Gat No. 171, Plot No. 11, DhanoreVillage, Alandi-Markal Rd. Tal. Khed, Dist. Pune 412105, Maharashtra, India.
Call us now +91 9822681526
Email now swamiraj.engineering@gmail.com
|Contact Us
Call us now +91 9822681526
Email now swamiraj.engineering@gmail.com
Address Gat No. 171, Plot No. 11, DhanoreVillage, Alandi-Markal Rd. Tal. Khed, Dist. Pune 412105, Maharashtra, Indi
Belt Drying System for Pigments
Belt Drying System for Pigments
Systems

Belt Drying System for Pigments

Swamiraj Engineering offers advanced and economical belt drying machines to meet the demands for continuous dryers for the chemical industry. We are a Qualitative band dryer manufacturer located in Pune, Maharashtra specialising in Continuous Belt/Tray Dryers for Industrial purpose. Our Single/Multi Stage Continuous dryers are designed as per the requirements of our clients with varying widths from 1000 mm to 2500 mm and 12Mtrs to 30 Mtrs in length. For heating steam is used as medium. Dryers are made in Stainless Steel Grade 304 for contact Parts. Outside body & Non-Contact Parts are MS Powder coated

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Application

For Drying Pigment Filter press cake in Noodle form.

A belt dryer is an industrial drying system that operates by passing a continuous Belt or band of material over a heated surface, making it efficient for drying applications such as pigment drying. The working principle of a band dryer for pigment drying involves several key steps:

  • Material Feeding: The wet pigment noodles are uniformly spread onto a moving conveyor belt or band. This ensures a consistent layer of material for effective drying.
  • Heat Transfer: As the belt moves forward, it passes over a heated belt. Heat is transferred from these surfaces to the pigment, causing moisture to evaporate.
  • Evaporation: The heat causes the moisture present in the pigment noodles to evaporate. This process requires careful control to avoid overheating, which can damage the pigments or alter their properties.
  • Airflow: Belt dryers use an airflow system to remove the evaporated moisture from the drying zone. This airflow can be controlled to optimize drying efficiency and prevent condensation on the dryer surfaces.
  • Cooling Zone: After the drying process, the dried pigment may pass through a cooling zone to bring its temperature down before it’s collected or packaged, ensuring that any moisture generated during cooling does not re-absorb into the product.
  • Collection: The dried pigment noodles are then collected at the end of the conveyor.
  • The dried noodles are then fed into the Hammer mill.
  • The final product is typically in a powdered form, ready for further processing or packaging.

Key Considerations

Successful drying of pigment noodles requires careful control of process parameters and a dryer designed to preserve pigment quality.

  • Temperature Control: Maintain appropriate temperatures in each drying zone to avoid thermal degradation or color changes of pigments. Use zoned heating with independent controls for best results.
  • Moisture Content: Continuously monitor moisture (in-line sensors or offline sampling) to ensure the product reaches the target dryness without over-drying.
  • Pigment Properties: Different pigments behave differently (particle size, heat sensitivity, hygroscopicity). Characterize feed material and adapt residence time, temperature profile and air flow accordingly.
  • Airflow & Exhaust: Design ducting and exhaust to remove humid air and avoid recirculation into the drying zones, which can lengthen drying times and increase risk of contamination.
  • Product Handling: Ensure gentleness in transfer points, and include a cooling zone so the dried noodles can be packed immediately without additional handling.
  • Uniformity: Use transfer/mixing features, appropriate belt speed profiles and multiple fans/steam coils to ensure gradual and even drying across the belt width and along the machine length.

The Feed Side

The wet material that is noodles are fed on the feed side of the equipment and is evenly spread across the entire width of the Continuous Belt conveyor.

The Conveyor Drive

The conveyor consists of stainless steel trays connected with each other forming a micro hinge with a wire mesh belt passing through it. The trays are fitted with stiffeners to prevent buckling and are fitted to steel chains on both sides of the machine. The chains are driven through sprockets and are equipped with a VFD drive to control the speed of the conveyor as per user requirement.

Delivery Section

The dried noodles are discharged from the Delivery End of the dryer for further processing, grinding, or the hammer mill section.

Different Zones, Steam Coils and Air Recirculation – Different Heating Temperatures

The machine is divided into different zones along the length of the dryer. Each zone comprises a different set of steam coils with its individual circulating fans. This allows the user to set different temperatures in each zone along the length of the dryer by gradually increasing or decreasing the set temperatures as the product travels. A PID controller can set the desired temperature within a ±1 °C thereby eliminating variations in temperature.

The circulating fans collect hot air from the steam radiator and circulate hot air towards the particle side of the drying chamber. The hot air passes through the product, thereby drying it. The humid air is exhausted with the help of ducts and exhaust fans and is removed from the dryer.

Control Panel, Automation and Instrumentation

The Control Panel comprises Temperature Indicators, HMI, VFD Drive for the conveyor drives, Humidity Indicators (optional), and Chart Recorders (optional) as well as the controls for each part of the dryer.