Ultra low temperature waste dryer
Drying equipment of ultra low temperature specially designed to dehydrate RDF, increasing and stabilizing its calorific value, thus enabling a substition rate R.D.F/carbon in high temperature environments of over 35%.
Long permanency of R.D.F inside the equipment caused by a long thermal-dynamic flow in a very limited physical space thanks to a modular vertical design with quadruple cascade from top to bottom using gravity and maximum reduction of surface causing efficiency loss.
Exterior isolation of the interchanging cylinders to avoid condensation and increasing the global efficiency of the system.
A system of by-passes for rapid refrigerating in case of uncontrolled increase of internal temperature of the R.D.F with a possibility to inject Nitrogene/Aire/CO2
In and outlet for R.D.F to be dried are in the same linear position by which this drying equipment can be easily installed in already existing equipment installations , Minimum downtime for existing installations approx. 100 h.
Transition flow areas between the 1st and the 4th stage are equipped with manholes in order to have easy access to electronic level sensors and where R.D.F can be clogged.
All drive mechanisms are installed in the exterior part.
Aluminium housing of high coefficient thermical transmission for indirect injection of latent heat from fluid heat-carrier, easily dismountable.
Equipment totally dismountable and accessible to all its components for maintenance without necessity of dismounting bearings or drive units, which makes this equipment perfectly fit for low quality R.D.F with high variable characteristics.
Equipment totally waterproof and free of emissions of suspended solids.
All drive axles are equipped with pressure retainer and exterior bearings.
Axles free from intermediate supports calculated and simulated through FEM technology with an average lifetime of 50.000 operational hours.
Internal blades are interchangeable and specially designed through CFD technology in order to maximize the turbulence of the fluid heat-carrier by which the drying process will be optimized.
| Diameter rotors | 950 mm |
| Lead of helix | 200 mm |
| Blade of helix | 250 mm |
| Thickness of the blade | 10 mm |
| Stage screw length | 11.000 mm |
| Nº Stages | 4 uts |
| Total length of stages | 44.000 mm |
| Diameter screw axle | 450 mm |
| Dimensions of R.D.F inlet | Round D-1.000 mm |
| Dimensions of R.D.F outlet | Round D-1.000 mm |
| Dimensions inlet of fluid heat-carrier | 800×500 mm |
| Dimensions by-pass of fluid heat-carrier | 800×250 mm |
| Dimensions outlet of fluid heat-carrier | 800×500 mm |
| Diameter housing | 1.000 mm |
| Thickness housing | 5 mm |
| Isolation of interchanging chamber | Synthetic fibre |
| Thickness of isolation of interchanging chamber | 100 mm |
| Stage surface (screws + housings) | 60 m2/stage |
| Total surface (screws + housings) | 240 m2 |
| Nominal speed of rotors | 8 rpm |
| Minimum permanency time of R.D.F to be processed | 30 min |
| Material quality rotors | Stainless steel AISI-304 |
| Material quality housing | Aluminium of high conductivity |
| Material quality screw axles | Stainless steel AISI-304 |
| Material quality of structure | Stainless steel AISI-304 |
| Material quality of screws & bolts | A2 |
| Type of fluid heat-carrier | Tertiary air 90ºC / P=0.04 bar |
| Material to be processed | R.D.F |
| Density of R.D.F | 80-500 Kg/m3 |
| % Humidity of R.D.F at inlet | 50-55% |
| % Humidity of R.D.F at outlet | 2-4 % |
| Production | 110-115 m3/h |
| Traction capacity | 7.5 Kw x 4 stages = 30 Kw |
| Motor protection | IP-55 ABB EF-3 |
| Flow of fluid heat-carrier | 35.000-40.000 m3/h |
| External dimensions | 2.000×12.000 H 6.000mm |
| Weight | 38.120 Kg |
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