Rotary dryer (also known as rotary drum dryer, drum dryer, etc.) is a kind of contact internal heat transfer type drying machinery. In the drying process, heat is transferred from the inner wall of the drum to its outer wall, through the material attached to the outer wall of the drum to be dried. The moisture on the material evaporates is a continuous drying of production machinery.
The rotary dryers drum is a slightly angled and rotatable cylinder with wet material entering from one end up and dry material collecting from the other end down. Hot air enters at the inlet or outlet end and exits at the top of the other end. The barrel is equipped with a forward-running plate, which makes the material to be continuously run up and down in the process of turning the barrel, so that it can fully contact with the hot airflow to improve the drying efficiency and make the material move forward. The heat source of dry materials is generally hot air, high temperature flue gas, water vapor, etc.
The working process of the drum dryer is as follows: the material and liquid to be dried and processed will flow from the high level tank into the receiving tank of the drum dryer, the material will be thinly attached to the surface of the drum by the cloth film device, there is a heating medium inside the drum, most of the food industry uses steam, the pressure is generally 0.26MPa, the temperature is between 120150, the material will be vaporized by the heat transfer from the simple wall in the rotation of the drum, the drum will complete the process of cloth film, vaporization, dehydration, etc. in one rotation cycle, the dried material will be scraped down by the scraper, then conveyed to the finished product storage tank by spiral, and finally crushed or directly packed. The moisture evaporated in the heat transfer can, depending on its nature, be introduced into the corresponding treatment unit through a hood for dust capture or discharge.
The rotary dryer has a high capacity, low fuel consumption and low drying costs. The drum dryer is high temperature resistant and can use high temperature hot air to dry the material quickly. Scalable and rotary dryer design with production margins in mind, there is no need to replace equipment, even if production increases marginally.
The equipment adopts the spherical tractor structure, the tractor and the rollers cooperate well, which greatly reduces the wear and power consumption. The specially rotary dryer designed retaining wheel structure significantly reduces the horizontal thrust caused by the tilting of the equipment. Strong overload resistance, smooth operation and high reliability of the cylinder.
Since the dryer is heat transferring, the direction of heat transfer remains basically the same throughout the heat transfer cycle, so most of the heat supplied in the drum is used for the wet vaporization of the material with a thermal efficiency of 80% to 90%.
The heat and mass transfer process of the wet material film on the wall of the barrel, from inside to outside, the direction is the same, the temperature gradient is large, so that the surface of the material film maintains a high evaporation strength, generally up to 30 ~ 70 kg/(m.h).
Because the heating method is easy to control, the temperature inside the barrel and the heat transfer rate of the wall can remain relatively stable, so that the material film in the heat transfer state drying, product quality can be guaranteed. However, drum dryers also have their drawbacks, mainly the high surface humidity of the drum, which can damage the flavor or abnormal color of some products due to overheating. In addition, if a vacuum dryer is used, it is more costly and is only suitable for handling materials with very high thermal sensitivity.
Chemical, mining, metallurgical industries such as ore, slag, coal, metal powder, clay, diatomaceous earth, kaolin.Agriculture, fodder, fertilizer industry such as straw, forage, leaves, fishmeal, corn paste, starch residue, wine lees, medicine residue, fruit residue, soy sauce residue, bagasse, grass charcoal, organic compound fertilizer, sludge, water product waste, food factory waste, slaughterhouse waste, organic fertilizer, inorganic fertilizer, phosphate fertilizer ammonium sulfate.Dryers for powder and granular materials with special requirements. Such as various crystals, light calcium carbonate, active white clay, magnetic powder, graphite, inorganic mud, clay, lime slurry, ore slurry, phosphate slag, aluminum plant red mud.
Qingdao palet machinery co,.ltd is a professional manufacturer of biomass wood pellet mill, wood pellet plant, rotary dryer, activated carbon rotary klin,activated carbon machine, hammer mill, crusher, etc.
Economy Process Solutions Pvt Ltd, founded in 2014, has grown to a position of leadership among engineering companies. The Companys beliefs and values have been the corner stones on which it has built a durable and growing business. The company has spearheaded technological change in all the activities that it is engaged in today: fabrication, engineering, designing and marketing. We manufacture sophisticated ,state of the art systems . The range includes equipment designed and fabricated indigenously as well as in collaboration with some of the worlds leading manufacturing companies. We have been appointed engineers and contractors for major turnkey projects, not only in India but also overseas. The Company puts a premium on serving customers better. At the corporate level, we operate through various Products Groups, supported by a dedicated team of engineers in the field providing comprehensive pre-sales and post-sales service through a network of offices nationwide.
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In direct heat Rotary Dryers a continuous feed of wet particulate material is dried by contact with heated air, while being transported along the interior of a rotating cylinder / rotating shell acting as the conveying device and stirrer. SSP offers Rotary Dryers in co-current (Parallel) and counter-current operation. In the former the wet material is exposed to the hottest air which enables heat sensitive or sticky material to be dried successfully. In counter-current operation, dried material is exposed to the hottest air helping to achieve very low moisture content. The hot gas may enter at a very high temperature which varies from product to product with maximum temperature as high as 350C.
Steam tube dryer is one of the indirect heated rotary dryers, which contains rotating shell, rows of steam tubes arranged in concentric circles and extended throughout the length of the dryer. Steam tubes are designed to transfer heat from steam to the material being dried. This is one of the most energy efficient dryers. The tubes and radial fights together serve to agitate the material and to provide required residence time.
Industrial freeze dryer retains aroma, improves appearance and taste because freeze drying takes place at a low temperature which minimizes heat damage and retains volatile components (aroma). It also increases the shelf life of the dried product as compared to standard drying practices. Freeze-drying involves dehydration of food products at low temperature and pressure. As a result only the moisture is removed, leaving the molecular structure intact. The end product is light in weight with least or no change in volume. Worldwide freeze-drying technology is considered as the ultimate amongst all other dehydration methods. Hence this technique is currently being used for the production of instant coffee, instant tea, fruit pulp and other heat sensitive products.
It is best suited for continuous drying of temperature sensitive and sugar containing products at low temperature under vacuum conditions. The dryer consists of a vacuum chamber in which conveyer bands of food grade quality are arranged. The band passes over the hot plates heated internally by steam or hot water. Feed product is spread on the moving band and is dried as it moves on the hot plates. Dried product is obtained at the other end.
These types of dryers are mostly used in pharmaceutical companies. This is a batch type dryer heated by steam (Indirect). This dryer can also be used as a sterilizer. Recovery of solvent from powder is possible using such dryer.
Paddle Dryer is an indirect heat transmission dryer, a machine that processes organic and inorganic granular and powdery materials. It dries (or cools) such materials by bringing them into direct contact with revolving wedge-shaped hollow heaters (paddles) without using air as a heating medium.
The Process SSPs paddle dryer is designed to facilitate intimate mixing for optimized heat transfer. A screw feeder is used to feed the wet material into the system. Our process indirectly heats the wet mass with dry and saturated steam. The main hollow shaft holds the paddles in place. The steam enters the paddles and heats up its walls uniformly using a rotary joint which also works for condensate removal. As the wet mass moves forward in the system it releases vapor and dries up. The dried material is taken out from the dryer drum through the outlet. The vapors are removed from the dryer along with some fine particles to be collected in a cyclone separator. The hot air then passes through a wet scrubber to trap finer particles and flu gases from the dryer to release clean air. SSP can design and customize paddle dryer for use with a variety of heat sources, which has a vast number of applications:
Rotary dryers are used for drying wet powders and cakes, which are easily breakable and dispersible. The rotary dryer consists of a rotating drum with angle lifting blades which lift the feed as the drum rotates and showers it in the stream of hot air flowing through the drum. The rotary dryers can be used as calciners using direct or indirect firing. GMP plants are offered for pharmaceutical, food, and biochemical applications.
Description HG rotary scraper roller drying machine is a kind of rotating continuous drying equipment with internal heating conducting-style. Certain thickness of materials film attach to the drum from material liquid vessel under the drum. Heat is transferred to the internal wall of the cylinder through pipes and then to the external wall and to materials film, to evaporate the moisture in materials film so as to dry materials. Dried products are then scraped off by the blade fitted on the surface of the cylinder, fall down to the spiral conveyor under the paddle, and are conveyed, collected and packed.
The drying speed is high when the material liquid is atomized,the surface area of the material will increase greatly.In the hot-air flow,95%-98% of water can be evaporated at a moment.The time of completing the drying is only several seconds. This is especially suitable for drying the heat sensitive materials.
Raw material is fed into thefliud bed dryerfrom the inlet and moves forward continuously along with the level of fluidized-bed under the action of vibration.The hot air passes through fluidized-bed and carries out heat exchange with damp raw material.Then the damp qir is exhausted out through cyclone separator and duster the dry raw material is discharged through discharge outlet.
It is used inmedical intermediates, pesticide, chemical, pharmaceutical, food, feed etc. industry, such as powder granular materials drying and cooling.Drying- heat decomposition- combustion- cooling- reaction-sublimation
It is suitable for drying heat sensitive raw materials that can decompose and polymerize and metamorphose at high temperature .It is wide used in pharmaceutical ,chemical ,foodstuff electronic industries.
De-watering vegetable, particle feed gourmet powder, shredded coconut stuffing, organic color, compound rubber, acral fiber, medicine material, small wooden product, plastic product, aging and solidification for the electronic component and device.