Apparatus and method for treating liquid to be treated

Abstract

To shorten the time required for supplying and discharging a liquid to be treated.SOLUTION: A liquid treatment apparatus includes a treatment tank 1 for storing a liquid D to be treated, a movable partition 2 for partitioning the inside of the treatment tank 1 into a first partition S1 and a second partition S2 which are liquid-shielded so that the liquid does not flow to each other, a first feed port S1 for feeding the liquid D to be treated to the first partition 10a, a first discharge port S1 for discharging a non-treated liquid from the first partition 10b, a second feed port S2 for feeding the liquid D to be treated to the second partition 11a, and a second discharge port S2 for discharging the non-treated liquid from the second partition. 11b, the movable partition 2 is movable between a first state along the sidewall S1 of the treatment tank 1 in the first section S2 and a second state along the sidewall S1 of the treatment tank 1 in the second section 1S while maintaining the liquid shielding state of the first section S2 and the second section 1S.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a treatment apparatus and a treatment method for a liquid to be treated. [Background technology]

[0002] There are two types of treatment methods for liquids to be treated: continuous and batch (batch) treatment. For example, the methods described in Patent Documents 1 and 2 are continuous treatment methods. While continuous treatment allows for uninterrupted treatment, in order to strictly maintain the target treatment quality, it is desirable to detect the flow rate and properties of the liquid to be treated and the quality of the treated liquid, and to control the treatment conditions. For example, the method described in Patent Document 1 describes controlling the amount of carbon dioxide blown in based on the detection results of the flow rate and pH of the liquid to be treated, and returning the treated liquid to the liquid to be treated when the detection results of the ion concentration of the treated liquid are above a predetermined value. Therefore, continuous treatment methods may not be suitable when there is a large variation in the components of the liquid to be treated or when it is desired to simplify the treatment device.

[0003] On the other hand, the batch method involves storing the liquid to be treated in a treatment tank and then discharging the treated liquid from the treatment tank once the target treatment quality has been reached, making it suitable for cases where strict treatment quality must be maintained or where the treatment equipment must be simplified.

[0004] However, with conventional batch systems, the next liquid to be treated cannot be supplied to the treatment tank until the treated liquid has been completely discharged, and this requires both the time required to supply one batch of the liquid to be treated and the time required to discharge one batch of the treated liquid, which inevitably results in lower treatment efficiency compared to continuous systems.

[0005] It goes without saying that this problem does not depend on the object or content of processing if batch processing is performed using a processing tank. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2019-51452 [Patent Document 2] Japanese Patent Application Publication No. 2023-092789 Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, the main problem to be solved by the present invention is to provide a treatment device and method that can shorten the time required for supplying and discharging the liquid to be treated. [Means for solving the problem]

[0008] The treatment device and treatment method for a liquid to be treated that solve the above problems are as follows. <First aspect> a treatment tank for storing the liquid to be treated; a movable partition that divides the treatment tank into a first compartment and a second compartment that are liquid-tight so that liquid does not flow between them; a first supply port that supplies the liquid to be treated to the first compartment; a first outlet for discharging treated liquid from the first compartment; a second supply port that supplies the liquid to be treated to the second compartment; a second outlet for discharging the treated liquid from the second compartment; The movable partition is movable between a first state in which the partition extends along the side wall of the treatment tank in the second compartment and a second state in which the partition extends along the side wall of the treatment tank in the first compartment, while maintaining a liquid-blocking state between the first compartment and the second compartment. A treatment apparatus for a liquid to be treated, comprising:

[0009] (Action and effect) In this treatment device, a first liquid supply / drain step including simultaneously supplying the liquid to be treated from the first supply port to the first compartment and discharging the treated liquid stored in the second compartment from the second discharge port while moving the movable partition from the second state to the first state, and a second liquid supply / drain step including simultaneously supplying the liquid to be treated from the second supply port to the second compartment and discharging the treated liquid stored in the first compartment from the first discharge port while moving the movable partition from the first state to the second state, can be performed alternately, sandwiched between treatment steps of the liquid to be treated in the treatment tank. Thus, in this treatment device, although treatment is performed in a batchwise manner using a treatment tank, liquid supply and discharge can be performed simultaneously, and the time required for supplying and discharging the liquid to be treated can be significantly reduced compared to conventional methods that require both the time required to supply one batch of the liquid to be treated and the time required to discharge one batch of the treated liquid. In order to shorten the time required for supplying and discharging the liquid, it is possible to use a larger capacity pump or to use two treatment tanks and operate them alternately in order to increase the supply and discharge speed of the liquid to be treated, but the device of this embodiment is more advantageous in terms of cost and installation space.

[0010] <Second aspect> the movable partition is a flexible partition sheet, The partition sheet has a semi-cylindrical wall portion that follows the shape of the inner side wall of the treatment tank across a pair of intersections between a vertical plane that horizontally bisects the interior of the treatment tank and the inner side wall of the treatment tank, and a bottom portion that extends from the lower edge of the wall portion along the bottom surface of the treatment tank to the vertical plane, an upper edge of the wall portion is not fixed to the top surface of the treatment tank, and is in contact with the top surface of the treatment tank or spaced downward from the top surface of the treatment tank; the wall portion is fixed liquid-tightly to the inner surface of the side wall of the treatment tank only at portions thereof corresponding to the pair of intersection lines with the vertical plane on the inner surface of the side wall of the treatment tank; the bottom is fixed liquid-tightly to the bottom surface of the treatment tank only at a portion thereof corresponding to the position of the intersection line between the bottom surface of the treatment tank and the vertical plane, In the first state, one surface of the wall portion contacts the inner surface of the side wall of the treatment tank and one surface of the bottom portion contacts the bottom surface of the treatment tank on one lateral side of the treatment tank, and in the second state, the other surface of the wall portion contacts the inner surface of the side wall of the treatment tank and the other surface of the bottom portion contacts the bottom surface of the treatment tank on the other lateral side of the treatment tank, an upper edge of the wall portion is positioned above the liquid levels of the liquid to be treated and the treated liquid in the treatment tank; 1 is a first embodiment of a treatment device for a liquid to be treated.

[0011] (Action and effect) The movable partition is not limited as long as it can move between the first state and the second state while isolating the first and second compartments so that liquid does not flow between them, but when it is made of a flexible partition sheet as in the present embodiment, the structure is particularly simple, as it does not require a separate drive mechanism for moving the movable partition. That is, in the present embodiment, by simultaneously supplying the liquid to be treated from the first supply port to the first compartment and discharging the treated liquid stored in the second compartment from the second discharge port, the movable partition can be moved from the second state to the first state while maintaining the liquid levels in the first and second compartments at approximately the same level, and with a change in the storage ratio in the first and second compartments. Similarly, by simultaneously supplying the treated liquid to the second compartment from the second supply port and discharging the treated liquid stored in the first compartment from the first discharge port, the liquid levels in the first compartment and the second compartment can be maintained at the same level, while the storage ratio in the first compartment and the second compartment changes, and the movable partition can be moved from the first state to the second state.

[0012] <Third aspect> A float is provided at the upper end of the partition sheet. A treatment device for a liquid to be treated according to a second aspect.

[0013] (Action and effect) According to this aspect, with a simple structure that only requires the addition of a floating body, the upper edge of the partition wall is more reliably maintained above the liquid surface not only when the partition sheet is in the first state or the second state, but also when it moves between the first and second states, thereby effectively preventing overflow between the first and second compartments.

[0014] <Fourth aspect> a supply pump for the liquid to be treated; a supply line communicating with an outlet of the supply pump, the first supply port, and the second supply port; the supply pipe line includes a common pipe line leading to an outlet of the supply pump, and a first branch pipe line leading to the first supply port and a second branch pipe line leading to the second supply port, both branching from the common pipe line; A treatment agent supply means is provided to supply a treatment agent to the common pipeline. The treatment device for a liquid to be treated according to any one of the first to third aspects.

[0015] (Action and effect) By configuring the supply system in this manner, a common supply pump and treatment agent supply means can be used to supply a treatment agent (including gases such as ozone) to the liquid to be treated supplied to the first supply port and the second supply port (there is no need to provide them separately), resulting in a simpler treatment device.

[0016] <Fifth aspect> a first sampling port for sampling the liquid to be treated in the first compartment and a second sampling port for sampling the liquid to be treated in the second compartment; The treatment device for a liquid to be treated according to any one of the first to fourth aspects.

[0017] (Action and effect) By providing sampling ports in the first and second compartments, the quality of the treated liquid in each batch can be confirmed.

[0018] <Sixth aspect> a treatment tank for storing the liquid to be treated; a movable partition that divides the treatment tank into a first compartment and a second compartment that are liquid-tight so that liquid does not flow between them; a first supply port that supplies the liquid to be treated to the first compartment; a first outlet for discharging treated liquid from the first compartment; a second supply port that supplies the liquid to be treated to the second compartment; a second outlet for discharging the treated liquid from the second compartment; The movable partition is movable between a first state in which the partition extends along the side wall of the treatment tank in the second compartment and a second state in which the partition extends along the side wall of the treatment tank in the first compartment, while maintaining a liquid-blocking state between the first compartment and the second compartment. Using a treatment device for the liquid to be treated, a first liquid supply / drain step including simultaneously supplying the liquid to be treated from the first supply port to the first compartment and discharging the treated liquid stored in the second compartment from the second discharge port while moving the movable partition from the second state to the first state; and a second liquid supply / drain step including simultaneously supplying the liquid to be treated from the second supply port to the second compartment and discharging the treated liquid stored in the first compartment from the first discharge port while moving the movable partition from the first state to the second state, the steps being performed alternately with a treatment step of the liquid to be treated in the treatment tank in between. A method for treating a liquid to be treated, comprising:

[0019] (Action and effect) This provides the same effects as the first embodiment. [Effects of the Invention]

[0020] According to the present invention, it is possible to reduce the time required to supply and discharge the liquid to be treated. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 2 is a configuration explanatory diagram showing a first liquid supply / drain step of the treatment device. [Figure 2] FIG. 10 is a configuration explanatory diagram showing a second liquid supply / drain step of the treatment device. [Figure 3] FIG. [Figure 4] FIG. 10 is a perspective view showing an example of a movable partition. [Figure 5] FIG. 10 is a perspective view showing another example of a movable partition in a first state. [Figure 6] FIG. 10 is a perspective view showing a second state of another example of the movable partition. [Figure 7] FIG. 10 is a perspective view showing another example of a movable partition in a first state. [Figure 8] FIG. 1 is a flow diagram showing an example of a treatment apparatus using ozone. [Figure 9] FIG. 1 is a flow diagram showing an example of a treatment device using carbon dioxide. DETAILED DESCRIPTION OF THE INVENTION

[0022] An example of a treatment apparatus for a liquid to be treated will be described below. Note that the following description and drawings are merely examples, and the contents of the present invention should not be construed as being limited to the following description and drawings.

[0023] (Liquid to be treated) The liquid to be treated and the treatment contents in the treatment device are not particularly limited. Examples include drainage water from tunnel premises, wastewater from a ready-mixed concrete plant for spraying, wastewater from die slime recovery, batcher plant wastewater, dry pit wastewater from river construction, drainage water from deep foundation construction, drainage water from grouting construction, drainage water from shield construction, excess muddy water from shield construction, drainage water from dredging and landfilling, drainage water from caisson construction, drainage water from cast-in-place piles, drainage water from floor cleaning, drainage water from well point construction, drainage water from foundation construction yards, drainage water from tire cleaning, drainage water from core boring, drainage water from diamond cutters, drainage water from soil contamination excavation yards, drainage water from VOC decomposition and cleaning, drainage water from incinerator demolition and cleaning, drainage water from radioactive decontamination work, drainage water from wire saw cutting work, drainage water from water jet cutting work, wastewater from paper mill processes, wastewater from pulp mill processes, cleaning wastewater from food factories, cleaning wastewater from ready-mixed concrete factories, drainage water from secondary concrete product factories, drainage water from crushed stone factory yards, gas cleaning scrubber wastewater, and waste incineration. Examples of wastewater or waste liquid purification treatment include furnace quenching tower wastewater, converter gas cleaning wastewater, arc furnace gas cleaning wastewater, silver recovery process wastewater, sand washing device wastewater, water washing neutralization wastewater, barrel polishing wastewater, electrolytic polishing wastewater, glass polishing wastewater, wet blasting wastewater, spray painting booth wastewater, cationic coating wastewater, stainless steel pickling wastewater, raw material yard wastewater, raw material conveyor cleaning wastewater, sedimentation dust wet recovery wastewater, factory yard wastewater, continuous casting wastewater, rolling cooling wastewater, dehumidification drainage, immersion cutting yard wastewater, slag yard wastewater, ship bottom bilge wastewater, shipbuilding dock wastewater, shell removal wastewater, cooling tower blowdown wastewater, dyeing factory wastewater, milk plant cleaning wastewater, tunnel wall cleaning wastewater, building exterior wall cleaning wastewater, car wash wastewater, golf course wastewater, industrial disposal site leachate, etc., as well as sewage treatment and water supply treatment (production of drinking water from river, lake, or seawater). Examples of processing contents include processing that involves changes in quality, such as adding a processing agent (including solids or liquids such as coagulants, as well as gases such as ozone and carbon dioxide) within this processing device, and continuing to store the liquid during or until the end of processing; processing that involves changes in quality, such as adding a processing agent, and storing the liquid to be treated during or until the end of processing; or storage processing that does not involve changes in quality, such as simply storing the liquid to be treated as is (simply as a buffer).

[0024] FIG. 1 shows an example of a treatment apparatus 100 for treating a liquid D. The treatment apparatus 100 includes a treatment tank 1 for storing the liquid D, a movable partition 2 for dividing the treatment tank 1 into a first compartment S1 and a second compartment S2, which are liquid-tight to prevent liquid from flowing between the two compartments, a first supply port 10a for supplying the liquid D to the first compartment S1, a first discharge port 10b for discharging the liquid not to be treated from the first compartment S1, a second supply port 11a for supplying the liquid C to the second compartment S2, and a second discharge port 11b for discharging the liquid not to be treated from the second compartment S2. The treatment apparatus 100 performs batch treatment using the treatment tank 1, while simultaneously supplying and discharging the liquid. This flow will be described in detail later, but first, the configuration of the treatment apparatus 100 will be described.

[0025] (treatment tank) The treatment tank 1 is used to store the liquid to be treated D, and is not particularly limited as long as it has a bottom wall 1B and a side wall 1S for the stored liquid and a movable partition 2 described below.However, when the movable partition 2 is formed using a partition sheet 2S described below, it is preferable that it has a cylindrical storage space because the movable partition 2 can easily fit along the side wall 1S of the treatment tank 1, but it may be changed to any shape, such as a rectangular storage space.

[0026] (movable partition) The movable partition 2 is not particularly limited as long as it can move between a first state in which it follows the side wall 1S of the treatment tank 1 in the second compartment S2 and a second state in which it follows the side wall 1S of the treatment tank 1 in the first compartment S1 while maintaining the liquid-tight state of the first compartment S1 and the second compartment S2. One preferred example of the movable partition 2 is one configured using a flexible partition sheet 2S as shown in Figures 1 to 4. More specifically, when L1 and L2 are the intersection lines between a vertical plane F that horizontally bisects the interior of the treatment tank 1 and the inner surface of the side wall 1S of the treatment tank 1, the partition sheet 2S has a semi-cylindrical wall portion 2W that extends along the shape of the inner surface of the side wall 1S of the treatment tank 1 from one intersection line L1 to the other intersection line L2, and a bottom portion 2B that extends from the lower edge of the wall portion 2W along the bottom surface of the treatment tank 1 to the vertical plane F. In the example shown in Figures 1 to 4, the storage space of the treatment tank 1 is cylindrical, so the wall portion 2W of the partition sheet 2S is in the shape of a half cylinder that fits along the inner surface of the side wall 1S of the treatment tank 1. However, as shown in Figures 5 and 6, if the storage space of the treatment tank 1 is in the shape of a square pillar, the wall portion 2W of the partition sheet 2S will be in the shape of a half square cylinder that fits along the inner surface of the side wall 1S of the treatment tank 1. The upper edge of the wall portion 2W is not fixed to the ceiling surface of the treatment tank 1 and is spaced downward from the ceiling surface of the treatment tank 1. The upper edge of the wall portion 2W may be in contact with the ceiling surface of the treatment tank 1. Furthermore, only the portions of the wall portion 2W that correspond to the pair of intersection lines L1 and L2 are fixed liquid-tight to the inner surface of the side wall 1S of the treatment tank 1, and only the portions of the bottom portion 2B that correspond to the position of the intersection line with the vertical plane on the bottom surface of the treatment tank 1 are fixed liquid-tight to the bottom surface of the treatment tank 1.

[0027] The partition sheet 2S may be fixed by mechanical joining, such as by rivets 2r as shown in Figures 5 and 6, but other means such as adhesives or welding may also be used in addition to or instead of this. If the fixing means for the partition sheet 2S alone is not sufficient to provide a liquid barrier between the first compartment S1 and the second compartment S2, a known sealing means 2c such as a caulking agent or sealant may be interposed between the fixing portion of the partition sheet 2S and the inner surface of the treatment tank 1, as necessary. The partition sheet 2S may be made of a waterproof sheet (waterproof sheet) such as a rubber sheet or tarpaulin.

[0028] The movable partition 2 may be a non-deformable, flat partition wall that moves between a pair of opposing side walls 1S in the opposing direction of the side walls 1S, as shown in Fig. 7. As will be described later, it is preferable that the movable partition 2 does not have a drive mechanism for moving the movable partition 2, but moves the movable partition 2 from the second state to the first state or from the first state to the second state, but the movable partition 2 may also be configured to be moved by a reciprocating drive mechanism driven by a drive source such as a cylinder.

[0029] (1st supply port, 1st discharge port, 2nd supply port, 2nd discharge port) The treatment tank 1 is provided with a first supply port 10a for supplying the liquid D to be treated and a first discharge port 10b for discharging the treated liquid C in the first compartment, and a second supply port 11a for supplying the liquid D to be treated and a second discharge port 11b for discharging the treated liquid C in the second compartment. The first supply port 10a and the first discharge port 10b can be provided individually as in the example shown in FIG. 9, or they can be shared supply and discharge ports 10a and 10b that lead to the treatment tank 1 as in the example shown in FIG. 1. In other words, having a supply port and a discharge port includes cases where they are provided individually and cases where they are provided as a shared port. Similarly, the second supply port 11a and the second discharge port 11b can be provided individually, or they can be shared supply and discharge ports 11a and 11b that lead to the treatment tank 1. In the latter case, a configuration can be adopted in which a common supply / discharge port for the first supply inlet 10a and the first discharge outlet 10b is connected to a supply pipeline 4 and a discharge pipeline 5 for the liquid to be treated via a first three-way valve V1, and switching of the flow path of the first three-way valve V1 switches between a first supply state in which the supply / discharge ports 10a and 10b are connected to the supply pipeline 4 but not to the discharge pipeline 5, and a first discharge state in which the supply / discharge ports 10a and 10b are connected to the discharge pipeline 5 but not to the supply pipeline 4. Similarly, in the latter case, the second supply inlet 11a and the second discharge outlet 11b are connected to a second three-way valve V2, and switching of the flow path of the second three-way valve V2 switches between a second supply state in which the supply / discharge ports 11a and 11b are connected to the supply pipeline 4 but not to the discharge pipeline 5, and a second discharge state in which the supply / discharge ports 11a and 11b are connected to the discharge pipeline 5 but not to the supply pipeline 4.

[0030] The supply ports 10a, 11a and the discharge ports 10b, 11b are preferably provided in the side wall 1S of the treatment tank 1, but the pipes having the supply ports and the pipes having the discharge ports may extend into the first compartment S1 and the second compartment S2 of the treatment tank 1, respectively (not shown). The positions of the supply ports 10a, 11a and the discharge ports 10b, 11b can be determined as appropriate. However, if the discharge ports 10b, 11b are provided in the lower end of the side wall 1S or the bottom wall 1B of the treatment tank 1, the liquid can be discharged from the treatment tank 1 by gravity without using a discharge pump. Of course, the discharge pump may be used to discharge the treated liquid C. In the illustrated example, the liquid D to be treated is fed to the supply ports 10a, 11a by a supply pump P1. However, the liquid D may also be fed by gravity from a storage tank (not shown) for the treated liquid D without using the supply pump P1.

[0031] (Regarding treatment agent supply) As shown in the illustrated example, the supply pipe 4 extending from the outlet of the supply pump P1 to the first supply port 10a and the second supply port 11a preferably includes a common pipe 4a leading to the outlet of the supply pump P1 and a first branch pipe 4b branching from the common pipe 4a, leading to the first supply port 10a, and a second branch pipe 4b branching from the common pipe 4a, leading to the second supply port 11a. This configuration is preferable because it allows the liquid D to be treated to be supplied from the common supply pump P1 to the treatment tank 1 via the first supply port 10a or the second supply port 11a. In this configuration, when a treatment agent (including a gas such as ozone) is supplied to the liquid D to be treated, which is supplied to the first supply port 10a and the second supply port 11a, the treatment agent may be supplied to the first branch pipe 4b and the second branch pipe 4b, respectively. However, a configuration in which the treatment agent is supplied to the common pipe 4a is preferable because it eliminates the need for separate supply means for the treatment agent D, resulting in a simpler treatment apparatus 100.

[0032] (Floating body) When the movable partition 2 is a partition sheet 2S, it is preferable to provide a float 12 on the upper end of the partition sheet 2S, as shown in Figures 1 to 6. Examples of the float 12 include balloons and urethane foam. The float may be provided continuously over the entire upper end of the partition sheet 2S as in the example shown in Figure 4, or may be provided intermittently as in the example shown in Figure 5, or may be provided in only one location (not shown). Alternatively, or in addition to this, rails and runners that move along the rails may be provided on the top surface of the treatment tank 1, and the upper end of the partition sheet 2S may be suspended and supported by these runners. In the example shown in Figure 5, the float 12 is fixed to the partition sheet 2S by rivets 2r, but other fixing structures may also be used.

[0033] (sampling port) A first sampling port 8a for sampling the liquid to be treated in the first section S1 of the treatment tank 1 and a second sampling port 8b for sampling the liquid to be treated in the second section S2 can also be provided. This makes it possible to sample the liquid to be treated in each batch and check its quality. In this case, it is preferable to provide a liquid quality sensor 13 that detects the quality of the liquid to be treated D sampled from the sampling ports 8a and 8b, and to control the supply and discharge of the liquid to be treated in accordance with the detection results.

[0034] (Level sensor) Although not shown, the water level of the liquid to be treated D can be measured by attaching a level sensor or the like to the upper end of the treatment tank 1. This also makes it possible to control the supply and discharge of the liquid to be treated D.

[0035] (Check valve 9) A check valve 9 may be attached to the supply pipe 4 connected to the outlet of the pump P1 that supplies the liquid to be treated D. The presence of this check valve 9 makes it possible to prevent the liquid to be treated D from flowing back even if the pump P1 that supplies the liquid to be treated D stops.

[0036] (Processing method) Next, a method for treating the liquid D to be treated using the treatment device 100 will be described with reference to Figures 1 and 2. Consider an initial state in which the liquid D to be treated is not stored in the first compartment S1 and the second compartment S2 of the treatment tank 1 in the treatment device 100. First, the first three-way valve V1 is operated to establish a first supply state in which the supply and discharge ports 10a and 10b are connected to the supply pipe 4 but not to the discharge pipe 5, and the second three-way valve V2 is operated to establish a second discharge state in which the supply and discharge ports 11a and 11b are connected to the discharge pipe 5 but not to the supply pipe 4. Then, the supply pump P1 for supplying the liquid D to be treated is operated to send the liquid D to the supply pipe 4 (first operation). As a result, the liquid D to be treated is supplied from the first supply port 10a only into the first compartment S1. In the initial state, if the movable partition 2 is in the first state, where it is aligned with the side wall of the treatment tank 1 that constitutes the second compartment S2, the movable partition 2 does not move. However, in other cases, for example, if the movable partition 2 is initially in the second state, where it is aligned with the side wall of the treatment tank 1 that constitutes the first compartment S1, the movable partition 2 moves as the liquid D to be treated is supplied, and finally reaches the first state, where it is aligned with the side wall of the treatment tank 1 that constitutes the second compartment S2. In the first state, as shown in FIGS. 1 and 3 , almost the entire treatment tank 1 is the first compartment S1 that stores the liquid D to be treated, while the second compartment S2 does not store the liquid D to be treated and has a minimum volume (e.g., almost zero). When the first state is reached and the first compartment S1 has reached a predetermined storage volume, the supply pump P1 is stopped, and the system waits until the treatment of the liquid D stored in the first compartment S1 is completed. Whether the first compartment S1 has reached the predetermined storage volume can be detected by a water level meter (not shown) or the like provided in the treatment tank 1.

[0037] When treatment of the liquid D stored in the first compartment S1 is complete, the first three-way valve V1 is operated to establish a first discharge state in which the supply and discharge ports 10a and 10b are connected to the discharge line 5 but not to the supply line 4, and the second three-way valve is operated to establish a second discharge state in which the supply and discharge ports 11a and 11b are connected to the supply line 4 but not to the discharge line 5. Then, the supply pump P1, which supplies the liquid D, is operated to send the liquid D to the supply line 4 (second operation). As a result, the liquid D is supplied only to the second compartment S2 from the second supply port 11a, and the treated liquid C stored in the first compartment S1 is discharged from the first discharge port 10b. The movable partition 2 moves as the liquid D is supplied and discharged, eventually reaching a second state in which the movable partition 2 is positioned along the side wall of the treatment tank 1 in the first compartment S1. 2, in the second state, almost the entire treatment tank 1 becomes the second compartment S2 storing the liquid to be treated D, and the first compartment S1 has completed discharging the liquid to be treated and has a minimum volume (e.g., almost zero). When the second state is reached and the second compartment S2 has reached a predetermined storage volume, the supply pump P1 is stopped and the system waits until the treatment of the liquid to be treated D stored in the second compartment S2 is complete (second liquid supply / drain step). Whether the second compartment S2 has reached the predetermined storage volume can be detected by a water level meter (not shown) or the like provided in the treatment tank.

[0038] When the treatment of the liquid D to be treated stored in the second compartment S2 is completed, the process returns to the first operation. In the second and subsequent first operations, the liquid D to be treated is supplied only into the first compartment S1 from the first supply port 10a, and the treated liquid C stored in the second compartment S2 is discharged from the second discharge port 11b (first liquid supply / drain step). Thereafter, the first liquid supply / drain step by the first operation and the second liquid supply / drain step by the second operation are alternately repeated, sandwiched between treatment steps of the liquid D to be treated in the treatment tank 1. This enables simultaneous liquid supply and drainage even though the treatment is performed in a batchwise manner using a single treatment tank 1. This significantly reduces the time required to supply the liquid D to be treated and discharge the treated liquid C compared to conventional methods that require both the time required to supply one batch of the liquid D to be treated and the time required to discharge one batch of the treated liquid C.

[0039] When the movable partition 2 is the partition sheet 2S described above, in the first liquid supply / drainage process in which the liquid to be treated D is supplied to the first compartment S1 and the treated liquid C is discharged from the second compartment S2 simultaneously, and in the second liquid supply / drainage process in which the liquid to be treated D is supplied to the second compartment S2 and the treated liquid C is discharged from the first compartment S1 simultaneously, if the supply of the liquid to be treated D and the discharge of the treated liquid C are carried out so that the upper edge of the wall portion 2W of the partition sheet 2S is maintained above the liquid levels of the liquid to be treated D and the treated liquid C in the treatment tank 1 (particularly so that the liquid levels in the first compartment S1 and the second compartment S2 are maintained at the same level), the movable partition 2 can be moved from the second state to the first state, or from the first state to the second state, accompanied by a change in the storage ratio in the first compartment S1 and the second compartment S2. More specifically, as shown in Figures 4 to 6, in the first state, one surface of the wall 2W of the partition sheet 2S is in contact with the inner surface of the side wall 1W of the treatment tank 1 on one horizontal side within the treatment tank 1, and one surface of the bottom 2B of the partition sheet 2S is in contact with the bottom surface of the treatment tank 1; when transitioning to the second state, the wall 2W of the partition sheet 2S bends in the opposite direction and the bottom 2B of the partition sheet 2S flips over, so that on the other horizontal side within the treatment tank 1, the other surface (opposite surface) of the wall 2W of the partition sheet 2S is in contact with the inner surface of the side wall 1W of the treatment tank 1, and the other surface (opposite surface) of the bottom 2B of the partition sheet 2S is in contact with the bottom surface of the treatment tank 1. Furthermore, in this case, it is preferable to provide a float 12 on the upper edge of the wall 2W of the partition sheet 2S, because the buoyancy of the float 12 more reliably keeps the upper edge of the wall 2W of the partition sheet 2S above the liquid level, effectively preventing overflow between the first compartment S1 and the second compartment S2. The supply of the treated liquid D and the discharge of the treated liquid C can be adjusted as appropriate, but it is preferable to discharge the treated liquid C using the head pressure associated with the supply of the treated liquid D, because this allows the liquid level to be maintained in a simple manner.

[0040] When adding a treating agent A to a liquid D to be treated in the present treatment apparatus 100, the treating agent A can be supplied to the treatment tank 1 through a supply system for the liquid D, for example, from the supply pump P1 to the first supply port 10a and the second supply port 11a, or more preferably through the illustrated common pipe 4a. Alternatively, the treatment tank 1 may be provided with supply ports for directly supplying the treating agent A to each of the first compartment S1 and the second compartment S2, separate from the supply system for the liquid D to be treated. When adding the treating agent A, in each of the first and second supply and drainage steps, the system waits until treatment with the treating agent A is complete before proceeding to the next step. This waiting time may be predetermined, or the quality (e.g., water quality) of the liquid sampled from the first or second sampling port 8a or 8b may be checked using a liquid quality sensor 13 or the like. When the target quality is reached, the system considers treatment complete and proceeds to the next step.

[0041] (First application example) FIG. 8 shows an example of a treatment apparatus 200 that uses ozone gas to treat a liquid D, such as wastewater containing organic matter. By dissolving ozone gas in the liquid D and allowing it to react, sterilization, deodorization, decolorization, and organic matter decomposition can be achieved. More specifically, the treatment apparatus 200 includes a liquid supply unit 210 that supplies the liquid D dissolved in ozone gas, and a reaction unit 220 that stores the liquid D dissolved in ozone gas and promotes the reaction. The liquid supply unit 210 includes a liquid storage tank 6 that stores the liquid D, an ozone gas dissolver 30 that dissolves ozone gas in the liquid D, a supply pump P3 that pumps the liquid D stored in the liquid storage tank 6 and supplies it to the ozone gas dissolver 30, and an ozone gas supply device 20 that supplies ozone gas to the ozone gas dissolver 30. Reference numeral 6s denotes a strainer for preventing solids from being pumped up.

[0042] The dissolution method in the ozone gas dissolver 30 can be any known method, such as a bubble dissolution method, a filling tank method, or a contact membrane method, as long as it can dissolve ozone gas in the liquid D to be treated. The ozone gas supply device 20 that supplies ozone gas to the ozone gas dissolver 30 is not particularly limited, but for example, as shown in the figure, compressed air supplied from a compressor 21 is supplied to an ozone generator 23 via a PSA 22 and an oxygen concentrator 22, and ozone is generated from high-concentration oxygen in the ozone generator 23 and discharged. Reference numeral 25 denotes a flow path that supplies ozone gas discharged from the ozone gas supply device 20 to the ozone gas dissolver 30, and reference numeral 24 denotes a check valve provided in the flow path.

[0043] In the ozone gas dissolver 30, ozone gas supplied from the ozone gas supply device 20 is dissolved (mixed) into the liquid to be treated D supplied from the liquid to be treated storage tank 6. The liquid to be treated D into which ozone gas has been dissolved in the ozone gas dissolver 30 is supplied from the first supply port 10a provided in the treatment tank 1 of the reaction unit 220 to the first compartment S1 in the treatment tank 1, or from the second supply port 11a to the second compartment S2, and stored therein, thereby causing a decomposition reaction of organic matter to proceed. That is, organic matter contained in the liquid to be treated D is decomposed by the ozone. Microorganisms such as bacteria contained in the liquid to be treated D are also sterilized (lysed) by the ozone. Furthermore, odorous substances (e.g., volatile organic compounds (VOCs)) contained in the liquid to be treated D are also destroyed by the ozone, resulting in deodorization and elimination of odors. In order to convert the ozone gas mixed in the liquid D to be treated into microbubbles, a microbubble generating nozzle can be interposed in the flow path of the liquid D to be treated from the ozone gas dissolver 30 to the treatment tank 1, for example, in the ozone gas dissolver 30, the first supply port 10a, and the second supply port 11a.

[0044] When the water quality in the treatment tank 1 reaches the target quality or when a predetermined time has elapsed, the treated liquid C in the treatment tank 1 can be discharged from the treatment tank 1 and reused or drained. Since the treatment tank 1 of the reaction section 220 is the same as that described above, the same reference numerals are used and a description thereof is omitted, but by performing treatment alternately using the first section S1 and the second section S2, the treated liquid D can be supplied to the treatment tank 1 and the treated liquid C can be discharged from the treatment tank 1 at the same time.

[0045] (Second application example) 9 shows an example of a treatment device 300 that uses carbon dioxide D to treat a liquid D to be treated, such as calcium-containing wastewater. By dissolving carbon dioxide in the liquid D to be treated and causing a reaction, calcium can be removed from calcium-containing wastewater, such as water jet wastewater, road cutter wastewater, and wastewater from a garbage disposal plant. Therefore, purified water treated by this treatment device 300 can be reused, for example, in a water jet method, and can also be discharged into the sea, a river, etc.

[0046] The treatment device 300 includes a treatment tank 1, a first filtration device 310, and a second filtration device 330. The liquid to be treated D is first sent to the first filtration device 310 by a pump P4. Reference symbol V10 denotes a flow control valve 301 provided on the outlet side of the first filtration device 310. The first filtration device 310 is a device that mainly removes foreign matter such as sand, cement, and garbage contained in the liquid to be treated D.

[0047] Various types of filtration devices equipped with filtration membranes such as UF membranes (ultrafiltration membranes), MF membranes (microfiltration membranes), and RO membranes (reverse osmosis membranes) can be used as the first filtration device 310 and the second filtration device 330. The first filtration device 310 and the second filtration device 330 are preferably capable of removing particles of 0.3 μm or larger. The first filtration device 310 and the second filtration device 330 may be the same filtration device or different filtration devices.

[0048] The liquid D to be treated filtered by the first filtration device 310 is pumped by pump P5 through the second filtration device 330 and the carbon dioxide mixing section 320 in this order, and then supplied via supply pipe 4 from the first supply port 10a provided in the treatment tank 1 to the first compartment S1 in the treatment tank 1, or from the second supply port 11a to the second compartment S2. A supply on-off valve V3 is provided in the supply pipe 4 that communicates only with the first supply port 10a, and a supply on-off valve V4 is provided in the supply pipe 4 that communicates only with the second supply port 11a. In the carbon dioxide mixing section 320, carbon dioxide is blown into the liquid D to be treated. In the carbon dioxide mixing section 320, it is preferable to control the amount of carbon dioxide blown in to control the reaction between calcium and carbon dioxide. For this reason, the carbon dioxide mixing section 320 in the illustrated example is equipped with a storage tank 321 filled with carbon dioxide, a flow rate adjustment valve (control means) V11 that controls the flow rate of carbon dioxide, a flow meter 322 that measures the flow rate of the previous liquid to be treated D and a pH meter 323 that measures the pH, which are provided upstream of the carbon dioxide injection position (downstream of the second filtration device in the illustrated example), and a bubble column 324. By controlling the aperture of the flow rate adjustment valve V11 based on the measured values ​​(flow rate and pH) of the flow meter 322 and pH meter 323, the amount of carbon dioxide injected into the liquid to be treated D can be controlled.

[0049] The treatment tank 1 is equipped with a first discharge port 10b and a second discharge port 11b communicating with the first compartment S1 and the second compartment S2, respectively. A discharge on-off valve V7 is provided in the discharge pipe 5 communicating only with the first discharge port 10b, and a supply on-off valve V8 is provided in the discharge pipe 5 communicating only with the second discharge port 11b. The treatment tank 1 is also equipped with circulation discharge ports 10c and 11c communicating with the first compartment S1 and the second compartment S2, respectively. The circulation discharge ports 10c and 11c are each connected to a flow path leading from the first filtration device 310 to the circulation pump P5 via a circulation path 7, and this circulation path 7 is equipped with circulation path on-off valves V5 and V6, respectively. With the supply valve (V3 in the illustrated state) connected to the compartment used for that batch (compartment S1 in the illustrated state) open and the circulation path valves V5 and V6 closed, the treated liquid D supplied from pump P4 passes through first filtration device 310, circulation pump P5, second filtration device 330, and carbon dioxide mixing section 320, where it is mixed with carbon dioxide gas. The treated liquid D is then supplied to the compartment used for that batch in treatment tank 1 and stored there, where calcium reacts with carbon dioxide to produce calcium carbonate. When treatment tank 1 reaches a storage capacity for one batch, supply pump P4 and flow control valve V10 are closed, and only the circulation path valve connected to the compartment used for that batch (valve V5 on circulation path 7 connected to compartment S1 in the illustrated state) is opened. Whether or not treatment tank 1 has reached a storage capacity for one batch can be detected by a water level gauge (not shown) installed in treatment tank 1. As a result, the liquid D to be treated in the treatment tank 1 is supplied to the second filtration device 330 by the circulation pump P5, and after calcium carbonate contained in the liquid D to be treated is removed by this second filtration device 330, the liquid D is returned to the same compartment of the treatment tank 1 again via the carbon dioxide mixing section 320. The injection of carbon dioxide may be continued during circulation, or the injection of carbon dioxide by the carbon dioxide injection section may be stopped at the start or midway of circulation.

[0050] During this circulation of the treated liquid, the treated liquid D in the treatment tank 1 is sampled through the aforementioned sampling port or the like, and the calcium ion concentration of the treated liquid D is measured using an ion concentration meter (not shown). When the measured value of the ion concentration meter falls below a predetermined value, for example, below 50 g / L, the reaction is considered complete and the circulation pump P5 is stopped. The circulation path valve (V5 in the illustrated state) leading to the compartment used in that batch is closed, and the discharge valve (V7 in the illustrated state) of the discharge pipe 5 connected only to the outlet (first outlet 10b in the illustrated state) leading to the compartment used in that batch is opened. This allows the treated liquid C, from which calcium has been removed, to be discharged from the treatment tank 1. The treated liquid C can be discharged from the treatment tank 1 for reuse or wastewater. Furthermore, as the discharge of this treated liquid C begins, the supply on-off valve (V4 in the illustrated state) leading to the compartment to be used in the next batch (second compartment S2 in the illustrated state) is opened, the circulation path on-off valves V5 and V6 are closed, the flow rate adjustment valve V10 is opened, and the supply of the treated liquid D by the supply pump P4 is started. As a result, the treated liquid D is supplied to the second compartment S2 at the same time as the treated liquid is discharged from the first compartment S1. Since the treatment tank 1 is the same as described above, it is given the same reference numeral and its description will be omitted. However, by performing treatment alternately using the first compartment S1 and the second compartment S2, the treated liquid D can be supplied to the treatment tank 1 and the treated liquid C can be discharged from the treatment tank 1 at the same time as one batch is discharged after the treatment is completed by adding carbon dioxide to the treated liquid D to reach the target quality. [Industrial Applicability]

[0051] The present invention can be used as a treatment device and a treatment method for a liquid to be treated. [Explanation of symbols]

[0052] 1...treatment tank, 1B...bottom wall, 1S...side wall, 2...movable partition, 2B...bottom, 2S...wall, 2S...partition sheet, 4...supply pipe, 4a...common pipe, 4b...branch pipe, 5...discharge pipe, 6...treated liquid storage tank, 7...circulation flow path, 8...sampling port, 9...check valve, V1...first three-way valve, V2...second three-way valve, 10a...first supply port, 10b...first discharge port, 11a...second supply port, 11b...second discharge port, D...liquid to be treated, C...treated liquid, P1 to P3...pump, 20...ozone gas supply device, 20a...ozone gas generator, 21...compressor, 22... PSA, 23...O3 generator, 24...check valve, 25...ozone gas supply pipe, 6s...strainer, 27...pressure control device, 30...ozone gas dissolution section, 12...float, 13...liquid quality sensor, 310...first filtration device, 320...carbon dioxide mixing section, 321...storage tank, 322...flow meter, 323...pH meter, 330...second filtration device, V3 to V8...on-off valves, V10, V11...flow control valves, S1...first section, S2...second section, F...vertical plane, L1, L2...intersection, 100, 200, 300...treatment device, 210...treated liquid supply section, 220...reaction section.

Claims

1. a treatment tank for storing the liquid to be treated; a movable partition that divides the treatment tank into a first compartment and a second compartment that are liquid-tight so that liquid does not flow between them; a first supply port that supplies the liquid to be treated to the first compartment; a first outlet for discharging treated liquid from the first compartment; a second supply port that supplies the liquid to be treated to the second compartment; a second outlet for discharging the treated liquid from the second compartment; the movable partition is movable between a first state in which the movable partition extends along the side wall of the treatment tank in the second compartment and a second state in which the movable partition extends along the side wall of the treatment tank in the first compartment, while maintaining a liquid-blocking state between the first compartment and the second compartment; A treatment device for a liquid to be treated, characterized by:

2. the movable partition is a flexible partition sheet, The partition sheet has a semi-cylindrical wall portion that follows the shape of the inner side wall of the treatment tank across a pair of intersections between a vertical plane that horizontally bisects the interior of the treatment tank and the inner side wall of the treatment tank, and a bottom portion that extends from the lower edge of the wall portion along the bottom surface of the treatment tank to the vertical plane, an upper edge of the wall portion is spaced downward from a ceiling surface of the treatment tank; the wall portion is fixed liquid-tightly to the inner surface of the side wall of the treatment tank only at portions thereof corresponding to the pair of intersection lines with the vertical plane on the inner surface of the side wall of the treatment tank; the bottom is fixed liquid-tightly to the bottom surface of the treatment tank only at a portion thereof corresponding to the position of the intersection line between the bottom surface of the treatment tank and the vertical plane, In the first state, one surface of the wall portion contacts the inner surface of the side wall of the treatment tank and one surface of the bottom portion contacts the bottom surface of the treatment tank on one lateral side of the treatment tank, and in the second state, the other surface of the wall portion contacts the inner surface of the side wall of the treatment tank and the other surface of the bottom portion contacts the bottom surface of the treatment tank on the other lateral side of the treatment tank, an upper edge of the wall portion is positioned above the liquid levels of the liquid to be treated and the treated liquid in the treatment tank; The treatment device for a liquid to be treated according to claim 1.

3. A float is provided at the upper end of the partition sheet. The treatment device for a liquid to be treated according to claim 2.

4. a supply pump for the liquid to be treated; a supply line communicating with an outlet of the supply pump, the first supply port, and the second supply port; the supply pipe line includes a common pipe line leading to an outlet of the supply pump, and a first branch pipe line leading to the first supply port and a second branch pipe line leading to the second supply port, both branching from the common pipe line; A treatment agent supply means is provided to supply a treatment agent to the common pipeline. The treatment device for a liquid to be treated according to claim 1 or 2.

5. a first sampling port for sampling the liquid to be treated in the first compartment and a second sampling port for sampling the liquid to be treated in the second compartment; The treatment device for a liquid to be treated according to claim 1 or 2.

6. a treatment tank for storing the liquid to be treated; a movable partition that divides the treatment tank into a first compartment and a second compartment that are liquid-tight so that liquid does not flow between them; a first supply port that supplies the liquid to be treated to the first compartment; a first outlet for discharging treated liquid from the first compartment; a second supply port that supplies the liquid to be treated to the second compartment; a second outlet for discharging the treated liquid from the second compartment; The movable partition is movable between a first state in which the partition extends along the side wall of the treatment tank in the second compartment and a second state in which the partition extends along the side wall of the treatment tank in the first compartment, while maintaining a liquid-blocking state between the first compartment and the second compartment. Using a treatment device for the liquid to be treated, a first liquid supply / drain step including simultaneously supplying the liquid to be treated from the first supply port to the first compartment and discharging the treated liquid stored in the second compartment from the second discharge port while moving the movable partition from the second state to the first state; and a second liquid supply / drain step including simultaneously supplying the liquid to be treated from the second supply port to the second compartment and discharging the treated liquid stored in the first compartment from the first discharge port while moving the movable partition from the first state to the second state, the first liquid supply / drain step being performed alternately with a treatment step of the liquid to be treated in the treatment tank sandwiched therebetween. A method for treating a liquid to be treated.

Images