Suction Self-Cleaning Filter

The Suction Self-Cleaning Filter is a highly efficient and automated liquid filtration device. Its core function is driven by differential pressure to cause the spiral movement of the suction pipe, utilizing negative pressure to adsorb impurities on the inner wall of the filter screen, thereby achieving automatic cleaning without interrupting water supply.

Applicable to various fields including industrial cooling water filtration, agricultural irrigation, and wastewater treatment.

I. Core Working Principle

Filtering Stage:

Water enters the filter through the intake, passing through the coarse and fine filter nets sequentially. The coarse filter captures larger particles to protect the fine filter from damage by large particles; the fine filter then further retains suspended matter and particles, and the purified water flows out through the outlet.

Impurity Accumulation: As the filtration progresses, an impurity layer gradually forms on the inner wall of the fine filter screen, resulting in a pressure difference between the inside and outside of the filter.

Self-cleaning phase:

When the differential pressure reaches the preset value (or upon reaching the scheduled cleaning time, or manual activation), the automatic cleaning function is initiated.

Waste Valve Opened: Under the action of the pressure difference, impurities on the filter mesh surface are suctioned into the waste pipe through the suction nozzle.

Spiral Cleaning: The motor drives the suction pipe to perform a spiral movement along the axial direction, while rotating the nozzle, ensuring the entire inner surface of the fine filter mesh is thoroughly cleaned.

Wastewater Shutdown: Following the cleaning cycle, the wastewater valve is closed, pipeline pressure is restored, and the filter is prepared for the next cycle.

Uninterrupted Water Supply: During the cleaning process, filtered pure water continuously flows out of the outlet, and the system does not require shutdown.

Section II: Equipment Structure and Components

Key Components:

Motor: Powers the movement of the suction pipe and nozzle.

The electrical control box integrates a differential pressure switch, a timer controller, and manual buttons for automatic or manual control.

Filter Components: Including coarse and fine filters, typically made of 304 or 316L stainless steel, known for their strong corrosion resistance.

Nozzles and Drain Valves: Nozzles are responsible for吸附impurities, while drain valves quickly expel waste.

Propeller shaft and frame: Support the filter screen and transmission components, ensuring stable operation of the equipment.

Structural Features:

Horizontal Cylinder Design: Equipped with coarse and fine filter chambers, optimizing the water flow path.

Sideways installation: Easy for maintenance and repair, operation possible without downtime.

Intelligent Control System: Equipped with a large, color Chinese LCD touch screen, it displays operating status in real-time and supports remote monitoring.

III. Technical Specifications and Performance

Filtering Precision:

Covering a range of 50-2000 micrometers, different precision filter meshes are available to meet your specific requirements.

***Filtering accuracy up to 30 microns, suitable for high-precision filtration applications (such as pretreatment for reverse osmosis)

Traffic and Pressure:

Flow Range: Varies by model, up to hundreds of tons per hour

Work Pressure: Typically 1.0 MPa, some models can withstand higher pressure.

Back pressure reduction: Low pressure drop during cleaning without affecting normal water supply.

Water Consumption & Time:

Low recoil water consumption (≤1%), cleaning time of 30-60 seconds, high efficiency.

Motor Power: Typically 0.37kW, with low energy consumption.

Section 4: Application Fields

Industrial Filtration:

Cooling Water Filtration: Protects equipment like cooling towers, rolling mills, continuous casting machines, etc., from impurity blockages.

Nozzles Protection: Prevents nozzle clogs in industries such as papermaking, plastics, and automotive.

Reclaimed and Side Stream Water Treatment: Used in circulating water systems for power plants, steel mills, chemical industries, and more.

Agricultural Irrigation:

High-Flow Water Source Filtration: Suitable for underground water, municipal water, river, lake, and sea irrigation scenarios

Orchards, nurseries, golf courses: Filter impurities, protect irrigation equipment, and enhance irrigation efficiency.

Wastewater Treatment:

Wastewater Tr三级 Treatment: As a pretreatment equipment, it reduces the subsequent treatment load.

Municipal Water Reuse: Converts wastewater into reusable water resources, saving water usage costs

V. Advantages and Features

High Automation: The cleaning process is controlled through differential pressure, time, or manually, without the need for human intervention.

The intelligent control system supports remote monitoring for convenient centralized management.

Thorough Cleaning

The spiral movement of the drain pipe combined with negative pressure adsorption thoroughly clears away impurities on the inner wall of the filter mesh.

Avoid filter clogging issues caused by the incomplete cleaning of traditional filters

Compact Structure:

Horizontal cylinder design saves space, suitable for limited installation sites

The modular installation facilitates maintenance and repair, reducing operation and maintenance costs.

Wide Application Range

Our systems can handle various water qualities, including those with high suspended solids and high viscosity impurities.

Adjustable filtration accuracy to meet the needs of various industries.

Section 6: Comparison with Other Filters

Compared to self-priming filters:

Self-priming filter: Relies on water pressure to draw impurities into the drain pipe, but cannot remove debris that is firmly attached to the filter mesh or blocks the passage; precision can only reach about 100 micrometers.

Suction Filter: It thoroughly removes impurities through spiral movement and negative pressure adsorption, achieving a precision of up to 30 microns, while ensuring the water supply is uninterrupted during the cleaning process. Compared to scraper filters:

Slat-type Filters: They can only remove impurities adhering to the inner side of the filter mesh during cleaning. They are ineffective against impurities blocking the passageways, and may even allow impurities to pass through the mesh, affecting the water quality of the output.

Suction Filter: Ensures thorough removal of impurities through spiral movement and negative pressure adsorption, resulting in stable water quality.

Section 7: Installation and Maintenance Recommendations

Installation Requirements:

The design incorporates a bypass layout, with valves installed on the inlet, outlet, and drain outlets (the drain valve should be a quick-acting valve).

The equipment can be installed horizontally or vertically, but it must be connected to the pipes in the direction of the inlet and outlet. When installed vertically, the inlet faces upward: when installed horizontally, the drain outlet faces downward.

Maintenance Recommendations:

Regularly inspect the filter status and promptly replace any damaged or clogged filters.

Clean waste pipes and nozzles to prevent debris buildup affecting cleaning efficiency.

Inspect motor and electrical control box operation to ensure normal automation functionality.