ZK DDGS Dewatering Centrifuge for Use in DDGS Separation Process
Corn, wood, rice, wheat starch, etc. are the most widely used raw materials in the alcohol industry. More and more alcohol producers after fermentation and distillation use a centrifuge to remove water, which solves the issues in large-scale conventional filtration equipment, ranging from large land occupation to high labor intensity, and high later-stage maintenance cost. At the same time, by virtue of high efficiency, stability and environmental protection, it provides guarantee for efficient dehydration, DDGS quality, and subsequent process energy conservation. When corn and cassava are used as raw materials, the high sand content in the acid solution is an important factor affecting the stability and service life of the decanter. The whole ZK ddgs dewatering decanter is equipped with high-performance wear-resistant protective materials to greatly extends the maintenance cycle and ensure annual normal running time.
DDGS Separation Centrifuge Parameters
|Model||LW250 x 1025C||LW350 x 1435C||LW430 x 1850C||LW450 x 1845C||LW520 x 2150C||LW580 x 2400C||LW650 x 2600C|
|Max G Force||3500||3136||2784||2913||2981||2948||2854|
|Main Motor (kW)||7.5 ~ 11||15 ~ 22||30 ~ 37||30 ~ 37||45 ~ 55||75 ~ 90||90 ~ 110|
|Back Motor (kW)||4||5.5||7.5 ~ 11||11 ~ 15||15 ~ 18.5||22||30|
|Capacity (m3/h)||3 ~ 4||4 ~ 5.5||7.5 ~ 11||7.5 ~ 11||11 ~ 15||15 ~ 18.5||18.5 ~ 22|
|Drive Type||VFD + PLC + HMI|
|Bowl Material||SUS2205(Duplex Stainless Steel) / SUS2304 (Duplex Stainless Steel) / 316L / 316 Centrifugal Casting|
|Screw Material||SUS2205(Duplex Stainless Steel) / SUS2304 (Duplex Stainless Steel) / 316L / 316 Centrifugal Casting|
|Bearing||SKF / NSK|
Technical Characteristics of ZK DDGS Decanter
- The DDGS high efficiency centrifuge fully draws on the working principle of the lamella settler. To improve the clarity of the supernatant after centrifuge separation, a certain number of solid particles capturing plates (referred to as spiral plates) are added to the screw conveyor at the clarification section. When the solid suspended particles flow through the spiral ramp, part of them can be effectively attached to the spiral ramp and slide along it into the blades of the screw conveyor to realize continuous slag discharging. Compared with common centrifuges, it can increase 20~30% in solid recovery rate.
- The DDGS slurry produced with different raw materials through different processes has different degrees of corrosiveness, such as hydrochloric acid or sulfuric acid used at the acid chemical section, amino acid or acetic acid produced by fermentation. Therefore, the decanter has some requirements on the selection of wear-resistant materials.
- The dehydration of solid particles relies mainly on strong centrifugal force, high-torque spin extrusion force (pushing torque), and ultra-long solid particle dehydration length. The centrifuge can generate centrifugal force exceeding 3000G, 30 ~ 50% higher than the screw pushing torque of common centrifuges. The screw pusher torque, and the drum dehydration length is 10 ~ 20% longer than that of common centrifuges.
- The ultra-high pushing torque requires a high-torque involute planetary gear differential as the foundation. The differential equipped on the ddgs dewatering centrifuge features high torque, high speed, low heat generation, and excellent heat dispersion, which ensure that the centrifuge can be used for a long time and stably.
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DDGS Separation Decanter Application Cases
Why Choose ZK Decanter Centrifuge?
The bowl (core component) is made of SAF 2205 duplex stainless steel by centrifugal casting process, and its performance is superior to conventional 304 and 316. All weld joints have undergone flaw detection and thermal treatment, and are provided with certificates of conformity or records for traceability.
The dynamic balance precision of the centrifuge is ≥ Class 2.5, which is superior to the requirement of the standard, so that the centrifuge can be operated smoothly and its longevity is extended. The noise of the complete machine is < 85 dB, the vibration intensity is < 7.1 (load) and 4.5 (no-load). It is equipped with a mechanical and electrical dual overload protection device to ensure safe operation.
Long Service Life
The screw conveyor and bowl adopt of the most advanced, reliable and convenient wear-resistant treatment technology and structure in China. All bearings adopt original imported NSK/SKF bearings. The electric control box is made of electrical elements of famous brands such as Siemens and Schneider.
High Degree of Automation
ZK decanter differential speed automatic control technology can automatically adjust the screw conveyor’s differential speed, to prevent overload and blockage. The complete machine is equipped with bearing temperature sensor and vibration sensor, and is provided with alarms for main motor overload, differential over torque, low differential speed, etc. Meanwhile, its supporting frequency conversion (flameproof) control cabinet can realize automatic start and stop with one key.