White Water Filtering Machine

Used for solid and liquid separation of white water in papermaking workshop,use of high flow rate, fine fliter and centrifugal force, to remove suspended matter which diameter is larger than the pore size of filter net, the treated white water can replace clean water and be used as washing water.

1.Filter Body

Usually meticulously manufactured from high-quality stainless steel or high-strength corrosion-resistant plastic. This material not only possesses outstanding chemical corrosion resistance, capable of withstanding the erosion of various chemicals in white water, but also has good mechanical strength and durability, able to maintain a stable structure and performance during long-term operation.

The shape and size of the filter body are elaborately designed to accommodate the demands of different scales of papermaking production lines. The internal space is rationally laid out to ensure that the white water can fully flow through the filtration area and achieve efficient solid-liquid separation.

2.Filter Screen

Utilizes high-precision metal filter screens, such as stainless steel wire screens, or synthetic fiber filter screens, such as polyester fiber filter screens. The pore sizes of these filter screens are extremely fine and uniform, capable of precisely intercepting suspended substances with diameters larger than the pore size of the filter screen while ensuring sufficient water flux.

The surface of the filter screen undergoes special treatments, such as electrodeposition, coating, or heat treatment, to enhance its wear resistance, corrosion resistance, and anti-clogging performance, prolonging the service life of the filter screen.

The installation method of the filter screen is firm and reliable, facilitating replacement and maintenance to ensure the continuous and efficient operation of the filter.

3.Drive Device

Comprises a high-performance motor and a precise transmission system. The motor is typically an AC variable frequency motor or a DC motor, capable of flexibly adjusting the rotational speed according to actual production needs, providing a stable and powerful power output.

The transmission system consists of components such as a reducer, coupling, and drive shaft, which can smoothly and accurately transfer the power of the motor to the filtration components, ensuring that the operating speed and filtration effect of the equipment reach the optimal state.

The drive device is also equipped with functions such as overload protection, speed regulation control, and operation monitoring to guarantee the safe and reliable operation of the equipment and realize intelligent operation and management.

4.Feed Inlet and Discharge Outlet

The feed inlet is reasonably designed, usually in the shape of a trumpet or funnel, and internally equipped with guide plates and flow equalization devices. This enables the papermaking white water to enter the filter evenly and smoothly, avoiding local impact and turbulence phenomena and ensuring the stability of the filtration process.

The position and shape of the discharge outlet are optimized to ensure that the treated white water can be discharged smoothly, reducing resistance and pressure loss. The discharge outlet may also be equipped with a flow regulating valve and water quality monitoring sensors for controlling the effluent flow and real-time monitoring of the effluent quality.

5.Centrifugal Device

If the white water filter is equipped with a centrifugal device, it usually consists of a high-speed rotating drum or rotor. During the rotation process, a strong centrifugal force is generated, causing the solid particles to rapidly gather towards the edge, thereby accelerating the speed of solid-liquid separation and improving the separation effect.

The rotational speed and radius of the centrifugal device are precisely calculated and designed to adapt to white water of different properties and concentrations. At the same time, its structure is compact and cooperates well with the filter body to ensure the stable and efficient operation of the entire equipment.

6.Control System

Composed of an electrical control cabinet, PLC controller, touch screen, and various sensors. The electrical control cabinet is installed with electrical components such as power switches, contactors, and relays, providing a stable power supply and electrical protection for the equipment.

The PLC controller is the core of the control system, which can automatically control the start, stop, speed regulation, backwashing, and other operations of the equipment according to the preset programs and the signals fed back by the sensors, realizing automated production.

The touch screen provides an intuitive and friendly human-machine interface. Operators can conveniently set the equipment operation parameters, view the operation status and fault information, and conduct manual intervention and operation.

Various sensors, such as pressure sensors, liquid level sensors, and turbidity sensors, monitor various parameters during the equipment operation in real-time, providing accurate data support for the control system to ensure the stable operation and filtration effect of the equipment.

7.Cleaning Device

To prevent the filter screen from clogging and ensure the long-term stability of the filtration effect, some white water filters are equipped with an automatic cleaning device. The cleaning device can adopt methods such as high-pressure water flushing, gas backblowing, or mechanical scraping to regularly or according to the clogging situation of the filter screen to clean the filter screen.

The working parameters and cleaning cycle of the cleaning device can be set and adjusted according to the actual situation to achieve the best cleaning effect and energy-saving effect.

1.Feeding

The white water containing a large amount of suspended substances generated during the papermaking process is conveyed to the feed inlet of the white water filter through pipelines and feed pumps. At the feed inlet, the white water undergoes preliminary flow equalization and buffering and enters the interior of the filter at a stable flow rate.

2.Filtration Process

The white water that enters the filter rapidly flows through the filter screen under the impetus of the high flow rate. Due to the pore size of the filter screen being smaller than the diameter of the suspended substances, the suspended substances are intercepted on the surface of the filter screen, forming a filter cake. The clear water passes through the pores of the filter screen and enters the effluent channel of the filter.

If the equipment is equipped with a centrifugal device, under the action of the centrifugal force, the solid particles will gather towards the edge of the filter screen more quickly, forming a denser filter cake, improving the filtration efficiency and filtration accuracy.

As the filtration process continues, the thickness of the filter cake gradually increases, and the filtration resistance also increases. At this time, the control system will start the backwashing or cleaning device according to the preset pressure difference or time interval to clean and regenerate the filter screen.

3.Discharge

The clear white water after filtration treatment is discharged from the discharge outlet and enters the subsequent reuse system or storage facility. The water quality of the discharged white water is significantly improved, and the content of suspended substances is greatly reduced. It can replace fresh water and be used for flushing, dilution, and other links in the papermaking process, achieving the recycling and conservation of water resources.

1.Efficient Separation

Utilizing the synergy of high flow rate and fine filter screen, it can quickly and effectively remove the suspended substances in the white water, enabling the treated white water to reach a high level of cleanliness and reuse standard.

The advanced centrifugal device (if available) further enhances the solid-liquid separation effect, improves the filtration efficiency and processing capacity, and can meet the demands of large-scale papermaking production lines.

2.Energy Saving

The optimized structural design and reasonable power configuration result in low energy consumption during the equipment operation. Simultaneously, the efficient filtration and reuse system reduces the demand for fresh water, thereby lowering the water resource consumption and energy cost throughout the papermaking process.

3.High Degree of Automation

Equipped with an advanced control system, it can realize the automatic operation, monitoring, and fault diagnosis of the equipment. Operators can easily set the operation parameters through the touch screen, and the equipment will automatically adjust the operation status according to the preset programs, significantly reducing the manual intervention and operation intensity and improving the production efficiency and stability.

4.Strong Adaptability

Capable of adapting to papermaking white water of different properties, concentrations, and flow rates. By adjusting parameters such as the pore size of the filter screen, the filtration speed, and the parameters of the centrifugal device, it can meet the solid-liquid separation requirements under various complex working conditions.

The equipment also has good resistance to shock and fluctuation, capable of maintaining stable performance in the case of water quality changes and flow fluctuations during the papermaking production process.

5.Convenient Maintenance

The structural design is reasonable, and each component is easy to disassemble and install, facilitating daily maintenance and upkeep. The replacement of the filter screen is simple and quick, and the cleaning device is highly effective, reducing the equipment downtime and maintenance cost.

6.Environmental Friendliness

Through the effective treatment and reuse of papermaking white water, the pollution of wastewater discharge to the environment is reduced, in line with environmental protection requirements and the concept of sustainable development.

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