Sugar is a critical raw material in the food processing, chemical, and pharmaceutical industries, and its screening process directly impacts subsequent production uniformity and product quality. During large-scale production, sugar is prone to agglomeration due to temperature and humidity fluctuations during storage and transportation. Traditional screening equipment suffers from incomplete agglomeration, low efficiency, and the generation of sugar dust.
The Durable Trommel Screen, with its integrated "dynamic screening + gentle crushing" design, has become a key solution to addressing the pain points of large-scale sugar screening. It is widely used in the raw material pretreatment stages of sugar refineries and food processing plants.
Coreal Machinery has compiled some information for your reference.
I. Working Principle of the Durable Trommel Screen
The Durable Trommel Screen consists of a slightly tilted, uniformly rotating cylindrical or hexagonal screen drum. Material enters through the high-end feed port and is lifted and tumbled within the drum as it rotates, moving axially toward the lower end under its own gravity.
During this process:
Screening: Particles smaller than the sieve openings pass through the sieve openings and become the undersize material.
Conveying and discharge: Particles larger than the sieve openings continue to move forward and are eventually discharged from the lower outlet, becoming the oversize material.
II. The Core Pain Points of Large-Scale Sugar Screening: Why Do We Need a Durable Trommel Screen?
1. The Difficulty of Agglomeration: Sugar agglomerates vary greatly in hardness. Vibrating screens rely on high-frequency vibrations to break them up, which can easily lead to two problems: soft agglomerates clumping together and becoming difficult to break up, while hard agglomerates are crushed into fine powder, affecting screening accuracy and causing raw material loss.
2. Mismatch between Efficiency and Capacity: Traditional vibrating screens typically have a processing capacity of 1-5 tons/hour per unit. Large-scale production requires multiple units connected in parallel, which not only takes up space in the workshop but also requires an additional material distribution system, complicating the process and increasing energy consumption.
3. Quality and Safety Hazards: The high-frequency vibration of a vibrating screen easily causes friction between sugar granules, generating large amounts of powdered sugar dust. This pollutes the workshop environment and, after absorbing moisture, causes the sugar granules to agglomerate again, creating a vicious cycle of "screening-re-agglomeration." Furthermore, vibration and impact can damage the surface of sugar granules, affecting dissolution rate and uniformity during subsequent processing.
4. Poor Screening Uniformity: Vibrating screens use a linear or circular trajectories, resulting in a short dwell time on the screen surface. This can easily lead to "incomplete screening," where unbroken agglomerates are mixed into qualified granules, necessitating secondary screening and further reducing production efficiency.
III. How the Durable Trommel Screen Targetedly Solve Sugar Screening Challenges
1. Solving the "Agglomeration Breaking" Problem
- Low Speed and Gravity Drive: The Durable Trommel Screen operates at a very low speed. Instead of relying on vigorous vibration, the material is screened and conveyed by gravity and rolling. This slow tumbling motion minimizes impact and shear forces on the sugar granules.
- Natural Deagglomeration: Agglomerated sugar is continuously lifted, tumbled, and dropped within the drum. This gentle tumbling process itself effectively loosens and deagglomerates the sugar. Gentle friction and collisions between clumps and between clumps and the screen wall are sufficient to naturally break up most medium-sized clumps, rather than forcibly breaking them up. This maximizes the preservation of the original sugar crystal size and avoids the production of excessive fines.
2. Addressing "Efficiency" Issues
- Continuous Operation and High-Throughput: The Durable Trommel Screen features continuous feeding and discharging, with material screening occurring as it moves within the drum. It is suitable for large-scale continuous production lines, processing tens to hundreds of tons of sugar per hour.
- Effective Anti-Clogging: The rotating screen drum continuously tumbles the material, creating a self-cleaning effect on the screen. Sugar particles are less likely to be pressed into or stuck in the screen holes, significantly reducing the risk of screen clogging, ensuring stable screening efficiency, and reducing downtime for cleaning.
- Strong Grading Capacity: The Durable Trommel Screen can be designed with multiple sections and equipped with screens of varying apertures, enabling multi-stage grading in one operation, streamlining the process and improving overall efficiency.
3. Other Advantages
- Low Dust: The relatively closed screening environment and gentle handling effectively control sugar dusting, reducing material loss and improving the working environment.
- Low Noise and Low Maintenance: The simple structure, few moving parts, and smooth operation are significantly quieter than vibrating screens, resulting in lower maintenance costs.
- High Durability: The screen drum is mostly made of wear-resistant stainless steel, which can withstand long-term wear and corrosion from sugar.
Coreal Machinery is committed to providing you with high-quality screening equipment and industry solutions.