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CIP Washing System Horizontal Fermentaion Industry Screw Decanter Centrifuge
I. Alcohol industry
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 centrifuge. The whole [ZK Separation] centrifuge is equipped with high-performance wear-resistant protective materials to greatly extends the maintenance cycle and ensure annual normal running time.
★ Alcohol production process
Common alcohol production process
Technical characteristics of DDGS dedicated high efficiency centrifuge
★ Special spiral structure
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.
★ High performance wear-and corrosion-resistant cemented carbide
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 centrifuge has some requirements on the selection of wear-resistant materials.
★ High-dryness screw conveyor and drum structure
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.
★ High torque involute planetary gear differential
The ultra-high pushing torque requires a high-torque involute planetary gear differential as the foundation. The differential equipped on the 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.
★ High efficiency centrifuge parameter table (DDGS)
Centrifuge model | mm Drum diameter mm | Length-diameter ratio | rpm Speed rpm | Separation factor | rpm Differential speed rpm | kW Main motor power kW | kW Ancillary motor power (kW) | m/3h Throughput m/3h | kg Weight (kg) | mm Boundary dimension mm (L x W x H) |
LW250x1025C | 250 | 4.1 | 5000 | 3500 | 1~50 | 7.5-11 | 3~4 | 1~5 | 1250 | 2500×800×1150 |
LW350x1435C | 350 | 4.1 | 4000 | 3136 | 1~35 | 15-22 | 4-5.5 | 5~10 | 2500 | 3700×1050×1200 |
LW430x1850C | 430 | 4.3 | 3400 | 2784 | 1~36 | 30-37 | 7.5-11 | 15-18 | 4000 | 4300×1150×1400 |
LW450x1845C | 450 | 4.1 | 3400 | 2913 | 1~34 | 30-37 | 7.5-11 | 15-20 | 4200 | 4300×1150×1450 |
LW520x2150C | 520 | 4.1 | 3200 | 2981 | 1~34 | 45-55 | 11-15 | 25-30 | 5200 | 5100×1250×1600 |
LW580x2400C | 580 | 4.1 | 3000 | 2948 | 1~30 | 75-90 | 15-18.5 | 30-35 | 6500 | 5520×1450×1700 |
LW650x2600C | 650 | 4 | 2800 | 2854 | 1~28 | 90-110 | 18.5-22 | 35-40 | 7800 | 6250×2000×1550 |
LW750x2800C | 750 | 3.7 | 2500 | 2625 | 1~28 | 132-160 | 30 | 50-60 | 11000 | 6500×2200×1600 |
Note: The throughput is related to material characteristics.
Control method: ① direct control using an inverter (double-motor
double-frequency conversion mode); ② PLC+ touch screen control
(intelligent control mode)
Material: AIS1321, AIS1316, AIS1316L, SAF2205, etc.
Safety protection: devices for measuring vibration and temperature, emergency stop
button, and measures to prevent faulty operation such as hood not
being covered.
II. Technical characteristics of the high-efficiency centrifuge for
glutamic acid
★ Special spiral structure
The high-efficiency centrifuge for glutamic acid fully considers the number of solids in the high-concentration glutamic acid slurry, and fully adopts the variable pitch technology in the structural design process, exerting the slag conveying performance of the spiral blade to the maximum extent without causing the lifting angle of the spiral blade to disturb the solid particles and effectively improving the processing capacity of the centrifuge.
★ High performance wear-and corrosion-resistant cemented carbide
The thickness of the massive solid residues produced from high-concentration glutamic acid slurry in the drum is more than double of that in the conventional industry, so that it is necessary to adopt a higher level of wear-resistant technology.
★ Humanized process design
After the first separation of glutamic acid, it is necessary to consider diluting it with water to carry out the second separation process. The high-efficiency centrifuge for glutamic acid is equipped with a dilution water nozzle at the slag outlet of first separation.
★ High torque involute planetary gear differential
The ultra-high pushing torque produced from massive solid residues in the conveying process requires a high-torque involute planetary gear differential as the foundation. The differential equipped on the 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.
★ CIP washing system
The fully automatic control system is equipped with a CIP washing system, which can effectively solve the problem that it is not completely cleaned during the shutdown process and effectively avoid the equipment troubles caused by artificial factors.
★ Parameter table for high efficiency centrifuge dedicated to glutamic acid (first and second separation of glutamic acid)
Centrifuge model | mm Drum diameter mm | Length-diameter ratio | rpm Speed rpm | Separation factor | rpm Differential speed rpm | kW Main motor power kW | kW Ancillary motor power (kW) | m/3h Throughput m/3h | kg Weight (kg) | mm Boundary dimension mm (L x W x H) |
LW450x1845C | 450 | 4.1 | 3000 | 2268 | 1~34 | 30-37 | 11-15 | 6~12 | 4200 | 4300×1150×1450 |
LW520x2150C | 520 | 4.1 | 2800 | 2283 | 1~34 | 45-55 | 15-18.5 | 8~15 | 5200 | 5100×1250×1600 |
LW580x2400C | 580 | 4.1 | 2800 | 2546 | 1~30 | 75-90 | 18.5-22 | 15-20 | 6500 | 5520×1450×1700 |
LW650x2600C | 650 | 4 | 2800 | 2854 | 1~28 | 90-110 | 18.5-22 | 25-30 | 7800 | 6250×2000×1550 |
LW750x2800C | 750 | 3.7 | 2500 | 2625 | 1~28 | 110-160 | 22-30 | 30-50 | 11000 | 6500×2200×1600 |