Pusher Centrifuges

Crown Machinery™ Pusher Centrifuges

A pusher centrifuge is a type of filtration technique that offers continuous operation to de-water and wash materials such as relatively in-compressible feed solids, free-draining crystalline, polymers and fibrous substances.

It consists of a constant speed rotor and is fixed to one of several baskets. This assembly is applied with centrifugal force that is generated mechanically for smaller units and hydraulically for larger units to enable separation.

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The advantages of Pusher Centrifuges

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Higher processing capacities

Pushers offer higher processing capacities than batch filtering centrifuges such as vertical basket and inverting filter.
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Best washing characteristics

Provides the best washing characteristics of any continuous centrifuge due to control of retention time and uniform cake bed.
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Gentle handling

Gentle handling makes pushers better suited for fragile crystals.

Description of our Pusher Centrifuges

A suspension feed enters the process to undergo pre-acceleration and distribution. The subsequent processes involve main filtration and intermediate de-watering, after which the main filtrate is collected. Wash liquid enters the washing step and final de-watering follows. Wash filtrate is extracted from these two stages. The final step involves discharge of solids which are then collected as the finished product. These process steps take place simultaneously in different parts of the centrifuge.

Pusher centrifuges are mainly used in chemical, pharmaceutical, food (mainly to produce sodium chloride as common salt) and mineral industries.

It is widely accepted due to its ease of modification, such as gas-tight and explosion protection configurations.

STL Series

STL Series is suitable for separating the suspension with solid particle size of more than 0.05mm and with the concentration of over 40%. It was widely used in chemical industry industry, fertilizer, manufacturing salt and alkali, especially suitable for the solid-liquid separation of ammonium bicarbonate, ammonium chloride, mirabilite, ammonium bicarbonate, sodium sulfate etc.

Two-Stage Pusher Centrifuge Specifications

Model STL400 STL500 STL630 STL800 STL1000
Basket Diameter (mm)

337/400

438/500
 560/630 720/800 920/1000
Lengh of Filtering area (mm)

145/155

180/180
 240/240 240/320 240/320
Speed (r/min)

500-2200

1200-2000
 1000-1800 800-1600 650-1250
Separating Factor

503-1083

402-1120
 350-1142 286-1145 236-875
Length of Pusher (mm)
40
50
 50 50 50
Frequency Of Pusher (L/min)

30-80

30-80
 30-80 30-80 20-70
Main Motor Power (KW)

11

30-45
 37-55 55-75 75-90
Oil Pump Motor Power (KW)

4

15
 30 37 45
Production Capacity (t/h)

1-8

5-15
 8-25 15-40 18-50
External dimensions LxWxH (mm)

2460*1286*1030

2750*1480*1290
 3690*1600*1265 3700*1800*1450 4200*1900*1900
Gross Weight (Kg)

2480

3100
 4100 7000 12000

Typical Industry Applications

Chemical

Pharmaceutical

Organic intermediates

  • Paraxylene,
  • Adipic acid,
  • Oxalic acid caprolactam,
  • Nitrocellulose,
  • Carboxymethylcellulose.

FOOD INDUSTRY

  • monosodium glutamate,
  • salt,
  • lysine and saccharin.

PLASTIC INDUSTRY

  • PVC
  • Polyethyleneand polypropylene
  • Resins

OTHER

  • Peel cotton testa