Safety technical measures for explosion prevention

The safety technical measures for explosion-proof of centrifuges

aim at the fact that when centrifuging flammable and explosive materials, the centrifuge can be filled with combustible gas. Once the centrifuge produces sparks due to static electricity or other reasons, the centrifuge will have a combustion and explosion accident. Therefore, when centrifuging the solution containing flammable and explosive materials, it should ensure that the centrifuge is sealed and explosion-proof. When inert gas or other gases are used for protection, such as filling nitrogen into the centrifuge to replace the air inside, so as to maintain the oxygen concentration within a safe range. To control the concentration of oxygen, generally, oxygen concentration monitoring method can be used to strictly control the concentration of oxygen

first of all, it is necessary to ensure that the gas source of nitrogen is stable and operate in strict accordance with the operating procedures. The two accidents mentioned above are caused by the operator opening the unloading valve and opening the centrifuge without the protection of nitrogen. The solution enters the high-speed rotating centrifuge, generating electrostatic sparks to detonate the toluene mixed gas, resulting in the explosion of the centrifuge. When the nitrogen pressure is insufficient or the nitrogen supply system fails, the alarm will be sent out through the alarm device and the machine will stop automatically; When the centrifuge is started, nitrogen must be used to replace the gas in the centrifuge system, and the centrifuge can be started up only after the concentration of oxygen reaches 1% - 2%; When the centrifuge is fed with a very simple treatment method, the floating liquid and washing liquid must be protected with nitrogen to prevent air from entering the centrifuge at the end of the feeding or with the swirling mist of the liquid; In case of power failure, in order to realize the normal operation of nitrogen purging, it is required to select the normally closed solenoid valve to ensure that the nitrogen pipeline valve is always open in case of power failure

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it should be noted that when the enterprise is transforming the original centrifuge, it should set up corresponding supporting facilities, such as oxygen detection system and chain protection device, in the inert protection transformation for the centrifuge, otherwise it is very easy to be caused by the unstable inert protection gas source, poor management and misoperation, Since most of the basic functions of the universal experimental machine refer to various basic functional characteristics of instruments and equipment and some utilization characteristics, the system is sealed, which leads to a more serious centrifuge explosion accident

for inflammables and explosives in centrifuges, first of all, when Chinese chemical enterprises decide whether to conduct mergers and acquisitions, the centrifuge can be filled with combustible gas. Once the centrifuge produces sparks due to static electricity or other reasons, the centrifuge will have a combustion and explosion accident. Therefore, when centrifuging the solution containing flammable and explosive materials, it should ensure that the centrifuge is sealed and explosion-proof. When inert gas or other gases are used for protection, such as filling nitrogen into the centrifuge to replace the air inside, so as to maintain the oxygen concentration within a safe range. To control the concentration of oxygen, generally, oxygen concentration monitoring method can be used to strictly control the concentration of oxygen

first of all, it is necessary to ensure that the gas source of nitrogen is stable and operate in strict accordance with the operating procedures. The two accidents mentioned above are caused by the operator opening the unloading valve and opening the centrifuge without the protection of nitrogen. The solution enters the high-speed rotating centrifuge, generating electrostatic sparks to detonate the toluene mixed gas, resulting in the explosion of the centrifuge. When the nitrogen pressure is insufficient or the nitrogen supply system fails, the alarm will be sent out through the alarm device and the machine will stop automatically; When the centrifuge is started, nitrogen must be used to replace the gas in the centrifuge system, and the centrifuge can be started up only after the concentration of oxygen reaches 1% - 2%; When the centrifuge enters the liquid, the floating liquid and washing liquid must be protected with nitrogen to prevent air from entering the centrifuge at the end of the liquid feeding or with the swirling mist of the liquid; In case of power failure, in order to realize the normal operation of nitrogen purging, it is required to select the normally closed solenoid valve to ensure that the nitrogen pipeline valve is always open in case of power failure

it should be noted that enterprises should set up corresponding supporting facilities, such as oxygen detection system and chain protection device, in the transformation of inert protection for centrifuges when transforming the original centrifuges. Otherwise, it is very easy to cause more serious centrifuge explosion accidents due to unstable inert protection gas source, poor management, misoperation and system sealing