The tubular automatic backwash filter, featuring a unique tube - bundle structure and intelligent backwashing technology, offers continuous and high - efficiency filtration, ensuring stable operation and superior performance in various fluid treatment applications.

I. Product Introduction

The tubular automatic backwash filter is an advanced filtration device that combines a tubular structure with automatic backwashing functionality. The core of the filter consists of a bundle of filter tubes, usually made of high - quality stainless steel or other corrosion - resistant materials. These tubes are equipped with fine - meshed screens or filter media on the inner or outer surfaces, capable of effectively intercepting suspended solids, colloids, rust, and other impurities in the fluid. When the fluid enters the filter, it passes through the filter tubes, and the contaminants are trapped while the purified fluid flows out. Once the impurities accumulated on the filter tubes cause the pressure difference between the inlet and outlet to reach a preset value or the operation time reaches a set duration, the automatic backwash system is activated. Through a series of precise control mechanisms, the filter conducts self - cleaning, flushing away the trapped impurities without manual intervention. This design ensures long - term stable filtration performance, making it widely applicable in industries such as industrial water treatment, chemical processing, food and beverage production, and power generation.

II. Working Process

1. Normal Filtration Phase

• Fluid Inflow: The fluid to be filtered enters the filter housing through the inlet port. Driven by the system pressure, it evenly distributes into the space surrounding the filter tube bundle.

• Filtration through Tubes: The fluid then permeates through the filter tubes from the outside to the inside (or vice versa depending on the design). During this process, the fine - meshed screens or filter media on the tube surfaces intercept various impurities, while the clean fluid passes through the tubes and converges towards the outlet, ready to be transported to the subsequent processes.

2. Backwash Trigger

• Pressure Difference Trigger: As the filtration continues, impurities gradually accumulate on the surfaces of the filter tubes, increasing the resistance and thus the pressure difference between the inlet and outlet of the filter. When this pressure difference reaches the pre - set threshold (usually 0.05 - 0.1 MPa), it signals the start of the backwash process.

• Time - Based Trigger: In cases where the fluid has relatively good quality and the pressure difference does not rise significantly, the filter also initiates the backwash based on a pre - determined operation time (e.g., 8 - 24 hours). This ensures that the filter tubes are cleaned regularly to maintain optimal filtration efficiency.

3. Backwash Process

• Valve Adjustment: At the beginning of the backwash, the inlet valve partially closes or adjusts the flow, while the backwash outlet valve opens fully. This change in valve status redirects the flow path within the filter.

• Reverse Flow Flushing: A high - velocity reverse flow of clean fluid (either from a dedicated backwash water source or the treated water storage) is introduced into the filter tubes. The reverse flow scours the surfaces of the filter tubes, loosening and flushing away the accumulated impurities. In some models, an air - water combined backwash method is employed, where compressed air is injected to enhance the scouring effect, especially for stubborn contaminants.

• Impurity Discharge: The flushed - out impurities are carried by the reverse - flowing fluid and discharged from the filter through the backwash outlet. The entire backwash process typically lasts for 30 - 120 seconds, depending on the filter size and the degree of contamination.

4. Filtration Resumption Phase
   After the backwash is completed, the valves return to their normal positions. The inlet valve fully opens, and the backwash outlet valve closes. The filter then resumes its normal filtration operation, ensuring a continuous supply of purified fluid.

III. Product Features

IV. Technical Parameters

V. Application Fields

1. Industrial Water Treatment

• Cooling Water Filtration in Power Plants: Removes impurities such as silt, algae, and corrosion products from the cooling water, preventing condenser fouling and ensuring the efficient operation of power generation equipment.

• Process Water Filtration in Chemical Plants: Filters chemical process water, removing catalyst particles, suspended solids, and organic contaminants, ensuring the smooth progress of chemical reactions and product quality.

2. Chemical Processing

• Raw Material Filtration: Filters chemical raw materials to remove impurities, ensuring the purity of feedstock and improving the yield and quality of chemical products.

• Product Filtration: In the production of chemicals, it helps to remove residual impurities from the final products, meeting strict quality control standards.

3. Food and Beverage Production

• Water Filtration for Production: Ensures the safety and hygiene of production water by removing microorganisms, suspended solids, and odorous substances, which is essential for food and beverage quality.

• Product Filtration: Filters beverages, juices, and edible oils to improve clarity and remove particles, enhancing product appearance and shelf - life.

4. Municipal Water Supply and Sewage Treatment

• Pretreatment in Waterworks: As a pretreatment device in water treatment plants, it removes large - sized particles and suspended solids from raw water, reducing the burden on subsequent treatment processes.

• Advanced Treatment in Sewage Treatment Plants: Filters the effluent from secondary treatment in sewage treatment plants, further reducing the content of suspended solids and meeting the discharge or reuse standards.

VI. FAQ

1. How often does the backwash occur?
   The frequency of backwashing depends on multiple factors, including the quality of the fluid being filtered, the filtration precision, and the flow rate. Generally, it is triggered by either the pressure difference reaching 0.05 - 0.1 MPa or the operation time reaching 8 - 24 hours. In applications with poor - quality fluid or high - precision filtration, the backwash may occur more frequently.

2. Can the filter tubes be replaced?
   Yes, the filter tubes are replaceable. When the filter tubes are severely damaged, blocked, or their filtration performance significantly deteriorates, they can be individually replaced. This modular design simplifies maintenance and reduces downtime, ensuring continuous operation of the filter.

3. What should I do if the filter shows abnormal pressure during operation?
   If abnormal pressure occurs, first check whether the inlet and outlet valves are fully open and if there are any blockages in the pipelines. Then, monitor the pressure difference between the inlet and outlet. If the pressure difference is much higher than the normal range, it may indicate excessive accumulation of impurities in the filter tubes, and an immediate backwash is recommended. If the problem persists, contact our technical support team for further inspection and troubleshooting.

   
   

VII. Conclusion

The tubular automatic backwash filter stands as an excellent choice for efficient and reliable fluid filtration. With its innovative tube - bundle structure, intelligent automatic backwashing system, and outstanding performance features, it can effectively meet the filtration needs of diverse industries. Whether it's safeguarding industrial production processes or ensuring the quality of water supply, this filter provides a stable, energy - efficient, and low - maintenance solution. Choosing our tubular automatic backwash filter means investing in a high - quality, long - lasting filtration system that will enhance the efficiency and reliability of your operations.

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

VIII. Related Products

Cartridge Filter Housings

https://www.le-filter.com/wastewater-treatment/cartridge-filter-housing/

Multimedia filter

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