This article presents a detailed case study on the dense phase pneumatic conveying system for inorganic salt powder, successfully implemented in Muscat, Oman. The project was executed by Shandong Haidai Powder Engineering Co., Ltd., a leading provider of pneumatic conveying solutions based in China Shandong. The following content elaborates on the technical background, system design, application advantages, and operational outcomes of this overseas project, aiming to serve as a reference for similar industrial powder handling needs.
The client in Muscat, Oman, required a reliable and efficient material handling solution for transferring inorganic salt powder from storage silos to multiple production points. The powder is characterized by fine particle size, moderate abrasiveness, and a tendency to absorb moisture, making traditional mechanical conveyors less suitable due to issues like dust generation, product degradation, and maintenance complexity. The client specifically sought a closed, dust-free, and low-maintenance system that could handle the material over a horizontal distance of approximately 150 meters and a vertical lift of 25 meters, with a conveying capacity of 10 tons per hour. After evaluating several options, the dense phase pneumatic conveying technology, operating under positive pressure, was selected as the optimal solution.
Dense phase pneumatic conveying, also known as high-pressure low-velocity conveying, is a method where the material is transported in a slug or plug flow regime through a pipeline using compressed air. Unlike dilute phase systems that suspend particles in high-velocity air, dense phase systems operate at lower air velocities (typically 2–8 m/s) and higher material-to-air ratios. This approach is particularly advantageous for fragile or abrasive powders, as it minimizes particle attrition, reduces pipeline wear, and lowers energy consumption. For inorganic salt powder, which can be hygroscopic and prone to caking, the dense phase system ensures gentle handling while maintaining material integrity. The positive pressure configuration (also referred to as pressure conveying) pushes the material from the feed point to the destination, allowing for longer distances and multiple discharge points. In this Muscat project, the system was designed with a pressure vessel (blow tank) that feeds the powder into the pipeline, controlled by a series of valves and a PLC-based control system to regulate airflow and material flow.
The entire pneumatic conveying system was engineered to meet the specific requirements of the inorganic salt powder application in Muscat, Oman. The blow tank was made of stainless steel to resist corrosion from the salt content, and the pipeline was lined with a wear-resistant material to extend service life. The conveying line included a series of bends and diverters to route the powder to three different production machines. The control system was equipped with sensors to monitor pressure, flow rate, and material level, enabling automatic adjustment of the conveying parameters. One of the key challenges was the high ambient temperature in Oman, which could affect the moisture content of the powder. To address this, the system incorporated a dehumidification unit for the compressed air supply and a cooling jacket on the blow tank. The installation was completed within four weeks, with on-site commissioning and training provided by Shandong Haidai Powder Engineering Co., Ltd. engineers. The system achieved a consistent conveying rate of 10.5 tons per hour, exceeding the design specification, and the powder quality remained unchanged after transport.
The positive pressure dense phase pneumatic conveying system delivered several critical benefits for the Muscat facility. First, the enclosed system completely eliminated dust emissions, creating a safer and cleaner working environment, which is especially important for handling fine inorganic salt powders that can be respiratory irritants. Second, the low-velocity transport reduced pipeline abrasion significantly, lowering maintenance costs and extending equipment life. Third, the gentle handling ensured that the powder particles did not break down or generate fines, preserving the product's flowability and chemical properties. Fourth, the system's flexibility allowed for easy expansion: additional discharge points could be added without major structural changes. Fifth, compared to mechanical conveyors such as screw conveyors or bucket elevators, the pneumatic system required less floor space and had fewer moving parts, reducing downtime. The overall energy consumption was approximately 0.8 kWh per ton of material, which is competitive for this type of application. These advantages made the dense phase pneumatic conveying the preferred choice for the client's inorganic salt powder handling in Oman.
Shandong Haidai Powder Engineering Co., Ltd., headquartered in China Shandong, is a specialized engineering company focusing on the design, manufacture, and installation of pneumatic conveying systems for bulk powders and granular materials. With over 15 years of industry experience, the company has completed numerous projects both domestically and internationally, including the case in Muscat, Oman. The team offers comprehensive services from feasibility studies and system design to equipment supply, installation, and after-sales support. For inquiries regarding pneumatic conveying solutions for inorganic salt powder, dense phase conveying, or any other powder handling challenges, you can contact Manager Zhang directly. The contact number is 15662777102. Manager Zhang and the technical team are ready to provide customized solutions for your specific requirements, whether for a new project or an upgrade of existing facilities. The company's commitment to quality and innovation has made it a trusted partner in the field of pneumatic conveying worldwide.
The Muscat, Oman inorganic salt powder dense phase pneumatic conveying project stands as a testament to the effectiveness and reliability of this technology for challenging materials. The collaboration between the client and Shandong Haidai Powder Engineering Co., Ltd. resulted in a system that not only met but exceeded performance expectations. The key takeaways include the importance of proper system design tailored to the material properties, the advantages of dense phase conveying for fragile and abrasive powders, and the value of an experienced engineering partner. For any industrial facility considering the adoption of pneumatic conveying for inorganic salt powder or similar materials, this case study provides a solid reference. The dense phase positive pressure system offers a clean, efficient, and durable solution that can be adapted to various site conditions. To discuss your specific project, please contact Manager Zhang at 15662777102. Shandong Haidai Powder Engineering Co., Ltd. looks forward to supporting your powder handling needs with professional expertise and proven technology.
Shandong Headpowder Engineering Co., Ltd.
156-6277-7102（Manager Zhang） 
0531-83386006 
Jinan City, Shandong Province, China 
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