Preventive measures for powder safety in boiling and drying equipment are essential to ensure operational safety and reduce risks associated with static electricity and dust explosions. While some studies have addressed the second type of hidden dangers related to powders, there is still a need for comprehensive strategies tailored specifically for boiling and drying systems.
One key area is the implementation of anti-static measures. To prevent static buildup, the dust collection bags should be made from anti-static fiber materials, which help eliminate static charges as the powder enters the system. Additionally, using conductive materials for air supply ducts and connecting parts ensures that any accumulated static charge can be safely dissipated. Other effective methods include increasing pipe diameters, reducing bends, regular cleaning, and requiring operators to wear anti-static clothing.
When it comes to preventing dust explosions, several critical steps must be taken. First, all potential ignition sources must be eliminated, and explosion suppression systems should be installed where necessary. Explosion-proof membranes or pressure relief valves should also be incorporated into dust removal equipment and pipelines. Regular cleaning of pipes and dust collection bags is crucial to prevent dust accumulation, which can lead to dangerous conditions. Using explosion-proof electrical components, such as motors and grounded wiring, further enhances safety. Moreover, the plant design should follow anti-explosion standards, including sufficient pressure relief areas.
In practice, companies like Changzhou Changhong Drying Equipment Co., Ltd. have integrated these measures into their equipment. Their explosion-proof granulation coating machine features multi-stage filtration, an exhaust fan with a silencer, and a closed process from inlet to exhaust, improving efficiency and energy savings. The device includes two dust collection chambers with anti-static bags, automatic pressure control, and an easy-to-operate bag replacement system that eliminates the need for high-altitude work.
The main unit is equipped with explosion-proof devices. If internal pressure rises beyond safe limits, the system triggers a shutdown, closing fast valves and releasing the excess pressure through an explosion vent. This has been tested by the Tianjin Pharmaceutical Machinery Testing Center, confirming that the explosion door opens automatically when pressure exceeds 0.8 kg/cm².
Electrical components are also designed with explosion-proof features, including explosion-proof fans and lights. Safety grounding and proper installation procedures are emphasized in the manuals, ensuring compliance with overall grounding requirements.
This advanced equipment not only offers granulation, coating, and drying functions but also meets strict explosion-proof standards, making it suitable for use in pharmaceutical, food, and chemical industries. Overall, the integration of these safety measures highlights the growing importance of explosion-proof design in modern drying systems.
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