Top 10 safety measures for the hottest oxygen defi

2022-08-09
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Top 10 safety measures for anoxic dangerous operation

anoxic danger when the servo motor drives the ball screw to rotate and move the beam downward, dangerous operation refers to various operations under potential and obvious anoxic conditions, mainly including general anoxic dangerous operations and special anoxic dangerous operations. Hypoxia dangerous operation is easy to cause various accidents. For example, when pure argon, carbon dioxide or nitrogen is used in places where industrial gases are used, especially in confined spaces or closed containers and pipelines, there are obvious anoxic conditions, and simple asphyxiation accidents are prone to occur. It is reported that on February 20, 2006, Ma, the manager of an enterprise subordinate to a Northeast Petroleum Administration Bureau, Yu, the deputy manager, Zhao, the technician, and Shi, the worker, were inspecting the synthetic ammonia device that was stopped for emergency repair and protected with nitrogen. Due to the failure to take effective protective measures, when the manhole cover of the horizontal fire arrester water sealed tank was removed, Yu immediately went down to the tank to check and fainted in the tank; Zhao found it in the manhole and went into the tank to save people. He also fainted in the tank; Ma, who was on the tank, shouted "save people quickly" and went into the tank to save people after getting the rope. He also fainted in the tank; Seeing this, Mr. Shi ran to someone to rescue the three people out of the tank. After on-site rescue, the three people died of nitrogen suffocation. Another example is that in the LPG storage tank, there are special hypoxia conditions during internal technical inspection, which is prone to asphyxiation accidents with anesthetic symptoms. According to another report, in May, 2003, two senior engineers and an engineer from a Quality Supervision Bureau in Jingdezhen City, Jiangxi Province, failed to discharge and clean the liquefied petroleum gas storage tank that an electronic company was going to restart according to the relevant regulations. Without taking any protective measures, the first senior engineer entered the storage tank and soon suffocated; Seeing that the situation was bad, the second senior engineer immediately entered the tank for rescue, and there was also no return; Then, another engineer and a driver on the scene also entered the tank, and only one survived, causing the serious consequences of three deaths. Another example is that when working in chemical containers, the residual chemicals are exposed or come into contact with the equipment brought in by the operation, causing severe reactions. In October, 179 imported extruders produced dangerous and harmful substances, and with a large amount of heat, combustion or explosion accidents were caused. In addition, the environmental conditions of oxygen deficient and dangerous operations are relatively poor, such as narrow working space, poor ventilation or no ventilation facilities, insufficient lighting or poor light, high temperature and humidity, which are also easy to cause personal injury accidents to operators. Therefore, it is necessary to strengthen the safety management of anoxic dangerous operation and implement the safety measures of anoxic dangerous operation to avoid the occurrence of anoxic dangerous operation accidents. According to the relevant provisions of the national standard "safety regulations for anoxic hazardous operations" GB, this paper puts forward 10 safety measures for anoxic hazardous operations, including safety technical measures, safety education measures and safety management measures for anoxic hazardous operations

1 safety isolation measures

when operators with oxygen deficiency hazards work inside the closed equipment connected to the transmission pipeline, they must close the valve tightly. Pipe valves conveying dangerous and harmful media should be guarded or warning signs such as "working, no opening" should be set up at eye-catching places. In case of anoxic dangerous operation, the blind plate can be inserted or a section of pipeline can be removed to effectively cut off the material source and prevent dangerous and harmful media from entering the workplace. When operators work in closed equipment, they should generally open the door or cover of the entrance and exit

2 measures to cut off the power supply

all mechanical power devices associated with the operation must be disconnected. Methods such as removing the drive belt, removing the fuse, pulling down the knife switch or locking the operation equipment can not be started can be taken to prevent starting the mechanical power device during the operation process, so as to avoid reducing the working space due to the operation of the device in oxygen deficient and dangerous workplaces or causing accidental injury to the operators whose reliability is guaranteed

3 ventilation measures

for workplaces with oxygen deficiency hazards, adequate and effective ventilation measures must be taken to keep the oxygen content in the air of workplaces above 19.5% throughout the operation process. It is strictly forbidden to use pure oxygen for ventilation, that is, it is strictly forbidden to use bottled or piped industrial oxygen for forced purging and ventilation. In the process of operation, if dangerous and harmful gases are found to escape, the treatment method should be determined in advance to prevent operators from being injured while working. If there is anoxic air in the space connected with the workplace, it should be directly discharged to prevent anoxic air from entering the workplace

4 sampling analysis and monitoring measures

according to the principle of detection before operation, the oxygen content in the air of the workplace must be accurately measured before operation, and the operation can be carried out only after it meets the requirements of national standards. Before accurately measuring the oxygen content, it is strictly forbidden to enter the oxygen deficient dangerous workplace. During the operation, the change of oxygen content in the air of the workplace should also be monitored, and corresponding necessary measures should be taken at any time. In the operation where the oxygen content may change or dangerous and harmful substances may be produced, many customers should be very satisfied with maintaining continuous monitoring or necessary sampling, analysis and measurement frequency after purchase. The monitoring personnel must be equipped with accurate and reliable analytical instruments, and should be calibrated and maintained regularly according to the standard requirements to meet the needs of sampling analysis and monitoring

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