In the context of powder processing within boiling and drying equipment, ensuring safety is crucial to prevent potential hazards such as static electricity buildup and dust explosions. While some literature exists on addressing these risks, there is still a need for more comprehensive preventive measures tailored to this specific equipment type.
To address static electricity concerns in boiling drying systems, several effective strategies can be implemented. First, using anti-static fiber materials for the dust collection bags helps eliminate static charges that may accumulate during the process. This prevents powder from adhering to the bag or becoming airborne, reducing the risk of electrostatic discharge. Second, the air supply ducts and connecting components should be constructed from conductive materials, ensuring proper grounding throughout the system. This allows static charges to be dissipated safely rather than accumulating. Additional measures include increasing pipe diameters, minimizing bends, regularly cleaning and discharging material, and requiring operators to wear anti-static clothing. These steps collectively help suppress and reduce static electricity, enhancing overall safety.
Regarding dust explosion prevention, it is essential to eliminate ignition sources by installing explosion suppression systems where necessary. Explosion-proof membranes or pressure relief valves should be integrated into dust collection systems and pipelines to manage overpressure effectively. Regular maintenance is also critical—dust accumulation in pipes and filters must be removed consistently to prevent explosive conditions. Electrical equipment should be equipped with explosion-proof features, such as explosion-proof motors and grounded wiring systems. Moreover, the facility design should follow anti-explosion standards, including sufficient pressure relief areas to minimize damage in case of an incident.
In practice, many companies have adopted basic explosion-proof measures, often due to outdated equipment or a lack of awareness. However, as safety consciousness increases and the complexity of materials grows, more advanced explosion-proof solutions are now being prioritized. For example, Changzhou Changhong Drying Equipment Co., Ltd. has developed a new explosion-proof granulation coating machine that integrates multiple layers of safety features. The system includes multi-stage air filtration, a silencer-equipped induced draft fan, and a fully enclosed granulation and coating process, which improves efficiency and energy savings.
The dust collection system uses anti-static filter bags, and the pressure difference across the filter is automatically monitored and controlled to maintain optimal fluidization. The equipment features two dust collection chambers, each with a dedicated bag. A unique airbag structure ensures secure sealing without requiring operators to climb high for maintenance. Additionally, the main unit is equipped with explosion-proof devices. If internal pressure rises beyond safe limits, the system triggers a gas-to-electricity conversion, shutting down power and closing fast valves. If pressure continues to increase, the explosion-proof door opens automatically, releasing the pressure through a vent channel to protect personnel and equipment.
This machine has been tested at the Tianjin Pharmaceutical Machinery Testing Center and meets strict safety standards. It also includes explosion-proof electrical components such as fans and observation lights, along with clear instructions on grounding and installation. With its combined functions of granulation, coating, and drying, this equipment is suitable for various industries, including pharmaceuticals, food, and chemicals.
In conclusion, the importance of implementing robust safety measures against static electricity and dust explosions in boiling and drying equipment cannot be overstated. By adopting advanced designs and proactive maintenance practices, companies can significantly enhance operational safety and reduce the risk of catastrophic incidents.
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