RU90066U1 - FILTER DEVICE - Google Patents

Abstract

1. A filtration device comprising a housing with nozzles, in which upper and lower distribution devices are located, between which filter material is located, characterized in that a compressed air supply pipe is connected to the housing cover and an inert material is placed in the housing so that between it the lower layer and the upper layer of filtration material has a constant layer of water. ! 2. The filtration device according to claim 1, characterized in that it contains "Granosite IN-60" as an inert material.

Description

The utility model relates to filtration plants for the purification of natural and waste waters, as well as other liquids using ion exchange resins, and can be used in energy, metallurgy, chemical and other industries that use demineralized or softened water in technological processes.

Currently, a large number of filtration plants (filters) of various designs are known for countercurrent ion-exchange water treatment. (RU 2058817, 1995; V.D. Lukin, Yu.L. Emelyanov, Filtering in the chemical industry, L-D, Chemistry, 1982, p. 36-61; L.N. Planovsky, P.I. Nikolayev, Processes and apparatuses for chemical and petrochemical technology, M., Chemistry, 1972, p. 72-88).

Common to all filters is the presence of a housing equipped with upper and lower distribution devices for supplying the liquid to be cleaned and for removing the filtrate, as well as filtering and inert materials placed in it.

Most of the existing methods for pre-treatment of water before ion exchange do not provide clarified water that does not lead to contamination with suspended solids of ion-exchange resins (mainly cation exchangers). Cleaning the upper layer of cation exchanger in known filter designs is carried out by an upward flow of washing water for 3-5 minutes, while the entire load rises quickly to contact with an inert material and is compacted. In other designs, the cleaning of a part of the filter material is carried out by loosening washing in another container, after hydroloading from the filter.

In the first case, even the use of a water-air cleaning method does not always give a positive result, since a small free space between the filter and inert material eliminates the expansion of the filter load necessary for washing. In the second case, an additional flushing system with a capacity is needed, equipment downtime associated with hydraulic overloads and significant water consumption occur.

Closest to the claimed technical solution is the installation for water purification (RU 2058817, 1995), which is a casing with nozzles and upper and lower distribution devices, in which the ion-exchange resin is placed.

The disadvantage of the installation is the lack of cleaning efficiency, due to the fact that the upper layers of the filtration material are in contact with air, dry and are not fully used in ion exchange, as well as the incomplete use of the filter volume

The technical problem solved by the authors was the modification of the filtration device in such a way as to ensure a more complete use of the filtration material and better quality of regeneration by reducing the feed rates of the washing and regenerating solutions.

The technical result was achieved by equipping the filter housing cover with a nozzle for supplying compressed air and placing an inert material in the housing above the surface of the ion exchange resin (IS) in such a way that a constant water layer was maintained between its lower layer and the upper layer of the IS. The best results were achieved when used as an inert material, it contains "Granosit IN-60".

General view of the filtration device "Granofil" is shown in figures 1-4, where the following notation is introduced:

1 - upper switchgear (ASU);

2 - pipe for supplying compressed air;

3 - inert material;

4 - water layer

5 - filter loading - (ion-exchange resin-ion exchanger);

6 - lower switchgear (NRU);

7 - filter housing. The duty cycle diagram is shown in figures 1-4.

Figure 1 shows the state of the filter at the end of the regeneration cycle. Water is supplied from top to bottom through ASU 1. Ionite 5 is depleted. The water layer 4 is increased, which allows for increased loosening of the IS at the washing stage.

Figure 2 shows the stage of backwashing. Water is supplied from the bottom up through the switchgear 6 with a linear speed of 3-7 m / h. IP 5 first loosens in the upper layers without mixing the lower layers. In this case, the upper layers are washed more efficiently when washing with a seal, because the distance between the granules is minimal and they do not “clamp” pollution particles between themselves.

Figure 3 shows the stage of regeneration. Compressed air is supplied through the nozzle 2, which ensures that the IS 5 is pressed against the switchgear 6. The pressure is selected so that water is not displaced from the inert material layer 3. The regeneration solution is supplied from the bottom up through the switchgear 6 with the most efficient regeneration rates.

Figure 4 shows the stage of direct washing before turning on the filter, which coincides with the operation of the water treatment plant.

The use of the claimed technological scheme allows to reduce the speed during backwashing and skipping the regeneration solution, to carry out regeneration with linear speeds of working solutions of 3-7 m / h, which is impossible with traditional technologies.

Claims (2)

1. A filtration device comprising a housing with nozzles, in which upper and lower distribution devices are located, between which filter material is located, characterized in that a compressed air supply pipe is connected to the housing cover and an inert material is placed in the housing so that between it the lower layer and the upper layer of filtration material has a constant layer of water. 2. The filtration device according to claim 1, characterized in that it contains "Granosite IN-60" as an inert material.