DE20320452U1 - Reaction vessel, for cleaning water charged with ozone, has bundles of concentric reaction tubes to give a long dwell time for the dissolved ozone to react with water impurities - Google Patents

Abstract

The reaction vessel (1), for the treatment of water containing ozone, has an inflow (10) for the water charged with ozone and an outflow (30) for the cleaned water. The ballast air containing residual ozone is extracted. Concentric reaction tubes (12-14) are within the vessel, to define the path for the ozone-rich water and give the reaction between the ozone and water impurities. The reaction tubes are gathered into a reaction bundle (7), with an entry opening into the leading reaction channel (20a). After passing around the first deflection point (24a), the water flow is reversed in a second channel (20b) against the direction in the first channel path.

Description

The present invention relates to a reaction vessel for processing of water, especially drinking or swimming pool water, with ozone with an entry for ozone-containing water, an outlet for purified water and an outlet for possibly ballast air containing residual ozone. Such reaction vessels can in Drinking water or swimming pool water treatment systems used be used to break down organic substances, bacteria and others Impurities ozone is added.

In the ozone disinfection of swimming pool water the ozone becomes the circulated Main stream or a sub-stream of swimming pool water usually added in a concentration of about 1 to 1.2 g / m³ and passed into a reaction container. Over a ventilation system become gaseous Residual ozone and ballast air removed. Here, the ozone becomes carbon dioxide in an activated carbon filter implemented so that the exiting air is free of ozone. The rest, dissolved in water Ozone, which does not react with organic substances is or has otherwise been degraded, is outside of the reaction vessel an activated carbon filter system eliminated so that the swimming pool supplied Water is essentially free of ozone.

With one in the DE 100 22 093 A1 described process is dispensed with an activated carbon filter system and only a partial water flow is exposed to ozone. The partial water flow is returned to the main water flow after the reaction section and is diluted by the latter. A regulation regulates the ozone input into the partial water flow so that the residual ozone content in the swimming pool water is below the permissible limit of 0.05 mg / l.

The previously known reaction vessels for reprocessing drinking and / or swimming pool water are usually kettle-shaped and have an inlet arranged laterally in the lower area for the water to be treated with ozone, one in the upper one Area also laterally arranged outlet for the purified water and an outlet for the removal of gaseous residual ozone and ballast air on. The water to be treated with ozone is cleaned in a pipe in the boiler closed to the boiler bottom guided and enters the inside of the boiler at the bottom of this pipe out. Due to the type of water supply However, there is no homogeneous distribution of the gas bubbles in the one to be purified Water and no intensive mixing of the gas and liquid phases reached so that the aqueous phase to be purified due to a insufficient gas dissolving process only one significantly below the saturation concentration Contains ozone content and the contained impurities only insufficiently degradable. To the others are formed due to the flow velocity and the high density difference between the gas bubbles and the aqueous Uncontrolled phase in the jacket volume of the reaction vessel Turbulence leading to short circuit currents with significantly different Lead ozone levels. Therefore is the watery Phase over seen the cross section of the reaction vessel uneven with ozone loaded so that no representative Measurement sample can be taken, which after determining the ozone content a reliable Control of ozone generation and ozone entry in front of the reaction vessel and thus a reliable scheme of the residual ozone content in the aqueous phase after leaving the reaction vessel.

The object of the invention is therefore a sufficiently long and uniform residence time of the with ozone acted upon and purified water as well as an optimal solution of ozone in the watery Phase to ensure for the most complete possible reaction to reach the ozone with the impurities. Furthermore, a reliable regulation of the residual ozone content in the aqueous phase after leaving the reaction vessel.

According to the invention, this object solved, that in the reaction vessel reaction tubes the flow paths are provided for the define ozone-containing water and in which the reaction between Ozone and the impurities contained in the water to be treated mainly takes place, and that the reaction tubes at least a reaction candle are summarized, followed by an entrance opening the reaction candle is provided with a first reaction channel after a first diversion into an essentially opposite first reaction channel directed second reaction channel passes.

Surprisingly, the reaction vessel according to the invention not only enables an almost complete purification of the water, but also a reliable control of the ozone generation and thus the residual ozone content in the purified water after it has left the reaction vessel. Due to the reaction channels defined by the reaction candles, a uniform residence time of the water to be purified is ensured in the reaction vessel, the residence time being able to be flexibly adapted to the respective requirements by varying the length and / or the diameter of the reaction channels. Furthermore, gas bubbles of undissolved residual ozone and ballast air form in the preferably essentially vertically leading from bottom to top and in the deflection from the first to the second reaction channel, which only form a thin film along the wall surfaces with correspondingly larger water in a thin film Flow velocities can happen. On Due to the large gas / liquid phase boundary resulting from gas bubble formation and due to the turbulence generated due to the locally increased flow velocities, an optimal solution of the ozone in the aqueous phase is achieved, so that in the reaction channels by reaction of the dissolved ozone with the impurities in the ozone to be purified is immediately redissolved and the ozone content of the water to be purified along the flow path almost always corresponds to the saturation concentration. Another advantage of the reaction vessel according to the invention lies in the fact that, due to the uniform flow paths defined in the reaction channels, laminar flow conditions can be set in the jacket volume of the reaction vessel, so that due to the continued consumption of ozone also outside the reaction candles by reaction with those contained in the aqueous phase Contamination in the jacket volume of the reaction vessel, viewed from bottom to top, results in a uniformly decreasing gradient of ozone dissolved in the water. This allows a representative sample to be taken, which is a prerequisite for reliable control of the residual ozone content in the aqueous phase after it has left the reaction vessel.

According to a preferred embodiment of the Invention follows the second reaction channel after a second deflection at least one further, essentially counter the third reaction channel directed third reaction channel provided. This will make the length of through the reaction channels defined flow path inside the reaction vessel and thus the dwell time is increased.

In further development of the invention suggested the reaction channels to train in the transitions from the first reaction channel to the second reaction channel and from the second reaction channel into the third reaction channel by in each case deflected about 180 ° become. this makes possible a compact design of the reaction candles and promotes through the possibility of Formation of gas bubbles in particular in the transition from the first to the second reaction channel, but also in the first and second reaction channels the gas release process.

The reaction candles are preferably made by three concentrically arranged, cylindrical tubes with each other increasing diameter, the internal volume of the first, preferably leading from bottom to top Rohres (riser pipe) the first reaction channel, the jacket volume of the concentrically arranged second tube (inverted tube) with one versus first riser pipe of larger diameter the second reaction channel and the jacket volume of the outer tube (Gegenstülprohr) define the third reaction channel. The graded dimensioning the reaction tubes is selected according to the invention so that the same flow velocities can be achieved, as in the inlet and outlet of the reaction vessel.

In development of the invention the Stülprohr delimiting the second reaction channel on the outside at the entrance opening subsequent Ascending pipe and will be at the entrance opening opposite side closed by a cover plate. Thereby there will be an outflow of the water to be purified from the transition from the first to the second reaction channel prevented and a defined redirection reached.

At the transition from the second to In the third reaction channel, this is achieved in that the the third reaction channel outside limiting mating tube at its entrance opening Side is delimited by a bottom section which is from the first Reaction channel is passed. The outer boundary of the second reaction channel reversing pipe supports preferably about a bottom slit plate on the bottom portion. The bottom slit can radially outward pointing openings show through which the water can flow. Alternatively, it is possible to use radial Provide bridges on which the inverted tube is supported and between which the water can be redirected. Through the bottom slot plate or the webs the deflection of the Flow in the third reaction channel but also at the top of the inverting tube a sufficient distance between the cover plate and the outlet opening of the riser pipe reached.

According to a preferred embodiment of the invention with a threaded portion external thread on, over which the reaction candles in threaded openings in a bottom plate can be screwed in which according to the invention one separates the lower kettle dome from the reaction space. The screwing in the reaction candles in the base plate allow a quick and simple replacement of the reaction candles, for example, if a Defective. Furthermore, this arrangement allows easy conversion of the Reaction vessel, e.g. for extension or shortening the residence time by the reaction candles against correspondingly longer or wider or shorter and thinner Reaction candles are exchanged.

According to the invention, the purified swimming pool water is discharged from the reaction vessel via at least one drain pipe leading to the outlet, which according to a further development of this inventive concept opens into the reaction chamber somewhat above the base plate. If, as is provided in an embodiment of the invention, a plurality of discharge lines are provided, these can be connected to the upper end of the reaction space via an annular connecting channel, for example be connected to a central discharge line leading to the outlet.

According to the invention, the reaction space becomes upward through a plurality of openings Cover plate, for example a perforated plate or the like, from an upper boiler dome separately, in which a vent is provided is. about this can remove ballast air, which may still contain residual ozone, from the Reaction vessel are removed.

In further development of the invention the gas / water mixture over a horizontally arranged 45 ° angle introduced into the lower boiler dome. This will make the liquid volume a twist imposed on the most even distribution possible causes the ozone gas / ballast air bubbles in the water and the greatest possible phase boundary between gas and fluid.

The invention is described below of an embodiment and the drawing explained in more detail. there form all described and / or illustrated features for themselves or in any combination, the subject of the invention, regardless of their summary in the claims or their relationship.

Show it:

1 2 shows a schematic longitudinal section of the reaction vessel according to the invention for purifying swimming pool water with ozone,

2 a schematic partial section through a reaction candle used in the reaction vessel in an exploded view above a nozzle plate and

3 a plan view of a bottom slot plate.

How out 1 is the kettle-shaped reaction vessel 1 into a lower boiler dome 2 for the entry and homogenization of the swimming pool water exposed to ozone, a central, essentially cylindrical reaction space 3 , in which the reaction of the ozone with the impurities in the pool water to be cleaned mainly takes place, as well as an upper boiler dome 4 divided to separate the gas mixture from ballast air and residual ozone from the purified swimming pool water.

The lower boiler dome 2 is from the reaction space 3 over a base plate 5 separated, in which a variety of threaded openings 6 for unscrewing reaction candles 7 is trained. The reaction space is at the top 3 to the upper boiler dome 4 open.

In the lower boiler dome 2 is below the bottom plate 5 a side entry 10 provided that with an essentially horizontally arranged angle piece angled by approximately 45 ° 11 is connected to pool water contaminated with ozone in the lower boiler dome 2 introduce. Due to the essentially tangential introduction of the swimming pool water into the lower boiler dome 2 a twist is imposed on the water, which achieves an even distribution of the gas phase in the aqueous phase and thus the greatest possible gas / liquid phase boundary.

The reaction candles 7 consist in the illustrated embodiment of three vertical, concentrically arranged and slipped reaction tubes, namely a riser 12 , an inverted tube 13 and a counter tube 14 , However, it is possible, depending on the requirement, on the counter-thread 14 to do without or to put additional reaction tubes with alternating upper / lower deflection on top of one another in a corresponding manner.

The reaction candle 7 has a bottom portion 15 on that over a threaded section 16 with an external thread in one of the threaded openings 6 the bottom plate 5 is screwed in. The sealing of the reaction space 3 across from the lower boiler dome 2 here is a circumferential seal 17 reached that at the bottom of the bottom section 15 in an annular groove 18 is arranged and against the bottom plate 5 is applied. Alternatively, the ring groove 18 in the bottom section 15 be dispensed with and instead a seal between the external thread 16 and internal thread opening 6 with a process-compatible sealing aid, e.g. a PTFE sealing tape. The bottom section 15 has a central entry opening 19 on that in the threaded opening 6 the bottom plate 5 transforms.

At the entrance opening 19 of the bottom section 15 that concludes in the reaction candle 7 centrally located riser pipe 12 that a first reaction channel 20a defines, which leads from the bottom of the boiler essentially vertically upwards.

Via the riser pipe 12 is from above by a possibly profiled cover plate 21 closed inverted tube 13 turned over, which has a larger diameter than the riser pipe 12 , so that between the outer surface of the riser 12 and the inside surface of the inverted tube 13 a second reaction channel 20b is formed. The inverted tube 13 is supported, for example, by a profiled base slit plate 22 on the bottom section 15 the reaction candle 7 from.

In the 3 bottom slot plate shown 22 has radial slots or openings 23 on that via radial support webs 33 for the inverted tube 13 be separated. In the support bridges 33 are grooves 34 to hold the inverted tube 13 educated. Instead of the bottom slot plate 22 can also only radial webs on the bottom portion in a further embodiment 15 be provided on which the inverted tube 13 supported. The bottom slit 22 or the radial webs can instead of in 3 shown grooves 34 Have paragraphs over which the inverted tube 13 can also be positioned exactly.

Together with the appropriate dimensioning of the inverted tube 13 thereby he is enough that the cover plate 21 at a distance above the top of the riser 12 is arranged so that the flow over a first deflection 24a from the riser pipe leading upwards 12 through 180 ° into the downward-facing inverted tube 13 is redirected. Likewise, at the lower end of the inverted tube 13 which through the bottom slot plate 22 a distance from the bottom section 15 the reaction candle 7 has a second deflection of the flow from the second reaction channel 20b reached.

Around the inverted tube 13 is a mating tube 14 arranged with a larger diameter, so that between the outer surface of the inverted tube 13 and the inner surface of the mating tube 14 a third reaction channel leading upwards 20c is formed. This causes the second redirection 24b again deflected the flow by 180 °. At the upper end of the mating tube 14 the flow enters the reaction space 3 out.

The mating tube 14 is about one at the bottom section 15 provided nozzle 25 or the like. and precisely positioned. Thus, exact dimensioning of the reaction channels 20b . 20c and thus guarantees defined flow conditions.

In the reaction room 3 are also several, in particular four, discharge pipes designed as dip pipes 26 provided which at its lower end, slightly above the bottom plate 5 for example, slanted entry openings 27 exhibit. The discharge lines 26 are at their upper end via, for example, an annular or rectangular connecting channel 28 merged and to a central discharge line 29 connected, which to an exit 30 leads to purified water. Finally is on the upper boiler dome 4 a container lid 31 to accommodate a gas and degassing unit 32 intended for ballast air and possibly outgassed residual ozone.

In the reaction vessel 1 are several reaction candles 7 For example, arranged in a circle or evenly distributed. The number and size of the reaction candles 7 depends on the cross-sectional area of the partial flow line for water purification leading to the entry 10 of the reaction vessel 1 leads, and their relationship to the cross-sectional area of the riser 12 from.

The reaction vessel according to the invention 1 is structured essentially as described above. Its operation and functioning are explained below.

During the operation of the reaction vessel 1 flows over the inlet at a pressure of generally 0.5 to 2.5 bar 10 Swimming pool water to be continuously purified and exposed to ozone, i.e. a mixture of swimming pool water to be purified with dissolved ozone and a gas phase from undissolved ozone and air, via the contra-angle handpiece 11 in the lower boiler dome 2 on. Due to the resulting turbulence, the best possible mixing of the gas-liquid mixture is achieved, so that the gas bubbles from gaseous ozone and ballast air are essentially evenly distributed in the aqueous phase and a maximum phase boundary is formed between the two phases.

The homogeneous two-phase mixture then passes through the threaded openings 6 and the subsequent entry openings 19 into the individual reaction candles 7 and first flows through the in the riser 12 trained first reaction channel 20a from the bottom up. When flowing through, one of the dwell time in the first reaction channel reacts 20a dependent proportion of the dissolved ozone with the impurities in the swimming pool water, whereby a proportion of dissolved ozone in the swimming pool water is consumed. In the redirection 24a between the first and second reaction channels 20a . 20b and later along the length of the reaction channel 20a distributed, form within a short time after commissioning the reaction vessel 1 Gas bubbles from residual ozone and air, so that the aqueous phase the gas bubbles, especially at the deflection 24a can only pass as a thin fluid film along the wall surfaces. Due to the resulting higher flow velocity of the fluid flow film in this area, local turbulence results which favor the gas dissolving process. At the phase boundary, therefore, further ozone is released from the gas bubbles in the water phase, as a result of which the ozone content in the swimming pool water ideally again reaches the saturation concentration. Furthermore, in the reaction channel 20a Due to the local turbulence, small gas bubbles are entrained by the aqueous phase, which further promotes the gas dissolving process.

The swimming pool water then flows through the second reaction channel 20b top down, at the second redirection 24b again deflected by 180 ° and finally flows through the third reaction channel 20c from the bottom up. The dimensions of the reaction channels 20a . 20b and 20c are dimensioned so that the residence time of the swimming pool water at the given volume flow in the reaction vessel 1 is between three and seven minutes, preferably about five minutes. This ensures an almost complete reaction of the ozone with the impurities in the swimming pool water. Overall, the reaction candles bring about 7 thus a controlled flow and the intimate contact of swimming pool water and air-ozone mixture with the formation of gas bubbles consisting of ballast air and ozone. Last but not least, this ensures an optimal gas dissolving process, so that an amount of ozone corresponding to the portion consumed by reaction with the impurities is continuously dissolved in the aqueous phase.

After leaving the reaction candles 7 occurs the two-phase mixture in the upper part of the reaction space 3 and the upper boiler dome 4 above, in which the two phases separate due to the different densities. Because of the comparatively large diameter of the reaction vessel 1 and the division of the flow paths into several reaction candles 7 arises in the jacket volume of the reaction vessel 1 in contrast to the reaction vessels known according to the prior art, an essentially laminar flow. Because of these laminar flow conditions and also outside of the reaction candles 7 persistent consumption of ozone by reaction with the impurities contained in the aqueous phase arises in the jacket volume of the reaction vessel 1 outside the reaction candles 7 in the direction of flow, i.e. from the base plate 5 seen from above, an essentially uniformly decreasing gradient of ozone dissolved in the water. This ensures that the aqueous phase over the cross section of the reaction vessel 1 is evenly loaded with ozone, whereby the removal of sample water and subsequent determination of the ozone content in the sample water can be used to regulate the ozone input into the water to be purified in front of the reaction vessel in such a way that exceeding the permitted limit values for residual ozone in the purified swimming pool water is reliably prevented. In the case of the reaction vessels known from the prior art, in which, owing to the turbulent flow conditions, the aqueous phase is not uniformly loaded with ozone over the cross section of the reaction vessel, reliable regulation of the residual ozone content in the aqueous phase is not possible.

The purified swimming pool water is discharged through the drain pipes 26 , the connecting channel 28 and the central discharge line 29 the exit 30 fed and then fed back to the main stream of swimming pool water. The gas phase, consisting of ballast air and unreacted residual ozone, is fed via the preferably automatic aerator 32 from the reaction vessel 1 directed.

1

reaction vessel

2

lower Kesseldom

3

reaction chamber

4

upper Kesseldom

5

baseplate

6

threaded opening

7

reaction candle

10

entry

11

elbow

12

riser

13

reversing pipe

14

Gegenstülprohr

15

bottom section

16

threaded portion

17

poetry

18

ring groove

19

inlet opening

20a - c

reaction channel

21

cover plate

22

Ground slit plate

23

slot

24a, b

redirection

25

Support

26

discharge line

27

inlet opening

28

connecting channel

29

central discharge line

30

exit

31

container lid

32

loading and degassing unit

33

supporting web

34

groove

Claims (19)

Reaction vessel for the treatment of water, especially drinking or swimming pool water, with one-entry ozone ( 10 ) for ozone-containing water, an outlet ( 30 ) for purified water and an outlet for any residual ozone-containing ballast air, characterized in that in the reaction vessel ( 1 ) Reaction tubes ( 12 . 13 . 14 ) are provided to define the flow paths for the ozone-containing water and in which the reaction between the ozone and the impurities contained in the water to be treated takes place primarily, and that the reaction tubes ( 12 . 13 . 14 ) to at least one reaction candle ( 7 ) are summarized, whereby following an inlet opening ( 15 ) the reaction candle ( 7 ) a first reaction channel ( 20a ) is provided, which after a first deflection ( 24a ) in an essentially opposite to the first reaction channel ( 20a ) directed second reaction channel ( 20b ) transforms. Reaction vessel according to claim 1, characterized in that following the second reaction channel ( 20b ) after a second redirection ( 24b ) at least one further substantially opposite the second reaction channel ( 20b ) directed third reaction channel ( 20c ) is provided. Reaction vessel according to claim 1 or 2, characterized in that the reaction channels ( 20a . 20b . 20c ) are arranged essentially vertically. Reaction vessel according to one of the preceding claims, characterized in that the first reaction channel ( 20a ) essentially from the bottom up and the second reaction channel ( 25b ) is essentially flowed through from top to bottom. Reaction vessel according to one of the preceding claims, characterized in that the reaction channels ( 20a . 20b . 20c ) in the redirections ( 24a . 24b ) are deflected by approx. 180 ° each. Reaction vessel according to one of the preceding claims, characterized in that the reaction candles ( 7 ) through three concentrically arranged pipes ( 12 . 13 . 14 ) are formed. Reaction vessel according to one of the preceding claims, characterized in that the second reaction channel ( 20b ) outer limiting reaction tube ( 13 ), which is located at the entrance opening ( 15 ) subsequent, the first reaction channel ( 20a ) defining reaction tube ( 12 ) is placed at the entrance opening ( 15 ) opposite side through a cover plate ( 21 ) is closed. Reaction vessel according to one of claims 2 to 7, characterized in that the third reaction channel ( 2c ) outer limiting reaction tube ( 14 ) at its entrance opening ( 19 ) facing side through a bottom section ( 15 ) which is limited by the first reaction channel ( 20a ) will pass through. Reaction vessel according to one of the preceding claims, characterized in that the second reaction tube ( 13 ) via a bottom slit plate ( 22 ) or the like on the bottom section ( 15 ) supports. Reaction vessel according to claim 8, characterized in that the bottom section ( 15 ) a threaded section ( 16 ) with an external thread. Reaction vessel according to one of the preceding claims, characterized in that between a preferably lower kettle dome ( 2 ) and a reaction space ( 3 ) a base plate ( 5 ) is provided, in which at least one opening ( 6 ) with which the inlet opening ( 19 ) the reaction candle ( 7 ) connected is. Reaction vessel according to claim 11, characterized in that the opening ( 6 ) has an internal thread into which the threaded section ( 16 ) the reaction candle ( 7 ) can be screwed in. Reaction vessel according to one of the preceding claims, characterized by at least one to the outlet ( 30 ) leading discharge line ( 26 ) to drain the purified swimming pool water from the reaction vessel ( 1 ). Reaction vessel according to claim 13, characterized in that the discharge line ( 26 ) slightly above the nozzle plate ( 5 ) in the reaction space ( 3 ) opens. Reaction vessel according to claim 13 or 14, characterized in that a plurality of discharge lines ( 26 ) are provided, which at the upper end of the reaction space ( 3 ) via a connecting channel ( 28 ) with one to the exit ( 30 ) leading central discharge line ( 29 ) are connected. Reaction vessel according to claim 15, characterized in that the connecting channel ( 28 ) is ring-shaped. Reaction vessel according to one of the preceding claims, characterized in that on the upper kettle dome ( 4 ) a gas and degassing unit ( 32 ) is provided. Reaction vessel according to one of the preceding claims, characterized in that the inlet ( 10 ) a preferably horizontal angle piece ( 11 ) through which the ozone-containing water flows into the lower boiler dome ( 2 ) is initiated. Reaction vessel according to claim 18, characterized in that the angle piece ( 11 ) has an angle of about 45 °.