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Dryer is widely used in food, feed, chemical, pharmaceutical, mining and other industries.
Before and after treatment
Rotary dryer is mainly used for building materials, metallurgy, chemical and other departments drying a certain humidity or particle size of the material. Dryer on the material adaptability, you can dry a variety of materials, and equipment is simple and reliable, it is widely used.
In the dryer, according to the material and hot gas flow direction is different, there are two kinds of downstream and counter current. In the choice of dryer running counter-current operation, should be based on the characteristics of the material, particle size, the final moisture requirements of the material and the layout of the workshop and other comprehensive consideration.
|Model (mm)||Tilt (%)||Speed (r / min)||Intake air temperature (℃)||Power (kw)||Capacity (t / h)||Weight (t)|
Rotary dryer structure: In order to increase the material evenly distributed in the drum section of the various parts of the drying medium with good contact, in the cylinder body Yang plate. Yang plate types are the following:
The lift type Yang plate: for large pieces of material or easy to bond in the cylinder wall of the material.
Four format Yang board: for large density, not brittle or difficult to disperse the material. The plate is divided into four cells, which are mutually different fan-shaped operating room, the material and hot gas contact surface than the lift-type Yang plate, and can increase the filling rate of materials and reduce the height of the material landing While reducing the loss of dust and other advantages.
Cross or frame Yang plate: for more brittle and easy to disperse the small pieces of material, so that the material can be evenly dispersed in the entire section of the cylinder.
The sleeve Yang plate: for the double heat transfer (or semi-diameter heating) drum dryer Yang board.
Sub-format (fan) Yang plate for fine particles and easy to cause powder flying material. The material is fed on the grid, and when the cylinder is rotated, the material is flipped and kept in contact with the hot gas, and the possibility of drying the material away from the dry material is reduced due to the reduction in the height of the material.
The above various forms of Yang plate can be distributed throughout the cylinder, in order to make the material can be quickly and more evenly sent to the Yang plate, but also in the feeding end 1 ~ 5m installed spiral guide plate to avoid wet material Bonding on the cylinder wall. At the same time because of the dry material is easily raised and was taken away from the exhaust, and in the discharge side 1 ~ 2m at no capacity to install any Yang plate.
Rotary dryer principle: dry wet material from the belt conveyor or bucket elevator to the hopper, and then by the hopper of the feeder through the feeding pipe into the feeding side. The inclination of the feed pipe is greater than the natural inclination of the material so that the material flows smoothly into the dryer.
The dryer cylinder is a rotating cylinder slightly inclined with the horizontal line. The material is fed from the higher end, the heating medium enters from the lower end, comes into contact with the material, and the heating medium and the material flow together into the cylinder. As the rotating material of the cylinder is operated by gravity to the bottom end. Wet material in the cylinder forward movement process, directly or indirectly get the heating body of the heat, so that the wet material to dry, and then in the discharge side by the belt conveyor or screw conveyor.
In the cylinder wall is equipped with copy board, its role is to copy the material and spread, so that the contact surface of the material and air flow increased to improve the drying rate and promote the material forward. Heating body is generally divided into hot air, flue gas and so on. After the heating body by the dryer, the cyclone dust is generally required to bring the gas within the material collected. If you want to further reduce the exhaust dust content, but also through the bag filter or wet dust collector and then put emissions.
Rotary dryer features
1, The use of new modular materials to make material without wind tunnel phenomenon, heat exchange efficiency.
2, A variety of weekly hairpin combination distribution, effective control of drying time, drying effect is good.
3, The device can choose a variety of forms copy board to adapt to different materials, simple structure, reliable operation, easy maintenance, production capacity.
4, Supporting coal (biomass) dual-use classifier, thermal efficiency than conventional heat of 15 to 20%, and flue gas clean, very little material contamination.
5, The use of a wide range, can be dry powder, granular, bar-like, paste, bad slag high-quality materials, flexible operation, the production of products to allow greater fluctuations in production, without affecting the quality of the product