Single Screw Press

single screw press
single screw press

CNBM’s Single Screw Press

  • apply for making  straw pulp, wood, etc.
  • prevent  smell, black liquior overflow.
  • high dewatering rate, high pulp drying.
  • high pulp concentration, low power consumption
  • low rotary speed,  no noise.

Single screw press is the squeeze pulp equipment that is used for paper pulp dehydration. In general, single screw press is mostly designed for black liquor of wood pulp, bamboo pulp, wheat straw pulp after cooking and high effective concentration of waste paper pulp. Single screw press is mainly applied for black liquor extraction in the large-scale pulp mill. It is installed in the spray storage and squeezes the black liquor from the pulp depend on the variational diameter-pitch screw, finally black liquor from the filter box to the black liquor tank.

Single screw press structure

In principle, after being cooked, the pulp is injected into single screw press. Then, the water and black liquor are separated from the pulp by squeezing, so as to achieve the purpose of black liquor extraction. Meantime, due to the squeezing of pulp actually produces the result of impressafining.


Composition of single screw press

Single screw press has many parts including feeding bearing, screw shaft, main bearing, filter drum, intermediate support, reel, feed port, foot section, a discharge port, rack, hood, air cylinder, loading plug, transmission and etc.

The main part of single screw press as below:

  • Transmission: variable-frequency drive, motor, retarder, coupling, and etc. The speed of the spindle can be adjusted by the variable-frequency drive. When the speed of the screw shaft is increased, the production capacity of the equipment can be improved. When the speed of the screw shaft is reduced, the dryness of the exporting material can be improved.
  • Screw shaft: at first, the pulp is connecting with a screw conveyor. In the middle part, screw shaft increases the compression ratio, ratio of filtrate extraction and dryness of pulp. Finally, the latter part is a high-pressure screw, from the feed port to discharge port, screw pitch of screw blade are ordered from small to big.
  • Sieve drum: It includes inlet section, the pre-filter section, the filter section, the compression section, and the outlet section and so on. The inner layer of the sieve drum is the mesh, which is made of stainless steel plate, the aperture from the inlet to the discharge port are arranged from small to large.

Single screw press Manufacturer in China – CNBM

Single screw press from CNBM can effectively handle pulp with a variety of feeding concentration. Concentrated paper pulp has uniform dryness and stable pulp production rate. The pulp passed the single screw press, fibers are rarely affected, no clogging, no skid design to reduce the wear and corrosion of the screw. The device can also be used to concentrate the finished pulp and sell it directly as a commercial pulp.

single screw press
single screw press projects


Note :Based on kraft wood pulp


Model/Specification AMDL-I 600 AMDL-I 750 AMDL-I 1000 AMDL-I 1100 AMDL-I 1200 AMDL-I 1500
Screw Dia.(mm) 600 750 1000 1100 1200 1500
Production (Kt/d) 40-50 50-70 100-120 120-140 140-160 180-200
Power (KW) 37 45 55 75 90 132
Net Weight (Kg) 14000 16000 19000 21000 24000 32000
Inlet Consistency(%) 8~12 8~12 8~12 8~12 8~12 8~12
Outlet Consistency (%) 25~35 25~35 25~35 25~35 25~35 25~35



Note :Based on kraft wood pulp 


Model/Specification AMDL-I 600 AMDL-I 750 AMDL-I 1000 AMDL-I 1500
Screw Dia.(mm) 600 750 1000 1500
Production (Kt/d) 50-100 100-120 200-350 500-700
Power (KW) 90 160 315 500
Net Weight (Kg) 9200 12500 19000 38000
Inlet Consistency(%) 4~12 4~12 4~12 4~12
Outlet Consistency (%) 25~30 25~30 25~30 25~30

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