Lw Decanter Centrifuge

PRODUCT DESCRIPTION
Horizontal Decanter Centrifuge

Applications: Separation of ultra-fine particle materials and high-viscosity materials, suitable for applications with relatively low solid content materials and high requirements for liquid phase clarity.
Industrial waste
Urban sewage treatment
Starch
antibiotic
Dewatering of soybean and wheat protein
Dewatering of distiller's grains
Coal Tar Separation
Clean coal flotation and slime dewatering
Dewatering of vaporized slag
Dye, Pigment Grading and Dewatering
Drilling sludge treatment
Cellulose dewatering
 

LW Decanter centrifuge

LWX Decanter centrifuge (centripetal pump liquid discharge)

LWXF Explosion-proof decanter centrifuge

Separation principle diagram of LW decanter centrifuge
1 Feed pipe slurry enters, 2 clarifies liquid phase, 3 bowl, 4 slurry enters the bowl directly, 5 screw conveyor, 6 solid phase settles and pushes into the cone end, 7 solid phase outlet

Separation principle: Under the action of centrifugal force field, when the density of the solid phase is greater than that of the liquid phase, the solid phase is deposited on the inner wall of the bowl, and the screw conveyor and the bowl move the solid phase to the discharge under the set differential speed. When it enters the cone end of the bowl and reaches the discharge port, it leaves the overflow surface, the moisture content of the solid phase is further reduced, and is discharged to the discharge port. The liquid phase overflows from the overflow port at the big end of the bowl.
The overflow radius can be adjusted to suit different materials. The smaller the overflow radius, the higher the moisture content of the solid phase and the lower the solid content of the liquid phase (the liquid phase is clearer); the larger the overflow radius, the lower the moisture content of the solid phase and the lower the solid content of the liquid phase. High (more turbid liquid phase).
LWX horizontal decanter (centripetal pump liquid) centrifuge: the liquid discharge method is centripetal pump, and the liquid discharge radius is adjustable. The outlet liquid has a certain pressure and can be directly connected to the outlet pipeline.
LWXF horizontal decanter (explosion-proof) centrifuge: Before starting the centrifuge, the centrifuge inner cavity and the casing cavity are replaced with nitrogen, and the oxygen content concentration in the inner cavity is below the set safe concentration before it can be started. Nitrogen is added during operation. Nitrogen seals are installed at both ends of the centrifuge to ensure the isolation of the centrifuge cavity from the outside and meet explosion-proof requirements. The motor of the centrifuge and the electrical components on site must meet the explosion-proof grade of the working condition. The transmission belt is antistatic and has static grounding. In explosion-proof applications, centripetal pumps are generally used. The solid outlet of the centrifuge must be connected to the fan and other devices.
The settling velocity of the solid-liquid two-phase mixture is determined by the dispersion state of the suspended matter and the two-phase density, and is also significantly affected by the surface state of the solid-liquid two-phase, because it can affect the stability of the mixture and control the interaction between particles. state of contact. The properties of these systems may also be time dependent, as some suspensions have settling velocities that vary with time.
Settling velocity is the main basis for type selection. By analyzing and testing the physical and chemical properties of the solid-liquid mixture, determining the separation process, and conducting necessary technical and economic analysis (product quality, yield, energy consumption, production capacity, operation safety, control), select the appropriate separation equipment.
Generally, the sedimentation method is more economical than the filtration method, especially in those cases involving high-volume, continuous liquid flow, gravity settling is considered to be the first choice.
When the density difference between the solid-liquid two-phase is very small, try not to use the sedimentation method for solid-liquid two-phase separation. Or increase the density difference through appropriate process methods, or increase its separation power through the action of centrifugal force.
 

Centrifuge system
 

Conditions of use of the centrifuge
 

Conditions of use of the centrifuge	Parameter
Ambient temperature °C	-10~45; air relative humidity≯85%
Design temperature °C	-10~90
Design pressure mbar	100
Air source pressure bar	/
Washing fluid pressure bar	≥3
Main power	3-phase 5-wire system/50HZ/380V or according to local power supply
Nitrogen source pressure bar	3
Nitrogen purity	≥99.9%
Nitrogen flushing pressure (working condition) bar	3

Centrifuge Features
 

Characteristic	Standard configuration
Explosion-proof requirements	According to URS requirements
Feeding method	Longitudinal feed tube
Discharge method	Scraper + chute hopper or scraper + spiral hopper
Door cover form	Flat open cover or full open cover
Lock cover and open cover form	Hydraulic locking + manual opening or manual pressing
Support and bearing	Flat four-point support
Installation form	Overall installation or partition installation
Damping system	Spring + high viscosity liquid damping
Host driver	Inverter drive + belt drive
Scraper driving method	Hydraulic drive
Screw discharge drive mode	Motor + reducer
Scrape	Stratificationless or Quantitative Stratification
braking method	Resistance energy braking
Lubrication method	Grease lubrication or thin oil lubrication
System control method	PLC program control

Note: If nitrogen protection is configured, a nitrogen source is required

Features
 

Characteristic	Standard configuration
Explosion-proof requirements	According to URS requirements
Feeding method	Feed pipe with flushing branch
Discharge method	Scroll conveyor
Open form	Manual opening + constant force support
Support and bearing	Flat four-point support
Damping system	rubber shock absorber
Host driver	Inverter drive + belt drive
Differential drive	Inverter drive + planetary gear differential
Braking method	Resistance energy braking
Lubrication method	Thin oil lubrication or grease lubrication
System control method	PLC program control

Centrifuge technical parameters
 

Centrifuge Technical Parameters		LW220	LW350	LW450	LW530	LW650
Bowl inner diameter mm		220	350	450	530	650
Bowl effective length mm		880	1460	1800	2120/2650	2800
aspect ratio		4	4.17	4	4/5	4.3
Bowl speed r/min (max)		4800	4000	3200	2800/2500	2500
Separation factor G (max)		2840	3133	2578	2325/1853	2273
Differential ratio		1:29.5	1:43	1:43	1:32.5	1:32.5
Differential speed r/min		5-50 adjustable	10-30 adjustable	10-30 adjustable	10-30 adjustable	10-30 adjustable
Bowl cone angle°		2x8°	2x8°	2x8°	2x8°	2x10°
Main motor, inverter power kw		11	22	30	55	90
Back drive motor, inverter power kw		-	7.5	11	15	45
Machine weight Kg		1100	2100	3500	5000	11200
Dimensions LxWxH		2820x760x860	3500x1000x1000	4215x1090x1270	4728x1230x1420	5400x1750x1580
Dimensions of electric control box LxWxH		800x600x1500	800x600x2200
Lubrication station	System pressure Mpa	/	1
	Motor power kw	/	0.55
	Dimensions LxWxH	/	630x520x710
Noise level (1m away from the machine) dBA		80

Connection nozzle
 

Connection nozzle		LW220	LW350	LW450	LW530	LW650
Feed pipe		DN25	DN65	DN40	DN50	DN65
Inner chamber wash pipe		DN15	DN25	DN32	DN32	DN32
Case wash pipe		DN15	DN25	DN32	DN32	DN32
Solid outlet		Rectangular Flange 350x180	Rectangular Flange 450x300	Rectangular Flange 590x440	Rectangular Flange 680x440	Rectangular Flange 910x450
Liquid outlet		DN100	DN125(LWX DN32)	DN150(LWX DN40)	DN200(LWX DN50)	DN200(LWX DN65)
Solid outlet Viewport		Ø 159 Quick release	Ø 159 Quick release	Ø 219 Quick release	Ø 219 Quick release	Ø 219 Quick release
Thin oil lubrication	Oil port	/	M10
	oil return port	/	Ø25 hose connector
Grease lubrication	Grease port	M10x1 Grease nozzle
Gearbox oil port		M18x1.5 screw plug
Shaft seal nitrogen filling port		/	Ø16mm Air connector
Bowl inner chamber, casing nitrogen filling port		/	Ø16mm Air connector

Note 1: The discharge port (solid phase outlet) above is the standard factory configuration, and the external discharge port can be customized according to user requirements
Note 2: Flange according to HG/20615-2009 Class150 series
Note 3: There are two lubrication methods, thin oil lubrication and grease lubrication, which need to be specified when ordering

Outline drawing LW decanter centrifuge

LW bowl end cover

Gearbox

Solid outlet wear-resistant sleeve

Outline drawing of LWX centrifuge


LW decanter centrifuge installation form

The height H of the solid outlet is determined according to the actual conveying method
The centrifuge can be installed directly on the floor, and the discharge port is set on the floor, which can be connected to the lower silo or conveying device through a soft connection.
If it is installed on the bottom floor, it is necessary to set up the installation bracket and the centrifuge elevated so that the discharge port has a sufficient height from the ground for receiving the material. The specific height is determined according to the material receiving method.
For elevated installation, a safety fence should be provided around the centrifuge plate.
The pipe connections of the feed pipe, flushing pipe, liquid outlet pipe, and discharge port of the centrifuge should be connected by hoses.
For the installation requirements of the centrifuge, please refer to the relevant technical requirements of Tongze.