Fluidized Bed Cooler for Urea Granulation

Product Specifications

Technical details and manufacturing context for Fluidized Bed Cooler

Definition

The Fluidized Bed Cooler is a specialized component within a modular urea granulation and prilling system. Its primary function is to reduce the temperature of freshly formed urea granules efficiently, ensuring product quality by preventing agglomeration and maintaining uniform particle size distribution. The cooler operates on the principle of fluidization, where upward-flowing cooling air suspends the granules in a fluid-like state, maximizing surface area exposure for rapid heat transfer. This process is critical for safe storage and downstream handling, as it brings the granules from an inlet temperature of 90–120°C down to an outlet temperature of 40–60°C. The cooling capacity ranges from 5 to 50 t/h, matching the granulator output. The required cooling air flow rate varies between 10,000 and 50,000 m³/h, depending on capacity and temperature drop. Air inlet temperature should be between 10–35°C, and relative humidity between 30–70% to avoid condensation on the granules. The operating pressure is specified as 1.0–1.6 MPa, with a note that, and it references. The cooler handles granules sized 1–4 mm, typical for urea, and the moisture content after cooling is 0.5–1.5% to prevent caking. Construction materials include stainless steel 304/316 and carbon steel, with heat-resistant gaskets; the material of construction is specified as SS304/SS316L per ASTM A240. Power consumption, including fans and drives, ranges from 15 to 75 kW. The footprint varies from 6×2×3 to 12×3×4 meters (L×W×H), depending on capacity. All values are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. The cooler is designed for integration into a granulation system, with interfaces for granule inlet, air inlet, air exhaust, and cooled granule discharge. Maintenance signals include increased pressure drop across the bed, uneven cooling, or excessive vibration, indicating possible bed clogging or fan issues. Failure boundaries include operation outside specified temperature or pressure limits, which could lead to product degradation or mechanical damage.

Working Principle

Urea granules enter the fluidized bed where upward-flowing cooling air suspends them in a fluid-like state, maximizing surface area exposure for rapid heat transfer. The air absorbs heat from the granules and is exhausted, while the cooled granules are discharged for further processing or packaging. The process is controlled by adjusting air flow rate and temperature to achieve the desired outlet temperature and moisture content.

Common Materials

Stainless Steel 304/316, Carbon Steel, Heat-resistant Gaskets

Technical Parameters

Parameter	Typical range	Notes & selection driver
Cooling Capacity	5–50 t/h	Matches granulator output
Inlet Temperature	90–120 °C	Urea granules from granulator
Outlet Temperature	40–60 °C	Target for safe storage
Cooling Air Flow Rate	10000–50000 m³/h	Depends on capacity and temperature drop
Air Inlet Temperature	10–35 °C	Ambient or chilled air
Air Inlet Humidity	30–70 % RH	Avoid condensation on granules
Granule Size Range	1–4 mm	Typical urea granules
Granule Moisture Content	0.5–1.5 %	After cooling, for anti-caking
Material of Construction	SS304/SS316L	Corrosion resistance to ureaASTM A240
Power Consumption	15–75 kW	Includes fans and drives
Footprint (L×W×H)	6×2×3–12×3×4 m	Depends on capacity

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

Fluidization Chamber
Holds urea granules and facilitates fluidization with cooling air

Material: Stainless Steel
Air Distribution Plate Part
Evenly distributes cooling air across the bed for uniform fluidization

Material: Perforated Stainless Steel
Cooling Air Inlet Part
Entry point for ambient or chilled air into the fluidization chamber

Material: Carbon Steel with Insulation
Exhaust Vent Part
Removes heated air from the cooling process

Material: Stainless Steel
Discharge Mechanism
Controls the flow of cooled urea granules out of the chamber

Material: Stainless Steel with Wear-resistant Liners
Air Flow Control
Sets the fluidising air rate and temperature, which is how the outlet temperature is held.

Manufacturers of Fluidized Bed Cooler

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Frequently Asked Questions

What is the typical cooling capacity range?

The cooling capacity ranges from 5 to 50 t/h, matching the granulator output. The exact value depends on the specific model and application, so it must be confirmed with the manufacturer.

What are the inlet and outlet temperatures?

The inlet temperature of urea granules is typically 90–120°C, and the outlet temperature is 40–60°C. These values are reference ranges and should be verified for your process.

What materials are used in construction?

The cooler is typically made of stainless steel 304/316 or carbon steel, with heat-resistant gaskets. The material of construction is specified as SS304/SS316L per ASTM A240, but confirm with the supplier.

What are the operating pressure requirements?

The operating pressure is specified as 1.0–1.6 MPa, with a note that This is. Always verify the pressure rating for your specific model.

Data Basis

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

Preliminary Technical Classification

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pressure:	Operating: 0.1-0.5 bar(g), Max: 1.0 bar(g)
flow rate:	Granule throughput: 10-100 t/h
temperature:	Inlet: 90-110°C, Outlet: 40-60°C
slurry concentration:	Not applicable (handles solid granules)
fluidization velocity:	0.5-2.0 m/s

Fluidized Bed Cooler

Product Specifications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards