Targeting the physical characteristics of sodium sulfate (Glauber’s salt, anhydrous sodium sulfate), including easy caking, high moisture content and corrosiveness, the machine adopts corrosion-resistant stainless steel and speed-adjustable scraper systems to avoid material wall adhesion and equipment corrosion.
It features strong adaptability and can process sodium sulfate slurry, filter cake and paste materials with 30%~60% moisture content. The final moisture content is ≤0.1%, fully meeting industrial first-grade product standards.
Steam or thermal oil is introduced inside the drum for indirect conductive heating. Its thermal efficiency is over 40% higher than traditional hot-air convection drying, with steam consumption as low as 0.5~0.8 tons per ton of material.
Dynamic scraper flipping spreads materials into a uniform thin layer of 15 mm, shortening the drying cycle to only 1030 minutes.
Full-process continuous operation of feeding, drying and discharging eliminates frequent shutdown cleaning. The single machine daily capacity reaches 50~100 tons, supporting large-scale industrial production.
Fully enclosed structure ensures dust leakage ＜5 mg/m³, complying with environmental protection and clean workshop standards.
Screw extrusion pre-molding technology shapes high-moisture sodium sulfate filter cake into strips or granules before drum drying, fundamentally reducing caking risks.
Segmented temperature control is adopted: the front high-temperature zone (120150℃) rapidly evaporates surface moisture; the rear low-temperature zone (80100℃) performs deep drying of bound water and prevents crystal pulverization caused by overheating.
The scraper angle and rotating speed adjust automatically according to material humidity to ensure uniform thin-layer spreading and avoid local over-drying or under-drying.
Drying exhaust vapor passes through a condenser for water recycling, and the recovered waste heat preheats incoming materials, reducing comprehensive energy consumption by 15%~20%.
Dehydrate Glauber’s salt (Na₂SO₄·10H₂O) to produce anhydrous sodium sulfate, replacing traditional hot-air furnace and belt drying processes to solve high energy consumption and exhaust pollution problems.
Recycle and reuse sodium sulfate-containing waste liquid and by-products, widely applied in lithium battery recycling and dye wastewater treatment.
Dry sodium sulfate mother liquor after lithium extraction from salt lakes to realize efficient utilization of by-products in the lithium battery industrial chain.
Original Pain Points: Traditional pneumatic drying consumed 1.2 tons of steam per ton of material, with unstable moisture content ranging from 0.1% to 0.5%. Frequent scaling caused unplanned shutdowns.
Solution: Customized drum scraper dryer (Diameter 2.5m, Length 8m) equipped with screw pre-forming machine and waste heat recovery system.
Operation Results:
Small test equipment (50kg/h) is available. Customers can send raw materials, and complete drying reports including moisture content, particle size and energy consumption data will be delivered within 3 days.
Material grade (titanium alloy, Hastelloy) and scraper structure can be adjusted according to material characteristics such as chloride ion content and pH value.
Old equipment renovation service is supported. The original production line frame can be retained while only replacing the core drying unit to lower investment costs.
Short videos of the full drying process are provided, showing the whole transformation from sticky wet filter cake to dry powder, with intuitive data comparison of energy consumption and product quality before and after renovation。