JP2014104373A - Pressure type ozone dissolution treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure type ozone dissolution treatment apparatus which can prepare ozone water of a high dissolved ozone concentration with a simple configuration of the apparatus, produces less waste ozone and achieves a high treatment efficiency by e.g. a water purification treatment.SOLUTION: A pressure type ozone dissolution treatment apparatus comprises a closed type ozone dissolution treatment vessel 1, an ozone generator 2 and a pump 3 pressure-feeding to-be-treated water W. An ozone injection conduit 4 is connected to the suction side of the pump 3; a discharge side conduit 32 of the pump 3 is extended into the ozone dissolution treatment vessel 1; and there is provided a pressure dissolution chamber 11 separated from the surroundings in the ozone dissolution treatment vessel 1 and having a single flow port 12. A spray nozzle 5 at the tip of the discharge side conduit 32 is opened so as to face the central part of the flow port 12, and to-be-treated water W mixed with ozone by the suction force of the pump 3 is sprayed, by the spray nozzle 5, into the pressure dissolution chamber 11 from the ozone injection conduit 4 through the flow port 12. The spraying dissolves ozone in water in the pressurized pressure dissolution chamber 11, and produced ozone dissolved water flows out from the periphery of the flow port 12.

Description

  The present invention relates to a pressurized ozone dissolution treatment apparatus used for generation of high-concentration ozone-dissolved water and water purification by ozone.

  It is generally known that ozone has sterilization, decolorization and deodorization action based on strong oxidizing power, and ozone has already been used for cleaning, water and sewage purification treatment, industrial wastewater treatment, water purification of lakes and rivers, etc. ing. In addition, a cleaning liquid in which ozone is contained in water as fine bubbles such as nanobubbles and microbubbles is also used in various fields. However, the above action of ozone is actually exhibited in a state dissolved in water and does not occur in the form of bubbles. Therefore, it is important to increase the dissolved concentration of ozone in order to increase the action.

  Conventionally, ozone water is produced by providing a venturi tube in the middle or at the end of the water supply pipe and using the negative pressure generated at the throttle part to inject the ozone-containing gas generated by the ozone generator into water. Venturi tube systems that generate bubbles are frequently used (for example, Patent Documents 1 to 3). On the other hand, as a gas dissolving device such as ozone, a device in which a mixture of a gas and a liquid is pressurized and fed into a sealed tank by a pump to promote gas dissolution under pressure in the sealed tank has been proposed. (For example, Patent Documents 4 to 6).

JP 05-23682 A Japanese Patent Laid-Open No. 06-285344 Japanese Patent Laid-Open No. 08-281281 JP-A-2005-880 JP 2005-270885 A JP 2009-160589 A

  However, in the conventional Venturi tube method, even if ozone can be retained in water in a large amount as fine bubbles, the secondary side cannot be pressurized with respect to the primary injection part, so the ozone dissolution rate itself is 20 In addition to the fact that ozone-dissolved water with a high concentration cannot be obtained, the equipment and treatment costs required for detoxifying waste ozone generated in large amounts as undissolved components are high. In addition, when the conventional gas dissolving apparatus is applied to the dissolution of ozone, it can be said that the dissolution of ozone is promoted to some extent under pressure in the sealed tank, but it is not sufficient, and in order to increase the treatment efficiency such as water purification. Furthermore, it is desired to increase the ozone dissolved concentration.

  In view of the above circumstances, the present invention can prepare ozone water with a very high dissolved concentration with a simple apparatus configuration, generates little waste ozone, and is highly processed when applied to water purification treatment, waste water treatment, and the like. An object of the present invention is to provide a pressurized ozone dissolution treatment apparatus that can achieve efficiency.

  If a means for achieving the above object is shown with reference numerals in the drawings, the pressurized ozone dissolution treatment apparatus according to the invention of claim 1 includes an ozone dissolution treatment tank 1 having an enclosed space 10 inside, and ozone. A generation source (ozone generator 2) and a pump 3 for pressure-feeding the treated water W into the ozone dissolution treatment tank 1 are provided, and an ozone injection line 4 connected to the ozone generation source is provided on the suction side of the pump 3 A discharge side pipe 32 of the pump 3 extends in the ozone dissolution treatment tank 1 and is connected to the ozone dissolution treatment tank 1. The pressure dissolution chamber 11 is isolated in the ozone dissolution treatment tank 1. A flow port 12 is formed at one location, the injection nozzle 5 at the tip of the discharge side pipe 32 opens toward the center of the flow port 12, and ozone is drawn from the ozone injection pipe 4 by the suction force of the pump 3. It is mixed in the water to be treated W and contains this ozone bubble The treated water W is injected into the pressure dissolution chamber 11 from the injection nozzle 5 through the flow port 12, and ozone is dissolved in the water in the pressure dissolution chamber 11 pressurized by the injection, and the pressure The ozone-dissolved water generated in the dissolution chamber 11 is configured to flow out from the peripheral portion of the circulation port 12.

  According to a second aspect of the present invention, in the pressurized ozone dissolution treatment apparatus according to the first aspect, the pressure dissolution chamber 11 has square end walls (lower wall 11a, upper wall) having a flow port 12 at one center and facing each other. 11b) and the four-side wall 11c form a rectangular box shape.

  According to a third aspect of the present invention, in the pressurized ozone dissolution treatment apparatus according to the first or second aspect, the flow port 12 of the pressure dissolution chamber 11 has a short cylindrical shape with one end side 12a protruding into the pressure dissolution chamber 11. It is configured.

  The invention of claim 4 is the pressurized ozone dissolution treatment apparatus according to any one of claims 1 to 3, wherein one end side is communicated with the pressure dissolution chamber 11 through the flow port 12 in the ozone dissolution treatment tank 1, A cylindrical stirring chamber 13 having an outlet 13a on the end side is disposed so as to be isolated from the surroundings, and the obstacle is fixed in the stirring chamber 13 around the discharge side pipe line 32 at a position near the base of the injection nozzle 5. The ozone-dissolved water that has a plate 14 and flows out from the pressure-dissolving chamber 11 passes between the peripheral edge of the baffle plate 14 and the inner peripheral surface of the stirring chamber 14, and is outside the stirring chamber 13 from the outlet 13 a ( It is configured to flow out into the bubble separation chamber 15).

  According to a fifth aspect of the present invention, in the pressurized ozone dissolution treatment apparatus according to the fourth aspect, the pressure dissolution chamber 11 is disposed in the upper portion of the ozone dissolution treatment tank 1 with the flow port 12 facing downward. A vertical cylindrical stirring chamber 13 is continuously provided below, and an annular bubble separation chamber 15 opened upward is formed around the stirring chamber 13, and the outer periphery of the bubble separation chamber 15 and the ozone dissolution treatment tank 1 are formed. Between the inner periphery of the ozone dissolution treatment tank 1, an annular descending flow path 16 that connects the top side space 10 a and the bottom side space 10 b in the ozone dissolution treatment tank 1 is formed, and a deaeration port 17 is provided at the top of the ozone dissolution treatment tank 1. The ozone dissolution treatment tank 1 has a outlet 18 with a throttle valve V1 on the bottom side.

  According to a sixth aspect of the present invention, in the pressurized ozone dissolution treatment apparatus according to the fifth aspect, a plurality of outlets 13a are provided on the lower peripheral surface of the stirring chamber 13, and the outlet directions of these outlets 13a are oblique with respect to the radial direction. As a result, the effluent is configured to generate a swirling upward flow in the bubble separation chamber 15.

  According to a seventh aspect of the present invention, in the pressurized ozone dissolution treatment apparatus according to the sixth aspect, baffle plates 19 are provided along a vertical direction at a plurality of locations in the annular descending flow path 16.

  The invention according to claim 8 is the pressurized ozone dissolution treatment apparatus according to any one of claims 5 to 7, wherein one or both of the inside of the supply line (discharge side line 32) of the pump 3 and the bubble separation chamber 15 are provided. The chemical solution injection line 60 for injecting the chemical solution M is provided.

  Next, effects of the present invention will be described with reference numerals in the drawings. First, according to the pressurized ozone dissolution treatment apparatus according to the first aspect of the present invention, ozone is mixed into the water to be treated W from the ozone injection line 4 by the suction force of the pump 3, and the water to be treated W containing the ozone bubbles. Is pressurized and fed into the ozone dissolution treatment tank 1 by the pump 3, so that the ozone dissolution treatment tank 1 is in a pressurized state. Thus, the water to be treated W containing ozone bubbles is injected into the pressure dissolution chamber 11 in the ozone dissolution treatment tank 1 from the injection nozzle 5 at the tip of the discharge side pipe 32 of the pump 3. 11 is one location, and the high-speed flow of the water to be treated W injected from the central portion hits the opposing wall surface (upper wall 11b) in the pressure dissolving chamber 11 and diffuses radially to the peripheral side, It converges to the flow port 12 side, merges, and flows out from the periphery of the flow port 12. Therefore, in the pressure melting chamber 11, the pressure of the high-speed flow injected from the injection nozzle 5 and the pressure on the outflow side become the same flow port 12 into which the high-speed flow flows, and the pressure is much higher than the surroundings. In this high pressure state, it is subjected to a strong turbulence action due to the intense flow from diffusion to convergence, so that the dissolution of ozone, which was present as fine bubbles in the water, was significantly promoted and a high concentration Ozone-dissolved water is produced.

  And when the to-be-processed water W supplied from the pump 3 is water containing organic matter or heavy metal components to be purified, in the process of leaving the pressure dissolution chamber 11 and leading to the outlet 18 of the ozone dissolution treatment tank 1, Since the strong oxidizing power of ozone dissolved in a high concentration works, the organic matter is efficiently decomposed, a reliable sterilization effect is obtained, and further, the organic matter agglomerates because the inside of the ozone dissolution treatment tank 1 is in a pressurized state. In addition, the heavy metal component is taken into the agglomerated precipitate, so that high-efficiency and high-purity treatment can be performed. In particular, when the organic matter is animal or phytoplankton, the cells are destroyed from the inside by the decompression action at the moment of flowing out from the circulation port 12 of the pressure dissolution chamber 11. Moreover, when the to-be-processed water W is a tap water or purified water, the high concentration ozone melt | dissolution water produced | generated in the pressure melt | dissolution chamber 11 is taken out from the outlet of the ozone melt treatment tank 1, and sterilization, decoloring, deodorization, etc. are required. It can be suitably used for various applications.

  According to the second aspect of the present invention, the pressure melting chamber 11 has a rectangular box shape having the flow port 12 at the center of one end wall (lower wall 11a). The flow of the water to be treated W that hits the end wall (upper wall 11b) and diffuses radially toward the peripheral side is diverted toward each corner spread spatially as a square box, and the diverted flow from both sides is produced at each corner. Due to the collision, the turbulent action is further increased, and the dissolution of ozone into water is further promoted.

  According to the invention of claim 3, since the flow port 12 of the pressure melting chamber 11 has a short cylindrical shape in which the one end side 12a projects into the pressure melting chamber 11, the outflow resistance from the pressure melting chamber 11 to the outside. As a result, the pressure dissolution chamber 11 is in a higher pressure state.

  According to the invention of claim 4, the ozone-dissolved water that has entered the stirring chamber 13 from the flow port 12 of the pressure dissolving chamber 11 strikes the baffle plate 14 and diffuses radially to the peripheral side. Since it passes through the narrow annular circulation part between the inner peripheral surface of the stirring chamber 13 and goes to the outlet 13 a, it receives a strong stirring action in the stirring chamber 13. Therefore, when the to-be-processed water W is water containing an organic substance, the reaction by contact with organic substance, a heavy metal component, etc., and ozone in a stirring chamber 13 is accelerated, decomposition | disassembly of an organic substance and the accompanying bactericidal action advance efficiently, and are high. Purification efficiency is obtained. Moreover, when the to-be-processed water W is a tap water or a purified water, melt | dissolution of ozone continues further in the stirring chamber 13, and a higher concentration ozone melt | dissolution water produces | generates.

  According to the invention of claim 5, the ozone-dissolved water released downward from the flow port 12 of the pressure dissolution chamber 11 descends in the stirring chamber 13 and enters the bubble separation chamber 15 from the outlet 13a on the lower end side. In the process of ascending in the bubble separation chamber 15, the undissolved fine bubbles are combined to form a large bubble that floats and separates and accumulates at the top of the top space 10 a in the dissolution treatment tank 1. By discharging the gas component from the deaeration port 17, the inside of the dissolution treatment tank 1 can be filled with water. On the other hand, the treated water from which the gas component has been separated descends from the top side space 10 a through the annular descending flow path 16 and enters the bottom side space 10 b, and is led out through the outlet 18. Therefore, since the throttle valve V1 is interposed in the outlet 18, the pressure in the dissolution treatment tank 1 can be arbitrarily set depending on the degree of throttling.

  According to the invention of claim 6, the outflow direction of the plurality of outflow ports 13 a provided on the lower peripheral surface of the stirring chamber 13 is inclined with respect to the radial direction, and the effluent is swirling upwardly flowing in the bubble separation chamber 15. Therefore, the bubbles separated at the upper part in the bubble separation chamber 15 gather in the center, so that the gas component can be easily discharged from the deaeration port 17.

  According to the invention of claim 7, the baffle plate 19 along the vertical direction in the process of descending the annular descending flow path 16 while the treated water reaching the top space 10 a as a swirling upward flow from the bubble separation chamber 15 swirls. Since the flow is disturbed, the remaining bubbles in the annular descending flow path 16 are further separated, and the treated water containing almost no fine bubbles can be led out from the outlet 18.

  According to the invention of claim 8, when the pressurized ozone dissolution treatment apparatus is applied to the purification treatment of water containing organic matter, heavy metal components, etc., the chemical solution M that promotes purification corresponding to the components contained in the water to be treated W. By injecting from the chemical injection line 60, the purification efficiency can be increased.

It is a flow-path block diagram of the pressurization type ozone melt | dissolution processing apparatus which concerns on one Embodiment of this invention. It is a cross-sectional top view of the principal part of the pressurization type ozone dissolution treatment apparatus. It is a vertical side view of the principal part of the pressurization type ozone dissolution treatment apparatus.

  Hereinafter, a pressurized ozone dissolution treatment apparatus according to the present invention will be specifically described with reference to the drawings. In the pressurized ozone dissolution treatment apparatus of one embodiment shown in FIG. 1, an ozone dissolution treatment tank 1 is a vertical cylinder having a convex curved surface at the top and a sealed space 10 inside, 2 is an ozone generator, and 3 is a storage tank. 7 is a pump that sucks the treated water W through the suction side pipe 31 and pressurizes and feeds it to the ozone dissolution treatment tank 1 from the discharge side pipe 32. An ozone injection line connected to the suction side of the pump 3, 6 is a chemical liquid tank, 60 is a chemical liquid injection line connected to the chemical liquid tank 6, 11 is a pressure dissolution chamber provided in an ozone dissolution treatment tank, and 13 is the pressure A vertical cylindrical stirring chamber provided below the dissolution chamber 11, 15 is an annular bubble separation chamber provided outside the stirring chamber 13, and 16 is an outer peripheral surface of the bubble separation chamber 15 and the ozone dissolution treatment tank 1. An annular descending flow path 17 formed between the inner peripheral surface of the ozone dissolution treatment Degassing port provided at the top center of the tank 1, 18 is a lead-out port provided on the bottom side of the ozone dissolution treatment vessel 1.

  As shown in FIGS. 2 and 3, the ozone dissolution treatment tank 1 is separated from the top side space 10a and the bottom side space 10b by the inner and outer cylindrical partition walls 1a and 1b, and is stirred at the center. A concentric triple cylinder structure comprising a chamber 13, an intermediate bubble separation chamber 15 and an outer annular descending flow path 16 is formed, and the bottoms of the stirring chamber 13 and the bubble separation chamber 15 are isolated from the bottom side space 10b by the horizontal partition 1c. Has been. The pressure melting chamber 11 has a square box shape with a square lower wall 11a provided with a circulation port 12 in the center, a square upper wall 11b opposed to the square lower wall 11a, and a four-round peripheral wall 11c. The circulation port 12 has a short cylindrical shape, and one end side 12 a protrudes into the pressure melting chamber 11.

  The stirring chamber 13 communicates with the pressure dissolution chamber 11 via the circulation port 12 on the upper end side, and communicates with the lower part of the bubble separation chamber 15 via a plurality of (two in the drawing) outlets 13a on the lower end side. Yes. In addition, each outflow port 13a is comprised from the cylindrical part which protruded with the angle with respect to the radial direction from the lower peripheral surface of this stirring chamber 13, and is set so that an outflow direction may become diagonal with respect to a radial direction by this. Has been. The bubble separation chamber 15 is open upward and communicates with the top space 10 a in the ozone dissolution treatment tank 1.

  The discharge side pipe 32 of the pump 3 enters the bottom side space 10b in the ozone dissolution treatment tank 1 horizontally, bends upward at the center position of the bottom side space 10b, passes through the horizontal partition 1c, and the stirring chamber. 13 and rises along the axial direction, and the spray nozzle 5 having a reduced diameter at the upper end thereof opens below the flow port 12 and faces the center of the flow port 12. A disc-shaped baffle plate 14 is fixed around the base side of the injection nozzle 5, and an annular circulation portion in which a gap between the peripheral edge of the baffle plate 14 and the inner peripheral surface of the stirring chamber 13 is narrowed. Forming.

  On the other hand, a throttle valve V1 is interposed in the outlet 18 on the bottom side of the ozone dissolution treatment tank 1, and the internal pressure can be arbitrarily set according to the throttle degree of the throttle valve V1. A pressure gauge 8 that displays the internal pressure is attached to the top of the ozone dissolution treatment tank 1, and an open / close valve V <b> 2 is interposed in the deaeration port 17. Furthermore, a strip-like baffle plate 19 extending in the vertical direction is fixed to both radial sides of the inner peripheral surface of the ozone dissolution treatment tank 1, and the width of the annular descending flow path 16 is approximately 1 at the position of each baffle plate 19. It is narrowed to / 2.

  The downstream side of the chemical liquid injection line 60 is branched into two flow paths 61 and 62 with the on-off valves V3 and V4 interposed therebetween, and the flow path 61 is connected to the discharge side pipe 32 of the pump 3 and the flow path 62. Enters the ozone dissolution treatment tank 1 and is connected to the foam separation chamber 15. The ozone injection line 4 is provided with a check valve CV that regulates the ozone injection direction toward the discharge side line 32.

  In the pressurized ozone dissolution treatment apparatus having the above-described configuration, ozone gas is mixed into the water to be treated W from the ozone injection line 4 by the suction force of the pump 3, and the water to be treated W containing the ozone bubbles is dissolved into the ozone water by the pump 3. Since the pressure is continuously fed into the tank 1, the inside of the ozone dissolution treatment tank 1 is in a pressurized state. In this pressurized state, for example, the lift of the pump 3 is about 0.5 MPa, and the internal pressure measured by the pressure gauge 8 is 0.1 to 0.4 MPa by adjusting the opening of the throttle valve V1 of the outlet 18. It is adjusted to become.

  And the to-be-processed water W containing the ozone bubble supplied under pressure is injected toward the center of the circulation port 12 from the injection nozzle 5 at the tip of the discharge side pipe 32, and is injected into the pressure dissolution chamber 11 as a high-speed flow. Enter. However, since the flow port 12 serves as both the inlet and the outlet of the pressure melting chamber 11 at one place, as shown by the arrow in FIG. It hits the upper wall 11b and diffuses radially to the peripheral side, further converges to the flow port 12 side, merges, and flows out from the peripheral part of the flow port 12. In addition, since the pressure dissolution chamber 11 has a rectangular box shape having a circulation port 12 in the center of the lower wall 11a, the flow of the water W to be treated which is injected from the circulation port 12 and hits the upper wall 11b and diffuses to the peripheral side. As shown by the arrows in FIG. 2, the flow is diverted toward each spatially widened corner, and the diverted flow from both sides collides at each corner, and then the diagonal direction is directed toward the circulation port 12. become.

  Accordingly, in the pressure melting chamber 11, in addition to the pressure of the high-speed flow to be injected, the outflow side is throttled by the same flow port 12, the flow port 12 is short cylindrical, and the one end side 12 a into the pressure melting chamber 11. Since it has a large outflow resistance because it protrudes, it becomes a pressurized state much higher than the surroundings, and the sprayed water W is converged from the diffusion to the circulation port 12 under a high pressurized state. A strong turbulent action is caused by the violent flow, so that the dissolution of ozone, which was present as fine bubbles in water, is remarkably promoted, and high-concentration ozone-dissolved water is generated. In addition, the flow velocity of the to-be-processed water W injected from the injection nozzle 5 is normally set to about 8-15 m / sec.

  Thus, the high-concentration ozone-dissolved water generated in the pressure dissolution chamber 11 flows into the stirring chamber 13 from the circulation port 12, descends in the stirring chamber 13 and flows into the bubble separation chamber 15 from the outlet 13a. It rises in the bubble separation chamber 15 to reach the top side space 10a, further flows from the top side space 10a through the annular descending flow path 16 to the bottom side space 10b, and is led out through the outlet 18 to the outside.

  Here, when the water W to be treated is water containing organic substances or heavy metal components to be purified, when it flows into the stirring chamber 13 from the pressure dissolution chamber 11, it strikes the baffle plate 14 and diffuses radially to the peripheral side. Since it passes through the narrow annular circulation portion between the peripheral edge of the baffle plate 14 and the inner peripheral surface of the stirring chamber 13, it receives a strong stirring action in the stirring chamber 13. Therefore, in the process of passing through the agitation chamber 13, the reaction due to the contact between ozone dissolved in a high concentration and the organic matter proceeds rapidly, and the organic matter is efficiently decomposed by the strong oxidizing power of ozone. The decomposed organic matter aggregates and precipitates in a floc form.

  In addition, when organic substance is animal and phytoplankton, the cell is destroyed from the inside by the pressure reduction action at the moment when it flows out from the circulation port 12 of the pressure dissolution chamber 11 to the stirring chamber 13. For example, when the water W to be treated is water polluted by watermelons such as ponds and lakes, first, the phytoplankton (Cyanobacteria) is formed by the group that has been subjected to strong turbulence in the pressure dissolution chamber 11 to form the watermelon. Then, when the phytoplankton cells flow out from the flow port 12 to the stirring chamber 13, the cells of the phytoplankton are killed in such a manner that they are ruptured by a sudden pressure reduction after pressurization in the pressure lysis chamber 11.

  Next, when the gas flows out from the outlet 13a of the stirring chamber 13 into the bubble separation chamber 15, the outflow direction is inclined with respect to the radial direction, so that a swirling flow is generated. Then, in the process of rising while swirling in the bubble separation chamber 15, the undissolved fine bubbles are united and floated and separated into large bubbles, and the bubbles are separated from the center of the top side space 10 a in the dissolution treatment tank 1. When organic matter remains, the decomposition reaction proceeds. The gas component accumulated at the top of the top space 10a can be discharged from the deaeration port 17, so that the dissolution treatment tank 1 can be filled with water.

  Further, in the process of descending the annular descending flow path 16 from the top side space 10a, the swirl flow continuing from the bubble separation chamber 15 is disturbed by the baffle plate 19 along the vertical direction. Decomposition proceeds. In addition, since the inside of the ozone dissolution treatment tank 1 is entirely in a pressurized state, aggregation of organic substances is promoted and a heavy metal component is taken into the aggregated precipitate. Therefore, the treated water that has reached the bottom side space 10b through the annular descending flow path 16 contains almost no fine bubbles, and is subjected to sterilization, deodorization, and decoloring action associated with decomposition of organic matter from the outlet 18. Derived. The ozone dissolved concentration of this treated water is zero or very low because ozone is consumed by decomposition of organic matter. In addition, when the organic matter density | concentration of the to-be-processed water W is high, the recirculation | reflux pipe line from the outlet 18 to the storage tank 7 is provided, and it is continuously by the circulation system which returns the treated water which exited this outlet 18 to the storage tank 7. By allowing the ozone dissolution treatment tank 1 to pass, a high-level purification treatment can be performed.

  Therefore, in this pressurized ozone dissolution treatment apparatus, when applied to the water purification treatment as described above, the chemical solution M that promotes purification corresponding to the components contained in the water to be treated W is applied to a diaphragm type or the like. The liquid feed pump P injects from the chemical liquid tank 6 into one or both of the discharge side pipe 32 and the bubble separation chamber 15 of the pump 3 through one or both of the chemical liquid injection line 60 and the branch flow paths 61 and 62. be able to. Such a chemical solution is not particularly limited, and examples thereof include a hydrogen peroxide solution, an aqueous solution of a divalent iron salt such as ferrous chloride, and a polyaluminum chloride aqueous solution. That is, since the hydrogen peroxide increases the oxidizing power in cooperation with dissolved ozone, the resolution rate of the organic matter is further improved by injecting the hydrogen peroxide into the water to be treated W. In addition, when divalent iron (II) is contained in the water to be treated W, precipitation of iron (III) oxide is generated by dissolved ozone, but it is oxidized by replacing heavy metals such as arsenic with a part of iron. The heavy metal in the treated water W is removed by being taken into the sediment. Furthermore, polyaluminum chloride acts as a flocculant.

  On the other hand, when the water to be treated W is tap water or purified water, the ozone dissolution continues further in the process in which the high-concentration ozone-dissolved water generated in the pressure dissolution chamber 11 passes through the stirring chamber 13, and the higher concentration Ozone-dissolved water is produced. And if it flows in from the stirring chamber 13 to the bubble separation chamber 15, in the process of moving to the top side space 10a as a swirling upward flow as described above, the undissolved fine bubbles are united and floated and separated, and further the annular downward flow Separation of the remaining bubbles also proceeds when descending the path 16. Accordingly, the treated water that finally reaches the bottom side space 10b becomes a very high-concentration ozone-dissolved water that contains almost no fine bubbles, so that it needs to be sterilized, decolored, deodorized, etc. through the outlet 18. It can be suitably used for various applications.

  The ozone-dissolved water finally obtained when the water to be treated W is tap water or purified water can have an average ozone concentration of 3 mg / L or higher and a maximum concentration of about 5 mg / L. It is. Moreover, according to this pressurized ozone dissolution treatment apparatus, 85% of the amount of ozone supplied from the ozone injection line 4 is assumed on the premise that the amount of ozone input is 3% at the time of natural release without affecting the environmental aquatic ecosystem. As described above, there is an advantage that up to 90% of ozone can be dissolved in the treated water W, generation of waste ozone is extremely reduced, and equipment and cost required for the decomposition treatment are reduced.

  The pressurized ozone dissolution treatment apparatus of the present invention basically includes a sealed ozone dissolution treatment tank 1, an ozone generator 2, and a pump 3 that supplies and feeds water to be treated W under pressure. The ozone injection line 4 is connected to the suction side of 3, the pressure dissolution chamber 11 is isolated in the ozone dissolution treatment tank 1, and the injection nozzle 5 at the tip of the discharge side line 32 of the pump 3 is pressurized. What is necessary is just to provide the structure opened facing the center part of the circulation port 12 provided in one place of the dissolution chamber 11. FIG. In particular, when the treatment apparatus is used only for generating high-concentration ozone-dissolved water, the configuration in which the stirring chamber 13 and the foam separation chamber 15 in the ozone dissolution treatment tank 1 in the embodiment are omitted, or only the foam separation chamber 15 is omitted. There is no problem with the configuration, and in these omitted configurations, it is possible to make the ozone dissolution treatment tank 1 horizontal. Further, in the stirring chamber 13, a baffle plate may be provided in the central portion and the lower portion together with the illustrated upper baffle plate 14. Further, the number of the baffle plates 19 in the annular descending flow path 16 can be variously changed, and the baffle plates 19 may be fixed to the inner peripheral side. When the processing apparatus is used only for generating high-concentration ozone-dissolved water, Can be omitted. In addition, various design changes can be made to the detailed configuration in addition to the embodiment.

[Water purification test]
The lake water in which the sea bream has propagated is collected as the water to be treated W, and 160 L (water temperature 24.77 ° C.) is stored in the storage tank. Water purification was performed by a continuous circulation system in which the treated water exiting the outlet was returned to the storage tank. The apparatus configuration and processing conditions are as follows.

<Device configuration>
Reservoir: Capacity 24L
Ozone dissolution treatment tank: height 60cm, diameter 20cm, tank capacity 18.8L
Pressure melting chamber: vertical and horizontal 12cm, height 5cm square box, flow diameter 30mm
Stirring chamber: Up and down length 45 cm, inner diameter 10 cm, outlet (two) diameter 16 mm, baffle plate diameter 8 cm
Bubble separation chamber: top and bottom length 50cm, inner diameter 15cm
Annular descending channel: Annular channel width 5cm, baffle plate width 2.5cm
Ozone generator: Plasma discharge tube type ozone generator CO-101 manufactured by Ishimori Seisakusho Co., Ltd.
Pump: Nikuni vortex pump 20NPD-04 (lift head 0.35MPa)
Injection nozzle: 8mm diameter

<Processing conditions>
Internal pressure of ozone dissolution treatment tank: 0.3 MPa
Pump feeding speed: 27 L / min Water temperature of treated water: 24.77 ° C
Amount of ozone injected into water to be treated: 5 g / hour as O ₃ Discharge flow rate of injection nozzle: 10 m / second

  Collect the liquid to be treated in the storage tank before the treatment in the continuous water purification system and at a predetermined elapsed time. The number of cyanobacteria (Cyanobacteria) and the concentration of chlorophyll α (a type of chlorophyll) , PH and dissolved oxygen were measured. The results are shown in Table 1 below. For measurement of cyanobacteria and chlorophyll α, a water quality meter (trade name HYDR-OLAB Datasonde 5X) manufactured by Hach, USA was used. The number of times the treatment tank passes is set to once when the amount of water passing through the ozone dissolution treatment tank reaches 160 L of treated water.

  From the results of the above table, according to the pressurized ozone dissolution treatment apparatus of the present invention, about 70% of cyanobacteria and chlorophyll α can be obtained by passing through the ozone dissolution treatment tank once for the lake water in which the blue sea bream has propagated. About 75% of the sucrose is removed, and the removal continues and the dissolved oxygen increases as the passage continues. About 94% of the anobacteria and about 93% of the chlorophyll α are removed after 8.4 passes. It can be seen that high-efficiency and high-purity treatment can be performed. In addition, although the to-be-processed water before a process had shown the cloudy dark green, it became colorless and transparent at the time of 8.4 times passage. Further, the pH of the treated water is almost stable in the slightly alkaline region.

DESCRIPTION OF SYMBOLS 1 Ozone dissolution processing tank 10 Sealed space 10a Top side space 10b Bottom side space 11 Pressure dissolution chamber 11a Lower wall (end wall)
11b Upper wall (end wall)
11c Four-sided side wall 12 Flow port 12a One end side 13 Stirring chamber 13a Outlet 14 Baffle plate 15 Foam separation chamber 16 Annular downflow passage 17 Deaeration port 18 Outlet port 19 Baffle plate 2 Ozone generator (ozone generation source)
3 Pump 31 Suction side line 32 Discharge side line 4 Ozone injection line 5 Injection nozzle M Chemical liquid V1 Throttle valve W Water to be treated

If a means for achieving the above object is shown with reference numerals in the drawings, the pressurized ozone dissolution treatment apparatus according to the invention of claim 1 includes an ozone dissolution treatment tank 1 having an enclosed space 10 inside, and ozone. A generation source (ozone generator 2) and a pump 3 for pressure-feeding the treated water W into the ozone dissolution treatment tank 1 are provided, and an ozone injection line 4 connected to the ozone generation source is provided on the suction side of the pump 3 A discharge side pipe 32 of the pump 3 extends in the ozone dissolution treatment tank 1 and is connected to the ozone dissolution treatment tank 1. The pressure dissolution chamber 11 is isolated in the ozone dissolution treatment tank 1. A flow port 12 is formed at one location, the injection nozzle 5 at the tip of the discharge side pipe 32 opens toward the center of the flow port 12, and ozone is drawn from the ozone injection pipe 4 by the suction force of the pump 3. It is mixed in the water to be treated W and contains this ozone bubble The treated water W is injected into the pressure dissolution chamber 11 from the injection nozzle 5 through the flow port 12, and ozone is dissolved in the water in the pressure dissolution chamber 11 pressurized by the injection, and the pressure The ozone-dissolved water generated in the dissolution chamber 11 is configured to flow out from the peripheral portion of the circulation port 12, and the pressure dissolution chamber 11 has a circulation port 12 at one center and has opposite rectangular end walls ( The lower wall 11a, the upper wall 11b) and the four-side wall 11c form a square box shape.

According to a second aspect of the present invention, in the pressurized ozone dissolution treatment apparatus according to the first aspect, the flow port 12 of the pressure dissolution chamber 11 has a short cylindrical shape with one end side 12a protruding into the pressure dissolution chamber 11. Yes.

The invention according to claim 3 is the pressurized ozone dissolution treatment apparatus according to claim 1 or 2 , wherein one end side is communicated with the pressure dissolution chamber 11 through the flow port 12 in the ozone dissolution treatment tank 1, and the other end side is provided. A cylindrical stirring chamber 13 having an outlet 13a is disposed so as to be isolated from the periphery, and a baffle plate 14 fixed around the discharge side pipe line 32 at a position near the base of the injection nozzle 5 in the stirring chamber 13 is provided. The ozone-dissolved water that flows out from the pressure dissolution chamber 11 passes between the peripheral edge of the baffle plate 14 and the inner peripheral surface of the stirring chamber 14, and is outside of the stirring chamber 13 (bubble separation chamber) from the outlet 13 a. 15) is configured to flow out.

According to a fourth aspect of the present invention, in the pressurized ozone dissolution treatment apparatus according to the third aspect , the pressure dissolution chamber 11 is disposed in the upper portion of the ozone dissolution treatment tank 1 with the flow port 12 facing downward. A vertical cylindrical stirring chamber 13 is continuously provided below, and an annular bubble separation chamber 15 opened upward is formed around the stirring chamber 13, and the outer periphery of the bubble separation chamber 15 and the ozone dissolution treatment tank 1 are formed. Between the inner periphery of the ozone dissolution treatment tank 1, an annular descending flow path 16 that connects the top side space 10 a and the bottom side space 10 b in the ozone dissolution treatment tank 1 is formed, and a deaeration port 17 is provided at the top of the ozone dissolution treatment tank 1. The ozone dissolution treatment tank 1 has a outlet 18 with a throttle valve V1 on the bottom side.

According to a fifth aspect of the present invention, in the pressurized ozone dissolution treatment apparatus of the fourth aspect, the lower peripheral surface of the stirring chamber 13 is provided with a plurality of outflow ports 13a, and the outflow directions of these outflow ports 13a are oblique to the radial direction. As a result, the effluent is configured to generate a swirling upward flow in the bubble separation chamber 15.

According to a sixth aspect of the present invention, in the pressurized ozone dissolution treatment apparatus according to the fifth aspect of the present invention, baffle plates 19 are provided along a vertical direction at a plurality of locations in the annular descending flow path 16.

The invention according to claim 7 is the pressurized ozone dissolution treatment apparatus according to any one of claims 4 to 6 , wherein one or both of the inside of the supply line (discharge side line 32) of the pump 3 and the bubble separation chamber 15 are provided. The chemical solution injection line 60 for injecting the chemical solution M is provided.

Further, according to the present invention, the pressure melting chamber 11 has a rectangular box shape having the circulation port 12 in the center of one end wall (lower wall 11a), and therefore, the pressure melting chamber 11 is injected from the central portion of the circulation port 12 to the other end. The flow of the water to be treated W that hits the wall (upper wall 11b) and diffuses radially toward the peripheral side is diverted toward each corner that is spatially expanded as a square box, and the diversions from both sides collide with each corner. As a result, the turbulent action is further increased, and the dissolution of ozone in water is further promoted.

According to the second aspect of the present invention, since the flow port 12 of the pressure melting chamber 11 has a short cylindrical shape with one end 12a protruding into the pressure melting chamber 11, the outflow resistance from the pressure melting chamber 11 to the outside. As a result, the pressure dissolution chamber 11 is in a higher pressure state.

According to the invention of claim 3 , the ozone-dissolved water that has entered the stirring chamber 13 from the circulation port 12 of the pressure dissolving chamber 11 hits the baffle plate 14 and diffuses radially to the peripheral side, and the peripheral portion of the baffle plate 14 Since it passes through the narrow annular circulation part between the inner peripheral surface of the stirring chamber 13 and goes to the outlet 13 a, it receives a strong stirring action in the stirring chamber 13. Therefore, when the to-be-processed water W is water containing an organic substance, the reaction by contact with organic substance, a heavy metal component, etc., and ozone in a stirring chamber 13 is accelerated, decomposition | disassembly of an organic substance and the accompanying bactericidal action advance efficiently, and are high. Purification efficiency is obtained. Moreover, when the to-be-processed water W is a tap water or a purified water, melt | dissolution of ozone continues further in the stirring chamber 13, and a higher concentration ozone melt | dissolution water produces | generates.

According to the invention of claim 4 , the ozone-dissolved water released downward from the circulation port 12 of the pressure dissolution chamber 11 descends in the stirring chamber 13 and enters the bubble separation chamber 15 from the outlet 13a on the lower end side. In the process of ascending in the bubble separation chamber 15, the undissolved fine bubbles are combined to form a large bubble that floats and separates and accumulates at the top of the top space 10 a in the dissolution treatment tank 1. By discharging the gas component from the deaeration port 17, the inside of the dissolution treatment tank 1 can be filled with water. On the other hand, the treated water from which the gas component has been separated descends from the top side space 10 a through the annular descending flow path 16 and enters the bottom side space 10 b, and is led out through the outlet 18. Therefore, since the throttle valve V1 is interposed in the outlet 18, the pressure in the dissolution treatment tank 1 can be arbitrarily set depending on the degree of throttling.

According to the invention of claim 5 , the outflow direction of the plurality of outlets 13 a provided on the lower peripheral surface of the stirring chamber 13 is oblique to the radial direction, and the effluent is swirling upflow in the bubble separation chamber 15. Therefore, the bubbles separated at the upper part in the bubble separation chamber 15 gather in the center, so that the gas component can be easily discharged from the deaeration port 17.

According to the invention of claim 6, the baffle plate 19 along the vertical direction in the process of descending the annular descending flow path 16 while the treated water reaching the top space 10 a as a swirling upward flow from the bubble separation chamber 15 swirls. Since the flow is disturbed, the remaining bubbles in the annular descending flow path 16 are further separated, and the treated water containing almost no fine bubbles can be led out from the outlet 18.

According to the invention of claim 7 , when the pressurized ozone dissolution treatment apparatus is applied to the purification treatment of water containing organic matter, heavy metal components, etc., the chemical solution M that promotes purification corresponding to the components contained in the treated water W By injecting from the chemical injection line 60, the purification efficiency can be increased.

Claims (8)

An ozone dissolution treatment tank having a sealed space inside, an ozone generation source, and a pump for pressure-feeding water to be treated into the ozone dissolution treatment tank;
An ozone injection line connected to an ozone generation source is connected to the suction side of the pump, and a discharge side pipe of the pump extends into the ozone dissolution treatment tank.
The ozone dissolution treatment tank is provided with a pressure dissolution chamber that is isolated from the periphery, and a flow port is formed at one location of the pressure dissolution chamber, and a jet at the tip of the discharge side pipe line faces the central portion of the flow port. The nozzle opens,
Ozone is mixed into the water to be treated from the ozone injection line by the suction force of the pump, and the water to be treated containing the ozone bubbles is injected from the injection nozzle into the pressure dissolution chamber through the flow port. Pressurized ozone dissolution in which ozone is dissolved in water in the pressure melting chamber pressurized from the surroundings, and ozone dissolved water generated in the pressure melting chamber flows out from the periphery of the circulation port. Processing equipment.   2. The pressurized ozone dissolution treatment apparatus according to claim 1, wherein the pressure dissolution chamber has a rectangular box shape with square end walls and four side walls facing each other with the flow port at one center.   3. The pressurized ozone dissolution treatment apparatus according to claim 1, wherein the circulation port of the pressure dissolution chamber has a short cylindrical shape with one end projecting into the pressure dissolution chamber. In the ozone dissolution treatment tank, a cylindrical stirring chamber having one end side communicating with the pressure dissolving chamber through the flow port and having an outlet on the other end side is disposed to be separated from the surroundings, and the stirring chamber A baffle plate provided around the discharge side pipe line at a position near the base of the injection nozzle,
The ozone-dissolved water flowing out from the pressure dissolving chamber passes between the peripheral edge of the baffle plate and the inner peripheral surface of the stirring chamber, and flows out of the stirring chamber from the outlet. The pressurized ozone dissolution treatment apparatus according to any one of 1 to 3.   The pressure dissolution chamber is disposed in the upper part of the ozone dissolution treatment tank with the flow port facing downward, and the vertical cylindrical stirring chamber is continuously provided under the pressure dissolution chamber, and is disposed above the stirring chamber. An annular bubble separation chamber that is open is formed, and an annular communication between the top side space and the bottom side space in the ozone dissolution treatment tank is provided between the outer periphery of the bubble separation chamber and the inner periphery of the ozone dissolution treatment tank. The pressurized ozone lysis according to claim 4, wherein a downward flow path is formed, a degassing port is provided at the top of the ozone dissolution treatment tank, and a lead-out port with a throttle valve is provided on the bottom side of the ozone dissolution treatment tank. Processing equipment.   A plurality of the outlets are provided on the lower peripheral surface of the stirring chamber, and the outflow direction of these outlets is inclined with respect to the radial direction so that the outflow liquid generates a swirling upward flow in the bubble separation chamber. The pressurized ozone dissolution treatment apparatus according to claim 5, which is configured.   The pressurized ozone dissolution treatment apparatus according to claim 6, wherein baffle plates along the vertical direction are provided at a plurality of locations in the annular descending flow path.   The pressurized ozone dissolution treatment apparatus according to any one of claims 5 to 7, further comprising a chemical solution injection conduit for injecting a chemical solution into one or both of the supply conduit of the pump and the bubble separation chamber.

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