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Decanter centrifuges for sludge dewatering separate the fine solids from the water. The clear water can be stored in a washing water reservoir and is immediately available to the washing process again. There is no need to maintain sedimentation ponds that require a lot of space and expensive excavations.
In addition to the machine, the efficiency of the entire process plays an important role in achieving the best results. We take over the engineering for you from project planning to the planning of complete process solutions.
Decanter centrifuges use centrifugal force to separate even the finest particles from the water. At the same time, the volume of the solids and thus the disposal costs are significantly reduced. The more washing water that can be recycled, the less fresh water the sand and gravel mills need.
The washing water to be recycled flows from the wet preparation into the lamella or oblique clarifier. The sludge deposited there is pumped directly into the decanter centrifuge for sludge dewatering. As the centrifuge can process large quantities, interim storage in a stacking tank is generally not necessary.
The water clarified in the decanter is continuously returned to the fresh water reservoir. The dewatered solid falls into a bunker. A wheel loader or belt conveyor brings it from there to the stockpile.
1.The integral design of the machine adopt international advanced type of structure design in recent years, m
otor puts beside, cover flat on flame structure, it causes that the machine maintenance is more convenient, low
noise, small vibration, easy installation.
2.Stainless steel cover adopts enclosed design, peculiar smell gas of the machine in the work is not be leaked.
It leads that the work environment satisfies the requirements.
3.Drum material adopts stainless steel 304.
4.Vibration system adopts drum high modulus of elasticity of absorbing vibration damping device. Compared to
previous models, the machine vibration is greatly reduced.
5.Electrical control adopts double frequency automatic control system
6.The other main components adopt joint venture or wholly-owned or domestic famous brand products.
Technical Parameters
| Model | (Diameter)mm | Rotation speed rpm | Length mm | Separation factor G |
capacity M3/h |
Main motor KW | Vice motor KW |
Dimension: L×D×H |
Machine weight (KG) |
| LW250×1000 | 250 | 3600 | 1000 | 1813 | 1-3 | 7.5/11 | 4/5.5 | 2065×1050×800 | 1100 |
| LW355×1500 | 355 | 3500 | 1200 | 2467 | 3-8 | 11/18.5 | 7.5/11 | 2800×1400×850 | 2000 |
| LW420×1750 | 420 | 3200 | 1750 | 2406 | 4-20 | 30/37 | 11/18.5 | 3120×1580×1050 | 3000 |
| LW450×2000 | 450 | 3000 | 2000 | 2266 | 5─25 | 30/45 | 11/22 | 4320×1050×1180 | 3800 |
| LW500×2100 | 500 | 3000 | 2100 | 2517 | 10-30 | 37/55 | 15/22 | 4500×1110×1200 | 4500 |
| LW550×2200 | 550 | 2800 | 2200 | 2412 | 10-35 | 45/55 | 18.5/30 | 4780×1160×1230 | 5000 |
| LW650×2000 | 650 | 2000 | 2000 | 1454 | 20-50 | 75/90 | 30/37 | 4900×1300×1250 | 6200 |
| LW800×2000 | 800 | 1800 | 2000 | 1450 | 40-100 | 90/110 | 45/55 | 6052×1460×2100 | 10000 |
| LW1000×2350 | 1000 | 1600 | 2350 | 1432 | 50-140 | 110/132 | 55/75 | 6850×1860×2300 | 12800 |
The advantages of our product
1. Industrial design
Whole machine set design follows concept of advanced industrial design,ensures stability,functionality and safety of whole machine.Also effectively absorbs shear force of dynamic load during operation.
2. Effectively ease resonance during rotating of bi-rotor
When centrifuge works,there is no obvious first-order and two-order resonance regions within designed speed range,meanwhile ,whole vibration intensity of bearing seat is definited within 2mm/s-4mm/s.All of this eliminates extra fatigue damage to components and assembly units from high frequency vibration during operation and sudden vibration when shut down.
3. Thoroughly eliminate phenomenon of liquid ring stalling
Phenomenon of liquid ring stalling happens during heavy duty boot or shutdown process of complete set machine,especially for LW550 and even larger models,It would makes bounce or wild shake,causes extra impact fatigue damage to main bearings,screw bearings and inner parts of rotary bowl.Fortunately ,our engineers have solved this problem thoroughly.
4. Unique technique adopt in main component work-blanks
The manufacturing methods of main component work-blanks are adopt centrifugal casting technique and overall mould-making forging technique,thoroughly avoid risks such as inter-granular corrosion and relaxation of residual stress release in welding joint.
5. Main bearing electrical components selection
We use origin bearings of international first-line brands such as S-K-F,F-A-G and so on.Electrical components mainly adopt ABB and Siemens
6. Constant temperature detection
All fashioning components and assembly units are detected in constant temperature condition,to make sure of actual processing quality meets the requirements of designed precision accuracy.
7. Inter-change ability
Whole machine physical design and processing technique adopted in critical position,ensure all assembly units and bowls of the same centrifuge model interchangeable.It is not only easy to maintain ,but also greatly improve the reliability and safety of equipment.
8. Simplyand safely in bearing disassemblement
One layer of oil film is injected into contact surfaces between bearing and work-piece by high-
pressure,during disassemblement bearing from the machine.which would fundamentally eliminate friction within different parts.As a result,it would reduce 90% of pulling force and lower the risk of damage to high-precision parts when disassemble bearing.
9.Main bearing lubrication system
There are two kinds of lubrication system for specific product models :
A thin oil lubrication
* Oil pump offers an uninterruptedly power to ensure oil works circularly;
* Jet oil lubrication constantly clean and lubricate bearings and reduce temperature;
* Oil filter system ensure lubricant's cleanliness;
* Oil pressure energy storage system ensure lubrication pump offers an extra oil supply(the pressure is no less than 0.4Mpa) for 5-6 minutes,when power fails accidentally;
* Constant temperature system is available.
B grease lubrication
* Adopt a grease with properties of extreme pressure resistance ,oxidation resistance ,abrasion resistance,water scour
resistance,corrosion-proof and high temperature resistance.
* Optional automatic grease system fills grease on main bearing at designed hours and quantity.
10. Main bearing BH device (patent design)
There are two spare safe bearings at either end of main bearing.When machine works well,they keep certain clearance from bearing inside track to chief axis.When unexpected condition occurs,main bearing got damaged or circle center deviation causing an amplitude of vibration reaches to designed clearance,safe bearings begin to work as main bearing Meanwhile,computer automatic control system would get a feedback of abnormal vibration value on bearing position immediately then activates emergency shutdown and goes a smooth shut down.This system protects machine free from damaging and ensure production safety.
11. GSRL feeding device (potent design)
New design of internal spiral core tube has got following achieves.Without reducing centrifugal acceleration,shorten triangle belt's traction time,reduce disorder of swirling flow and extend separation time.Meanwhile increases inner working pressure of centrifuge,and restrains liquid foaming
The treatment of sand and gravel requires a lot of water. Water is a scarce resource in many regions of the world, which makes groundwater extraction increasingly more regulated and expensive. Sand and gravel mills can save further by using recycled water to reduce their need for fresh water, but lagoons are not the most efficient way to recycle. The large water surface of lagoons allows for evaporation of the water being stored there, which must be replaced by fresh water.
SHENZHOU systems drain the sludge from wet treatment very efficiently. The clarified water is available to the washing plant again. Depending on the process, over 90 percent of the process water can be recovered. This means that valuable groundwater hardly needs to be used for cleaning. As it is a closed circuit, no process water is returned to the environment. Settling basins or lagoons for the used washing water are reduced or can be partially omitted.
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