Fondeur d'urée
Our urea melter prepares a consistent molten urea feed for fertilizer granulation. Controlled heating, short residence time and flow paths designed to avoid stagnant pockets work together to limit overheating and inhibit additional biuret formation, while maintaining reliable melt delivery to the granulator.
Uniform heating and responsive temperature control help prevent local overheating and inhibit additional biuret formation.
Flow paths and drainage are designed to avoid trapped melt, reducing prolonged heat exposure and deposit build-up.
Low molten inventory and coordinated feed and discharge keep urea moving toward granulation instead of holding it hot.
Description
Controlled Melting. Protected Product Quality.
In urea-based NPK granulation, melt quality starts before the spray nozzle. Excessive temperature and prolonged residence time promote additional biuret formation. A well-engineered urea melter balances complete melting with the lowest practical thermal exposure for the specified feed.
Ceylan designs the melting and transfer system around controlled heat input, uniform material movement and prompt discharge. Heating surfaces, circulation paths and vessel drainage are considered together to avoid stagnant pockets where urea can remain hot and form deposits.
The result is a process-focused solution for preparing and supplying molten urea to the granulation line. Capacity, operating temperature, materials and automation are selected for your raw material, available utilities and downstream requirements.
Principales caractéristiques et avantages :
- Temperature Control to Inhibit Biuret Formation:
Heat input is matched to the melting duty, with temperature monitoring and regulation to avoid unnecessary overheating. The operating window is selected for the actual urea composition and the downstream process, rather than a universal fixed temperature. - Flow Paths Without Stagnant Pockets:
Vessel geometry, heating-surface arrangement and discharge positioning are designed to keep material moving. Avoiding trapped melt reduces prolonged heat exposure and the conditions that encourage biuret-rich deposits. - Short, Controlled Residence Time:
Low molten inventory and coordinated solids feeding and melt withdrawal limit the time urea remains hot. The design considers reduced-load operation as well as the rated capacity. - Consistent Feed for Granulation:
Stable melt temperature and delivery support controlled spraying into the tambour de granulation. Transfer-line heating, insulation and filtration are specified to suit the melt and nozzle requirements.
Des détails de conception intelligents qui rapportent
- Heating Surface Matched to Duty:
Adequate heat-transfer area supports complete melting without relying on excessive heating-medium temperatures. Steam-side control and condensate drainage are engineered as part of the system where steam heating is selected. - Drainable Geometry and Accessible Internals:
Discharge paths and maintenance access are considered from the start, helping operators inspect and clean areas where deposits could otherwise accumulate. - Heated Melt Transfer:
Insulation and appropriately controlled heating on transfer piping, valves and strainers help prevent crystallization between the melter and the spray system. - Process Monitoring and Protective Controls:
Temperature, level and feed/discharge monitoring can be integrated with the plant control system. Alarm and shutdown functions are defined for the specific heating arrangement and operating risks. - Materials Selected for the Actual Feed:
Wetted materials are chosen for urea composition, contaminants, temperature and the approved cleaning method. Vent connections can be integrated with the plant vapor-handling system.
Caractéristiques
Melting Capacity
Sized to your required urea melting rate and feed conditions.
Residence Time
Less than 7 minutes
Project-specific value subject to design verification at full and reduced load.
Wetted Materials
Selected for feed composition, impurities, operating temperature and cleaning requirements.
Melt Temperature
134–137 °C
Indicative melt range; final setpoints depend on feed and process.
Operating Mode
Configured for the production schedule and stable melt demand of the granulation line.
Plant Integration
Feed handling, heated melt transfer and control interfaces matched to the plant.
Why Choose Our Urea Melter?
Reliable urea melting depends on more than heating power. Temperature, residence time and internal flow must work together to protect melt quality and support stable granulation.
Our design approach focuses on controlled thermal exposure, drainage without stagnant pockets and practical access for maintenance. The melter is considered together with solids feeding, melt transfer and the granulator interface, so performance is matched to the complete production line.
Share your required melting capacity, urea feed specification, available heating utilities and granulation process. We will define an appropriate equipment configuration and project-specific operating requirements.
Foire aux questions
How does temperature control help limit biuret formation?
Heating urea for too long or at unnecessarily high temperatures promotes additional biuret formation. Controlled heat input and temperature monitoring help keep the melt within its specified operating window. Uniform heating, short residence time and avoidance of stagnant pockets are equally important. This approach limits new formation; it does not remove biuret already present in the feed.
Why is avoiding stagnant pockets important?
A stagnant pocket holds molten urea away from the main flow. That material can remain hot much longer than the average residence time, encouraging biuret formation and deposits. Flow-oriented internals, effective circulation where required and drainable geometry help keep the melt moving and make cleaning more practical.
What operating temperature should a urea melter use?
There is no single temperature suitable for every installation. Pure urea melts at approximately 133 °C, while water and other constituents change the crystallization behavior. The operating window must allow complete melting and reliable transfer without unnecessary overheating. Final setpoints are established for the feed composition, heating arrangement and granulator requirements.
What information is needed to size a urea melter?
Specify the required urea melting rate, minimum operating load, incoming urea temperature, moisture and biuret content, available steam or other heating utilities, and the melt conditions required at the granulator. These inputs determine the heating duty, working inventory, materials and transfer arrangement. Any performance guarantee must be tied to agreed feed and operating conditions.