As a general filtration and separation equipment, centrifuges are widely used in chemical, pharmaceutical, petroleum, pesticide and other industries. Due to the wide variety of materials processed by centrifuges, most of them are flammable and explosive materials. At the same time, because the centrifuge rotates at a high speed, it is easy to accumulate static electricity when rotating. In the case of combustible materials and suitable environmental conditions, it is easy to cause combustion and explosion accidents.
Next, according to the potential fire and explosion hazards when the centrifuge centrifuges the solution containing flammable and explosive materials;
1. This article analyzes the causes of combustion and explosion accidents and puts forward the basic principles of explosion protection;
2. In view of the potential safety hazards in the process of separating the solution containing flammable and explosive materials by the centrifuge, corresponding safety countermeasures are proposed.
Three elements that cause an explosion: a certain concentration of combustible gas, a certain amount of oxygen, and a fire source with enough heat to ignite them. The coexistence of the three basic conditions to prevent chemical explosions is the basic theory for preventing chemical explosions of combustible substances.
Explosion-proof measures of the centrifuge: the centrifuge is designed to have enough safety for the moving parts, no friction occurs during operation, non-contact braking, anti-static belts for transmission belts, and electrostatic grounding devices on the machine.
In order to reduce the oxygen concentration in the machine, the most common method is to fill the centrifuge with nitrogen to reduce the oxygen concentration in the machine and reduce the oxygen concentration in the machine below the explosive limit of combustible gas.
It should be noted here that the simple nitrogen filling device only fills the centrifuge with nitrogen, and does not check whether the nitrogen filling is reliable. When the nitrogen is abnormal, it cannot be detected in real-time, and the running centrifuge cannot be stopped immediately, which is prone to danger!
Therefore, in order to ensure reliable nitrogen filling protection, a nitrogen gas detection device is required. Commonly used detection methods include nitrogen pressure detection, nitrogen flow detection, and oxygen concentration detection.