Safety issues of airflow crushing production super fine powder

Safety issues for the manufacture of ultrafine powder include respiratory dust and dust explosion. Ultrafine pulverizer is low, and all of the lifescas is used in high quality wear-resistant materials at home and abroad. It has long service life. A small amount of easy wear parts are made of special hard resistance, small size, light weight, easy to replace the accessories. After the airflow pulverizer is filtered, the pulverizing cavity is sprayed through the Raval nozzle, and the material is repeatedly collided, friction, shear and pulverized, and pulverized material in the intersection of the multi-shaped high-pressure airflow. Next, the rising airflow is moved to the hierarchical region, and the crude material is separated under the powerful centrifugal force generated by the high-speed rotation, the fine particles that meet the particle size requirements are collected by the grading wheel into the cyclone and the dust collector, and the crude particles drops to the pulverization. The district continues to smash. The ultrafine pulverizer is composed of silo, mechanical pulverizer, air blower, cyclone, vibrating screen, liquid nitrogen tank, etc., the deep-cooling pulverizer system is refined by liquid nitrogen as a cold source, and it is crushing at low temperatures by cooling. After the crushing state, enter the mechanical pulverizing cavity through the impeller high speed rotation, the material and the blade, the tooth disc, the material and the material are enrolled under the integrated effect of collision, shear, friction, etc., to achieve a crushing effect. The dust particle size obtained by pulverizing the sample by the spray pulverizer is substantially less than 5 μm, and dust below 5 μm is most harmful to the human body. Therefore, the probability of using a gas flow pulverizer to break the sample operator's dustpulmonary disease occupational disease will increase significantly. At the same time, dust explosion may occur after the dust is scattered in the air. Due to the dust particles in which the dust particles in which the injection pulverizer pulverized sample has a suitable particle size and distribution: generally less than 5 μm, the particle size is less than 5 μm, and the dispersion stability in the air is good, and it is easy to achieve the explosion limit. The consequences of dust explosions are also very serious.

If there is sufficient combustion air around these particles, and the ignition energy is minimized, it is easy to explode. In addition, the impact of local dust cloud explosion causes a large deposited dust to fly with air, forming a secondary explosion. The dust explosion has the characteristics of large energy, severe harm, short explosion time, and it is easy to cause incomplete combustion, causing a large amount of carbon monoxide gas poisoning. Therefore, the consequences of dust explosions are extremely serious.