DE1517426C - Device for setting a selectable lowering of the carbonate hardness, especially in magnesia-rich waters - Google Patents

Description

trickled partial water stream c ' the partial stream b' saturated with lime is added.

For the separation of suspended particles, the activated carbon filter 5 is connected to the mixing pot 4 intended.

The efficiency of the trickle 3 is adjusted by regulating the amount of air to be conveyed by the air blower so that the partial flow c ' in the outlet of the trickle 3 still contains a certain amount of carbonic acid. This dissolves so much lime in the mixing pot 4 from the partial flow V added here until the lime-carbonic acid equilibrium is established.

In the embodiment according to FIG. 2, the cation exchanger Ic connected to the raw water flow α is loaded with hydrochloric acid as a regenerating agent with hydrogen ions. When the cation exchanger Ic loaded in this way is converted with lime and magnesium bicarbonates, free carbonic acid is formed in the branched off substreams d and e. The weakly basic anion exchanger 1 is connected to substream d in front of the giant eggs. This binds the anions of the acids released in the cation exchanger in addition to the carbonic acid, so that the salt and nitrate content can be greatly reduced. The other arrangements are the same as in the embodiment described above, so that the reference symbols have been retained.

In the case of the FIG. 3, two anion exchangers are provided, namely a weakly basic and a strongly basic anion exchanger 6 a and 6 b. Since in the strongly basic anion exchanger, in addition to the desired processing effect and the binding of the silica, carbonic acid is also bound, after the weakly basic anion exchanger 6 a, in addition to the branch / to the lime saturator 2, a partial flow g of the desalinated water flow d ' still containing carbonic acid, bypassing the anion exchanger 6 b passed over the giant eggs 3. All three partial flows are then brought together again in the mixing bowl 4, where the partial flows g ' and f react with one another in the sense of the formation of residual hardness. Almost completely de-silicified water is obtained with a residual hardness content that can be adjusted as required.

1 sheet of drawings

Claims (5)

1 2 Claims: l ™ ldxiTch countercurrent treatment with air, the free carbonic acid is removed except for the remainder that 1. Device for carrying out a process for producing the desired carbonate hardness process is required to set a selectable reduction. the carbonate hardness, in particular at max Soaking, with the water above ground, eliminating the total magnesia hardness passed an acidic cation exchanger, which and other undesirable components in the water to make free carbon dioxide in a giant egg on the other hand and at the same time the invention electricity is removed with air and the desired Kar device can be used almost universally. One can bonathhardness produced by adding lime io with the Rieseler-Kalkmisch-device unit according to the becomes and in the giant eggs by setting the air main patent the most diverse combinations the carbon dioxide is removed, which hits and which have not been treated for a long time to produce the desired carbonate effect with relatively little effort degree of hardness is required, and achieve the water. So can according to the invention at least finally to be provided with one for binding the still 15 two raw water partial streams, the existing acids required amount of lime giant eggs in a first substream and the lime treated is, according to patent 1253182, is arranged more saturated in a second substream characterized in that at least one mixing tank for reuniting the two raw water partial flows are provided, with partial flows being connected downstream. the giant eggs (3) in a first substream and the ao Da in the intended cation exchanger also the Lime saturator (2) is split in a second partial stream, non-carbonate hardness, are next to the is arranged and a mixing container (4) for re-carbonic acid also in exchange from the acid association downstream of the partial flows. residual mineral acids formed in the water 2. Apparatus according to claim 1, characterized in that the lime mixer which is already present is too indicates that 45 salts are bound in the first substream (α, c), which are not further disruptive the giant eggs (3) are a strongly acidic cation. exchanger (1 b) is connected upstream. Further advantageous circuit arrangements are 3. Apparatus according to claim 1, characterized in that the Rie characterizes in the first partial flow, that before the branching off of the raw eggs a strongly acidic cation exchanger pre-water partial flows a strongly acidic cation is eliminated. It can also be provided that before the exchanger (1 c) is arranged. Branch of the raw water partial streams a strongly acidic one 4. Device according to claims 1 and 3, cation exchanger is arranged. This is characterized by the fact that the strongly acidic cation exchanger (Ic) that can be obtained before the branching off of the water is completely free of the disruptive Ma partial flows, a weakly basic anion-exchange compound, which is followed by the brewery exchanger (6a) is and the desalinated z. B. the bitterness and poor foaming water in the outlet of the anion exchanger in the beer is returned and which is also divided into three sub-streams (d, g, f) , of which the first over the giant eggs (3), the second over are to be made verbatim. a strongly basic anion exchanger (6 b) 40. and the third run through the lime saturator (2) see that the strongly acidic cation exchanger is, and a mixing tank (4) for the reunification before the branching of the partial flows a weakly supply of the three partial flows is connected downstream. sic anion exchanger is connected downstream and 5. Apparatus according to claim 1 to 4, that the desalinated water passes through the outlet of the anion characterized in that it is divided into three substreams after the mixer 45, one of which container (4) a cleaning filter (5), for. B. an active - the first over the giant eggs, the second over one carbon filter (5) is provided. strongly basic anion exchanger and the third is passed through the lime saturator, and a mixing tank to reunite the three partial flows 50 is connected downstream. Finally, after the mixing ; container or a cleaning filter, z. B. an active carbon filter, be provided. The invention relates to a device for through- Further advantages of the invention emerge from Implementation of a method for setting a selection of the following description, in which Ausbaren lowering of the carbonate hardness, in particular 55 management examples on the basis of drawings for magnesia-rich waters, where the waters are explained above. Herein shows an acidic cation exchanger, the free Fig. 1 is a circuit diagram of a softening system, Carbon dioxide in a giant egg in countercurrent with Fig. 2 a circuit diagram of a partial desalination Air removed and the desired carbonate hardness and is made by adding lime and where 60 F i g. 3 a circuit diagram of a fully demineralized animal Lay giant eggs by adjusting the air flow. that carbon dioxide is removed that is not used for the water softening system according to FIG. 1 consists of Setting the desired degree of carbonate hardness is required both in parallel in the raw water flow α and then exchanging the water with a switched strongly acidic regenerated cations la and Ib, the amount of lime required in the acidic process b. In this see lime saturator 2 and the process described in the acidic sequence c in the main patent, the arranged giant eggs 3 is partially desalinated with controllable air total raw water and the acidic vent 3 a and the mixing pot 4, in which the