What is a vibrating dewatering screen?
Vibration dewatering screen is a screening equipment used for material
dewatering and media removal, commonly used for wet material processing in
industries such as ore, coal, sand and gravel, metallurgy, and chemical
engineering. Its main function is to accelerate the removal of moisture through
vibration, so that the material can reach a lower moisture content, thereby
improving the efficiency of subsequent processing or reducing transportation and
storage costs.
1、 Working principle
The working principle of the vibrating dewatering screen is based on the
principles of "vibration separation" and "liquid removal". The specific process
is as follows:
Vibration generation:
The exciter of the vibrating dewatering screen drives the screen mesh with a
motor or eccentric wheel to generate high-frequency vibration, causing the
material to vibrate strongly up and down on the screen surface.
Material particle stratification:
Due to the effect of vibration, material particles bounce on the surface of
the sieve. Larger particles are often blocked by the sieve layer, while smaller
particles pass through the pores of the sieve.
Moisture removal:
Under the action of vibration, the moisture on the surface of the water
containing material gradually penetrates and is discharged, flowing out from the
bottom of the sieve. Through this method, the moisture in the material is
effectively eliminated, achieving dehydration effect.
Material separation:
By using sieves with different aperture sizes, materials can be classified
into different particle levels, with larger particles being intercepted and
smaller particles smoothly flowing out through the sieve.
2、 Main components
The main components of a vibrating dewatering screen include:
Screen frame:
The screen frame is the supporting structure of the dewatering screen, used
to carry components such as the sieve mesh and exciter. The sieve frame is
generally made of steel or other wear-resistant materials.
screen mesh:
The sieve is the core part of the dewatering sieve, which aims to sort
materials into different particle sizes and allow moisture to flow out from the
pores of the sieve. The mesh size may vary depending on the material.
Exciter:
The exciter generates high-frequency vibration through a motor and an
eccentric wheel or vibration motor, providing vibration force for the dewatering
screen. Common exciters include eccentric wheels, vibration motors, etc.
Support system:
The support system usually uses springs or rubber shock absorbers to support
and reduce vibration, ensuring stable operation of the equipment and reducing
the impact of vibration on the equipment and foundation.
Drainage system:
The drainage system is used to remove moisture from materials, usually
through the drainage outlet or pipeline at the bottom of the sieve.
3、 Application fields of vibrating dewatering screen
Vibration dewatering screens are widely used in various industrial fields,
especially in the treatment of wet materials. The main application areas
include:
Mining industry:
In processes such as ore beneficiation and tailings treatment, vibrating
dewatering screens are used to remove excess moisture from materials, especially
in mining industries such as coal mines, iron mines, and copper mines.
Coal industry:
During the coal washing process, vibrating dewatering screens can effectively
remove moisture from coal, improve its dryness, and facilitate subsequent
transportation and storage.
Building materials industry:
Used for dewatering of sand and gravel materials, especially for the
treatment of wet materials or mud, it can reduce the impact of moisture and
ensure the quality of sand and gravel materials.
Chemical industry:
In the separation process of chemical raw materials, a vibrating dewatering
screen is used to remove chemical materials with high humidity, preventing the
material from affecting subsequent processing due to excessive moisture.
Metallurgical industry:
In the process of metallurgical mineral processing, vibrating dewatering
screens are used to remove moisture from mineral materials and improve their
dryness.
Environmental Protection Industry:
Used for dewatering sediment in wastewater treatment, assisting in the
treatment of wet materials such as sludge, and reducing the solid impurity
content in wastewater.
4、 Advantages and disadvantages of vibrating dewatering screen
advantage:
Efficient dehydration:
Through strong vibration, the moisture in the material can be quickly
expelled, achieving a good dehydration effect.
High screening accuracy:
The vibrating dewatering screen can accurately classify materials, ensure the
sorting of different particle materials, and improve production efficiency.
Strong applicability:
Suitable for dehydration of various wet materials, especially in industries
such as ore and coal, with significant application effects.
Simple structure:
The vibrating dewatering screen has a simple structure, easy installation,
maintenance and upkeep, and low operating costs.
Reduce material loss:
Due to the high precision of the vibrating screen mesh, it can effectively
reduce the loss of finer materials and ensure the recovery rate of
materials.
Disadvantages:
High energy consumption:
The vibrating dewatering screen requires significant power and frequent
vibration during operation, resulting in relatively high energy consumption.
Sensitive to material humidity:
For materials with high moisture content, there may be a risk of screen
clogging, leading to a decrease in screening efficiency.
Large footprint:
Compared with other dehydration equipment, vibrating dehydration screens
require a larger footprint and are suitable for large-scale production.
High maintenance costs:
During the operation of the vibrating screen, there is significant vibration,
which causes severe wear and tear on the equipment. Regular maintenance and
replacement of parts are required.
5、 Maintenance and upkeep of vibrating dewatering screen
Regularly check the sieve mesh:
The screen mesh is the core part of the vibrating dewatering screen and needs
to be regularly inspected for wear, damage, or blockage to ensure the screening
effect.
Check the exciter and motor:
The exciter and motor need to be regularly inspected to ensure their stable
operation and prevent production interruptions caused by malfunctions.
Check the drainage system:
Ensure that the drainage system is unobstructed to avoid poor discharge of
moisture in the materials, which may affect the dewatering effect.
Cleaning equipment:
During the operation of the vibrating dewatering screen, some materials may
accumulate, and it is necessary to regularly clean the equipment to prevent
material accumulation and blockage.
Lubrication and maintenance:
The vibrating and moving parts in the equipment should be lubricated
regularly to reduce friction and extend the service life of the equipment.
6、 Summary
Vibration dewatering screen is an efficient and economical dewatering
equipment widely used in industries such as mining, coal, and building
materials. Through strong vibration, the moisture in the material can be quickly
removed, achieving good dehydration effect. Although vibrating dewatering
screens have high energy consumption and footprint, their efficient dewatering
capacity and screening accuracy make them play an important role in many wet
material processing processes. Proper maintenance and upkeep can ensure the
long-term stable operation of equipment and improve production efficiency.