Centralized negative pressure supply pneumatic conveying project for carbon black powder in Taizhou
At a carbon black production enterprise in Taizhou, Zhejiang, traditional manual handling and positive pressure conveying methods have long faced serious dust leakage, frequent pipeline blockages, and high equipment maintenance costs. As an ultra-fine, low-density, highly adhesive material, carbon black powder easily disperses during transportation, causing raw material waste and posing threats to the workshop environment and operator health. To address these conditions, Head Powder has deployed a negative pressure centralized pneumatic feeding system, achieving fully enclosed, automated transfer from feeding to the end of production.
Case Background
A certain company mainly produces carbon black masterbatch and specialty carbon black, with its raw carbon black needing to be transported from the warehouse to multiple batching stations. The original conveying method used manual forklifts with small bag feeding, with dust concentrations as high as 30mg/m³, and severe pipeline wear, requiring elbow replacement on average every three months.
Customer pain points
- Dust pollution is severe: Carbon black particle size is about 20-50μm, with insufficient sealing during positive pressure conveying, and PM2.5 concentration in the workshop exceeds the standard, failing to meet environmental protection requirements.
- Blocking materials and bridge construction: Carbon black easily absorbs moisture and accumulates electrostatic electricity, frequently clogging pipeline elbows and valves, leading to downtime and cleaning, which affects production efficiency.
- Energy consumption and loss: Positive pressure air compressors consume high power and cause material losses due to leakage account for about 1.5% of the total annually.
- Maintenance costs are high: Pipes wear out quickly, parts are frequently replaced, and dedicated personnel must be assigned to monitor operation 24 hours a day.
Head Powder Solutions
To address these issues, Head Powder has designed a negative pressure centralized pneumatic feeding system, with core components including a vacuum pump station, stainless steel pipelines, rotary feeding valves, automatic reverse blow filters, and centralized control cabinets. The system uses negative pressure airflow as its power source, drawing carbon black from the storage silo into the pipeline through the nozzle, passing through the gas-solid separation device before entering the point silo, operating in a sealed manner throughout.
Product advantages
- Fully enclosed negative pressure conveying: The internal working pressure of the system is -0.04~-0.06MPa, all equipment interfaces use pneumatic seals to achieve zero dust leakage, and the workshop environment complies with GBZ 2.1 occupational contact limits.
- Reliable anti-blockage design: The inner wall of the pipe is polished with a mirror finish, and the elbow area is equipped with wear-resistant ceramic lining; At the same time, by adjusting airflow through variable frequency and working with an automatic back-blowing system, static electricity accumulation and material bridging are effectively eliminated.
- Intelligent centralized management:P LC automatically controls multi-channel switching and material level interlocking, supports remote monitoring and fault alarms, enabling unattended operation and reducing manual intervention.
- Low energy consumption and low loss: At the same conveying volume, the energy consumption of the negative pressure system is only 65% of that of the positive pressure system, and the material loss rate is reduced to below 0.1%.
After the system was put online, the company's workshop dust concentration dropped below 2mg/m³, reducing material loss by about 12 tons annually, reducing equipment downtime by 80%, and lowering overall operating costs by 30%. Through a customized negative pressure centralized feeding solution, Head Powder helps the carbon black industry in Zhejiang and Taizhou achieve clean production and improve efficiency.