Polyvinyl Chloride (PVC)
Polyvinyl Chloride is a thermoplastic polymer also known as PVC. This versatile material is one of today's most important plastics, internationally recognized and proven in the market.
The TURBOSCREEN screen bowl decanter is one of the most advanced developments in solid-liquid separation technology. It combines the process engineering advantages of a sedimenting decanter and a filtering centrifuge in one machine.
All TURBOSCREENs are individually adapted to the product conditions and system requirements
The solids are separated and thickened by sedimentation in the full jacket. This is followed by the downstream screening drum. The screen diameter and design can be adapted to the solids properties of the respective application.
The special design with a large screen drum and bearings on both sides enables high centrifugal forces and long retention times. As a result, slowly sedimenting solids can be separated very well, subsequently washed and dewatered up to the dewatering limit.
Centrate, filtrate and solids are discharged in separate outlets.
Advantages
- Continuous operation
- High yield / minimal solids loss
- Good washing results
- Separate separation of mother and washing liquid possible
- Low residual moisture
- Flexible drive concept
- High machine availability
- Minimal maintenance effort
- Long service life
Operating behavior & mechanical features
The TURBOSCREEN optimally combines the advantages of the solid bowl centrifuge and the screen centrifuge in two working stages.
In the first process step, the solids are pre-dewatered on the drum cone in the full-jacket centrifuge section. The filling volume of the bowl and thus the length of the drying strand is infinitely adjustable via a weir disk. The clarified liquid is decanted via this weir disk.
The pre-thickened solids are discharged via a discharge edge into a downstream, much larger screening drum. Here, in the second working stage, the solids cake is broken up and redistributed with a lower pile corresponding to the larger volume available.
At the same time, the solids cake is subject to considerably higher centrifugal forces due to the large diameter, which makes it easier to filter out the residual liquid.
As relatively little liquid enters the screen section
with the well pre-thickened solids, the amount of fines passing through the screen drum is low and cannot be counted as a loss due to recirculation in the centrifuge.
The generously dimensioned sieve drum with its low solids content is also particularly suitable for washing. The washing liquid is drained separately from the mother liquor.
Hygenic Design | CIP
for processes with the highest hygienic requirements
The name SIEBTECHNIK TEMA is inseparably connected with dewatering tasks under the highest hygienic requirements. The separation of breadcrumbs from frying oil at temperatures of approx. 200°C with the SHORTBOWL decanter centrifuge, the centrifugation of lactose crystals for the production of baby food with the SHORTBOWL decanter centrifuge and the CONTURBEX screen scroll centrifuge or the production of high-purity inorganic salts with our CONTURBEX and pusher centrifuges are just a few examples. Design features include technical separation of the drive and process areas of the centrifuge, advanced sealing systems that are easy to clean by CIP.
To optimize centrifuges for hygienic applications or in areas where CIP must prevent cross-contamination, we use riboflavin tests to verify and optimize cleaning results.
In-house developed and USDA-certified CIP nozzles, in-house developed hygienic fittings, special hygienic surfaces or our sophisticated USDA-compliant sealing technology make many dewatering tasks possible with our centrifuges.
The Drive
Specially designed drive systems for optimal separation results
The solution to a separation problem depends on the drive of the centrifuge. The centrifugal force required for solid-liquid separation is determined by the speed of the bowl or screen. To achieve the right speed for optimum separation results, it is often necessary to keep the speeds variable. Our specialists will customize the required drive control for your application.
In screen scroll centrifuges and decanters, the differential speed of the solids conveying screw to the bowl is also critical. It determines the residence time of the solids in the centrifuge and therefore the separation efficiency.
The correct differential speed for your separation task is determined by selecting the right gear. The differential speed can be constant or variable. In the latter case, the backdrive is used, where the otherwise fixed input shaft of the gear is also driven. If you want to keep the screw speed completely independent of the bowl speed, hydraulic drives (Viscotherm) or two-stage gearboxes with an upstream differential planetary stage are used.
The drive system is continuously monitored to ensure the operational safety of your centrifuge. Overspeed, overcurrent and slippage are detected and reported to the machine control system for action.
Only a drive system specially designed for your separation task will lead to optimum separation results.
Explosion protection | Inertization
Inerting our machines and systems can be necessary for a variety of reasons. In many industrial processes, it is necessary for safety reasons to reliably prevent the formation of an explosive atmosphere caused by dust or gases (ATEX).
In addition, it may be necessary to seal and blanket product spaces with inert gas, such as nitrogen (N₂) or carbon dioxide (CO₂), to prevent oxidation and maintain product quality.
Take advantage of the decades of cross-industry experience of SIEBTECHNIK specialists in sealing and inerting the process chambers of your centrifuges.
We are happy to work with our customers to develop an inerting concept for the integration of our machines into existing or planned systems.
Centrifuge Service
Our reliable service enables optimal operation of your machines and systems
We offer energy optimization, machine monitoring, on-site maintenance & repair service, OEM spare parts, root cause analysis, maintenance & repair kits, inventory analysis, machine history management, personalized technical consulting, training & workshops, 24-hour service, retrofits & upgrades, and used & bridge machines.
Application list
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- Glaubersalz
- Glaubersalz – Natriumsulfat-Decahydrat
- Kaliumchlorid – MOP – KCl
- Kaliumsulfat – SOP
- Biopolymere
- Herbizide – Insektizide
- Insektizide
- Natriumchlorid
- Fermentationsmaische
- Mononatriumglutamat MSG
- Siedesalz – Kochsalz – NaCl
- Süßstoff – Zuckerersatzstoffe
- Zucker
- Expandiertes Polystyrol EPS
- Lactose – Milchzucker
- Polyacrylamid Perlen
- Polypropylen PP
- Polyvinyl Chloride (PVC)
- Eisen(II)-sulfat
- Paracetamol – Tylenol
- Polyacrylate
- Polybutylenadipat-terephthalat (PBAT)
- Polybutylensuccinat (PBS)
- Polyhydroxyalkanoate (PHA)
- Styrol-Acrylnitril-Copolymere SAN
- Cellulose und Derivate
- Organische Salze
- Gemüse
- Isomaltulose
- Kaffeeextrakt
- Polymethylmethacrylat PMMA
- Polyoxymethylen POM
- Bisphenol A
- Kohle Koks
- Threonin
- PVC (Recycling)
- Low Density Polyethylen LDPE
- Carbonsäurederivat
- Acetylsalicylsäure – Aspirin
- Calzium-Laktat
- Magnesium-Laktat
- Diammoniumdimolybdat
- Ammoniumperoxodisulfat
- Aminosäuren
- Karottensaft
- Chloriertes Polyethylen CPE
- Isomaltose
- Vitamin C
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Screen decanter TURBOSCREEN type TSDT 1100
TURBOSCREEN sieve decanter - auger
TURBOSCREEN sieve decanter
System Solutions
System solutions, everything from one source, directly from the OEM.
CONTHICK screen bowl decanter centrifuge
The CONTHICK screen bowl decanter centrifuge is a combination machine consisting of a solid-wall drum in the product feed zone and a downstream screening drum.
SHORTBOWL decanter centrifuge
Due to the special geometry of the rotating parts, the SHORTBOWL decanter centrifuge - solid bowl is best suited for separating fine solid particles with a high specific density difference to the liquid phase.
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