CS269687B1 - Filtration cartridge - Google Patents

Abstract

It is suitable for water treatment or purification technologies and is intended for filters flowing from top to bottom. It consists of at least two filter gates made of materials and different specific gravity. The lower filter layer consists of artificial corundum with a grain size of 0.5 to 0.7 mm. Under the artificial corundum layer there may be an additional layer of clay. The filter cartridge increases the filtration efficiency, allows for longer filtration cycles and brings other economic benefits in the form of energy and water savings, reduced handling and technological improvements.

Description

The invention relates to a filter cartridge suitable for treatment or purification technologies.

The filter cartridge is designed for filters overflowing from top to bottom.

At present, various filter materials are used in water treatment or purification technologies, such as various types of sand and other sharpened filter materials with a lower weight than my sand. In the case of two filter layers, a combination of sand with a black coal material is used, the arrangement of the filter layers being such that the black coal forms a top layer with a larger particle size.

When filtering water on these filter cartridges, suspended impurities penetrate into the filtered water as a result of the filtration of the filter layers. Therefore, it is necessary to interrupt the filtration cycle as a precaution and regenerate the filters.

It has now been found that the disadvantages of the described filter cartridges are largely eliminated by the filter cartridge according to the invention, consisting of at least two filter layers of materials of different specific gravity.

The essence of the invention lies in the fact that the lower filter layer consists of artificial corundum with a grain size of 0.5 to 0.7 mm.

Below the layer of artificial corundum, there may also be an underlying layer of sand reaching to the new level of the washing nozzles, which, however, does not fulfill the function of a filter layer.

The centrifuged artificial corundum traps the impurity suspension penetrating from the higher filter layers and gradually increases the hydraulic pressure loss of the filter cartridge.

When the corundum filter layer is calibrated, the resistance of the filter material increases sharply, the filtration process is interrupted and the suspension penetrates! impurities do not occur in the filtered water. At the same time, this fact makes it possible to make better use of the sludge capacity of the filter cartridge and simplifies any automation of filter washing. Filtration cycles are more expensive, compared to the filters currently used, washing water and energy are saved and a smaller number of manipulations with technological equipment is required. The centrifuged artificial corundum of smaller grain size than sand or other material, which may form a higher layer of filter cartridge, ensures with its high specific gravity that the original arrangement of the filter layers remains when washing the filter cartridge when it is opposite to the bottom. The layer of artificial corundum remains under the sand.

Other advantages of the filter cartridge according to the invention include the desired stable quality of the filtered water and the advantageous properties of the filter layer of artificial corundum in terms of time of use, i. Its high abrasion resistance and high resistance to chemicals.

Example

The subject of the invention illustrates an example of conducting a filter cartridge in a water filter. The filter cartridge was arranged from top to bottom as follows:

- 40 cm black-gray filter material FU 1 with a grain size of 1.0-2.0 mm

- 50 cm filter silica sand FP 1 grain size 0.7 - 1 mm - 5 cm artificial corundum grain size 0.5 - 0.65 mm

- base layer of filter sand FP 2 with a grain size of 1.0 - 1.6 mm / F 2 /

The field test was performed in comparison with a filter filled with a filter cartridge arranged as follows:

- 40 cm black-clay material PV 1 grain size 1.0 - 2.0 mm ·

- 60 cm filter silica sand FP 1 grain size 0.7 - 1.0 / F 1 /

Water from the Bratislava - Vajnory locality was filtered.

The results compared to raw water are shown in Table 1:

CS 269 687 81

Monitored parameters Raw water Water filtered through F 1 Water filtered through F 2 Water temperature ° C 11 11 11 pH 7.9 7.6 7.6 Alkalita mval. 11 2.9 2.7 2.7 Color mg. 11 Pt 20 10 5 Turbidity mg. 1 “1 ZF 8.5 2.4 2.1 Oxidizinate mg. 11. 4.48 2.0 1, 96 Iron mg. 11 0.1 0.1 0.05

Artificial corundum can be used in vigorous combinations with conventional filter materials. A large possibility of use can be expected in the optimization, intensification of water treatment plants, or wastewater treatment plants and also the construction of new buildings of this kind. -

Claims (2)

CS 269 687 B1 2 Monitored parameters Raw water Water filtered through F 1 Water filtered through F 2 Water temperature ° C 11 11 11 pH 7.9 7.6 7.6 Alkalinity mval. 1 "1 2,9 2,7 2,7 Color mg. 1- ^ Pt 20 10 5 Haze mg. 1" ^ ZF 8,5 2,4 2,1 Oxidability mg 1 "1,48 2,0 1, 96 Iron mg 1 "^ 0,1 0,1 0,05 Artificial corundum can be used in vigorous combinations with conventional filter materials. It is possible to assume a great possibility of use in the optimization, intensification of water treatment, wastewater treatment plants and also the construction of new buildings of this kind. BACKGROUND OF THE INVENTION Filtration charge, particularly suitable for water treatment or purification technology, in top-down filters, comprising at least two filter layers, of a material-specific density, characterized in that the filter bed comprises an artificial corundum having a grain size of 0, 5 to 0.7 mm.