CE Approved Direct Factory High Quality Industrial Decanter Centrifuge for Waste Oil Separation

Product Description

Definition of Used Oil Used oil is defined as any oil originating in crude oil or petroleum with physical or chemical impurities as contaminants from its use.
The United States produces over 2 Billion gallons of used oil annually. This oil has considerable value as a heating fuel and for reblending into lube oil after recycling.
Difference Between Used Oil and Waste Oil Used oil has mineral-based origins, as in crude oil or synthetic oil. Used engine oil, transformer oil, turbine lube oil, etc., are examples of used oil.
On the other hand, Waste oil is an oil with organic origin such as WVO (Waste Vegetable Oil), Used Cooking Oil, yellow grease, etc.
Reclaiming Used Oil Used oil reclamation is a thriving industry that collects and purifies used oil in large quantities. These industries use different types of separation techniques that are listed below in the methods section.
Benefits of Used Oil Reclamation The commercial reclamation of used oil has multiple benefits from a commercial and environmental perspective. Some of these benefits are listed below.
Reduce Environmental Pollution Used oil discarded in landfills is a significant source of environmental pollution. It contaminates groundwater and soil. Recovery of used oil prevents this pollution.
Feed Stock for Fresh Lube Oil Refined used oil is a feedstock for the production of virgin lubricating oil. This process allows for the reuse of used oil as a low-cost and environmentally friendly alternative.
Heating Fuel A considerable amount of used oil finds use in heating industrial buildings. Though contaminated, used oil has a high calorific value and is ideal for heating fuel.
Black Diesel (Diesel Blend for Engines) Purified used oil is also known as black diesel. This name comes from the use of this oil as fuel for diesel engines. The blend of diesel and used oil is allowable by the manufacturers of large diesel engines.
Methods of Used Oil Recovery Heating, Settling, and Filtration A used oil filtration system includes tanks, heaters, multi-bank filters, pumps, etc. The typical process involves the following steps.
Pre-straining the incoming oil: In this step, the freshly collected used oil passes through a coarse strainer (½") to remove large debris such as rocks, twigs, nuts, bolts, etc. Heating and settling: An air diaphragm or similar pump transfers the used oil to a storage tank with heating coils or a circulation heater. The increase in oil temperature causes the water and sludge to drop out. Draining water: The operator then drains the water out of the settling tank from a drain port above the sludge level. Clean oil recovery: The remaining oil layer is siphoned from the top and is the clean oil from this system. Filtering & Distilling: The 'clean oil' recovered from the siphoning carries entrained water and fine sludge particles from the used oil. This oil is passed through a bank of filters or progressively finer mesh size to remove the small particles. Vacuum distillation removes the entrained water. Centrifugation An industrial oil centrifuge combines most of the recovery mentioned above steps into one device that uses highly amplified centrifugal force to separate the oil from water and sediment. These centrifuges are continuous processing devices that offer high separation efficiency with a small footprint.
Used Oil Centrifuge A used oil centrifuge is an industrial disc-stack centrifuge that exerts over 7,000 Gs of centrifugal force on the oil. This force is sufficient to separate all free water and sediment as small as 0.5 microns. The self-cleaning feature of the centrifuge allows it to eject the separated solids intermittently while the separated water exits the centrifuge continuously.
Read our new article: 6MGY Used Oil Centrifuge Plant Layout
Operation A used oil centrifuge works on the principle of differential settling of the different phases in used oil based on their respective specific gravity. The contaminated oil enters the rotating centrifuge bowl through an inlet pipe and passes through the rotating stack of discs within the bowl. The rotating discs impart the rotational velocity to the oil and its contaminants.
The heavier sludge moves towards the bowl wall due to the high centrifugal force. This sludge displaces the lighter oil towards the center from where the separated oil enters an exit chamber before discharge from the bowl.
The sludge and water (if any) accumulate at the bowl wall, and the centrifuge automatically ejects the sludge periodically. The centrifuge bowl has a passage for the separated water, which allows the water to discharge through.
FAQ Why is a used oil centrifuge a three phase centrifuge? A used oil centrifuge needs to be a three-phase centrifuge to separate the water and solid particles simultaneously. A two-phase centrifuge will only separate the solids from used oil but not the water.
Is a used oil centrifuge same as a waste oil centrifuge? A used oil centrifuge is very similar to a waste oil centrifuge. Both are three-phase centrifuges capable of separating oil from water and sludge. A used oil centrifuge may require some modifications to accommodate chemicals such as acids in the process.
Can used oil centrifuges separate emulsified oil? A used oil centrifuge can separate oil emulsions to a certain extent. Disc stack centrifuges cannot separate chemically bonded emulsions without the use of demulsifiers.
What is the smallest particle a used oil centrifuge can separate? A used oil centrifuge (disc-stack) can separate metal particles down to 0.5-microns. Non-metal particle separation efficiency is typically around 2-microns.
Do used oil centrifuges use filters or replaceable media? Disc stack centrifuges for used oil do not use any filters or media. These centrifuges use the amplified force of gravity (centrifugal force) to separate water and sludge from used oil.
Can used oil centrifuges separate ash from used motor oil? Used oil centrifuges of the disc-stack type can remove some of the ash content from used motor oil. Ash particles are microscopic carbon particles, and the centrifuge's separation ability is limited to such tiny particles separation.
Separation Efficiency One of the advantages of using an industrial centrifuge for waste oil separation is the separation efficiency of these centrifugal separators.
Particle Separation A disc-stack centrifuge has a separation efficiency of 0.5 microns for metal particles and 2 microns for non-metal particles.
Water Removal In addition to particle removal, a used oil centrifuge also simultaneously separates all free water from the oil. This centrifuge can also break oil-water emulsions and recover more oil under certain conditions as an added benefit.
Ash Ash particles impart a black color to used oil. Though these particles are sub-micron level in size and light, the high centrifugal force in a disc-stack centrifuge can separate a considerable amount of ash from used oil. Flocculants enhance this ash separation ability further as they solidify some finer ash particles into larger particles that the centrifuge can separate.
Emulsion Breaking Used oil often carries an emulsion phase that is difficult to separate by gravity settling without chemicals. Disc stack centrifuges can break oil emulsion to a certain extent based on the emulsion type.
Chemically bonded emulsions need acid treatment or demulsifiers to separate the oil from the water.
Industrial centrifuges with high centrifugal force can extract the microparticles that act as nucleoids, thus assisting in emulsion breakdown.
Benefits There are several benefits to using centrifuges for used oil purification compared to gravity settling and filtration. The following is a list of the advantages.
Three Phase Separation Disc stack centrifuges separate water and sludge simultaneously from used oil. This ability is referred to as three-phase separation and is unique to disc-stack centrifugal separation.
Filters and gravity separation are only helpful for separating sludge from used oil but not water.
Small Footprint Disc stack centrifuges have a relatively smaller footprint than conventional devices for used oil purification. A used oil centrifuge has a fraction of the size of filters and settling tanks for similar capacity.
Operating Cost Used oil centrifuges use gravitational force to affect oil-water separation. These centrifuges do not use media for separation, thus eliminating the media and related labor costs. Therefore, industrial centrifuges have very low operating costs as compared to filters and tanks.
Separation Efficiency The particle separation efficiency in the case of settling and filtration depends on the filter media. Filter media with a tiny mesh size tends to need frequent replacement, and the related costs add up.
Oil centrifuges separate a range of particle sizes that would otherwise require multiple filters of different sizes. The smallest particle size rating for a centrifuge is 0.5 microns.
Emulsion Separation In addition to microscopic particle size separation, disc stack centrifuges can often break oil-water emulsions by extracting the tiny particles that bind mechanical emulsions. The emulsion-breaking ability depends on the emulsions and may require chemical demulsifiers to assist in the separation.
Equipment Durability & Longevity Industrial centrifuges incorporate heavy-duty construction that allows these centrifuges to last for decades of operation. In addition, with periodic maintenance, these centrifuges operate continuously over extended periods without needing a stoppage. In other words, it is not uncommon for industrial centrifuges to operate for months without the need for shutdown or operator involvement.
Disadvantages The following list of the most prominent disadvantages of used oil centrifuges.
Capital Cost The initial capital expenditure for centrifuges is relatively higher than for filters and tanks. However, the lower operating costs and labor cost savings quickly recover the additional expense.
Utilities Required Used oil centrifuges are mechanically driven and therefore require utilities such as electricity and water for operation. Filters are primarily non-moving media that do not require utilities for operation.
Noise The rotating components in anShenzhou used oil centrifuge create noise from the gears and drive motors as well as the air movement within the centrifuge also generates noise. Filters, on the other hand, are relatively quiet during operation.
Maintenance All mechanical devices that operate at high rotational speeds require periodic maintenance. This upkeep ensures reliable operation of the equipment as well as equipment longevity.
Filters only need to be replaced with new media on an ongoing basis with little maintenance.
Design Considerations Specific design considerations apply to used oil centrifuges. Some of the important considerations are as follows.
Acidic Material Used oil processors use acids to dissolve and remove metals and break emulsions. The low pH value of the oil necessitates the use of corrosion-resistant material in the centrifuges and related piping. Centrifuges with all stainless steel wetted parts are available for such applications.
Chemical Injection The provision of chemical injection ports upstream of the centrifuge allows adding chemicals such as demulsifiers or flocculants. Metering chemical pumps as an option are well suited for these applications.
Water Phase Proportion The standard disc stack centrifuges design uses large volumes of oil with a small proportion of water. However, the water proportion can be relatively high in the case of used oil.
Some internal centrifuge modifications allow for the discharge of this larger volume of water to allow the centrifuge to process maximum volumes.
Special Elastomers Adding chemicals or inherent used oil properties may not be compatible with ordinary elastomers. In such cases, the centrifuges have special elastomers with specific compatibility for the process fluid.
3-Phase Centrifueg Features
NO MATTER IF FEED CONCENTRATION VARIES
The ShenzhouTricanter® discharges the heavy liquid through an adjustable impeller under pressure and the light phase by gravity. The variable impeller allows for precise on-the-fly adjustment of the pond
Specification

Model	Diameter(mm)	Lenght(mm)	Max speed	L/D ratio	G-force	Capacity(m3/h)	Main motor power(Kw)	Weight(kg)	Dimension (mm)
LW250*1000	250	1000	5000	4	2722	0.5-5	7.5	950	2120*1250*680
LW300*900	300	900	4200	3	2964	1-6	11	1160	2150*1300*900
LW300*1200	300	1200	4000	4	2784	2-6	11	1350	2450*1300*900
LW355*1160	355	1160	3600	3.3	2576	2-8	15	1400	2470*1350*830
LW355*1460	355	1460	3600	4	2576	2-10	15	1800	2750*1350*830
LW400*1200	400	1200	3200	3	2294	3-12	18.5	1800	2730*1600*1080
LW400*1600	400	1600	3000	4	2016	3-15	22	2000	3130*1600*1080
LW450*1800	450	1800	2800	4	1976	4-25	37	2500	3320*1700*1130
LW500*2000	500	2000	2800	4	1750	5-35	45	4000	3520*1800*1170
LW530*1855	530	1855	2600	3.5	2006	5-38	55	4680	3885*1350*1600
LW530*2120	530	2120	2400	4	1709	5-40	55	4800	4150*1350*1600
LW550*2000	550	2000	2800	4	2412	6-40	55	5700	4570*1380*1600
LW650*1950	650	1950	2200	3	1761	6-45	75	5000	4840*1510*1720
LW650*2600	650	2600	2200	4	1456	6-65	90	6000	5490*1510*1720
LW720*2160	720	2160	2200	3	1612	7-80	120	6000	5200*1600*1800

Packing & Delivery To better ensure the safety of your goods, professional, environmentally friendly, convenient and efficient packaging services will be provided. Company Profile WE ARE LEADER IN INDUSTRIAL MARKET SINCE 1980
Shenzhou Machinery is a subsidiary of Shenzhou Group.Which was Established In 1980, conveying an Area Of 80000M2 ,there are 2500 Staffs and employee in our company.200 of them are technicians and engineers.It has obtained the approvals and certifications of both CE and ISO.
Some of our machines gained the new technology invent patent. We are on of the world's leading manufacturers of decanter centrifuge,disc centrifuge,tubular centrifuge,separation systems and drying equipment. now there are over 180 series or decanter centrifuges and disc separators used home and abroad.Including U.S.A , Canada ,Australia,Russia ,Brazil,Singapore and so on totally 70 Countries.
We own various kinds of inspection and testing facilities with value Over USD10 Millio, We also welcome OEM and ODM orders.

Customer Waste water treatment Cases: