Low-Cost Driven, Green Transformation Empowered: The Full-Cycle Value of Stainless Steel Screw Conveyors

A chemical plant's existing carbon steel screw conveyor suffered severe corrosion when handling acid-containing waste residue, with equipment lifespan falling below three months. Frequent shutdowns severely disrupted continuous production. In 2023, the plant upgraded to a stainless steel screw conveyor, significantly improving system efficiency.

This stainless steel conveyor offers multiple technical advantages: constructed from 304/316L stainless steel, it exhibits broad corrosion resistance (suitable for pH 2–12) with tensile strength no less than 520 MPa; its modular design facilitates maintenance, while the sealed structure effectively prevents dust leakage. Intelligent speed regulation achieves energy savings of 15%–20%.

In practical application, the equipment handles 50 tons daily of acidic waste residue (pH 3–5) and chloride-containing catalysts, maintaining dust emission concentrations below 10 mg/m³—exceeding industry standards. Process parameter comparisons reveal equipment lifespan extended from 3 months to over 5 years, with significantly reduced maintenance frequency and concurrent energy savings.

Post-retrofit, the enterprise's annual maintenance costs decreased by 80%, while dust leakage rates dropped from 15% to 0.5%, effectively mitigating environmental compliance risks. For high-temperature materials, custom high-temperature-resistant materials and cooling jackets were added, further expanding the equipment's applicability.

This case demonstrates the reliability and applicability of stainless steel screw conveyors in highly corrosive environments, providing practical guidance for industry equipment upgrades. Systematic optimization through material selection, structural design, and operational standards delivers efficient, viable equipment solutions for chemical enterprises pursuing green transformation.