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Analysis of three major filter materials for filter sand tanks


Analysis of three major filter materials for filter sand tanks Sand filter tanks are also known as filter sand tanks, sand tank filters, sand filter tanks, etc. It got its name from the initial use of quartz sand as a filter material. Because the filter sand tank has the advantages of portability, simple operation, low cost and other advantages, it has been more and more used in various water treatment industries.

The filter material matched with it is also different because of the different functions of the filter sand cylinder. Below we introduce three common filter materials: 1. Quartz sand If the purpose of water treatment is to filter out large particles of suspended solids in the water, pure white quartz sand is generally used. Its main component is silicon dioxide.

Quartz sand is difficult to react with acid and alkali, and its chemical properties are stable. And the filter coefficient is small, the material is convenient and the price is cheap. It is the first choice for sand filter media.

The quartz sand usually used in water treatment mainly has several specifications: The diameter of No. 3 sand is 2-4mm, which is generally used to filter impurities with large particles, such as the primary filtration of shrimps in circulating water. The shell is filtered out before the next step of water treatment can be carried out. At this time, you can choose No. 3 sand; No. 4 sand, 1-2mm in diameter, is mostly used for filtering larger particles, such as adult green algae in landscape water; No. 5 sand, 0.5-1.5mm in diameter, is mostly used for filtering smaller particles. Such as secondary filtration in factory farming filtration system, swimming pool water treatment, etc.

It can filter out most solid particle impurities such as fish feces, extra bait, hair, etc.; No. 6 sand with a diameter of 0.2-0.5mm is generally used for fine filtration, such as primary filtration of drinking water. 2. Activated carbon Activated carbon has strong physical and chemical adsorption properties, and can adsorb colored substances, some salts, ozone, and even bacteria in water. Activated carbon is divided into wood charcoal and coal charcoal.

The effect is superior to wood charcoal. The adsorption of activated carbon varies according to different materials and production processes, and the iodine value is used as a standard for evaluating the quality. Generally, an iodine value exceeding 850 is a high-quality activated carbon.

The disadvantage of activated carbon is that it needs to be replaced in time after it reaches saturated adsorption. 3. Biochemical filter materials Typical biochemical filter materials include volcanic stones, hair brushes, and porous ceramic rings. As the carrier of biochemical bacteria, the biochemical filter material generally has a slow water flow.

The flexible backwashing function of the sand tank can easily wash away the dirt retained by the biochemical filter material. Poolking is the best swimming pool equipment manufacturer and supplier in China. Poolking exists to provide the highest quality swimming pool equipment while offering competitive pricing..

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