Case Study of Dense Phase Pneumatic Conveying of Soda Ash Project for a Glass Enterprise in Bengbu, Anhui

In the competitive landscape of glass manufacturing, raw material handling efficiency directly impacts production quality and operational costs. This case study examines a successful implementation of a dense phase pneumatic conveying system for soda ash, supplied by Shandong Headpowder Engineering Co., Ltd., to a prominent glass production facility located in Bengbu, Anhui Province. The project demonstrates how advanced dense phase conveying technology can optimize the transfer of fragile and abrasive materials like soda ash, ensuring consistent feed rates, minimal degradation, and reduced energy consumption.

Project Background and Customer Requirements

The client, a leading glass manufacturer in Bengbu, faced challenges with their existing mechanical conveying system for soda ash. Frequent blockages, high dust emissions, and significant material degradation led to increased maintenance costs and inconsistent glass batch quality. They sought a reliable, enclosed, and low‑velocity conveying solution that could handle soda ash — a free‑flowing yet slightly cohesive powder — over a distance of approximately 120 meters with multiple bends. The system needed to deliver a capacity of 15 tons per hour with a conveying pressure below 3 bar to maintain particle integrity. After evaluating several suppliers, they selected Shandong Headpowder Engineering Co., Ltd. (Headpowder) based on the company’s proven expertise in dense phase pneumatic conveying systems for glass raw materials, including soda ash, silica sand, and other batch ingredients.

Technical Solution: Dense Phase Pneumatic Conveying System

Headpowder designed a fully automated dense phase conveying system tailored specifically for soda ash. Unlike dilute phase systems that use high air velocities and cause particle attrition, the dense phase approach employs a low air‑to‑material ratio, allowing the soda ash to be transported in a plug‑flow pattern at velocities typically below 8 m/s. This preserves the physical and chemical properties of the soda ash, which is critical for maintaining the correct melting characteristics in the glass furnace. The system includes a pressure vessel (blow tank) with a capacity of 5 cubic meters, a series of pinch valves for precise flow control, and a dedicated PLC‑based control panel that integrates with the client’s existing plant DCS. The conveying line is constructed from wear‑resistant carbon steel with internal ceramic lining at bend sections to extend service life. The system also incorporates a baghouse filter at the receiving end to ensure zero dust emission, meeting strict environmental regulations.

Key Features of the Dense Phase Soda Ash Conveying System

Several innovative features were implemented in this project. First, the use of a dual‑stage pressure control strategy ensures stable plug formation even when the soda ash moisture content varies slightly. Second, a proprietary flow‑aid injection system introduces a small amount of compressed air at strategic points along the pipeline to prevent bridging and compaction. Third, the system is equipped with real‑time mass flow meters and pressure transmitters, enabling continuous monitoring and adjustment of conveying parameters. The dense phase conveying system also reduces energy consumption by up to 40% compared to the previous dilute phase setup, because less compressed air is required per ton of material conveyed. Moreover, the enclosed design eliminates dust leakage, improving workplace safety and reducing cleaning downtime. The system supports both continuous and batch modes, allowing the glass plant to flexibly match the feeding rate to the furnace demand.

Installation and Commissioning Process

The installation was carried out over a period of six weeks, with a team of three field engineers from Headpowder supervising the on‑site work. The existing mechanical conveyors were removed, and the new pressure vessel, piping, and control cabinets were installed in the limited space between the soda ash silo and the batch mixing house. The commissioning phase included a 72‑hour continuous run test, during which the system delivered 15.2 tons per hour of soda ash with a conveying pressure of 2.6 bar, well within the design specifications. The final acceptance test demonstrated that the particle size distribution of the conveyed soda ash showed less than 0.5% attrition, compared to over 3% with the old system. The client’s quality control team confirmed that the glass batch homogeneity improved significantly, leading to a reduction in melting defects.

Operational Results and Client Feedback

Since the system went live, the glass plant has experienced a 30% reduction in maintenance costs related to raw material handling. The elimination of dust emissions has also improved the working environment for operators. The plant manager praised the system’s reliability, noting that unplanned downtime due to material blockages dropped from an average of 4 hours per week to nearly zero. The energy savings, combined with lower material loss, resulted in an estimated payback period of less than 18 months. The client has since ordered a second dense phase conveying system for silica sand, also from Shandong Headpowder Engineering Co., Ltd., to replicate the success. This case study serves as a benchmark for other glass manufacturers seeking to upgrade their raw material conveying infrastructure.

Why Choose Shandong Headpowder Engineering Co., Ltd. for Dense Phase Conveying

Headpowder, headquartered in Shandong, China, has been a leader in the design and manufacture of dense phase pneumatic conveying systems for over a decade. The company specializes in handling challenging powders such as soda ash, calcium carbonate, fly ash, and various chemical additives used in the glass, ceramics, and building materials industries. Their engineering team provides customized solutions that consider material properties, conveying distance, and site constraints. Each system is backed by comprehensive after‑sales support, including remote monitoring, spare parts availability, and on‑site training. For glass raw material conveying projects, Headpowder’s dense phase systems offer the best balance of gentle handling, low energy consumption, and high reliability. For inquiries or to discuss your specific conveying requirements, please contact the company’s sales manager, Mr. Zhang, via WeChat: 15662777102. Mr. Zhang and his team are ready to provide professional consultation and a detailed system proposal.

Conclusion

The Bengbu glass enterprise case clearly illustrates the advantages of adopting a dense phase pneumatic conveying system for soda ash and other glass raw materials. By partnering with Shandong Headpowder Engineering Co., Ltd., the client achieved significant improvements in product quality, operational efficiency, and environmental compliance. The project not only solved the immediate conveying challenges but also set a new standard for raw material handling in the glass industry. If you are evaluating a similar application for soda ash dense phase conveying, glass raw material conveying, or any dense phase powder conveying system, feel free to reach out to Mr. Zhang at WeChat: 15662777102 for expert guidance and a tailored solution from Headpowder.