Design and material selection of granulation equipment
The design and material selection of granulation equipment are the key to ensuring equipment performance and product quality. A granulation equipment with reasonable design and appropriate material selection can effectively improve production efficiency, reduce energy consumption, and ensure stable product quality.
1. Design of granulation equipment
The design of granulation equipment mainly considers the following aspects:
Material characteristics: The physical properties (such as particle size, humidity, viscosity, etc.) and chemical properties (such as corrosiveness, reactivity, etc.) of different materials have a direct impact on the design of the equipment. For example, for high-humidity materials, it is necessary to consider drying devices; for corrosive materials, it is necessary to select corrosion-resistant materials.
Process requirements: Different granulation processes have different requirements for equipment. For example, wet granulation and dry granulation have different requirements for the structure and function of the equipment.
Production scale: The size of the production scale determines the processing capacity and degree of automation of the equipment.
Environmental requirements: Factors such as temperature, humidity, and dust concentration in the production environment will affect the design of the equipment.
Common types of granulation equipment and design features:
Turntable granulator: simple structure, easy operation, suitable for small and medium-sized production.
Extrusion granulator: high pressure, good material forming effect, suitable for granulation of high-density materials.
Fluidized bed granulator: uniform particle size distribution, suitable for coating and modification of granular materials.
Spray drying granulator: suitable for granulation of liquid materials, narrow product particle size distribution.
The following points should be noted when designing granulation equipment:
Sealing: In order to prevent material leakage and dust pollution, all joints of the equipment should have good sealing.
Abrasion resistance: During the granulation process, friction will occur between the material and the equipment components, so the wear resistance of the equipment is very important.
Easy to clean: The structure of the equipment should be easy to disassemble and clean to reduce material residue and cross contamination.
Safety: The design of the equipment should meet the requirements of safe production and set up necessary protective devices.
2. Material selection of granulation equipment
The selection of granulation equipment mainly considers the following factors:
Material properties: Select appropriate materials according to the corrosiveness, abrasiveness and other characteristics of the material.
Working environment: Choose corrosion-resistant and high-temperature resistant materials according to the temperature, humidity and other conditions of the working environment.
Equipment stress: Choose appropriate materials according to the size and direction of the force on different parts of the equipment.
Cost: Choose cost-effective materials on the premise of meeting performance requirements.
Commonly used granulation equipment materials:
Stainless steel: Good corrosion resistance, widely used in food, medicine and other industries.
Carbon steel: High strength, low price, suitable for non-corrosive environment.
Alloy steel: Good wear resistance, suitable for high wear conditions.
Heat-resistant alloy: High temperature resistance, suitable for high temperature environment.
Non-metallic materials: Such as ceramics, plastics, etc., have the characteristics of corrosion resistance and wear resistance.
The following points should be noted when selecting materials:
Material compatibility: Different materials should have good compatibility to avoid electrochemical corrosion.
Material processing performance: The processing performance of the material will affect the manufacturing difficulty and cost of the equipment.
Material life: Choose materials with long life and low maintenance cost.
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