RU21912U1 - WATER TREATMENT PLANT - Google Patents

Description

WATER TREATMENT PLANT

The 11 useful model relates to installations for the purification 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 that use demineralized or softened water in technological processes.

Currently, a large number of filtration plants 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 drift filters, filter presses, etc. (V.D. Lukin, Yu.A. Emelyanov, Filtration in the chemical industry, Ld, Chemistry, 1982, p. 36-61, pat RF №2058817, 1995, class С02Р 1/42, A.N. Planovsky, P.I. Nikolaev, Processes and apparatuses of chemical and petrochemical technology, M., Chemistry, 1972, p. 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

11rototype of the claimed technical solution is a device for the most effective method of purifying filtering water through a layer of ion-exchange resins (US Pat. RF No. 2058817, 1995, class S02P 1/42). The installation is a housing with nozzles and upper and lower switchgears containing ion-exchange resin.

The disadvantage of the installation is the lack of cleaning efficiency associated with clogging of the filter material with impurities, as well as the duration and insufficient efficiency of the processes of restoring the properties of the resin in a “clamped layer of ion exchanger.

MK.S02P 1/42

The problem solved by the author was to improve the water purification system by, on the one hand, dividing the process into “coarse (preliminary) and“ fine (final) filtration, and on the other hand, carrying out the process of regeneration and washing of the ion exchanger in the “unpressed mode”.

This problem was solved by placing in the housing along with the ion exchanger a layer of filter material with a density lower than the density of water so that in the housing above the surface of the filter material remains free of particles; sorbents (ion exchange resin and filter material) space.

The general installation diagram is shown in FIG. 1-4 where shown

11, the following designations are introduced in the drawings: I-top switchgear (ASU);

2-layer floating filter material (PFM);

3 free space;

4-layer ion exchanger;

5-lower switchgear (switchgear).

6-body installation

7-pipe

The regeneration process is as follows. In the housing 6 of the filtration installation for water purification load ion-exchange resin 4 and PFM 2.

The general process diagram is shown in FIG. 1-4, where in FIG. 1 shows a filtration duty cycle, FIG. 2 shows a stage of clamping an ion exchanger layer, supply of reagents and their displacement, FIG. 3 shows a deposition stage, and FIG. 4 illustrates a washing stage of a system.

During the working cycle (Fig. 1), the purified water enters the filter from above through the pipe 7, passing sequentially through the ASU 1, PFM 2, the free space 3, the layer of ion exchanger 4, the ASU 5, and then is removed from the filter through the lower pipe 7.

11 - this is the coarsest part of the impurities that is retained by the PFM and remains in the upper part of the casing without contaminating the ion exchanger 4, on which, along with the post-treatment of the liquid from suspensions, water softening processes take place.

.But depletion of the exchange capacity of the resin layer (completion of the working cycle), the flow of the processed liquid into the ion-exchange filter is stopped in the top-down direction and the regeneration process is started (Fig. 2). In this case, the PFM layer 2 is pressed against the switchgear 5, and the free space zone 3 is located in the apparatus above the ion exchanger layer 4. 11, when carrying out the ion exchanger regeneration process (Fig. 2), a water flow is pulsed in the bottom-up direction, which raises the entire ion exchanger layer 4 without intralayer mixing, pressing it to

11FM 2, at the same time ensuring the removal of suspensions from 11FM and ion exchanger that accumulated during the working cycle.

Then, in the direction from bottom to top, a flow of a regenerating solution is supplied, which, passing through the layer of ion exchanger 4, carries out its chemical regeneration, keeping the layer of ion exchanger 4 in a clamped state.

Upon completion of the regeneration, the operation of displacing the remnants of the regenerating solution from the clamped layer of the ion exchanger is carried out, supplying a stream of water in the direction from below. I IOTOK water for displacement can also be supplied in continuous or pulsed mode.

At the next stage, the deposition operation is carried out (Fig. H), for which the flow of process flows to the ion-exchange apparatus is turned off, and the layer of ion exchanger 4 under the influence of gravity laminarly (uniformly, without intralayer mixing) settles on the switchgear 5. In this case, the free space zone 3 migrates from switchgear 5 to 11FM 2.

The last operation is the washing (figure 4), carried out in the same direction as the treatment of the source water in the work cycle.

One test was carried out on the basis of a filtration unit with a capacity of 0.5 cubic meters, where 0.45 cubic meters was loaded. m type resin based on a styrene-divinylbenzene matrix in sodium form with a total exchange capacity of the resin of at least 2.2 g-eq./l and 0.02 cubic meters. m balls based on polyurethane foam.

11, depletion of the exchange capacity of the resin layer (completion of the working cycle) stopped the flow of treated water into the ion-exchange filter from top to bottom and started the regeneration process. For this, part of the purified water was supplied under the resin layer in the direction from the bottom to the top over a wide range of time and pressure. .

Then, the water supply was stopped and a regeneration solution based on sodium chloride was supplied.

11, at the end of the chemical regeneration of the layer, the residues of the regenerating solution were displaced by the flow of demineralized water supplied from the bottom to the top. Then, the water supply was stopped, as a result of which gravitational deposition of the resin layer occurred. Osevpgay resin layer was washed with a stream of treated water in the direction from top to bottom, simultaneously clamping it, after which the next working cycle of water purification was carried out.

The experiments conducted on a typical chemical water treatment plant using prototype technology (with an average productivity of 150 cubic meters per hour and a filter cycle volume of 12,000 cubic meters), when replacing the filter system with the claimed one, showed that it was possible to increase the volume of CLEANING water to a mafia breakthrough rate of 100 μg / l on average by 5-8% cubic meters, and the life of the ion exchanger - by 15-20%.

FORMULA OF A USEFUL MODEL.

Installation for water purification, comprising a housing with nozzles and upper and lower distribution devices, in which an ion-exchange resin is placed, characterized in that the filtering material is additionally placed in the housing with the possibility of movement in the housing with a density lower than the density of water, and above the surface of the material in the housing there is space free from sorbents.

Claims (1)

Installation for water purification, comprising a housing with nozzles and upper and lower distribution devices, in which an ion-exchange resin is placed, characterized in that the filter housing is additionally placed with the possibility of moving in the housing filter material with a density lower than the density of water, and above the surface of the material in the housing there is space free from sorbents.