The principle of paper machine dewatering equipment

Publish Time:

2025-04-29 13:38

The principles of papermaking dewatering equipment mainly include two main types: screw press dewatering machines and vacuum suction boxes.

Screw Press Dewatering Machine
A screw press dewatering machine is a highly efficient solid-liquid separation device widely used in municipal wastewater treatment projects and in the petrochemical, light industry, chemical fiber, papermaking, pharmaceutical, and leather industries. Its working principle is based on the screw pressing principle. Changes in the screw diameter and pitch generate strong squeezing pressure, combined with the small gap between the moving and fixed rings, to achieve sludge squeezing and dewatering. During operation, sludge enters the filter cylinder from the inlet and is pushed towards the discharge port by the helical shaft blades. As the pitch between the helical shaft blades gradually decreases, the pressure on the sludge increases, and dewatering begins, with water flowing out from the gap between the stationary and moving rings. The self-cleaning function between the moving and stationary rings prevents clogging, ensuring continuous and stable operation of the equipment and improving dewatering efficiency.

Vacuum Suction Box
Vacuum suction boxes are used for dewatering in the papermaking process. Their principle is based on the suction of a vacuum pump, creating a high-pressure difference on the top and bottom of the paper to achieve forced dewatering of the wet paper. When the mesh passes through the vacuum suction box, water is drawn out, and air is also drawn in. The number and vacuum degree of vacuum suction boxes need to be adjusted according to the type of paper and the papermaking speed to ensure efficient dewatering.

What are the methods for cleaning papermaking felts?

In April 2015, the company successfully listed on the National Equities Exchange and Quotations (NEEQ)

The cleaning methods for papermaking felts mainly include three methods: hand washing, machine washing, and dry cleaning.

The principle of paper machine dewatering equipment

The principles of paper machine dewatering equipment mainly include two major types: screw press dewatering machines and vacuum boxes.

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