Rotary dryers BS 1.6.10 and BS 1.6.16
A rotary dryer is designed for bulk materials drying by furnace gases.
The rotary dryers are used in construction materials industries in various processing lines to dry limestone, to dry clay, to dry sand, to dry chalkstone, to dry pellets, to dry coal, and other bulky materials with particles lump size up to 60 mm.
The enterprise designs and manufactures drying complexes of various construction materials according to customer’s initial information.
A rotary dryer consists of a casing, support and thrust station, support station, drive, tyres, toothed gear. Drum casing is a welding structure made from separate sidewalls. Various types of heads are installed inside the casing for activization of heat transfer depending on a drum modification:
- at the very beginning - screw type, on the whole part of the drum – lifting blade type;
- at the very beginning - screw type, in the middle drum part - lifting blade and chain type;
- at the very beginning - screw type, in the middle drum part - lifting blade and sector type.
Application of various head types depends on the properties of the drying material (input and output moisture, fraction composition, flowability, etc.) and is chosen in each separate case together with the customer and manufacturer. Two steel tyres are the support of the casing. One tyre is beveled for thrust rollers which prevent longitudinal drum shift.
The casing is supported by its tyres on the support and thrust -support stations. Ring gear is fixed on the drum casing by means of cross-beams, through which the drum is rotating from the drive. The drive consists of a drive pinion, gear box and electric motor connected between each other by couplings and mounted on one frame.
The drum is installed towards the horizon at an angle 1-4o. Casing incline in combination with axial rotation provides the material shift towards the discharge chamber. Hot furnace gases enter the casing and touching the material heat it up evaporating the moisture it contains. Heat transmission occurs by three main methods: in weighed condition at material falling from the blades, from furnace gases through outer surface of the lying material in the material pile, from more heated parts of the drum inner device and a casing sidewall.
Drying modes for various materials are changing depending on raw material moisture on the drum input and the required moisture of finished material on the drum outlet, material fraction composition subject to drying, material characteristics. Temperature of the heat carrier supplied to the drum shall not exceed 800oC.
Flue-gas temperature at drum outlet is not less than 100 – 150oC to exclude possibility of moisture condensation in the drum discharge section. On furnace gas inlet of the drum there shall be vacuum not less than 30 Pa. Fuel – gas, black oil fuel, and light liquid oil.
“Strommashina” rotary dryers
“Strommashina” is an outstanding rotary dryers manufacturer (rotary cooler manufacturer). Our high standards, together with more than 50 years of drying units manufacturing, make us one of the top firing equipment manufacturers and specifically a rotary dryer manufacturer.
|Name||BS 1.6.10||BS 1.6.16|
|Type||Flow type||Flow type|
|Drum casing dimensions (length х diameter), mm||10000х1616||16000х1616|
|Drum volume, m3||20,1||32|
|Drum rotation frequency, rpm.||Up to 6,2||3,34/4,43/6,68|
|Heat carrier||Furnace gases||Furnace gases|
|Heat carrier temperature, оС||800||800|
|Overall dimensions (length х width х height), mm||10000х2000х2740||17000х2680х3740|
|Motor installed power, kW||18,5||14/15/21|
|Motor rotation speed, rpm||Up tp 1500||750/1000/1500|
|Supply voltage, V||380||380|
|Normative document||TU 4845-005-54028986-2008|
- Capacity is not indicated since it depends on material characteristics, its moisture (initial and final), initial material size. To be determined by calculation method.
- As agreed with the customer it is possible to change drum casing sizes.
- As agreed with the customer an additional completeness by loading and unloading chambers is possible, heat generators, burners.