Cooling tower filtration sand tankIt is a commonly used cooling water systemMechanical filtration deviceAlso known as shallow filter or circulating water filtration device, it is mainly used to remove sediment, rust, algae, and other suspended impurities from circulating water,Protect heat exchange equipment, nozzles, and water pumpsImprove system operational efficiency and extend equipment lifespan.

1、 What is a cooling tower filter sand tank?

It is a type of packing withQuartz sand, multi-media or anthracite coalA pressurized container (commonly known as a "sand tank") is used to purify impurities when water flows through the sand layer. Usually used asSide filter systemPart of it is connected to the cooling water circuit.

2、 Working principle of cooling tower sand filter

Normal filtering:

The cooling circulating water flows in through the top inlet, passes through the filter layer, and impurities are intercepted. The purified water is discharged from the bottom.

Backwash process:

After excessive impurities accumulate inside the sand tank, the pollutants are discharged to the sewage outlet by reverse flushing the filter layer with water flow.

Brief process:

Circulating water main circuit (taking 5-10%), sand tank side filter filtration, reflux main circuit ↑ timed/pressure difference backwash discharge

3、 Main structure of circulating water filtration device

4、 Advantages of Shallow Media Filter Products

• High filtration accuracy(usually 30-50 μ m)

• Simple structure and reliable operation

• Easy to backwash and maintain

• Suitable for long-term continuous operation

• Modular design, suitable for medium to large systems

5、 Reference for selection parameters of shallow sand filter

6、 Applicable scenarios for cooling tower sand filters

• Industrial cooling water tower circulating side filter

• Central air conditioning cooling water system

• Packing nozzle anti blocking protection

• Circulating water purification in power plants and chemical plants

• Landscape water/fountain water purification

7、 Maintenance suggestions for cooling tower side filters

• Check the pressure difference or flow rate once a month and promptly backwash

• Regularly check the thickness and wear degree of the filter layer

• The sand layer is usually replaced every 3-5 years

• The automatic control valve needs to check the operation status of the solenoid valve and motor