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PLC Touch Screen Control Sludge Dewatering Horizontal Oil Sludge Centrifuge

CHENGDU ZK SEPARATION TECHNOLOGY CO., LTD.

PLC Touch Screen Control Sludge Dewatering Horizontal Oil Sludge Centrifuge

Brand Name : ZK SEPARATION

Model Number : LW or LWS

Place of Origin : Chengdu, China

MOQ : 1

Price : Negotiable

Payment Terms : L/C, T/T

Supply Ability : 30 units each months

Delivery Time : 1-3months

Packaging Details : Simple iron frame

Certification : ISO9000

Motor power : 380/460V

Motor frequency : 50Hz/60Hz

Control panel : PLC display screen

Drive : VFD

Application 1 : Oily (waste) water treatment

Application2 : Refinery factory Oily sludge treatment

Application 3 : Drilling oil-based mud solid-waste treatment

Advantage 1 : Light phase liquid layer adjustment technology

Advantage 2 : Variable pitch technology

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PLC Touch Screen Control Sludge Dewatering Horizontal Oil Sludge Centrifuge
I. Oily sludge treatment
Production of oily sludge
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;
★ 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.
Oily sludge treatment system diagram
PLC Touch Screen Control Sludge Dewatering Horizontal Oil Sludge Centrifuge
II. Oily (waste) water treatment
At present, the oily (waste) water generated in the course of processing crude oil in the refinery is often treated by rough flocculation + dehydration. The slag phase is directly incinerated after dehydration. This treatment mode causes waste of crude oil resources. Now we can apply a series of pretreatment processes (adding demulsifier, surfactant, etc.) and then use the high-efficiency LWS series three-phase centrifuge to realize the reuse of crude oil resources.
After the oily (waste) water is collected, a suitable amount of demulsifier, an active agent, etc. are added, so that the oily water in the emulsified state is broken, and the oily (waste) water after demulsification is naturally settled and separated in an oil trap. The water in the middle layer of the oil trap and the oil-water mixture not demulsified are directly sent to the sewage treatment system for treatment. The task of dehydration can be completed by the high efficiency LW series two-phase centrifuge. The oil floating on the upper layer of the oil trap and the sludge settled on the bottom layer are collected and sent into the stirring tank for further treatment. The oil, water, and slag in the oily sludge treated can be separated continuously from each other through the high-efficiency LWS series three-phase centrifuge.
For the treatment of oily (waste) water, the purpose is to recover more oil and reduce the oil content in the solid. Therefore, the role of each section in the whole process system is very important.
1. Demulsifier and surfactant can improve the efficiency of demulsification, enhance the subsequent separation efficiency, increase the oil recovery rate, and reduce the oil content in the slag phase.
2. Heating can reduce oil viscosity, improve the oil recovery rate, and lower the solid contents of oil and water.
3. Adding PAM flocculant can increase the solid recovery rate and reduce the solid content in the liquid phase.
4. Separation of oil, water, and slag with the high-efficiency LWS series three-phase centrifuge can improve the separation efficiency, enhance the oil recovery rate, and reduce the oil content of the slag phase.
5.Solid-liquid separation realized by using a high-efficiency LW series two-phase centrifuge can reduce the liquid content of the slag phase, facilitate transportation, and increase the combustion heat value.
Separation performance:
1. About 80~95% 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 wastewater treatment flow chart
PLC Touch Screen Control Sludge Dewatering Horizontal Oil Sludge Centrifuge
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.
Separation performance:
1,It can recover about 90% of oil (relating to demulsification effect, temperature, etc.);
2,The solid content of the liquid phase after separation can reach ≤5~8%;
3,The dryness of the slag phase after separation can reach 40 ~ 60%;
Drilling oil-based mud solid waste treatment process
PLC Touch Screen Control Sludge Dewatering Horizontal Oil Sludge Centrifuge
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.
Operator configuration and labor intensity
The high-performance centrifuge is an automatic and continuous working mode for feeding-separating-slag (liquid) discharging. The whole process requires no human intervention. Multiple sets of equipment require only one inspector (in conjunction with other positions). Unlike frame and plate-and-frame filter, the slag discharging process does not require manual cutting, greatly reducing the labor intensity of the operator.
Ingenious, unique, and diversified heavy liquid-phase discharging structure
The heavy liquid phase separated by the three-phase centrifuge can adopt two different liquid discharging 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.
High performance wear-and corrosion-resistant cemented carbide
As the oily sludge contains a lot of hard particles and impurities such as sand, glass, and metal, if the centrifuge does not adopt reliable wear-resistant configuration, its service life and running stability will be seriously affected. The wear-resistant solution is completely targeted. According to the material characteristics (pH value, corrosive substance, solid particle size hardness, etc.), cemented carbide or ceramic can be selected, and the cemented carbide can be either YG6, YG8, or various modified tungsten-cobalt alloys with the hardness of 89~93 (HRA), which can fully meet the application fields of the centrifuge.
High performance stainless steel
The high-performance three-phase centrifuge can recover oil by 90%~95% and adapts to the liquid density difference (oil and water comparison) of the gas and oil of different densities (0.1~0.08 g/cm3). The centrifuge needs more than 3000G separation factor to achieve better separation. To ensure the stability and the service life of the centrifuge, high-strength corrosion-resistant duplex stainless steel SAF2205 is used.
★ High-dryness screw conveyor and drum structure
The dehydration of solid particles relies mainly on strong centrifugal force, high-torque screw extrusion force (pushing torque), and ultra-long solid particle dehydration length. The centrifuge can generate centrifugal force exceeding 3000G, 30 ~ 50% higher than the screw pushing torque of common centrifuges. The screw pusher torque, and the drum dehydration length is 10 ~ 20% longer than that of common centrifuges.
High torque involute planetary gear differential
The ultra-high pushing torque requires a high-torque involute planetary gear differential as the foundation. The differential equipped on the centrifuge features high torque, high speed, low heat generation, and excellent heat dispersion, which ensure that the centrifuge can be used for a long time and stably.
PLC Touch Screen Control Sludge Dewatering Horizontal Oil Sludge Centrifuge
Double-motor double-frequency conversion common DC bus constant torque control technology
★ CIP washing system
The fully automatic control system is equipped with a CIP washing system, which can effectively solve the problem that it is not completely cleaned during the shutdown process and effectively avoid the equipment troubles caused by artificial factors.
★ Humanized centrifugal configuration
Spiral bearing (in the drum, concealed) lubrication technology: the lubricant is filled from the outside of the hood. (Unique technology in domestic centrifuges) The hood adopts a hinged opening structure and is equipped with a high-pressure gas strut to assist the opening.
Vibration and temperature sensor (optional) at the position of the main bearing housing.
★ Light phase liquid layer adjustment technology
From the current three-phase centrifuge structure for liquid transportation of centripetal pumps adopted at home and abroad, the adjustment of the light phase liquid layer requires disassembling the centrifuge, and replacement takes more than 8 hours. The centrifuge, with the patented technology of our company, just requires opening the hood to adjust the light phase liquid layer.
Variable pitch technology
Variable pitch technology is a relatively advanced technology in the world. It can effectively reduce the screw pushing torque, improve the processing capacity, and further reduce the sediment water content.
★ Constant torque control technology
The constant torque control of the centrifuge is the most advanced control mode in the world. The real-time monitoring of the actual output torque of the constant torque variable frequency motor through the high-performance auxiliary inverter is compared with the set torque value, and PID is used to adjust the material pushing speed of the screw conveyor in real time. The centrifuge can achieve continuous, stable, and economic operation.
PLC Touch Screen Control Sludge Dewatering Horizontal Oil Sludge Centrifuge

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