Professional production of centrifuge separator and pharmaceutical machinery manufacturer - Zonelink
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Professional production of centrifuge separator and pharmaceutical machinery manufacturer - Zonelink
The machine is a horizontal screw discharge sedimentation centrifuge. The main machine is composed of cylinder-cone drum, screw discharger, differential system, bearing seat, frame, cover, main and auxiliary motor and electrical system. The working principle is as follows: the suspension enters the drum through the feed pipe and the spiral discharge port. Under the centrifugal force generated by high-speed rotation, the solid particles with a larger proportion are deposited on the inner wall of the drum. The spiral blade that moves relative to the drum continuously scrapes the solid particles deposited on the inner wall of the drum and pushes out the slag discharge port. The relative motion between the screw and the drum, that is, the differential speed, is achieved by the differential, and its size is controlled by the auxiliary motor. The housing of the differential is connected with the drum, the output shaft is connected with the helix, and the input shaft is connected with the auxiliary motor. The main motor drives the rotation of the drum and also drives the rotation of the differential housing. The auxiliary motor controls the speed of the input shaft of the differential through the connection of the coupling. The differential can transfer the torque to the screw according to a certain speed ratio, so as to realize the continuous separation process of the centrifuge.
What is decanter centrifuge structure and principle
The horizontal decanter centrifuge composed of cylinder-cone drum, screw discharger, differential system, bearing seat, frame, cover, main and auxiliary motor and electrical system. The working principle is as follows: the suspension enters the drum through the feed pipe and the spiral discharge port. Under the centrifugal force generated by high-speed rotation, the solid particles with a larger proportionare deposited on the inner wall of the drum. The spiral blade that moves relative to the drum continuously scrapes the solid particles deposited on the inner wall of the drum and pushes out the slag discharge port. The relative motion between the screw and the drum, that is, the differential speed, is achieved by the differential, and its size is controlled by the auxiliary motor.
The housing of the differential is connected with the drum, the output shaft is connected with the helix, and the input shaft is connected with the auxiliary motor. The main motor drives the rotation of the drum and also drives the rotation of the differential housing. The auxiliary motor controls the speed of the input shaft of the differential through the connection of the coupling. The differential can transfer the torque to the screw according to a certain speed ratio, so as to realize the continuous separation process of the centrifuge.
The decanter centrifuge main use
Used to deal with solid particles fine, slippery suspension of any concentration, that is, the concentration fluctuation of the suspension does not affect the separation effect. It can be used to deal with the three-phase mixture (liquidliquid-solid) where the density of solid is higher than that of liquid and the liquid emulsion has a density difference. It can also be used to deal with the separation of liquid-solid suspension. Such as: all kinds of fermentation liquid solidliquid separation, coal tar liquid-liquid-solid three-phase separation and palm oil three-phase separation.
Decanter centrifuge technical parameters: main technical parameters
Item Model | LW450*1800 | ||
Drum inner diameter (mm) | 450 | Length-diameter ratio (effective length of drum L/ inner diameter D of large end of drum) | 4 |
Differential speed The difference between the absolute speed of the drum and the absolute speed of the screw pusher. | 0.1 ~ 35r/min stepless adjustable | Production capacity (L/h) | Water flow: 30 tons/hour
Know the amount of material feed according to the actual material condition. |
Design speed Operating speed | Variable frequency speed adjustment below 3300r/min Variable frequency speed adjustment below 3000r/min | Maximum design separation factor | Variable frequency speed adjustment below 2744r/min |
Main motor power | 37KW (220V/3/60HZ) three-phase AC asynchronous motor is selected | Auxiliary motor power | 11KW(220V/3/60HZ) three-phase AC asynchronous motor is selected |
Motor protection class | IP54 | Motor insulation class | E Grade |
Operating decibel | ≤85dB(A | No-load vibration intensity | ≤4.5mm/s |
Overall dimensions (L * W * H) | 3348*1700*1124 | Machine weight (KG) | 3700 |
Note:
1. The differential adopts the planetary gear structure with large bearing capacity and stable and reliable operation
2. Double motor double frequency drive system, realize the difference speed stepless adjustable energy feedback
3. The inner surface of the centrifuge drum is equipped with longitudinal stainless steel anti-wear strip to effectively prevent the inner wall of the drum from wearing out, which is conducive to the residue being pushed out.
4. Centrifuge supporting cleaning device: In the case of equipment operation and shutdown, the centrifuge hood, drum, spiral and other parts are cleaned.
5. Centrifuge main bearing design life: 50,000 hours
6. Tungsten carbide design life: 10000 hours
7. 7. Centrifuge design life: 20 years
8 Lubrication methods: (1) Main bearing: grease lubrication; (2) Spiral bearings: grease lubrication; (3) Differential: thin oil lubrication
9. Safety protection: safety cover, vibration protection, etc.
10. Centrifug
Decanter centrifuge material
1. Screw discharger material: AISI304
2. Feed port of screw discharger: tungsten carbide surfacing welding
3. Screw discharger blade: Tungsten carbide surfacing welding 4. Drum material: 2304 duplex stainless steel
5. Cone body slag outlet: inlaid with replaceable wear-resistant ceramic bushing 6. Centrifuge drum inner surface longitudinal anti-wear strip: AISI304
7. The metal surface of the screw discharger (the part in contact with the material) is pickled to show the metal color 8. Frame material: high quality carbon steel outsourcing stainless steel
9. Frame surface: advanced zinc-rich paint epoxy zinc-rich anti-corrosion primer (DFT dry film thickness 50Mils); Middle layer: cloud iron epoxy primer (DFT dry film thickness 80Mils); Finish: polyurethane enamel (DFT dry film thickness 80Mils).
10. Material of the parts in contact with the material: 304 stainless steel 10. Hood, liquid outlet bucket, slag outlet bucket material: AISI304
11. Main bearing: Germany FAG
12. Main seals: imported oil seal, material nitrile rubber 13. Triangle belt: Mainland brand
14. Grease grade: (1) Main bearing: United States super anti-wear grease (referred to as iron tyrant green grease)
(2) Screw bearing: MOBIL GREASE FM222,PL35LB (food grade)
(3) Differential: British Shell Vane circulation system oil 150#
Decanter centrifuge electrical Part : System description
The main machine of LW250 and LW355 centrifuges is composed of dual motor, double frequency conversion control and energy feedback drive composed of high performance frequency converter. The features of this control system are as follows:
a. The main and auxiliary inverter DC bus are directly connected, which has excellent energy saving effect and obvious power saving effect, and the auxiliary motor is in power generation state when the centrifuge is running, and the continuous working system;
b. Gentle start, wide speed range, can meet the treatment of liquid with different solid content, significantly improve the processing capacity;
c. The main motor and the auxiliary motor are controlled by frequency converter, which realizes the stepless adjustable speed of the centrifuge drum and the difference speed within the design range, and the reasonable difference speed can be obtained by adjusting the speed of the auxiliary motor.
2. Control objects:
One LW450 centrifuge
3. Electrical control requirements (control function) :
(1) The start, stop, speed regulation and overload equal protection of the centrifuge main motor inverter.
(2) The start, stop, speed regulation and overload equal protection of the centrifuge auxiliary motor inverter.
(3) Linkage, interlock, protection, etc., of ancillary equipment
4. Electrical product configuration
(1) The main and auxiliary motors of the centrifuge are Zhejiang Jiangtian motor, AC 220, three-phase, 60Hz.
(2) The inverter adopts Delta brand. The control cabinet is stainless steel.
5. Manufacturing standards for control cabinets
(1) All the control cabinets and switchgear used for low-voltage AC systems are installed and tested in accordance with the technical requirements of the installation of power system protection circuits in IEC439. 220V power supply is directly supplied to each cabinet, and the cable entry method is cable entry. The user provides 220V (three-phase four-wire) low-voltage power supply. The electrical control cabinet is provided with a main air switch at the power supply side. The air switch has short circuit and overload protection. Control cabinet anticorrosion treatment is hot dip galvanized after spraying plastic.
(2) Main technical parameters:
Rated insulation voltage: 660V or customized voltage
Rated operating voltage: 380V or customized voltage
The main equipment in the cabinet meets GB or IEC standards of the International Electronic and Electrical Commission, and the automatic air switch meets IEC974-2 standards. (3) Contactor and terminal mark comply with the following standards: IEC847-4, IEC445.
Contact operating power complies with IEC947-5
The rated insulation voltage complies with IEC337-1
(4) overload relay and in line with IEC947-4 standard, its protection level in line with the current national standards, tripping level in line with IEC947-1 Standard.
(5) The intermediate relay conforms to IEC65, IEC435 standards, adopts building block structure, and is installed on the guide rail.
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