Grinding Unit for Fertilizer Granule Production

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Solution Overview

Problem

Existing methods for producing fertilizer granules from phosphate-containing raw materials are either cost-intensive or prone to clogging due to inert raw material particles, which can lead to blockages in equipment and inefficient conversion processes.

Innovation Solution

A device with a grinding unit that comminutes phosphate-containing raw materials before granulation, increasing surface area and reaction participation, and includes a reactor recirculation system to optimize acid interaction and minimize clogging risks, using a combination of dry and wet grinding processes to adapt to different raw materials and reduce energy consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If phosphate-containing raw material particles are used directly in the suspension without grinding, then the process is simpler, but the particles are inert and tend to clog constrictions in devices such as nozzles

Engineering Contradiction:

Improveprocess simplicityVSAvoidclogging risk

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The raw material is ground into finer particles before being introduced into the reactor to form suspension. This preliminary size reduction prevents clogging of nozzles and constrictions during subsequent granulation processes while maintaining process simplicity through integrated grinding equipment

Inventive Principle:

Principle #10Preliminary action

2Productivity

If the raw material particles are ground to increase surface area and reaction participation, then reaction kinetics are accelerated, but the device complexity increases

Engineering Contradiction:

Improvereaction kineticsVSAvoidgrinding unit integration

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The grinding unit is merged with the reactor system, allowing raw material to be ground and simultaneously mixed with acid in the same apparatus. This integration achieves fine particle size for accelerated reaction kinetics while minimizing device complexity through combined functionality

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The reactor is designed to perform multiple functions: it serves as both the grinding chamber and the reaction vessel. The acid is introduced directly into the grinding zone, allowing simultaneous size reduction and chemical reaction in a single multi-functional unit

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If coarse phosphate-containing raw material is used, then the device complexity is reduced, but sedimentation and coarse sand proportion increase

Engineering Contradiction:

Improvegrinding equipmentVSAvoidsuspension uniformity

Core Design Contradiction:

Device complexityVSStability of the object's composition

Solution Approach 1:

Raw material is ground to fine particles before suspension formation, preventing sedimentation and ensuring uniform distribution throughout the liquid phase. This preliminary size reduction maintains suspension stability without requiring additional complex equipment

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3772504A1Device for manufacturing fertilizer granules

Publication Date: 2021.02.10 GLATT INGENIEURTECHNIK GMBH

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AI summary

The invention relates to a device (1) for the production of fertilizer granules comprising a reactor unit (3) having a raw material inlet (4, 23), an acid inlet (5) and a reactor outlet (6), and a reactor (8) for producing a suspension from the phosphate-containing raw material and the acid, and a granulator (9) for granulating the produced suspension, wherein the device (1) has a grinding unit (2) for the phosphate-containing raw material.