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Flash Dryers : INR   0 INR  0
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Flash Dryers :

Flash Dryers are characterized by short residence time of few seconds. Hence, great care needs to be taken in dispersion of the feed in the drying air, which is generally in the form of cake so that true surface water gets evaporated form the feed . Otherwise, the larger particles in the feed material may require longer drying time than the smaller ones in order to reach the desired moisture content. Flash dryers are used for drying a wide range of products. It can be used to dry both organic and inorganic chemicals. However, inherently there are few limitations in the flash drying concept and experts like us provide best solutions to this family of drying systems. Unique Features. Produces free flowing powders in agglomerated or granulated form. Produces powders having a very low content of small particles (dustless). Dries many thermoplastic and hygroscopic products that are problematic in other designs. Ideal for heat sensitive products as particle temperatures are kept low throughout the drying process. Drying is completed at low outlet drying temperatures, giving high energy utilization efficiencies. High drying efficiency and low energy costs. Direct drying with no initial diluting. Continuous processing with short drying time. Low operator overheads and minimum maintenance costs. Pressure shock-resistant chamber for safe drying of organic products. Available in GMP design. Application Agrochemicals. Ceramics. Food and feed products. Organic chemicals. Pharmaceuticals. Pigments and dyestuffs. Pigments and dyestuffs. Waste products. See More-

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Rotary Atomizer: INR   0 INR  0
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Rotary Atomizer:

A coating applicator is disclosed which includes a rotary atomizer on a driven shaft. The shaft operates at high speeds. Coating material is supplied to the rotary atomizer. A pair of spaced bearings rotatably mount the shaft and a seal assembly is positioned between the rotary atomizer and the front bearing. The seal assembly includes a bearing cover having a cutting edge. A mating cap member surrounds the shaft and has a sealing shoulder which is engaged by the cutting edge. Exhaust air is used to cool the bearings, pressure the interior of the applicator and enhance the seal assembly. The formation of sprays having the required droplet size distribution is vital to any successful spray dryer operation so that powder specifications can be met. Atomization is a high technology area where We has played a central role in the development and use of various nozzles and rotary atomizers in spray drying. We has mastered the manufacturing of atomizers for almost all products viz. dyestuff, dairy products, pharmaceuticals, food products, optical whiteners, ceramics, detergents, etc.. The choice of atomizer depends upon the properties of the feed and the dried product specification. In cases where more than one atomizer type is suitable, the rotary atomizer is generally preferred due to its greater flexibility and ease of operation and handling of high feed rates without need for atomizer identical arrangemnets handling of abrasive feeds, no blockage problems, low pressure feed system,ease of droplet size control through wheel speed adjustment,optimization of particle size of dried material

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Spray Dryer: INR   0 INR  0
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Spray Dryer:

Spray drying is a method of producing a dry powder from a liquid or slurry by rapidly drying with a hot gas. This is the preferred method of drying of many thermally-sensitive materials such as foods and pharmaceuticals. A consistent particle size distribution is a reason for spray drying some industrial products such as catalysts. Air is the heated drying medium; however, if the liquid is a flammable solvent such as ethanol or the product is oxygen-sensitive then nitrogen is used.[1] All spray dryers use some type of atomizer or spray nozzle to disperse the liquid or slurry into a controlled drop size spray. The most common of these are rotary disk and single-fluid high pressure swirl nozzles. Atomizer wheels are known to provide broader particle size distribution, but both methods allow for consistent distribution of particle size.[2] Alternatively, for some applications two-fluid or ultrasonic nozzles are used. Depending on the process needs, drop sizes from 10 to 500 µm can be achieved with the appropriate choices. The most common applications are in the 100 to 200 µm diameter range. The dry powder is often free-flowing. The most common type of spray dryers are called single effect. There is a single source of drying air at the top of the chamber (see n°4 on the diagram). In most cases the air is blown in the same direction as the sprayed liquid (co-current). A fine powder is produced, but it can have poor flow and produce a lot of dust. To overcome the dust and poor flow of the powder, a new generation of spray dryers called multiple effect spray dryers have been produced. Instead of drying the liquid in one stage, drying is done through two steps: the first at the top (as per single effect) and the second with an integrated static bed at the bottom of the chamber. The bed provides a humid environment which causes smaller particles to clump, producing more uniform particle sizes, usually within the range of 100 to 300 µm. These powders are free-flowing due to the larger particle size. The fine powders generated by the first stage drying can be recycled in continuous flow either at the top of the chamber (around the sprayed liquid) or at the bottom, inside the integrated fluidized bed. The drying of the powder can be finalized on an external vibrating fluidized bed. The hot drying gas can be passed in as a co-current, same direction as sprayed liquid atomizer, or counter-current, where the hot air flows against the flow from the atomizer. With co-current flow, particles spend less time in the system and the particle separator (typically a cyclone device). With counter-current flow, particles spend more time in the system and is usually paired with a fluidized bed system. Co-current flow generally allows the system to operate more efficiently.

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