Overview

The 2L spray dryer is a device that transforms solutions, emulsions, or suspensions into fine droplets through a spray system, which then undergo heat exchange with a stream of hot air, causing rapid evaporation of moisture to yield a dried product.

Principle

u Atomization Process: The material is transported to the atomizer via a feed pump. The atomizer disperses the material into tiny droplets using mechanical centrifugal force, pressure, or airflow. The size of these droplets typically ranges from tens to hundreds of micrometers.

u Drying Process: The atomized droplets come into full contact with hot air entering from the top or sides of the drying chamber. Due to the large specific surface area of the droplets, moisture evaporates almost instantly, and the solutes or solid particles within the droplets gradually form dry powder or granules. These are then carried by the hot air flow and eventually expelled from the bottom of the drying chamber.

Advantage

l Fast Drying Speed: The material is atomized into fine droplets, providing a large surface area that allows for full contact with hot air. This enables the drying process to be completed in a short time, typically within seconds to tens of seconds, which helps preserve the quality of the material.

l High-Quality Products: The resulting product is in the form of powder or granules with uniform particle size, good flowability, and excellent solubility. Additionally, the surface temperature of the droplets remains relatively low during drying, minimizing the risk of overheating and degradation. This helps retain the nutritional content, aroma, and color of the material.

l Simple Operation: The equipment features a high level of automation. By controlling parameters such as feed rate, inlet air temperature, and outlet air temperature, the drying process can be precisely managed, ensuring stable production operations with minimal labor intensity for workers.

l Strong Adaptability: It can handle a variety of materials with different properties, including solutions, emulsions, and suspensions. By adjusting the parameters of the spray dryer, a wide range of materials can be effectively dried, making it highly versatile.

l Hygienic and Environmentally Friendly: The drying process takes place in a closed drying chamber, preventing contact between the material and the external environment and reducing the risk of contamination. This meets the hygiene requirements of industries such as food and pharmaceuticals. Moreover, the exhaust gases generated during drying are treated and purified before being released, minimizing environmental pollution.

l Compact Design: The equipment has a compact structure and relatively small size. The 2L model is suitable for laboratory or small-scale production settings, allowing drying tasks to be completed in limited spaces and saving on space costs.

Applications

v Food Industry: Used in the production of milk powder, coffee powder, instant tea powder, seasonings, and spices. For example, in milk powder production, milk is sterilized, concentrated, and then dried into powder using a spray dryer, preserving its nutritional content and making it easy to store and transport.

v Pharmaceutical Industry: Utilized for preparing drug intermediates, active pharmaceutical ingredients (APIs), and traditional Chinese medicine extracts. For instance, drug solutions are spray-dried into powders, facilitating further processing into tablets, capsules, and other dosage forms, while also enhancing drug stability and solubility.

v Chemical Industry: Employed for drying various chemical raw materials, pigments, dyes, and catalysts. For example, titanium dioxide slurry is spray-dried into titanium dioxide powder, which exhibits excellent dispersibility and whiteness.

v Other Fields: In the ceramic industry, ceramic slurry can be spray-dried into ceramic powder for the production of ceramic products. In the electronics industry, it is used for preparing powders of electronic materials.

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