CH621491A5 - Appliance for the continuous regeneration of spent ion exchanger material - Google Patents

Description

The present invention relates to a device for the continuous regeneration of exhausted ion exchange material.

Ion exchange material is used to treat liquids laden with pollutants. As is known, this ion exchange material has only a limited ability to absorb pollutants. When it is exhausted, it needs to be regenerated.

If it is an acidic ion exchanger, regeneration is carried out with acid, e.g. B. hydrochloric acid or sulfuric acid. If it is a basic ion exchanger, the regeneration is carried out by an alkali, e.g. B. sodium hydroxide solution or ammonia solution, the ion exchange material consisting of plastic.

Regenerating an ion exchange material is chemically the equivalent exchange of ions, e.g. B. in the acidic exchanger of Na-Io-nen for H ions and in the basic exchanger of Cl ions for OH ions.

The device according to the invention is characterized by an ion exchange column with an exchanger bed located within the hollow body and a plurality of tubes running from the two longitudinal end regions of the hollow body against the exchanger bed, the inner ends of which have recesses and adjoin solid rods which lie in the region of the exchanger bed and whose outer ends are liquid-tight are connected to intermediate plates, through an inlet port at one end and an outlet port at the other end of the hollow body for the inflow and outflow of the regeneration and dilution water, and through an inlet line for the exhausted ion exchange material at one end of the column and an outlet line for the regenerated ion exchange material at the other end of the column, the outlet line being connected to inner tubes which are guided centrally in the tubes running into the exchanger bed and which open into recesses in front of the exchanger bed.

An exemplary embodiment of the device according to the invention is described below with reference to the schematic drawing.

Fig. 1 shows the entire device in longitudinal section, and

FIG. 2 shows a section along the line II-II in FIG. 1.

The ion exchange column essentially consists of the cover 1, the hollow body 2, the base 3, the upper intermediate plate 4 and the lower intermediate plate 5. The distribution tubes 6 are connected to the collecting tubes 8 via solid rods 7. The free ends of these tubes 6 and 8 are connected to the intermediate plates 4 and 5 in a liquid-tight manner. In the distribution pipes 6, recesses 9 and recesses 10 are arranged on their lowermost parts. The inner tubes 11 are arranged centrally in the distribution tubes 6 and begin in the recesses 10. In the header tubes 8, recesses 12 are arranged on their uppermost parts. The compact ion exchanger bed is subdivided into the exchanger bed section 13, which is designed as a boundary layer, the bed section 14, which is designed as a treatment layer, and the bed section 15, which is designed as a transport layer. The inner tubes 11 preferably open into this cover 1 and are combined in a line 17. The water flows out again via a drain connection 18. From this nozzle 18, a line 19 branches off via a pump 20 into a line 21, which opens as a line 22 into the space 24 formed from the distributor plate 23 and the intermediate plate 5.

The device works as follows:

The regeneration and dilution water flows via the inlet connection 16 into the space formed by the cover and the intermediate plate 4 and reaches the boundary layer bed section 13 via the distribution pipes 6 through the recesses 9. These recesses 9 can either be above the exchanger bed section 13 or at least partially be arranged within the bed section 13. The regeneration and dilution water flows through the second bed section 14, which is designed as a treatment layer, enters the collecting tube 8 through the recesses 12 and enters the space formed from the base 3 and the intermediate plate 5 and is drained off again via the line or drain connection 18. From this discharge connection 18, a partial flow is combined via line 19 through the pump 20 with a partial flow of line 21 and passes via line 22 together into the space 24 formed from the intermediate plate 5 and the distributor plate 23 the exhausted ion exchange particles are continuously conveyed into the ion exchange column. This exhausted ion exchange material is carried to the third bed section 15 from below. The distributor plate 23 can be designed as a perforated or solid plate which is provided with openings for the header tubes 8. In the case of a massive design of the distributor plate 23, the openings for the header pipes 8 must be made so large that the

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ion exchange particles can be passed. The regenerated exchange material is discharged from the device via the recesses 10 through the inner tubes 11 and the line 17. The inner tubes 11 begin either above and / or below the recesses 9 5 in the recesses 10.

The advantage of the described device is that it can be used to continuously regenerate ion exchange material and that the treatment takes place in a so-called compact-free floating bed, the material, due to the pressure differences in the individual bed sections, counter to the flow of the regeneration and dilution water is moved. A large amount of equipment and additional auxiliary devices are not necessary.

The exemplary embodiment provides that the regeneration and dilution water are supplied from above and the exhausted ion exchange material from below. There is also the possibility of redesigning the device so that, conversely, the regeneration and dilution water is supplied from below and the exhausted ion exchange material from above. Of course, this means that the other connections have to be changed accordingly.

1 sheet of drawings

Claims (2)

621 491 2 PATENT CLAIMS 1. Device for the continuous regeneration of exhausted ion exchange material, characterized by an ion exchange column with an exchange bed (13, 14, 15) located inside the hollow body (2) and several of the two longitudinal end regions of the hollow body (2) against the exchange bed ( 13, 14, 15) running tubes (6, 8) whose inner ends have recesses (9 or 12) and border on solid rods (7) which lie in the region of the exchanger bed and whose outer ends are liquid-tight with intermediate plates (4, 5) are connected by an inflow pipe (16) at one end and an outflow pipe (18) at the other end of the hollow body (2) for the inflow or outflow of the regeneration and dilution water and through an inlet line (21, 22) for the exhausted Ion exchange shear material at one end of the column and an outlet line (17) for the regenerated ion exchange material at the other end of the column, the outlet line (17) having inner tubes ( 11) is connected, which are guided centrally in the tubes (6) running into the exchanger bed (14) and which open into recesses (10) in front of the exchanger bed. 2. Device according to claim 1, characterized by a cover (1) and a bottom (3) on the hollow body (2), the lid (1) with the influent connector (16) and the bottom (3) with the drain connector (18) is provided for the regeneration and dilution water, through a plurality of distribution pipes (6) leading from the treatment part (14) of the exchanger bed into the space below the cover (1) and several collecting pipes (8) leading from the treatment part (14 ) of the exchanger bed into the space above the floor (3), the individual distribution pipes (6) being connected to each other with the individual header pipes (8) via the solid rods (7), the inner pipes (11) in the distribution pipes (6) are guided and the input line (21, 22) for the exhausted ion exchange material is arranged at the lower end of the column, through recesses (9) on the distribution pipes (6), which are either above the top exchanger bed section (13) or at least partially within di of this bed section.