Treatment of Sand and Gravel Washing Water Decanter Centrifuge

Product Description

Treatment of sand and gravel washing water Save up to 90% on water costs while meeting strict environmental regulations High-performance centrifuge system eliminates need for costly settling ponds Automated 24/7 operation with advanced wear protection for maximum uptime Recycle water directly 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.

Easy Project handling 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.
Cost savings 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.
Our high-performance centrifuge for the recovery of sand and gravel washing water Water treatment with SHENZHOU industrial centrifuges 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
Customer benefits Sustainable management with water recycling 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.

Low fresh water consumption Recirculation of over 90% of the processed water into the washing process (depending on the process) No return of process water to the environment Closed process water circuit Reduction or elimination of sedimentation basins and lagoons Reliable high-performance decanter for gravel and sand processing shenzhou decanter centrifuges can continuously process high sludge quantities. Sand and gravel can thus be fully automatically processed in parallel operation. Designed for mining work, the machine has highly efficient wear protection on the screw and rotor. The centrifuge works as a closed system and separates even the finest solids from the washing water. Thanks to the shenzhou drive system, it automatically adjusts to different feed volumes and, if necessary, to fluctuating solids concentrations in the incoming sludge. A high dry matter content in the discharged solids enables the material to be conveniently conveyed or loaded. At the same time, recycled water is clean and virtually free of solids.
High sewage efficiency to increase uptime of your wet treatment Continuous processing of large amounts of sludge Designed with high material quality and high wear protection for processing abrasive sludges etc. Low energy consumption and high flexibility under varying load conditions
FAQ
Q1: Where can I get product & price information?
A1: Send us inquiry or email directly, then we will contact you ASAP.
Q2: How can I make sure your machinery is suitable for me?
A2: Please tell all the separation information you know, such as your raw liquid,
two-phase or three-phase separation, solid content in liquid, solid size, the purpose, etc. After analyzing your information, we will to choose a suitable model for you, and send the details and videos to you.
Q3: What should I do if I want to see the separation effect?
A3: If you can come to our factory with the raw liquid, we will provide test service. Or you deliver the raw liquid to us, and we will do a test, and supply you the testing videos.
Q4: How to enjoy the OEM services?
A4: As the manufacturer of the machine, we will try our best to satisfy you if you have any specific requirement, such as the cover device, drum size, motor voltage, etc.

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