Vacuum Drum Washer

vacuum drum washer
vacuum drum washer

CNBM Vacuum Drum Washer

  • Large yield per unit area
  • high vacuum degree stable and high-density feed;
  • increase effective filtration area.
  • improve effects of mixing washing.
  • guarantee stable operation and easy maintenance.
  • reduce power consumption.

Vacuum drum washer is a common pulp washing equipment for bleaching workshop and extraction of pulp like wood pulp, straw pulp and other types of pulp. Vacuum drum washer is the key technological equipment for paper industry to solve the problem of wastewater pollution and implement alkali recovery project.

Vacuum Drum Washer Functions

Vacuum drum washer is mainly composed of drum, tank, plane distribution valve, washing device, peel pulp device, net-washing equipment, transmissions and screw conveyor, etc. It can be used in the single or multi series. Once the drum turns a circle, drum washer can complete three processes including filtration, washing, and stripping of pulp.

To be more specific, the surface of washer drum is divided into several compartments, each compartment is connected with the corresponding compartment of valve seat through filtrate flow. Valve core divides whole drum surface into the empty zone, venting zone and peel pulp zone. The drum rotates in a tank containing pulp, pulp through the drain port and pass vacuum filtration area, peel pulp area and vending area. As a result of vacuum suction, the liquid in the pulp is pumped out of the filtrate flow path and the distribution valve. The pulp is adsorbed on the outer surface of the drum body and peeled off by the doctor blade to achieve the suction, stripping and exhausting processes of the pulp

principle of vacuum drum washer
principle of single machine
principle of drum waher
principle of unit

Vacuum Drum Washer Manufacturer – CNBM

As the leading vacuum drum washer manufacturer in China, we can provide advanced products. Compared to other kinds of washer, vacuum drum washer can produce pulp with low residual alkali and extraction rate of black liquor, which powerfully impelled the development of alkali recovery and control the pollution of papermaking black liquor. So that attains the discharge standards of wastewater, protect the environment, benefit the nation and people.

Vacuum drum washer applies for extracting black liquor from cooking pulp and concentrating after bleaching, specifications as following:

  • Single production capacity: wood pulp 100-600t / d, bamboo pulp 75-400t / d, wheat straw pulp 50-180t / d
  • Tandem washer production capacity (extraction of black liquor):
    Air-dried wheat straw pulp 1-1.5t/m2.d air-dried pulp 1.5-2t/m2.d air-dried wood pulp 3-4t/m2.d
  • Vacuum degree:  0.01-0.03MPa
  • Drum speed:  0.8-3r/min

Technical Parameters

Model /Item Drum length (mm) Drum Dia. (mm) Drum speed (rpm) Feed Consistency(%) Discharge Consistency

(%)

 

Capacity( black liquor extraction)(Kt/m2.d)

 

Straw /Bagasse pulp Bamboo pulp Wood pulp
AMXJ35 3200 3500 0.8~3 1.5~2.5 8~12 52.5~87.5 175~210 210~280
AMXJ40 3650 3500 0.8~3 1.5~2.5 8~12 60~100 200~240 240~320
AMXJ45 4100 3500 0.8~3 1.5~2.5 8~12 67.5~112 225~270 270~360
AMXJ50 4550 3500 0.8~3 1.5~2.5 8~12 75~125 250~300 300~400
AMXJ55 5000 3500 0.8~3 1.5~2.5 8~12 82~137.5 275~330 330~440
AMXJ60 5450 3500 0.8~3 1.5~2.5 8~12 90~150 300~360 360~480
AMXJ65 5200 4000 0.8~3 1.5~2.5 8~12 98~162.5 325~390 390~520
AMXJ70 5600 4000 0.8~3 1.5~2.5 8~12 105~175 350~420 420~560
AMXJ75 6000 4000 0.8~3 1.5~2.5 8~12 113~187.5 375~450 450~600
AMXJ80 6400 4000 0.8~3 1.5~2.5 8~12 120~200 400~480 480~640
AMXJ85 6800 4000 0.8~3 1.5~2.5 8~12 127~212.5 425~510 510~680
AMXJ90 7200 4000 0.8~3 1.5~2.5 8~12 135~225 450~540 540~720
AMXJ95 7600 4000 0.8~3 1.5~2.5 8~12 143~237.5 475~570 570~760
AMXJ100 8000 4000 0.8~3 1.5~2.5 8~12 150~250 500~600 600~800
AMXJ105 7450 4500 0.8~3 1.5~2.5 8~12 157~262.5 252~630 630~840
AMXJ110 7800 4500 0.8~3 1.5~2.5 8~12 165~275 550~660 660~880
AMXJ115 8150 4500 0.8~3 1.5~2.5 8~12 173~287.5 575~690 690~920
AMXJ120 8500 4500 0.8~3 1.5~2.5 8~12 180~300 600~720 720~960

Single machine parameter

drum washer
single machine
Models ZXIV20 parameter
filter area m2 20
Feeding pulp concentration % 1.0-2.0
Outlet pulp concentration % 8~12
Drum specification mm Ф3000×2300㎜
capacity adt/d 106adt/d dissolving pulp(bleached)
power KW 11(virable-frequency ac motor )
Broken Helix Ф500×2300
 screw motor power KW 5.5
Spiral Speed r/min 88
fan delivery m3/h 2000
fan discharge pressure pa 1960
Power for motor of fan kw 2.2

Unit parameter

vacuum drum washer
unit
Models ZXIV20 parameter
filter area m2 20
Feeding pulp concentration % 1.0-2.0
Outlet pulp concentration % 8~12
Drum specification mm Ф3000×2300㎜
capacity adt/d 106adt/d dissolving pulp(bleached)
power KW 11(virable-frequency ac motor )
Broken Helix Ф500×2300
 screw motor power KW 5.5
Spiral Speed r/min 88
material clamping device specifications Ф500×2800
material clamping device power KW 5.5
material clamping device speed r/min 60
stirrer device specifications Ф500×2800
stirrer device power KW 7.5
stirrer device speed r/min 88
fan delivery m3/h 2000
fan discharge pressure pa 1960
Power for motor of fan kw 2.2

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