What is a high-pressure diaphragm frame filter press?
High pressure diaphragm plate and frame filter press is a commonly used
filtration equipment for solid-liquid separation, mainly used for liquid solid
separation in industries such as mining, chemical, pharmaceutical, food, and
environmental protection. This device applies pressure to push liquids
containing solid particles (such as slurry, sewage, etc.) into the filter
chamber, thereby achieving the removal of solid particles. The high-pressure
diaphragm plate and frame filter press is an upgraded version of the plate and
frame filter press, which adopts diaphragm plate technology to further improve
the dehydration efficiency of the filter cake, reduce liquid residue during the
filtration process, and have higher filtration accuracy and stronger processing
capacity.
1、 Working principle
The working principle of a high-pressure diaphragm frame filter press can be
divided into several main steps:
Feed:
The liquid containing solid particles enters the filter chamber through the
feed inlet and is distributed onto the filter cloth between each filter plate
and frame.
Filter press:
During the pressure filtration process, the filter plate and filter frame are
compressed by a hydraulic system to form a filter chamber. Liquid is filtered
through a filter cloth under high pressure, and solid particles are trapped on
the filter cloth to form a filter cake.
The magnitude of pressure depends on the properties of the filtrate and
separation requirements, and is usually regulated through a hydraulic
system.
Diaphragm pressing:
The high-pressure diaphragm plate is different from traditional filter plates
in that it is equipped with an elastic membrane layer during the filtration
process. When pressure is applied, the diaphragm plate will expand, further
squeezing the filter cake through the expansion effect of the membrane,
squeezing out the liquid inside, and further improving the dehydration degree of
the filter cake.
Slag discharge:
As the filtration and pressing process is completed, the filter cake
gradually accumulates into the filter frame. When the filter cake reaches a
certain thickness, the mechanical device will separate the filter plate from the
filter frame and discharge the dehydrated filter cake. Then, the machine will
restart the next cycle of filtering.
clean:
After the filtration cycle is completed, the equipment needs to be cleaned
regularly to avoid clogging and ensure the cleanliness of the filter cloth.
Cleaning methods such as high-pressure water washing and air blowing can be used
to remove residues on filter cloth.
2、 Main features
High pressure dehydration:
The design of the diaphragm plate can further press the moisture in the
filter cake under high pressure, usually reducing the moisture content of the
filter cake to a lower level and achieving better dehydration effect.
High filtering accuracy:
The high-pressure diaphragm plate frame filter press adopts high-precision
filter cloth and filtration system, which can achieve high-precision
solid-liquid separation and remove smaller solid particles.
High degree of automation:
Modern high-pressure diaphragm frame filter presses are usually equipped with
automated control systems, which can achieve automatic feeding, automatic
pressure filtration, automatic slag discharge and other operations, reducing
manual intervention and improving production efficiency.
Energy saving and efficient:
High pressure systems can complete a large number of filtration tasks in a
relatively short period of time, and further improve the recovery rate of
liquids and reduce energy consumption through diaphragm pressing.
Strong adaptability:
Suitable for suspensions of various properties, especially in industries such
as mining, chemical, and environmental protection where high solid content
slurries and wastewater are treated, it has good adaptability.
Easy to operate:
The operation of the high-pressure diaphragm frame filter press is relatively
simple, and the pressure can be quickly adjusted through the hydraulic system.
The operator only needs to perform simple settings and monitoring.
3、 Main application areas
High pressure diaphragm frame filter press is widely used in the following
fields:
Mining beneficiation:
In mining beneficiation, especially when dealing with fine particles in
slurry, high-pressure diaphragm plate frame filter press can effectively remove
moisture from the slurry, improve the recovery rate of slag, and reduce
environmental pollution.
Chemical industry:
In the process of chemical production, many chemical reactions generate waste
liquids containing solid particles. High pressure diaphragm plate and frame
filter presses can be used to filter these waste liquids and separate solids
from liquids.
Wastewater treatment:
In the process of urban sewage treatment and industrial wastewater treatment,
the high-pressure diaphragm frame filter press can effectively remove suspended
solids, oil-water separation, etc., helping water treatment plants improve
sludge dewatering efficiency and reduce sludge volume.
Food and beverage industry:
Used for processing fruit and vegetable juices, wastewater generated in food
processing, and solid-liquid separation in oil extraction.
Pharmaceutical industry:
In the process of drug production, high-pressure diaphragm plate and frame
filter press is used to separate residues and solvents in drugs, ensuring the
purity and quality of drugs.
Pulp and paper industry:
Used for treating pulp wastewater and waste liquid, it can effectively
separate solids and moisture in wastewater, and improve resource recovery
rate.
Metal smelting:
In the process of metal smelting, many smelting processes generate a large
amount of wastewater and solid waste. High pressure diaphragm plate and frame
filter presses can efficiently remove these waste materials for solid-liquid
separation.
4、 Advantages and disadvantages
advantage:
Good dehydration effect:
The diaphragm pressing function reduces the moisture content of the filter
cake, enabling more efficient recovery of liquids and improving product
purity.
High separation accuracy:
It can filter solids with smaller particles, achieve high separation
accuracy, and adapt to various complex suspension separations.
Automated operation:
Most modern devices are equipped with automated control systems, which are
easy to operate and operate stably.
Energy conservation and environmental protection:
High pressure dehydration can reduce energy consumption, improve liquid
recovery rate, and reduce pollution.
Strong processing ability:
The equipment is capable of handling materials with high flow rates and is
suitable for large-scale production.
Disadvantages:
High equipment cost:
Compared to traditional filter presses, high-pressure diaphragm plate and
frame filter presses require higher initial investment.
The operation process is complex:
The high-voltage system requires precise operation and adjustment, and
requires professional operators for maintenance.
Frequent replacement of filter cloth:
The filter cloth may experience significant wear and tear during prolonged
high-pressure filtration, requiring regular replacement and increasing
maintenance costs.
Large footprint:
Due to the size and working principle of the equipment, the overall footprint
is relatively large, which may require a more spacious production site.
5、 Summary
High pressure diaphragm plate and frame filter press is an efficient
solid-liquid separation equipment widely used in industries such as mining,
chemical, and environmental protection. It has high dehydration rate, high
separation accuracy, and strong adaptability. By using diaphragm pressing
technology, the dehydration efficiency of the filter cake can be significantly
improved, liquid residue can be reduced, and more resources can be recovered.
Despite its high equipment cost and complex operation, it is still an ideal
choice for industrial production that requires efficient filtration.