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Difference between revisions of "Vertical Dryers"
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[[File:Vertical.jpg|thumb|200px|right|Vertical Dryer]] | |||
The '''Vertical Dryers''' adopt vertical equipment and steel structure housing, and the lining is equipped with heat preservation material to keep warm. In the inner of the kiln, and multilayer high temperature castings have been used and overlapped. In the higher, middle and lower parts, all relevant components have several groups of vibrate, closure, temperature control and intelligent control systems. Water vapor and smoke collected and removed by the whirlwind dust collector installed in the draught fan. | |||
With this dryer the coating can be hardened onto the sleeve. Several sleeves with a max. length of 1.800 mm can be dried in a vertical position. Hot-air circulation, adjustable amount of fresh air, safety provisions and a controller for the maximum temperature are built in. | |||
==='''Advantage'''=== | |||
* Drying temperatures from –20° to 350°C | |||
* Heat distribution media: steam, thermal oil, water | |||
* Coolant: Brine solution or water | |||
* Temperature transfer by means of cylinder jacket, half-pipe, shaft and helix | |||
* Materials: high-carbon steels to high-quality stainless steels, e.g. Hastelloy | |||
* Pressure in products and in heating chamber: -1 to +40 bar | |||
* GMP and CIP variants, conforming to FDA | |||
* Especially gentle homogenisation by means of double-thread mixing helix. | |||
* Low rotational speeds in comparison to other systems | |||
* Large heating surface and shortened drying times by design | |||
* Large operational volume spectrum and optimal residual emptying | |||
* Very good evaporation performance | |||
* Evaporation processes almost continuously controllable | |||
Special pharmaceutical designs available | |||
==='''Special Pros'''=== | |||
1.'''Innovative design:''' with new-style vertical of drying,the material is free dropping gas material counter current operation,which is integrated gathering heat conduction and thermal radiation into a body .Heat efficiency is up to 93%. The whole process is automatic control, easy operation and maintenance. | |||
2.'''Less investment:''' application of small area can save 80% of the investment, and it is especially suitable for the old-line transformation. It can make use of abandoned or idle kiln, mill, tower, library and horizontal dryer, etc. further reducing the investment. | |||
3.'''Widely used:''' drying clay, slag, fly ash, coal, iron, mineral processing, chemical, foundry and other industries of material drying. | |||
4.'''Long life:''' the internal components is used in all heat-resistant alloy, long life, low failure rate. | |||
==='''Application'''=== | |||
The key technology of vertical dryer is to control the flow rate and residence time of the material in every area of the dryer, making the hot flue gas fully convected, radiated and heat conducted with the material which thus can be scattered in the dryer as far as possible to enlarge the contact area between the hot smoke and the material. At the same time, material drying parameter optimization microcomputer software technology has been adopted to proceed online detection to the material moisture and gas temperature in the preheating zone, stoving zone and drying zone, and adjust the system parameters on line such as heating ability, lead-wind quantity, secondary hot wind distribution, heat supply capacity, material closure capacity and retention time,etc., realizing dynamic optimization balance of the system and improving the heat utilization rate. | |||
==='''Typical Usage'''=== | |||
* Permanent blending and intensive contact between the product and the heated wall ensure for an above-average heat transfer. | |||
* Suitably designed agitators make the plant ideal for concentrating liquids and sludge. | |||
* The agitator can be heated and shaped in such a way that an extremely high evaporation performance can be achieved. | |||
* A lifting column can be used either to move the entire device, to lift the cover with agitator or to lower the mixing container. The lifting column also facilitates filling and emptying in tight spaces. | |||