SU982727A1 - Filter with hydralically filled bed - Google Patents

Description

one

The invention relates to water treatment, in particular to the design of alluvium ionite or sorption filters, intended for deep desalting and fine water purification from corrosion products.

Known pre-casting filter containing vertical frames, on which on both sides are flat filter elements}.

A disadvantage of this device is that during its operation there is a danger of washing the alluvial sorbent layer.

The closest technical solution to the invention is a precoat filter containing a vertical cylindrical body placed in the upper part of the body horizontally tube plate with filter cartridges fixed in it and an assembly-distribution system in the form of perforated pipes located above and below the filter cartridges.

The pulp enters first into the tubular distribution system, and then into the working chamber of the filter. It is then filtered through the side surface of the filter elements. The dispersed phase of the pulp is deposited on the nylon mesh of the cartridge filter element, and the water passes through it and is collected by the upper

5 tubular prefab system 2.

A disadvantage of the known alluvial filters is that their designs do not provide for the uniform washing of powdered ion exchangers and active carbons as

10 in thickness and in dispersion of the alluvial layer across the entire lateral surface of the filter elements, which accounts for the lack of reliability and efficiency of their work.

The purpose of the invention is to increase the uniformity of the thickness and dispersion of the precoat layer.

This goal is achieved by the fact that the filter with the alluvial layer contains a vertical cylindrical body, spaced in the upper part of the body horizon. The tube plate with the filtering cartridges fixed in it and the collecting system in the form of perforated tubes located above and below the filter cartridges is equipped with

means for turbulent flow of the precoat pulp, made in the form of rings with holes, located outside the filter cartridges, cartridges at a distance from one another.

FIG. 1 shows the filter section; in fig. 2 - filter cartridge for alluvial fillet; in fig. 3 shows section A-A in FIG. one.

The alluvial filter, for example, an ionite filter, comprises a housing I, in the upper part of which a tube plate 2 and a tubular assembly system 3 are installed, intended to collect filtered water and to distribute the wash water. On tube plate 2, filtering elements 5 of cartridge type with alluvial layer 6 (ionite, active carbon) are fastened with the help of tightening bolts 4. On the outer surface of each filtering element 5, turbulators 7 are fixed at a uniform distance from each other in the form of flat rings made, for example, of a polymer with holes 8. Experimentally, the optimal number of turbulators on each filter element 4-6 scht, the distance between them is on average 250 mm. The diameter of the turbulizer is equal to the distance between the axes of adjacent filter elements (120 mm). Number of holes 43 pcs with a diameter of 2 mm. In the lower part of the housing 1 a tubular distribution system 9 is installed, designed to distribute the pulp and source water, the filter is equipped with a pipe 10 for supplying the source water and a bottom outlet 11 for discharging the filtrate.

The filter works as follows.

The raw water enters the tubular distribution system 9 and is distributed over the working chamber area of the apparatus. Further, it is filtered through the surface of the filtering elements 5 with alluvial layer 6 and freed from salts of dispersed, colloidal and dissolved impurities. The purified water is collected by the upper collecting pipe system 3 and is discharged from the filter.

When washing the filter elements 5, water enters the upper tubular system 3 and is distributed over the tube plate 2, and then enters the cartridges and is discharged through the lower tubular system 9. In this case, the ionite mixture layer is torn off, washed out and removed from the working chamber of the apparatus along with wash water. When the alluvium layer 6 is formed, the pulp enters first into the lower tubular distribution system 9, and then into the working chamber of the apparatus. Passage through

the system of turbulators 7, alluvial pulp forms a uniform layer on the filter element. The turbulators create turbulent jets in the laminar flow in the space between the filter housing and

filter elements 5. Turbulent jets create the possibility of a more uniform distribution of the pulp both in thickness and in dispersion composition over the entire lateral surface of the filter elements.

О The placement of the lamellar rings with holes along the entire length of the filtering elements makes it possible to create turbulent jets when the filter layer is washed up in the laminar flow of the pulp.

the rise of not only small but also large fractions of the alluvial material across the entire length of the cartridge filter element, i.e. placing the turbulators on the filter elements allows to obtain a uniform filter layer, thereby increasing

filter cycle time.

In comparison with the known filtering method, using a filter element of alluvial ionite and sorption filters allows a more uniform alluvial layer both in thickness and dispersion composition of the powdered material, due to which the filter cycle of the NIF and NOF increases the average sorption capacity of the alluvial layer. by 20%, and the consumption of ionite or active carbon is reduced on average by 20%.

Claims (2)

1. The patent of Switzerland No. 536653, cl. B 01 D 35/22, 1973. 2. Recommendations for the deep purification of desalted water on the alluvial ionite filters. Izd.-in VODGEO, 1979, p. 28 TT11TGGT .lilliiii.  11 I i J. i I I t I I "t I ilj I I I" I t t I rTi rTi fT GP GT1 GT1 ryi rjn rpi «p i I I M I 111 Li J I l J “I r I J tit lit ill m gtr gut gg t TI gt t Gy  I I I and I and I I I I I 1.1 I. I I hl d | | innnnn mnnnn .  "1 J L L Ill III i I j I i i GP rTJ g 1 GT tT M M T II Illjl / //////////// //////// ////// Fi9. one All , W 7 / t 8 t t TAW 7 Fig.d