Case Study of a Coal Powder Mixed Pneumatic Conveying Project in a Coal Enterprise in Taiyuan, Shanxi

Shanxi Taiyuan Coal Enterprise Pulverized Coal Mixed Pneumatic Conveying Project Case Study

Project Overview and Background

In the heart of Shanxi Province, Taiyuan stands as a pivotal hub for coal mining and energy production. One of the region's leading coal enterprises recently faced a critical challenge: efficiently transporting pulverized coal with high moisture content and varying particle sizes from storage hoppers to multiple downstream processes. Traditional mechanical conveying systems suffered from frequent blockages, dust emissions, and high maintenance costs. To address these issues, the enterprise partnered with Shandong Headpowder Engineering Co., Ltd., a specialist in pneumatic conveying solutions. The core objective was to design and implement a reliable, dust-free, and energy-efficient pulverized coal mixed pneumatic conveying system capable of serving multiple discharge points simultaneously. This case study outlines the technical approach, key equipment, and operational benefits achieved through the deployment of mixed pneumatic conveying technology.

Technical Solution: Pulverized Coal Mixed Pneumatic Conveying

The heart of the project lies in the pulverized coal mixed conveying system, which combines dense-phase and dilute-phase principles to handle the unique characteristics of coal fines. Shandong Headpowder's engineers conducted a thorough analysis of the material properties, including bulk density, moisture content, and abrasiveness. They then designed a custom mixed pneumatic conveying circuit that uses a combination of positive pressure and vacuum assistance to maintain steady flow. The system features a specially designed mixing chamber where compressed air is injected at controlled ratios to create a homogeneous air-coal mixture. This approach prevents segregation and ensures consistent transport velocity, even when the coal powder contains up to 15% moisture. The mixed pneumatic conveying technology employed here reduces pipe wear by 30% compared to conventional dilute-phase systems, while cutting energy consumption by 20% due to optimized air-to-material ratios. This solution is particularly suited for coal enterprises that require reliable transfer of sticky or cohesive powders.

Multi-Point Collection and Conveying Architecture

One of the most demanding requirements of this project was the need for multi-point collection and conveying. The coal enterprise operates multiple pulverizer mills and storage silos distributed across a large footprint. To serve all these sources efficiently, Shandong Headpowder implemented a multi-point pneumatic conveying network with automatic switching valves. Each feed point is equipped with a rotary airlock feeder and a diverting valve that directs the material into the common conveying line. The system uses a PLC-based controller that monitors pressure, flow rate, and material level at each point, enabling seamless switching between sources without interrupting the main pipeline. This multi-point collection and conveying design eliminates the need for separate dedicated lines for each source, significantly reducing capital investment and floor space. The system can handle up to 12 individual feed points with a total conveying capacity of 25 tons per hour over a distance of 350 meters. The multi-point capability ensures that the coal enterprise can consolidate its pulverized coal handling into a single, streamlined process.

Mixed Pneumatic Conveying Engineering Expertise

The success of this project relied heavily on Shandong Headpowder's deep expertise in mixed pneumatic conveying engineering. The company's engineering team performed computational fluid dynamics (CFD) simulations to model the two-phase flow behavior inside the pipeline, optimizing the air velocity, pressure drop, and pipe diameter for the specific coal powder characteristics. They also designed a proprietary booster system that injects additional air at strategic intervals along the pipeline to prevent settling and plugging. The entire mixed pneumatic conveying engineering package included not only the conveying line but also the filtration system, silo venting, and dust collection units. Shandong Headpowder provided turnkey installation, commissioning, and operator training. The engineering approach prioritized system reliability: all components, from the air compressors to the control valves, were selected for high abrasion resistance and easy maintenance. The result is a robust conveying system that has operated continuously for over 18 months with less than 1% unscheduled downtime.

Key Equipment and Operational Advantages

The pulverized coal mixed pneumatic conveying system deployed at the Taiyuan site includes several key components: a positive displacement blower, a mixing hopper, a rotary airlock feeder, a series of diverting valves, and a baghouse filter. The system operates at a conveying pressure of 0.6 bar, achieving a material-to-air ratio of 8:1. One of the major operational advantages is the drastic reduction in dust emissions. Enclosed pipelines and sealed connections ensure that no coal dust escapes into the environment, meeting strict local air quality standards. Additionally, the system's low maintenance design—featuring easy-access cleanout ports and wear-resistant ceramic liners—has reduced annual maintenance costs by 40% compared to the previous mechanical conveyor system. The energy efficiency of the mixed pneumatic conveying approach also contributed to a 15% reduction in overall plant power consumption. For the coal enterprise, this translates to significant cost savings and improved environmental compliance.

Company Profile: Shandong Headpowder Engineering Co., Ltd.

Shandong Headpowder Engineering Co., Ltd., headquartered in Shandong, China, is a leading provider of pneumatic conveying solutions for the coal, mining, and chemical industries. With a strong focus on innovation, the company has developed a comprehensive portfolio of technologies including dense-phase conveying, dilute-phase conveying, and mixed pneumatic conveying systems. Their engineering team has completed over 200 projects worldwide, ranging from single-point transfer to complex multi-point collection networks. The company's commitment to quality is reflected in their ISO 9001 certification and rigorous testing procedures. For more information about this project or similar applications, please contact the project manager, Mr. Zhang, via WeChat at 15662777102. Mr. Zhang has extensive experience in coal powder handling and can provide detailed technical consultation for your specific conveying needs.

Implementation Results and Client Feedback

Following the commissioning of the pulverized coal mixed pneumatic conveying system, the Taiyuan coal enterprise reported immediate improvements in production efficiency. The system consistently delivers the required coal powder to six different furnace feed points without any bridging or blockages. The plant manager noted that the elimination of manual cleaning and unplugging operations has freed up two maintenance workers per shift, allowing them to focus on other critical tasks. The dust-free operation also improved worker safety and reduced the frequency of respiratory health issues. In terms of scalability, the system's modular design allows for easy expansion to additional feed points in the future. The client expressed high satisfaction with the technical support provided by Shandong Headpowder Engineering Co., Ltd., particularly during the commissioning phase when the team worked around the clock to fine-tune the control parameters. This case demonstrates how mixed pneumatic conveying engineering can solve real-world challenges in coal handling, delivering measurable operational and environmental benefits.

Contact Information for Project Inquiries

For enterprises considering similar pulverized coal mixed conveying or multi-point collection and conveying solutions, Shandong Headpowder Engineering Co., Ltd. offers free technical assessments and feasibility studies. The company's engineers can visit your site to analyze material properties and design a customized system tailored to your requirements. To schedule a consultation, please reach out to the project manager, Mr. Zhang, directly via WeChat at 15662777102. Mr. Zhang can provide detailed case studies, equipment specifications, and reference list from previous projects in the coal industry. Shandong Headpowder is located in Shandong, China, and serves clients globally. Whether you need a single conveying line or a complex multi-point network, their team is ready to deliver reliable, energy-efficient solutions for your pulverized coal handling needs.