What's The Application of Belt Press Filter Mesh in Paper Pulp Making?

How Does The Belt Press Filter Change The Washing and Pressing Process from Fiber to Paper?

On the production line of the paper industry, there is a process that is often overlooked but determines the cleanliness of pulp, production energy consumption, and final paper quality.

It is like the "lung clearing" of the papermaking system, efficiently removing black liquor, fine fibers, and impurities from the pulp while maintaining a suitable pulp concentration.

One of the core components that truly drives the efficient operation of this process is polyester filter mesh.

On the belt press filter, they are not only a layer of "filter medium", but also the performance boundary of the entire equipment: efficiency, stability, solid content of filter cake, and production cost are all closely related to it.

Why Can't The Paper Industry Do without Belt Press Filter Mesh?

The pulp system in the papermaking industry is mainly composed of fibers, which are mixed with impurities such as bleaching residue, fillers, microfibers, colloids, etc.

Relying solely on natural sedimentation is almost impossible to achieve solid-liquid separation, and although traditional disc filtration and vacuum washing are popular, they gradually cannot keep up with the pace of modern paper production lines in terms of concentration stability and pressing efficiency.

The Belt Press Filter has just filled the gap in this stage:

1.Continuous operation, high production capacity

2.Controllable pressure zoning, high dehydration efficiency

3.Stable slurry flow state, suitable for large-scale industrial pulp washing

4.Low energy consumption, can replace the usage of some traditional water/cooking systems

5.But what truly makes the belt press filter machine valuable is the "filter mesh" on its surface.

The Function of Polyester Filter Mesh for Belt Press Filter

During the operation of the pulp through the filter belt, the filter mesh undertakes three key tasks:

Filtering and Interception

The structure of the filter mesh determines whether the fibers in the pulp can be effectively intercepted, as well as the discharge speed of black liquor and impurities.

Over dense will block, over sparse will leak, and the filter mesh must find a delicate balance between "passing" and "intercepting".

Transport and Support Filter Cake

Washing and pressing pulp is a continuous mechanical pressing process, and the filter mesh must withstand high tension, repeated bending, and walking under pressure for a long time.

It is both a filtering medium and a conveyor belt.

Regenerative Ability

Pulp is sticky and easy to clog, especially after bleaching, the pulp contains fine fibers and colloids.

Whether the filter mesh is easy to clean and whether the cycle is long enough directly affects whether the entire production line can operate stably.

Application of Belt Press Filter Mesh

In paper mills, belt press filters are used in multiple critical processes, such as:

Bleach Washing

The filter mesh needs to handle a large amount of high viscosity black liquor while maintaining high permeability.

Washing of Regenerated Fibers (Waste Paper Pulp)

There are many impurities and fine particles in the slurry, which require high anti clogging performance of the filter mesh.

Dehydration of Chemical Pulp and Semi Chemical Pulp

The coarse and fine fibers of the pulp are mixed, and the filter cloth needs to have both support and retention capabilities.

Treatment of Gypsum and Filler by-products

The dewatering system used in the environmental protection section requires the filter cloth to maintain stable industrial strength.