Disc filter is a paper pulping equipment of new generation. It is mainly used for white liquor recovery and pulp refining. Disc filter can save energy and water resources, reduce fiber loss, achieve environmental protection and avoid pollution. Disc filter is mainly used in the recycling of white liquor during the process of papermaking, and the pulp refining in the pulping process.

Disc filter we offer

CNBM disc filter can adjust the pulp density and processing capacity according to the customers' technical requirements. CNBM has advanced design software and mature technology. CNBM disc filter has a market share of over 70% in China.

Disc filter series and specifications:

Disc QTY	ZNH25	ZNH35	ZNH45	ZNH44
	Overall dimension L*W*H(mm)	Overall dimension L*W*H(mm)	Overall dimension L*W*H(mm)	Overall dimension L*W*H(mm)
4	3885*3035*4168
6	4485*3035*4168
8	5085*3035*4168	5510*4100*5361	6319*5450*6060
10	5685*3035*4168	6210*4100*5361	7019*5450*6060	7415*6400*7235
12	6285*3035*4168	6910*4100*5361	7719*5450*6060	8115*6400*7235
14	6885*3035*4168	7610*4100*5361	8419*5450*6060	8815*6400*7235
16		8310*4100*5361	9119*5450*6060	9515*6400*7235
18		9010*4100*5361	9819*5450*6060	10215*6400*7235
20				10915*6400*7235
22				11615*6400*7235
24				12315*6400*7235

 

Item	ZNH25	ZNH35	ZNH45	ZNH55
Model
Disc Dia. (mm)	2500	3500	4500	5500
Per-disc filtration area (m2)	8.5	16.7	26	38
Capacity	0.6-3M3/m3.h (white water recovery) 0.7-1.5t/m3.d (pulp thickened)
Fiber recovery rate (%)	>95
Filtrate clarity(mg/L)	20-80
Inlet consistency (%)	0.2-0.6(white water recovery) 0.5-1.2 (Pulp thickened)
Outlet consistency (%)	4-6(white water recovery) 4-15 (Pulp thickened)
MOC	SS304 material for parts in contact with product
Vacuum degree (Mpa)	0.02-0.06
Net washing water pressure (Mpa)	0.7
Stripping water pressure (Mpa)	0.7

Disc filter working principle

The white liquor enters the disc filter through the feeding box and distributes evenly throughout the tank. Under the action of gravity, the pulp layer (2-3mm) is formed on the fan. In order to ensure the optimal dewatering, the filtrate is discharged to the corresponding filtrate channel in the central axis through the fan with open grille.

The rotating shaft is connected to a filtrate valve that can switch the relevant vacuum channel. A vacuum is formed by the loss of atmospheric water. When the filtrate enters the filtrate valve, it is divided into turbid filtrate, clear filtrate and ultra clear filtrate.

When the fan body emerges from the suspension, the filtrate is expelled, and the pulp layer is dehydrated under vacuum. The pulp is stripped from the fan body by a spray pipe, which is then placed side by side into the discharge channel in the tank, and then to the spiral conveyor. The filter screen is washed clean by the vibrating water pipe before the next cycle begins.

Disc filter advantages

1. In the process of white liquor recovery, water recycling is realized and water consumption is reduced. The fiber recovery rate is high, eliminating waste and pollution when white liquor is discharged.
2. When the pulp is concentrated, the pulp concentration is high, which can reach 10-14%.
3. The filter plate features diversified structure, economical application, high strength, convenient replacement, large effective filtration area and good filtering effect.
4. The equipment model specification is complete, can change the filter area according to different production requirement.
5. Special wear-resistant material distribution plate, good sealing effect.
6. High degree of automation, easy to operate, reliable performance.
7. Compact structure, small footprint, large production capacity.
8. Good economic and social benefits.