Project Overview
In food salt processing, precise particle classification, sanitary production and stable continuous operation are core production demands. We received a customization request from a professional food salt processor, who needed a standardized food-grade screening system to classify finished salt into three particle specifications: 1.4mm, 0.71mm and 0.21mm. The customer’s core production target was to achieve a stable hourly output of 3 tonnes, with strict requirements for dust sealing, corrosion resistance and quick disassembly cleaning to meet food production safety standards.
Combining the characteristics of easy moisture absorption and screen blinding of food salt, we conducted on-site material testing and process verification. Finally, we customized a Sanyuantang 1800mm SS316 rotary vibrating screen as the core screening equipment. The large screening area and food-grade corrosion-resistant structure perfectly match the customer’s continuous high-standard salt classification production needs.
Customer Screening Challenges & Requirements
The customer required a reliable food salt screening solution for continuous 3 TPH production, with precise particle classification at 1.4mm, 0.71mm, and 0.21mm grades. Considering salt’s corrosive property and moisture absorption characteristics, the new screening system needed food-grade SS316 material to avoid contamination, fully enclosed structure for dust control, and optimized screen layout to prevent material agglomeration and screen blinding. Additionally, the equipment had to support long-term stable operation and quick cleaning to meet food industry hygiene standards.
Our Solution
Aiming at the pain points of food salt screening, our engineering team abandoned small-capacity conventional screens and adopted the Sanyuantang 1800mm multi-deck SS316 rotary vibrating screen to build a dedicated 3TPH food salt screening system after repeated process simulation.
Capacity & Screening Area Optimization
We selected a 1800mm large-diameter screen to expand the effective screening area. Compared with small-size vibrating screens, this model can effectively reduce the material stacking thickness on the screen surface, make full contact between salt particles and screen holes, and ensure stable output of 3 tonnes per hour even under continuous feeding conditions.
Food-Grade SS316 Anti-Corrosion Configuration
All material contact parts of the equipment adopt SS316 stainless steel, which has stronger salt corrosion resistance than ordinary 304 stainless steel. It avoids rust contamination of food salt, reduces equipment wear, and greatly extends the service life of the food grade vibrating screen.
Multi-Deck One-Pass Classification
We configured three layers of screen meshes with 1.4mm, 0.71mm and 0.21mm specifications according to customer needs. The three-dimensional vibrating motion of the Sanyuantang rotary vibrating screen realizes automatic hierarchical screening of materials, and one device can complete four-grade particle separation, simplifying the production process and saving workshop space.
Fully Enclosed Dust-Proof & Easy-Clean Structure
The whole machine adopts a fully enclosed sealed design to effectively block fine salt dust leakage and improve the workshop production environment. The detachable screen frame and quick-lock structure support tool-free disassembly and cleaning, which meets the daily hygiene maintenance needs of food processing plants.
Detailed Equipment Configuration
| Item | Specification |
| Machine diameter | 1,800 mm |
| Screen design | Multi-deck rotary vibrating screen |
| Screen openings | 1.4 mm, 0.71 mm, 0.21 mm |
| Product contact material | SS316 stainless steel |
| Enclosure | Fully enclosed design for dust control |
| Discharge | Separate outlet for each particle fraction |
| Feed method | Continuous, controlled feeding |
| Design throughput | 3 TPH for food salt |
Details Show
Project Advantages
Stable 3TPH High-Efficiency Screening
The large-diameter screen surface ensures uniform material dispersion, avoids screen blinding caused by material accumulation, and maintains long-term stable high-efficiency screening, fully meeting the customer’s continuous production capacity requirements.
High-Precision Salt Classification
Relying on the three-dimensional rotary vibration principle of our salt classification screen, the material residence time is evenly controlled, realizing accurate separation of different particle sizes of food salt, and the finished product particle size fully meets industry standards.
Food Safety & Low Maintenance
SS316 food-grade material configuration eliminates hidden dangers of material corrosion and contamination. The sealed structure reduces dust loss, and the detachable design lowers daily cleaning and maintenance costs for enterprises.
Flexible Operation & Strong Adaptability
We can adjust the vibration amplitude and material running track through eccentric weights according to the actual moisture content and particle size distribution of on-site salt materials, ensuring stable screening efficiency under different production conditions.
Pre-Shipment Inspection & On-Site Guidance
Before delivery, we strictly implemented full-process quality inspection for the equipment, verifying screen material, mesh specification, screen tension and sealing performance one by one, and completed no-load operation tests to ensure stable vibration and no abnormal noise. After the equipment arrives at the site, we provided professional installation and commissioning guidance to standardize the feeding speed and equipment fixing method, helping customers quickly put the 3TPH food screening machine into formal production.
Project Operation Outcome
After official operation, the customized Sanyuantang food salt screening system runs stably for a long time. The equipment successfully realizes precise classification of 1.4mm, 0.71mm and 0.21mm food salt, with the actual operating throughput steadily reaching the designed 3TPH standard. The fully enclosed structure solves the dust pollution problem in the workshop, the SS316 material completely adapts to the corrosive production environment of salt, and the product qualification rate and production efficiency of the customer’s food salt processing line have been significantly improved.
