Against the backdrop of the continuous promotion of green development in the paper industry, the
integrated sewage treatment project of a certain paper mill serves as a typical representative of
efficient resource utilization. The effectiveness of sewage treatment directly affects the sustainability
and compliance of project operation, and the performance and stability of filtration equipment
become important support for ensuring the long-term operation of the system.
Brush self-cleaning filters, as an efficient and stable pretreatment equipment, are gradually playing
a core role in the treatment of papermaking wastewater.
01 Working principle
Brush self-cleaning filter is an intelligent filtering device that integrates mechanical brushing and
pressure difference control. The core lies in the organic combination of the rotating brush system
and high-precision filter screen to achieve efficient interception and automatic cleaning of
suspended particles in wastewater, suitable for working environments with high fiber content and
complex impurities in papermaking wastewater.
During the operation of the equipment, the water to be treated enters the interior of the filter through
the inlet, solid particles are intercepted by the filter screen, and clean liquid is output through the filter
screen. As the filtration process progresses, impurities gradually accumulate. When the pressure
difference between the inlet and outlet water reaches the preset threshold, the control system
automatically starts the driving motor, which drives the inner brush of the filter screen to rotate and
remove the attached dirt. At the same time, the drain valve briefly opens to discharge the dirt from
the system. The entire process is fully automated and does not affect normal filtering, completing
continuous self-cleaning.
02 Four major characteristics
（1） Continuous filtration, stable operation
During the cleaning process, there is no need to stop the machine, ensuring the continuous and
stable operation of the system, which is particularly suitable for the long-term operation needs
of paper production lines.
（2） Intelligent adjustment, efficient cleaning
Based on the pressure difference signal triggering the cleaning mechanism, the cleaning frequency
can be automatically adjusted according to changes in water quality, effectively avoiding problems
of excessive cleaning or incomplete cleaning.
（3） Reliable structure, durable and long-lasting
The key components are made of corrosion-resistant and wear-resistant materials, which can adapt
to the harsh working conditions of complex chemical composition and high fiber content in
papermaking wastewater.
（4） Easy maintenance and economical operation
High degree of automation, small daily maintenance workload, and effective control of long-term
operating costs.
03 Technology integration and system adaptability
This device integrates mechanical design, automatic control, and fluid handling technology, equipped
with an intelligent electronic control system, and supports remote monitoring and operation. The
modular structure design makes installation and expansion more flexible, suitable for new projects,
facilitates the transformation and upgrading of existing systems, and helps paper companies achieve
energy conservation, consumption reduction, and refined management in the sewage treatment
process.
With the increasing demand for environmental compliance, energy efficiency improvement, and
intelligent operation in the paper industry, brush self-cleaning filters are gradually becoming a
solution for wastewater pretreatment due to their high efficiency, reliability, and intelligent
technical characteristics.
In the development path of industrial green transformation, such equipment will continue to provide
technical support for papermaking projects, helping enterprises achieve clean production and
resource recycling goals.
