Device and method for treating liquids by means of ozone

Abstract

A device and a method for treating liquids by ozone, including a pipe in which a main flow of the liquid is guided in a flow direction from an inlet to an outlet, an ozone feed point at which ozone can be introduced in gas form into the main flow, and at least two mixers which are located downstream of the ozone feed point, wherein the mixers are arranged at a distance from one another, and wherein at least one reaction zone is formed between the mixers, and wherein the mixers are designed in such a way that they each dissolve only a portion of the ozone in the main flow that has been introduced in gas form.

1 .- 18 . (canceled) 
     
     
         19 . A device for treating liquid by means of ozone, comprising:
 a pipe in which a main flow of the liquid is guided in a flow direction from an inlet to an outlet,   an ozone feed point at which ozone can be introduced in gas form into the main flow, and   at least two mixers which are located downstream of the ozone feed point,   wherein the mixers are arranged at a distance from one another,   wherein at least one reaction zone is formed between the mixers, and   wherein each mixer is configured to dissolve only a portion of the ozone in the main flow that has been introduced in gas form.   
     
     
         20 . The device according to  claim 19 , wherein the mixers are in each case static mixers without any movable parts. 
     
     
         21 . The device according to  claim 19 , wherein ozone is fed into the main flow at just one point. 
     
     
         22 . The device according to  claim 19 , wherein the distance between the mixers and the flow rate of the liquid are selected such that a residence time for a volume of water in one of the reaction zones between leaving one mixer and entering the next mixer is between 0.5 seconds and 30 seconds. 
     
     
         23 . The device according to  claim 19 , wherein the mixers and the reaction zones are arranged in a pipe that is bent in a loop-like manner. 
     
     
         24 . The device according to  claim 19 , wherein the mixers and the reaction zones are arranged in a vertical orientation. 
     
     
         25 . The device according to  claim 19 , wherein a feeding-in of hydrogen peroxide or other reagents is provided. 
     
     
         26 . The device according to  claim 25 , wherein the feeding-in is provided upstream of the ozone feed point. 
     
     
         27 . The device according to  claim 25 , wherein the feeding-in is provided downstream of the ozone feed point between two mixers. 
     
     
         28 . The device according to  claim 19 , wherein a region for irradiation with electromagnetic waves, in particular with UV radiation, is provided between at least two mixers or after the last mixer. 
     
     
         29 . The device according to  claim 19 , wherein a region for irradiation with UV radiation is provided between at least two mixers or after a last mixer. 
     
     
         30 . The device according to  claim 19 , wherein the distance between the mixers and the flow rate of the liquid are selected such that a residence time for a volume of water in one of the reaction zones between leaving one mixer and entering the next mixer is between 1 second and 10 seconds. 
     
     
         31 . A method for treating contaminated liquids in a flow by means of ozone, wherein the ozone is fed in gas form into the flow at one point and then is mixed into the flow in stages by means of mixers following one another in the flow direction, so that an absolute quantity of introduced ozone increases after each mixer until a feed efficiency of more than 95 percent is reached. 
     
     
         32 . The method according to  claim 31 , wherein ozone is fed into the water flow at just one point. 
     
     
         33 . The method according to  claim 31 , wherein a distance between the mixers and the flow rate of the liquid are selected such that a residence time for a volume of liquid in a reaction zone between leaving one mixer and entering the next mixer is between 0.5 seconds and 30 seconds. 
     
     
         34 . The method according to  claim 31  further comprising feeding-in hydrogen peroxide or other reagents into the liquid. 
     
     
         35 . The method according to  claim 34 , wherein the feeding-in takes place upstream of an ozone feed point. 
     
     
         36 . The method according to  claim 34 , wherein the feeding-in takes place downstream of an ozone feed point. 
     
     
         37 . The method according to  claim 36 , wherein the feeding-in takes place in a reaction zone. 
     
     
         38 . The method according to  claim 31  further comprising irradiation with electromagnetic waves between at least two mixers or after a last mixer.