This case study presents a specialized pneumatic conveying project undertaken by Shandong Headpowder Engineering Co., Ltd. for a chemical enterprise located in Tianjin, China. The project focuses on the safe and efficient transport of organic peroxide powder, a highly reactive and flammable material, using a nitrogen circulation system. Organic peroxides are widely used as initiators, crosslinking agents, and curing agents in polymer production, but their instability and explosion risk demand extremely careful handling. The client required a closed-loop conveying solution that eliminates oxygen, minimizes dust explosion hazards, and maintains product integrity. Headpowder, with its extensive experience in powder handling systems, designed and implemented a customized nitrogen circulation pneumatic conveying system that fully meets these stringent safety and performance requirements.
Organic peroxide powders are classified as flammable and explosive substances. Under normal conditions, they can decompose rapidly when exposed to heat, friction, impact, or contamination. Traditional mechanical conveying methods such as screw conveyors or belt conveyors introduce risks of dust accumulation, static electricity, and mechanical sparks. Moreover, the presence of oxygen in the conveying environment can trigger combustion or even detonation. The Tianjin chemical enterprise faced specific difficulties: the powder had a tendency to cake and bridge, causing blockages; the material temperature needed to be controlled to prevent premature decomposition; and the system had to be fully sealed to avoid any leakage of toxic or reactive dust. Without a specialized solution, production efficiency was compromised, and safety compliance could not be guaranteed. The enterprise sought a reliable partner capable of delivering a turnkey nitrogen circulation pneumatic conveying system tailored to organic peroxide powder.
Shandong Headpowder Engineering Co., Ltd. proposed a closed-loop nitrogen circulation pneumatic conveying system specifically designed for the transport of organic peroxide powder. In this system, nitrogen gas is used as the conveying medium instead of compressed air, effectively eliminating oxygen and creating an inert atmosphere. The nitrogen is continuously recycled through a closed circuit: after conveying the powder, the nitrogen returns to the gas source, where it is filtered, cooled, and reconditioned before being reused. This approach not only ensures explosion-proof operation but also reduces nitrogen consumption and operational costs. The conveying pipeline is constructed from stainless steel with smooth internal surfaces to prevent powder adhesion and minimize friction. Specialized rotary valves, diverter valves, and cyclone separators are integrated to handle the fine, sticky nature of the organic peroxide. The system is equipped with real-time monitoring of oxygen concentration, temperature, pressure, and flow rate, with automatic shutdown triggers if any parameter exceeds safe limits. Headpowder's design also includes a dust collection and recovery unit to capture any fine particles, ensuring zero emissions and full material recovery.
The nitrogen circulation pneumatic conveying system offers multiple advantages for handling flammable and explosive organic peroxide powders. First and foremost, safety: the inert nitrogen atmosphere eliminates the risk of dust explosion, and all components are grounded and explosion-proof rated. Second, process reliability: the closed-loop design prevents moisture ingress and contamination, maintaining the chemical purity of the organic peroxide. The system is also highly energy-efficient because the nitrogen is recycled, reducing the need for continuous fresh gas supply. Third, gentle conveying: the low-velocity pneumatic transport minimizes particle breakage and degradation, preserving the product quality. Fourth, environmental protection: the system is fully sealed, preventing dust leakage into the workshop and protecting operator health. Fifth, automation and control: a PLC-based control system enables remote monitoring, automatic cleaning cycles, and integration with the plant's existing distributed control system. For the Tianjin chemical enterprise, these features translated into higher throughput, lower maintenance downtime, and compliance with the strictest safety regulations for organic peroxide handling.
In this specific project, the Tianjin chemical enterprise needed to convey organic peroxide powder from a storage silo to multiple blending and packaging stations located at different elevations and distances. The material had a bulk density of approximately 0.5–0.7 g/cm³ and a particle size distribution ranging from 50 to 200 microns. The conveying distance was about 80 meters with a vertical lift of 15 meters. Headpowder's engineering team conducted a thorough site survey and risk assessment, then designed a nitrogen circulation system with a conveying capacity of 2 tons per hour. The system includes a nitrogen generator, a gas circulation compressor, a cyclone separator, a bag filter, and a closed-loop piping network. All components are made of 316L stainless steel with electropolished surfaces. The oxygen concentration in the loop is maintained below 2% by volume, well below the limiting oxygen concentration for the specific organic peroxide. The project was completed within the scheduled timeline, and the system passed all safety and performance acceptance tests. The client reported a 30% reduction in nitrogen consumption compared to an open-loop system, and zero safety incidents during the first year of operation.
Shandong Headpowder Engineering Co., Ltd. (Headpowder) is a leading provider of powder handling solutions, specializing in pneumatic conveying, dust collection, and mixing systems for hazardous materials. With over a decade of experience in the field, Headpowder has successfully delivered projects for chemical, pharmaceutical, food, and battery material industries. The company's engineering team possesses deep expertise in designing nitrogen circulation systems for flammable and explosive powders, including organic peroxides, metal powders, and pharmaceutical intermediates. Headpowder offers comprehensive services from process design, equipment manufacturing, installation supervision, commissioning, to after-sales support. The company's headquarters and manufacturing base are located in Shandong, China, with a global client network. For any inquiries regarding organic peroxide powder conveying, nitrogen circulation systems, or other powder handling challenges, please contact Manager Zhang directly via WeChat: 15662777102. Manager Zhang is the head of the technical sales department and can provide detailed project references and customized solution proposals.
For more information about the organic peroxide powder nitrogen circulation pneumatic conveying system or to discuss your specific project requirements, please reach out to the Headpowder team. The primary contact is Manager Zhang, who can be reached through WeChat at 15662777102. Manager Zhang is available to answer technical questions, arrange virtual meetings, or schedule a site visit to the Headpowder facility in Shandong, China. Headpowder looks forward to partnering with you to deliver a safe, efficient, and reliable powder conveying solution for your flammable and explosive materials.
Shandong Headpowder Engineering Co., Ltd.
156-6277-7102（Zhang manager） 
0531-83386006 
Jinan City, Shandong, China Province 
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