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What kind of quartz sand is generally used for swimming pool filter sand tank

2023/03/31

Swimming pool water purification is generally equipped with a circulating filtration system. Among them, the filtering function is the swimming pool filter sand tank. The filter material filled in the sand tank is generally quartz sand.

Just what kind of quartz sand is more suitable for general use? Find out below. Quartz sand is an essential filter material for swimming pool filtration, and it is also the filter material for its main function. The filter is to use special quartz sand to eliminate the tiny dirt in the pool.

First, the swimming pool water is pumped into the sand tank by the water pump. Microscopic dirt in the water is captured and filtered out by the sand bed. The filtered clean water passes through the control switch at the bottom of the filter and returns to the swimming pool through the pipeline.

This is a set of continuous and automatic circulation process, which makes the swimming pool water get purified. The quartz sand is closely arranged in the sand tank, and the pool water is from top to bottom. The solid suspended matter in the water is adsorbed and trapped by the quartz sand. At the same time, these trapped impurities overlap and bridge to form a thin film to continue to filter the water. Impurities. If the quartz sand is to be closely arranged, the specification should be smaller.

This is so that it can be arranged tightly. Has a good alignment effect. Generally, the most commonly used specifications are 1-2mm, 2-4mm, and 4-8mm.

It can be selected according to the size of the sand tank, or it can be mixed and arranged in layers, and the effect is also very good. Quartz sand has excellent wear resistance, heat resistance, corrosion resistance and tough hardness. It can filter out better quality water with a larger filtration capacity.

The turbidity and pollution index of the filtered water will decrease due to the increase of the storage capacity of the filter. Sand tank filtration principle: Generally, a certain scale of quartz sand is placed in the sand tank. The size and specification of the quartz sand are different within a certain range. In the sand tank, the quartz sand is arranged from top to bottom, from small to large. , water enters from the upper layer of sand and comes out from the lower layer. When water flows through the filter layer from above, part of the solid suspended matter in the water enters the tiny holes formed by the upper filter material and is trapped by the surface layer of the filter material due to adsorption and mechanical retention. At the same time, the suspended matter between these trapped Overlapping and bridging occurs again, as if a thin film is formed on the surface of the filter layer, which continues to filter the suspended matter in the water, which is the so-called membrane filtration of the surface layer of the filter material.

This filtering effect is not only on the surface of the filter layer, but also has this interception effect when water enters the middle filter layer. In order to distinguish it from the filtration of the surface layer, this effect is called osmotic filtration. In addition, because the sand particles are closely arranged with each other, when the suspended particles in the water flow through the tortuous channels in the sand layer, there will be more opportunities and time to collide and contact with the surface of the filter material. The suspended solids in the sand layer bond with the flocs on the particle surface of the sand layer to form a contact coagulation process. The advantages of the stainless steel sand tank: 1. The stainless steel sand tank is not bad forever, and the effective service life is at least 50 years.

The life of the glass fiber sand tank is 5 years; 2. The stainless steel sand tank is very environmentally friendly and will not cause secondary pollution to the water quality. The glass fiber sand tank will slowly dissolve, causing secondary pollution to the water quality, and the glass fiber dissolved in water will cause serious damage to the human body, and is a strong irritant and a strong carcinogen. The use of glass fiber sand tanks has been banned in developed countries; 3. Stainless steel sand tanks are very corrosion-resistant and are the necessary filter equipment for mariculture and aquariums, while glass fiber sand tanks cannot be used for this purpose; 4. The effectiveness of stainless steel sand tanks The temperature resistance can exceed 300 degrees, while the temperature resistance of the glass fiber sand tank is only 43 degrees; therefore, it is the preferred filter equipment for hot springs; 5. The surface of the stainless steel filter sand tank is smooth and the texture is excellent, which can effectively improve the grade of swimming pool equipment; 6. Stainless steel sand tank The cylinder can be customized for any flow rate equipment.

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