What are the explosion-proof measures for centrifuges?

 What are the explosion-proof measures for centrifuges?

In pharmaceutical and chemical production, if the materials processed by the centrifuge contain flammable and explosive solvents (such as ethanol, toluene, etc.), explosion-proof measures must be in place. When a centrifuge operates at high speed, sparks can be generated by the collision of metal parts, and electric arcs may also be generated during motor operation.

The three elements of combustion are as follows, showing the three components required for combustion and explosion prevention. All three elements must be present simultaneously for combustion to occur. Isolating any one of these elements can achieve the purpose of explosion prevention.

1. Combustible substance: methanol, ethanol, ammonia, toluene, or mixed flammable gases, flammable substances, etc.

2. Oxidizing agent: oxygen or air, etc.

3. Ignition source: open flame, spark, electric arc, or hazardous high temperature.

What are the explosion-proof measures for centrifuges?

1. Use a nitrogen protection device. Before the centrifuge starts operating, the nitrogen protection device first fills the centrifuge with nitrogen to reduce the oxygen concentration inside to a safe range (e.g., below 6%, depending on customer requirements and material properties). Bengbu Jinggong Pharmaceutical Machinery's self-developed nitrogen protection device is equipped with oxygen content detection, monitoring the oxygen concentration inside the centrifuge in real time. Once the oxygen concentration exceeds the preset value, the high-pressure nitrogen valve automatically opens, accelerating the filling of the centrifuge with nitrogen until the oxygen concentration falls below the preset value, at which point the high-pressure valve closes.

2. Fully Enclosed Design. The machine cover, observation window, and discharge port are all equipped with flanges and sealing rings. The liquid outlet pipe can be equipped with a liquid-sealed tank or liquid-sealed pipe to ensure internal sealing and guarantee the normal operation of the nitrogen protection device.

3. Explosion-proof Electrical Equipment. This includes explosion-proof motors, explosion-proof lights, explosion-proof control boxes, explosion-proof buttons, explosion-proof junction boxes, explosion-proof flexible hoses, explosion-proof vibration protection, and explosion-proof limit switches. The explosion-proof control box uses explosion-proof buttons and switches. Even in the event of an explosion, the explosion-proof enclosure will contain the explosion within the box, preventing it from becoming an ignition source for surrounding flammable gases or dust. Anti-static belts must be used for motor drives.

4. Braking Method. Non-contact energy-dissipating braking must be used; mechanical friction braking devices are prohibited.