23" Cooking Waste Oil 2 Phase Separation Solid Bowl Decanter
Centrifuge
Kitchen waste, commonly known as lame, is also known as swill, drowning, food
processing waste (food waste) and edible residue (squat). Its
composition is complex, mainly oil, water, peel, vegetables, rice
noodles, fish, meat, bones and a mixture of waste utensils,
plastics, paper towels and other substances. From the chemical
composition, there are starch, cellulose, protein, lipids and
inorganic salts.
★ Technical features of Centrifuges:
1. With a wide range of applications and strong compatibility, it
can handle all kinds of organic wastes, including kitchen wastes,
rubbishes after dining, vegetable market wastes, and agriculture
and forestry wastes.
2. With patented multi-stage crushing technology, it can achieve
100% crushing and utilization of organic matters to avoiding waste,
enhance utilization of organic matters, and improve economic
benefits.
3. With patented flexible limit crushing technology, it can realize
the maximum separation of inorganic substances to avoid the
inorganic substances from mixing with the organic slurry and
prevent the inorganic substances from affecting the treatment
effect of subsequent process, and to protect the normal operation
of subsequent processing equipment.
4. The treatment process is safe and environmentally friendly, and
free of pollution discharge such as wastewater and waste gas. The
wastewater can be recycled after treatment, which is economical and
energy-saving.
I. Kitchen wastes pretreatment system
Our pretreatment system consists of a stainless-steel storage and
feeding system, a double-shaft shredder, a screw conveyor, a
pipe-type magnetic separator, a kitchen pulper, a belt conveyor, a
slurry tank, a transfer pump, pipes, detection instruments, etc.;
The collected swill is poured into the stainless-steel storage and
feeding system (with shaftless screw conveyor), and the solid is
transported from the shaftless screw conveyor to the slag
discharging port on top, and discharged to the double-shaft
shredder for crushing. The liquid in the swill (containing fine
slurry particles) enters the water tank through the screen of the
stainless-steel storage and feeding system, which is furnished with
a backwashing device that can effectively prevent the screen from
being clogged. The stainless-steel bin has a grille net to prevent
some large pieces (plastic barrels, glass bottles, etc.) from being
mixed into the shaftless screw conveyor.
The kitchen pulper is filled with 80°C or higher water in the
pulping process to clean its screen. The light materials like
plastics crushed by the kitchen pulper are discharged from the slag
discharging port of the kitchen pulper and sent to the inorganic
collection box through a belt conveyor; the slurry generated is
discharged from the slurry port of the kitchen pulper to enter a
screw extruder with a filter to form a long strip-shaped
large-grain type solid to be removed. After that, the slurry is
discharged from the screw extruder to the slurry tank.
The slurry produced by the liquid collection bin of the
stainless-steel feeding system, the liquid collection bin of the
shaftless screw conveyor, and the screw extruder enters the slurry
tank. After removal of large gravel, the slurry is sent to the
heating tank with steam heating and stirring functions to be heated
to above 80°C. After 30 minutes of heat preservation, the slurry in
the heating tank is sent to the three-phase centrifuge by a screw
pump for three-phase separation of oil + water + slag.
Stainless steel storage and feeding system double-shaft shredder
Kitchen pulper Screw extruder
II. Kitchen wastes deoiling system
Effect of kitchen waste slurry after treatment by
The kitchen wastes after sorting, crushing, pulping, heating, and
three-phase separation in the centrifuge are as follows:
S/N | Name |
Parameter |
Remarks |
| 01 |
Solid phase (waste residue) solid content % (W/W) | ≥20-25 | Related to regional eating habits |
| 02 |
Light liquid phase (crude oil) water content % (W/W) | ≤3~5 | |
| 03 |
Heavy liquid (kitchen water) solid content % (W/W) | ≤1~2 | |
| 04 | Heavy liquid phase (kitchen water) oil content | No macroscopic oil | |
| 05 | Oil recovery rate % | ≥95 | |
Effect after separation by the three-phase centrifuge
Characteristics of high-efficiency LWS series three-phase
centrifuge
Ingenious, unique and diversified three-phase separation structure.
The liquid separated by the high efficiency three-phase centrifuge
is discharged in two different modes, namely gravity discharging
and discharging through the built-in centripetal pump with
pressure, wherein the latter includes liquid layer fixed mode and
the online adjustable mode of heavy phase liquid layer, which is
selected according to the process conditions.
★ Light phase liquid layer adjustment technology (company patent
technology, patent number: 2018213324892)
The light phase liquid adjustment sheet is concealed, and the
high-efficiency LWS series three-phase centrifuge adopts patented
technology, so that adjustment can be completed without
disassembling the machine.
★ High performance wear-and corrosion-resistant cemented carbide
Because the kitchen waste slurry in the high temperature state
contains corrosive and abrasive substances like salt, glass
fragments, and sandstone, the [ZK Separation] centrifuge has a
certain degree of pertinence in the selection of wear-resistant
materials.
★ High performance stainless steel
After the high temperature hydrolysis of the kitchen waste slurry,
due to finer solid particles and 0.1-0.08 g/cm3 liquid density difference (compared with oil and water), the
centrifuge needs a separation factor of more than 3000G to achieve
the best separation effect. Model SAF2205 with high strength and
corrosion resistance is adopted to ensure the stability and service
life of the centrifuge.
★ Three-phase centrifuge model and technical parameters
| tem |
Unit | LWS250×1025C(X) | LWS350×1435C(X) | LWS450×1845C(X) | LWS520×2150C(X) | LWS580×2400C(X) | LWS650×2600C(X) |
Throughput | m3/h | ≥1 | ≥3~5 | ≥5-10 | ≥10-15 | ≥15-20 | ≥20-30 |
Roller diameter | mm | 250 | 350 | 450 | 520 | 580 | 650 |
Length-to-diameter ratio | | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4 |
Speed | rpm | 5000 | 4000 | 3500 | 3200 | 3000 | 2800 |
Separation factor | | 3500 | 3136 | 3087 | 2982 | 2948 | 2854 |
Differential speed | rpm | 1~50 | 1~35 | 1~34 | 1〜34 | 1~30 | 1~28 |
Main motor power | kW | 11 | 22 | 30 | 45 | 55/75 | 75/90 |
Ancillary motor power (kW) | kW | 4 | 5.5 | 7.5 | 15 | 18.5 | 22 |
Weight | kg | 1250 | 2500 | 4000 | 5200 | 6500 | 8000 |
Boundary dimension (L x W x H) | mm | 2500×800×1150 | 3700×1050×1400 | 3800×1150×1600 | 4800×1250×1800 | 5300×1750×1382 | 5600×1850×1500 |
Note: The throughput is related to material characteristics.
X" indicates that the heavy phase liquid is discharged by the
centripetal pump with back pressure; the overall dimensions vary
with the liquid discharging way of the centrifuge.
★ 2phase Centrifuge model and technical paramete
| Centrifuge model | mm
Drum diameter mm |
Length-to-diameter ratio | rpm
Speed rpm |
Separation factor | rpm
Differential speed rpm | kW
Main motor power kW | kW
Ancillary motor power (kW) | m3/h
Throughput m3/h | kg
Weight (kg) | mm Boundary dimension: (L x W x H) |
| LW250x1025C | 250 | 4.1 | 4500 | 2835 | 1~50 | 11 | 4 | 2~5 | 1250 | 2500×800×1150 |
| LW350x1435C | 350 | 4.1 | 3500 | 2435 | 1~35 | 15-22 | 5.5 | 5〜10 | 2500 | 3700×1050×1200 |
| LW450x1845C | 450 | 4.1 | 3200 | 2580 | 1~34 | 30-37 | 7.5-11 | 8~15 | 4200 | 4300×1150×1450 |
| LW520x2150C | 520 | 4.1 | 3000 | 2620 | 1~34 | 55-75 | 11-15 | 15-25 | 5200 | 5100×1250×1600 |
| LW580x2400C | 580 | 4.1 | 2800 | 2546 | 1~30 | 75-90 | 15-18.5 | 20-35 | 6500 | 5520×1450×1700 |
| LW650x2600C | 650 | 4 | 2600 | 2460 | 1~28 | 90-110 | 22 | 35-45 | 7800 | 6250×2000×1550 |
| LW750x2800C | 750 | 3.7 | 2200 | 2033 | 1~28 | 110-160 | 30 | 40-60 | 11000 | 6500×2200×1600 |
The length dimension varies with motor power.
Project photos:
