In March 2025, after providing on-site installation and commissioning services for a silicochemical project in Zhejiang, engineers from Greatwall Mixers successfully completed the mixing equipment setup. The core equipment of this project is a concentration evaporator.

About the Silicochemical Industry

Silicochemical refers to the chemical sector that utilizes silicon and its compounds as primary raw materials. The products in this industry include silicone oils, silicone rubber, silicone resins, silane coupling agents, and more. These products are widely used in industries such as electronics, construction, automotive, and aerospace due to their high-temperature resistance, corrosion resistance, and excellent insulation properties. They play a crucial role across many industrial applications.

Industry Challenges: Issues in Silicochemical Processes

During the production process in silicochemicals, concentration evaporators serve as the core equipment but face several complex process challenges. As the concentration process progresses, the viscosity of the silicochemical solution increases, leading to reduced fluidity and mixing efficiency, ultimately impacting the concentration effect. At the same time, solid particles tend to accumulate at the bottom of the evaporator, not only reducing the stability of equipment operation but also potentially causing local heat transfer issues, which in turn affects the uniformity and consistency of the final product. These process bottlenecks represent key challenges in improving concentration efficiency and optimizing product quality in the silicochemical industry, requiring innovative equipment design and process optimization to address.

Selection of Mixing Equipment: Three-Layer Large-Diameter Impeller Design

To address the process challenges of the silicochemical concentration evaporator, this project implemented a three-layer large-diameter impeller design, which demonstrated excellent process optimization results. The upper and middle layers feature four inclined, detachable turbine-style impellers. With their powerful radial and axial flow-driving capabilities, these impellers ensure full-range liquid circulation even under high-viscosity conditions, effectively preventing stratification and ensuring uniform liquid-solid phase dispersion. This significantly improves the mixing effect under high-viscosity conditions. The bottom layer uses a dual-angled, conical-bottom impeller that generates a good disturbance effect at the bottom of the evaporator, preventing solid particle accumulation. The conical design and high shear forces also enhance local turbulent mixing, greatly improving heat and mass transfer efficiency.

This impeller configuration not only achieves uniform mixing, deposition removal, and efficient energy utilization but also ensures stable reaction conditions, significantly enhancing the process performance and product quality of the silicochemical concentration evaporator.

In the Zhejiang silicochemical project, Greatwall Mixers’ three-layer impeller design effectively solved the process challenges of high-viscosity mixing, solid deposition, and low heat and mass transfer efficiency in the concentration evaporator. As a result, production efficiency and product quality were significantly enhanced. This solution provides valuable technical support to the silicochemical industry and offers useful insights for similar solid-containing evaporation systems.

Looking ahead, Greatwall Mixers will continue to focus on technological innovation and strive to provide efficient, reliable mixing equipment to support customers, promote cost reduction, improve efficiency, and contribute to the sustainable development of the industry.