Shaanxi Yan'an slaked lime powder silo pump dense phase conveying general contracting project
In a slaked lime powder conveying project in Yan'an, Shaanxi, the client has long faced many challenges caused by traditional mechanical conveying methods. Slaked lime, as a highly humid, highly viscous, and dust-generating powder material, is not only caused by conventional screw or belt conveying on site that causes dust to spread and severely pollute the environment, but also leads to frequent material blockages and equipment wear, resulting in high maintenance costs. At the same time, heavy reliance on manual operations makes conveying efficiency difficult to stabilize, restricting the overall capacity improvement of the production line.
Customer pain points
The company's original conveying system mainly had the following issues: First, severe dust leakage during conveying did not meet environmental protection regulations; Second, the equipment failure rate is high, requiring weekly shutdowns to clear blockages, affecting continuous production; Third, energy consumption is too high, with an unreasonable gas-to-solid ratio in pneumatic conveying, resulting in energy waste; Fourth, slaked lime easily absorbs moisture and forms clumps. Traditional open conveying methods cannot effectively control material moisture, affecting subsequent process quality.
Product advantages and solutions
To address these pain points, Head Powder designed a dense-phase pneumatic conveying system for the silo pump. This scheme adopts the principle of low-pressure dense phase conveying, achieving closed delivery of slaked lime through high-concentration, low-speed material flow. As core equipment, the silo pump can effectively prevent material backflow and leakage, helping to prevent dust leakage throughout the entire conveying process. At the same time, the system is equipped with an intelligent control system that can automatically adjust air volume and pressure according to material characteristics, preventing blockages and pipeline wear, thereby reducing energy consumption. After the upgrade, on-site dust concentration dropped below safety thresholds, the continuous operation cycle of the equipment was extended from 72 hours to over 30 days, and overall energy consumption was reduced by 30% compared to the original plan.
Additionally, considering the dry climate and large temperature differences in the Yan'an area, the system has specially added heat tracing and insulation designs to prevent condensation and compacting of slaked lime caused by temperature changes. The conveying distance covers all key workstations in the factory, up to 150 meters, with a material crushing rate below 1%, fully supporting the stability of downstream processes. Currently, this case has been operating normally for over 18 months, becoming a benchmark project for local slaked lime pneumatic conveying.