Drying is the process of removing moisture or other volatile substances from solids, sludges and suspensions. Various types of dryers are used for this process. Since heat can be transferred in several ways, there are five types of dryers – convection, diaphragm, radiant, dielectric and microwave and special. One of the types of convection dryers is the spray dryer and fluidized bed dryer produced by our company.
1) Spray dryer:
Spray drying is a method of dehydrating raw materials while atomizing the substance fed to the drying chamber. The process is carried out in a strictly set temperature regime. The final product is dehydrated dry material in several possible forms – dusty powders, microcapsules, granules – depending on the prepared initial mixture and process conditions. Raw materials subjected to spray drying are dispersions, emulsions, solutions, pastes, other non-Newtonian fluids, which may form the desired product under appropriate conditions.
Typical spray drying applications generate products such as:
2) Fluid bed dryer:
Fluid bed drying consists of feeding a stream of hot gas into the drying chamber, where bulk substances are located.A fluidised bed is formed – a dynamic suspension, where the solid particles in the gas stream move upwards from below. A fluidised bed is formed, i.e. a dynamic suspension, where the solid particles in the gas stream move from bottom to top. Fluidization is characterized by a developed interfacial surface and mixing of the fluid through the movement of solid particles, which intensifies the drying process. The fluidized bed dryer is a universal device for thermal drying, agglomeration, coating and microencapsulation processes.
A solid material subjected to the drying process in a hot air atmosphere with simultaneous fluidised movement gives up water evenly from its surface, causing the separation of the agglomerated material by collision of the particles.
The solid material put into the fluidised state can be wetted by spraying nozzles with a binder, causing its agglomeration and thus increasing the diameter of the product to a target size.
To obtain an even protective coating, e.g. against product aging, glossy coating, others, by dosing the coating emulsion in the fluidised state and the set temperature regime, we obtain an even distribution of the coating material in each granule.
Active components introduced into the coating solution are successfully dosed onto the granule core material, under appropriate process conditions we obtain equal concentration of active materials inside the granules.
It is worth adding that the efficiency of the dryer is best determined by the amount of evaporated water per unit of time. This allows for universal design of the device, without breaking the secret of the recipe. Spray dryers and fluidized bed dryers are used in many branches of industry, including food, pharmaceutical and biotechnological industries.
Do you have any doubts whether the dryer can handle your application? Check its capabilities. Contact us and rent it for testing! Our engineers will answer all your questions.
Download the survey
Below is a downloadable questionnaire to help you choose the right solution:
Pro-mill’s liquid phase bioreactor is a compact system built on a SKID frame designed to carry out biotechnology processes on liquid substrates on a scale from laboratory to industrial.
A homogenizer-type mixer is used to carry out the homogenization process consisting of combining two unmixed components into a stable, homogeneous mixture.
The selection of an appropriate mixing system depends on the properties of the substance and the process conditions under which the device is to operate.
The CIP (Clean In Place) washing station is used to clean equipment, production lines and industrial pipelines in closed circuit.
There are five types of these devices – convection, membrane, radiant, dielectric and microwave and special. One of the types of convection dryers is spray dryer and fluidized bed dryer produced by our company.
Pro-mill’s solid phase bioreactor is used to carry out biotech processes on solid substrate. The installation is mounted on a SKID frame and has all the necessary equipment for the process.
Chemical reactors are devices used to carry out a given process with respect to relevant process parameters, e.g. temperature, pressure.
Mixers for solid products are widely used e.g. in food, cosmetic and agricultural industries.
Specialist installations, which are created with a specific client application in mind. Each of them is different and responds to an existing industrial problem. There are also pilot installations within the scope of these installations.
Disk filters are a new, innovative filtration method, based on the use of ceramic discs with an accuracy of 2um to even 5nm.