The purpose of pulp dewatering in stock preparation is to separate solids from pulp slurry.
Dewatering is a process used to separate a suspension (a mixture of solids and liquids) into two parts: a thickened, more concentrated part and a filtrate (liquid) part with fewer solids. In this process, a filter is used to divide the suspension, which has an initial consistency (cI).
Various types of machines are used for dewatering in stock preparation: drum filters, belt filters, twin-wire presses, disk filters, and screw presses, as well as static filters such as inclined and curved screens.
Screw presses have a housing, screens with round holes or slots, and a screw that turns. The screw moves the stock to the outlet, removing the of water as it turns. During transport, the free space between the screw body and the screen basket gets smaller in the axial direction. This means that the dewatering pressure increases.
Reduction in the free volume can be achieved by decreasing the screw pitch angle and increasing the screw rotor shaft diameter.
As the filter mat is continuously removed from the screen cylinder high stock consistency and dewatering capacity are achieved. On the other hand, the filtrate consistency is highest compared to all other dewatering methods. Outlet consistency is a direct function of the applied torque. Automatic torque control regulates the screw speed to keep discharge consistency high and constant. Screw presses are also used for dewatering in reject handling systems.
The Poly disc filter is crucial in pulp dewatering as it enhances filtration efficiency and reduces water consumption, leading to energy savings and a more sustainable papermaking process.
Parason pulp dewatering solutions offer you the latest upgraded tools and equipment that ease the task of drying. Our screw press machine are very productive and yield more in less time.
The complete system developed by Parason is very efficient and reliable. The air enters the bottom cylinder and circulates continuously which causes the air to heat. This hot air goes into the heat recovery sector.
The heat in the humid exhaust is mainly used to heat the additional air that is delivered to the dryer. Very few parts of the set-up are movable which makes it efficient in working and causes less maintenance.
The main purpose of Parason pulp dewatering equipment is to handle the rejects in a cost-effective way. The pulp dewatering system removes the water from the solid. This impacts on the reduced weight and volume of the pulp and helps to gain strong fibres.
Parason is a well-established pulp and paper machine manufacturing industry. Our machine and equipment are built with our highly skilled engineers with advance technology and features. There are several parts and equipment that contribute to the working of a paper machine.
Fibre Dewatering machine is also a part of the process that is equivalently important. The pulp dewatering machine price in India and in the international market differs as per the specification, capacity, operational mode, etc. of the equipment.