Liquid Purification Equipment

Abstract

To provide a liquid cleaning apparatus capable of processing a large amount of liquid in a short time.SOLUTION: A liquid cleaning apparatus 1 includes a treatment tank 2 having cylindrical side walls 2a, and an inlet channel 3 and an outlet channel 4 for liquid. A plurality of cylindrical ultraviolet lamps 7 protected by protective pipes are provided inside the treatment tank 2. The plurality of ultraviolet lamps 7 have a space 2b formed near an opening of the inlet channel 3, with the four ultraviolet lamps 7 facing the inlet channel 3 being facing parts 7a, and the other parts being the array parts 7b arranged almost evenly. The facing part 7a is inclined at about 60° to an inflow direction of liquid. The liquid flowing in from the inlet channel 3 strikes the facing part 7a through the space 2b and spirals along the side wall 2a of the treatment tank 2 due to the inclination of the facing part 7a. On the other hand, a turbulent flow is generated by the liquid passing through a gap with the facing part 7a. The turbulent flow of the liquid around the ultraviolet lamp 7 efficiently purifies the liquid.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a liquid purification device capable of purifying a large amount of liquid. [Background technology]

[0002] Conventionally, in fish farming, etc., sterilization has been performed by using an ultraviolet purifier when filtering water in a fish farm tank. Patent Document 1 discloses a liquid purifier that is made of a transparent member, has an ultraviolet lamp installed in a passage formed so that the liquid flows inside, and sterilizes the liquid flowing inside the passage. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-081990 A [Patent Document 2] Patent No. 4664496 Summary of the Invention [Problem to be solved by the invention]

[0004] The liquid purification device described in Patent Document 1, as shown in Figure 7 of the same document, can be provided with multiple passages through which the liquid flows, and the number of passages can be increased or decreased depending on the amount of liquid to be treated, so that the device can be configured to suit the size of the facility, from relatively small to medium-sized facilities.

[0005] On the other hand, when treating a large amount of liquid in a large facility, a configuration in which multiple ultraviolet lamps are provided in a passageway, as in Patent Document 2, is suitable. The treatment device described in Patent Document 2 is provided along the flow of the fluid, and multiple cylindrical tubular members each having an ultraviolet lamp therein are arranged. In addition, a guide plate that generates a vortex around the tubular member is provided on the upstream side of the liquid flow. It is said that such a configuration allows the liquid passing around the tubular member to be irradiated with ultraviolet light for a long period of time.

[0006] However, in the configuration described in Patent Document 2, the guide plate acts as a resistance to the flow, slowing down the flow rate, making it difficult to sterilize a large amount of liquid in a short period of time.

[0007] An object of the present invention is to provide a liquid purification device capable of treating a large amount of liquid in a short period of time. [Means for solving the problem]

[0008] In order to achieve the above object, the liquid purifying device of the present invention is a device that purifies a liquid by irradiating the liquid with light including ultraviolet rays, and includes a treatment tank having a cylindrical side wall, a plurality of cylindrical light source cylinders arranged along an axial direction within the treatment tank, and an inlet channel for introducing the liquid to be purified and an outlet channel for discharging the purified liquid, which are connected to the side of the treatment tank, and are provided offset in the axial direction of the treatment tank, the inlet passage and the outlet passage are fixed to the treatment tank such that their respective central axes intersect with a central axis of the treatment tank; The above process Inside the tank The treatment tank is characterized in that it has a facing portion that is provided at a point where the liquid flowing in from the inlet channel hits the facing portion and is arranged at an angle with respect to the inflow direction of the liquid from the inlet channel when viewed in the axial direction of the treatment tank.

[0009] According to the liquid purifying device of the present invention, the facing portion provided in the treatment tank or the inflow passage is inclined with respect to the inflow direction of the liquid from the inflow passage when viewed from the axial direction of the treatment tank, so that the liquid flowing in from the inflow passage flows smoothly into the treatment tank. In addition, the inclination of the facing portion changes the flow direction of the flowing in liquid, and the flow swirls in an arc along the side wall of the treatment tank.

[0010] In the liquid purifying device of the present invention, the facing portion may be formed by an arrangement of the light source cylinders. With this configuration, a space is formed near the opening of the inflow channel due to the inclination of the light source cylinders. This space allows the liquid flowing in from the inflow channel to flow smoothly into the treatment tank.

[0011] In addition, since the inflow and outflow paths are offset in the axial direction of the treatment tank, the offset is added to the arc-shaped swirl of the liquid, resulting in a spiral flow. As a result, the liquid in the treatment tank comes into contact with the multiple light source cylinders in a spiral shape, creating turbulence around the light source cylinders, allowing for efficient purification of the liquid.

[0012] The liquid purifying device of the present invention further comprises: In the cross section seen from the axial direction of the treatment tank, an arrangement section in which the light source cylinders are arranged in multiple rows concentrically and a trapezoidal space in which the light source cylinders are not arranged are formed, the inflow passage is open to the space, and the space is formed by a linear arrangement of at least three or more of the light source cylinders arranged in the arrangement section at a location where the liquid flowing in from the inflow passage hits the space, and the treatment tank has a facing section that is inclined with respect to the inflow direction of the liquid from the inflow passage when viewed from the axial direction. You may do so.

[0013] Also The light source cylinders in the arrangement section are arranged so that the irradiable ranges of the light source cylinders overlap each other. When , the liquid between adjacent light source cylinders To, The ultraviolet rays from both light source cylinders are irradiated, whereby the liquid in the treatment tank can be efficiently purified. Effect of the Invention

[0014] According to the present invention, the liquid to be treated can be brought into spiral contact with a plurality of light source cylinders provided in a treatment tank, making it possible to treat a large amount of liquid in a short period of time. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is an explanatory diagram showing the liquid purifying device of the embodiment as viewed from the side; [Diagram 2] 2 is a cross-sectional view of the liquid purification device of FIG. 1 taken along line II-II in the axial direction of the treatment tank, in which (A) is an explanatory diagram showing the opposing portion and space, and (B) is an explanatory diagram showing the irradiation range of the ultraviolet lamp. [Diagram 3] 4A and 4B are explanatory diagrams showing the flow of liquid in a treatment tank. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Next, a liquid purifying device as an embodiment of the present invention will be described with reference to Figures 1 to 3. As shown in Figure 1, the liquid purifying device 1 of this embodiment includes a cylindrical treatment tank 2 having a cylindrical side wall 2a, and an inlet channel 3 and an outlet channel 4 for liquid provided in the treatment tank 2. The liquid to be treated here is water contaminated with pathogenic E. coli or the like, and is particularly effectively applicable to seawater.

[0017] The treatment tank 2 has a lid 5 at the top and a bottom 6 at the bottom. Inside the treatment tank 2, a plurality of cylindrical ultraviolet lamps 7 are arranged as a light source cylinder. The ultraviolet lamps 7 are provided facing the axial direction of the treatment tank 2 (the vertical direction in FIG. 1), and each lamp is provided with a protective pipe (not shown) made of quartz glass on its outer periphery. Note that, in addition to the mercury ultraviolet lamps 7, LEDs or the like having the function of irradiating ultraviolet light can also be used as the light source cylinder.

[0018] The ultraviolet lamp 7 has a protective pipe held at two locations, a lid holder provided on the lid portion 5 and a bottom holder provided on the bottom portion 6 (both not shown). The ultraviolet lamp 7 is fixed to the lid holder and the bottom holder via pressure-resistant packing (not shown), and is formed so that liquid does not leak to the outside when water pressure is applied inside the treatment tank 2.

[0019] In this embodiment, the inlet passage 3 is connected to the side of the treatment tank 2, and is provided downward in the axial direction of the treatment tank 2. The outlet passage 4 is connected to the side wall 2a of the treatment tank 2 from the side, and is provided upward in the axial direction of the treatment tank.

[0020] In this embodiment, the inflow path 3 and the outflow path 4 are provided offset in the axial direction of the treatment tank 2, as shown in Fig. 1. In the present invention, offset means that the inflow path 3 and the outflow path 4 are installed apart in the axial direction of the treatment tank 2. The offset amount is the distance in the axial direction, and a suitable range is 40 cm to 200 cm. In addition, the inflow path 3 and the outflow path 4 are fixed to the treatment tank 2 so that their respective central axes intersect with the central axis of the treatment tank 2, as shown in Fig. 2.

[0021] 1, the outside of the lid 5 is protected by a protective cover 8, and the outside of the bottom 6 is protected by a pedestal 9. The treatment tank 2 and the pedestal 9 are fixed to the installation location by an installation frame 10.

[0022] Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. In this embodiment, among the multiple ultraviolet lamps 7, four ultraviolet lamps 7 facing the inflow path 3 in the inflow direction of the liquid are formed as facing portions 7a. The facing portions 7a are formed at an angle of about 60° with respect to the central axis direction, which is the inflow direction of the inflow path 3. The facing portions 7a may be made of any material, such as metal, wood, resin, ceramic, etc., other than ultraviolet lamps, as long as they have the function of generating resistance, and the cross-sectional shape may be any shape, such as a circle, polygon, ellipse, plate, etc.

[0023] The facing portion 7a of the ultraviolet lamp 7 forms a space 2b in the treatment tank 2 near the opening of the inflow channel 3. The shape of this space 2b is approximately trapezoidal in cross section as viewed from the axial direction of the treatment tank 2.

[0024] The ultraviolet lamps 7 are arranged almost uniformly in a concentric pattern in an arrangement portion 7b except for the facing portion 7a of the ultraviolet lamps 7. The number of the ultraviolet lamps 7 is 34 in this embodiment.

[0025] The arrangement of the ultraviolet lamps 7 in the array section 7b is preferably such that the irradiable ranges 7c of the ultraviolet light irradiated around the ultraviolet lamps 7 overlap, as shown in Fig. 2(B). In this embodiment, the irradiable range of ultraviolet light refers to a range within a radius of 12 cm from the light source cylinder. Moreover, overlapping of the irradiable ranges of ultraviolet light refers to a distance of 24 cm or less between adjacent light source cylinders.

[0026] The irradiation range 7c of the ultraviolet lamp 7 varies depending on the state of the liquid to be treated and the output of the ultraviolet lamp 7. For this reason, in the arrangement section 7b, the number and arrangement of the ultraviolet lamps 7 are determined taking into consideration the state of the liquid to be treated (transparency, degree of contamination, etc.), the output of the ultraviolet lamps 7, and the necessary processing capacity in the processing tank 2.

[0027] 2 can be appropriately changed depending on the speed of the liquid flowing in from the inflow channel 3. When the liquid flows quickly, the space 2b can be made larger to allow the liquid to flow smoothly into the treatment tank 2.

[0028] In one embodiment of the liquid purifying device 1, the inside diameter of the treatment tank 2 is 600 mm, the height of the treatment tank 2 is 1200 mm, and the inside diameters of the inflow path 3 and the outflow path 4 are 250 mm. The ultraviolet lamp 7 is formed such that the outside diameter of the protective pipe at the point of contact with the liquid is 30 mm. In this embodiment, the ratio of the cross-sectional area of ​​the treatment tank 2 to the cross-sectional area of ​​the ultraviolet lamp 7 is approximately 8.5%.

[0029] The liquid purifying device 1 of this embodiment has a processing capacity of 500 m 3 When performing treatment at this processing capacity, the speed of the liquid flowing in from the inlet 3 is about 10 km / h, which is faster than the flow rate of a normal purification device.

[0030] When performing a purification process of a liquid in the liquid purification device 1 of this embodiment, the liquid is supplied from an externally installed pump (not shown) via the inflow path 3. At this time, in the preparation stage, the inside of the treatment tank 2 is filled with the liquid.

[0031] Fig. 3 shows the flow of liquid in the treatment tank 2. The liquid supplied by the pump flows into the space 2b in the treatment tank 2. Since no ultraviolet lamp 7 is provided in the space 2b, the liquid flowing in from the inlet 3 hits the opposing portion 7a of the ultraviolet lamp 7 at the forefront without being obstructed by the ultraviolet lamp 7.

[0032] The liquid that hits the facing portion 7a changes its flow direction according to the inclination of the facing portion 7a with respect to the inflow path 3, and swirls in an arc along the inner wall of the treatment tank 2. Meanwhile, since there is a gap between each of the ultraviolet lamps 7 in the facing portion 7a, a part of the liquid that has flowed in passes through the gap and enters the arrangement portion 7b of the ultraviolet lamps 7.

[0033] 1, the inlet passage 3 is provided at the bottom, and the outlet passage 4 is provided at the top, so the liquid flows upward while circling in an arc along the inner wall of the treatment tank 2. That is, the liquid rises upward in a spiral. At the same time, the liquid that has entered the arrangement section 7b through the gaps in the facing section 7a merges with the liquid flowing in a spiral, generating a turbulent flow of the liquid in the arrangement section 7b.

[0034] In this way, the liquid flowing in from the inlet channel 3 rises in a spiral shape within the treatment tank 2 and is stirred by turbulent flow, sterilized and purified by irradiation with light including ultraviolet rays from the ultraviolet lamp 7, and then flows out to the outside from the outlet channel 4.

[0035] In the liquid purifying device 1 of this embodiment, the space 2b is formed near the opening of the inflow channel 3, so that it is possible to prevent a decrease in the speed of the liquid flowing in from the inflow channel 3. Therefore, compared to a case where the ultraviolet lamps 7 are evenly arranged in the treatment tank 2, it is possible to increase the inflow speed of the liquid, and it is possible to efficiently generate a spiral flow due to the inclination of the facing portion 7a.

[0036] Furthermore, the liquid flowing in through the gap in the facing portion 7a joins with the spiral flow to generate turbulence, which agitates the liquid around the ultraviolet lamp 7. As a result, even if the liquid to be purified is low in transparency, the liquid around the ultraviolet lamp 7 is agitated, so that ultraviolet rays can be irradiated evenly onto the liquid in the treatment tank 2. Therefore, the liquid purifying device 1 of this embodiment makes it possible to treat a large amount of liquid in a short period of time.

[0037] In the above embodiment, the four ultraviolet lamps 7 constituting the facing portion 7a are arranged in a straight line, but the arrangement is not limited thereto, and multiple ultraviolet lamps 7 may be arranged in an arc shape when viewed in the axial direction. In addition, in order to adjust the amount of liquid passing through the gaps between the ultraviolet lamps 7 constituting the facing portion 7a, the intervals between the ultraviolet lamps 7 may be narrowed, or a flow rate adjustment means such as a guide plate may be provided. The facing portion may be formed by providing a member such as a guide plate inside the treatment tank 2 or the inflow path 3, rather than by arranging the ultraviolet lamps 7.

[0038] In addition, in the above embodiment, the number of ultraviolet lamps 7 is 34, but this is not limited to this and can be changed as appropriate depending on the state of the liquid to be treated, the treatment capacity of the treatment tank 2, or the output of the ultraviolet lamps 7, etc.

[0039] In the above embodiment, the inflow channel 3 is provided below the treatment tank 2, and the outflow channel 4 is provided above the treatment tank 2, but the top and bottom may be reversed. The inflow channel 3 and the outflow channel 4 are fixed to the treatment tank 2 so that their respective central axes intersect with the central axis of the treatment tank 2, as shown in Fig. 2, but the central axes of the inflow channel 3 and the outflow channel 4 may be disposed away from the central axis of the treatment tank 2. This configuration makes it even easier to swirl the liquid in the treatment tank 2. [Explanation of symbols]

[0040] 1...Liquid purification device 2. Treatment tank 2a...Side wall 2b…Space 3…Inflow path 4...Outflow path 5…Lid part 6...Bottom 7...Ultraviolet lamp (light source tube) 7a…Facing part 7b…Arrangement section 7c…Irradiation possible range

Claims

1. An apparatus for purifying a liquid by irradiating the liquid with light including ultraviolet rays, A treatment tank having a cylindrical side wall; A plurality of cylindrical light source cylinders are arranged in the treatment tank along an axial direction; an inlet passage connected to a side of the treatment tank for introducing a liquid to be purified and an outlet passage for discharging the purified liquid; the inlet passage and the outlet passage are provided offset in an axial direction of the treatment tank, the inlet passage and the outlet passage are fixed to the treatment tank such that their respective central axes intersect with a central axis of the treatment tank; A liquid purification device characterized in that it has a facing portion provided at a point in the treatment tank where the liquid flowing in from the inlet channel hits, and arranged at an angle with respect to the flow direction of the liquid from the inlet channel when viewed from the axial direction of the treatment tank.

2. The liquid purification device according to claim 1, A liquid purification device, wherein the facing portion is formed by an arrangement of the light source cylinders.

3. An apparatus for purifying a liquid by irradiating the liquid with light including ultraviolet rays, A treatment tank having a cylindrical side wall; A plurality of cylindrical light source cylinders are arranged in the treatment tank along an axial direction; an inlet passage connected to a side of the treatment tank for introducing a liquid to be purified and an outlet passage for discharging the purified liquid; the inlet passage and the outlet passage are provided offset in an axial direction of the treatment tank, In the treatment tank, in a cross section seen from an axial direction of the treatment tank, an arrangement portion in which the light source cylinders are arranged in a plurality of concentric rows and a trapezoidal space in which the light source cylinders are not arranged are formed, The inlet passage is open to the space, The space is formed by a linear arrangement of at least three or more of the light source cylinders arranged in the arrangement section at the point where the liquid flowing in from the inlet channel hits, and is characterized in that it has a facing section that is inclined with respect to the flow direction of the liquid from the inlet channel when viewed from the axial direction of the treatment tank.

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