to severe pulmonary edema, which led to respiratory failure, the first patient died 4 hours after poisoning . The remaining 2 patients also died 8 hours and 10 hours after poisoning .

3. Discussion

1 Cause of the accident: The idea of ​​“safety first” leadership of the nitrogen fertilizer plant is not firmly established. The major overhaul safety management system is not strict. If the management of the blinding board is confusing and the responsibility is not fulfilled, the layout task is not in place, and the blind board diagram printed and issued does not give the fitter who directly engages in the blind boarding operation. After the blind board is inserted, the blind board is not listed and the blind board is inserted. Failure to inspect etc. is the direct cause of the accident. The bathroom is too close to the production site, and living facilities such as the equipment bath room in the production area where toxic gases are generated are inappropriate.

2 Cause of death: The direct cause is severe respiratory edema caused by respiratory failure. However, such severe pulmonary edema should be promptly cut into the trachea, to facilitate the aspiration of edema fluid and secretions, clear the respiratory tract so that it is open; pressurization of oxygen, so that oxygen can break through the edema foam to the alveoli for gas exchange; positive pressure oxygen is also available Inhibition of alveolar manifestations of fluid exudation can reduce pulmonary edema. None of these measures were used in this rescue. Some regret. The use of glucocorticoids in the rescue of pulmonary edema emphasizes the principles of early, sufficient, and short range. There are also deficiencies in the application of hormones.

3 Lessons learned: Leaders at all levels of the company should firmly establish the idea of ​​"safety first." In particular, when it comes to major overhauls, it is necessary to strictly manage the system. When laying out work, we must also talk about safety, and do a good job of work and responsibility.

Many people have acute nitrogen oxide poisoning in chemical companies. Therefore, it is very important for companies that have potential nitrogen oxide poisoning to prepare for emergency rescue plans for acute poisoning .

The information in this article comes from the Internet and was reorganized and edited by China Rescue Equipment Network.