This article presents a detailed case study of a nitrogen-protected pneumatic conveying system for metal powders, specifically implemented in Ayutthaya (Phra Nakhon Si Ayutthaya), Thailand. The project was successfully delivered by Shandong Haide Powder Engineering Co., Ltd., a leading provider of pneumatic conveying solutions in China. The system is designed to handle fine metal powders safely and efficiently under a nitrogen atmosphere, ensuring explosion-proof and oxidation-free material transfer. This instance serves as a benchmark for international pneumatic conveying applications, particularly in the Southeast Asian market.
The customer, a metal powder processing plant located in Ayutthaya, Thailand, required a reliable and safe method to convey fine metal powders from storage silos to downstream packaging stations. The primary challenge was that the metal powders are highly reactive and prone to oxidation or dust explosion when exposed to air. Conventional mechanical conveying methods, such as screw conveyors or belt conveyors, could not guarantee the necessary inert atmosphere. Therefore, the customer specifically requested a nitrogen-protected pneumatic conveying system. The key requirements included: maintaining an oxygen concentration below 5% throughout the conveying pipeline, minimizing particle degradation, achieving a conveying capacity of 2-5 tons per hour, and providing a fully sealed, dust-free operation. Additionally, the system had to be compact and easy to integrate into the existing factory layout in Ayutthaya.
To meet these stringent requirements, Haide Powder Engineering designed a dense-phase pneumatic conveying system with nitrogen gas as the carrier medium. The system consists of a pressure vessel feeder, a nitrogen supply unit, a conveying pipeline, a cyclone separator, a bag filter, and a control panel. The nitrogen gas is supplied from a liquid nitrogen tank and regulated to a pressure of 0.3-0.6 MPa. The metal powder is fed into the pressure vessel, where it is fluidized by nitrogen and then transported through the pipeline in a plug flow pattern. This dense-phase conveying method significantly reduces gas velocity, thereby minimizing abrasion and particle breakage. The entire system is fully enclosed, and the oxygen content is continuously monitored by oxygen sensors. When the oxygen level exceeds the set threshold, the control system automatically purges the pipeline with additional nitrogen. The system also features a pressure relief valve and a grounding system to prevent static electricity buildup. This Thailand pneumatic conveying project demonstrates how advanced engineering can address the specific challenges of metal powder handling in tropical climates.
This nitrogen-protected pneumatic conveying system offers several distinctive advantages. Firstly, the use of nitrogen gas creates an inert atmosphere that effectively prevents oxidation and combustion of the metal powders. This is critical for materials such as aluminum powder, magnesium powder, or titanium powder, which have high reactivity. Secondly, the dense-phase conveying mode ensures gentle handling of the powder, preserving particle shape and size distribution. Thirdly, the system is designed for low energy consumption compared to dilute-phase systems, as the gas-to-solid ratio is optimized. Fourthly, the control system is fully automated, with PLC-based logic that manages the filling, conveying, and discharge cycles. The system also includes a remote monitoring interface, allowing operators in Ayutthaya to oversee the process from a central control room. The entire installation is modular, enabling easy maintenance and future expansion. This Ayutthaya pneumatic conveying case is a perfect example of how Haide's expertise in powder handling can be adapted to different geographical and operational contexts.
Shandong Haide Powder Engineering Co., Ltd. provided comprehensive on-site installation and commissioning support for this project. A team of experienced engineers traveled to Ayutthaya to supervise the mechanical assembly, electrical wiring, and piping connections. The local team in Thailand collaborated closely with Haide's engineers to ensure compliance with local safety standards and building codes. The commissioning phase involved a series of tests, including leak tests, nitrogen purging tests, and full-load conveying trials. During the trials, the system successfully conveyed metal powder at a rate of 3.5 tons per hour while maintaining an oxygen concentration below 2%. The system also demonstrated excellent stability during continuous operation for 8 hours. The customer was highly satisfied with the performance and reliability. For any further inquiries about this project or similar pneumatic conveying solutions, please contact Manager Zhang of Shandong Haide Powder Engineering Co., Ltd. at 15662777102. The company is based in Shandong, China, and has extensive experience in exporting pneumatic conveying equipment to Southeast Asia.
For metal powder manufacturers in Thailand and other regions, adopting a nitrogen-protected pneumatic conveying system brings multiple benefits. The most important advantage is safety. Metal dust explosions are a serious hazard in powder handling facilities, and the nitrogen atmosphere effectively eliminates the risk of ignition. Additionally, the system prevents product contamination, because the powder never comes into contact with ambient air or moisture. This results in higher product purity and consistency. The pneumatic conveying method also reduces manual handling, lowering labor costs and improving workplace hygiene. The system is inherently dust-tight, which is essential for meeting environmental regulations. Furthermore, the modular design allows for easy integration with existing equipment such as mixers, bagging machines, and storage silos. This Thailand pneumatic conveying case study has been widely referenced by other metal powder producers in the region. If you are interested in a similar solution for your facility, please do not hesitate to reach out to Manager Zhang at 15662777102. Shandong Haide Powder Engineering Co., Ltd. is committed to providing customized pneumatic conveying systems tailored to your specific material properties and production requirements.
Shandong Headpowder Engineering Co., Ltd.
156-6277-7102（Manager Zhang） 
0531-83386006 
Jinan City, Shandong Province, China 
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