Pellet wheat gluten has a few extra key production steps in the production process compared to vital wheat gluten, mainly focusing on the granulation and granule drying stages. The following are the specific additional production stages:
- Granularization
On top of gluten powder, gluten pellet production requires granulation of the wet gluten. This is one of the main differences from powder production.
- Gluten slurry preparation: mix the wet gluten with appropriate amount of water again to form a uniform gluten slurry.
- Pelletizing: the gluten slurry is made into granules by processes such as spray drying or extrusion pelletizing.
- Mixer: used to mix wet gluten with water to prepare uniform gluten slurry.
- Spray dryer: gluten slurry is sprayed through a spray head to form granules and dry in a high temperature air stream.
- Extruder: the gluten slurry is extruded into pellets by mechanical extrusion and then dried.
- Pellet drying
After granulation, wet pellets need to be dried to ensure uniform drying of the interior and surface of the pellets. This process is specific to gluten pellets.
- Drying: the wet gluten granules after granulation are subjected to drying treatment to ensure uniform drying of the internal and surface of the granules.
- Hot air dryer: drying through hot air circulation, temperature adjustable, suitable for large-scale continuous production.
- Drum Dryer: suitable for special drying needs, drying through heat conduction on the drum surface.
- Sieving and sorting
In order to ensure the homogeneity and consistency of gluten granules, additional sieving and sorting process is required, which is an extra step in granule production than powder production.
- Sieving: large and irregular particles are removed by sieving equipment to ensure uniformity of the granules.
- Sorting: the pellets are sorted according to size to ensure uniformity in each batch.
- Sieving machine: equipped with screens of different mesh sizes, sieving by vibration or rotation to ensure uniformity of size of particles.
- Classifier: used to classify particles by size to ensure consistent products.
To summarize, pellet wheat gluten has more of the following key production aspects compared to vital wheat gluten:
- Granulation: including gluten slurry preparation and granulation.
- Granule drying: drying of wet granules.
- Sieving and sorting: to ensure uniformity and consistency of the granules.
These extra steps make pellet wheat gluten different from vital wheat gluten in form and application, and can meet different market demands and application scenarios.
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