Water treatment device

Abstract

To provide a water treatment apparatus which is easy to transport and can be used on-site.SOLUTION: A water treatment apparatus includes a plurality of carrier filling tanks that perform adsorption treatment on raw water and a portable structure that can be connected to the plurality of carrier filling tanks, and the portable structure integrates a raw water storage tank that stores raw water, a treated water storage tank that stores treated water, a waste water treatment part for treating waste water from the carrier filling tanks, and a filling tank installation part for installing the plurality of carrier filling tanks. The plurality of carrier filling tanks may be connectable to the portable structure via piping.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] One embodiment of the present invention relates to a water treatment device. [Background technology]

[0002] Conventionally, water treatment devices have been known that remove dissolved substances from wastewater by contacting the wastewater with an adsorbent. These water treatment devices have an adsorption treatment tank equipped with an adsorbent, such as ion exchange resin, activated carbon, or zeolite, and are capable of removing dissolved substances from wastewater by adsorbing them with the adsorbent. The adsorbent's adsorption capacity decreases after adsorbing a certain amount of dissolved substances. Therefore, water treatment devices are operated by replacing the adsorbent as needed depending on the concentration of dissolved substances in the treated water (treated wastewater) and the duration of use.

[0003] The upstream adsorbent, to which raw water (wastewater before treatment) is supplied, can adsorb a large amount of dissolved substances even if its adsorption performance has deteriorated due to the high concentration of dissolved substances contained in the raw water. In contrast, the downstream adsorbent must recover dissolved substances from wastewater with a reduced concentration of dissolved substances, requiring a high treatment capacity. Therefore, the downstream adsorbent may be replaced with a new one and reused as the upstream adsorbent. Such water treatment equipment is equipped with multiple adsorption treatment tanks for continuous water treatment and is operated using a multi-stage adsorption system (see, for example, Patent Documents 1 and 2). The multi-stage adsorption system involves switching between adsorption treatment tanks in use in sequence and replacing the adsorbents in some adsorption treatment tanks that have been put into a dormant state. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 7-60241 [Patent Document 2] Japanese Patent Application Publication No. 3-137905 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventional multi-stage adsorption type water treatment devices had a raw water storage tank for temporarily storing raw water, a treated water storage tank for temporarily storing treated water after adsorption treatment, and a plurality of adsorption treatment tanks fixedly installed. That is, each of the above-mentioned tanks was installed and fixed within a predetermined treatment facility, and then piping etc. was connected to form a mechanism for sending and treating the waste water to be purified to the treatment facility, and it did not have the convenience of being easily treatable on-site.

[0006] One of the problems of an embodiment of the present invention is to provide a water treatment device that is easy to transport and can be used on-site.

Means for Solving the Problems

[0007] The water treatment device according to an embodiment of the present invention includes a plurality of carrier filling tanks that perform adsorption treatment on raw water, and a portable structure that can be connected to the plurality of carrier filling tanks. The portable structure is a structure in which a raw water storage tank for storing raw water, a treated water storage tank for storing treated water, a waste water treatment unit for treating the waste water of the carrier filling tank, and a filling tank installation unit for installing the plurality of carrier filling tanks are integrated.

Brief Explanation of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings and the like. However, the present invention can be implemented in various modes without departing from the gist thereof, and is not to be construed as being limited to the description of the embodiments exemplified below. For the sake of clarity in the explanation, the drawings may schematically represent the width, thickness, shape, etc. of each part as compared with the actual mode, but this is merely an example and does not limit the interpretation of the present invention. In this specification and each drawing, elements having the same functions as those described with respect to the already shown drawings may be denoted by the same reference numerals, and redundant explanations may be omitted.

[0010] [Configuration of Water Treatment Device] FIG. 1 is a perspective view showing the configuration of a water treatment device 100 according to an embodiment of the present invention. The water treatment device 100 of this embodiment includes a plurality of carrier filling tanks 110a to 110d and a portable structure 120. Each of the carrier filling tanks 110a to 110d performs an adsorption treatment on raw water (water to be treated), which is the object to be purified. When there is no need to distinguish each of the carrier filling tanks 110a to 110d, it is simply referred to as the carrier filling tank 110.

[0011] The carrier filling tank 110 of this embodiment is a treatment tank for removing dissolved substances (colloidal particles and fine particles) from raw water (water to be treated). Inside the carrier filling tank 110, an adsorbent 20 (see FIG. 3(B)) using carbide as a carrier is filled. In this embodiment, by bringing the raw water into contact with the adsorbent 20 filled inside the carrier filling tank 110, the dissolved substances contained in the raw water are adsorbed and removed into the pores of the carbide. The adsorbent 20 may be directly filled inside the carrier filling tank 110, or may be filled in a case, basket, or bag having an opening large enough to prevent the adsorbent 20 from coming out.

[0012] In this embodiment, since a carbide carrying iron inside pores is used as the adsorbent 20, phosphorus contained in raw water can be efficiently removed. Regarding the removal of phosphorus by the carbide carrying iron, it is described in, for example, Japanese Patent Application Laid-Open No. 2019-107632. In this embodiment, an example using physical adsorption with carbide as the carrier is shown, but it is not limited to this example. For example, it is also possible to use chemical adsorption with zeolite as the carrier. The specific configuration of the carrier filling tank 110 will be described later.

[0013] The portable structure 120 of this embodiment is a water treatment structure in which a plurality of tanks required for water treatment are integrated (unitized). Specifically, the portable structure 120 includes a raw water storage tank 121, a flow rate adjustment tank 122, a treated water storage tank 123, a drainage treatment unit 124, and a filling tank installation unit 125. However, the configuration of the water treatment apparatus 100 is not limited to the example shown in FIG. 1. For example, the flow rate adjustment tank 122 may be omitted. Also, in FIG. 1, for convenience of explanation, the raw water storage tank 121 and the treated water storage tank 123 are shown separately, but in this embodiment, a partition plate 126 (see FIG. 2(A)) is provided in one tank and used as separate tanks.

[0014] The raw water storage tank 121 is a tank that temporarily stores raw water (water to be treated) to be purified. The raw water is, for example, industrial wastewater or domestic sewage. The raw water storage tank 121 stores the raw water supplied through a pipe from a factory or the like (not shown). An adjustment tank for adjusting the pH of the raw water may be connected to the raw water storage tank 121.

[0015] The flow rate adjustment tank 122 is a tank that adjusts the flow rate of the raw water supplied from the raw water storage tank 121 to the carrier filling tank 110a on the most upstream side. Specifically, the flow rate adjustment tank 122 can adjust the flow rate of the raw water supplied to the carrier filling tank 110a to a certain amount.

[0016] The treated water storage tank 123 is a tank for storing the treated water that has undergone purification treatment in a plurality of carrier filling tanks 110a to 110d. The treated water stored in the treated water storage tank 123 may be supplied to an external facility via piping or the like, or may be left stored in the treated water storage tank 123. In the present embodiment, it is also possible to transport the portable structure with the treated water stored in the treated water storage tank 123 and supply the treated water to the necessary facilities.

[0017] The drainage treatment unit 124 is a part for treating the drainage of the carrier filling tank 110. Specifically, the drainage treatment unit 124 is used as a place to discharge the water to be treated accumulated inside the carrier filling tank 110. The drainage treatment unit 124 is provided with a drainage hole 124a that functions as an outlet for discharging the drainage to the outside. Note that the drainage flowing out from the drainage hole 124a of the drainage treatment unit 124 (the water to be treated accumulated inside the carrier filling tank 110) may be supplied to the treated water storage tank 123. In this case, the treated water storage tank 123 and the drainage hole 124a, which is the outlet of the drainage treatment unit 124, may be connected by piping or the like.

[0018] Since the water treatment device 100 is a multi-stage adsorption type water treatment device having a plurality of carrier filling tanks 110a to 110d, the carrier (adsorbent) filled inside the carrier filling tank 110 is periodically replaced with a new one. At that time, the carrier filling tank 110 to be replaced (for example, the carrier filling tank 110a on the most upstream side) is temporarily evacuated to the drainage treatment unit 124, and the water to be treated inside is discharged in the drainage treatment unit 124. The carrier filling tank 110 that has completed the drainage treatment may have its internal adsorbent replaced as it is, or may be moved to another place and then have its adsorbent replaced.

[0019] The filling tank installation part 125 is a structure that functions as the base of the portable structure 120, and has a bottom part 125a and a dike part 125b. The bottom part 125a is composed of a plate-like member and has a strength capable of withstanding the load when a plurality of carrier filling tanks 110a to 110d are arranged. The dike part 125b surrounds the bottom part 125a and functions as a protective wall to prevent the drained water that has flowed out onto the bottom part 125a from leaking to the outside. The aforementioned raw water storage tank 121, treated water storage tank 123, and drainage treatment part 124 are all located inside the area surrounded by the dike part 125b. In the present embodiment, a leg part 125c is provided under the bottom part 125a, but the present invention is not limited to this example, and the leg part 125c may be omitted.

[0020] [Configuration of Portable Structure] FIG. 2 is a diagram showing the configuration of the portable structure 120 in an embodiment of the present invention. Specifically, FIGS. 2(A) to 2(C) are a plan view, a front view, and a side view of the portable structure 120, respectively. However, for convenience of explanation, in FIG. 2(A), the illustration of the flow rate adjustment tank 122 is omitted.

[0021] As shown in FIGS. 2(A) to 2(C), the portable structure 120 has a configuration in which a raw water storage tank 121, a treated water storage tank 123, and a drainage treatment part 124 are arranged on the filling tank installation part 125 as a base. That is, in the bottom part 125a of the filling tank installation part 125, the area where the raw water storage tank 121, the treated water storage tank 123, and the drainage treatment part 124 are not arranged (that is, the area surrounded by the frame line 10) is the area where a plurality of carrier filling tanks 110a to 110d are installed.

[0022] In the present embodiment, three drain holes 125aa, 125ab, and 125ac are provided in the bottom part 125a of the filling tank installation part 125. These drain holes 125aa, 125ab, and 125ac are all used to drain the drained water that has flowed out inside the dike part 125b of the filling tank installation part 125. Therefore, the drain holes 125aa, 125ab, and 125ac may usually be blocked using a plug or the like.

[0023] The area between the treated water storage tank 123 and the wastewater treatment unit 124 may be used as an area for arranging a water supply pump or the like. When arranging a water supply pump or the like, since it becomes an area where water leakage is likely to occur, in this embodiment, drain holes 125ac are arranged in advance. At this time, in the area between the treated water storage tank 123 and the wastewater treatment unit 124, the bottom 125a may be provided with an inclination so that water easily gathers in the drain holes 125ac. Furthermore, a step may be provided so that the area between the treated water storage tank 123 and the wastewater treatment unit 124 is at a lower position than the area where the carrier filling tank 110 is arranged.

[0024] [Configuration of Carrier Filling Tank] FIG. 3 is a diagram showing the configuration of the carrier filling tank 110 in an embodiment of the present invention. Specifically, FIGS. 3(A) to 3(C) are a front view, a side view, and a bottom view of the carrier filling tank 110, respectively. FIG. 3(D) is a cross-sectional view taken along line A-A in FIG. 3(B).

[0025] As shown in FIGS. 3(A) and 3(B), the carrier filling tank 110 includes a tank body 111, a lid portion 112, a bottom portion 113, and a moving means 114. The tank body 111 has a rectangular cylindrical shape, and the adsorbent 20 is disposed inside. The shape of the tank body 111 is arbitrary, but it is preferably polygonal in consideration of arranging a plurality of them in the filling tank installation portion 125 of the portable structure 120.

[0026] As shown in FIG. 3(B), a partition plate 115 and a communication portion 116 are provided inside the tank body 111. In this embodiment, the inside of the tank body 111 is divided by the partition plate 115 into a treatment area 11 and a non-treatment area 12. The adsorbent 20 is filled in the treatment area 11. That is, the water to be treated is configured to be subjected to an adsorption treatment by coming into contact with the adsorbent 20 when passing through the treatment area 11.

[0027] The water to be treated supplied to the carrier filling tank 110 can move between the treatment area 11 and the non-treatment area 12 through the communication part 116. As the partition plate 115, for example, a metal plate or a plastic plate can be used. The communication part 116 may be a metal plate or a plastic plate having a plurality of openings, or may be a wire mesh (mesh-like) member. However, when the treatment area 11 is directly filled with the adsorbent 20, it is desirable that the size of the opening (or mesh) of the communication part 116 is such that the adsorbent 20 cannot pass through.

[0028] The supply of the water to be treated to the carrier filling tank 110 is performed using any one of the plurality of openings 117a to 117d provided in the tank main body 111. As shown in Fig. 3(B), the tank main body 111 is provided with openings 117a to 117d for supplying the water to be treated or discharging the treated water.

[0029] At least two of the openings 117a to 117d may be used as necessary. For example, when the opening 117a is used as the supply port of the water to be treated and the opening 117c is used as the discharge port of the treated water, the water to be treated passes through the adsorbent 20 in an upward flow. Conversely, when the opening 117c is used as the supply port of the water to be treated and the opening 117a is used as the discharge port of the treated water, the water to be treated passes through the adsorbent 20 in a downward flow.

[0030] As another method, for example, it is also possible to use the opening 117c as the supply port of the water to be treated and the openings 117b and 117d as the discharge ports of the treated water. Thus, the openings 117a to 117d can be used in various combinations for supplying the water to be treated or discharging the treated water. Note that the lower openings 117b or 117d can also be used as discharge ports for discharging the water to be treated accumulated inside.

[0031] In this embodiment, as shown in FIG. 1, after installing a plurality of carrier filling tanks 110a to 110d in the filling tank installation part 125 of the portable structure 120, each of the carrier filling tanks 110a to 110d is connected by pipes (not shown) to perform a multi-stage adsorption treatment. The pipes are connected to at least two of the aforementioned openings 117a to 117d. The pipe connected to the supply port in the most upstream carrier filling tank 110a is connected to the outlet of the flow rate adjustment tank 122. The pipe connected to the discharge port in the most downstream carrier filling tank 110d is connected to the inlet (supply port) of the treated water storage tank 123. Also, each of the carrier filling tanks 110a to 110d is connected to each other via pipes and is configured such that the water to be treated flows from the upstream side to the downstream side.

[0032] Each of the carrier filling tanks 110a to 110d installed in the filling tank installation part 125 can be moved by moving means 114 attached to the bottom 113. As will be described later, in this embodiment, when replacing the adsorbent 20 disposed inside the carrier filling tank 110, the most upstream carrier filling tank 110a is temporarily evacuated to the drainage treatment part 124, and the other carrier filling tanks 110b to 110d are moved toward the upstream side. In this case, since the carrier filling tank 110 of this embodiment has the moving means 114, it can be moved with a light load. As the moving means 114, for example, casters can be used, but it is not limited to this example. When moving the carrier filling tank 110 in the vertical direction, a hook such as a lever hoist may be hooked on an opening (not shown) provided in the engaging part 118 provided in the tank body 111 and moved. Here, an example of evacuating the most upstream carrier filling tank 110a has been described, but conversely, it is also possible to temporarily evacuate the most downstream carrier filling tank 110d to the drainage treatment part 124 and move the other carrier filling tanks 110a to 110c toward the downstream side.

[0033] Furthermore, the bottom 113 of the carrier filling tank 110 is configured to be openable and closable. Specifically, as shown in FIGS. 3(A) to (C), the bottom 113 includes a hinge part 113a and a lock part 113b, and by releasing the lock part 113b, the bottom 113 opens.

[0034] FIG. 4 is a view showing a state in which the bottom 113 of the carrier filling tank 110 in one embodiment of the present invention is opened. As shown in FIG. 4, the bottom 113 is composed of an upper plate 113c and a lower plate 113d. The hinge portion 113a connects the upper plate 113c and the lower plate 113d, and when the lock by the lock portion 113b is released, the lower plate 113d moves downward and the bottom 113 opens.

[0035] As described above, in the present embodiment, when replacing the adsorbent 20, the carrier filling tank 110 is temporarily retracted to the drainage treatment unit 124, and the water to be treated inside the tank body 111 is discharged. At this time, as shown in FIG. 4, by opening the bottom 113, it is possible to quickly discharge the water to be treated inside. At that time, the carrier filling tank 110 may be lifted by hooking a hook such as a lever hoist on the engaging portion 118. However, not limited to this example, a drain hole may be provided in the bottom 113 and used as a drain hole when discharging the water to be treated inside the tank body 111. In this case, when the carrier filling tank 110 is in use, the drain hole may be plugged.

[0036] Further, in the present embodiment, when replacing the adsorbent 20 disposed inside the tank body 111, it is possible to take out the adsorbent 20 from the opened bottom 113. For example, when the adsorbent 20 is filled in a state of being placed in a case having an opening, etc., it can be taken out from below the tank body 111 together with the case. On the other hand, when the adsorbent 20 is directly filled inside the tank body 111, it may be taken out from below the tank body 111 after providing a tray or the like below the tank body 111. However, not limited to this example, the adsorbent 20 of the present embodiment may be taken out from above the tank body 111.

[0037] [Operation of the water treatment device] The water treatment device 100 of the present embodiment described above can be used as a multi-stage adsorption type water treatment device. Hereinafter, the state when the water treatment device 100 is operated will be described with reference to FIG. 5.

[0038] FIG. 5 is a plan view for explaining the operating state of the water treatment apparatus 100 according to an embodiment of the present invention. Specifically, FIG. 5(A) shows the flow of water during the operation of the water treatment apparatus 100. FIG. 5(B) shows how the carrier filling tank 110 is moved when the adsorbent 20 of the water treatment apparatus 100 is replaced.

[0039] In FIG. 5(A), the arrow indicated by the dashed line represents the flow of water from the raw water storage tank 121 (strictly speaking, the flow rate adjustment tank 122) through the plurality of carrier filling tanks 110a to 110d to the treated water storage tank 123. The raw water discharged from the raw water storage tank 121 is supplied to the carrier filling tank 110a on the most upstream side. Thereafter, the raw water is purified (specifically, adsorbed) by the plurality of carrier filling tanks 110a to 110d connected in series via a pipe (not shown). Then, the treated water discharged from the carrier filling tank 110d at the final stage is supplied to the treated water storage tank 123.

[0040] Next, when the time for replacing the adsorbent 20 arrives, the operation of the water treatment apparatus 100 is stopped, and the pipes connecting the respective carrier filling tanks 110a to 100d are removed. Thereafter, the carrier filling tank 110a on the most upstream side is moved to the wastewater treatment unit 124, and the wastewater accumulated inside is discharged. Also, the adsorbent 20 inside the carrier filling tank 110a is replaced with another new adsorbent 20. The replacement operation of the adsorbent 20 may be performed at a facility separate from the water treatment apparatus 100, or may be performed while the carrier filling tank 110a is arranged in the wastewater treatment unit 124.

[0041] The carrier filling tank 110b is installed in the empty space where the carrier filling tank 110a has moved. That is, as shown in FIG. 5(B), after moving the carrier filling tank 110a, the respective carrier filling tanks 110b to 110d arranged in the filling tank installation unit 125 are each moved upstream (in the direction of the arrow). At this time, since the carrier filling tank 110 of the present embodiment is provided with the moving means 114, the carrier filling tank 110 can be moved with less labor.

[0042] After moving each carrier filling tank 110b to 110d, a carrier filling tank (not shown) filled with a new adsorbent 20 is placed in the space vacated by the movement of the carrier filling tank 110d. As a result, the replacement work of the adsorbent 20 of the water treatment device 100 is completed, and a plurality of new carrier filling tanks 110a to 110d are installed. After the replacement work is completed, each carrier filling tank 110a to 110d may be connected again by a pipe (not shown), and the water treatment device 100 may be restarted.

[0043] As described above, the water treatment device 100 of the present embodiment is an integrated portable structure 120 including a raw water storage tank 121, a flow rate adjustment tank 122, a treated water storage tank 123, a wastewater treatment unit 124, and a filling tank installation unit 125. Therefore, structures required for a multi-stage adsorption type water treatment device such as the raw water storage tank 121, the flow rate adjustment tank 122, the treated water storage tank 123, and the wastewater treatment unit 124 can be easily transported.

[0044] Then, the water treatment device 100 can be operated by simply arranging the transported plurality of carrier filling tanks 110a to 110d on the filling tank installation unit 125 and connecting each tank with a pipe. Thus, unlike the conventional multi-stage adsorption type water treatment device fixed at a specific location, the water treatment device 100 of the present embodiment can transport the entire device, so that it can be used on-site (that is, at a location where purified water treatment is required).

[0045] Each embodiment of the present invention and its modifications can be implemented in appropriate combination as long as they do not contradict each other. Based on the water treatment devices of the above-described embodiments or their modifications, those in which a person skilled in the art appropriately adds, deletes, or changes the design of components, or adds, omits, or changes conditions of processes, are also included in the scope of the present invention as long as they have the gist of the present invention.

[0046] In addition, other operational effects different from those brought about by the aspects of the above-described embodiments or their modifications, which are obvious from the description of this specification or can be easily predicted by a person skilled in the art, are naturally considered to be brought about by the present invention.

Explanation of Symbols

[0047] 11…Processing area, 12…Non-processing area, 20…Adsorbent, 100…Water treatment device, 110, 110a to 110d…Carrier filling tank, 111…Tank body, 112…Cover part, 113…Bottom part, 113a…Hinge part, 113b…Lock part, 113c…Upper plate, 113d…Lower plate, 114…Moving means, 115…Partition plate, 116…Communication part, 117a to 117d…Openings, 118…Engaging part, 120…Portable structure, 121…Raw water storage tank, 122…Flow rate adjustment tank, 123…Treated water storage tank, 124…Wastewater treatment part, 125…Filling tank installation part, 125a…Bottom part, 125aa to 125ac…Drain holes, 125b…Dike part, 125c…Leg part, 126…Partition plate

Claims

1. A plurality of carrier filling tanks for performing adsorption treatment on raw water, A portable structure connectable to the plurality of carrier filling tanks, comprising: The portable structure is a structure integrating a raw water storage tank for storing raw water, a treated water storage tank for storing treated water, a drainage treatment unit for treating the drainage of the carrier filling tank, and a filling tank installation unit for installing the plurality of carrier filling tanks, The plurality of carrier filling tanks are water treatment devices that can be connected to the portable structure via piping.

2. A plurality of carrier filling tanks for performing adsorption treatment on raw water, A portable structure connectable to the plurality of carrier filling tanks, comprising: The portable structure is a structure integrating a raw water storage tank for storing raw water, a flow rate adjustment tank for adjusting the flow rate of the raw water supplied from the raw water storage tank, a treated water storage tank for storing treated water, a drainage treatment unit for treating the drainage of the carrier filling tank, and a filling tank installation unit for installing the plurality of carrier filling tanks, a water treatment device.

3. A plurality of carrier filling tanks for performing adsorption treatment on raw water, A portable structure connectable to the plurality of carrier filling tanks, comprising: The portable structure is a structure integrating a raw water storage tank for storing raw water, a treated water storage tank for storing treated water, a drainage treatment unit for treating the drainage of the carrier filling tank, and a filling tank installation unit for installing the plurality of carrier filling tanks, The portable structure includes a bottom and a dike portion surrounding the bottom, The raw water storage tank, the treated water storage tank, and the drainage treatment unit are located inside the area surrounded by the dike portion, a water treatment device.

4. The bottom has a drainage hole for draining the drainage flowing out inside the dike portion, the water treatment device according to claim 3.

5. A plurality of carrier filling tanks for performing adsorption treatment on raw water, A portable structure connectable to the plurality of carrier filling tanks, comprising: The portable structure is a structure integrating a raw water storage tank for storing raw water, a treated water storage tank for storing treated water, a drainage treatment unit for treating the drainage of the carrier filling tank, and a filling tank installation unit for installing the plurality of carrier filling tanks, Each of the plurality of carrier filling tanks has moving means at the bottom, a water treatment device.

6. A plurality of carrier filling tanks for performing adsorption treatment on raw water, A portable structure connectable to the plurality of carrier filling tanks, comprising: The portable structure is a structure in which a raw water storage tank for storing raw water, a treated water storage tank for storing treated water, a drainage treatment unit for treating the drainage of the carrier filling tank, and a filling tank installation unit for installing the plurality of carrier filling tanks are integrated. Each of the plurality of carrier filling tanks is a water treatment device with an openable and closable bottom.

7. The water treatment device according to any one of claims 1 to 6, wherein an outlet of the drainage treatment unit is connected to the treated water storage tank.

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