JP6495626B2 - Water treatment system and mixed liquid generator - Google Patents

Description

Embodiments described herein relate generally to a water treatment system and a mixed liquid generation apparatus .

When gas is mixed with liquid in a general water treatment system, the gas to be mixed from the diffuser (diffuse cylinder or diffuser plate and piping) installed at the bottom of the tank structure into which the water to be treated is introduced is at a pressure higher than atmospheric pressure. The gas-liquid two-phase mixing was performed by supplying as fine bubbles and mixing in the water to be treated.
As a result, the gas is dissolved in the water to be treated and various chemical reaction treatments are performed as a result. In general gas-liquid mixing, fine bubbles are used to extend the gas hold-up time, and the gas and liquid are mixed in countercurrent so that the gas and the water to be treated collide with each other.

JP 2010-22916

  However, in the conventional technology, after operation of the water treatment system, consumption due to pressure rise to supply gas from clogging due to the influence of inorganic matter / organic matter adhering to the diffuser cylinder or diffuser plate which is the part that blows out gas Due to the increase in electric power, the decrease in the gas-liquid contact area due to the increase in the bubble diameter and the shortening of the gas hold-up time, the gas-liquid mixing efficiency has been significantly reduced.

  Moreover, when it becomes necessary to supply ozone gas by the deterioration of the water quality in a water tank, it is desired to improve ozone quality by supplying ozone immediately.

The present invention has been made in view of the above, and can suppress clogging due to the influence of inorganic substances / organic substances, improve the gas-liquid mixing efficiency, and can quickly improve the water quality when the water quality deteriorates. It aims at providing the water treatment system and mixed liquid production | generation apparatus which can aim at improvement of this.

Water treatment system embodiment, the ozone gas supplied to generate ozone mixed liquid microbubbles solution was mixed with conveying liquid in the bubble shape, Ru is disposed within the process water tank for water to be treated Ru housed pipe feeding said ozone mixed liquid to the treatment water tank via the mixing liquid generation device is contacted with the water to be treated separately from the said liquid mixture generating device, ozone, Ru disposed in the processing water tank And an ozone supply device that supplies fine bubbles through a diffuser.

FIG. 1 is a schematic configuration block diagram of a water treatment system according to the first embodiment. Drawing 2 is a top view of piping arrangement explanation in a treated water tank in a 1st embodiment. FIG. 3 is a schematic configuration block diagram of a water treatment system according to the second embodiment. FIG. 4 is a schematic configuration block diagram of a water treatment system according to the third embodiment. FIG. 5 is a schematic configuration block diagram of a water treatment system according to a modification of the third embodiment. FIG. 6 is an explanatory diagram of another modification of the third embodiment. FIG. 7 is a schematic configuration plan view of a nozzle portion of still another modified example of the third embodiment.

  Next, embodiments will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic configuration block diagram of a water treatment system according to the first embodiment. Drawing 2 is a top view of piping arrangement explanation in a treated water tank in a 1st embodiment. In FIG. 2, only the piping 15 and the opening 15A of the first supply system are shown, and the piping 42 and the dispersion cylinder 42A are not shown.

  The water treatment system 10 supplies ozone to the treated water tank, and includes two systems, a first supply system and a second supply system, as the supply system. Moreover, the water treatment system 10 of this embodiment is provided with two treated water tanks, the treated water tank 14F of the front | former stage, and the treated water tank 14B of the back | latter stage, as shown in FIG. 1, and each treated water tank 14F, 14B is connected. And each treated water tank 14F and 14B is comprised so that the supply of ozone from 2 systems may each be received. The structures of the treated water tank 14F and the treated water tank 14B are the same. Here, when the treated water tanks 14F and 14B are not distinguished, they are referred to as treated water tanks 14. Although not shown in FIG. 1, a water tank for performing biological activated carbon treatment on the water to be treated discharged from the subsequent treatment water tank 14B is connected to the further latter stage of the latter treatment water tank 14B. Yes.

  As shown in FIG. 1, the water treatment system 10 includes a blower 11b, an ozone generator 12b, a water supply pump 13, a microbubble liquid generator 17, and a valve 52 as a first supply system.

  The blower 11b takes in a gas containing air or oxygen as a source gas. The ozone generator 12b discharges into the source gas containing air or the source gas containing oxygen, and generates ozone gas. The water supply pump 13 supplies clean water as a transfer liquid.

  The microbubble liquid generator 17 generates a microbubble liquid (ozone microbubble liquid) obtained by mixing ozone gas supplied to the supplied clean water (conveying liquid) as microbubbles, and the valve 52 is in an open state. In addition, the water to be treated 16 is supplied into the treated water tanks 14F and 14B through the pipes 15 installed therein.

  In the above configuration, as a method for making the ozone gas into microbubbles, for example, a gas-liquid two-phase that entrains ozone gas in a liquid vortex and rotates the vortex at high speed to make the ozone gas into microbubbles by shearing force. The flow swirl method is used.

  In the water treatment system 10 of this embodiment, the 1st supply system employ | adopts the structure which does not provide a diffusion cylinder and a diffuser board. That is, in order to mix ozone gas into the water to be treated, when a diffusion cylinder or a diffuser plate that generates bubbles is provided at the tip of a pipe disposed in the treated water tank, From clogging due to the influence of inorganic and organic substances adhering to the air supply holes, which are the parts to be ejected, increase in power consumption due to pressure increase to supply gas, and decrease in gas-liquid contact area due to increase in bubble diameter By shortening the gas hold-up time, the gas-liquid mixing efficiency is significantly reduced. In order to improve this, it has been necessary to periodically replace the diffuser cylinder or the diffuser plate or perform regeneration by acid cleaning or firing.

  Therefore, in the present embodiment, the first supply system is configured so as not to provide the diffusion cylinder and the diffusion plate, and the supply holes of the diffusion cylinder or the diffusion plate are prevented from being clogged.

  That is, in the 1st supply system, the gas (gas) for processing is not supplied with respect to to-be-processed water, but the liquid (ozone microbubble liquid) containing the gas for processing is connected directly to piping (or piping). Nozzle) is supplied from the liquid supply port (liquid supply hole), so that the diameter of the liquid supply port (liquid supply hole) is larger than the diameter of the air supply hole of the diffusion cylinder or the diffuser plate, and Since the flow rate of the liquid flowing through the liquid supply port (liquid supply hole) is large, the possibility of clogging of the liquid supply port (liquid supply hole) is reduced compared to the air supply hole of the diffusion cylinder or the diffuser plate. Yes.

  In this case, when the configuration of the first embodiment is applied to the conventional water treatment system, the microbubble liquid generator 17 is connected to the pipe without removing the diffuser cylinder or the diffuser plate from the existing pipe. Take the configuration. Thereby, installation cost can be suppressed to the minimum.

  Moreover, the water treatment system 10 is provided with the blower 11a, the ozone generator 12b, and the valve | bulb 51 as a 2nd supply system, as shown in FIG.

  The blower 11a takes in a gas containing air or oxygen as a source gas. The ozone generator 12a discharges into the source gas containing air or the source gas containing oxygen, and generates ozone gas.

  When the valve 51 is open, the ozone generator 12a supplies the generated ozone gas into the water to be treated 16 via the pipe 42 installed in the treated water tanks 14F and 14B. The pipe 42 is provided with a diffuser cylinder 42A (an example of an air diffuser) that generates bubbles at a tip portion thereof. For this reason, ozone gas is supplied into the water 16 to be treated as bubbles by the scattering cylinder 42A. In addition to the diffusion cylinder 42A, a diffusion plate may be used.

  In the water treatment system 10 of the present embodiment, the scattering cylinder 42A is used in the second supply system. As will be described later, normally, ozone gas is supplied from the first supply system to the treated water tank 14, and from the second supply system. Since the supply of ozone gas to the treated water tank 14 is performed when the water quality is deteriorated, it is considered that the frequency of clogging by the scattering cylinder 42A as described above is low.

  Next, operation | movement of the water treatment system 10 of 1st Embodiment is demonstrated. At normal times, ozone gas is supplied from the first supply system into the treated water tank 14. First, the water treatment system 10 closes the valve 51 of the second supply system and opens the valve 52 of the first supply system. The blower 11b of the first supply system takes in air as a source gas and supplies it to the ozone generator 12b. The ozone generator 12 b discharges to air as a raw material gas, generates ozone gas, and supplies it to the microbubble liquid generator 17.

  In parallel with these, the water supply pump 13 supplies clean water as a transfer liquid to the microbubble liquid generator 17. The microbubble liquid generating device 17 generates a microbubble liquid in which ozone gas supplied to the supplied clean water (conveying liquid) is mixed as microbubbles.

  And the microbubble liquid production | generation apparatus 17 supplies the produced | generated microbubble liquid in the to-be-processed water 16 via the piping 15 installed in the treated water tank 14. FIG. As a result, the ozone gas microbubbles in the microbubble liquid form an upward flow.

  On the other hand, the water to be treated 16 supplied from the water inlet of the treated water tank 14 forms a downward flow 16F by the drooping wall (partition wall) 14A formed in the treated water tank 14, and the microbubble liquid and the covered water. The treated water 16 will be liquid-liquid countercurrent mixed.

  Therefore, the ozone gas microbubble OMB reacts with the substance in the water to be treated 16. At this time, as compared with the conventional method of mixing bubbles in the water to be treated, the hold-up time of the ozone gas microbubble OMB is increased by liquid-liquid mixing the microbubble liquid containing the ozone gas microbubble OMB. Can be secured.

  Further, in this case, the pipe 15 is installed so that the opening 15A of the pipe 15, that is, the direction of the liquid supply hole is a gas-liquid countercurrent, and is jetted in a direction opposite to the flow of the water 16 to be treated, generally upward. Is more preferable.

  As described above, ozone gas is supplied into the treated water tank 14 from the first supply system. If the water quality of the treated water 16 in the treated water tank 14 is measured, and the water quality is found to be deteriorated, the treated water tank is further removed. It is necessary to increase the supply amount of ozone gas into the interior 14 to restore the water quality to a good state.

  However, when supplying ozone gas from the first supply system, as described above, it is necessary to supply clean water as a transport liquid in addition to the source gas, or after generating ozone gas from the source gas, Since processing such as generating microbubble liquid from ozone gas and clean water in the bubble liquid generator 17 is necessary, it takes time to increase the supply amount of ozone gas, and measures against deterioration of water quality are delayed.

  For this reason, in the water treatment system 10 of this embodiment, when the water quality of the to-be-treated water 16 in the treated water tank 14 is measured and it is determined that the water quality is deteriorated, not the first supply system, Ozone gas is supplied into the treated water tank 14 from the second supply system.

  That is, when it is determined that the water quality has deteriorated based on the measurement result of the quality of the water 16 to be treated, the water treatment system 10 opens the valve 51 of the second supply system and opens the valve 52 of the first supply system. Closed.

  Then, the blower 11a of the second supply system takes in a gas containing air or oxygen as a source gas and supplies it to the ozone generator 12a. The ozone generator 12a discharges to a raw material gas containing air or oxygen, generates ozone gas, and supplies the generated ozone gas via a pipe 42 installed in the treated water tank 14, thereby dispersing the ozone gas. It supplies in the to-be-processed water 16 from the cylinder 42A as a bubble.

  In this way, in the second supply system, ozone gas is supplied into the treated water tank 14 in the form of bubbles without supplying clean water as a transfer liquid or generating microbubble liquid by the microbubble liquid generating device 17. Therefore, it is possible to supply in a shorter time than the supply of ozone gas from the first supply system.

  Therefore, in the water treatment system 10 of the present embodiment, when the quality of the water to be treated 16 in the treated water tank 14 is deteriorated, the second supply system including the blower 11a, the ozone generator 12a, and the scattering cylinder 42A. By supplying ozone gas into the treated water tank 14 in the form of bubbles, the supply amount of ozone gas can be increased in a short time, and the quality of the treated water 16 in the treated water tank 14 can be improved.

  In addition, according to the present embodiment, the ozone gas is supplied into the treated water tank 14 by the first supply system, so that the gas holdup time is short, so that the unreacted ozone gas (gas) is in the gas phase portion above the water surface. Compared with the conventional aeration method existing in, the amount of unreacted ozone gas can be reduced, and the processing efficiency can be improved.

  As a result, according to the water treatment system 10 of the present embodiment, the ozone gas is supplied into the treated water tank 14 by the first supply system, thereby reducing the electrical energy related to the supply of the treatment gas and the unreacted treatment gas. The capacity of equipment and devices can be expected to be reduced. Moreover, according to the water treatment system 10 of this embodiment, it becomes possible to suppress the maintenance process resulting from clogging or the like by supplying ozone gas into the treated water tank 14 by the first supply system.

  In addition, according to the water treatment system 10 of the present embodiment, by supplying ozone gas into the treated water tank 14 by the first supply system, the concentration of liquid- In liquid mixing, since it supplies as a microbubble liquid, controllability improves by performing quantitative control of a microbubble liquid.

  Moreover, in this embodiment, since the two treated water tanks 14F and 14B are connected in series, the to-be-treated water 16 forms a gas-liquid countercurrent and reflux in each treated water tank 14F and 14B. Liquid-liquid mixing is promoted to achieve complete mixing.

(Second Embodiment)
In the water treatment system 10 of the first embodiment, after supplying ozone gas into the treated water tank 14 by the first supply system, when the water quality of the treated water 16 in the treated water tank 14 deteriorates, the second supply system As a result, the supply amount of ozone gas into the treated water tank 14 was quickly increased.

Here, when ozone is injected into the treated water tank 14 and increased, the increased ozone reacts with bromide ions present in the treated water 16, and bromate ions (BrO ₃ ⁻ ) are by-produced in the treated water 16. It will be generated as a thing. Since bromate ions are also carcinogenic substances, it is necessary to supply a solvent or the like for suppressing the generation of bromate ions into the treatment water tank 14 to suppress the generation of bromate ions. Further, if such a solvent supply path is newly provided separately from the first supply system and the second supply system, the manufacturing cost of the water treatment system increases.

  For this reason, in this 2nd Embodiment, while providing the supply path | route of the solvent for suppressing generation | occurrence | production of bromate ion in a 1st supply system in common with a 1st supply system, reducing manufacturing cost The generation of bromate ions due to the ozone gas supplied when the quality of the water to be treated 16 deteriorates is suppressed.

  FIG. 3 is a schematic configuration block diagram of a water treatment system according to the second embodiment. In FIG. 3, the same parts as those in FIG. Similar to the first embodiment, the water treatment system 30 of the present embodiment includes two systems, a first supply system and a second supply system, as ozone supply systems to the treated water tank 14. Moreover, the water treatment system 30 of this embodiment is also provided with two treated water tanks, the front-stage treated water tank 14F and the latter-stage treated water tank 14B, as in the first embodiment, and the two treated water tanks 14F and 14B are connected in series. It is connected. Here, the configurations of the blower 11a, the ozone generator 12a, the piping 42, the dispersion cylinder 42A, and the valve 51 of the second supply system are the same as those in the first embodiment.

  The water treatment system 30 of this embodiment is different from the first embodiment in the configuration of the first supply system. As shown in FIG. 3, the water treatment system 30 of the present embodiment includes a blower 11b, an ozone generator 12b, a water supply pump 13, a microbubble liquid generator 17, and three supply devices as a first supply system. 31a, 31b, 31c, a blower 33, an oxygen microbubble generator 32, and valves 52, 35a, 35b, 35c, 35d.

  Here, the configuration for supplying ozone gas into the treated water tank 14, that is, the functions and configurations of the blower 11b, the ozone generator 12b, the feed water pump 13, the microbubble liquid generator 17, and the valve 52 are the same as those in the first embodiment. It is the same.

  The supply device 31a takes in ammonia. When the valve 35a is in the open state, the supply device 31a supplies the ammonia that has been taken into the treated water tank 14 through the pipe 15 shared with the supply path of the microbubble solution from the microbubble solution supply device 17.

  The supply device 31b takes in a pH adjuster. When the valve 35b is in the open state, the supply device 31b supplies the taken-in pH adjuster into the treated water tank 14 via the pipe 15 shared with the microbubble liquid supply path from the microbubble liquid supply device 17. .

  Here, ammonia and the pH adjuster are solvents that suppress the formation of bromate ions in the water to be treated 16.

  The blower 33 takes in a gas containing oxygen and supplies the taken-in gas containing oxygen to the oxygen microbubble generator 32. The oxygen microbubble generator 32 generates microbubble oxygen from the supplied oxygen-containing gas, and when the valve 35c is open, the microbubble liquid supply path from the microbubble liquid supply device 17 The water is supplied into the treated water tank 14 through the common pipe 15.

  The supply device 31c takes in hydrogen peroxide. When the valve 35d is in the open state, the supply device 31c supplies the taken-in hydrogen peroxide into the treated water tank 14 through the pipe 15 shared with the microbubble liquid supply path from the microbubble liquid supply device 17. .

  Next, operation | movement of the water treatment system 30 of 2nd Embodiment is demonstrated. At normal times, ozone gas is supplied from the first supply system into the treated water tank 14. At this time, the water treatment system 30 opens the valve 52 and closes the valves 35a, 35b, 35c, and 35d. The procedure for supplying ozone gas from the first supply system into the treated water tank 14 in the normal state is performed in the same manner as in the first embodiment.

  And as a result of measuring the water quality of the to-be-treated water 16 in the treated water tank 14, when it is found that the water quality is deteriorated, the supply amount of ozone gas into the treated water tank 14 is further increased to make the water quality good. Therefore, the water treatment system 30 closes the valve 52, opens the valve 51, supplies ozone from the second supply system into the treated water tank 14, and increases the supply amount of ozone. The procedure for supplying ozone from the second supply system is the same as in the first embodiment.

In this way, when ozone is injected into the treated water tank 14 and the ozone supply amount is increased, the increased ozone reacts with bromide ions present in the treated water 16 to cause bromate ions (BrO _{3) in the} treated water 16. ^- ) Is generated as a by-product.

  For this reason, in the water treatment system 30 of this embodiment, the solvent etc. for suppressing generation | occurrence | production of bromate ion are supplied in the treated water tank 14, and generation | occurrence | production of bromate ion is suppressed. That is, the water treatment system 30 supplies a solvent for making the reaction between bromide ions and ozone less likely to occur in the treated water tank 14 due to an increase in the amount of ozone supplied.

  Specifically, the water treatment system 30 supplies ammonia as such a solvent. That is, in the water treatment system 30, the supply device 31a takes in ammonia. Then, the water treatment system 30 opens the valve 35a (the other valves 35b, 35c, 35d, and 52 are closed), and the supply device 31a puts the taken-in ammonia into the treated water tank 14 through the pipe 15. Supply.

Thus, the water to be treated 16 in the treatment water tank 14, under ammonia coexist, hypobromous acid (HOBr) generates Buromamin (NH ₂ Br), suppress the reaction between hypobromous acid ion and ozone As a result, the production of bromate ions is suppressed.

  Alternatively, instead of supplying ammonia into the treated water tank 14, a pH adjusting agent may be supplied. That is, the supply device 31b takes in the pH adjuster. Then, the water treatment system 30 opens the valve 35b (the other valves 35a, 35c, 35d, and 52 are closed), and the supply device 31b treats the taken pH adjuster via the pipe 15 14 is supplied to lower the pH of the water 16 to be treated.

By reducing the pH of the water 16 to be treated, the concentration of hypobromite increases from the acid dissociation equilibrium of hypobromite and hypobromite ions, and as a result, the production of bromate ions is suppressed. The acid dissociation equilibrium generates Buromamin (NH ₃ Br), to suppress the reaction between hypobromous acid ion and ozone, resulting in the generation of bromate ions can be suppressed.

  Further, since the pH of the water to be treated 16 is lowered, the self-decomposition of ozone is reduced, so that it becomes difficult to generate OH radicals, and as a result, production of bromate ions is suppressed.

  Further, in the water treatment system 30, oxygen or hydrogen peroxide may be supplied into the treated water tank 14. That is, the blower 33 takes in a gas containing oxygen and supplies it to the oxygen microbubble generator 32. In the water treatment system 30, the valve 35 c is opened (the other valves 35 a, 35 b, 35 d, 52 are closed), and the oxygen microbubble supply device 32 supplies microbubble oxygen from the gas containing oxygen. Generated and supplied into the treated water tank 14 through the pipe 15.

  By injecting oxygen into the water 16 to be treated in the treated water tank 14, the dissolved oxygen is increased in the biological activated carbon treatment performed at a later stage of the treated water tank 14 </ b> B, thereby promoting the reaction of the biological activated carbon treatment.

  Further, the supply device 31c takes in hydrogen peroxide. Then, the water treatment system 30 opens the valve 35d (closes the other valves 35a, 35b, 35c, and 52), and the supply device 31c passes the hydrogen peroxide taken in through the pipe 15 into the treated water tank 14. Supply in.

  Hydrogen peroxide is injected into the water to be treated 16 in the treated water tank 14 to perform an accelerated oxidation process (AOP). That is, ozone, hydrogen peroxide, and the water to be treated 16 react with each other in the treated water tank 14 to generate a large amount of OH radicals, and the oxidative power of the OH radicals decomposes the hardly decomposable substance in the water to be treated 16. Promoted.

  As described above, in the present embodiment, when the supply amount of ozone into the treatment water tank 14 increases, the supply path (first supply system) of the microbubble liquid is shared, and ammonia or a pH adjuster is used for the treatment water tank 14. In addition to the effects of the first embodiment, the production of bromate ions due to the ozone gas supplied when the water quality of the water to be treated 16 deteriorates while reducing the manufacturing cost. Can be suppressed.

  Moreover, in this embodiment, since the water treatment system 30 is injecting oxygen into the water 16 to be treated in the treated water tank 14, dissolved oxygen is increased in the biological activated carbon treatment performed in the further stage of the treated water tank 14B. The reaction of biological activated carbon treatment can be promoted.

  In this embodiment, since the water treatment system 30 injects hydrogen peroxide into the water to be treated 16 in the water tank 14, the decomposition of the hardly decomposable substance in the water to be treated 16 can be promoted. .

(Third embodiment)
FIG. 4 is a schematic configuration block diagram of a water treatment system according to the third embodiment. In FIG. 4, the same parts as those in FIG. Similar to the first embodiment, the water treatment system 40 of the present embodiment includes two systems, a first supply system and a second supply system, as ozone supply systems to the treated water tank 14. Moreover, the water treatment system 40 of this embodiment is also provided with two treated water tanks, the front-stage treated water tank 14F and the latter-stage treated water tank 14B, as in the first embodiment, and the two treated water tanks 14F and 14B are connected in series. It is connected.

  Here, the configurations of the blower 11a, the ozone generator 12a, the piping 42, the dispersion cylinder 42A, and the valve 51 of the second supply system are the same as those in the first embodiment. Moreover, the structure of the blower 11b of the 1st supply system, the ozone generator 12b, the feed water pump 13, the microbubble liquid production | generation apparatus 17, and the valve | bulb 52 is the same as that of 1st Embodiment.

  The microbubble liquid generation device 17 of the present embodiment is a nozzle provided in a pipe 15 installed in the treated water tank 14 for the generated microbubble liquid (ozone microbubble liquid) when the bubble 52 is open. 18 to be supplied into the water 16 to be treated.

  In the present embodiment, the microbubble liquid can be ejected from the liquid supply hole 18A of the nozzle 18 in a desired direction, in particular, in an oblique direction of the drooping wall 14A, and short-circuited from the water inlet to the water outlet through a path close to the shortest path. A swirling flow opposite to the flow, that is, the upward flow 16FU can be easily generated, and the efficiency of liquid-liquid mixing can be improved.

  Here, as the ejection angle of the nozzle 18 with respect to the treated water tank 14 and the hanging wall 14A, an effective angle can be arbitrarily selected by fluid analysis.

(Modification of the third embodiment)
In 3rd Embodiment, although the nozzle 18 was applied to the water treatment system 10 of 1st Embodiment shown in FIG. 1, the nozzle 18 is applied to the water treatment system 30 of 2nd Embodiment shown in FIG. May be. FIG. 5 shows a schematic configuration of a water treatment system 50 in which the nozzle 18 is applied to the water treatment system 30 of the second embodiment shown in FIG.

  FIG. 6 is an explanatory diagram of another modification of the third embodiment. As the nozzle 18 described above, as shown in FIG. 6, a nozzle having an opening diameter smaller than the pipe diameter is connected, the discharge speed of the microbubble liquid at the nozzle 18 opening is increased, and the entire treated water tank 14 is more reliably stirred. It can be configured to be able to.

  By adopting such a configuration, the number of pipes for dispersing the microbubble liquid can be reduced.

  FIG. 7 is a schematic configuration plan view of a nozzle portion of still another modified example of the third embodiment. This modification is characterized in that a nozzle unit 19 having the same configuration as the sprinkler for watering is provided at the supply port of the pipe 15 for dispersing the microbubble liquid.

  As shown in FIG. 7, the nozzle unit 19 includes a base 20, a nozzle base 21 that is rotatably supported by the base 20, and a plurality of nozzle units 21 (3 in FIG. 7). ) Nozzle head portions 22.

  According to the above configuration, the nozzle unit 19 ejects the high-pressure microbubble liquid from the tip of the nozzle head portion 22 in the gas-liquid counter-current water 16 in the direction indicated by the broken line arrow in FIG. As a result, the nozzle base portion 21 and the plurality of nozzle head portions 22 rotate together (turn), so that the microbubble liquid can be spread and stirred throughout the treated water tank 14.

(Modification of the embodiment)
In the above embodiment, ozone and the same solvent are simultaneously supplied to both the treated water tank 14F and the treated water tank 14B by the first supply system, and both the treated water tank 14F at the front stage and the treated water tank 14B at the subsequent stage are fed by the second supply system. However, the present invention is not limited to this. For example, a switching means such as a valve for switching between supply to the treated water tank 14F and supply to the treated water tank 14B is provided in the piping 15 or the like of the first supply system, and the contents of the supply from the first supply system to the treated water tank 14F and the treated water tank You may comprise a water treatment system so that the supply content to 14B may differ. For example, hydrogen peroxide can be configured to be supplied only from the first supply system to the subsequent treatment water tank 14B.

  Further, a switching means such as a valve for switching between supply to the treated water tank 14F and supply to the treated water tank 14B is provided in the piping 42 of the second supply system, and the contents of the supply from the second supply system to the treated water tank 14F and the treated water tank You may comprise a water treatment system so that the supply content to 14B may differ. For example, ozone can be configured to be supplied only from the second supply system to the preceding treatment water tank 14F.

  By configuring the water treatment system as described above, water treatment can be performed flexibly.

  In the above description, when the microbubble liquid is generated, clean water (tap water, etc.) is used. However, micro water can be obtained by using a part or all of the water to be treated instead of a part of the clean water or the clean water. It is possible to reduce the amount of water used for generating the bubble liquid and to provide a low-cost water treatment system.

  In the above description, the method for controlling the diameter of the microbubble has not been described. However, when the gas-liquid two-phase flow swirl method is used as a method for making the ozone gas into a microbubble, the supply amount of liquid and the supply The diameter of the generated microbubbles can be controlled by varying and controlling the pressure, the supply amount of ozone gas, the supply pressure, and the like.

  Therefore, when generating the ozone mixture liquid, by selecting the microbubble diameter (bubble diameter) of the ozone gas as appropriate, in addition to the original effects of disinfection and sterilization, the oil and floating substances in the treated water are separated into solid and liquid. It is also possible to configure so as to.

  Moreover, although the above description demonstrated the example which connected the two treated water tanks 14F and 14B, you may comprise the water treatment system by connecting the treated water tank 14 3 or more steps in series.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 Water treatment system 11a, 11b, 33 Blower 12a, 12b Ozone generator 13 Feed water pump 14, 14F, 14B Treated water tank 14A A hanging wall (partition wall)
15, 42 Piping 15A Opening 16 Water to be treated 16F Downflow 16FU Upflow 17 Microbubble liquid generator (mixed liquid generator)
18 Nozzle 18A Supply hole 19 Nozzle unit 20 Base 21 Nozzle base portion 22 Nozzle head portion 31a, 31b, 31c Supply device 32 Oxygen microbubble generator 35a, 35b, 35c, 35d, 51, 52 Valve 42A Sprinkle cylinder OMB Ozone gas Micro bubble

Claims (5)

The ozone gas supplied to generate ozone mixed liquid microbubbles solution was mixed with conveying liquid in the bubble shape, the ozone mixed liquid through a pipe water to be treated Ru is disposed within the process water tank that will be accommodated A mixed liquid generating device that is supplied into the treated water tank and brought into contact with the treated water;
The separately from the liquid mixture generating device, and ozone, the ozone supply device for supplying the fine bubbles through the placed Ru diffuser into the process water tank,
With water treatment system. A first supply device for supplying at least one of ammonia or a pH adjuster into the treated water tank via the pipe;
The water treatment system according to claim 1, further comprising: Oxygen microbubble generator for supplying oxygen gas into the treated water tank into the treated water tank and supplying it into the treated water tank via the pipe, or hydrogen peroxide in the treated water tank via the pipe The water treatment system according to claim 1, further comprising at least one of a second supply device for supplying to the water. The treated water tank includes a first treated water tank and a second treated water tank connected in series with each other,
The water treatment system according to any one of claims 1 to 3, further comprising:   A mixed liquid generating device used in a water treatment system having an ozone supply device that supplies ozone as fine bubbles via an air diffuser disposed in a treated water tank in which treated water is stored,
  Provided separately from the ozone supply device,
  An ozone mixed liquid that is a microbubble liquid in which the supplied ozone gas is bubbled and mixed with a transport liquid is generated, and the ozone mixing is performed via a pipe disposed in the treated water tank in which the treated water is stored. Supplying a liquid into the treated water tank and contacting the treated water;
Mixed liquid generator.

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