Widely-Applied Scraper-Type Self-Cleaning Filter

The widely-applied scraper-type self-cleaning filter is an efficient and automated water treatment equipment widely used in industrial circulating cooling water systems, reverse osmosis pretreatment, industrial wastewater treatment and other fields. Its design is designed to continuously maintain the smooth flow of water and the cleanliness of water quality by automatically monitoring and cleaning the filtration surface. Compared with the traditional way of manual cleaning or periodic replacement of the filter screen, the scraper-type self-cleaning filter significantly improves the operating efficiency and reduces maintenance costs and downtime.

 

Working principle

The core components of the widely-applied scraper-type self-cleaning filter include the filter cylinder, filter screen, scraper system, drive device (usually electric motor), control system and flushing valve. Its working process can be roughly divided into the following steps:

1. Filtration stage

Water enters the filter from the water inlet, and when passing through the filter, impurities are trapped on the surface or inside the filter, while clean water flows downstream of the system through the filter.

2. Monitoring and triggering cleaning

The built-in differential pressure sensor or time controller of the device monitors the pressure difference at both ends of the filter or automatically triggers the cleaning program when the pressure difference reaches the set value or the time is reached according to the preset time period.

3. Scratching process

The drive device starts to drive the scraper system to move along the surface of the filter screen. The scraper is tightly fitted to the filter screen design, which can effectively scrape off the dirt attached to the filter screen and concentrate it in the collection area at the bottom of the filter cartridge.

4. Sewage flushing

At the same time or after scraping, the sewage valve is opened, and the collected dirt is discharged from the filter using the pressure of the system itself or the power provided by the external flushing pump to complete the cleaning process.

5. Restore filtration

After the cleaning is completed, the sewage valve is closed, and the system returns to normal filtration state. The whole process does not need to interrupt the system operation to achieve continuous water supply.

 

Key technical features

1. Efficient automation: Through an integrated intelligent control system, fully automated operations of filtration, monitoring, and cleaning are realized, reducing manual intervention and improving operating efficiency.

2. Low maintenance costs: Due to the automatic cleaning design, the replacement frequency and maintenance workload of the filter screen are greatly reduced, and the long-term operating cost is low.

3. Continuous operation: does not affect the normal water supply of the system during the cleaning process, ensuring the continuity and stability of the process.

4. High filtration accuracy: Filters with different pore sizes can be selected according to application requirements, providing filtration accuracy from tens of microns to several millimeters to meet different water quality requirements.

5. Strong adaptability: Suitable for a variety of water quality conditions, including high turbidity, water sources containing a large amount of suspended matter, widely used in chemical, power, steel, food processing and other industries.

6. Energy saving and emission reduction: Compared with traditional filtration methods, the scraper-type self-cleaning filter can effectively reduce water waste and energy consumption caused by frequent replacement of filter media or shutdown for cleaning.

 

Application fields

The widely-applied scraper-type self-cleaning filter is widely used in the following fields:

1. Chemical industry: Used to filter chemical raw materials, intermediates, finished products, etc., to improve product quality.

2. Petroleum industry: Used to filter impurities in oil products to ensure oil quality.

3. Pharmaceutical industry: Used to filter pharmaceutical raw materials, intermediates, finished products, etc., to improve the quality of medicines.

4. Water treatment industry: Used to filter impurities in water sources to ensure water quality safety.

5. Food industry: Used to filter food raw materials, intermediates, finished products, etc., to improve food safety.

 

Parameters

Suitable liquid	Water and viscous liquid (<800000cps, impurity content <1000ppm)
Filtration accuracy	30-1500 μm
Pressure	1.0 MPa, higher pressure can be customized
Temperature	0-200°C (depending on seals)
Filtration area	0.14m2-1.45m2
Cleaning pressure difference	0.05MPa
Connections	Flange, HG20592-2009 (standard)
Filter element material	V-shaped wedge mesh, 304/316L/2205/titanium
Filter housing material	304 / 316L / CS
Gear motor	180W, three-phase, 380V, IP55 protection class
Scraper material	PTFE
Housing sealing material	NBR (standard) / VITON(FKM)
Blow-down valve	Pneumatic ball valve, IP65 protection class

 

FAQ

1. Q: What is the function of a filter?

A: The main function of a filter is to remove solid particles, impurities, and harmful substances from liquids or gases, in order to achieve purification, clarification, and protection of equipment.

2. Q: How to choose a suitable filter?

A: When choosing a filter, factors such as the properties of the material being filtered (e.g., viscosity, temperature, corrosion), required filtration accuracy, processing capacity, operating pressure and medium, as well as the type, material, size, and installation method of the filter should be considered.

3. Q: What is the working principle of a filter?

A: The working principle of a filter mainly relies on physical screening, deep interception, absorption, or chemical reactions to remove impurities or harmful components from the material being filtered.

4. Q: How to maintain and care for a filter?

A: Maintenance of filters includes regular cleaning or replacement of filter elements, inspection of seals and fasteners, maintaining stable operating pressure, and avoiding overloading. Specific methods should be referenced from the filter's instruction manual and maintenance guides.

5. Q: What is the service life of a filter?

A: The service life of a filter depends on its working environment, processing volume, and filtration accuracy. Generally, when the filter's pressure drop reaches a certain value or the filtration effect decreases significantly, it needs to be replaced or cleaned.

6. Q: What should be paid attention to during filter installation?

A: During filter installation, attention should be paid to the directionality, ensuring that the fluid enters and exits from the correct ports. Also, the piping system should be cleaned before installation, and the filter should be securely fastened and sealed as required by the instructions.

7. Q: What is the replacement cycle for filters?

A: The replacement cycle for filters depends on their working conditions and filtration requirements, and is usually indicated by pressure difference indicators or timers. When the filter's pressure drop reaches the set value or the filtration effect decreases, it should be replaced in a timely manner.

 

Why Choose Us

· Professional manufacturer with many years' experience

· Good quality with competitive price

· OEM & ODM are welcome

· Various payment items are acceptable

· Good service by experienced manager

 

AIDA Philosophy

1. Management Concept:

· Satisfy the customers' demand --- Touch customers, trust with our products and services

· Make employees happy --- Pursue higher material and spiritual happiness

2. Company Mission:

· Focus on customer needs, provide best filtering solution

· To be the lifelong partner with customers

3. Corporate Vision:

· Become a global purification leadership brand

4. Values:

· Customer: Pursue the ultimate experience, enjoy excellent quality

· Team: Trust, responsibility, growth, win-win

· Work: Simple, sincere, efficient, dedicated