RU77557U1 - FILTER DEVICE - Google Patents

Abstract

The utility model relates to filtration plants for purification of natural and waste waters, as well as other liquid solutions using ion-exchange processes, and can be used in energy, metallurgy, chemical and other industries using demineralized or softened water in technological processes. The proposed filtration device contains a housing in which filter material and separation devices are placed in the form of partitions equipped with filter caps, as well as a piping system. At the same time, the lower part of the housing is connected to the compressed air supply line, and an automatic device for air discharge is installed on the upper housing lid. As shown by the experiments, the washing performance of the modified filter resin increases by 20-25% compared to the unmodified version.

Description

The utility model relates to filtration plants for the treatment of natural and wastewater, as well as other liquid solutions using ion-exchange processes, and can be used in energy, metallurgy, chemical and other industries using demineralized or softened water in technological processes.

Currently, a large number of filtration units (filters) of various capacities are known, differing from each other by the features of the used filtration material and the specifics of the separated mixtures. These include various nunch and druk filters, filter presses, and so on. (V.D. Lukin, Yu.A. Emelyanov, Filtration in the chemical industry, L-D, chemistry, 1982, pp. 6-61, A.N. Planovskiy, P.I.Nikolaev, processes and apparatuses of chemical and petrochemical technology, M., Chemistry, 1972, S. 72-88).

Common to all liquid filters is the presence of a housing with devices for supplying the mixture to be cleaned and the filtrate outlet, as well as the filtration material placed in it.

Thus, a device is known for purifying water by filtering through a layer of ion-exchange resins (RU 22149685, 1999). The installation is a housing with nozzles and upper and lower distribution devices,

containing ion exchange resin. In addition to the ion exchange resin, a layer of inert material (inert) with a density lower than the density of water is introduced into the casing.

The disadvantage of the installation is the lack of cleaning efficiency due to large losses of resin and inert through the upper switchgear during regeneration by the flow from the bottom to the top when the housing is fully loaded or due to the low efficiency of the filter when it is not fully loaded.

Closest to the claimed technical solution is a filtration device (RU 23786, 2002), which is an ion-exchange resin-containing housing with nozzles and upper and lower distribution devices, between which separation devices are installed in the form of partitions equipped with filter caps, containing an ion-exchange resin.

The device solves the problem of entrainment of resin and inert, however, it does not allow the resin to be cleaned according to the most promising technology using a mixture of water and air bubbles.

The problem solved by the authors was to modify the filter by equipping it with devices that allow compressed air to pass through the resin and inert.

The technical result was achieved by connecting the compressed air supply line to the lower part of the housing and equipping the upper housing cover with an automatic device (valve) for air discharge.

A general view of the filtration device is shown in figure 1, where the following notation is introduced:

1 - filter housing;

2 - inert layer;

3 - a layer of ion-exchange resin, for example, cation exchange resin;

4 - lower partition with filter caps;

5 - upper partition with filter caps;

6 - automatic device for discharging air;

7 - fitting for supplying compressed air;

8 - the upper pipeline;

9 - lower pipeline

The filter works as follows. In the working cycle, the liquid to be cleaned enters through the upper pipe 8 into the housing 1, passes through the caps of the septum 5, then through inert 2 it enters the resin layer 3, where it is cleaned. After that, the water passes through the caps of the partition 4 and goes to the consumer. The resin 3 is pressed against the partition 5, however, the size of the slots of its caps prevents the entrainment of the resin. During the regeneration of the resin, the flow from bottom to top, air through the nozzle 7 together with water enters through the lower pipe 9, passes through the baffle 4, then through the resin 3 and inert 2, providing washing of the resin and sorption of microparticles of impurities on the surface of air bubbles, and then through caps partition 5. Water leaves the filter through the upper pipe 8. Inert 3 and resin 2 are pressed against the partition 5, however, the size of the slots of its caps prevents the inert and resin from being entrained.

As the experiments showed, the washing performance of the resin of the modified filter in comparison with the unmodified version increases by 20-25%.

Claims (1)

A filtration device comprising a housing in which filtering material and separation devices are arranged in the form of partitions equipped with filter caps, as well as a piping system, characterized in that the lower part of the housing is connected to a compressed air supply line, and an automatic device is installed on the upper housing cover for air release.