What is the drying of the spray?
Spray drying is a process in which the solid material is produced by leaping of liquids or sludge, a mixture of solids and liquids, from nozzles to heated air streams. It is used to produce a wide range of powder and solid chemicals, from fertilizers to powder pharmacy. Creating solids from liquids or mixtures reduces transport costs, improves storage life and provides the possibility to create different shaped particles for specific applications. The spray drying technology was first developed at the end of the 19th century, but could not be seen commercially until the 1920s, when the improvement allowed continuous operation. The products can be sprayed at the top of the open storage tanks or baskets and the liquid evaporates before the product reaches the bottom. Avoid air can be introduced at the top along with a product called the flow of common current, because the air and the product move in the same terrible event. The flow of upstream occurs when the product flows and the air moves from below to the topreservoirs.
Mixed flow system can be used for different materials and patterns of drying. The nozzle usually shows and creates the formula upwards. The air is introduced at the bottom of the tank. The particles first move up in the air stream, then fall down upstream, causing a mixed flow. These spray drying systems can be useful for larger particle sizes or materials that require the next drying time.
products made from spray drying systems are usually round balls, but other shapes can be performed. The aspect ratio or maximum length ratio to the width of the product is usually used to measure non -depth shapes. A material that is spherical, but in the middle to reduce weight, can be created. You can use a two -stage system where the first step creates a product that is still slightly wet, and the material is held together in the second step to create larger particles called aggregates.
The nozzle can be changed for different products or particle sizes. Atomizers, stationary and rotary, are used to create balls. Rotary atomizers use a spinning nozzle to eject the material in fine droplets. The two -pool nozzles can use a mixture of product and compressed air or steam to create a spray pattern. The use of compressed air or steam adds the cost of the product, but may be needed for materials that are very strong or require it to be of steam fluids.
drying of freezing can be used to dry products by spraying liquids into chilled storage tanks. The liquids are removed by frost and sublimation or changes directly from the solid to the gas without melting. This technique can be useful for creating driven drugs or other chemicals that are sensitive to heat.