Product Screening System for Urea Granulation

Product Specifications

Technical details and manufacturing context for Product Screening System

Definition

The Product Screening System is a critical component of the Modular Urea Granulation and Prilling System, responsible for classifying the produced urea granules into specified size fractions. It ensures that only granules meeting the target size distribution proceed to packaging or further processing, while oversized and undersized particles are recycled or removed, maintaining product quality and process efficiency. The system typically employs vibrating screens or rotary sieves. Urea granules from the granulator or prilling tower are fed onto the screen surface. Mechanical vibration or rotation causes the granules to move across the screen. Particles smaller than the screen apertures pass through (undersize), while those larger than the apertures are retained (oversize). Correctly sized granules are collected as the on-spec product stream. The system is available in various configurations to match specific capacity and footprint requirements. Key parameters include processing capacity (10–100 t/h), separation accuracy (±0.5 mm), screen mesh size range (0.5–10 mm, ISO 3310-1), vibration frequency (15–25 Hz), motor power (5.5–22 kW, IEC 60034), supply voltage (380–690 V AC, IEC 60038), operating temperature (-20–60 °C), ingress protection (IP54–IP65, IEC 60529), material of contact parts (SS304–SS316L, ASTM A240), machine weight (1500–8000 kg), and footprint (3000×1500×2000 to 6000×3000×3500 mm). Materials on file include stainless steel (e.g., 304, 316), polyurethane screen mesh, and carbon steel for structural frames. These values are reference ranges and must be verified with the legal manufacturer for the specific model and application. The system is designed for integration into urea production lines, with interfaces for feed, product discharge, and oversize/undersize recirculation. Verification questions should address actual process conditions, required capacity, and material compatibility. Maintenance signals include screen wear, reduced separation efficiency, and abnormal vibration. Failure boundaries include screen breakage, motor overload, and structural fatigue.

Working Principle

The system uses vibrating screens or rotary sieves. Granules are fed onto the screen surface, and mechanical vibration or rotation moves them across. Particles smaller than the apertures pass through as undersize, while larger ones are retained as oversize. Correctly sized granules are collected as the on-spec product stream. The separation accuracy depends on screen mesh size and vibration parameters.

Common Materials

Stainless Steel (e.g., 304, 316), Polyurethane Screen Mesh, Carbon Steel (for structural frames)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Processing Capacity	10–100 t/h	Depends on granulator output and screen area
Separation Accuracy	±0.5 mm	Ensures product size distribution within spec
Screen Mesh Size Range	0.5–10 mm	Customizable to product requirementsISO 3310-1
Vibration Frequency	15–25 Hz	Adjustable for optimal screening efficiency
Motor Power	5.5–22 kW	Depends on machine size and capacityIEC 60034
Supply Voltage	380–690 V AC	Three-phase; other voltages on requestIEC 60038
Operating Temperature	-20–60 °C	For ambient and product temperature
Ingress Protection	IP54–IP65	Dust-tight and protected against water jetsIEC 60529
Material of Contact Parts	SS304–SS316L	Corrosion-resistant for ureaASTM A240
Machine Weight	1500–8000 kg	Depends on model and configuration
Footprint (L×W×H)	3000×1500×2000–6000×3000×3500 mm	Varies with capacity and number of decks

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Vibrating Screen Deck
The primary screening surface where size separation occurs via vibration.

Material: Stainless steel frame with polyurethane or wire mesh panels
Vibration Motor/Exciter
Generates the oscillating or gyratory motion necessary for material movement and separation on the screen deck.

Material: Cast iron housing, copper windings
Feed Hopper/Chute Part
Channels the incoming stream of urea granules evenly onto the screen surface.

Material: Stainless steel
Product Collection Hoppers
Collects the separated streams: on-spec product, oversize, and undersize.

Material: Stainless steel
Dust Enclosure/Seals Part
Contains dust and prevents product loss or contamination during the screening process.

Material: Rubber, polyurethane, or fabric

Manufacturers of Product Screening System

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Frequently Asked Questions

What is the typical processing capacity of this screening system?

The processing capacity is listed as 10–100 t/h, depending on granulator output and screen area. The actual capacity for a specific model must be confirmed with the manufacturer.

What materials are used for the contact parts?

Contact parts are typically made of stainless steel (e.g., 304, 316) or polyurethane screen mesh. The material of contact parts is specified as SS304–SS316L, but the exact grade should be verified with the supplier.

What is the separation accuracy?

The separation accuracy is ±0.5 mm, ensuring product size distribution within spec. This value is a reference and may vary with the actual model and operating conditions.

What standards are referenced for the screen mesh?

The screen mesh size range is 0.5–10 mm, and the standard referenced is ISO 3310-1. This standard is for test sieves and should be used as a procurement reference, not as proof of compliance.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Atmospheric to 0.5 bar gauge
flow rate:	5-50 m³/h per screening unit
temperature:	Ambient to 80°C (176°F)
slurry concentration:	Up to 70% solids by weight

Product Screening System

Product Specifications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards