Design and Working Principle

The system is designed to operate in a "Cool and Dry" environment to prevent the sugar from melting or caramelizing.

• Feeding: S30 sugar is fed into the mill via a screw feeder mounted on the mill hopper — or via an externally controlled feed that feeds directly into the mill hopper. The feed arrangement provides a steady, metered input to the pulveriser.
• Grinding: The micro pulveriser reduces feed to the target fineness (95% < 250 micron). The grinding chamber is arranged vertically so material discharges downwards by gravity.
• Gravity discharge & buffering: Ground material falls into a discharge hopper located directly below the pulveriser. This hopper acts as a buffer to ensure even downstream discharge.
• Sealed discharge: A Rotary Air Lock (RAL) mounted below the discharge hopper provides an air -sealed, controlled discharge into collection drums/bins.
• Dust control / breathing: Air and entrained dust from the mill are drawn (or vented) through stainless ducting to the Vent Bag Filter. The C-Fan provides the required air movement for mill “breathing” and ensures dust is carried to the filter.
• Filtration & collection: The bag filter captures fine dust; filtered air is released (or recirculated as required). Filtered product in the filter hopper discharges into the RAL / collection drum as part of the product recovery path.
• Control & safety: The basic control scheme interlocks feeder, mill, fan and RAL to prevent overfeeding and to ensure the filter/fan is running during mill operation.

For Universal Mill Case

Step 1: Feeding Section

Sugar S30 is introduced into the Feed Hopper located at the upper level of the system.
A Rotary Air Lock (RAL) mounted directly below the hopper meters the sugar into the mill at a controlled rate.
This arrangement ensures smooth and choke-free feeding into the BT-450 mill.

Step 2: Grinding Section – Universal Mill BT-450

The metered sugar enters the BT-450 Universal Mill, where size reduction occurs through impact and milling action.
The mill is centrally positioned so that ground product falls vertically downward.

Step 3: Gravity Discharge & Product Buffering

Ground sugar drops by gravity into the Discharge Hopper placed directly below the BT-450.
The hopper stabilizes product flow and prevents surging during downstream discharge.

Step 4: Sealed Discharge to Collection

A second Rotary Air Lock (RAL) is located under the discharge hopper.
This RAL provides air-sealed discharge into a small collection drum or product handling bin.
This ensures clean, dust-free collection of finished sugar powder.

Step 5: Dust Collection & Mill Breathing

A Vent Filter is connected to the mill through ducting to handle air displacement (“breathing”) during grinding and discharge.
Dust-laden air from the mill is drawn into the vent filter for separation.

• The C-Fan provides the required suction.
• A Knife Gate Valve (KGV) is provided for isolation of the filter line during maintenance or cleaning.
• Separated fines fall into the dust collection drum below the filter.

This ensures a clean, dust-free plant environment and prevents sugar dust escape.

Model Description

RIECO offers scalable systems for various production needs:

Variant	Model	Capacity (Approx.)	Target Fineness
SU-2DH-SS304	2DH SS 304	250-300 Kg/hr	95% 150 Microns
SU-2DH-SS316	2DH SS 316	250-300 Kg/hr	95% 150 Microns
SU-2W-SS304	2W SS 304	500-600 Kg/hr	95% 250 Microns
SU-2W-SS316	2W SS 316	500-600 Kg/hr	95% 250 Microns
SU-BT-SS	UM 450 SS 304	1000-1200 Kg/hr	95% Pass 75 microns

*Capacities depend on feed sugar crystal size and moisture content.

Key Components

Component	Function	Technical Feature
Feed Hopper	Holds and regulates the incoming S30 sugar before entering the mill	Designed for steady gravity flow; food-grade SS construction; allows integration of controlled feeding devices
Screw Feeder / Feed RAL	Provides controlled, uniform feeding into the mill	Adjustable feed rate; avoids overloading; acts as air-seal when RAL is used
Micro Pulveriser / Universal Mill (BT-450)	Primary size reduction of S30 sugar to required mesh	Impact + milling action; low-heat grinding; suitable for 250 micron in Pulverizer & 75 Universal mill output; robust rotor/liner configuration
Gravity Discharge Hopper	Collects and buffers ground sugar directly below the mill	Vertically aligned design; prevents surging; smooth flow of fine powder
Product RAL (Below Discharge Hopper)	Ensures sealed, controlled discharge of final product	Prevents air leakage; maintains consistent product flow; supports dust-free operation
Vent Bag Filter	Handles mill breathing, separates air–dust mixture, and recovers sugar fines	Pulse-jet cleaning; high filtration efficiency; hygienic dust control; food-grade internal surface
Centrifugal Fan (C-Fan)	Creates suction for dust collection and airflow through vent filter	Maintains required negative pressure; stable airflow; ensures clean plant environment
Knife Gate Valve (KGV)	Isolates duct line during cleaning or maintenance	Quick shut-off; SS construction; prevents backflow of dust-laden air
Dust Collection Drum	Collects dust/fines separated from the vent filter	Compact design; easy handling; recovers fine sugar that would otherwise be lost
Ducting & Interconnections	Connects mill, hopper, C-Fan & vent filter	SS304/food grade material; smooth internal finish; leak-proof airflow paths
Control Panel / Local Control Box	Controls operation of feeder, mill, fan, and RALs	Basic interlocks; overload protection; feeder speed control; ensures safe & synchronized operation

Features & Benefits

• Anti-Caking Operation

The integration of dehumidified air prevents the sugar from absorbing moisture, ensuring a free-flowing final powder that doesn't lump in the bag.

• Explosion Safety

Fully compliant with ATEX / NFPA standards.12 Features include 10-bar shock-resistant construction (optional), chemical suppression systems, and mechanical isolation valves.

• Cool Grinding:

High airflow design keeps the temperature rise low (< 10°C), preserving the whiteness and quality of the sugar.

• Hygiene

SS304/316L construction with food-grade polishing and easy-clean designs (CIP capable) ensures compliance with FSSAI and FDA standards.

• Low Dust & Hygienic Operation

Vent bag filter with C-fan maintains dust-free environment, essential for food-grade applications.

Applications

• Bakery: 150–250 micron sugar for biscuits and cookies.
• Confectionery: "Icing Sugar" for dusting, cream fillings, and fondants.
• Beverages: Fine dissolving sugar for instant drink mixes.
• Pharma: High-purity sucrose powder for tablet coating and syrups.