Innovatively adopting the scraper - type automatic cleaning technology, it efficiently removes impurities on the filter screen, ensuring the continuous and stable operation of the filtration system, and providing excellent solutions for various industrial and civil water treatment scenarios.

I. Product Introduction

The scraper self - cleaning filter is an advanced water treatment device that integrates high - efficiency filtration and intelligent self - cleaning functions. The core filtration component inside the device is a stainless - steel filter screen. After the water to be treated enters the filter through the inlet, it flows from the outside to the inside of the screen under pressure. Suspended solids, colloids, rust, sediment and other impurities in the water are intercepted on the surface of the screen. When the impurities intercepted by the screen cause the pressure difference between the inlet and the outlet to reach the preset value (usually 0.05 - 0.1MPa), or the running time reaches the set duration (such as 8 - 24 hours), the device automatically starts the cleaning program. The motor drives the scraper to rotate closely against the surface of the screen, scraping off the attached impurities. At the same time, the drain valve opens, and the impurities are discharged with the water flow. There is no need for frequent manual disassembly and cleaning, which effectively improves the filtration efficiency and the service life of the device. It is widely used in many fields such as industrial circulating water, sewage treatment, food and beverage production.

II. Working Process

1. Normal Filtration Stage

• Raw Water Inflow: Driven by the water pump, the raw water enters the device from the filter inlet through the pipeline and is evenly distributed to the outside of the screen, ready for filtration.

• Impurity Interception: The water flows from the outside to the inside of the screen. During this process, suspended solids, colloids, rust, sediment and other impurities in the water with a particle size larger than the pore size of the screen are intercepted on the surface of the screen. The purified water is collected through the inside of the screen and transported to the subsequent water - using links.

2. Cleaning Trigger

• Pressure Difference Trigger: As the filtration continues, impurities on the surface of the screen accumulate continuously, causing the pressure difference between the inlet and the outlet of the filter to gradually rise. When the pressure difference reaches the preset value (generally 0.05 - 0.1MPa), the system automatically starts the cleaning program.

• Time Trigger: If the raw water quality is good and the pressure difference does not increase significantly, when the device running time reaches the preset duration (such as 8 - 24 hours), the cleaning program will also be automatically started to ensure that the screen is cleaned in time and the stable filtration performance is maintained.

3. Self - Cleaning Process

• Scraper Rotation and Scraping: The motor starts and drives the scraper to move in a circular motion along the inner wall of the screen. The scraper closely adheres to the surface of the screen and scrapes off the impurities attached to the pores and surface of the screen.

• Impurity Discharge: At the same time, the drain valve opens. Under the pressure of the water flow, the scraped impurities are discharged from the filter through the drain port. The entire cleaning process usually only takes 30 - 120 seconds.

4. Restoring Filtration Stage: After the cleaning is completed, the drain valve closes and the scraper stops rotating. The device quickly resumes the normal filtration state, continuing to provide stable purification protection for subsequent water use.

III. Product Features

Key Advantages	Description
Efficient Automatic Cleaning	Equipped with an intelligent control system, it precisely triggers the cleaning program through dual monitoring of pressure difference and time. The scraper efficiently removes impurities, realizing fully automatic cleaning and greatly reducing manual maintenance costs.
Excellent Filtration Performance	Using high - precision stainless - steel screens, the filtration precision ranges from 20 - 3000 microns, which can flexibly adapt to different water quality requirements. The interception rate of impurities is as high as over 99%, and the effluent water quality is stable and reliable.
Water - saving and Energy - saving Design	The water consumption for a single cleaning is only 0.5 - 1% of the treated water volume, significantly reducing water waste. The optimized hydrodynamic design reduces water flow resistance and lowers the operating energy consumption of the device.
Sturdy, Durable and Reliable	The screen and key components are made of high - quality stainless - steel materials, with excellent corrosion resistance and wear resistance. It can still operate stably under harsh working conditions, and the service life of the device is up to 8 - 10 years.
Flexible Installation Adaptability	A variety of specifications and models are provided, with a water treatment capacity ranging from 5 - 1500m³/h. It supports multiple installation methods such as vertical and horizontal, and can be flexibly adjusted according to the on - site space and pipeline layout.
Stable Operation Guarantee	The unique scraper structure design and sealing technology ensure thorough removal of impurities, avoid screen blockage, guarantee the long - term stable operation of the device, and reduce downtime caused by failures.

IV. Technical Parameters

Parameter Category	Specific Parameters
Device Material	Stainless steel 304, stainless steel 316L, carbon steel lined with rubber
Screen Material	Stainless steel 304, stainless steel 316L
Filtration Precision	20μm, 50μm, 100μm, 200μm, 500μm, 1000μm, 3000μm (customizable)
Operating Pressure	≤1.6MPa
Operating Temperature	5 - 80℃
Cleaning Time	30 - 120 seconds
Cleaning Water Consumption	0.5 - 1% (of treated water volume)
Single - unit Treatment Capacity	5 - 1500m³/h
Inlet and Outlet Pipe Diameters	DN25 - DN350 (customizable)
Motor Power	0.2 - 2.2kW (depending on device specifications)

V. Application Fields

1. Industrial Production Field

• Petrochemical Industry: Used for the filtration of chemical raw material liquids and the purification of circulating cooling water, removing impurities such as catalyst particles, oil stains, and rust, ensuring the stable production process and reducing equipment wear and failures.

• Power Industry: Conducts in - depth filtration of the circulating cooling water and boiler makeup water in power plants, preventing impurities from causing scaling of condensers and blockage of pipes, and ensuring the safe and efficient operation of power generation equipment.

• Iron and Steel Metallurgy: In the treatment of steel rolling cooling water and blast furnace slag flushing water, it effectively intercepts iron oxide scale, suspended solids, etc., improves cooling efficiency, and extends the service life of equipment.

2. Sewage Treatment Field

• Municipal Sewage Treatment Plants: As an advanced sewage treatment device, it filters the residual suspended solids and colloids in the water after secondary treatment, making the effluent meet the reuse standards for municipal miscellaneous use, landscape water replenishment, etc.

• Industrial Wastewater Treatment: Filters the industrial wastewater generated by industries such as chemical, pharmaceutical, and printing and dyeing, removes pollutants, and helps the wastewater meet the discharge standards or be recycled.

3. Food and Beverage Industry

• Production Water Filtration: Ensures the quality of production water, removes microorganisms, impurities, and odors in the water, meets the hygiene standards for food and beverage production, and improves product quality.

• Raw Material Filtration: Filters the raw materials for juice, wine, etc., removes pulp residues, precipitates, etc., and improves the clarity and taste of products.

4. Commercial and Civil Buildings

• Central Air - Conditioning Systems: Filters the impurities in chilled water and cooling water, prevents the scaling of heat exchangers, improves the energy efficiency of air - conditioning systems, and reduces maintenance costs.

• Community Secondary Water Supply: Effectively removes rust, sediment and other impurities in the pipes, ensuring the cleanliness and safety of residents' domestic water.

VI. FAQ

1. How is the cleaning effect of the scraper self - cleaning filter ensured?
   The scraper is made of high - strength and wear - resistant materials and closely fits the screen. It can effectively scrape off various stubborn impurities during the rotation process. At the same time, the device controls the cleaning frequency through precise pressure difference and time monitoring, ensuring that the screen is cleaned in time before the impurities accumulate and affect the filtration performance. In addition, the unique drain design ensures that the impurities can be quickly discharged to avoid secondary pollution, thus guaranteeing the cleaning effect.

2. What should I do if abnormal noise occurs during the operation of the device?
   If abnormal noise occurs, first check whether the device is installed firmly and whether the pipeline connections are loose. If the installation is normal, it may be due to abnormal contact between the scraper and the screen or problems with the motor components. At this time, the device should be shut down immediately, and professional technicians should be contacted to check the wear condition of the scraper, the state of the motor bearings, etc., and repair or replace the damaged components in time.

3. How to choose the appropriate filtration precision under different water qualities?
   For raw water with good water quality and fewer impurities, such as the preliminarily treated municipal tap water, a filtration precision of 100 - 300 microns can be selected. If the raw water contains more impurities, such as river water and lake water, a precision of 20 - 100 microns is recommended. In industrial production scenarios with high water quality requirements, such as the water used in electronic chip manufacturing, high - precision screens with a precision of less than 20 microns are required to meet the production needs.

   
   

VII. Conclusion

With its unique scraper cleaning technology, efficient and stable filtration performance, and wide application adaptability, the scraper self - cleaning filter has become the preferred equipment for water treatment in many industries. Whether in the harsh industrial production environment or the quality - focused civil life scenarios, it can guarantee the water quality and the stable operation of the system with excellent performance. Choosing our scraper self - cleaning filter means choosing an efficient, intelligent, and reliable water treatment solution, escorting your water safety and production operation.

If you are interested in this product or have any questions, please feel free to contact us at any time.

VIII. Related Products

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https://www.le-filter.com/wastewater-treatment/multimedia-filter/