Double Motor Variable Frequency Drive Screw Decanter Oil Sludge
Centrifuge
Centrifuge Applications:
1. Wastewater/oilfield oil sludge
2. Food and juice separation(oilve oil, palm oil)
3. Waste Oil separation
4. Chemical Industry
5. Fermentation Industry(beer or wine factory)
6. Food Waste separation (Kitchen waste)
★ Three-phase centrifuge model and technical parameters
Item |
Unit | LWS250×1025B(X) | LWS350×1435B(X) | LWS450×1845B(X) | LWS520×2150B(X) | LWS580×2400B(X) | LWS650×2600B(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 | 1~27 |
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×W×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 will vary depending on the way the
centrifuge is drained.
★ Two-phase centrifuge model and technical parameters
Item |
Unit | LW250×1025B | LW350×1435B | LW450×1845B | LW520×2150B | LW580×2400B |
Throughput | m3/h | 0.5-3 | 3~10 | 8~15 | 15-20 | 20-30 |
Roller diameter | mm | 250 | 350 | 450 | 520 | 580 |
Length-to-diameter ratio | | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 |
Speed | rpm | 5000 | 4000 | 3200 | 3000 | 2800 |
Separation factor | | 3500 | 3136 | 2580 | 2620 | 2546 |
Differential speed | rpm | 1~50 | 1~35 | 1~34 | 1~34 | 1~36 |
Main motor power | kW | 11 | 22 | 30-37 | 45-55 | 75-90 |
Ancillary motor power (kW) | kW | 4 | 5.5 | 7.5 | 15 | 18.5 |
Weight | kg | 1250 | 2500 | 4200 | 5200 | 6500 |
Boundary dimension (L*W*H) | mm | 2500×800×1150 | 3700×1050×1200 | 4300×1150×1450 | 5100×1250×1600 | 5520×1450×1700 |
| Note: The throughput is related to material characteristics. |
I. Oily sludge treatment
Sludge treatment is a complete set of production process, using the
principle of oxidative demulsification and centrifugal separation.
Its main equipment is composed of dosing system, feeding system,
separation system, conveying system, and control system.
After the oily sludge is collected and heated by steam, a suitable
number of additives like demulsifier and active agent are added in
it, so that the oily water in the emulsified state is broken. After
demulsification, a high-efficiency LWS series three-phase
centrifuge is adopted to realize the continuous separation of oil,
water, and slag in the oily sludge, and the water separated and the
oil-water mixture not demulsified are directly sent to the sewage
treatment system for treatment. Then, a LW series two-phase
centrifuge with high efficiency is used for dehydration. The crude
oil residue in the dehydrated slag phase can be recovered by the
combustion or thermal desorption process. The separated crude oil
is collected and then purified by a three-phase flottweg separator.
The purified oil can be reused.
Separation performance:
1, About 80~90% oil can be recovered (relating to oil density,
demulsification effect, temperature, etc.), and the recovered oil
can be used for refining purpose after further purified by the
flottweg separator;
2, The water content of the oil phase after separation can reach ≤3
~ 5%;
3, The dryness of the slag phase after centrifugation can reach 40
~ 60%, and its total volume is reduced by over 80% compared to that
before separation;
Oily sludge treatment system diagram
III. Drilling oil-based mud solid-waste treatment
Oilfield drilling requires drilling oil-based mud according to the
drilling depth and geological conditions. The mud's basic
composition is oil, water, organic clay, and oil-soluble chemical
treatment agent. OBM resists high temperature and calcium salt
erosion, which is beneficial to the stability and lubrication of
the well wall. The mud features good performance and small damage
to oil and gas layers, and wide application in various types of
drilling platforms. However, the slag generated in the equipment of
drilling solid control system (vibrating screen, centrifuge, and
dryer) has seriously affected the environmental safety and must be
treated in a harmless manner. After treatment, the oil content of
the slag is less than 1% and the oil is further purified and
reused.
The collected drilling OBM solid wastewater is subjected to
high-speed stirring in proportion, and a suitable amount of
demulsifier, active agent, and other additives are added, so that
the oily water in the emulsified state is broken. The vibrating
screen is used before separation to remove large particles of soil,
sand, glass bottles, mineral water bottles, convenient bags, gauze,
and other solid wastes, and then the high-efficiency LW series
two-phase centrifuge is adopted to separate continuously the (oil +
water) + slag. After heated by steam, the separated liquid phase
enters the sedimentation tank, in which the supernatant is removed,
and the liquid phase settled at the bottom of the tank is mixed
with the slag phase separated by the centrifuge. The residual oil
is recovered by the thermal desorption process.
Drilling oil-based mud solid waste treatment process
IV. Technical descriptions of the centrifuge
★ Extremely low infrastructure investment and good on-site operating
environment
Compared with the conventional filter-type equipment
(plate-and-frame filter, belt machine, etc.), the high-performance
centrifuge is compact and efficient, covering only about a third of
land, needless of auxiliary gas source, high-pressure water, and
with simpler pipe structures at the inlet and outlet. Moreover, the
operation environment is more humanized, and the skid-mounted
integrated device has the characteristics of compact structure,
convenient installation, low requirements for infrastructure, and
convenient movement. The centrifuge is widely used in the harmless
treatment of oily sludge in oilfield drilling.
★ Stable operation, low failure rate, and low maintenance cost
Compared with the filter type equipment, the centrifuge does not
require any filter cloth or filter screen, so as to avoid the
trouble of clogging and of replacing the filter cloth. The
operation and maintenance costs of the equipment are low.
★ Modular design, easy to operate
Our design philosophy: To lower the requirements on the skills,
educational level, and labor intensity of operators, and realize
one-button start and stop of the control system, fault
self-diagnosis, and safety self-protection.
