Improving flow stability in small-scale spray dryers
The aim of this project is to improve the degree of flow stability in small-scale spray dryers.
Our work in assessing and controlling flow instabilities in large-scale dryers used in the dairy industry have shown that reducing these instabilities improves process yields due to lower deposition of particles on walls. However, small-scale spray dryers are used in pharmaceutical industries, and these smaller-scale dryers have laminar or transitional flows rather than the turbulent flows in larger-scale dryers. The two scales of dryer therefore have fundamentally different flow regimes, and the main scientific questions concern how, to what extent and why these different flow regimes affect the mechanisms, magnitudes and control measures in small-scale and large-scale dryers. Specifically, these main scientific questions include: (i) Assessing to what extent the magnitude and types of flow instabilities are different in small-scale and large-scale spray dryers; (ii) Determining how and why the mechanisms of the flow instabilities differ in the two dryer scales; and (iii) Identifying how the methods for reducing flow instabilities, such as changing the inlet levels of swirl and turbulence, might be implemented differently in the two scales of dryers.
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The opportunity ID for this research opportunity is: 611
Other opportunities with Professor Timothy Langrish
- Combined drying and crystallization in spray drying
- Competitive migration of proteins within droplets and particles during spray drying
- Super Sorbents from Spray Drying
- New robust spray dryer designs
- Energy flow models for timber kilns and total lifecycle costs of timber drying
- Developing new multifunction layered particles with novel modular food processing systems
- Improving the scale-up of spray drying for bioactive extracts and fibres
- The Effects of Spraying Materials into Gases Other than Air as a Way to Control Surface Coating by Proteins
- Creating and Testing Naturally-based Preservatives for Breads from Australian Herbs
- Improving the Storage Stability of Dairy Powders by Crystallizing Spray-Dried Powders in Fluidized Beds
- Differential Crystallization of Materials During Drying
- Wastes to Products: Towards New High-Value Products from Extraction and Spray Drying of Citrus Peels
- The Effects of Changing the Inlet Gas Temperature and Drying Atmosphere in Spray Drying on Particle Properties
- Vitamin C as a Means of Controlling Crystallinity in Dairy Products
- Energy Recovery in Spray Drying
- Comparing the Alignment of Capital Costs and Embodied Energy for Better Greenhouse Gas Accounting